1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.505 2007/04/19 13:19:06 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 Another patch from the Sieve maintainer.
15 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
16 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
19 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
22 PH/02 In an ACL statement such as
24 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
26 if a client was not listed at all, or was listed with a value other than
27 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
28 the condition was not true (as it should be), so access was not denied.
29 The bug was that the ! inversion was incorrectly passed on to the second
30 item. This has been fixed.
32 PH/03 Added additional dnslists conditions == and =& which are different from
33 = and & when the dns lookup returns more than one IP address.
35 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
36 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
38 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
39 FSYNC, which compiles an option called disable_fsync that allows for
40 bypassing fsync(). The documentation is heavily laced with warnings.
42 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
44 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
45 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
46 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
47 including adding "make clean"; (3) Added -fPIC when compiling the test
48 dynamically loaded module, to get rid of a warning.
50 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
51 message fails, move_frozen_messages = true and ignore_bounce_errors_after
52 = 0s. The bug is otherwise harmless.
54 PH/07 There was a bug in the dovecot authenticator such that the value of
55 $auth1 could be overwritten, and so not correctly preserved, after a
56 successful authentication. This usually meant that the value preserved by
57 the server_setid option was incorrect.
59 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
61 PH/09 Installed PCRE release 7.0.
63 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
64 run for batched SMTP input. It is now run at the start of every message
65 in the batch. While fixing this I discovered that the process information
66 (output by running exiwhat) was not always getting set for -bs and -bS
67 input. This is fixed, and it now also says "batched" for BSMTP.
69 PH/11 Added control=no_pipelining.
71 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
72 patch, slightly modified), and move the expansion of helo_data till after
73 the connection is made in the smtp transport (so it can use these
76 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
78 PH/14 Added log_selector = +pid.
80 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
82 PH/16 Add ${if forany and ${if forall.
84 PH/17 Added dsn_from option to vary the From: line in DSNs.
86 PH/18 Flush SMTP output before performing a callout, unless control =
87 no_callout_flush is set.
89 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
90 was true (the default) a successful delivery failed to delete the retry
91 item, thus causing premature timeout of the address. The bug is now
94 PH/20 Added hosts_avoid_pipelining to the smtp transport.
96 PH/21 Long custom messages for fakedefer and fakereject are now split up
97 into multiline reponses in the same way that messages for "deny" and
98 other ACL rejections are.
100 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
101 with slight modification.
103 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
104 draft, changing the syntax and factoring some duplicate code".
106 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
107 for deliveries of the second and subsequent messages over the same SMTP
110 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
111 ${reduce, with only minor "tidies".
113 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
115 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
116 expansion side effects.
118 PH/27 When a message times out after an over-quota error from an Exim-imposed
119 quota, the bounce message says "mailbox is full". This message was not
120 being given when it was a system quota that was exceeded. It now should
123 MH/03 Made $recipients available in local_scan(). local_scan() already has
124 better access to the recipient list through recipients_list[], but
125 $recipients can be useful in postmaster-provided expansion strings.
127 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
128 in the case of a MAIL command with additional options following the
129 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
130 were accidentally chopped off.
132 PH/29 SMTP synchronization checks are implemented when a command is read -
133 there is a check that no more input is waiting when there shouldn't be
134 any. However, for some commands, a delay in an ACL can mean that it is
135 some time before the response is written. In this time, more input might
136 arrive, invalidly. So now there are extra checks after an ACL has run for
137 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
138 pipelining has not been advertised.
140 PH/30 MH's patch to allow iscntrl() characters to be list separators.
142 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
143 returned in the SMTP response when smtp_return_error_details was false.
146 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
147 instead of the C I/O that was originally supplied, because problems were
150 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
151 Exim which did not show up earlier: it was assuming that a call to
152 SSL_CTX_set_info_callback() might give an error value. In fact, there is
153 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
154 was a macro that became an assignment, so it seemed to work. This has
155 changed to a proper function call with a void return, hence the compile
156 error. Exim's code has been fixed.
158 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
161 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
163 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
165 PH/37 If a message is not accepted after it has had an id assigned (e.g.
166 because it turns out to be too big or there is a timeout) there is no
167 "Completed" line in the log. When some messages of this type were
168 selected by exigrep, they were listed as "not completed". Others were
169 picked up by some special patterns. I have improved the selection
170 criteria to be more general.
172 PH/38 The host_find_failed option in the manualroute router can now be set
173 to "ignore", to completely ignore a host whose IP address cannot be
174 found. If all hosts are ignored, the behaviour is controlled by the new
175 host_all_ignored option.
177 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
178 homing or because of multiple MX records with /mx) generated more than
179 one IP address, and the following item turned out to be the local host,
180 all the secondary addresses of the first item were incorrectly removed
181 from the list, along with the local host and any following hosts (which
182 is what is supposed to happen).
184 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
185 whoever called Exim into the -H file. In the case of the daemon it was
186 behaving confusingly. When first started, it used values for whoever
187 started the daemon, but after a SIGHUP it used the Exim user (because it
188 calls itself on a restart). I have changed the code so that it now always
191 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
192 message are rejected with the same error (e.g. no authentication or bad
193 sender address), and a DATA command is nevertheless sent (as can happen
194 with PIPELINING or a stupid MUA), the error message that was given to the
195 RCPT commands is included in the rejection of the DATA command. This is
196 intended to be helpful for MUAs that show only the final error to their
199 PH/42 Another patch from the Sieve maintainer.
201 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
202 Eximstats - Fixed some broken HTML links and added missing column headers
204 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
205 columns for Rejects, Temp Rejects, Ham, and Spam rows.
207 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
209 PH/43 Yet another patch from the Sieve maintainer.
211 PH/44 I found a way to check for a TCP/IP connection going away before sending
212 the response to the final '.' that terminates a message, but only in the
213 case where the client has not sent further data following the '.'
214 (unfortunately, this is allowed). However, in many cases there won't be
215 any further data because there won't be any more messages to send. A call
216 to select() can be used: if it shows that the input is "ready", there is
217 either input waiting, or the socket has been closed. An attempt to read
218 the next input character can distinguish the two cases. Previously, Exim
219 would have sent an OK response which the client would never have see.
220 This could lead to message repetition. This fix should cure that, at
221 least in a lot of common cases.
223 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
224 advertised in response to EHLO.
230 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
231 fixed by 4.65/MH/01 (is this a record?) are fixed:
233 (i) An empty string was always treated as zero by the numeric comparison
234 operators. This behaviour has been restored.
236 (ii) It is documented that the numeric comparison operators always treat
237 their arguments as decimal numbers. This was broken in that numbers
238 starting with 0 were being interpreted as octal.
240 While fixing these problems I realized that there was another issue that
241 hadn't been noticed. Values of message_size_limit (both the global option
242 and the transport option) were treated as octal if they started with 0.
243 The documentation was vague. These values are now always treated as
244 decimal, and I will make that clear in the documentation.
250 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
251 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
254 MH/01 Don't check that the operands of numeric comparison operators are
255 integers when their expansion is in "skipping" mode (fixes bug
256 introduced by 4.64-PH/07).
258 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
259 child addresses, Exim now panics and dies. Previously, because the count
260 is held in a short int, deliveries were likely to be lost. As such a
261 large number of recipients for a single message is ridiculous
262 (performance will be very, very poor), I have chosen to impose a limit
263 rather than extend the field.
269 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
270 leftover -K file (the existence of which was triggered by #402).
271 While we were at it, introduced process PID as part of the -K
272 filename. This should rule out race conditions when creating
275 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
276 processing considerably. Previous code took too long for large mails,
277 triggering a timeout which in turn triggers #401.
279 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
280 in the DK code in transports.c. sendfile() is not really portable,
281 hence the _LINUX specificness.
283 TF/01 In the add_headers option to the mail command in an Exim filter,
284 there was a bug that Exim would claim a syntax error in any
285 header after the first one which had an odd number of characters
288 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
289 callout verification, Exim cached a "reject" for the entire domain. This
290 is correct for most verifications, but it is not correct for a recipient
291 verification with use_sender or use_postmaster set, because in that case
292 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
293 case of MAIL FROM:<> rejection from other early rejections (e.g.
294 rejection of HELO). When verifying a recipient using a non-null MAIL
295 address, the cache is ignored if it shows MAIL FROM:<> rejection.
296 Whatever the result of the callout, the value of the domain cache is
297 left unchanged (for any other kind of callout, getting as far as trying
298 RCPT means that the domain itself is ok).
300 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
303 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
304 manifest itself as EPIPE rather than ECONNECT. When tidying away a
305 session, the daemon ignores ECONNECT errors and logs others; it now
306 ignores EPIPE as well.
308 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
309 (quoted-printable decoding).
311 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
312 later the small subsequent patch to fix an introduced bug.
314 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
316 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
318 PH/08 An error is now given if message_size_limit is specified negative.
320 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
321 to be given (somewhat) arbitrary names.
323 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
326 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
327 miscellaneous code fixes
329 PH/10 Added the log_reject_target ACL modifier to specify where to log
332 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
333 hostname. This is wrong, because it relates to the incoming message (and
334 probably the interface on which it is arriving) and not to the outgoing
335 callout (which could be using a different interface). This has been
336 changed to use the value of the helo_data option from the smtp transport
337 instead - this is what is used when a message is actually being sent. If
338 there is no remote transport (possible with a router that sets up host
339 addresses), $smtp_active_hostname is used.
341 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
342 tweaks were necessary in order to get it to work (see also 21 below):
343 (a) The code assumed that strncpy() returns a negative number on buffer
344 overflow, which isn't the case. Replaced with Exim's string_format()
346 (b) There were several signed/unsigned issues. I just did the minimum
347 hacking in of casts. There is scope for a larger refactoring.
348 (c) The code used strcasecmp() which is not a standard C function.
349 Replaced with Exim's strcmpic() function.
350 (d) The code set only $1; it now sets $auth1 as well.
351 (e) A simple test gave the error "authentication client didn't specify
352 service in request". It would seem that Dovecot has changed its
353 interface. Fortunately there's a specification; I followed it and
354 changed what the client sends and it appears to be working now.
356 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
359 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
360 address A is aliased to B and C, where B exists and C does not. Without
361 -v the output is "A verified" because verification stops after a
362 successful redirection if more than one address is generated. However,
363 with -v the child addresses are also verified. Exim was outputting "A
364 failed to verify" and then showing the successful verification for C,
365 with its parentage. It now outputs "B failed to verify", showing B's
366 parentage before showing the successful verification of C.
368 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
369 look up a TXT record in a specific list after matching in a combined
372 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
373 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
374 they consult the DNS. I had assumed they would set it the way they
375 wanted; and indeed my experiments on Linux seem to show that in some
376 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
377 To be on the safe side, however, I have now made the interface to
378 host_find_byname() similar to host_find_bydns(), with an argument
379 containing the DNS resolver options. The host_find_byname() function now
380 sets these options at its start, just as host_find_bydns() does. The smtp
381 transport options dns_qualify_single and dns_search_parents are passed to
382 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
383 of host_find_byname() use the default settings of RES_DEFNAMES
384 (qualify_single) but not RES_DNSRCH (search_parents).
386 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
387 spool_read_header() do less string testing, by means of a preliminary
388 switch on the second character of optional "-foo" lines. (This is
389 overdue, caused by the large number of possibilities that now exist.
390 Originally there were few.) While I was there, I also converted the
391 str(n)cmp tests so they don't re-test the leading "-" and the first
392 character, in the hope this might squeeze out yet more improvement.
394 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
395 flag allowing group syntax was set by the header_syntax check but not
396 turned off, possible causing trouble later; (2) The flag was not being
397 set at all for the header_verify test, causing "group"-style headers to
398 be rejected. I have now set it in this case, and also caused header_
399 verify to ignore an empty address taken from a group. While doing this, I
400 came across some other cases where the code for allowing group syntax
401 while scanning a header line wasn't quite right (mostly, not resetting
402 the flag correctly in the right place). These bugs could have caused
403 trouble for malformed header lines. I hope it is now all correct.
405 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
406 with the "reply" argument non-NULL. The code, however (which originally
407 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
408 but it didn't always do it. This confused somebody who was copying the
409 code for some other use. I have removed all the tests.
411 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
412 feature that was used to support insecure browsers during the U.S. crypto
413 embargo. It requires special client support, and Exim is probably the
414 only MTA that supported it -- and would never use it because real RSA is
415 always available. This code has been removed, because it had the bad
416 effect of slowing Exim down by computing (never used) parameters for the
417 RSA_EXPORT functionality.
419 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
420 authenticator to fail if there's a tab character in the incoming data
421 (there should never be unless someone is messing about, as it's supposed
422 to be base64-encoded). Also added, on Timo's advice, the "secured" option
423 if the connection is using TLS or if the remote IP is the same as the
424 local IP, and the "valid-client-cert option" if a client certificate has
427 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
428 authenticators. This can be used for authorization after authentication
429 succeeds. (In the case of plaintext, it servers for both authentication
432 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
433 if any retry times were supplied.
435 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
436 connection, where there is no client IP address to check. In this
437 situation, the verify now always succeeds.
439 PH/25 Applied John Jetmore's -Mset patch.
441 PH/26 Added -bem to be like -Mset, but loading a message from a file.
443 PH/27 In a string expansion for a processed (not raw) header when multiple
444 headers of the same name were present, leading whitespace was being
445 removed from all of them, but trailing whitespace was being removed only
446 from the last one. Now trailing whitespace is removed from each header
447 before concatenation. Completely empty headers in a concatenation (as
450 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
451 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
453 PH/29 [Removed. This was a change that I later backed out, and forgot to
454 correct the ChangeLog entry (that I had efficiently created) before
455 committing the later change.]
457 PH/30 Exim was sometimes attempting to deliver messages that had suffered
458 address errors (4xx response to RCPT) over the same connection as other
459 messages routed to the same hosts. Such deliveries are always "forced",
460 so retry times are not inspected. This resulted in far too many retries
461 for the affected addresses. The effect occurred only when there were more
462 hosts than the hosts_max_try setting in the smtp transport when it had
463 the 4xx errors. Those hosts that it had tried were not added to the list
464 of hosts for which the message was waiting, so if all were tried, there
465 was no problem. Two fixes have been applied:
467 (i) If there are any address or message errors in an SMTP delivery, none
468 of the hosts (tried or untried) are now added to the list of hosts
469 for which the message is waiting, so the message should not be a
470 candidate for sending over the same connection that was used for a
471 successful delivery of some other message. This seems entirely
472 reasonable: after all the message is NOT "waiting for some host".
473 This is so "obvious" that I'm not sure why it wasn't done
474 previously. Hope I haven't missed anything, but it can't do any
475 harm, as the worst effect is to miss an optimization.
477 (ii) If, despite (i), such a delivery is accidentally attempted, the
478 routing retry time is respected, so at least it doesn't keep
479 hammering the server.
481 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
482 in ${readsocket because some servers need this prod.
484 PH/32 Added some extra debug output when updating a wait-xxx database.
486 PH/33 The hint "could be header name not terminated by colon", which has been
487 given for certain expansion errors for a long time, was not being given
488 for the ${if def:h_colon_omitted{... case.
490 PH/34 The spec says: "With one important exception, whenever a domain list is
491 being scanned, $domain contains the subject domain." There was at least
492 one case where this was not true.
494 PH/35 The error "getsockname() failed: connection reset by peer" was being
495 written to the panic log as well as the main log, but it isn't really
496 panic-worthy as it just means the connection died rather early on. I have
497 removed the panic log writing for the ECONNRESET error when getsockname()
500 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
501 runs only) independently of the message's sender address. This meant
502 that, if the 4xx error was in fact related to the sender, a different
503 message to the same recipient with a different sender could confuse
504 things. In particualar, this can happen when sending to a greylisting
505 server, but other circumstances could also provoke similar problems.
506 I have changed the default so that the retry time for these errors is now
507 based a combination of the sender and recipient addresses. This change
508 can be overridden by setting address_retry_include_sender=false in the
511 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
512 remote server are returned as part of bounce messages. This was not
513 happening for LMTP over a pipe (the lmtp transport), but now it is the
514 same for both kinds of LMTP.
516 PH/38 Despite being documented as not happening, Exim was rewriting addresses
517 in header lines that were in fact CNAMEs. This is no longer the case.
519 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
520 and queue runs started by the daemon processed all messages. This has
521 been fixed so that -R and -S can now usefully be given with -q<time>.
523 PH/40 Import PCRE release 6.7 (fixes some bugs).
525 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
527 PH/42 Give an error if -q is specified more than once.
529 PH/43 Renamed the variables $interface_address and $interface_port as
530 $received_ip_address and $received_port, to make it clear that these
531 values apply to message reception, and not to the outgoing interface when
532 a message is delivered. (The old names remain recognized, of course.)
534 PH/44 There was no timeout on the connect() call when using a Unix domain
535 socket in the ${readsocket expansion. There now is.
537 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
538 be meaningful with "accept".
540 SC/01 Eximstats V1.43
541 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
543 SC/02 Eximstats V1.44
544 Use a glob alias rather than an array ref in the generated
545 parser. This improves both readability and performance.
547 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
548 Collect SpamAssassin and rejection statistics.
549 Don't display local sender or destination tables unless
550 there is data to show.
551 Added average volumes into the top table text output.
553 SC/04 Eximstats V1.46
554 Collect data on the number of addresses (recipients)
555 as well as the number of messages.
557 SC/05 Eximstats V1.47
558 Added 'Message too big' to the list of mail rejection
559 reasons (thanks to Marco Gaiarin).
561 SC/06 Eximstats V1.48
562 Mainlog lines which have GMT offsets and are too short to
563 have a flag are now skipped.
565 SC/07 Eximstats V1.49 (Alain Williams)
566 Added the -emptyok flag.
568 SC/08 Eximstats V1.50
569 Fixes for obtaining the IP address from reject messages.
571 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
572 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
573 whitesspace changes from 4.64-PH/27
575 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
578 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
579 are found, allow negative numbers in numeric criteria)
581 JJ/06 exipick.20061117.2, added new $message_body_missing variable
583 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
584 to match changes made in 4.64-PH/43
586 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
588 PH/47 Put in an explicit test for a DNS lookup of an address record where the
589 "domain" is actually an IP address, and force a failure. This locks out
590 those revolvers/nameservers that support "A-for-A" lookups, in
591 contravention of the specifications.
593 PH/48 When a host name was looked up from an IP address, and the subsequent
594 forward lookup of the name timed out, the host name was left in
595 $sender_host_name, contrary to the specification.
597 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
598 restricted to single-key lookups, Exim was not diagnosing an error if
599 * or *@ was used with a query-style lookup.
601 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
603 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
604 long ago, but noone interested enough thought of it. Let's just say that
605 the "1.1" means that there are some new functions that weren't there at
606 some point in the past.
608 PH/51 Error processing for expansion failure of helo_data from an smtp
609 transport during callout processing was broken.
611 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
612 tested/used via the -bh/-bhc/-bs options.
614 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
615 bug, fixed in subsequent PCRE releases).
617 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
618 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
620 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
626 SC/01 Use a glob alias rather than an array ref in eximstats generated
627 parser. This improves both readability and performance.
629 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
630 Don't display local sender or destination tables in eximstats unless
631 there is data to show.
632 Added average volumes into the eximstats top table text output.
634 SC/03 Collect data on the number of addresses (recipients) as well
635 as the number of messages in eximstats.
637 TF/01 Correct an error in the documentation for the redirect router. Exim
638 does (usually) call initgroups() when daemonizing.
640 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
641 with consistent privilege compared to when running as a daemon.
643 TF/03 Note in the spec that $authenticated_id is not set for local
644 submissions from trusted users.
646 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
647 Thanks to Dean Brooks <dean@iglou.com> for the patch.
649 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
650 by adding some example configuration directives to the default
651 configuration file. A little bit of work is required to uncomment the
652 directives and define how usernames and passwords are checked, but
653 there is now a framework to start from.
655 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
656 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
657 without this. I don't know how relevant this is to other LDAP libraries.
659 PH/02 Add the verb name to the "unknown ACL verb" error.
661 PH/03 Magnus Holmgren's patch for filter_prepend_home.
663 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
665 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
666 directory not expanded when it should be if an expanded home directory
667 was set for the address (which is overridden by the transport).
669 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
672 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
673 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
674 because it is too late at that time, and has no effect.
676 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
677 security issue with \' (bugzilla #107). I could not use the
678 PQescapeStringConn() function, because it needs a PGconn value as one of
681 PH/08 When testing addresses using -bt, indicate those final addresses that
682 are duplicates that would not cause an additional delivery. At least one
683 person was confused, thinking that -bt output corresponded to deliveries.
684 (Suppressing duplicates isn't a good idea as you lose the information
685 about possibly different redirections that led to the duplicates.)
687 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
688 systems where poll() doesn't work, in particular OS X.
690 PH/10 Added more information to debugging output for retry time not reached.
692 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
693 operations in malware.c.
695 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
698 PH/13 If write_rejectlog was set false when logging was sent to syslog with
699 syslog_duplication set false, log lines that would normally be written
700 both the the main log and to the reject log were not written to syslog at
703 PH/14 In the default configuration, change the use of "message" in ACL warn
704 statements to "add_header".
706 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
707 not followed by a command (e.g. "seen endif").
709 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
710 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
713 PH/17 Added extra conditions to the default value of delay_warning_condition
717 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
718 { match{$h_precedence:}{(?i)bulk|list|junk} } \
719 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
722 The Auto-Submitted: and various List- headers are standardised, whereas I
723 don't think Precedence: ever was.
725 PH/18 Refactored debugging code in route_finduser() to show more information,
726 in particular, the error code if getpwnam() issues one.
728 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
729 This is apparently needed in addition to the PH/07 change above to avoid
730 any possible encoding problems.
732 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
733 but not after initializing Perl.
735 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
736 output them only if debugging. By default they are written stderr,
737 apparently, which is not desirable.
739 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
742 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
745 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
747 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
748 authenticated or an ident call has been made. Suppress the default
749 values for $authenticated_id and $authenticated_sender (but permit -oMai
750 and -oMas) when testing with -bh.
752 PH/24 Re-jigged the order of the tests in the default configuration so that the
753 tests for valid domains and recipients precede the DNS black list and CSA
754 tests, on the grounds that those ones are more expensive.
756 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
757 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
758 This bug exists in every version of Exim that I still have, right back to
761 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
762 However, an attempt to turn on case-sensitivity in a regex key by
763 including (?-i) didn't work because the subject string was already
764 lowercased, and the effects were non-intuitive. It turns out that a
765 one-line patch can be used to allow (?-i) to work as expected.
771 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
772 other effects) broke the use of negated acl sub-conditions.
774 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
777 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
778 "Deny" causes Exim to reject the incoming connection with a 554 error.
779 Unfortunately, if there is a major crisis, such as a disk failure,
780 tcp-wrappers gives "deny", whereas what one would like would be some
781 kind of temporary error. A kludge has been added to help with this.
782 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
783 554 error is used if errno is still zero or contains ENOENT (which occurs
784 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
787 PH/03 Add -lutil to the default FreeBSD LIBS setting.
789 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
790 errors. Otherwise a message that provokes a temporary error (when other
791 messages do not) can cause a whole host to time out.
793 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
794 addresses were routed directly to files or pipes from a redirect router.
795 File deliveries just didn't batch; pipe deliveries might have suffered
798 PH/06 A failure to get a lock for a hints database would erroneously always say
799 "Failed to get write lock", even when it was really a read lock.
801 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
802 of 0600. This has been changed to use the value of the lockfile_mode
803 option (which defaults to 0600).
805 PH/08 Applied small patch from the Sieve maintainer.
807 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
808 folder from quota calculations, a direct delivery into this folder messed
809 up the contents of the maildirsize file. This was because the regex was
810 used only to exclude .Trash (or whatever) when the size of the mailbox
811 was calculated. There was no check that a delivery was happening into an
812 excluded directory. This bug has been fixed by ignoring all quota
813 processing for deliveries into excluded directories.
815 PH/10 Added the maildirfolder_create_regex option to appendfile.
821 PH/01 The code for finding all the local interface addresses on a FreeBSD
822 system running IPv6 was broken. This may well have applied to all BSD
823 systems, as well as to others that have similar system calls. The broken
824 code found IPv4 interfaces correctly, but gave incorrect values for the
825 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
826 that it would not match correctly against @[] and not recognize the IPv6
829 PH/02 The ipliteral router was not recognizing addresses of the form user@
830 [ipv6:....] because it didn't know about the "ipv6:" prefix.
832 PH/03 Added disable_ipv6.
834 PH/04 Changed $reply_address to use the raw form of the headers instead of the
835 decoded form, because it is most often used to construct To: headers
836 lines in autoreplies, and the decoded form may well be syntactically
837 invalid. However, $reply_address has leading white space removed, and all
838 newlines turned into spaces so that the autoreply transport does not
841 PH/05 If group was specified without a user on a router, and no group or user
842 was specified on a transport, the group from the router was ignored.
844 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
845 for visible compile-time settings that can be used to change these
846 numbers, for those that want even more. Backwards compatibility with old
847 spool files has been maintained. However, going back to a previous Exim
848 release will lost any variables that are in spool files.
850 PH/07 Two small changes when running in the test harness: increase delay when
851 passing a TCP/IP connection to a new process, in case the original
852 process has to generate a bounce, and remove special handling of
853 127.0.0.2 (sic), which is no longer necessary.
855 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
856 be the same on different OS.
858 PH/09 Moved a debug statement in filter processing to avoid a race problem when
861 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
862 whether --show-vars was specified or not
864 JJ/02 exipick: Added support for new ACL variable spool format introduced
867 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
868 syntactically invalid From: or Reply-to: line, and a filter used this to
869 generate an autoreply, and therefore failed to obtain an address for the
870 autoreply, Exim could try to deliver to a non-existent relative file
871 name, causing unrelated and misleading errors. What now happens is that
872 it logs this as a hard delivery error, but does not attempt to create a
875 PH/11 The exinext utility has a -C option for testing purposes, but although
876 the given file was scanned by exinext itself; it wasn't being passed on
877 when Exim was called.
879 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
880 an end-of-file indication when reading a command response.
882 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
883 compiled. In many other places in Exim, IPv6 addresses are always
884 recognized, so I have changed this. It also means that IPv4 domain
885 literals of the form [IPV4:n.n.n.n] are now always recognized.
887 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
888 used if the router is not running as root, for example, when verifying at
889 ACL time, or when using -bh. The debugging output from this situation was
890 non-existent - all you got was a failure to exec. I have made two
893 (a) Failures to set uid/gid, the current directory, or a process leader
894 in a subprocess such as that created by queryprogram now generate
895 suitable debugging ouput when -d is set.
897 (b) The queryprogram router detects when it is not running as root,
898 outputs suitable debugging information if -d is set, and then runs
899 the subprocess without attempting to change uid/gid.
901 PH/15 Minor change to Makefile for building test_host (undocumented testing
904 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
905 additional section of a DNS packet that returns MX or SRV records.
906 Instead, it always explicitly searches for A/AAAA records. This avoids
907 major problems that occur when a DNS server includes only records of one
908 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
909 fixed another bug: if SRV records were looked up and the corresponding
910 address records were *not* found in the additional section, the port
911 values from the SRV records were lost.
913 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
914 using the correct key (the original address) when searching the retry
915 rules in order to find which one to use for generating the retry hint.
917 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
918 adding the default one. Similarly, if it contains a Reply-To: header, the
919 errors_reply_to option, if set, is not used.
921 PH/19 When calculating a retry time, Exim used to measure the "time since
922 failure" by looking at the "first failed" field in the retry record. Now
923 it does not use this if it is later than than the arrival time of the
924 message. Instead it uses the arrival time. This makes for better
925 behaviour in cases where some deliveries succeed, thus re-setting the
926 "first failed" field. An example is a quota failure for a huge message
927 when small messages continue to be delivered. Without this change, the
928 "time since failure" will always be short, possible causing more frequent
929 delivery attempts for the huge message than are intended.
930 [Note: This change was subsequently modified - see PH/04 for 4.62.]
932 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
933 $1, $2, $3) because the numerical variables can be reset during some
934 expansion items (e.g. "match"), thereby losing the authentication data.
936 PH/21 Make -bV show the size of off_t variables so that the test suite can
937 decide whether to run tests for quotas > 2G.
939 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
940 mailbox_size, and mailbox_filecount in the appendfile transport. If a
941 filecount value is greater than 2G or if a quota value is greater than 2G
942 on a system where the size of off_t is not greater than 4, a panic error
945 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
946 never match. The debug and -bh output now contains an explicit error
947 message indicating a malformed IPv4 address or mask.
949 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
950 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
953 PH/25 Do not write to syslog when running in the test harness. The only
954 occasion when this arises is a failure to open the main or panic logs
955 (for which there is an explicit test).
957 PH/26 Added the /no_tell option to "control=freeze".
959 PH/27 If a host name lookup failed very early in a connection, for example, if
960 the IP address matched host_lookup and the reverse lookup yielded a name
961 that did not have a forward lookup, an error message of the form "no IP
962 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
963 could be logged. Now it outputs the IP address instead of "NULL".
965 PH/28 An enabling patch from MH: add new function child_open_exim2() which
966 allows the sender and the authenticated sender to be set when
967 submitting a message from within Exim. Since child_open_exim() is
968 documented for local_scan(), the new function should be too.
970 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
971 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
972 results in an empty string is now treated as unset.
974 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
976 PH/31 Added sender_verify_fail logging option.
978 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
979 needed by RFC 822 but not by RFC 2822 was commented out. I have now
980 tidied the source and removed it altogether.
982 PH/33 When a queue run was abandoned because the load average was too high, a
983 log line was always written; now it is written only if the queue_run log
984 selector is set. In addition, the log line for abandonment now contains
985 information about the queue run such as the pid. This is always present
986 in "start" and "stop" lines but was omitted from the "abandon" line.
988 PH/34 Omit spaces between a header name and the colon in the error message that
989 is given when verify = headers_syntax fails (if there are lots of them,
990 the message gets confusing).
992 PH/35 Change the default for dns_check_names_pattern to allow slashes within
993 names, as there are now some PTR records that contain slashes. This check
994 is only to protect against broken name servers that fall over on strange
995 characters, so the fact that it applies to all lookups doesn't matter.
997 PH/36 Now that the new test suite is complete, we can remove some of the
998 special code in Exim that was needed for the old test suite. For example,
999 sorting DNS records because real resolvers return them in an arbitrary
1000 order. The new test suite's fake resolver always returns records in the
1003 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1004 bounces) except when queue_only is set, to avoid logging races between
1005 the different processes.
1007 PH/38 Panic-die if .include specifies a non-absolute path.
1009 PH/39 A tweak to the "H" retry rule from its user.
1011 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1012 a label. They prevented compilation on older perls.
1014 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1015 a warning to be raised on newish perls.
1017 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1018 on queue. Changes to match documented behaviour of showing count of
1019 messages matching specified criteria.
1021 PH/40 Changed the default ident timeout from 30s to 5s.
1023 PH/41 Added support for the use of login_cap features, on those BSD systems
1024 that have them, for controlling the resources used by pipe deliveries.
1026 PH/42 The content-scanning code uses fopen() to create files in which to put
1027 message data. Previously it was not paying any attention to the mode of
1028 the files. Exim runs with umask(0) because the rest of the code creates
1029 files with open(), and sets the required mode explicitly. Thus, these
1030 files were ending up world-writeable. This was not a big issue, because,
1031 being within the spool directory, they were not world-accessible. I have
1032 created a function called modefopen, which takes an additional mode
1033 argument. It sets umask(777), creates the file, chmods it to the required
1034 mode, then resets the umask. All the relevant calls to fopen() in the
1035 content scanning code have been changed to use this function.
1037 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1038 to 24 hours. This avoids potential overflow problems when processing G
1039 and H retry rules. I suspect nobody ever tinkers with this value.
1041 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1043 PH/45 When the plaintext authenticator is running as a client, the server's
1044 challenges are checked to ensure they are valid base64 strings. By
1045 default, the authentication attempt is cancelled if an invalid string is
1046 received. Setting client_ignore_invalid_base64 true ignores these errors.
1047 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1048 they are received. Thus, the responses can be made to depend on the
1049 challenges. If an invalid string is ignored, an empty string is placed in
1052 PH/46 Messages that are created by the autoreply transport now contains a
1053 References: header, in accordance with RFCs 2822 and 3834.
1055 PH/47 Added authenticated_sender_force to the smtp transport.
1057 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1059 PH/49 Installed latest patch from the Sieve maintainer.
1061 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1062 was also set, the appendfile transport was unnecessarily scanning a
1063 directory of message files (e.g. for maildir delivery) to find the count
1064 of files (along with the size), even though it did not need this
1065 information. It now does the scan only if it needs to find either the
1066 size of the count of files.
1068 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1070 PH/52 Two bugs concerned with error handling when the smtp transport is
1073 (i) Exim was not creating retry information for temporary errors given
1074 for individual recipients after the DATA command when the smtp transport
1075 was used in LMTP mode. This meant that they could be retried too
1076 frequently, and not timed out correctly.
1078 (ii) Exim was setting the flag that allows error details to be returned
1079 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1080 recipients that were returned after the DATA command.
1082 PH/53 This is related to PH/52, but is more general: for any failing address,
1083 when detailed error information was permitted to be returned to the
1084 sender, but the error was temporary, then after the final timeout, only
1085 "retry timeout exceeded" was returned. Now it returns the full error as
1086 well as "retry timeout exceeded".
1088 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1089 do this, and (what is worse) MTAs that accept it.
1091 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1092 will now be deprecated.
1094 PH/56 New os.c-cygwin from the Cygwin maintainer.
1096 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1097 formats (previously only available in exim formats via -bpr, -bpru,
1098 and -bpra. Now also available in native and exiqgrep formats)
1100 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1101 with very large, slow to parse queues
1103 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1105 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1107 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1108 responses to authentication challenges, though it was showing the
1109 challenges; (ii) I've removed the CR characters from the debug output for
1112 PH/58 Allow for the insertion of a newline as well as a space when a string
1113 is turned into more than one encoded-word during RFC 2047 encoding. The
1114 Sieve code now uses this.
1116 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1117 data_4xx, lost_connection, tls_required.
1119 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1120 message was being sent as an SMTP response.
1122 PH/61 Add -l and -k options to exicyclog.
1124 PH/62 When verifying, if an address was redirected to one new address, so that
1125 verification continued, and the new address failed or deferred after
1126 having set something in $address_data, the value of $address_data was not
1127 passed back to the ACL. This was different to the case when no
1128 redirection occurred. The value is now passed back in both cases.
1130 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1131 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1132 use login_cap.h, so on its own it isn't the distinguishing feature. The
1133 new name refers directly to the setclassresources() function.
1135 PH/65 Added configuration files for NetBSD3.
1137 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1139 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1140 is preferred over IPv4.
1142 PH/68 The bounce_return_message and bounce_return_body options were not being
1143 honoured for bounces generated during the reception of non-SMTP messages.
1144 In particular, this applied to messages rejected by the ACL. This bug has
1145 been fixed. However, if bounce_return_message is true and bounce_return_
1146 body is false, the headers that are returned for a non-SMTP message
1147 include only those that have been read before the error was detected.
1148 (In the case of an ACL rejection, they have all been read.)
1150 PH/69 The HTML version of the specification is now built in a directory called
1151 spec_html instead of spec.html, because the latter looks like a path with
1152 a MIME-type, and this confuses some software.
1154 PH/70 Catch two compiler warnings in sieve.c.
1156 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1157 function verify_get_ident() calls ip_connect() to connect a socket, but
1158 if the "connect()" function timed out, ip_connect() used to close the
1159 socket. However, verify_get_ident() also closes the socket later, and in
1160 between Exim writes to the log, which may get opened at this point. When
1161 the socket was closed in ip_connect(), the log could get the same file
1162 descriptor number as the socket. This naturally causes chaos. The fix is
1163 not to close the socket in ip_connect(); the socket should be closed by
1164 the function that creates it. There was only one place in the code where
1165 this was missing, in the iplookup router, which I don't think anybody now
1166 uses, but I've fixed it anyway.
1168 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1169 well as to direct DNS lookups. Otherwise the handling of names in host
1170 lists is inconsistent and therefore confusing.
1176 PH/01 Two changes to the default runtime configuration:
1178 (1) Move the checks for relay_from_hosts and authenticated clients from
1179 after to before the (commented out) DNS black list checks.
1181 (2) Add control=submission to the relay_from_hosts and authenticated
1182 clients checks, on the grounds that messages accepted by these
1183 statements are most likely to be submissions.
1185 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1187 (1) Generate an error if the third argument for the ${prvs expansion is
1190 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1193 (3) Reset the variables that are obtained from the first argument of
1194 ${prvscheck and used in the second argument before leaving the code,
1195 because their memory is reclaimed, so using them afterwards may do
1198 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1199 one (it's much easier than Tom thought :-).
1201 (5) Because of (4), we can now allow for the use of $prvscheck_result
1202 inside the third argument.
1204 PH/03 For some reason, the default setting of PATH when running a command from
1205 a pipe transport was just "/usr/bin". I have changed it to
1208 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1209 anything to be listed in the output from -bV.
1211 PH/05 When a filter generated an autoreply, the entire To: header line was
1212 quoted in the delivery log line, like this:
1214 => >A.N.Other <ano@some.domain> <original@ddress> ...
1216 This has been changed so that it extracts the operative address. There
1217 may be more than one such address. If so, they are comma-separated, like
1220 => >ano@some.domain,ona@other.domain <original@ddress> ...
1222 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1223 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1224 not being looked up in the rDNS to get a host name, Exim was showing the
1225 IP address twice in Received: lines, even though the IP addresses were
1226 identical. For example:
1228 Received: from [1.2.3.4] (helo=[1.2.3.4])
1230 However, if the real host name was known, it was omitting the HELO data
1231 if it matched the actual IP address. This has been tidied up so that it
1232 doesn't show the same IP address twice.
1234 PH/07 When both +timestamp and +memory debugging was on, the value given by
1235 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1236 called by the debug printing, thereby overwriting the timestamp buffer.
1237 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1239 PH/08 When the original message was included in an autoreply transport, it
1240 always said "this is a copy of the message, including all the headers",
1241 even if body_only or headers_only was set. It now gives an appropriate
1244 PH/09 Applied a patch from the Sieve maintainer which:
1246 o fixes some comments
1247 o adds the (disabled) notify extension core
1248 o adds some debug output for the result of if/elsif tests
1249 o points to the current vacation draft in the documentation
1250 and documents the missing references header update
1254 o fixes a bug in processing the envelope test (when testing
1255 multiple envelope elements, the last element determinted the
1258 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1259 Electronic Mail") by including:
1261 Auto-submitted: auto-generated
1263 in the messages that it generates (bounce messages and others, such as
1264 warnings). In the case of bounce messages for non-SMTP mesages, there was
1265 also a typo: it was using "Auto_submitted" (underscore instead of
1266 hyphen). Since every message generated by Exim is necessarily in response
1267 to another message, thes have all been changed to:
1269 Auto-Submitted: auto-replied
1271 in accordance with these statements in the RFC:
1273 The auto-replied keyword:
1275 - SHOULD be used on messages sent in direct response to another
1276 message by an automatic process,
1278 - MUST NOT be used on manually-generated messages,
1280 - MAY be used on Delivery Status Notifications (DSNs) and Message
1281 Disposition Notifications (MDNs),
1283 - MUST NOT be used on messages generated by automatic or periodic
1284 processes, except for messages which are automatic responses to
1287 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1288 to the default Received: header definition.
1290 PH/12 Added log selector acl_warn_skipped (default on).
1292 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1293 variables because (a) they are in the wrong storage pool and (b) even if
1294 they were copied, it wouldn't work properly because of the caching.
1296 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1297 checking when decoding. Apparently there are clients that generate
1298 overlong encoded strings. Why am I not surprised?
1300 PH/15 If the first argument of "${if match_address" was not empty, but did not
1301 contain an "@" character, Exim crashed. Now it writes a panic log message
1302 and treats the condition as false.
1304 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1306 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1307 extension "envelope-auth". The code is finished and in agreement with
1308 other implementations, but there is no documentation so far and in fact,
1309 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1310 not changing the active code.
1312 Print executed "if" and "elsif" statements when debugging is used. This
1313 helps a great deal to understand what a filter does.
1315 Document more things not specified clearly in RFC3028. I had all this
1316 sorted out, when out of a sudden new issues came to my mind. Oops."
1318 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1321 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1322 canonical form (as documented). However, after a host name lookup from
1323 the IP address, check_host() was doing a simple string comparison with
1324 addresses acquired from the DNS when checking that the found name did
1325 have the original IP as one of its addresses. Since any found IPv6
1326 addresses are likely to be in abbreviated form, the comparison could
1327 fail. Luckily, there already exists a function for doing the comparison
1328 by converting both addresses to binary, so now that is used instead of
1329 the text comparison.
1331 PH/20 There was another similar case to PH/19, when a complete host name was
1332 given in a host list; looking up its IP address could give an abbreviated
1333 form, whereas the current host's name might or might not be abbreviated.
1334 The same fix has been applied.
1340 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1341 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1344 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1345 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1347 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1349 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1350 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1351 Also, for "Auto-Submitted", treat anything other than "no" as
1352 non-personal, in accordance with RFC 3834. (Previously it treated
1353 anything starting "auto-" as non-personal.)
1355 TF/01 The control=submission/name=... option had a problem with syntax
1356 errors if the name included a slash character. The /name= option
1357 now slurps the rest of the string, so it can include any characters
1358 but it must come last in the list of options (after /sender_retain
1361 PH/05 Some modifications to the interface to the fake nameserver for the new
1369 TK/01 Added the "success_on_redirect" address verification option. See
1370 NewStuff for rationale and an example.
1372 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1374 PH/02 Patch to exigrep to allow it to work on syslog lines.
1376 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1377 fread() to skip over the body file's header line, because in Cygwin the
1378 header line is locked and is inaccessible.
1380 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1381 co-exist for some time) to make it clear that it is the Exim ID that is
1382 referenced, not the Message-ID: header line.
1384 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1385 string_format() function, because snprintf() does not exist on all
1388 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1389 ${stat: expansion item.
1391 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1392 protocol synchronization error", to keep the pedants happy.
1394 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1395 well as for IRIX systems, when gcc is being used. See the host.c source
1398 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1400 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1403 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1404 transport and to the smtp transport in LMTP mode.
1406 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1408 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1409 run a filter in a subprocess. This could lead to confusion in subsequent
1410 lookups in the parent process. There should also be a search_tidyup() at
1411 the end of the subprocess.
1413 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1414 only if the host matched helo_try_verify_hosts, which caused the
1415 verification to occur when the EHLO/HELO command was issued. The ACL just
1416 tested the remembered result. Now, if a previous verification attempt has
1417 not happened, "verify = helo" does it there and then.
1419 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1421 TK/03 Fix log output including CR from clamd.
1423 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1424 exist provoked a memory error which could cause a segfault.
1426 PH/15 Installed PCRE 6.2
1428 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1430 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1431 of the problem. Specifically, suggested +O2 rather than +O1 for the
1434 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1436 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1437 record, the port was not correctly logged when the outgoing_port log
1438 selector was set (it logged the transort's default port).
1440 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1441 fallback_hosts, and "hosts" in the smtp transport.
1443 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1444 host errors such as "Connection refused".
1446 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1447 authentication with radiusclient 0.4.9:
1449 - Error returned from rc_read_config was caught wrongly
1450 - Username/password not passed on to radius server due to wrong length.
1452 The presumption is that some radiusclient API changes for 4.51/PH/17
1453 were not taken care of correctly. The code is still untested by me (my
1454 Linux distribution still has 0.3.2 of radiusclient), but it was
1455 contributed by a Radius user.
1457 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1458 expanding the "port" option of the smtp transport.
1460 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1461 while reading a MIME header. Thanks to Tom Hughes for a patch.
1463 PH/24 Include config.h inside local_scan.h so that configuration settings are
1466 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1467 that in an ACL for RCPT (for example), you can examine exactly what was
1470 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1471 commands, but it was not correctly comparing the address with the actual
1472 client host address. Thus, it would show the EHLO address in Received:
1473 header lines when this was not necessary.
1475 PH/27 Added the % operator to ${eval:}.
1477 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1478 it should be ignoring failures (because with -C, for example, it has lost
1479 privilege). It wasn't ignoring creation failures other than "already
1482 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1485 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1486 because an input line was too long, either on its own, or by virtue of
1487 too many continuations, the temporary file was not being removed, and the
1488 return code was incorrect.
1490 PH/31 Missing "BOOL" in function definition in filtertest.c.
1492 PH/32 Applied Sieve patches from the maintainer.
1494 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1496 PH/33 Added "verify = not_blind".
1498 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1499 Local/Makefile (with some defaults set). These are used in built scripts
1500 such as exicyclog, but they have never been used in the exim_install
1501 script (though there are many overriding facilities there). I have
1502 arranged that the exim_install script now takes note of these two
1505 PH/35 Installed configuration files for Dragonfly.
1507 PH/36 When a locally submitted message by a trusted user did not contain a
1508 From: header, and the sender address was obtained from -f or from an SMTP
1509 MAIL command, and the trusted user did not use -F to supply a sender
1510 name, $originator_name was incorrectly used when constructing a From:
1511 header. Furthermore, $originator_name was used for submission mode
1512 messages from external hosts without From: headers in a similar way,
1513 which is clearly wrong.
1515 PH/37 Added control=suppress_local_fixups.
1517 PH/38 When log_selector = +received_sender was set, and the addition of the
1518 sender made the log line's construction buffer exactly full, or one byte
1519 less than full, an overflow happened when the terminating "\n" was
1522 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1523 when the result of a list match is failure because a DNS lookup failed.
1525 PH/40 RM_COMMAND is now used in the building process.
1527 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1528 the "build-* directories that it finds.
1530 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1531 address in a domain literal was a prefix of an interface address.
1533 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1534 when verifying a sender address, unless rewrite_headers is false.
1536 PH/44 Wrote a long comment about why errors_to addresses are verified as
1537 recipients, not senders.
1539 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1540 the ratelimit ACL was added.
1542 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1544 PH/46 Added extra information about PostgreSQL errors to the error string.
1546 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1547 avoiding the need to install special zones in a real server. This is
1548 backwards compatible; if it can't find the fake resolver, it drops back.
1549 Thus, both old and new test suites can be run.
1551 TF/02 Added util/ratelimit.pl
1553 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1554 clock is set back in time.
1556 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1557 Candler <B.Candler@pobox.com>.
1559 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1560 OK for addresses that are the result of redirections.
1562 PH/48 A number of further additions for the benefit of the new test suite,
1563 including a fake gethostbyname() that interfaces to the fake DNS resolver
1566 TF/06 The fix for widen_domains has also been applied to qualify_single and
1567 search_parents which are the other dnslookup options that can cause
1570 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1573 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1575 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1576 service" if it encountered an MX record with an empty target hostname.
1577 The message is now "an MX or SRV record indicated no SMTP service".
1579 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1580 if the DNS of the sending site is misconfigured. This is quite a
1581 common situation. This change restores the behaviour of treating a
1582 helo verification defer as a failure.
1584 PH/51 If self=fail was set on a router, the bounce message did not include the
1585 actual error message.
1591 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1593 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1594 command itself ended in error, the underlying message about the transport
1595 filter timeout was being overwritten with the pipe command error. Now the
1596 underlying error message should be appended to the second error message.
1598 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1600 PH/02 Reduce the amount of output that "make" produces by default. Full output
1601 can still be requested.
1603 PH/03 The warning log line about a condition test deferring for a "warn" verb
1604 was being output only once per connection, rather than after each
1605 occurrence (because it was using the same function as for successful
1606 "warn" verbs). This seems wrong, so I have changed it.
1608 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1609 it should not have, which might have caused a crash in the right
1610 circumstances, but probably never did.
1612 PH/04 Installed a modified version of Tony Finch's patch to make submission
1613 mode fix the return path as well as the Sender: header line, and to
1614 add a /name= option so that you can make the user's friendly name appear
1617 TF/03 Added the control = fakedefer ACL modifier.
1619 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1620 Mark Lowes for thorough testing.
1622 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1624 TK/03 Merged latest SRS patch from Miles Wilton.
1626 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1627 with the definition in sysexits.h (which is #included earlier).
1628 Fortunately, Exim does not actually use EX_OK. The code used to try to
1629 preserve the sysexits.h value, by assumimg that macro definitions were
1630 scanned for macro replacements. I have been disabused of this notion,
1631 so now the code just undefines EX_OK before #including unistd.h.
1633 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1634 in the smtp transport. When a block could not be written in a single
1635 write() function, the timeout was being re-applied to each part-write.
1636 This seems wrong - if the receiver was accepting one byte at a time it
1637 would take for ever. The timeout is now adjusted when this happens. It
1638 doesn't have to be particularly precise.
1640 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1641 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1643 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1644 without a domain if the check to <postmaster@domain> fails.
1646 SC/01 Eximstats: added -xls and the ability to specify output files
1647 (patch written by Frank Heydlauf).
1649 SC/02 Eximstats: use FileHandles for outputing results.
1651 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1653 SC/04 Eximstats: fixed display of large numbers with -nvr option
1655 SC/05 Eximstats: fixed merging of reports with empty tables.
1657 SC/06 Eximstats: added the -include_original_destination flag
1659 SC/07 Eximstats: removed tabs and trailing whitespace.
1661 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1663 TK/06 MBOX spool code: Add real "From " MBOX separator line
1664 so the .eml file is really in mbox format (even though
1665 most programs do not really care). Patch from Alex Miller.
1667 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1668 The latter is generated from $received_to and is only set if the
1669 message has one envelope recipient. SA can use these headers,
1670 obviously out-of-the-box. Patch from Alex Miller.
1672 PH/08 The ${def test on a variable was returning false if the variable's
1673 value was "0", contrary to what the specification has always said!
1674 The result should be true unless the variable is empty.
1676 PH/09 The syntax error of a character other than { following "${if
1677 def:variable_name" (after optional whitespace) was not being diagnosed.
1678 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1679 accidental colon was present, for example, could give incorrect results.
1681 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1682 result is used (not including appendfile, where other changes are about
1685 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1686 This involved changing a lot of size variables from int to off_t. It
1687 should work with maildirs and everything.
1689 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1690 spamd dying while we are connected to it.
1692 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1695 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1696 function for BDB 4.3.
1698 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1700 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1701 the sources for PCRE have been re-arranged and more files are now
1704 PH/15 The code I had for printing potentially long long variables in PH/11
1705 above was not the best (it lost precision). The length of off_t variables
1706 is now inspected at build time, and an appropriate printing format (%ld
1707 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1708 to be "long long int" or "long int". This is needed for the internal
1709 formatting function string_vformat().
1711 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1712 the configuration file to be ":syslog", then the script "guesses" where
1713 the logs files are, rather than using the compiled in default. In our
1714 case the guess is not the same as the compiled default, so the script
1715 suddenly stopped working when I started to use syslog. The patch checks
1716 to see if log_file_path is "". If so, it attempts to read it from exim
1717 with no configuration file to get the compiled in version, before it
1718 falls back to the previous guessing code."
1720 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1721 implementing BATV in an Exim configuration. See NewStuff for the gory
1724 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1725 Makefile that are specific to HP-UX.
1727 PH/18 If the "use_postmaster" option was set for a recipient callout together
1728 with the "random" option, the postmaster address was used as the MAIL
1729 FROM address for the random test, but not for the subsequent recipient
1730 test. It is now used for both.
1732 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1733 patch removes a few documentation additions to RFC 3028, because the
1734 latest draft now contains them. It adds the new en;ascii-case comparator
1735 and a new error check for 8bit text in MIME parts. Comparator and
1736 require names are now matched exactly. I enabled the subaddress
1737 extension, but it is not well tested yet (read: it works for me)."
1739 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1740 rework some of the code of TK/09 above to avoid the hardwired use of
1741 "%lld" and "long long". Replaced the call to snprintf() with a call to
1744 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1745 records point to non-existent hosts", "retry timeout exceeded", and
1746 "retry time not reached for any host after a long failure period".
1748 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1749 experimental DomainKeys support:
1751 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1752 (2) On an error such as an illegally used "control", the wrong name for
1753 the control was given.
1755 These problems did NOT occur unless DomainKeys support was compiled.
1757 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1759 PH/24 Added ${if match_ip condition.
1761 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1762 databases so that it will be absolutely obvious if a crash occurs in the
1763 DB library. This is a regular occurrence (often caused by mis-matched
1766 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1767 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1768 picked up on a user's system that detects such things. There doesn't seem
1769 to be a gcc warning option for this - only an attribute that has to be
1770 put on the function's prototype. It seems that in Fedora Core 4 they have
1771 set this on a number of new functions. No doubt there will be more in due
1774 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1775 specify a transport. However, if an address that was verified by such a
1776 router was the subject of a callout, Exim crashed because it tried to
1777 read the rcpt_include_affixes from the non-existent transport. Now it
1778 just assumes that the setting of that option is false. This bug was
1779 introduced by 4.51/PH/31.
1781 PH/28 Changed -d+all to exclude +memory, because that information is very
1782 rarely of interest, but it makes the output a lot bigger. People tend to
1783 do -d+all out of habit.
1785 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1786 code in os-type was giving problems when libc.so lives in lib64, like on
1789 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1790 aren't the modern standard, and it seems that some systems' include files
1791 don't always have them. Exim was already checking for some of the newer
1792 ones like T_AAAA, and defining it itself. I've added checks for all the
1793 record types that Exim uses.
1795 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1796 not automatically generating a new one, as it is supposed to. This
1797 prevented TLS from working. If the file did exist, but contained invalid
1798 data, a new version was generated, as expected. It was only the case of a
1799 non-existent file that was broken.
1801 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1802 with a change in libdomainkeys > 0.64.
1804 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1805 from DNS. If the selector record carries the flag, it now has
1806 precedence over the domain-wide flag.
1808 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1810 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1811 the use of a port name that isn't defined in /etc/services) occurred, the
1812 message was deferred as in a normal delivery, and thus remained on the
1813 spool, instead of being failed because of the mua_wrapper setting. This
1814 is now fixed, and I tidied up some of the mua_wrapper messages at the
1817 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1818 the messages in a hash of arrays rather than using individual hashes.
1819 This is a bit cleaner and results in dramatic memory savings, albeit
1820 at a slight CPU cost.
1822 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1823 as requested by Marc Sherman.
1825 SC/10 Eximstats: added histograms for user specified patterns as requested
1828 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1830 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1831 fopen() in the content-scanning modules that did not already have it.
1837 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1838 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1840 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1842 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1844 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1845 to test Sieve filters that use "vacation".
1847 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1848 that changes the way the GnuTLS parameters are stored in the cache file.
1849 The new format can be generated externally. For backward compatibility,
1850 if the data in the cache doesn't make sense, Exim assumes it has read an
1851 old-format file, and it generates new data and writes a new file. This
1852 means that you can't go back to an older release without removing the
1855 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1856 work if there are any delivery delays because "one_time" forces the
1857 parent to be marked "delivered", so its unseen clone is never tried
1858 again. For this reason, Exim now forbids the simultaneous setting of
1861 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1862 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1863 entry if you want to know the details. The fix, however, neglected to
1864 consider the case when local delivery batching is involved. The test for
1865 "previously delivered" was not happening when checking to see if an
1866 address could be batched with a previous (undelivered) one; under
1867 certain circumstances this could lead to multiple deliveries to the same
1870 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1871 in its include files, and this causes problems building Exim.
1873 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1874 header_syntax) but Exim was just ignoring anything given after a slash.
1875 In particular, this caused confusion with an attempt to use "verify =
1876 reverse_host_lookup/defer_ok". An error is now given when options are
1877 supplied for verify items that do not have them. (Maybe reverse_host_
1878 lookup should have a defer_ok option, but that's a different point.)
1880 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1881 defined by RFC 821) to 2048, because there were problems with some AUTH
1882 commands, and RFC 1869 says the size should be increased for extended
1883 SMTP commands that take arguments.
1885 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1888 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1889 "unknown" error; now it says that the functionality isn't in the binary.
1891 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1892 an address' error message when a string expansion fails (syntax or
1893 whatever). Otherwise the password may appear in the log. Following change
1894 PH/42 below, there is no longer a chance of it appearing in a bounce
1897 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1899 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1900 of its addresses was ever tried. (Bugzilla bug #2.)
1902 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1903 the result incorrectly in the debug output. (It correctly added a newline
1904 to what was transported.)
1906 TF/01 Added $received_time.
1908 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1909 commented out examples of how to interface to a virus scanner and to
1910 SpamAssassin. Also added commented examples of av_scanner and
1911 spamd_address settings.
1913 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1914 and controls are allowed in which ACLs. There were a couple of minor
1915 errors. Some of the entries in the conditions table (which is a table of
1916 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1917 negation of where the condition IS allowed.
1919 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1921 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1922 header file does not have a version number, so I've had to invent a new
1923 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1924 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1925 radiusclient), but it was contributed by a Radius user.
1927 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1928 files or directories, for OpenSSL.
1930 PH/19 When an Exim process that is running as root has to create an Exim log
1931 file, it does so in a subprocess that runs as exim:exim so as to get the
1932 ownership right at creation (otherwise, other Exim processes might see
1933 the file with the wrong ownership). There was no test for failure of this
1934 fork() call, which would lead to the process getting stuck as it waited
1935 for a non-existent subprocess. Forks do occasionally fail when resources
1936 run out. I reviewed all the other calls to fork(); they all seem to check
1939 PH/20 When checking for unexpected SMTP input at connect time (before writing
1940 the banner), Exim was not dealing correctly with a non-positive return
1941 from the read() function. If the client had disconnected by this time,
1942 the result was a log entry for a synchronization error with an empty
1943 string after "input=" when read() returned zero. If read() returned -1
1944 (an event I could not check), uninitialized data bytes were printed.
1945 There were reports of junk text (parts of files, etc) appearing after
1948 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1950 PH/22 Added support for macro redefinition, and (re)definition in between
1951 driver and ACL definitions.
1953 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1954 forgetting to use the resulting value; it was using the unexpanded value.
1956 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1957 hadn't been configured. The fix is from Juergen Kreileder, who
1958 understands it better than I do:
1960 "Here's what I see happening with three configured cyrus_sasl
1961 authenticators configured (plain, login, cram-md5):
1963 On startup auth_cyrus_sasl_init() gets called for each of these.
1964 This means three calls to sasl_listmech() without a specified mech_list.
1965 => SASL tests which mechs of all available mechs actually work
1966 => three warnings about OTP not working
1967 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1969 With the patch, sasl_listmech() also gets called three times. But now
1970 SASL's mech_list option is set to the server_mech specified in the the
1971 authenticator. Or in other words, the answer from sasl_listmech()
1972 gets limited to just the mech you're testing for (which is different
1974 => the return list contains just 'plain' or 'login', 'cram-md5' or
1975 nothing depending on the value of ob->server_mech.
1977 I've just tested the patch: Authentication still works fine,
1978 unavailable mechs specified in the exim configuration are still
1979 caught, and the auth.log warnings about OTP are gone."
1981 PH/25 When debugging is enabled, the contents of the command line are added
1982 to the debugging output, even when log_selector=+arguments is not
1985 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1986 answer is "GNU", and only if the return is "GNU/something" is the answer
1989 PH/27 $acl_verify_message is now set immediately after the failure of a
1990 verification in an ACL, and so is available in subsequent modifiers. In
1991 particular, the message can be preserved by coding like this:
1993 warn !verify = sender
1994 set acl_m0 = $acl_verify_message
1996 Previously, $acl_verify_message was set only while expanding "message"
1997 and "log_message" when a very denied access.
1999 PH/28 Modified OS/os.c-Linux with
2001 -#ifndef OS_LOAD_AVERAGE
2002 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2004 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2005 nomenclature these days.)
2007 PH/29 Installed patch from the Sieve maintainer that adds the options
2008 sieve_useraddress and sieve_subaddress to the redirect router.
2010 PH/30 In these circumstances:
2011 . Two addresses routed to the same list of hosts;
2012 . First host does not offer TLS;
2013 . First host accepts first address;
2014 . First host gives temporary error to second address;
2015 . Second host offers TLS and a TLS session is established;
2016 . Second host accepts second address.
2017 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2018 and peerdn, if requested) that were in fact used only for the second
2021 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2022 attention to any local part prefix or suffix that was matched by the
2023 router that accepted the address. It now behaves in the same way as it
2024 does for delivery: the affixes are removed from the local part unless
2025 rcpt_include_affixes is set on the transport.
2027 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2028 timeout during the DATA phase of an incoming message.
2030 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2031 applied a patch sanctioned by the Sieve maintainer.
2033 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2034 the uid or gid is negative. A case of a negative gid caused this to be
2035 noticed. The fix allows for either to be negative.
2037 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2038 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2041 PH/36 The change PH/12 above was broken. Fixed it.
2043 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2044 the grounds that routing the same address twice would always produce the
2045 same answer. This might have been true once, but it is certainly no
2046 longer true now. Routing a child address may depend on the previous
2047 routing that produced that child. Some complicated redirection strategies
2048 went wrong when messages had multiple recipients, and made Exim's
2049 behaviour dependent on the order in which the addresses were given.
2051 I have moved the duplicate checking until after the routing is complete.
2052 Exim scans the addresses that are assigned to local and remote
2053 transports, and removes any duplicates. This means that more work will be
2054 done, as duplicates will always all be routed, but duplicates are
2055 presumably rare, so I don't expect this is of any significance.
2057 For deliveries to pipes, files, and autoreplies, the duplicate checking
2058 still happens during the routing process, since they are not going to be
2061 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2062 It corrects a timeout issue with spamd. This is Ian's comment: "The
2063 background is that sometimes spamd either never reads data from a
2064 connection it has accepted, or it never writes response data. The exiscan
2065 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2066 blindly assumes that writes won't block so it may never time out."
2068 PH/39 Allow G after quota size as well as K and M.
2070 PH/40 The value set for $authenticated_id in an authenticator may not contain
2071 binary zeroes or newlines because the value is written to log lines and
2072 to spool files. There was no check on this. Now the value is run through
2073 the string_printing() function so that such characters are converted to
2074 printable escape sequences.
2076 PH/41 $message_linecount is a new variable that contains the total number of
2077 lines in the message. Compare $body_linecount, which is the count for the
2080 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2081 bounce and delay warning messages, except in certain special cases, which
2084 (a) An SMTP error message from a remote host;
2085 (b) A message specified in a :fail: redirection;
2086 (c) A message specified in a "fail" command in a system filter;
2087 (d) A message specified in a FAIL return from the queryprogram router;
2088 (e) A message specified by the cannot_route_message router option.
2090 In these cases only, Exim does include the error details in bounce and
2091 warning messages. There are also a few cases where bland messages such
2092 as "unrouteable address" or "local delivery error" are given.
2094 PH/43 $value is now also set for the "else" part of a ${run expansion.
2096 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2097 being worked on, but at least Exim now implements the latest version to
2100 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2101 process to complete was treated as a delivery failure, a timeout while
2102 writing the message to the pipe was logged, but erroneously treated as a
2103 successful delivery. Such timeouts include transport filter timeouts. For
2104 consistency with the overall process timeout, these timeouts are now
2105 treated as errors, giving rise to delivery failures by default. However,
2106 there is now a new Boolean option for the pipe transport called
2107 timeout_defer, which, if set TRUE, converts the failures into defers for
2108 both kinds of timeout. A transport filter timeout is now identified in
2111 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2112 systems where "make" and "gmake" are different, calling "gmake" at top
2113 level broke things. I've arranged for the value of $(MAKE) to be passed
2114 from the Makefile to this script so that it can call the same version of
2118 A note about Exim versions 4.44 and 4.50
2119 ----------------------------------------
2121 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2122 changes of various kinds. As a consequence, a big documentation update was
2123 needed. This delayed the release for rather longer than seemed good, especially
2124 in the light of a couple of (minor) security issues. Therefore, the changes
2125 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2126 release. So 4.44 and 4.50 are in effect two different branches that both start
2129 I have left the 4.50 change log unchanged; it contains all the changes since
2130 4.43. The change log for 4.44 is below; many of its items are identical to
2131 those for 4.50. This seems to be the most sensible way to preserve the
2132 historical information.
2138 1. Minor wording change to the doc/README.SIEVE file.
2140 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2141 computation of the current number of files was incorrect.
2143 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2144 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2147 4. Give more explanation in the error message when the command for a transport
2148 filter fails to execute.
2150 5. There are several places where Exim runs a non-Exim command in a
2151 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2152 was being done only for the command run by the queryprogram router. It is
2153 now done for all such subprocesses. The other cases are: ${run, transport
2154 filters, and the commands run by the lmtp and pipe transports.
2156 6. Added CONFIGURE_GROUP build-time option.
2158 7. Some older OS have a limit of 256 on the maximum number of file
2159 descriptors. Exim was using setrlimit() to set 1000 as a large value
2160 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2161 systems. I've change it so that if it can't get 1000, it tries for 256.
2163 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2164 was an oversight, and furthermore, ever since the addition of extra
2165 controls (e.g. 4.43/32), the checks on when to allow different forms of
2166 "control" were broken. There should now be diagnostics for all cases when a
2167 control that does not make sense is encountered.
2169 9. Added the /retain_sender option to "control=submission".
2171 10. $recipients is now available in the predata ACL (oversight).
2173 11. Tidy the search cache before the fork to do a delivery from a message
2174 received from the command line. Otherwise the child will trigger a lookup
2175 failure and thereby defer the delivery if it tries to use (for example) a
2176 cached ldap connection that the parent has called unbind on.
2178 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2179 of $address_data from the recipient verification was clobbered by the
2180 sender verification.
2182 13. The value of address_data from a sender verification is now available in
2183 $sender_address_data in subsequent conditions in the ACL statement.
2185 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2187 15. Added a new option "connect=<time>" to callout options, to set a different
2190 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2191 was its contents. (It was OK if the option was not defined at all.)
2193 17. A "Completed" log line is now written for messages that are removed from
2194 the spool by the -Mrm option.
2196 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2197 information about exactly what failed.
2199 19. Added -dd to debug only the daemon process.
2201 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2202 handles timeouts, both on the server side and network timeouts. Renamed the
2203 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2205 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2206 It is now set to "smtps".
2208 22. $host_address is now set to the target address during the checking of
2209 ignore_target_hosts.
2211 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2212 being passed; this would have caused $sender_host_name to have been used if
2213 matching the list had actually called for a host name (not very likely,
2214 since this list is usually IP addresses). A host name is now passed as
2217 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2218 code that specifies a non-restarting handler (typically sigaction() in
2219 modern systems) in an attempt to fix a rare and obscure crash bug.
2221 25. Narrowed the window for a race in the daemon that could cause it to ignore
2222 SIGCHLD signals. This is not a major problem, because they are used only to
2223 wake it up if nothing else does.
2225 26. A malformed maildirsize file could cause Exim to calculate negative values
2226 for the mailbox size or file count. Odd effects could occur as a result.
2227 The maildirsize information is now recalculated if the size or filecount
2230 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2231 support for a long time. Removed HAVE_SYS_VFS_H.
2233 28. Installed the latest version of exipick from John Jetmore.
2235 29. In an address list, if the pattern was not a regular expression, an empty
2236 subject address (from a bounce message) matched only if the pattern was an
2237 empty string. Non-empty patterns were not even tested. This was the wrong
2238 because it is perfectly reasonable to use an empty address as part of a
2239 database query. An empty address is now tested by patterns that are
2240 lookups. However, all the other forms of pattern expect the subject to
2241 contain a local part and a domain, and therefore, for them, an empty
2242 address still always fails if the pattern is not itself empty.
2244 30. Exim went into a mad DNS loop when attempting to do a callout where the
2245 host was specified on an smtp transport, and looking it up yielded more
2246 than one IP address.
2248 31. Re-factored the code for checking spool and log partition space into a
2249 function that finds that data and another that does the check. The former
2250 is then used to implement four new variables: $spool_space, $log_space,
2251 $spool_inodes, and $log_inodes.
2253 32. The RFC2047 encoding function was originally intended for short strings
2254 such as real names; it was not keeping to the 75-character limit for
2255 encoded words that the RFC imposes. It now respects the limit, and
2256 generates multiple encoded words if necessary. To be on the safe side, I
2257 have increased the buffer size for the ${rfc2047: expansion operator from
2260 33. It is now permitted to omit both strings after an "if" condition; if the
2261 condition is true, the result is "true". As before, when the second string
2262 is omitted, a false condition yields an empty string. This makes it less
2263 cumbersome to write custom ACL and router conditions.
2265 34. Failure to deliver a bounce message always caused it to be frozen, even if
2266 there was an errors_to setting on the router. The errors_to setting is now
2269 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2270 canonical form (fully expanded) before being placed in
2271 $sender_host_address.
2273 36. The table in the code that translates DNS record types into text (T_A to
2274 "A" for instance) was missing entries for NS and CNAME. It is just possible
2275 that this could have caused confusion if both these types were looked up
2276 for the same domain, because the text type is used as part of Exim's
2277 per-process caching. But the chance of anyone hitting this buglet seems
2280 37. The dnsdb lookup has been extended in a number of ways.
2282 (1) There is a new type, "zns", which walks up the domain tree until it
2283 finds some nameserver records. It should be used with care.
2285 (2) There is a new type, "mxh", which is like "mx" except that it returns
2286 just the host names, not the priorities.
2288 (3) It is now possible to give a list of domains (or IP addresses) to be
2289 looked up. The behaviour when one of the lookups defers can be
2290 controlled by a keyword.
2292 (4) It is now possible to specify the separator character for use when
2293 multiple records are returned.
2295 38. The dnslists ACL condition has been extended: it is now possible to supply
2296 a list of IP addresses and/or domains to be looked up in a particular DNS
2299 39. Added log_selector=+queue_time_overall.
2301 40. When running the queue in the test harness, wait just a tad after forking a
2302 delivery process, to get repeatability of debugging output.
2304 41. Include certificate and key file names in error message when GnuTLS fails
2305 to set them up, because the GnuTLS error message doesn't include the name
2306 of the failing file when there is a problem reading it.
2308 42. Allow both -bf and -bF in the same test run.
2310 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2312 44. The "Exiscan patch" is now merged into the mainline Exim source.
2314 45. Sometimes the final signoff response after QUIT could fail to get
2315 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2316 < 0 before doing a fflush(). This bug looks as though it goes back to the
2317 introduction of TLS in release 3.20, but "sometimes" must have been rare
2318 because the tests only now provoked it.
2320 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2321 (this can affect the format of dates).
2323 47. exim_tidydb, when checking for the continued existence of a message for
2324 which it has found a message-specific retry record, was not finding
2325 messages that were in split spool directories. Consequently, it was
2326 deleting retry records that should have stayed in existence.
2328 48. Steve fixed some bugs in eximstats.
2330 49. The SPA authentication driver was not abandoning authentication and moving
2331 on to the next authenticator when an expansion was forced to fail,
2332 contradicting the general specification for all authenticators. Instead it
2333 was generating a temporary error. It now behaves as specified.
2335 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2336 (the order specifies the preference for clients). The order is now AES256,
2337 AES128, 3DES, ARCFOUR128.
2339 51. Small patch to Sieve code - explicitly set From: when generating an
2342 52. Exim crashed if a remote delivery caused a very long error message to be
2343 recorded - for instance if somebody sent an entire SpamAssassin report back
2344 as a large number of 550 error lines. This bug was coincidentally fixed by
2345 increasing the size of one of Exim's internal buffers (big_buffer) that
2346 happened as part of the Exiscan merge. However, to be on the safe side, I
2347 have made the code more robust (and fixed the comments that describe what
2350 53. Now that there can be additional text after "Completed" in log lines (if
2351 the queue_time_overall log selector is set), a one-byte patch to exigrep
2352 was needed to allow it to recognize "Completed" as not the last thing in
2355 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2356 patch that reportedly fixes this has been added. I am not expert enough to
2357 create a test for it. This is what the patch creator wrote:
2359 "I found a little strange behaviour of ldap code when working with
2360 Windows 2003 AD Domain, where users was placed in more than one
2361 Organization Units. When I tried to give exim partial DN, the exit code
2362 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2363 But simultaneously result of request was absolutely normal ldap result,
2364 so I produce this patch..."
2366 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2367 REFERENCE, so I have modified the code to exclude the patch when that macro
2370 55. Some experimental protocols are using DNS PTR records for new purposes. The
2371 keys for these records are domain names, not reversed IP addresses. The
2372 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2373 leaves it alone. Component reversal etc. now happens only for IP addresses.
2376 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2378 57. Double the size of the debug message buffer (to 2048) so that more of very
2379 long debug lines gets shown.
2381 58. The exicyclog utility now does better if the number of log files to keep
2382 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2384 59. Two changes related to the smtp_active_hostname option:
2386 (1) $smtp_active_hostname is now available as a variable.
2387 (2) The default for smtp_banner uses $smtp_active_hostname instead
2388 of $primary_hostname.
2390 60. The host_aton() function is supposed to be passed a string that is known
2391 to be a valid IP address. However, in the case of IPv6 addresses, it was
2392 not checking this. This is a hostage to fortune. Exim now panics and dies
2393 if the condition is not met. A case was found where this could be provoked
2394 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2395 components; fortuitously, this particular loophole had already been fixed
2396 by change 4.50/55 above.
2398 If there are any other similar loopholes, the new check in host_aton()
2399 itself should stop them being exploited. The report I received stated that
2400 data on the command line could provoke the exploit when Exim was running as
2401 exim, but did not say which command line option was involved. All I could
2402 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2403 running as the user.
2406 61. There was a buffer overflow vulnerability in the SPA authentication code
2407 (which came originally from the Samba project). I have added a test to the
2408 spa_base64_to_bits() function which I hope fixes it.
2411 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2412 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2414 63. The daemon start-up calls getloadavg() while still root for those OS that
2415 need the first call to be done as root, but it missed one case: when
2416 deliver_queue_load_max is set with deliver_drop_privilege. This is
2417 necessary for the benefit of the queue runner, because there is no re-exec
2418 when deliver_drop_privilege is set.
2420 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2421 This has been fixed.
2423 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2424 was in use, was not putting the data itself into the right store pool;
2425 consequently, it could be overwritten for a subsequent message in the same
2426 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2429 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2431 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2432 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2433 the function were treating the return as a boolean value, which happened to
2434 work because 0=false and not-0=true, but is not correct code.
2436 68. The host_aton() function was not handling scoped IPv6 addresses (those
2437 with, for example, "%eth0" on the end) correctly.
2439 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2440 negated items (that is, ~something) in unsigned ints. Some compilers
2441 apparently mutter when there is no cast.
2443 70. If an address verification called from an ACL failed, and did not produce a
2444 user-specific message (i.e. there was only a "system" message), nothing was
2445 put in $acl_verify_message. In this situation, it now puts the system
2448 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2449 session; change 4.31/43 added the unwanted input to the log line - except
2450 that it did not do this in the start of session case. It now does.
2452 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2453 This is wrong and can cause the other end to generate a synchronization
2454 error if it is another Exim or anything else that does the synchronization
2455 check. A QUIT command is no longer sent after a timeout.
2457 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2458 during host lookups.
2460 74. The defer_ok option of callout verification was not working if it was used
2461 when verifying addresses in header lines, that is, for this case:
2463 verify = header_sender/callout=defer_ok
2465 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2466 those file descriptors could be used for SMTP connections. If anything
2467 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2468 could be sent to the SMTP client, causing chaos. The daemon now opens
2469 stdin, stdout, and stderr to /dev/null when it puts itself into the
2472 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2473 log by default. The user can override this with suitable Perl magic.
2475 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2476 the log message when discard triggers, was not working for the DATA ACL or
2477 for the non-SMTP ACL.
2479 78. Error message wording change in sieve.c.
2481 79. If smtp_accept_max_per_host was set, the number of connections could be
2482 restricted to fewer than expected, because the daemon was trying to set up
2483 a new connection before checking whether the processes handling previous
2484 connections had finished. The check for completed processes is now done
2485 earlier. On busy systems, this bug wouldn't be noticed because something
2486 else would have woken the daemon, and it would have reaped the completed
2489 80. If a message was submitted locally by a user whose login name contained one
2490 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2491 It caused a spool format error. I have fixed the spool reading code. A
2492 related problem was that the "from" clause in the Received: line became
2493 illegal because of the space(s). It is now covered by ${quote_local_part.
2495 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2498 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2500 83. Patch from Sieve maintainer to fix unterminated string problem in
2501 "vacation" handling.
2503 84. Some minor changes to the Linux configuration files to help with other
2504 OS variants using glibc.
2506 85. One more patch for Sieve to update vacation handling to latest spec.
2509 ----------------------------------------------------
2510 See the note above about the 4.44 and 4.50 releases.
2511 ----------------------------------------------------
2517 1. Change 4.43/35 introduced a bug that caused file counts to be
2518 incorrectly computed when quota_filecount was set in an appendfile
2521 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2522 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2525 3. Give more explanation in the error message when the command for a transport
2526 filter fails to execute.
2528 4. There are several places where Exim runs a non-Exim command in a
2529 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2530 was being done only for the command run by the queryprogram router. It is
2531 now done for all such subprocesses. The other cases are: ${run, transport
2532 filters, and the commands run by the lmtp and pipe transports.
2534 5. Some older OS have a limit of 256 on the maximum number of file
2535 descriptors. Exim was using setrlimit() to set 1000 as a large value
2536 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2537 systems. I've change it so that if it can't get 1000, it tries for 256.
2539 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2540 was an oversight, and furthermore, ever since the addition of extra
2541 controls (e.g. 4.43/32), the checks on when to allow different forms of
2542 "control" were broken. There should now be diagnostics for all cases when a
2543 control that does not make sense is encountered.
2545 7. $recipients is now available in the predata ACL (oversight).
2547 8. Tidy the search cache before the fork to do a delivery from a message
2548 received from the command line. Otherwise the child will trigger a lookup
2549 failure and thereby defer the delivery if it tries to use (for example) a
2550 cached ldap connection that the parent has called unbind on.
2552 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2553 of $address_data from the recipient verification was clobbered by the
2554 sender verification.
2556 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2557 was its contents. (It was OK if the option was not defined at all.)
2559 11. A "Completed" log line is now written for messages that are removed from
2560 the spool by the -Mrm option.
2562 12. $host_address is now set to the target address during the checking of
2563 ignore_target_hosts.
2565 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2566 being passed; this would have caused $sender_host_name to have been used if
2567 matching the list had actually called for a host name (not very likely,
2568 since this list is usually IP addresses). A host name is now passed as
2571 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2572 code that specifies a non-restarting handler (typically sigaction() in
2573 modern systems) in an attempt to fix a rare and obscure crash bug.
2575 15. Narrowed the window for a race in the daemon that could cause it to ignore
2576 SIGCHLD signals. This is not a major problem, because they are used only to
2577 wake it up if nothing else does.
2579 16. A malformed maildirsize file could cause Exim to calculate negative values
2580 for the mailbox size or file count. Odd effects could occur as a result.
2581 The maildirsize information is now recalculated if the size or filecount
2584 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2585 support for a long time. Removed HAVE_SYS_VFS_H.
2587 18. Updated exipick to current release from John Jetmore.
2589 19. Allow an empty sender to be matched against a lookup in an address list.
2590 Previously the only cases considered were a regular expression, or an
2593 20. Exim went into a mad DNS lookup loop when doing a callout where the
2594 host was specified on the transport, if the DNS lookup yielded more than
2597 21. The RFC2047 encoding function was originally intended for short strings
2598 such as real names; it was not keeping to the 75-character limit for
2599 encoded words that the RFC imposes. It now respects the limit, and
2600 generates multiple encoded words if necessary. To be on the safe side, I
2601 have increased the buffer size for the ${rfc2047: expansion operator from
2604 22. Failure to deliver a bounce message always caused it to be frozen, even if
2605 there was an errors_to setting on the router. The errors_to setting is now
2608 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2609 canonical form (fully expanded) before being placed in
2610 $sender_host_address.
2612 24. Updated eximstats to version 1.33
2614 25. Include certificate and key file names in error message when GnuTLS fails
2615 to set them up, because the GnuTLS error message doesn't include the name
2616 of the failing file when there is a problem reading it.
2618 26. Expand error message when OpenSSL has problems setting up cert/key files.
2621 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2622 (this can affect the format of dates).
2624 28. exim_tidydb, when checking for the continued existence of a message for
2625 which it has found a message-specific retry record, was not finding
2626 messages that were in split spool directories. Consequently, it was
2627 deleting retry records that should have stayed in existence.
2629 29. eximstats updated to version 1.35
2630 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2631 1.35 - bugfix such that pie charts by volume are generated correctly
2633 30. The SPA authentication driver was not abandoning authentication and moving
2634 on to the next authenticator when an expansion was forced to fail,
2635 contradicting the general specification for all authenticators. Instead it
2636 was generating a temporary error. It now behaves as specified.
2638 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2639 (the order specifies the preference for clients). The order is now AES256,
2640 AES128, 3DES, ARCFOUR128.
2642 31. Small patch to Sieve code - explicitly set From: when generating an
2645 32. Exim crashed if a remote delivery caused a very long error message to be
2646 recorded - for instance if somebody sent an entire SpamAssassin report back
2647 as a large number of 550 error lines. This bug was coincidentally fixed by
2648 increasing the size of one of Exim's internal buffers (big_buffer) that
2649 happened as part of the Exiscan merge. However, to be on the safe side, I
2650 have made the code more robust (and fixed the comments that describe what
2653 33. Some experimental protocols are using DNS PTR records for new purposes. The
2654 keys for these records are domain names, not reversed IP addresses. The
2655 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2656 leaves it alone. Component reversal etc. now happens only for IP addresses.
2659 34. The host_aton() function is supposed to be passed a string that is known
2660 to be a valid IP address. However, in the case of IPv6 addresses, it was
2661 not checking this. This is a hostage to fortune. Exim now panics and dies
2662 if the condition is not met. A case was found where this could be provoked
2663 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2664 components; fortuitously, this particular loophole had already been fixed
2665 by change 4.50/55 or 4.44/33 above.
2667 If there are any other similar loopholes, the new check in host_aton()
2668 itself should stop them being exploited. The report I received stated that
2669 data on the command line could provoke the exploit when Exim was running as
2670 exim, but did not say which command line option was involved. All I could
2671 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2672 running as the user.
2675 35. There was a buffer overflow vulnerability in the SPA authentication code
2676 (which came originally from the Samba project). I have added a test to the
2677 spa_base64_to_bits() function which I hope fixes it.
2680 36. The daemon start-up calls getloadavg() while still root for those OS that
2681 need the first call to be done as root, but it missed one case: when
2682 deliver_queue_load_max is set with deliver_drop_privilege. This is
2683 necessary for the benefit of the queue runner, because there is no re-exec
2684 when deliver_drop_privilege is set.
2686 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2687 was in use, was not putting the data itself into the right store pool;
2688 consequently, it could be overwritten for a subsequent message in the same
2689 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2692 38. Sometimes the final signoff response after QUIT could fail to get
2693 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2694 < 0 before doing a fflush(). This bug looks as though it goes back to the
2695 introduction of TLS in release 3.20, but "sometimes" must have been rare
2696 because the tests only now provoked it.
2702 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2703 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2704 Now it returns an integer. A number of calls were still expecting a T/F
2705 return. Fortuitously, in all cases, the tests worked in OK situations,
2706 which is the norm. However, things would have gone wrong on any write
2707 failures on the smtp file descriptor. This function is used when sending
2708 messages over SMTP and also when doing verify callouts.
2710 2. When Exim is called to do synchronous delivery of a locally submitted
2711 message (the -odf or -odi options), it no longer closes stderr before doing
2714 3. Implemented the mua_wrapper option.
2716 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2718 5. Implemented the functions header_remove(), header_testname(),
2719 header_add_at_position(), and receive_remove_recipient(), and exported them
2722 6. If an ACL "warn" statement specified the addition of headers, Exim already
2723 inserted X-ACL-Warn: at the start if there was no header name. However, it
2724 was not making this test for the second and subsequent header lines if
2725 there were newlines in the string. This meant that an invalid header could
2726 be inserted if Exim was badly configured.
2728 7. Allow an ACL "warn" statement to add header lines at the start or after all
2729 the Received: headers, as well as at the end.
2731 8. Added the rcpt_4xx retry error code.
2733 9. Added postmaster_mailfrom=xxx to callout verification option.
2735 10. Added mailfrom=xxxx to the callout verification option, for verify=
2738 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2739 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2741 12. Inserted some casts to stop certain compilers warning when using pointer
2742 differences as field lengths or precisions in printf-type calls (mostly
2743 affecting debugging statements).
2745 13. Added optional readline() support for -be (dynamically loaded).
2747 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2748 same clock tick as a message's arrival, so that its received time was the
2749 same as the "first fail" time on the retry record, and that message
2750 remained on the queue past the ultimate address timeout, every queue runner
2751 would try a delivery (because it was past the ultimate address timeout) but
2752 after another failure, the ultimate address timeout, which should have then
2753 bounced the address, did not kick in. This was a "< instead of <=" error;
2754 in most cases the first failure would have been in the next clock tick
2755 after the received time, and all would be well.
2757 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2758 being recognized when the domain list was tested by the match_domain
2759 condition in an expansion string.
2761 16. Added the ${str2b64: operator.
2763 17. Exim was always calling setrlimit() to set a large limit for the number of
2764 processes, without checking whether the existing limit was already
2765 adequate. (It did check for the limit on file descriptors.) Furthermore,
2766 errors from getrlimit() and setrlimit() were being ignored. Now they are
2767 logged to the main and panic logs, but Exim does carry on, to try to do its
2768 job under whatever limits there are.
2770 18. Imported PCRE 5.0.
2772 19. Trivial typo in log message " temporarily refused connection" (the leading
2775 20. If the log selector return_path_on_delivery was set and an address was
2776 redirected to /dev/null, the delivery process crashed because it assumed
2777 that a return path would always be set for a "successful" delivery. In this
2778 case, the whole delivery is bypassed as an optimization, and therefore no
2781 21. Internal re-arrangement: the function for sending a challenge and reading
2782 a response while authentication was assuming a zero-terminated challenge
2783 string. It's now changed to take a pointer and a length, to allow for
2784 binary data in such strings.
2786 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2788 23. Exim was not respecting finduser_retries when seeking the login of the
2789 uid under which it was called; it was always trying 10 times. (The default
2790 setting of finduser_retries is zero.) Also, it was sleeping after the final
2791 failure, which is pointless.
2793 24. Implemented tls_on_connect_ports.
2795 25. Implemented acl_smtp_predata.
2797 26. If the domain in control=submission is set empty, Exim assumes that the
2798 authenticated id is a complete email address when it generates From: or
2799 Sender: header lines.
2801 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2802 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2803 chown and chgrp in /bin and hostname in /usr/bin.
2805 28. Exim was keeping the "process log" file open after each use, just as it
2806 does for the main log. This opens the possibility of it remaining open for
2807 long periods when the USR1 signal hits a daemon. Occasional processlog
2808 errors were reported, that could have been caused by this. Anyway, it seems
2809 much more sensible not to leave this file open at all, so that is what now
2812 29. The long-running daemon process does not normally write to the log once it
2813 has entered its main loop, and it closes the log before doing so. This is
2814 so that log files can straightforwardly be renamed and moved. However,
2815 there are a couple of unusual error situations where the daemon does write
2816 log entries, and I had neglected to close the log afterwards.
2818 30. The text of an SMTP error response that was received during a remote
2819 delivery was being truncated at 512 bytes. This is too short for some of
2820 the long messages that one sometimes sees. I've increased the limit to
2823 31. It is now possible to make retry rules that apply only when a message has a
2824 specific sender, in particular, an empty sender.
2826 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2827 it possible to be selective about when SMTP synchronization is enforced.
2829 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2831 32. Implemented hosts_connection_nolog.
2833 33. Added an ACL for QUIT.
2835 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2838 35. Added mailbox_size and mailbox_filecount to appendfile.
2840 36. Added control = no_multiline_responses to ACLs.
2842 37. There was a bug in the logic of the code that waits for the clock to tick
2843 in the case where the clock went backwards by a substantial amount such
2844 that the microsecond fraction of "now" was more than the microsecond
2845 fraction of "then" (but the whole seconds number was less).
2847 38. Added support for the libradius Radius client library this is found on
2848 FreeBSD (previously only the radiusclient library was supported).
2854 1. When certain lookups returned multiple values in the form name=value, the
2855 quoting of the values was not always being done properly. Specifically:
2856 (a) If the value started with a double quote, but contained no whitespace,
2858 (b) If the value contained whitespace other than a space character (i.e.
2859 tabs or newlines or carriage returns) it was not quoted.
2860 This fix has been applied to the mysql and pgsql lookups by writing a
2861 separate quoting function and calling it from the lookup code. The fix
2862 should probably also be applied to nisplus, ibase and oracle lookups, but
2863 since I cannot test any of those, I have not disturbed their existing code.
2865 2. A hit in the callout cache for a specific address caused a log line with no
2866 reason for rejecting RCPT. Now it says "Previous (cached) callout
2867 verification failure".
2869 3. There was an off-by-one bug in the queryprogram router. An over-long
2870 return line was truncated at 256 instead of 255 characters, thereby
2871 overflowing its buffer with the terminating zero. As well as fixing this, I
2872 have increased the buffer size to 1024 (and made a note to document this).
2874 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2875 when Exim is waiting for an SMTP response from a remote server, Exim
2876 restarts its select() call on the socket, thereby resetting its timeout.
2877 This is not a problem when such interrupts are rare. Somebody set up a cron
2878 job to run exiwhat every 2 minutes, which is less than the normal select()
2879 timeout (5 or 10 minutes). This meant that the select() timeout never
2880 kicked in because it was always reset. I have fixed this by comparing the
2881 time when an interrupt arrives with the time at the start of the first call
2882 to select(). If more time than the timeout has elapsed, the interrupt is
2883 treated as a timeout.
2885 5. Some internal re-factoring in preparation for the addition of Sieve
2886 extensions (by MH). In particular, the "personal" test is moved to a
2887 separate function, and given an option for scanning Cc: and Bcc: (which is
2888 not set for Exim filters).
2890 6. When Exim created an email address using the login of the caller as the
2891 local part (e.g. when creating a From: or Sender: header line), it was not
2892 quoting the local part when it contained special characters such as @.
2894 7. Installed new OpenBSD configuration files.
2896 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2897 try to make them clearer.
2899 9. Callout options, other than the timeout value, were being ignored when
2900 verifying sender addresses in header lines. For example, when using
2902 verify = header_sender/callout=no_cache
2904 the cache was (incorrectly) being used.
2906 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2907 only the Cygwin environment.
2909 11. When return_path_on_delivery was set as a log selector, if different remote
2910 addresses in the same message used different return paths and parallel
2911 remote delivery occurred, the wrong values would sometimes be logged.
2912 (Whenever a remote delivery process finished, the return path value from
2913 the most recently started remote delivery process was logged.)
2915 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2916 lines when AUTH and/or TLS are in use. This is the "received protocol"
2917 field. Exim used to use "asmtp" for authenticated SMTP, without any
2918 indication (in the protocol name) for TLS use. Now it follows the RFC and
2919 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2920 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2921 names appear in log lines as well as in Received: header lines.
2923 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2924 extensions, and comparison tests, and to fix some bugs.
2926 14. Changes to the "personal" filter test:
2928 (1) The test was buggy in that it was just doing the equivalent of
2929 "contains" tests on header lines. For example, if a user's address was
2930 anne@some.where, the "personal" test would incorrectly be true for
2932 To: susanne@some.where
2934 This test is now done by extracting each address from the header in turn,
2935 and checking the entire address. Other tests that are part of "personal"
2936 are now done using regular expressions (for example, to check local parts
2937 of addresses in From: header lines).
2939 (2) The list of non-personal local parts in From: addresses has been
2940 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2941 taken from the Sieve specification recommendations.
2943 (3) If the message contains any header line starting with "List-" it is
2944 treated as non-personal.
2946 (4) The test for "circular" in the Subject: header line has been removed
2947 because it now seems ill-conceived.
2949 15. Minor typos in src/EDITME comments corrected.
2951 16. Installed latest exipick from John Jetmore.
2953 17. If headers_add on a router specified a text string that was too long for
2954 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2955 of string_sprintf() is now avoided.
2957 18. $message_body_size was not set (it was always zero) when running the DATA
2958 ACL and the local_scan() function.
2960 19. For the "mail" command in an Exim filter, no default was being set for
2961 the once_repeat time, causing a random time value to be used if "once" was
2962 specified. (If the value happened to be <= 0, no repeat happened.) The
2963 default is now 0s, meaning "never repeat". The "vacation" command was OK
2964 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2965 (I found it when inspecting the code).
2967 20. There is now an overall timeout for performing a callout verification. It
2968 defaults to 4 times the callout timeout, which applies to individual SMTP
2969 commands during the callout. The overall timeout applies when there is more
2970 than one host that can be tried. The timeout is checked before trying the
2971 next host. This prevents very long delays if there are a large number of
2972 hosts and all are timing out (e.g. when the network connections are timing
2973 out). The value of the overall timeout can be changed by specifying an
2974 additional sub-option for "callout", called "maxwait". For example:
2976 verify = sender/callout=5s,maxwait=20s
2978 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2979 to the end before writing, but this should make it even safer).
2981 22. Exim was forgetting that it had advertised PIPELINING for the second and
2982 subsequent messages on an SMTP connection. It was also not resetting its
2983 memory on STARTTLS and an internal HELO.
2985 23. When Exim logs an SMTP synchronization error within a session, it now
2986 records whether PIPELINING has been advertised or not.
2988 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2989 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2990 rather than long int.
2992 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2994 26. Added the never_mail option to autoreply.
3000 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3001 crash if the getsockname() call failed; this can happen if a connection is
3002 closed very soon after it is established. The problem was simply in the
3003 order in which certain operations were done, causing Exim to try to write
3004 to the SMTP stream before it had set up the file descriptor. The bug has
3005 been fixed by making things happen in the correct order.
3011 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3012 before the connection was closed, thus losing the rejection response.
3014 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3015 some early Solaris releases, but causes trouble in current releases where
3016 socklen_t is defined.
3018 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3021 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3024 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3025 that releasing the top of it at the end releases what was used for sub-
3026 expansions (unless the block got too big). However, discard this block if
3027 the first thing is a variable or header, so that we can use its block when
3028 it is dynamic (useful for very large $message_headers, for example).
3030 6. Lookups now cache *every* query, not just the most recent. A new, separate
3031 store pool is used for this. It can be recovered when all lookup caches are
3032 flushed. Lookups now release memory at the end of their result strings.
3033 This has involved some general refactoring of the lookup sources.
3035 7. Some code has been added to the store_xxx() functions to reduce the amount
3036 of flapping under certain conditions.
3038 8. log_incoming_interface used to affect only the <= reception log lines. Now
3039 it causes the local interface and port to be added to several more SMTP log
3040 lines, for example "SMTP connection from", and rejection lines.
3042 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3044 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3046 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3047 could be overwritten at the end of the current message (or the start of a
3048 new message if it was set in a HELO ACL). The value is now preserved for
3049 the duration of the SMTP connection.
3051 12. If a transport had a headers_rewrite setting, and a matching header line
3052 contained an unqualified address, that address was qualified, even if it
3053 did not match any rewriting rules. The underlying bug was that the values
3054 of the flags that permit the existence of unqualified sender and recipient
3055 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3056 non-local messages, and by -bnq for local messages) were not being
3057 preserved with the message after it was received.
3059 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3060 "next input=" as part of the text comprising the host identity instead of
3061 the correct text. The code was using the same buffer for two different
3062 strings. However, depending on which order the printing function evaluated
3063 its arguments, the bug did not always show up. Under Linux, for example, my
3064 test suite worked just fine.
3066 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3067 doesn't work with some older versions of Perl. It has been changed to "my",
3068 which in any case is probably the better facility to use.
3070 15. A really picky compiler found some instances of statements for creating
3071 error messages that either had too many or two few arguments for the format
3074 16. The size of the buffer for calls to the DNS resolver has been increased
3075 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3076 for addresses that have a lot of PTR records. This alleviates a problem; it
3077 does not fully solve it.
3079 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3080 buffer now truncates the list and logs the incident, which is the same
3081 action as happens when Exim is looking up a host name and its aliases.
3082 Previously in this situation something unpredictable would happen;
3083 sometimes it was "internal error: store_reset failed".
3085 18. If a server dropped the connection unexpectedly when an Exim client was
3086 using GnuTLS and trying to read a response, the client delivery process
3087 crashed while trying to generate an error log message.
3089 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3090 string, for example:
3092 warn message = H1: something\nH2: something
3094 the text was added as a single header line from Exim's point of view
3095 though it ended up OK in the delivered message. However, searching for the
3096 second and subsequent header lines using $h_h2: did not work. This has been
3097 fixed. Similarly, if a system filter added multiple headers in this way,
3098 the routers could not see them.
3100 20. Expanded the error message when iplsearch is called with an invalid key to
3101 suggest using net-iplsearch in a host list.
3103 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3104 ACLs are no longer actually imposed (and a message to that effect is
3107 22. If a "gecos" field in a passwd entry contained escaped characters, in
3108 particular, if it contained a \" sequence, Exim got it wrong when building
3109 a From: or a Sender: header from that name. A second bug also caused
3110 incorrect handling when an unquoted " was present following a character
3111 that needed quoting.
3113 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3114 was not being matched caselessly.
3116 24. Arranged for all hyphens in the exim.8 source to be escaped with
3119 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3120 properly. Recipient callout cache records were still being keyed to include
3121 the sender, even when use_sender was set false. This led to far more
3122 callouts that were necessary. The sender is no longer included in the key
3123 when use_sender is false.
3125 26. Added "control = submission" modifier to ACLs.
3127 27. Added the ${base62d: operator to decode base 62 numbers.
3129 28. dnsdb lookups can now access SRV records.
3131 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3132 the configuration file.
3134 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3135 (-v) mode. This makes the output for a verbose queue run more intelligible.
3137 31. Added a use_postmaster feature to recipient callouts.
3139 32. Added the $body_zerocount variable, containing the number of binary zero
3140 bytes in the message body.
3142 33. The time of last modification of the "new" subdirectory is now used as the
3143 "mailbox time last read" when there is a quota error for a maildir
3146 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3148 35. Added +ignore_unknown as a special item in host lists.
3150 36. Code for decoding IPv6 addresses in host lists is now included, even if
3151 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3152 address was recognized as an IP address, but was then not correctly decoded
3153 into binary, causing unexpected and incorrect effects when compared with
3160 1. Very minor rewording of debugging text in manualroute to say "list of
3161 hosts" instead of "hostlist".
3163 2. If verify=header_syntax was set, and a header line with an unqualified
3164 address (no domain) and a large number of spaces between the end of the
3165 name and the colon was received, the reception process suffered a buffer
3166 overflow, and (when I tested it) crashed. This was caused by some obsolete
3167 code that should have been removed. The fix is to remove it!
3169 3. When running in the test harness, delay a bit after writing a bounce
3170 message to get a bit more predictability in the log output.
3172 4. Added a call to search_tidyup() just before forking a reception process. In
3173 theory, someone could use a lookup in the expansion of smtp_accept_max_
3174 per_host which, without the tidyup, could leave open a database connection.
3176 5. Added the variables $recipient_data and $sender_data which get set from a
3177 lookup success in an ACL "recipients" or "senders" condition, or a router
3178 "senders" option, similar to $domain_data and $local_part_data.
3180 6. Moved the writing of debug_print from before to after the "senders" test
3183 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3184 problems for message scanning, either using a data ACL, or using
3185 local_scan() because the Received: header was not generated till after they
3186 were called (in order to set the time as the time of reception completion).
3187 I have revised the way this works. The header is now generated after the
3188 body is received, but before the ACL or local_scan() are called. After they
3189 are run, the timestamp in the header is updated.
3195 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3196 before starting a queue runner without re-exec. This happened only when
3197 deliver_drop_privilege was set or when the Exim user was set to root. The
3198 effect of the bug was that timeouts during subsequent deliveries caused
3199 crashes instead of being properly handled. The handler is now left at its
3200 default (and expected) setting.
3202 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3203 message, again when deliver_drop_privilege is set or Exim is run as root.
3204 The bug described in (1) was not present in this case, but the tidying up
3205 of the other signals was missing. I have made the two cases consistent.
3207 3. The ignore_target_hosts setting on a manualroute router was being ignored
3208 for hosts that were looked up using the /MX notation.
3210 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3213 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3214 operated on the sender address. After changing the $sender_address to <>
3215 for the sender address verify, Exim was re-instated it as the original
3216 (before rewriting) address, but remembering that it had rewritten it, so it
3217 wasn't rewriting it again. This bug also had the effect of breaking the
3218 sender address verification caching when the sender address was rewritten.
3220 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3221 This has been changed so that if the ip literal address matches
3222 ignore_target_hosts, the router declines.
3224 7. Added expansion conditions match_domain, match_address, and match_local_
3225 part (NOT match_host).
3227 8. The placeholder for the Received: header didn't have a length field set.
3229 9. Added code to Exim itself and to exim_lock to test for a specific race
3230 condition that could lead to file corruption when using MBX delivery. The
3231 issue is with the lockfile that is created in /tmp. If this file is removed
3232 after a process has opened it but before that process has acquired a lock,
3233 there is the potential for a second process to recreate the file and also
3234 acquire a lock. This could lead to two Exim processes writing to the file
3235 at the same time. The added code performs the same test as UW imapd; it
3236 checks after acquiring the lock that its file descriptor still refers to
3237 the same named file.
3239 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3240 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3243 11. Added the smtp_active_hostname option. If used, this will typically be made
3244 to depend on the incoming interface address. Because $interface_address is
3245 not set up until the daemon has forked a reception process, error responses
3246 that can happen earlier (such as "too many connections") no longer contain
3249 12. If an expansion in a condition on a "warn" statement fails because a lookup
3250 defers, the "warn" statement is abandoned, and the next ACL statement is
3251 processed. Previously this caused the whole ACL to be aborted.
3253 13. Added the iplsearch lookup type.
3255 14. Added ident_timeout as a log selector.
3257 15. Added tls_certificate_verified as a log selector.
3259 16. Added a global option tls_require_ciphers (compare the smtp transport
3260 option of the same name). This controls incoming TLS connections.
3262 17. I finally figured out how to make tls_require_ciphers do a similar thing
3263 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3264 before starting the TLS session.
3266 18. Tabs are now shown as \t in -bP output.
3268 19. If the log selector return_path_on_delivery was set, Exim crashed when
3269 bouncing a message because it had too many Received: header lines.
3271 20. If two routers both had headers_remove settings, and the first one included
3272 a superfluous trailing colon, the final name in the first list and the
3273 first name in the second list were incorrectly joined into one item (with a
3274 colon in the middle).
3280 1. Added -C and -D options to the exinext utility, mainly to make it easier
3281 to include in the automated testing, but these could be helpful when
3282 multiple configurations are in use.
3284 2. The exinext utility was not formatting the output nicely when there was
3285 an alternate port involved in the retry record key, nor when there was a
3286 message id as well (for retries that were specific to a specific message
3287 and a specific host). It was also confused by IPv6 addresses, because of
3288 the additional colons they contain. I have fixed the IPv4 problem, and
3289 patched it up to do a reasonable job for IPv6.
3291 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3292 delivery, the log line now contains "pipelined" if PIPELINING was used.
3294 4. An SMTP transport process used to panic and die if the bind() call to set
3295 an explicit outgoing interface failed. This has been changed; it is now
3296 treated in the same way as a connect() failure.
3298 5. A reference to $sender_host_name in the part of a conditional expansion
3299 that was being skipped was still causing a DNS lookup. This no longer
3302 6. The def: expansion condition was not recognizing references to header lines
3303 that used bh_ and bheader_.
3305 7. Added the _cache feature to named lists.
3307 8. The code for checking quota_filecount in the appendfile transport was
3308 allowing one more file than it should have been.
3310 9. For compatibility with Sendmail, the command line option
3318 and sets the incoming protocol and host name (for trusted callers). The
3319 host name and its colon can be omitted when only the protocol is to be set.
3320 Note the Exim already has two private options, -pd and -ps, that refer to
3321 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3322 "s", but I don't think that's a major issue.
3324 10. A number of refactoring changes to the code, none of which should affect
3327 (a) The number of logging options was getting close to filling up the
3328 32-bit word that was used as a bit map. I have split them into two classes:
3329 those that are passed in the argument to log_write(), and those that are
3330 only ever tested independently outside of that function. These are now in
3331 separate 32-bit words, so there is plenty of room for expansion again.
3332 There is no change in the user interface or the logging behaviour.
3334 (b) When building, for example, log lines, the code previously used a
3335 macro that called string_cat() twice, in order to add two strings. This is
3336 not really sufficiently general. Furthermore, there was one instance where
3337 it was actually wrong because one of the argument was used twice, and in
3338 one call a function was used. (As it happened, calling the function twice
3339 did not affect the overall behaviour.) The macro has been replaced by a
3340 function that can join an arbitrary number of extra strings onto a growing
3343 (c) The code for expansion conditions now uses a table and a binary chop
3344 instead of a serial search (which was left over from when there were very
3345 few conditions). Also, it now recognizes conditions like "pam" even when
3346 the relevant support is not compiled in: a suitably worded error message is
3347 given if an attempt is made to use such a condition.
3349 11. Added ${time_interval:xxxxx}.
3351 12. A bug was causing one of the ddress fields not to be passed back correctly
3352 from remote delivery subprocesses. The field in question was not being
3353 subsequently used, so this caused to problems in practice.
3355 13. Added new log selectors queue_time and deliver_time.
3357 14. Might have fixed a bug in maildirsizefile handling that threw up
3358 "unexpected character" debug warnings, and recalculated the data
3359 unnecessarily. In any case, I expanded the warning message to give more
3362 15. Added the message "Restricted characters in address" to the statements in
3363 the default ACL that block characters like @ and % in local parts.
3365 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3366 Three changes have been made:
3368 (a) There was a serious bug; a negative response to MAIL caused the whole
3369 recipient domain to be cached as invalid, thereby blocking all messages
3370 to all local parts at the same domain, from all senders. This bug has
3371 been fixed. The domain is no longer cached after a negative response to
3372 MAIL if the sender used is not empty.
3374 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3377 (c) A new callout option, "use_sender" has been added for people who want
3378 the modified behaviour.
3384 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3387 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3388 indeed breaks things for older releases.
3390 3. Added additional logging to the case where there is a problem reading data
3391 from a filter that is running in a subprocess using a pipe, in order to
3392 try to track down a specific problem.
3394 4. Testing facility fudge: when running in the test harness and attempting
3395 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3396 getting "No route to host". Convert this to a timeout.
3398 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3401 6. Some OS don't have socklen_t but use size_t instead. This affects the
3402 fifth argument of getsockopt() amongst other things. This is now
3403 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3404 can be set for individual OS. I have set it for SunOS5, OSF1, and
3405 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3406 some earlier ones do not.
3408 7. Change 4.30/15 was not doing the test caselessly.
3410 8. The standard form for an IPv6 address literal was being rejected by address
3411 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3412 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3413 this, as well as the form without the "IPv6" on the front (but only when
3414 address literals are enabled, of course).
3416 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3418 10. Exim crashed if a message with an empty sender address specified by -f
3419 encountered a router with an errors_to setting. This could be provoked only
3420 by a command such as
3424 where an empty string was supplied; "<>" did not hit this bug.
3426 11. Installed PCRE release 4.5.
3428 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3429 remained set. It is now erased.
3431 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3432 times from message ids (which are base 36 rather than the normal 62).
3434 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3435 were being counted as actual protocol errors, and logged if the log
3436 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3437 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3438 and DATA following a set of rejected RCPTs do not count as protocol errors.
3439 In other words, Exim assumes they were pipelined, though this may not
3440 actually be the case. Of course, in all cases the client gets an
3441 appropriate error code.
3443 15. If a lookup fails in an ACL condition, a message about the failure may
3444 be available; it is used if testing the ACL cannot continue, because most
3445 such messages specify what the cause of the deferral is. However, some
3446 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3447 that caused an old message to be retained and used if a later statement
3448 caused a defer, replacing the real cause of the deferral.
3450 16. If an IP address had so many PTR records that the DNS lookup buffer
3451 was not large enough to hold them, Exim could crash while trying to process
3452 the truncated data. It now detects and logs this case.
3454 17. Further to 4.21/58, another change has been made: if (and only if) the
3455 first line of a message (the first header line) ends with CRLF, a bare LF
3456 in a subsequent header line has a space inserted after it, so as not to
3457 terminate the header.
3459 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3460 unnecessarily, used atoi() instead of strtol(), and didn't check the
3461 termination when getting file sizes from file names by regex.
3463 19. Completely re-implemented the support for maildirsize files, in the light
3464 of a number of problems with the previous contributed implementation
3465 (4.30/29). In particular:
3467 . If the quota is zero, the maildirsize file is maintained, but no quota is
3470 . If the maildir directory does not exist, it is created before any attempt
3471 to write a maildirsize file.
3473 . The quota value in the file is just a cache; if the quota is changed in
3474 the transport, the new value overrides.
3476 . A regular expression is available for excluding directories from the
3479 20. The autoreply transport checks the characters in options that define the
3480 message's headers; it allows continued headers, but it was checking with
3481 isspace() after an embedded newline instead of explicitly looking for a
3484 21. If all the "regular" hosts to which an address was routed had passed their
3485 expiry times, and had not reached their retry times, the address was
3486 bounced, even if fallback hosts were defined. Now Exim should go on to try
3489 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3490 equivalent code in the SMTP transport. Some hosts send humungous responses
3491 to HELO/EHLO, more than 1024 it seems.
3493 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3494 gives compiler warnings in some environments. I've now done it "properly",
3497 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3498 (because of problems with the built-in one) was declared to return uschar *
3499 instead of char *, causing compiler failure.
3501 25. Fixed a file descriptor leak when processing alias/forward files.
3503 26. Fixed a minor format string issue in dbfn.c.
3505 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3507 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3508 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3511 29. When a sender address is verified, it is cached, to save repeating the test
3512 when there is more than one recipient in a message. However, when the
3513 verification involves a callout, it is possible for different callout
3514 options to be set for different recipients. It is too complicated to keep
3515 track of this in the cache, so now Exim always runs a verification when a
3516 callout is required, relying on the callout cache for the optimization.
3517 The overhead is duplication of the address routing, but this should not be
3520 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3521 to be verified with callout=postmaster, and the main callout worked but the
3522 postmaster check failed, the verification correctly failed. However, if a
3523 subsequent RCPT command asked for sender verification *without* the
3524 postmaster check, incorrect caching caused this verification also to fail,
3527 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3528 it was not caching the DNS options (qualify_single, search_parents) that
3529 were used when the lookup failed. A subsequent lookup with different
3530 options therefore always gave the same answer, though there were cases
3531 where it should not have. (Example: a "domains = !$mx_any" option on a
3532 dnslookup router: the "domains" option is always processed without any
3533 widening, but the router might have qualify_single set.) Now Exim uses the
3534 cached value only when the same options are set.
3536 32. Added John Jetmore's "exipick" utility to the distribution.
3538 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3539 than a timeout (e.g. a certificate is required, and is not provided), an
3540 Exim server now closes the connection immediately. Previously it waited for
3541 the client to close - but if the client is SSL, it seems that they each
3542 wait for each other, leading to a delay before one of them times out.
3544 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3545 maintained 0.8.x compatibility because I don't think many are using it, and
3546 it is clearly obsolete.
3548 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3551 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3552 client certificate was expired. A simple patch fixes this, though I don't
3553 understand the full logic of why the verify callback is called multiple
3556 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3557 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3558 which causes problems with some clients (such as the Certicom SSL Plus
3559 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3560 disables the coutermeasure allowing Eudora to connect."
3562 38. Exim was not checking that a write() to a log file succeeded. This could
3563 lead to Bad Things if a log got too big, in particular if it hit a file
3564 size limit. Exim now panics and dies if it cannot write to a log file, just
3565 as it does if it cannot open a log file.
3567 39. Modified OS/Makefile-Linux so that it now contains
3569 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3571 The two -D definitions ensure that Exim is compiled with large file
3572 support, which makes it possible to handle log files that are bigger than
3575 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3576 instance) a domain was checked against a named list that involved a lookup,
3577 causing $domain_data to be set, then another domain was checked against the
3578 same list, then the first domain was re-checked, the value of $domain_data
3579 after the final check could be wrong. In particular, if the second check
3580 failed, it could be set empty. This bug probably also applied to
3583 41. The strip_trailing_dot option was not being applied to the address given
3584 with the -f command-line option.
3586 42. The code for reading a message's header from the spool was incrementing
3587 $received_count, but never initializing it. This meant that the value was
3588 incorrect (doubled) while delivering a message in the same process in which
3589 it was received. In the most common configuration of Exim, this never
3590 happens - a fresh exec is done - but it can happen when
3591 deliver_drop_privilege is set.
3593 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3594 it now includes up to 150 characters of the unexpected data in the log
3597 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3598 and building data strings. The size of both of these buffers was 10 000
3599 bytes - far larger than anybody would *ever* want, thought I. Needless to
3600 say, somebody hit the limit. I have increased the maximum line length to
3601 20 000 and the maximum data length of concatenated lines to 100 000. I have
3602 also fixed two bugs, because there was no checking on these buffers. Tsk,
3603 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3604 buffer is too small.
3606 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3607 lsearch lookups. Now it does.
3609 46. When parsing a route_list item in a manualroute router, a fixed-length
3610 buffer was used for the list of hosts. I made this 1024 bytes long,
3611 thinking that nobody would ever have a list of hosts that long. Wrong.
3612 Somebody had a whole pile of complicated expansion conditions, and the
3613 string was silently truncated, leading to an expansion error. It turns out
3614 that it is easier to change to an unlimited length (owing to other changes
3615 that have happened since this code was originally written) than to build
3616 structure for giving a limitation error. The length of the item that
3617 expands into the list of hosts is now unlimited.
3619 47. The lsearch lookup could not handle data where the length of text line was
3620 more than 4095 characters. Such lines were truncated, leading to shortened
3621 data being returned. It should now handle lines of any length.
3623 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3624 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3627 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3628 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3629 no longer happens in comment lines. A list of replacements is now placed
3630 at the head of all of the source files, except those whose only change is
3631 to replace PERL_COMMAND in the very first #! line.
3633 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3634 messages on the queue, with a bottom-up merge sort, using code contributed
3635 by Michael Haardt. This should make operations like -bp somewhat faster on
3636 large queues. It won't affect queue runners, except when queue_run_in_order
3639 51. Installed eximstats 1.31 in the distribution.
3641 52. Added support for SRV lookups to the dnslookup router.
3643 53. If an ACL referred to $message_body or $message_body_end, the value was not
3644 reset for any messages that followed in the same SMTP session.
3646 54. The store-handling optimization for building very long strings was not
3647 differentiating between the different store pools. I don't think this
3648 actually made any difference in practice, but I've tidied it.
3650 55. While running the routers to verify a sender address, $sender_address
3651 was still set to the sender address. This is wrong, because when routing to
3652 send a bounce to the sender, it would be empty. Therefore, I have changed
3653 it so that, while verifying a sender address, $sender_address is set to <>.
3654 (There is no change to what happens when verifying a recipient address.)
3656 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3657 target A or AAAA records (if not already returned) without resetting the
3658 qualify_single or search_parents options of the DNS resolver. These are
3659 inappropriate in this case because the targets of MX and SRV records must
3660 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3661 target that, when qualified, matched something in the local domain. These
3662 two options are now turned off when doing these lookups.
3664 57. It seems that at least some releases of Reiserfs (which does not have the
3665 concept of a fixed number of inodes) returns zero and not -1 for the
3666 number of available inodes. This interacted badly with check_spool_inodes,
3667 which assumed that -1 was the "no such thing" setting. What I have done is
3668 to check that the total number of inodes is greater than zero before doing
3669 the test of how many are available.
3671 58. When a "warn" ACL statement has a log_message modifier, the message is
3672 remembered, and not repeated. This is to avoid a lot of repetition when a
3673 message has many recipients that cause the same warning to be written.
3674 Howewer, Exim was preserving the list of already written lines for an
3675 entire SMTP session, which doesn't seem right. The memory is now reset if a
3676 new message is started.
3678 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3679 debugging output unless log_rewrite was also set.
3681 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3682 of (int)(handle) when we know that handle contains (void *)(-1).
3684 61. The Exim daemon panic-logs an error return when it closes the incoming
3685 connection. However "connection reset by peer" seems to be common, and
3686 isn't really an error worthy of noting specially, so that particular error
3689 62. When Exim is trying to find all the local interfaces, it used to panic and
3690 die if the ioctl to get the interface flags failed. However, it seems that
3691 on at least one OS (Solaris 9) it is possible to have an interface that is
3692 included in the list of interfaces, but for which you get a failure error
3693 for this call. This happens when the interface is not "plumbed" into a
3694 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3695 failure of the "get flags" call assumes that the interface is down.
3697 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3698 makes life easier for people who are doing arithmetic on fields extracted
3699 from dates, where you often get leading zeros that should not be
3700 interpreted as octal.
3702 64. Added qualify_domain to the redirect router, to override the global
3705 65. If a pathologically long header line contained very many addresses (the
3706 report of this problem mentioned 10 000) and each of them was rewritten,
3707 Exim could use up a very large amount of memory. (It kept on making new
3708 copies of the header line as it rewrote, and never released the old ones.)
3709 At the expense of a bit more processing, the header rewriting function has
3710 been changed so that it no longer eats memory in this way.
3712 66. The generation of the Received: header has been moved from the time that a
3713 message starts to be received, to the time that it finishes. The timestamp
3714 in the Received: header should now be very close to that of the <= log
3715 line. There are two side-effects of this change:
3717 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3718 logged header lines no longer include the local Received: line, because
3719 it has not yet been created. The same applies to a copy of the message
3720 that is returned to a non-SMTP sender when a message is rejected.
3722 (b) When a filter file is tested using -bf, no additional Received: header
3723 is added to the test message. After some thought, I decided that this
3726 This change does not affect the value of $received_for. It is still set
3727 after address rewriting, but before local_scan() is called.
3729 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3731 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3732 gave an unhelpful panic error message, and a defer error. I have managed to
3733 change this behaviour so that it now rejects any supplied certificate,
3734 which seems right, as the list of acceptable certificates is empty.
3736 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3737 gave an unhelpful defer error. I have not managed to make this reject any
3738 supplied certificates, but the error message it gives is "no certificate
3739 supplied", which is not helpful.
3741 70. exigrep's output now also includes lines that are not associated with any
3742 message, but which match the given pattern. Implemented by a patch from
3743 Martin Sluka, which also tidied up the Perl a bit.
3745 71. Recipient callout verification, like sender verification, was using <> in
3746 the MAIL FROM command. This isn't really the right thing, since the actual
3747 sender may affect whether the remote host accepts the recipient or not. I
3748 have changed it to use the actual sender in the callout; this means that
3749 the cache record is now keyed on a recipient/sender pair, not just the
3750 recipient address. There doesn't seem to be a real danger of callout loops,
3751 since a callout by the remote host to check the sender would use <>.
3752 [SEE ABOVE: changed after hitting problems.]
3754 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3755 temporary errors. However, in the case of such a code being given after
3756 the end of a data transmission (i.e. after ".") Exim was failing to write
3757 a retry record for the message. (Yes, there was some broken host that was
3758 actually sending 8xx at this point.)
3760 73. An unknown lookup type in a host list could cause Exim to panic-die when
3761 the list was checked. (An example that provoked this was putting <; in the
3762 middle of a list instead of at the start.) If this happened during a DATA
3763 ACL check, a -D file could be left lying around. This kind of configuration
3764 error no longer causes Exim to die; instead it causes a defer errror. The
3765 incident is still logged to the main and panic logs.
3767 74. Buglet left over from Exim 3 conversion. The message "too many messages
3768 in one connection" was written to the rejectlog but not the mainlog, except
3769 when address rewriting (yes!) was being logged.
3771 75. Added write_rejectlog option.
3773 76. When a system filter was run not as root (that is, when system_filter_user
3774 was set), the values of the $n variables were not being returned to the
3775 main process; thus, they were not subsequently available in the $sn
3778 77. Added +return_path_on_delivery log selector.
3780 78. A connection timeout was being treated differently from recipients deferred
3781 when testing hosts_max_try with a message that was older than the host's
3782 retry timeout. (The host should not be counted, thus allowing all hosts to
3783 be tried at least once before bouncing.) This may have been the cause of an
3784 occasionally reported bug whereby a message would remain on the queue
3785 longer than the retry timeout, but would be bounced if a delivery was
3786 forced. I say "may" because I never totally pinned down the problem;
3787 setting up timeout/retry tests is difficult. See also the next item.
3789 79. The ultimate address timeout was not being applied to errors that involved
3790 a combination of host plus message (for example, a timeout on a MAIL
3791 command). When an address resolved to a number of possible hosts, and they
3792 were not all tried for each delivery (e.g. because of hosts_max_try), a
3793 message could remain on the queue longer than the retry timeout.
3795 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3798 81. Fixed an obscure SMTP outgoing bug which required at least the following
3799 conditions: (a) there was another message waiting for the same server;
3800 (b) the server returned 5xx to all RCPT commands in the first message so
3801 that the message was not completed; (c) the server dropped the connection
3802 or gave a negative response to the RSET that Exim sends to abort the
3803 transaction. The observed case was a dropped connection after DATA that had
3804 been sent in pipelining mode. That is, the server had advertised PIPELINING
3805 but was not implementing it correctly. The effect of the bug was incorrect
3806 behaviour, such as trying another host, and this could lead to a crash.
3812 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3813 and daemon.c were passed as pointers to ints; they should have been
3814 pointers to socklen_t variables (which are typically unsigned ints).
3816 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3819 3. Fixed a really odd bug that affected only the testing scheme; patching a
3820 certain fixed string in the binary changed the value of another string that
3821 happened to be identical to the end of the original first string.
3823 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3824 name", it returns that address as the IP address. On some operating
3825 systems (e.g. Solaris), it also passes back the IP address string as the
3826 "host name". However, on others (e.g. Linux), it passes back an empty
3827 string. Exim wasn't checking for this, and was changing the host name to an
3828 empty string, assuming it had been canonicized.
3830 5. Although rare, it is permitted to have more than one PTR record for a given
3831 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3832 all the names associated with an address, because they do in Solaris.
3833 However, it seems that they do not in Linux for data that comes from the
3834 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3835 I found this out when I moved to a new Linux workstation and tried to run
3836 the Exim test suite.
3838 To get round this problem I have changed the code so that it now does its
3839 own call to the DNS to look up PTR records when searching for a host name.
3840 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3841 addresses that are only in /etc/hosts are still found.
3843 This behaviour is, however, controlled by an option called host_lookup_
3844 order, which defaults to "bydns:byaddr". If people want to use the other
3845 order, or indeed, just use one or the other means of lookup, they can
3846 specify it in this variable.
3848 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3849 some operating systems, this comes back from gethostbyaddr() as an empty
3850 string, and this is what Exim used to test for. However, it seems that in
3851 other systems, "." is yielded. Exim now tests for this case too.
3853 7. The values of check_spool_space and check_log_space are now held internally
3854 as a number of kilobytes instead of an absolute number of bytes. If a
3855 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3856 kilobyte. This means that much larger values can be stored.
3858 8. Exim monitor: an attempt to get the action menu when not actually pointing
3859 at a message produces an empty menu entitled "No message selected". This
3860 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3861 no entries in it ("Shell widget menu has zero width and/or height"). So I
3862 have added a single, blank menu entry in this case.
3864 9. Added ${quote_local_part.
3866 10. MIME decoding is now applied to the contents of Subject: header lines when
3869 11. Now that a reference to $sender_host_address automatically causes a reverse
3870 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3871 host lookup before query-style lookups in lists that might use this
3872 variable. This has therefore been abolished, and the "net-" prefix is no
3873 longer necessary for query-style lookups.
3875 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3876 have been a typo for LFLAGS, so it has been changed.
3878 13. The install script calls Exim with "-C /dev/null" in order to find the
3879 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3880 to be output. Howeve, since Exim outputs its version number before the
3881 error, it didn't break the script. It just looked ugly. I fixed this by
3882 always allowing "-C /dev/null" if the caller is root.
3884 14. Ignore overlarge ACL variable number when reading spool file - insurance
3885 against a later release with more variables having written the file.
3887 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3888 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3889 this, as well as the form without the "IPv6" on the front.
3891 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3892 OS/Makefile-Darwin file.
3894 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3895 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3897 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3898 variable. However, some OS use ints for inodes. I've added cast to long int
3899 to get rid of the compiler warning.
3901 19. I had forgotten to lock out "/../" in configuration file names when
3902 ALT_CONFIG_PREFIX was set.
3904 20. Routers used for verification do not need to specify transports. However,
3905 if such a router generated a host list, and callout was configured, Exim
3906 crashed, because it could not find a port number from the (non-existent)
3907 transport. It now assumes port 25 in this circumstance.
3909 21. Added the -t option to exigrep.
3911 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3912 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3913 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3914 them is set, LOOKUP_LSEARCH is forced.
3916 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3918 24. Added sender and host information to the "rejected by local_scan()" log
3919 line; previously there was no indication of these.
3921 25. Added .include_if_exists.
3923 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3924 Linux. It turns out that not all file systems support this. Apparently some
3925 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3926 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3927 not supported on the file descriptor, is now ignored when Exim is trying to
3928 sync a directory. This applies only to Linux.
3930 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3932 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3933 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3936 29. Added support for maildirsize files from supplied patch (modified a bit).
3938 30. The use of :fail: followed by an empty string could lead Exim to respond to
3939 sender verification failures with (e.g.):
3941 550 Verification failed for <xxx>
3942 550 Sender verify failed
3944 where the first response line was missing the '-' that indicates it is not
3945 the final line of the response.
3947 31. The loop for finding the name of the user that called Exim had a hardwired
3948 limit of 10; it now uses the value of finduser_retries, which is used for
3949 all other user lookups.
3951 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3954 33. Exim was neglecting to zero errno before one call of strtol() when
3955 expanding a string and expecting an integer value. On some systems this
3956 resulted in spurious "integer overflow" errors. Also, it was casting the
3957 result into an int without checking.
3959 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3960 did not work. The code looks as if it has *never* worked, though it appears
3961 to have been documented since at least releast 1.62. I have made it work.
3963 35. The "timeout_DNS" error in retry rules, also documented since at least
3964 1.62, also never worked. As it isn't clear exactly what this means, and
3965 clearly it isn't a major issue, I have abolished the feature by treating it
3966 as "timeout", and writing a warning to the main and panic logs.
3968 36. The display of retry rules for -brt wasn't always showing the error code
3971 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3972 timeout_connect_A, timeout_connect_MX.
3974 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3975 to the empty sender.
3977 39. The daemon was not analysing the content of -oX till after it had closed
3978 stderr and disconnected from the controlling terminal. This meant that any
3979 syntax errors were only noted on the panic log, and the return code from
3980 the command was 0. By re-arranging the code a little, I've made the
3981 decoding happen first, so such errors now appear on stderr, and the return
3982 code is 1. However, the actual setting up of the sockets still happens in
3983 the disconnected process, so errors there are still only recorded on the
3986 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3987 connections (as happens on some IP stacks) was logged at start up time as
3988 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3989 it from "IPv6 and IPv4", which means that two separate sockets are being
3992 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3993 says whether AF_INET or AF_INET6 was passed as an argument.
3995 42. Exiwhat output was messed up when time zones were included in log
3998 43. Exiwhat now gives more information about the daemon's listening ports,
3999 and whether -tls-on-connect was used.
4001 44. The "port" option of the smtp transport is now expanded.
4003 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4004 silently ignored. Now an error message is written to the main and panic
4007 46. There's a new ACL modifier called "logwrite" which writes to a log file
4008 as soon as it is encountered.
4010 47. Added $local_user_uid and $local_user_gid at routing time.
4012 48. Exim crashed when trying to verify a sender address that was being
4015 49. Exim was recognizing only a space character after ".include". It now also
4016 recognizes a tab character.
4018 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4019 extracting the relevant information from the specification. The man page no
4020 longer contains scrambled data for the -d option, and I've added a section
4021 at the front about calling Exim under different names.
4023 51. Added "extra_headers" argument to the "mail" command in filter files.
4025 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4028 53. Installed eximstats 1.29.
4030 54. Added transport_filter_timeout as a generic transport option.
4032 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4033 Cc: header lines. This was required by RFC 822, but it not required by RFC
4036 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4037 incoming messages that did not have them. Now it does so only if the
4038 message originates locally, that is, if there is no associated remote host
4039 address. When Resent- header lines are present, this applies to the Resent-
4040 lines rather than the non-Resent- lines.
4042 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4043 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4045 58. Messages for configuration errors now include the name of the main
4046 configuration file - useful now that there may be more than one file in a
4047 list (.included file names were always shown).
4049 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4050 for those rare installations that do not start the daemon as root or run it
4051 setuid root. I've cut out the call to initgroups() if the daemon is not
4054 60. The Exim user and group can now be bound into the binary as text strings
4055 that are looked up at the start of Exim's processing.
4057 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4059 62. Added $mailstore_basename variable.
4061 63. Installed patch to sieve.c from Michael Haardt.
4063 64. When Exim failed to open the panic log after failing to open the main log,
4064 the original message it was trying to log was written to stderr and debug
4065 output, but if they were not available (the usual case in production), it
4066 was lost. Now it is written to syslog before the two lines that record the
4067 failures to open the logs.
4069 65. Users' Exim filters run in subprocesses under the user's uid. It is
4070 possible for a "deliver" command or an alias in a "personal" command to
4071 provoke an address rewrite. If logging of address rewriting is configured,
4072 this fails because the process is not running as root or exim. There may be
4073 a better way of dealing with this, but for the moment (because 4.30 needs
4074 to be released), I have disabled address rewrite logging when running a
4075 filter in a non-root, non-exim process.
4081 1. The buildconfig auxiliary program wasn't quoting the value set for
4082 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4083 not defined. This bug was masked in 4.22 by the effect that was fixed in
4086 2. Some messages that were rejected after a message id was allocated were
4087 shown as "incomplete" by exigrep. It no longer does this for messages that
4088 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4090 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4091 have allow_domain_literals set, the ID did not get logged in the <= line.
4092 Domain literals are now always recognized in Message-ID: header lines.
4094 4. The first argument for a ${extract expansion item is the key name or field
4095 number. Leading and trailing spaces in this item were not being ignored,
4096 causing some misleading effects.
4098 5. When deliver_drop_privilege was set, single queue runner processes started
4099 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4100 same command in the process it spins off) were not dropping privilege.
4102 6. When the daemon running as "exim" started a queue runner, it always
4103 re-executed Exim in the spun-off process. This is a waste of effort when
4104 deliver_drop_privilege is set. The new process now just calls the
4105 queue-runner function directly.
4111 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4114 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4115 ignored. Though the use of -oP was forcing the writing of a pid file, it
4116 was always written to the default place.
4118 3. If the message "no IP address found for host xxxx" is generated during
4119 incoming verification, it is now followed by identification of the incoming
4120 connection (so you can more easily find what provoked it).
4122 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4124 5. Added some features to "harden" Exim a bit more against certain attacks:
4126 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4127 be put in Local/Makefile. This is like the never_users runtime option,
4128 but it cannot be overridden. The default setting is "root".
4130 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4131 prefix string with which any file named in a -C command line option
4134 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4135 is retained for -C and -D only if the caller of Exim is root. Without
4136 it, the exim user may also use -C and -D and retain privilege.
4138 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4139 command line option is disabled.
4141 6. Macro names set by the -D option must start with an upper case letter, just
4142 like macro names defined in the configuration file.
4144 7. Added "dereference=" facility to LDAP.
4146 8. Two instances of the typo "uknown" in the source files are fixed.
4148 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4149 the Configure-Makefile script screwed up while processing it.
4151 10. Incorporated PCRE 4.4.
4153 11. The SMTP synchronization check was not operating right at the start of an
4154 SMTP session. For example, it could not catch a HELO sent before the client
4155 waited for the greeting. There is now a check for outstanding input at the
4156 point when the greeting is written. Because of the duplex, asynchronous
4157 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4158 way, but not yet received, when the check is performed.
4160 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4161 on TCP/IP sockets, because this apparently causes some broken clients to
4164 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4165 unchanged) from the Cygwin maintainer.
4167 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4168 was supported instead of testing for mbx. Effectively a typo.
4170 15. The spa authenticator server code was not checking that the input it
4171 received was valid base64.
4173 16. The debug output line for the "set" modifier in ACLs was not showing the
4174 name of the variable that was being set.
4176 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4178 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4179 lookup on its own. Something else was needed to trigger the lookup. For
4180 example, a match in host_lookup or the need for a host name in a host list.
4181 Now, if $sender_host_name is referenced and the host name has not yet been
4182 looked up, a lookup is performed. If the lookup fails, the variable remains
4183 empty, and $host_lookup_failed is set to "1".
4185 19. Added "eqi" as a case-independent comparison operator.
4187 20. The saslauthd authentication condition could segfault if neither service
4188 nor realm was specified.
4190 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4191 error message that was logged was misleading, and incoming SMTP
4192 connections were dropped. The message is now more accurate, and temporary
4193 errors are given to SMTP connections.
4195 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4196 (except RSET) with a 421 error, until QUIT is received. However, it was
4197 failing to send a response to QUIT.
4199 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4200 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4201 ACL is now run after the helo_try_verify_hosts code.
4203 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4204 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4205 case-independent, so other case variants are also recognized). Apparently
4206 some systems use these upper case variants.
4208 25. If more than two messages were waiting for the same host, and a transport
4209 filter was specified for the transport, Exim sent two messages over the
4210 same TCP/IP connection, and then failed with "socket operation on non-
4211 socket" when it tried to send the third.
4213 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4215 27. The extern definition of crypt16() in expand.c was not being excluded when
4216 the OS had its own crypt16() function.
4218 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4219 as a preferred synonym for return_size_limit, both as an option and as an
4222 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4224 30. Changed the default configuration ACL to relax the local part checking rule
4225 for addresses that are not in any local domains. For these addresses,
4226 slashes and pipe symbols are allowed within local parts, but the sequence
4227 /../ is explicitly forbidden.
4229 31. SPA server authentication was not clearing the challenge buffer before
4232 32. log_message in a "warn" ACL statement was writing to the reject log as
4233 well as to the main log, which contradicts the documentation and doesn't
4234 seem right (because no rejection is happening). So I have stopped it.
4236 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4237 However, I am unable to do any testing of this.
4239 34. Fixed an infelicity in the appendfile transport. When checking directories
4240 for a mailbox, to see if any needed to be created, it was accidentally
4241 using path names with one or more superfluous leading slashes; tracing
4242 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4244 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4245 contents are added to the log line that is written for every discarded
4246 recipient. (Previously a log_message setting was ignored.)
4248 36. The ${quote: operator now quotes the string if it is empty.
4250 37. The install script runs exim in order to find its version number. If for
4251 some reason other than non-existence or emptiness, which it checks, it
4252 could not run './exim', it was installing it with an empty version number,
4253 i.e. as "exim-". This error state is now caught, and the installation is
4256 38. An argument was missing from the function that creates an error message
4257 when Exim fails to connect to the socket for saslauthd authentication.
4258 This could cause Exim to crash, or give a corrupted message.
4260 39. Added isip, isip4, and isip6 to ${if conditions.
4262 40. The ACL variables $acl_xx are now saved with the message, and can be
4263 accessed later in routers, transports, and filters.
4265 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4266 strings in the file are not string-expanded.
4268 42. If a MAIL command specified a SIZE value that was too large to fit into an
4269 int variable, the check against message_size_limit failed. Such values are
4270 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4271 day this will have to be increased, but I don't think I want to be around
4272 when emails are that large.
4279 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4280 iconv() is not standard in FreeBSD.
4282 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4283 IPv6 enabled. The observed symptom was a segmentation fault on return from
4284 the function os_common_find_running_interfaces() in src/os.c.
4286 3. In the check_special_case() function in daemon.c I had used "errno" as an
4287 argument name, which causes warnings on some systems. This was basically a
4288 typo, since it was named "eno" in the comments!
4290 4. The code that waits for the clock to tick (at a resolution of some fraction
4291 of a second) so as to ensure message-id uniqueness was always waiting for
4292 at least one whole tick, when it could have waited for less. [This is
4293 almost certainly not relevant at current processor speeds, where it is
4294 unlikely to ever wait at all. But we try to future-proof.]
4296 5. The function that sleeps for a time interval that includes fractions of a
4297 second contained a race. It did not block SIGALRM between setting the
4298 timer, and suspending (a couple of lines later). If the interval was short
4299 and the sigsuspend() was delayed until after it had expired, the suspension
4300 never ended. On busy systems this could lead to processes getting stuck for
4303 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4304 process, before it forks any delivery processes. The open lookup caching
4305 mechanism meant that the open file or database connection was passed into
4306 the delivery process. The problem was that delivery processes always tidy
4307 up cached lookup data. This could cause a problem for the next delivery
4308 process started by the queue runner, because the external queue runner
4309 process does not know about the closure. So the next delivery process
4310 still has data in the lookup cache. In the case of a file lookup, there was
4311 no problem because closing a file descriptor in a subprocess doesn't affect
4312 the parent. However, if the lookup was caching a connection to a database,
4313 the connection was closed, and the second delivery process was likely to
4314 see errors such as "PGSQL: query failed: server closed the connection
4315 unexpectedly". The problem has been fixed by closing all cached lookups
4316 in a queue runner before running a delivery process.
4318 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4319 seem to have the "const" qualifier which it has on other OS. I've
4322 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4323 *of the same type* (client or server) with the same public name that an
4324 error should be diagnosed.
4326 9. When Exim looked up a host name for an IP address, but failed to find the
4327 original IP address when looking up the host name (a safety check), it
4328 output the message "<ip address> does not match any IP for NULL", which was
4329 confusing, to say the least. The bug was that the host name should have
4330 appeared instead of "NULL".
4332 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4333 user that is built into the binary, and the -C or -D options is used, root
4334 privilege is dropped before the configuration file is read. In addition,
4335 logging is switched to stderr instead of the normal log files. If the
4336 configuration then re-defines the Exim user, the unprivileged environment
4337 is probably not what is expected, so Exim logs a panic warning message (but
4340 However, if deliver_drop_privilege is set, the unprivileged state may well
4341 be exactly what is intended, so the warning has been cut out in that case,
4342 and Exim is allowed to try to write to its normal log files.
4348 1. smtp_return_error_details was not giving details for temporary sender
4349 or receiver verification errors.
4351 2. Diagnose a configuration error if two authenticators have the same public
4354 3. Exim used not to create the message log file for a message until the first
4355 delivery attempt. This could be confusing when incoming messages were held
4356 for policy or load reasons. The message log file is now created at the time
4357 the message is received, and an initial "Received" line is written to it.
4359 4. The automatically generated man page for command line options had a minor
4360 bug that caused no ill effects; however, a more serious problem was that
4361 the procedure for building the man page automatically didn't always
4362 operate. Consequently, release 4.20 contains an out-of-date version. This
4363 shouldn't happen again.
4365 5. When building Exim with embedded Perl support, the script that builds the
4366 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4367 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4369 6. The freeze_tell option was not being used for messages that were frozen on
4370 arrival, either by an ACL or by local_scan().
4372 7. Added the smtp_incomplete_transaction log selector.
4374 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4375 was accepting AUTH without a new EHLO.
4377 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4378 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4381 10. Logging of TCP/IP connections (when configured) now happens in the main
4382 daemon process instead of the child process, so that the TCP/IP connection
4383 count is more accurate (but it can never be perfect).
4385 11. The use of "drop" in a nested ACL was not being handled correctly in the
4386 outer ACL. Now, if condition failure induced by the nested "drop" causes
4387 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4388 or "require"), the connection is dropped.
4390 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4391 that yield "discard" can now be used with an "accept" or a "discard" verb,
4392 but an error is generated for any others (because I can't see a useful way
4393 to define what should happen).
4395 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4396 are now processed in the same way as lines in the Exim configuration file.
4397 In particular, continuation lines are supported.
4399 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4401 15. Added -ti meaning -t -i.
4403 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4404 domains, and warn by logging if others are found.
4406 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4407 returned from GIFCONF when Exim is trying to find the list of interfaces on
4408 a host. The code in os.c has been modified to copy each ifreq to an aligned
4409 structure in all cases.
4411 Also, in some cases, the returned ifreq's were being copied to a 'struct
4412 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4413 means the last couple of bytes of an IPv6 address could be chopped if the
4414 ifreq contained only a normal sockaddr (14 bytes storage).
4416 18. Named domain lists were not supported in the hosts_treat_as_local option.
4417 An entry such as +xxxx was not recognized, and was treated as a literal
4420 19. Ensure that header lines added by a DATA ACL are included in the reject log
4421 if the ACL subsequently rejects the message.
4423 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4424 MD5 (which is deprecated).
4426 21. When testing a filter file using -bf, Exim was writing a message when it
4427 took the sender from a "From " line in the message, but it was not doing so
4428 when it took $return_path from a Return-Path: header line. It now does.
4430 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4431 with a valid header line field name (a series of printing characters
4432 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4434 23. Changed "disc" in the source to "disk" to conform to the documentation and
4435 the book and for uniformity.
4437 24. Ignore Sendmail's -Ooption=value command line item.
4439 25. When execve() failed while trying to run a command in a pipe transport,
4440 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4441 could be confused with a return value of 69 from the command itself. This
4442 has been changed to 127, the value the shell returns if it is asked to run
4443 a non-existent command. The wording for the related log line suggests a
4444 non-existent command as the problem.
4446 26. If received_header_text expands to an empty string, do not add a Received:
4447 header line to the message. (Well, it adds a token one on the spool, but
4448 marks it "old" so that it doesn't get used or transmitted.)
4450 27. Installed eximstats 1.28 (addition of -nt option).
4452 28. There was no check for failure on the call to getsockname() in the daemon
4453 code. This can fail if there is a shortage of resources on the system, with
4454 ENOMEM, for example. A temporary error is now given on failure.
4456 29. Contrary to the C standard, it seems that in some environments, the
4457 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4458 program. Exim now does this explicitly; it affects the formatting of
4459 timestamps using strftime().
4461 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4462 complaints. I've now initialized all the variables, to avoid this.
4464 32. Header lines added by a system filter were not being "seen" during
4465 transport-time rewrites.
4467 33. The info_callback() function passed to OpenSSL is set up with type void
4468 (*)(SSL *, int, int), as described somewhere. However, when calling the
4469 function (actually a macro) that sets it up, the type void(*)() is
4470 expected. I've put in a cast to prevent warnings from picky compilers.
4472 34. If a DNS black list lookup found a CNAME record, but there were no A
4473 records associated with the domain it pointed at, Exim crashed.
4475 35. If a DNS black list lookup returned more than one A record, Exim ignored
4476 all but the first. It now scans all returned addresses if a particular IP
4477 value is being sought. In this situation, the contents of the
4478 $dnslist_value variable are a list of all the addresses, separated by a
4481 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4482 to accept a host name and all its aliases if the forward lookup for any of
4483 them yielded the IP address of the incoming connection. Now it accepts only
4484 those names whose forward lookup yields the correct IP address. Any other
4485 names are discarded. This closes a loophole whereby a rogue DNS
4486 administrator could create reverse DNS records to break through a
4487 wildcarded host restriction in an ACL.
4489 37. If a user filter or a system filter that ran in a subprocess used any of
4490 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4491 the wrong values were passed to the pipe command ($thisaddress had the
4492 value of $0, $0 had the value of $1, etc). This bug was introduced by
4493 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4495 38. Improved the line breaking for long SMTP error messages from ACLs.
4496 Previously, if there was no break point between 40 and 75 characters, Exim
4497 left the rest of the message alone. Two changes have been made: (a) I've
4498 reduced the minimum length to 35 characters; (b) if it can't find a break
4499 point between 35 and 75 characters, it looks ahead and uses the first one
4500 that it finds. This may give the occasional overlong line, but at least the
4501 remaining text gets split now.
4503 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4504 file descriptors might be low, and that setting 1000 would always raise it.
4505 It turns out that in some environments, the limit is already over 1000 and
4506 that lowering it causes trouble. So now Exim takes care not to decrease it.
4508 40. When delivering a message, the value of $return_path is set to $sender_
4509 address at the start of routing (routers may change the value). By an
4510 oversight, this default was not being set up when an address was tested by
4511 -bt or -bv, which affected the outcome if any router or filter referred to
4514 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4515 log only when "message" or "log_message" are set. However, if one of the
4516 conditions was an address verification, or a call to a nested ACL, the
4517 messages generated by the underlying test were being passed through. This
4518 no longer happens. The underlying message is available in $acl_verify_
4519 message for both "message" and "log_message" expansions, so it can be
4520 passed through if needed.
4522 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4523 new expansion $bh_ to give the encoded byte string without charset
4524 translation. Translation happens only if iconv() is available; HAVE_ICONV
4525 indicates this at build time. HEADERS_CHARSET gives the charset to
4526 translate to; headers_charset can change it in the configuration, and
4527 "headers charset" can change it in an individual filter file.
4529 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4530 that creates RFC 2047 encoded "words" labels them as that charset instead
4531 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4532 expansion operator; (ii) when Exim creates a From: line for a local
4533 message; (iii) when a header line is rewritten to include a "phrase" part.
4535 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4536 buggy, causing it to skip the first lines of messages whose message ID
4537 ended in 'D'. This would not have bitten before Exim release 4.14, because
4538 message IDs were unlikely to end in 'D' before then. The effect was to have
4539 incorrect size information for certain domains.
4541 45. #include "config.h" was missing at the start of the crypt16.c module. This
4542 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4545 46. If there was a timeout during a "random" callout check, Exim treated it as
4546 a failure of the random address, and carried on sending RSET and the real
4547 address. If the delay was just some slowness somewhere, the response to the
4548 original RCPT would be taken as a response to RSET and so on, causing
4549 mayhem of various kinds.
4551 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4552 when I implemented it. It didn't allow for the fact that some option values
4553 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4554 the right test for positive values.
4556 48. Domain names in DNS records are case-independent. Exim always looks them up
4557 in lower case. Some resolvers return domain names in exactly the case they
4558 appear in the zone file, that is, they may contain uppercase letters. Not
4559 all resolvers do this - some return always lower case. Exim was treating a
4560 change of case by a resolver as a change of domain, similar to a widening
4561 of a domain abbreviation. This triggered its re-routing code and so it was
4562 trying to route what was effectively the same domain again. This normally
4563 caused routing to fail (because the router wouldn't handle the domain
4564 twice). Now Exim checks for this case specially, and just changes the
4565 casing of the domain that it ultimately uses when it transmits the message
4568 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4571 50. If a filter generated a file delivery with a non-absolute name (possible if
4572 no home directory exists for the router), the forbid_file option was not
4575 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4576 the existing equality matching.
4578 52. Exim was using ints instead of ino_t variables in some places where it was
4579 dealing with inode numbers.
4581 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4582 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4583 called TMPDIR, and if it finds it is different, it changes its value.
4585 54. The smtp_printf() function is now made available to local_scan() so
4586 additional output lines can be written before returning. There is also an
4587 smtp_fflush() function to enable the detection of a dropped connection.
4588 The variables smtp_input and smtp_batched_input are exported to
4591 55. Changed the default runtime configuration: the message "Unknown user"
4592 has been removed from the ACL, and instead placed on the localuser router,
4593 using the cannot_route_message feature. This means that any verification
4594 failures that generate their own messages won't get overridden. Similarly,
4595 the "Unrouteable address" message that was in the ACL for unverifiable
4596 relay addresses has also been removed.
4598 56. Added hosts_avoid_esmtp to the smtp transport.
4600 57. The exicyclog script was not checking for the esoteric option
4601 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4602 will work only if exicyclog is run under the appropriate euid.
4604 58. Following a discussion on the list, the rules by which Exim recognises line
4605 endings on incoming messages have been changed. The -dropcr and drop_cr
4606 options are now no-ops, retained only for backwards compatibility. The
4607 following line terminators are recognized: LF CRLF CR. However, special
4608 processing applies to CR:
4610 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4611 nor a local message in the state where . is a terminator.
4613 (ii) If a bare CR is encountered in a header line, an extra space is added
4614 after the line terminator so as not to end the header. The reasoning
4615 behind this is that bare CRs in header lines are most likely either
4616 to be mistakes, or people trying to play silly games.
4618 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4619 was being incorrectly given as 18 bytes larger than it should have been.
4620 This is a VOB (very old bug).
4622 60. This may never have affected anything current, but just in case it has:
4623 When the local host is found other than at the start of a list of hosts,
4624 the local host, those with the same MX, and any that follow, are discarded.
4625 When the list in question was part of a longer list of hosts, the following
4626 hosts (not currently being processed) were also being discarded. This no
4627 longer happens. I'm not sure if this situation could ever has previously
4630 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4633 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4634 header. This is something that is recommended in a new Internet Draft, and
4635 is something that is documented as being done by Sendmail. There are two
4636 possible values. For messages generated by the autoreply transport, Exim
4639 Auto-Submitted: auto-replied
4641 whereas for all other generated messages (e.g. bounces) it adds
4643 Auto-Submitted: auto-generated
4645 63. The "personal" condition in filters now includes a test for the
4646 Auto-Submitted: header. If it contains the string "auto-" the message it
4647 not considered personal.
4649 64. Added rcpt_include_affixes as a generic transport option.
4651 65. Added queue_only_override (default true).
4653 66. Added the syslog_duplication option.
4655 67. If what should have been the first header line of a message consisted of
4656 a space followed by a colon, Exim was mis-interpreting it as a header line.
4657 It isn't of course - it is syntactically invalid and should therefore be
4658 treated as the start of the message body. The misbehaviour could have
4659 caused a number of strange effects, including loss of data in subsequent
4660 header lines, and spool format errors.
4662 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4663 client host had authenticated. This control can now be exercised by an ACL
4664 for more flexibility.
4666 69. By default, callouts do not happen when testing with -bh. There is now a
4667 variant, -bhc, which does actually run the callout code, including
4668 consulting and updating the callout cache.
4670 70. Added support for saslauthd authentication, courtesy of Alexander
4673 71. If statvfs() failed on the spool or log directories while checking their
4674 size for availability, Exim confusingly gave the error "space shortage".
4675 Furthermore, in debugging mode it crashed with a floating point exception.
4676 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4677 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4678 serious problem, Exim now writes to the main and panic logs when this
4679 happens, with details of the failure. It then refuses to accept the
4680 incoming message, giving the message "spool directory problem" or "log
4681 directory problem" with a 421 code for SMTP messages.
4683 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4684 0, 1, and 2 exist, because some OS complain for execs without them (see
4685 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4686 descriptors. However, the code omitted to check that the open succeeded,
4687 causing mysterious errors if for some reason the permissions on /dev/null
4688 got screwed. Now Exim writes a message to the main and panic logs, and
4689 bombs out if it can't open /dev/null.
4691 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4692 interact so that it is all more flexible. It is supposed to remain
4693 backwards compatible. Also added extra_local_interfaces.
4695 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4696 to bomb out with an assertion failure - to the client this appears as a
4697 connection drop. This problem occurs in the part of the code that was taken
4698 from the Samba project. Fortunately, the assertion is in a very simple
4699 function, so I have fixed this by reproducing the function inline in the
4700 one place where it is called, and arranging for authentication to fail
4701 instead of killing the process with assert().
4703 75. The SPA client code was not working when the server requested OEM rather
4704 than Unicode encoding.
4706 76. Added code to make require_files with a specific uid setting more usable in
4707 the case where statting the file as root fails - usually a non-root-mounted
4708 NFS file system. When this happens and the failure is EACCES, Exim now
4709 forks a subprocess and does the per-uid checking as the relevant uid.
4711 77. Added process_log_path.
4713 78. If log_file_path was not explicitly set, a setting of check_log_space or
4714 check_log_inodes was ignored.
4716 79. If a space check for the spool or log partitions fails, the incident is now
4717 logged. Of course, in the latter case the data may get lost...
4719 80. Added the %p formatting code to string_format() so that it can be used to
4720 print addresses in debug_print(). Adjusted all the address printing in the
4721 debugging in store.c to use %p rather than %d.
4723 81. There was a concern that a line of code in smtp_in.c could overflow a
4724 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4725 initially expressed, the concern was not well-founded, because trailing
4726 spaces are removed early. However, if the trailing spaces were followed by
4727 a NULL, they did not get removed, so the overflow was possible. Two fixes
4730 (a) I re-wrote the offending code in a cleaner fashion.
4731 (b) If an incoming SMTP command contains a NULL character, it is rejected
4734 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4735 runs initgroups(), so that if the Exim user is in any additional groups,
4736 they will be used during message reception.
4742 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob