1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.512 2007/06/14 14:18:19 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 Another patch from the Sieve maintainer.
11 PH/02 When an IPv6 address is converted to a string for single-key lookup
12 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
13 dots are used instead of colons so that keys in lsearch files need not
14 contain colons. This was done some time before quoting was made available
15 in lsearch files. However, iplsearch files do require colons in IPv6 keys
16 (notated using the quote facility) so as to distinguish them from IPv4
17 keys. This meant that lookups for IP addresses in host lists did not work
18 for iplsearch lookups.
20 This has been fixed by arranging for IPv6 addresses to be expressed with
21 colons if the lookup type is iplsearch. This is not incompatible, because
22 previously such lookups could never work.
24 The situation is now rather anomolous, since one *can* have colons in
25 ordinary lsearch keys. However, making the change in all cases is
26 incompatible and would probably break a number of configurations.
28 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
31 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
32 conversion specification without a maximum field width, thereby enabling
33 a rogue spamd server to cause a buffer overflow. While nobody in their
34 right mind would setup Exim to query an untrusted spamd server, an
35 attacker that gains access to a server running spamd could potentially
36 exploit this vulnerability to run arbitrary code as the Exim user.
38 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
39 $primary_hostname instead of what libspf2 thinks the hosts name is.
41 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
42 a directory entry by the name of the lookup key. Previously, if a
43 symlink pointed to a non-existing file or a file in a directory that
44 Exim lacked permissions to read, a lookup for a key matching that
45 symlink would fail. Now it is enough that a matching directory entry
46 exists, symlink or not. (Bugzilla 503.)
48 PH/03 The body_linecount and body_zerocount variables are now exported in the
51 PH/04 Added the $dnslist_matched variable.
57 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
58 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
61 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
64 PH/02 In an ACL statement such as
66 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
68 if a client was not listed at all, or was listed with a value other than
69 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
70 the condition was not true (as it should be), so access was not denied.
71 The bug was that the ! inversion was incorrectly passed on to the second
72 item. This has been fixed.
74 PH/03 Added additional dnslists conditions == and =& which are different from
75 = and & when the dns lookup returns more than one IP address.
77 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
78 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
80 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
81 FSYNC, which compiles an option called disable_fsync that allows for
82 bypassing fsync(). The documentation is heavily laced with warnings.
84 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
86 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
87 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
88 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
89 including adding "make clean"; (3) Added -fPIC when compiling the test
90 dynamically loaded module, to get rid of a warning.
92 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
93 message fails, move_frozen_messages = true and ignore_bounce_errors_after
94 = 0s. The bug is otherwise harmless.
96 PH/07 There was a bug in the dovecot authenticator such that the value of
97 $auth1 could be overwritten, and so not correctly preserved, after a
98 successful authentication. This usually meant that the value preserved by
99 the server_setid option was incorrect.
101 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
103 PH/09 Installed PCRE release 7.0.
105 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
106 run for batched SMTP input. It is now run at the start of every message
107 in the batch. While fixing this I discovered that the process information
108 (output by running exiwhat) was not always getting set for -bs and -bS
109 input. This is fixed, and it now also says "batched" for BSMTP.
111 PH/11 Added control=no_pipelining.
113 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
114 patch, slightly modified), and move the expansion of helo_data till after
115 the connection is made in the smtp transport (so it can use these
118 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
120 PH/14 Added log_selector = +pid.
122 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
124 PH/16 Add ${if forany and ${if forall.
126 PH/17 Added dsn_from option to vary the From: line in DSNs.
128 PH/18 Flush SMTP output before performing a callout, unless control =
129 no_callout_flush is set.
131 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
132 was true (the default) a successful delivery failed to delete the retry
133 item, thus causing premature timeout of the address. The bug is now
136 PH/20 Added hosts_avoid_pipelining to the smtp transport.
138 PH/21 Long custom messages for fakedefer and fakereject are now split up
139 into multiline reponses in the same way that messages for "deny" and
140 other ACL rejections are.
142 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
143 with slight modification.
145 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
146 draft, changing the syntax and factoring some duplicate code".
148 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
149 for deliveries of the second and subsequent messages over the same SMTP
152 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
153 ${reduce, with only minor "tidies".
155 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
157 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
158 expansion side effects.
160 PH/27 When a message times out after an over-quota error from an Exim-imposed
161 quota, the bounce message says "mailbox is full". This message was not
162 being given when it was a system quota that was exceeded. It now should
165 MH/03 Made $recipients available in local_scan(). local_scan() already has
166 better access to the recipient list through recipients_list[], but
167 $recipients can be useful in postmaster-provided expansion strings.
169 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
170 in the case of a MAIL command with additional options following the
171 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
172 were accidentally chopped off.
174 PH/29 SMTP synchronization checks are implemented when a command is read -
175 there is a check that no more input is waiting when there shouldn't be
176 any. However, for some commands, a delay in an ACL can mean that it is
177 some time before the response is written. In this time, more input might
178 arrive, invalidly. So now there are extra checks after an ACL has run for
179 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
180 pipelining has not been advertised.
182 PH/30 MH's patch to allow iscntrl() characters to be list separators.
184 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
185 returned in the SMTP response when smtp_return_error_details was false.
188 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
189 instead of the C I/O that was originally supplied, because problems were
192 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
193 Exim which did not show up earlier: it was assuming that a call to
194 SSL_CTX_set_info_callback() might give an error value. In fact, there is
195 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
196 was a macro that became an assignment, so it seemed to work. This has
197 changed to a proper function call with a void return, hence the compile
198 error. Exim's code has been fixed.
200 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
203 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
205 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
207 PH/37 If a message is not accepted after it has had an id assigned (e.g.
208 because it turns out to be too big or there is a timeout) there is no
209 "Completed" line in the log. When some messages of this type were
210 selected by exigrep, they were listed as "not completed". Others were
211 picked up by some special patterns. I have improved the selection
212 criteria to be more general.
214 PH/38 The host_find_failed option in the manualroute router can now be set
215 to "ignore", to completely ignore a host whose IP address cannot be
216 found. If all hosts are ignored, the behaviour is controlled by the new
217 host_all_ignored option.
219 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
220 homing or because of multiple MX records with /mx) generated more than
221 one IP address, and the following item turned out to be the local host,
222 all the secondary addresses of the first item were incorrectly removed
223 from the list, along with the local host and any following hosts (which
224 is what is supposed to happen).
226 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
227 whoever called Exim into the -H file. In the case of the daemon it was
228 behaving confusingly. When first started, it used values for whoever
229 started the daemon, but after a SIGHUP it used the Exim user (because it
230 calls itself on a restart). I have changed the code so that it now always
233 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
234 message are rejected with the same error (e.g. no authentication or bad
235 sender address), and a DATA command is nevertheless sent (as can happen
236 with PIPELINING or a stupid MUA), the error message that was given to the
237 RCPT commands is included in the rejection of the DATA command. This is
238 intended to be helpful for MUAs that show only the final error to their
241 PH/42 Another patch from the Sieve maintainer.
243 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
244 Eximstats - Fixed some broken HTML links and added missing column headers
246 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
247 columns for Rejects, Temp Rejects, Ham, and Spam rows.
249 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
251 PH/43 Yet another patch from the Sieve maintainer.
253 PH/44 I found a way to check for a TCP/IP connection going away before sending
254 the response to the final '.' that terminates a message, but only in the
255 case where the client has not sent further data following the '.'
256 (unfortunately, this is allowed). However, in many cases there won't be
257 any further data because there won't be any more messages to send. A call
258 to select() can be used: if it shows that the input is "ready", there is
259 either input waiting, or the socket has been closed. An attempt to read
260 the next input character can distinguish the two cases. Previously, Exim
261 would have sent an OK response which the client would never have see.
262 This could lead to message repetition. This fix should cure that, at
263 least in a lot of common cases.
265 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
266 advertised in response to EHLO.
272 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
273 fixed by 4.65/MH/01 (is this a record?) are fixed:
275 (i) An empty string was always treated as zero by the numeric comparison
276 operators. This behaviour has been restored.
278 (ii) It is documented that the numeric comparison operators always treat
279 their arguments as decimal numbers. This was broken in that numbers
280 starting with 0 were being interpreted as octal.
282 While fixing these problems I realized that there was another issue that
283 hadn't been noticed. Values of message_size_limit (both the global option
284 and the transport option) were treated as octal if they started with 0.
285 The documentation was vague. These values are now always treated as
286 decimal, and I will make that clear in the documentation.
292 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
293 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
296 MH/01 Don't check that the operands of numeric comparison operators are
297 integers when their expansion is in "skipping" mode (fixes bug
298 introduced by 4.64-PH/07).
300 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
301 child addresses, Exim now panics and dies. Previously, because the count
302 is held in a short int, deliveries were likely to be lost. As such a
303 large number of recipients for a single message is ridiculous
304 (performance will be very, very poor), I have chosen to impose a limit
305 rather than extend the field.
311 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
312 leftover -K file (the existence of which was triggered by #402).
313 While we were at it, introduced process PID as part of the -K
314 filename. This should rule out race conditions when creating
317 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
318 processing considerably. Previous code took too long for large mails,
319 triggering a timeout which in turn triggers #401.
321 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
322 in the DK code in transports.c. sendfile() is not really portable,
323 hence the _LINUX specificness.
325 TF/01 In the add_headers option to the mail command in an Exim filter,
326 there was a bug that Exim would claim a syntax error in any
327 header after the first one which had an odd number of characters
330 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
331 callout verification, Exim cached a "reject" for the entire domain. This
332 is correct for most verifications, but it is not correct for a recipient
333 verification with use_sender or use_postmaster set, because in that case
334 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
335 case of MAIL FROM:<> rejection from other early rejections (e.g.
336 rejection of HELO). When verifying a recipient using a non-null MAIL
337 address, the cache is ignored if it shows MAIL FROM:<> rejection.
338 Whatever the result of the callout, the value of the domain cache is
339 left unchanged (for any other kind of callout, getting as far as trying
340 RCPT means that the domain itself is ok).
342 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
345 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
346 manifest itself as EPIPE rather than ECONNECT. When tidying away a
347 session, the daemon ignores ECONNECT errors and logs others; it now
348 ignores EPIPE as well.
350 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
351 (quoted-printable decoding).
353 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
354 later the small subsequent patch to fix an introduced bug.
356 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
358 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
360 PH/08 An error is now given if message_size_limit is specified negative.
362 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
363 to be given (somewhat) arbitrary names.
365 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
368 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
369 miscellaneous code fixes
371 PH/10 Added the log_reject_target ACL modifier to specify where to log
374 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
375 hostname. This is wrong, because it relates to the incoming message (and
376 probably the interface on which it is arriving) and not to the outgoing
377 callout (which could be using a different interface). This has been
378 changed to use the value of the helo_data option from the smtp transport
379 instead - this is what is used when a message is actually being sent. If
380 there is no remote transport (possible with a router that sets up host
381 addresses), $smtp_active_hostname is used.
383 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
384 tweaks were necessary in order to get it to work (see also 21 below):
385 (a) The code assumed that strncpy() returns a negative number on buffer
386 overflow, which isn't the case. Replaced with Exim's string_format()
388 (b) There were several signed/unsigned issues. I just did the minimum
389 hacking in of casts. There is scope for a larger refactoring.
390 (c) The code used strcasecmp() which is not a standard C function.
391 Replaced with Exim's strcmpic() function.
392 (d) The code set only $1; it now sets $auth1 as well.
393 (e) A simple test gave the error "authentication client didn't specify
394 service in request". It would seem that Dovecot has changed its
395 interface. Fortunately there's a specification; I followed it and
396 changed what the client sends and it appears to be working now.
398 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
401 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
402 address A is aliased to B and C, where B exists and C does not. Without
403 -v the output is "A verified" because verification stops after a
404 successful redirection if more than one address is generated. However,
405 with -v the child addresses are also verified. Exim was outputting "A
406 failed to verify" and then showing the successful verification for C,
407 with its parentage. It now outputs "B failed to verify", showing B's
408 parentage before showing the successful verification of C.
410 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
411 look up a TXT record in a specific list after matching in a combined
414 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
415 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
416 they consult the DNS. I had assumed they would set it the way they
417 wanted; and indeed my experiments on Linux seem to show that in some
418 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
419 To be on the safe side, however, I have now made the interface to
420 host_find_byname() similar to host_find_bydns(), with an argument
421 containing the DNS resolver options. The host_find_byname() function now
422 sets these options at its start, just as host_find_bydns() does. The smtp
423 transport options dns_qualify_single and dns_search_parents are passed to
424 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
425 of host_find_byname() use the default settings of RES_DEFNAMES
426 (qualify_single) but not RES_DNSRCH (search_parents).
428 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
429 spool_read_header() do less string testing, by means of a preliminary
430 switch on the second character of optional "-foo" lines. (This is
431 overdue, caused by the large number of possibilities that now exist.
432 Originally there were few.) While I was there, I also converted the
433 str(n)cmp tests so they don't re-test the leading "-" and the first
434 character, in the hope this might squeeze out yet more improvement.
436 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
437 flag allowing group syntax was set by the header_syntax check but not
438 turned off, possible causing trouble later; (2) The flag was not being
439 set at all for the header_verify test, causing "group"-style headers to
440 be rejected. I have now set it in this case, and also caused header_
441 verify to ignore an empty address taken from a group. While doing this, I
442 came across some other cases where the code for allowing group syntax
443 while scanning a header line wasn't quite right (mostly, not resetting
444 the flag correctly in the right place). These bugs could have caused
445 trouble for malformed header lines. I hope it is now all correct.
447 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
448 with the "reply" argument non-NULL. The code, however (which originally
449 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
450 but it didn't always do it. This confused somebody who was copying the
451 code for some other use. I have removed all the tests.
453 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
454 feature that was used to support insecure browsers during the U.S. crypto
455 embargo. It requires special client support, and Exim is probably the
456 only MTA that supported it -- and would never use it because real RSA is
457 always available. This code has been removed, because it had the bad
458 effect of slowing Exim down by computing (never used) parameters for the
459 RSA_EXPORT functionality.
461 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
462 authenticator to fail if there's a tab character in the incoming data
463 (there should never be unless someone is messing about, as it's supposed
464 to be base64-encoded). Also added, on Timo's advice, the "secured" option
465 if the connection is using TLS or if the remote IP is the same as the
466 local IP, and the "valid-client-cert option" if a client certificate has
469 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
470 authenticators. This can be used for authorization after authentication
471 succeeds. (In the case of plaintext, it servers for both authentication
474 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
475 if any retry times were supplied.
477 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
478 connection, where there is no client IP address to check. In this
479 situation, the verify now always succeeds.
481 PH/25 Applied John Jetmore's -Mset patch.
483 PH/26 Added -bem to be like -Mset, but loading a message from a file.
485 PH/27 In a string expansion for a processed (not raw) header when multiple
486 headers of the same name were present, leading whitespace was being
487 removed from all of them, but trailing whitespace was being removed only
488 from the last one. Now trailing whitespace is removed from each header
489 before concatenation. Completely empty headers in a concatenation (as
492 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
493 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
495 PH/29 [Removed. This was a change that I later backed out, and forgot to
496 correct the ChangeLog entry (that I had efficiently created) before
497 committing the later change.]
499 PH/30 Exim was sometimes attempting to deliver messages that had suffered
500 address errors (4xx response to RCPT) over the same connection as other
501 messages routed to the same hosts. Such deliveries are always "forced",
502 so retry times are not inspected. This resulted in far too many retries
503 for the affected addresses. The effect occurred only when there were more
504 hosts than the hosts_max_try setting in the smtp transport when it had
505 the 4xx errors. Those hosts that it had tried were not added to the list
506 of hosts for which the message was waiting, so if all were tried, there
507 was no problem. Two fixes have been applied:
509 (i) If there are any address or message errors in an SMTP delivery, none
510 of the hosts (tried or untried) are now added to the list of hosts
511 for which the message is waiting, so the message should not be a
512 candidate for sending over the same connection that was used for a
513 successful delivery of some other message. This seems entirely
514 reasonable: after all the message is NOT "waiting for some host".
515 This is so "obvious" that I'm not sure why it wasn't done
516 previously. Hope I haven't missed anything, but it can't do any
517 harm, as the worst effect is to miss an optimization.
519 (ii) If, despite (i), such a delivery is accidentally attempted, the
520 routing retry time is respected, so at least it doesn't keep
521 hammering the server.
523 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
524 in ${readsocket because some servers need this prod.
526 PH/32 Added some extra debug output when updating a wait-xxx database.
528 PH/33 The hint "could be header name not terminated by colon", which has been
529 given for certain expansion errors for a long time, was not being given
530 for the ${if def:h_colon_omitted{... case.
532 PH/34 The spec says: "With one important exception, whenever a domain list is
533 being scanned, $domain contains the subject domain." There was at least
534 one case where this was not true.
536 PH/35 The error "getsockname() failed: connection reset by peer" was being
537 written to the panic log as well as the main log, but it isn't really
538 panic-worthy as it just means the connection died rather early on. I have
539 removed the panic log writing for the ECONNRESET error when getsockname()
542 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
543 runs only) independently of the message's sender address. This meant
544 that, if the 4xx error was in fact related to the sender, a different
545 message to the same recipient with a different sender could confuse
546 things. In particualar, this can happen when sending to a greylisting
547 server, but other circumstances could also provoke similar problems.
548 I have changed the default so that the retry time for these errors is now
549 based a combination of the sender and recipient addresses. This change
550 can be overridden by setting address_retry_include_sender=false in the
553 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
554 remote server are returned as part of bounce messages. This was not
555 happening for LMTP over a pipe (the lmtp transport), but now it is the
556 same for both kinds of LMTP.
558 PH/38 Despite being documented as not happening, Exim was rewriting addresses
559 in header lines that were in fact CNAMEs. This is no longer the case.
561 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
562 and queue runs started by the daemon processed all messages. This has
563 been fixed so that -R and -S can now usefully be given with -q<time>.
565 PH/40 Import PCRE release 6.7 (fixes some bugs).
567 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
569 PH/42 Give an error if -q is specified more than once.
571 PH/43 Renamed the variables $interface_address and $interface_port as
572 $received_ip_address and $received_port, to make it clear that these
573 values apply to message reception, and not to the outgoing interface when
574 a message is delivered. (The old names remain recognized, of course.)
576 PH/44 There was no timeout on the connect() call when using a Unix domain
577 socket in the ${readsocket expansion. There now is.
579 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
580 be meaningful with "accept".
582 SC/01 Eximstats V1.43
583 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
585 SC/02 Eximstats V1.44
586 Use a glob alias rather than an array ref in the generated
587 parser. This improves both readability and performance.
589 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
590 Collect SpamAssassin and rejection statistics.
591 Don't display local sender or destination tables unless
592 there is data to show.
593 Added average volumes into the top table text output.
595 SC/04 Eximstats V1.46
596 Collect data on the number of addresses (recipients)
597 as well as the number of messages.
599 SC/05 Eximstats V1.47
600 Added 'Message too big' to the list of mail rejection
601 reasons (thanks to Marco Gaiarin).
603 SC/06 Eximstats V1.48
604 Mainlog lines which have GMT offsets and are too short to
605 have a flag are now skipped.
607 SC/07 Eximstats V1.49 (Alain Williams)
608 Added the -emptyok flag.
610 SC/08 Eximstats V1.50
611 Fixes for obtaining the IP address from reject messages.
613 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
614 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
615 whitesspace changes from 4.64-PH/27
617 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
620 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
621 are found, allow negative numbers in numeric criteria)
623 JJ/06 exipick.20061117.2, added new $message_body_missing variable
625 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
626 to match changes made in 4.64-PH/43
628 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
630 PH/47 Put in an explicit test for a DNS lookup of an address record where the
631 "domain" is actually an IP address, and force a failure. This locks out
632 those revolvers/nameservers that support "A-for-A" lookups, in
633 contravention of the specifications.
635 PH/48 When a host name was looked up from an IP address, and the subsequent
636 forward lookup of the name timed out, the host name was left in
637 $sender_host_name, contrary to the specification.
639 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
640 restricted to single-key lookups, Exim was not diagnosing an error if
641 * or *@ was used with a query-style lookup.
643 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
645 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
646 long ago, but noone interested enough thought of it. Let's just say that
647 the "1.1" means that there are some new functions that weren't there at
648 some point in the past.
650 PH/51 Error processing for expansion failure of helo_data from an smtp
651 transport during callout processing was broken.
653 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
654 tested/used via the -bh/-bhc/-bs options.
656 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
657 bug, fixed in subsequent PCRE releases).
659 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
660 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
662 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
668 SC/01 Use a glob alias rather than an array ref in eximstats generated
669 parser. This improves both readability and performance.
671 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
672 Don't display local sender or destination tables in eximstats unless
673 there is data to show.
674 Added average volumes into the eximstats top table text output.
676 SC/03 Collect data on the number of addresses (recipients) as well
677 as the number of messages in eximstats.
679 TF/01 Correct an error in the documentation for the redirect router. Exim
680 does (usually) call initgroups() when daemonizing.
682 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
683 with consistent privilege compared to when running as a daemon.
685 TF/03 Note in the spec that $authenticated_id is not set for local
686 submissions from trusted users.
688 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
689 Thanks to Dean Brooks <dean@iglou.com> for the patch.
691 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
692 by adding some example configuration directives to the default
693 configuration file. A little bit of work is required to uncomment the
694 directives and define how usernames and passwords are checked, but
695 there is now a framework to start from.
697 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
698 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
699 without this. I don't know how relevant this is to other LDAP libraries.
701 PH/02 Add the verb name to the "unknown ACL verb" error.
703 PH/03 Magnus Holmgren's patch for filter_prepend_home.
705 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
707 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
708 directory not expanded when it should be if an expanded home directory
709 was set for the address (which is overridden by the transport).
711 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
714 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
715 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
716 because it is too late at that time, and has no effect.
718 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
719 security issue with \' (bugzilla #107). I could not use the
720 PQescapeStringConn() function, because it needs a PGconn value as one of
723 PH/08 When testing addresses using -bt, indicate those final addresses that
724 are duplicates that would not cause an additional delivery. At least one
725 person was confused, thinking that -bt output corresponded to deliveries.
726 (Suppressing duplicates isn't a good idea as you lose the information
727 about possibly different redirections that led to the duplicates.)
729 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
730 systems where poll() doesn't work, in particular OS X.
732 PH/10 Added more information to debugging output for retry time not reached.
734 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
735 operations in malware.c.
737 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
740 PH/13 If write_rejectlog was set false when logging was sent to syslog with
741 syslog_duplication set false, log lines that would normally be written
742 both the the main log and to the reject log were not written to syslog at
745 PH/14 In the default configuration, change the use of "message" in ACL warn
746 statements to "add_header".
748 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
749 not followed by a command (e.g. "seen endif").
751 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
752 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
755 PH/17 Added extra conditions to the default value of delay_warning_condition
759 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
760 { match{$h_precedence:}{(?i)bulk|list|junk} } \
761 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
764 The Auto-Submitted: and various List- headers are standardised, whereas I
765 don't think Precedence: ever was.
767 PH/18 Refactored debugging code in route_finduser() to show more information,
768 in particular, the error code if getpwnam() issues one.
770 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
771 This is apparently needed in addition to the PH/07 change above to avoid
772 any possible encoding problems.
774 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
775 but not after initializing Perl.
777 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
778 output them only if debugging. By default they are written stderr,
779 apparently, which is not desirable.
781 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
784 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
787 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
789 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
790 authenticated or an ident call has been made. Suppress the default
791 values for $authenticated_id and $authenticated_sender (but permit -oMai
792 and -oMas) when testing with -bh.
794 PH/24 Re-jigged the order of the tests in the default configuration so that the
795 tests for valid domains and recipients precede the DNS black list and CSA
796 tests, on the grounds that those ones are more expensive.
798 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
799 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
800 This bug exists in every version of Exim that I still have, right back to
803 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
804 However, an attempt to turn on case-sensitivity in a regex key by
805 including (?-i) didn't work because the subject string was already
806 lowercased, and the effects were non-intuitive. It turns out that a
807 one-line patch can be used to allow (?-i) to work as expected.
813 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
814 other effects) broke the use of negated acl sub-conditions.
816 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
819 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
820 "Deny" causes Exim to reject the incoming connection with a 554 error.
821 Unfortunately, if there is a major crisis, such as a disk failure,
822 tcp-wrappers gives "deny", whereas what one would like would be some
823 kind of temporary error. A kludge has been added to help with this.
824 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
825 554 error is used if errno is still zero or contains ENOENT (which occurs
826 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
829 PH/03 Add -lutil to the default FreeBSD LIBS setting.
831 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
832 errors. Otherwise a message that provokes a temporary error (when other
833 messages do not) can cause a whole host to time out.
835 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
836 addresses were routed directly to files or pipes from a redirect router.
837 File deliveries just didn't batch; pipe deliveries might have suffered
840 PH/06 A failure to get a lock for a hints database would erroneously always say
841 "Failed to get write lock", even when it was really a read lock.
843 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
844 of 0600. This has been changed to use the value of the lockfile_mode
845 option (which defaults to 0600).
847 PH/08 Applied small patch from the Sieve maintainer.
849 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
850 folder from quota calculations, a direct delivery into this folder messed
851 up the contents of the maildirsize file. This was because the regex was
852 used only to exclude .Trash (or whatever) when the size of the mailbox
853 was calculated. There was no check that a delivery was happening into an
854 excluded directory. This bug has been fixed by ignoring all quota
855 processing for deliveries into excluded directories.
857 PH/10 Added the maildirfolder_create_regex option to appendfile.
863 PH/01 The code for finding all the local interface addresses on a FreeBSD
864 system running IPv6 was broken. This may well have applied to all BSD
865 systems, as well as to others that have similar system calls. The broken
866 code found IPv4 interfaces correctly, but gave incorrect values for the
867 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
868 that it would not match correctly against @[] and not recognize the IPv6
871 PH/02 The ipliteral router was not recognizing addresses of the form user@
872 [ipv6:....] because it didn't know about the "ipv6:" prefix.
874 PH/03 Added disable_ipv6.
876 PH/04 Changed $reply_address to use the raw form of the headers instead of the
877 decoded form, because it is most often used to construct To: headers
878 lines in autoreplies, and the decoded form may well be syntactically
879 invalid. However, $reply_address has leading white space removed, and all
880 newlines turned into spaces so that the autoreply transport does not
883 PH/05 If group was specified without a user on a router, and no group or user
884 was specified on a transport, the group from the router was ignored.
886 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
887 for visible compile-time settings that can be used to change these
888 numbers, for those that want even more. Backwards compatibility with old
889 spool files has been maintained. However, going back to a previous Exim
890 release will lost any variables that are in spool files.
892 PH/07 Two small changes when running in the test harness: increase delay when
893 passing a TCP/IP connection to a new process, in case the original
894 process has to generate a bounce, and remove special handling of
895 127.0.0.2 (sic), which is no longer necessary.
897 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
898 be the same on different OS.
900 PH/09 Moved a debug statement in filter processing to avoid a race problem when
903 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
904 whether --show-vars was specified or not
906 JJ/02 exipick: Added support for new ACL variable spool format introduced
909 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
910 syntactically invalid From: or Reply-to: line, and a filter used this to
911 generate an autoreply, and therefore failed to obtain an address for the
912 autoreply, Exim could try to deliver to a non-existent relative file
913 name, causing unrelated and misleading errors. What now happens is that
914 it logs this as a hard delivery error, but does not attempt to create a
917 PH/11 The exinext utility has a -C option for testing purposes, but although
918 the given file was scanned by exinext itself; it wasn't being passed on
919 when Exim was called.
921 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
922 an end-of-file indication when reading a command response.
924 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
925 compiled. In many other places in Exim, IPv6 addresses are always
926 recognized, so I have changed this. It also means that IPv4 domain
927 literals of the form [IPV4:n.n.n.n] are now always recognized.
929 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
930 used if the router is not running as root, for example, when verifying at
931 ACL time, or when using -bh. The debugging output from this situation was
932 non-existent - all you got was a failure to exec. I have made two
935 (a) Failures to set uid/gid, the current directory, or a process leader
936 in a subprocess such as that created by queryprogram now generate
937 suitable debugging ouput when -d is set.
939 (b) The queryprogram router detects when it is not running as root,
940 outputs suitable debugging information if -d is set, and then runs
941 the subprocess without attempting to change uid/gid.
943 PH/15 Minor change to Makefile for building test_host (undocumented testing
946 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
947 additional section of a DNS packet that returns MX or SRV records.
948 Instead, it always explicitly searches for A/AAAA records. This avoids
949 major problems that occur when a DNS server includes only records of one
950 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
951 fixed another bug: if SRV records were looked up and the corresponding
952 address records were *not* found in the additional section, the port
953 values from the SRV records were lost.
955 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
956 using the correct key (the original address) when searching the retry
957 rules in order to find which one to use for generating the retry hint.
959 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
960 adding the default one. Similarly, if it contains a Reply-To: header, the
961 errors_reply_to option, if set, is not used.
963 PH/19 When calculating a retry time, Exim used to measure the "time since
964 failure" by looking at the "first failed" field in the retry record. Now
965 it does not use this if it is later than than the arrival time of the
966 message. Instead it uses the arrival time. This makes for better
967 behaviour in cases where some deliveries succeed, thus re-setting the
968 "first failed" field. An example is a quota failure for a huge message
969 when small messages continue to be delivered. Without this change, the
970 "time since failure" will always be short, possible causing more frequent
971 delivery attempts for the huge message than are intended.
972 [Note: This change was subsequently modified - see PH/04 for 4.62.]
974 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
975 $1, $2, $3) because the numerical variables can be reset during some
976 expansion items (e.g. "match"), thereby losing the authentication data.
978 PH/21 Make -bV show the size of off_t variables so that the test suite can
979 decide whether to run tests for quotas > 2G.
981 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
982 mailbox_size, and mailbox_filecount in the appendfile transport. If a
983 filecount value is greater than 2G or if a quota value is greater than 2G
984 on a system where the size of off_t is not greater than 4, a panic error
987 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
988 never match. The debug and -bh output now contains an explicit error
989 message indicating a malformed IPv4 address or mask.
991 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
992 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
995 PH/25 Do not write to syslog when running in the test harness. The only
996 occasion when this arises is a failure to open the main or panic logs
997 (for which there is an explicit test).
999 PH/26 Added the /no_tell option to "control=freeze".
1001 PH/27 If a host name lookup failed very early in a connection, for example, if
1002 the IP address matched host_lookup and the reverse lookup yielded a name
1003 that did not have a forward lookup, an error message of the form "no IP
1004 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1005 could be logged. Now it outputs the IP address instead of "NULL".
1007 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1008 allows the sender and the authenticated sender to be set when
1009 submitting a message from within Exim. Since child_open_exim() is
1010 documented for local_scan(), the new function should be too.
1012 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1013 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1014 results in an empty string is now treated as unset.
1016 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1018 PH/31 Added sender_verify_fail logging option.
1020 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1021 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1022 tidied the source and removed it altogether.
1024 PH/33 When a queue run was abandoned because the load average was too high, a
1025 log line was always written; now it is written only if the queue_run log
1026 selector is set. In addition, the log line for abandonment now contains
1027 information about the queue run such as the pid. This is always present
1028 in "start" and "stop" lines but was omitted from the "abandon" line.
1030 PH/34 Omit spaces between a header name and the colon in the error message that
1031 is given when verify = headers_syntax fails (if there are lots of them,
1032 the message gets confusing).
1034 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1035 names, as there are now some PTR records that contain slashes. This check
1036 is only to protect against broken name servers that fall over on strange
1037 characters, so the fact that it applies to all lookups doesn't matter.
1039 PH/36 Now that the new test suite is complete, we can remove some of the
1040 special code in Exim that was needed for the old test suite. For example,
1041 sorting DNS records because real resolvers return them in an arbitrary
1042 order. The new test suite's fake resolver always returns records in the
1045 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1046 bounces) except when queue_only is set, to avoid logging races between
1047 the different processes.
1049 PH/38 Panic-die if .include specifies a non-absolute path.
1051 PH/39 A tweak to the "H" retry rule from its user.
1053 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1054 a label. They prevented compilation on older perls.
1056 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1057 a warning to be raised on newish perls.
1059 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1060 on queue. Changes to match documented behaviour of showing count of
1061 messages matching specified criteria.
1063 PH/40 Changed the default ident timeout from 30s to 5s.
1065 PH/41 Added support for the use of login_cap features, on those BSD systems
1066 that have them, for controlling the resources used by pipe deliveries.
1068 PH/42 The content-scanning code uses fopen() to create files in which to put
1069 message data. Previously it was not paying any attention to the mode of
1070 the files. Exim runs with umask(0) because the rest of the code creates
1071 files with open(), and sets the required mode explicitly. Thus, these
1072 files were ending up world-writeable. This was not a big issue, because,
1073 being within the spool directory, they were not world-accessible. I have
1074 created a function called modefopen, which takes an additional mode
1075 argument. It sets umask(777), creates the file, chmods it to the required
1076 mode, then resets the umask. All the relevant calls to fopen() in the
1077 content scanning code have been changed to use this function.
1079 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1080 to 24 hours. This avoids potential overflow problems when processing G
1081 and H retry rules. I suspect nobody ever tinkers with this value.
1083 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1085 PH/45 When the plaintext authenticator is running as a client, the server's
1086 challenges are checked to ensure they are valid base64 strings. By
1087 default, the authentication attempt is cancelled if an invalid string is
1088 received. Setting client_ignore_invalid_base64 true ignores these errors.
1089 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1090 they are received. Thus, the responses can be made to depend on the
1091 challenges. If an invalid string is ignored, an empty string is placed in
1094 PH/46 Messages that are created by the autoreply transport now contains a
1095 References: header, in accordance with RFCs 2822 and 3834.
1097 PH/47 Added authenticated_sender_force to the smtp transport.
1099 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1101 PH/49 Installed latest patch from the Sieve maintainer.
1103 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1104 was also set, the appendfile transport was unnecessarily scanning a
1105 directory of message files (e.g. for maildir delivery) to find the count
1106 of files (along with the size), even though it did not need this
1107 information. It now does the scan only if it needs to find either the
1108 size of the count of files.
1110 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1112 PH/52 Two bugs concerned with error handling when the smtp transport is
1115 (i) Exim was not creating retry information for temporary errors given
1116 for individual recipients after the DATA command when the smtp transport
1117 was used in LMTP mode. This meant that they could be retried too
1118 frequently, and not timed out correctly.
1120 (ii) Exim was setting the flag that allows error details to be returned
1121 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1122 recipients that were returned after the DATA command.
1124 PH/53 This is related to PH/52, but is more general: for any failing address,
1125 when detailed error information was permitted to be returned to the
1126 sender, but the error was temporary, then after the final timeout, only
1127 "retry timeout exceeded" was returned. Now it returns the full error as
1128 well as "retry timeout exceeded".
1130 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1131 do this, and (what is worse) MTAs that accept it.
1133 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1134 will now be deprecated.
1136 PH/56 New os.c-cygwin from the Cygwin maintainer.
1138 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1139 formats (previously only available in exim formats via -bpr, -bpru,
1140 and -bpra. Now also available in native and exiqgrep formats)
1142 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1143 with very large, slow to parse queues
1145 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1147 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1149 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1150 responses to authentication challenges, though it was showing the
1151 challenges; (ii) I've removed the CR characters from the debug output for
1154 PH/58 Allow for the insertion of a newline as well as a space when a string
1155 is turned into more than one encoded-word during RFC 2047 encoding. The
1156 Sieve code now uses this.
1158 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1159 data_4xx, lost_connection, tls_required.
1161 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1162 message was being sent as an SMTP response.
1164 PH/61 Add -l and -k options to exicyclog.
1166 PH/62 When verifying, if an address was redirected to one new address, so that
1167 verification continued, and the new address failed or deferred after
1168 having set something in $address_data, the value of $address_data was not
1169 passed back to the ACL. This was different to the case when no
1170 redirection occurred. The value is now passed back in both cases.
1172 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1173 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1174 use login_cap.h, so on its own it isn't the distinguishing feature. The
1175 new name refers directly to the setclassresources() function.
1177 PH/65 Added configuration files for NetBSD3.
1179 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1181 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1182 is preferred over IPv4.
1184 PH/68 The bounce_return_message and bounce_return_body options were not being
1185 honoured for bounces generated during the reception of non-SMTP messages.
1186 In particular, this applied to messages rejected by the ACL. This bug has
1187 been fixed. However, if bounce_return_message is true and bounce_return_
1188 body is false, the headers that are returned for a non-SMTP message
1189 include only those that have been read before the error was detected.
1190 (In the case of an ACL rejection, they have all been read.)
1192 PH/69 The HTML version of the specification is now built in a directory called
1193 spec_html instead of spec.html, because the latter looks like a path with
1194 a MIME-type, and this confuses some software.
1196 PH/70 Catch two compiler warnings in sieve.c.
1198 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1199 function verify_get_ident() calls ip_connect() to connect a socket, but
1200 if the "connect()" function timed out, ip_connect() used to close the
1201 socket. However, verify_get_ident() also closes the socket later, and in
1202 between Exim writes to the log, which may get opened at this point. When
1203 the socket was closed in ip_connect(), the log could get the same file
1204 descriptor number as the socket. This naturally causes chaos. The fix is
1205 not to close the socket in ip_connect(); the socket should be closed by
1206 the function that creates it. There was only one place in the code where
1207 this was missing, in the iplookup router, which I don't think anybody now
1208 uses, but I've fixed it anyway.
1210 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1211 well as to direct DNS lookups. Otherwise the handling of names in host
1212 lists is inconsistent and therefore confusing.
1218 PH/01 Two changes to the default runtime configuration:
1220 (1) Move the checks for relay_from_hosts and authenticated clients from
1221 after to before the (commented out) DNS black list checks.
1223 (2) Add control=submission to the relay_from_hosts and authenticated
1224 clients checks, on the grounds that messages accepted by these
1225 statements are most likely to be submissions.
1227 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1229 (1) Generate an error if the third argument for the ${prvs expansion is
1232 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1235 (3) Reset the variables that are obtained from the first argument of
1236 ${prvscheck and used in the second argument before leaving the code,
1237 because their memory is reclaimed, so using them afterwards may do
1240 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1241 one (it's much easier than Tom thought :-).
1243 (5) Because of (4), we can now allow for the use of $prvscheck_result
1244 inside the third argument.
1246 PH/03 For some reason, the default setting of PATH when running a command from
1247 a pipe transport was just "/usr/bin". I have changed it to
1250 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1251 anything to be listed in the output from -bV.
1253 PH/05 When a filter generated an autoreply, the entire To: header line was
1254 quoted in the delivery log line, like this:
1256 => >A.N.Other <ano@some.domain> <original@ddress> ...
1258 This has been changed so that it extracts the operative address. There
1259 may be more than one such address. If so, they are comma-separated, like
1262 => >ano@some.domain,ona@other.domain <original@ddress> ...
1264 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1265 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1266 not being looked up in the rDNS to get a host name, Exim was showing the
1267 IP address twice in Received: lines, even though the IP addresses were
1268 identical. For example:
1270 Received: from [1.2.3.4] (helo=[1.2.3.4])
1272 However, if the real host name was known, it was omitting the HELO data
1273 if it matched the actual IP address. This has been tidied up so that it
1274 doesn't show the same IP address twice.
1276 PH/07 When both +timestamp and +memory debugging was on, the value given by
1277 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1278 called by the debug printing, thereby overwriting the timestamp buffer.
1279 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1281 PH/08 When the original message was included in an autoreply transport, it
1282 always said "this is a copy of the message, including all the headers",
1283 even if body_only or headers_only was set. It now gives an appropriate
1286 PH/09 Applied a patch from the Sieve maintainer which:
1288 o fixes some comments
1289 o adds the (disabled) notify extension core
1290 o adds some debug output for the result of if/elsif tests
1291 o points to the current vacation draft in the documentation
1292 and documents the missing references header update
1296 o fixes a bug in processing the envelope test (when testing
1297 multiple envelope elements, the last element determinted the
1300 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1301 Electronic Mail") by including:
1303 Auto-submitted: auto-generated
1305 in the messages that it generates (bounce messages and others, such as
1306 warnings). In the case of bounce messages for non-SMTP mesages, there was
1307 also a typo: it was using "Auto_submitted" (underscore instead of
1308 hyphen). Since every message generated by Exim is necessarily in response
1309 to another message, thes have all been changed to:
1311 Auto-Submitted: auto-replied
1313 in accordance with these statements in the RFC:
1315 The auto-replied keyword:
1317 - SHOULD be used on messages sent in direct response to another
1318 message by an automatic process,
1320 - MUST NOT be used on manually-generated messages,
1322 - MAY be used on Delivery Status Notifications (DSNs) and Message
1323 Disposition Notifications (MDNs),
1325 - MUST NOT be used on messages generated by automatic or periodic
1326 processes, except for messages which are automatic responses to
1329 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1330 to the default Received: header definition.
1332 PH/12 Added log selector acl_warn_skipped (default on).
1334 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1335 variables because (a) they are in the wrong storage pool and (b) even if
1336 they were copied, it wouldn't work properly because of the caching.
1338 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1339 checking when decoding. Apparently there are clients that generate
1340 overlong encoded strings. Why am I not surprised?
1342 PH/15 If the first argument of "${if match_address" was not empty, but did not
1343 contain an "@" character, Exim crashed. Now it writes a panic log message
1344 and treats the condition as false.
1346 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1348 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1349 extension "envelope-auth". The code is finished and in agreement with
1350 other implementations, but there is no documentation so far and in fact,
1351 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1352 not changing the active code.
1354 Print executed "if" and "elsif" statements when debugging is used. This
1355 helps a great deal to understand what a filter does.
1357 Document more things not specified clearly in RFC3028. I had all this
1358 sorted out, when out of a sudden new issues came to my mind. Oops."
1360 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1363 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1364 canonical form (as documented). However, after a host name lookup from
1365 the IP address, check_host() was doing a simple string comparison with
1366 addresses acquired from the DNS when checking that the found name did
1367 have the original IP as one of its addresses. Since any found IPv6
1368 addresses are likely to be in abbreviated form, the comparison could
1369 fail. Luckily, there already exists a function for doing the comparison
1370 by converting both addresses to binary, so now that is used instead of
1371 the text comparison.
1373 PH/20 There was another similar case to PH/19, when a complete host name was
1374 given in a host list; looking up its IP address could give an abbreviated
1375 form, whereas the current host's name might or might not be abbreviated.
1376 The same fix has been applied.
1382 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1383 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1386 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1387 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1389 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1391 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1392 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1393 Also, for "Auto-Submitted", treat anything other than "no" as
1394 non-personal, in accordance with RFC 3834. (Previously it treated
1395 anything starting "auto-" as non-personal.)
1397 TF/01 The control=submission/name=... option had a problem with syntax
1398 errors if the name included a slash character. The /name= option
1399 now slurps the rest of the string, so it can include any characters
1400 but it must come last in the list of options (after /sender_retain
1403 PH/05 Some modifications to the interface to the fake nameserver for the new
1411 TK/01 Added the "success_on_redirect" address verification option. See
1412 NewStuff for rationale and an example.
1414 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1416 PH/02 Patch to exigrep to allow it to work on syslog lines.
1418 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1419 fread() to skip over the body file's header line, because in Cygwin the
1420 header line is locked and is inaccessible.
1422 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1423 co-exist for some time) to make it clear that it is the Exim ID that is
1424 referenced, not the Message-ID: header line.
1426 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1427 string_format() function, because snprintf() does not exist on all
1430 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1431 ${stat: expansion item.
1433 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1434 protocol synchronization error", to keep the pedants happy.
1436 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1437 well as for IRIX systems, when gcc is being used. See the host.c source
1440 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1442 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1445 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1446 transport and to the smtp transport in LMTP mode.
1448 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1450 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1451 run a filter in a subprocess. This could lead to confusion in subsequent
1452 lookups in the parent process. There should also be a search_tidyup() at
1453 the end of the subprocess.
1455 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1456 only if the host matched helo_try_verify_hosts, which caused the
1457 verification to occur when the EHLO/HELO command was issued. The ACL just
1458 tested the remembered result. Now, if a previous verification attempt has
1459 not happened, "verify = helo" does it there and then.
1461 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1463 TK/03 Fix log output including CR from clamd.
1465 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1466 exist provoked a memory error which could cause a segfault.
1468 PH/15 Installed PCRE 6.2
1470 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1472 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1473 of the problem. Specifically, suggested +O2 rather than +O1 for the
1476 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1478 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1479 record, the port was not correctly logged when the outgoing_port log
1480 selector was set (it logged the transort's default port).
1482 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1483 fallback_hosts, and "hosts" in the smtp transport.
1485 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1486 host errors such as "Connection refused".
1488 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1489 authentication with radiusclient 0.4.9:
1491 - Error returned from rc_read_config was caught wrongly
1492 - Username/password not passed on to radius server due to wrong length.
1494 The presumption is that some radiusclient API changes for 4.51/PH/17
1495 were not taken care of correctly. The code is still untested by me (my
1496 Linux distribution still has 0.3.2 of radiusclient), but it was
1497 contributed by a Radius user.
1499 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1500 expanding the "port" option of the smtp transport.
1502 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1503 while reading a MIME header. Thanks to Tom Hughes for a patch.
1505 PH/24 Include config.h inside local_scan.h so that configuration settings are
1508 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1509 that in an ACL for RCPT (for example), you can examine exactly what was
1512 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1513 commands, but it was not correctly comparing the address with the actual
1514 client host address. Thus, it would show the EHLO address in Received:
1515 header lines when this was not necessary.
1517 PH/27 Added the % operator to ${eval:}.
1519 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1520 it should be ignoring failures (because with -C, for example, it has lost
1521 privilege). It wasn't ignoring creation failures other than "already
1524 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1527 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1528 because an input line was too long, either on its own, or by virtue of
1529 too many continuations, the temporary file was not being removed, and the
1530 return code was incorrect.
1532 PH/31 Missing "BOOL" in function definition in filtertest.c.
1534 PH/32 Applied Sieve patches from the maintainer.
1536 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1538 PH/33 Added "verify = not_blind".
1540 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1541 Local/Makefile (with some defaults set). These are used in built scripts
1542 such as exicyclog, but they have never been used in the exim_install
1543 script (though there are many overriding facilities there). I have
1544 arranged that the exim_install script now takes note of these two
1547 PH/35 Installed configuration files for Dragonfly.
1549 PH/36 When a locally submitted message by a trusted user did not contain a
1550 From: header, and the sender address was obtained from -f or from an SMTP
1551 MAIL command, and the trusted user did not use -F to supply a sender
1552 name, $originator_name was incorrectly used when constructing a From:
1553 header. Furthermore, $originator_name was used for submission mode
1554 messages from external hosts without From: headers in a similar way,
1555 which is clearly wrong.
1557 PH/37 Added control=suppress_local_fixups.
1559 PH/38 When log_selector = +received_sender was set, and the addition of the
1560 sender made the log line's construction buffer exactly full, or one byte
1561 less than full, an overflow happened when the terminating "\n" was
1564 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1565 when the result of a list match is failure because a DNS lookup failed.
1567 PH/40 RM_COMMAND is now used in the building process.
1569 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1570 the "build-* directories that it finds.
1572 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1573 address in a domain literal was a prefix of an interface address.
1575 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1576 when verifying a sender address, unless rewrite_headers is false.
1578 PH/44 Wrote a long comment about why errors_to addresses are verified as
1579 recipients, not senders.
1581 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1582 the ratelimit ACL was added.
1584 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1586 PH/46 Added extra information about PostgreSQL errors to the error string.
1588 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1589 avoiding the need to install special zones in a real server. This is
1590 backwards compatible; if it can't find the fake resolver, it drops back.
1591 Thus, both old and new test suites can be run.
1593 TF/02 Added util/ratelimit.pl
1595 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1596 clock is set back in time.
1598 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1599 Candler <B.Candler@pobox.com>.
1601 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1602 OK for addresses that are the result of redirections.
1604 PH/48 A number of further additions for the benefit of the new test suite,
1605 including a fake gethostbyname() that interfaces to the fake DNS resolver
1608 TF/06 The fix for widen_domains has also been applied to qualify_single and
1609 search_parents which are the other dnslookup options that can cause
1612 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1615 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1617 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1618 service" if it encountered an MX record with an empty target hostname.
1619 The message is now "an MX or SRV record indicated no SMTP service".
1621 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1622 if the DNS of the sending site is misconfigured. This is quite a
1623 common situation. This change restores the behaviour of treating a
1624 helo verification defer as a failure.
1626 PH/51 If self=fail was set on a router, the bounce message did not include the
1627 actual error message.
1633 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1635 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1636 command itself ended in error, the underlying message about the transport
1637 filter timeout was being overwritten with the pipe command error. Now the
1638 underlying error message should be appended to the second error message.
1640 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1642 PH/02 Reduce the amount of output that "make" produces by default. Full output
1643 can still be requested.
1645 PH/03 The warning log line about a condition test deferring for a "warn" verb
1646 was being output only once per connection, rather than after each
1647 occurrence (because it was using the same function as for successful
1648 "warn" verbs). This seems wrong, so I have changed it.
1650 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1651 it should not have, which might have caused a crash in the right
1652 circumstances, but probably never did.
1654 PH/04 Installed a modified version of Tony Finch's patch to make submission
1655 mode fix the return path as well as the Sender: header line, and to
1656 add a /name= option so that you can make the user's friendly name appear
1659 TF/03 Added the control = fakedefer ACL modifier.
1661 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1662 Mark Lowes for thorough testing.
1664 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1666 TK/03 Merged latest SRS patch from Miles Wilton.
1668 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1669 with the definition in sysexits.h (which is #included earlier).
1670 Fortunately, Exim does not actually use EX_OK. The code used to try to
1671 preserve the sysexits.h value, by assumimg that macro definitions were
1672 scanned for macro replacements. I have been disabused of this notion,
1673 so now the code just undefines EX_OK before #including unistd.h.
1675 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1676 in the smtp transport. When a block could not be written in a single
1677 write() function, the timeout was being re-applied to each part-write.
1678 This seems wrong - if the receiver was accepting one byte at a time it
1679 would take for ever. The timeout is now adjusted when this happens. It
1680 doesn't have to be particularly precise.
1682 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1683 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1685 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1686 without a domain if the check to <postmaster@domain> fails.
1688 SC/01 Eximstats: added -xls and the ability to specify output files
1689 (patch written by Frank Heydlauf).
1691 SC/02 Eximstats: use FileHandles for outputing results.
1693 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1695 SC/04 Eximstats: fixed display of large numbers with -nvr option
1697 SC/05 Eximstats: fixed merging of reports with empty tables.
1699 SC/06 Eximstats: added the -include_original_destination flag
1701 SC/07 Eximstats: removed tabs and trailing whitespace.
1703 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1705 TK/06 MBOX spool code: Add real "From " MBOX separator line
1706 so the .eml file is really in mbox format (even though
1707 most programs do not really care). Patch from Alex Miller.
1709 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1710 The latter is generated from $received_to and is only set if the
1711 message has one envelope recipient. SA can use these headers,
1712 obviously out-of-the-box. Patch from Alex Miller.
1714 PH/08 The ${def test on a variable was returning false if the variable's
1715 value was "0", contrary to what the specification has always said!
1716 The result should be true unless the variable is empty.
1718 PH/09 The syntax error of a character other than { following "${if
1719 def:variable_name" (after optional whitespace) was not being diagnosed.
1720 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1721 accidental colon was present, for example, could give incorrect results.
1723 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1724 result is used (not including appendfile, where other changes are about
1727 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1728 This involved changing a lot of size variables from int to off_t. It
1729 should work with maildirs and everything.
1731 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1732 spamd dying while we are connected to it.
1734 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1737 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1738 function for BDB 4.3.
1740 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1742 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1743 the sources for PCRE have been re-arranged and more files are now
1746 PH/15 The code I had for printing potentially long long variables in PH/11
1747 above was not the best (it lost precision). The length of off_t variables
1748 is now inspected at build time, and an appropriate printing format (%ld
1749 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1750 to be "long long int" or "long int". This is needed for the internal
1751 formatting function string_vformat().
1753 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1754 the configuration file to be ":syslog", then the script "guesses" where
1755 the logs files are, rather than using the compiled in default. In our
1756 case the guess is not the same as the compiled default, so the script
1757 suddenly stopped working when I started to use syslog. The patch checks
1758 to see if log_file_path is "". If so, it attempts to read it from exim
1759 with no configuration file to get the compiled in version, before it
1760 falls back to the previous guessing code."
1762 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1763 implementing BATV in an Exim configuration. See NewStuff for the gory
1766 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1767 Makefile that are specific to HP-UX.
1769 PH/18 If the "use_postmaster" option was set for a recipient callout together
1770 with the "random" option, the postmaster address was used as the MAIL
1771 FROM address for the random test, but not for the subsequent recipient
1772 test. It is now used for both.
1774 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1775 patch removes a few documentation additions to RFC 3028, because the
1776 latest draft now contains them. It adds the new en;ascii-case comparator
1777 and a new error check for 8bit text in MIME parts. Comparator and
1778 require names are now matched exactly. I enabled the subaddress
1779 extension, but it is not well tested yet (read: it works for me)."
1781 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1782 rework some of the code of TK/09 above to avoid the hardwired use of
1783 "%lld" and "long long". Replaced the call to snprintf() with a call to
1786 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1787 records point to non-existent hosts", "retry timeout exceeded", and
1788 "retry time not reached for any host after a long failure period".
1790 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1791 experimental DomainKeys support:
1793 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1794 (2) On an error such as an illegally used "control", the wrong name for
1795 the control was given.
1797 These problems did NOT occur unless DomainKeys support was compiled.
1799 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1801 PH/24 Added ${if match_ip condition.
1803 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1804 databases so that it will be absolutely obvious if a crash occurs in the
1805 DB library. This is a regular occurrence (often caused by mis-matched
1808 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1809 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1810 picked up on a user's system that detects such things. There doesn't seem
1811 to be a gcc warning option for this - only an attribute that has to be
1812 put on the function's prototype. It seems that in Fedora Core 4 they have
1813 set this on a number of new functions. No doubt there will be more in due
1816 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1817 specify a transport. However, if an address that was verified by such a
1818 router was the subject of a callout, Exim crashed because it tried to
1819 read the rcpt_include_affixes from the non-existent transport. Now it
1820 just assumes that the setting of that option is false. This bug was
1821 introduced by 4.51/PH/31.
1823 PH/28 Changed -d+all to exclude +memory, because that information is very
1824 rarely of interest, but it makes the output a lot bigger. People tend to
1825 do -d+all out of habit.
1827 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1828 code in os-type was giving problems when libc.so lives in lib64, like on
1831 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1832 aren't the modern standard, and it seems that some systems' include files
1833 don't always have them. Exim was already checking for some of the newer
1834 ones like T_AAAA, and defining it itself. I've added checks for all the
1835 record types that Exim uses.
1837 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1838 not automatically generating a new one, as it is supposed to. This
1839 prevented TLS from working. If the file did exist, but contained invalid
1840 data, a new version was generated, as expected. It was only the case of a
1841 non-existent file that was broken.
1843 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1844 with a change in libdomainkeys > 0.64.
1846 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1847 from DNS. If the selector record carries the flag, it now has
1848 precedence over the domain-wide flag.
1850 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1852 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1853 the use of a port name that isn't defined in /etc/services) occurred, the
1854 message was deferred as in a normal delivery, and thus remained on the
1855 spool, instead of being failed because of the mua_wrapper setting. This
1856 is now fixed, and I tidied up some of the mua_wrapper messages at the
1859 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1860 the messages in a hash of arrays rather than using individual hashes.
1861 This is a bit cleaner and results in dramatic memory savings, albeit
1862 at a slight CPU cost.
1864 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1865 as requested by Marc Sherman.
1867 SC/10 Eximstats: added histograms for user specified patterns as requested
1870 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1872 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1873 fopen() in the content-scanning modules that did not already have it.
1879 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1880 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1882 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1884 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1886 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1887 to test Sieve filters that use "vacation".
1889 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1890 that changes the way the GnuTLS parameters are stored in the cache file.
1891 The new format can be generated externally. For backward compatibility,
1892 if the data in the cache doesn't make sense, Exim assumes it has read an
1893 old-format file, and it generates new data and writes a new file. This
1894 means that you can't go back to an older release without removing the
1897 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1898 work if there are any delivery delays because "one_time" forces the
1899 parent to be marked "delivered", so its unseen clone is never tried
1900 again. For this reason, Exim now forbids the simultaneous setting of
1903 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1904 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1905 entry if you want to know the details. The fix, however, neglected to
1906 consider the case when local delivery batching is involved. The test for
1907 "previously delivered" was not happening when checking to see if an
1908 address could be batched with a previous (undelivered) one; under
1909 certain circumstances this could lead to multiple deliveries to the same
1912 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1913 in its include files, and this causes problems building Exim.
1915 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1916 header_syntax) but Exim was just ignoring anything given after a slash.
1917 In particular, this caused confusion with an attempt to use "verify =
1918 reverse_host_lookup/defer_ok". An error is now given when options are
1919 supplied for verify items that do not have them. (Maybe reverse_host_
1920 lookup should have a defer_ok option, but that's a different point.)
1922 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1923 defined by RFC 821) to 2048, because there were problems with some AUTH
1924 commands, and RFC 1869 says the size should be increased for extended
1925 SMTP commands that take arguments.
1927 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1930 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1931 "unknown" error; now it says that the functionality isn't in the binary.
1933 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1934 an address' error message when a string expansion fails (syntax or
1935 whatever). Otherwise the password may appear in the log. Following change
1936 PH/42 below, there is no longer a chance of it appearing in a bounce
1939 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1941 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1942 of its addresses was ever tried. (Bugzilla bug #2.)
1944 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1945 the result incorrectly in the debug output. (It correctly added a newline
1946 to what was transported.)
1948 TF/01 Added $received_time.
1950 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1951 commented out examples of how to interface to a virus scanner and to
1952 SpamAssassin. Also added commented examples of av_scanner and
1953 spamd_address settings.
1955 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1956 and controls are allowed in which ACLs. There were a couple of minor
1957 errors. Some of the entries in the conditions table (which is a table of
1958 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1959 negation of where the condition IS allowed.
1961 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1963 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1964 header file does not have a version number, so I've had to invent a new
1965 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1966 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1967 radiusclient), but it was contributed by a Radius user.
1969 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1970 files or directories, for OpenSSL.
1972 PH/19 When an Exim process that is running as root has to create an Exim log
1973 file, it does so in a subprocess that runs as exim:exim so as to get the
1974 ownership right at creation (otherwise, other Exim processes might see
1975 the file with the wrong ownership). There was no test for failure of this
1976 fork() call, which would lead to the process getting stuck as it waited
1977 for a non-existent subprocess. Forks do occasionally fail when resources
1978 run out. I reviewed all the other calls to fork(); they all seem to check
1981 PH/20 When checking for unexpected SMTP input at connect time (before writing
1982 the banner), Exim was not dealing correctly with a non-positive return
1983 from the read() function. If the client had disconnected by this time,
1984 the result was a log entry for a synchronization error with an empty
1985 string after "input=" when read() returned zero. If read() returned -1
1986 (an event I could not check), uninitialized data bytes were printed.
1987 There were reports of junk text (parts of files, etc) appearing after
1990 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1992 PH/22 Added support for macro redefinition, and (re)definition in between
1993 driver and ACL definitions.
1995 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1996 forgetting to use the resulting value; it was using the unexpanded value.
1998 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1999 hadn't been configured. The fix is from Juergen Kreileder, who
2000 understands it better than I do:
2002 "Here's what I see happening with three configured cyrus_sasl
2003 authenticators configured (plain, login, cram-md5):
2005 On startup auth_cyrus_sasl_init() gets called for each of these.
2006 This means three calls to sasl_listmech() without a specified mech_list.
2007 => SASL tests which mechs of all available mechs actually work
2008 => three warnings about OTP not working
2009 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2011 With the patch, sasl_listmech() also gets called three times. But now
2012 SASL's mech_list option is set to the server_mech specified in the the
2013 authenticator. Or in other words, the answer from sasl_listmech()
2014 gets limited to just the mech you're testing for (which is different
2016 => the return list contains just 'plain' or 'login', 'cram-md5' or
2017 nothing depending on the value of ob->server_mech.
2019 I've just tested the patch: Authentication still works fine,
2020 unavailable mechs specified in the exim configuration are still
2021 caught, and the auth.log warnings about OTP are gone."
2023 PH/25 When debugging is enabled, the contents of the command line are added
2024 to the debugging output, even when log_selector=+arguments is not
2027 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2028 answer is "GNU", and only if the return is "GNU/something" is the answer
2031 PH/27 $acl_verify_message is now set immediately after the failure of a
2032 verification in an ACL, and so is available in subsequent modifiers. In
2033 particular, the message can be preserved by coding like this:
2035 warn !verify = sender
2036 set acl_m0 = $acl_verify_message
2038 Previously, $acl_verify_message was set only while expanding "message"
2039 and "log_message" when a very denied access.
2041 PH/28 Modified OS/os.c-Linux with
2043 -#ifndef OS_LOAD_AVERAGE
2044 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2046 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2047 nomenclature these days.)
2049 PH/29 Installed patch from the Sieve maintainer that adds the options
2050 sieve_useraddress and sieve_subaddress to the redirect router.
2052 PH/30 In these circumstances:
2053 . Two addresses routed to the same list of hosts;
2054 . First host does not offer TLS;
2055 . First host accepts first address;
2056 . First host gives temporary error to second address;
2057 . Second host offers TLS and a TLS session is established;
2058 . Second host accepts second address.
2059 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2060 and peerdn, if requested) that were in fact used only for the second
2063 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2064 attention to any local part prefix or suffix that was matched by the
2065 router that accepted the address. It now behaves in the same way as it
2066 does for delivery: the affixes are removed from the local part unless
2067 rcpt_include_affixes is set on the transport.
2069 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2070 timeout during the DATA phase of an incoming message.
2072 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2073 applied a patch sanctioned by the Sieve maintainer.
2075 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2076 the uid or gid is negative. A case of a negative gid caused this to be
2077 noticed. The fix allows for either to be negative.
2079 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2080 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2083 PH/36 The change PH/12 above was broken. Fixed it.
2085 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2086 the grounds that routing the same address twice would always produce the
2087 same answer. This might have been true once, but it is certainly no
2088 longer true now. Routing a child address may depend on the previous
2089 routing that produced that child. Some complicated redirection strategies
2090 went wrong when messages had multiple recipients, and made Exim's
2091 behaviour dependent on the order in which the addresses were given.
2093 I have moved the duplicate checking until after the routing is complete.
2094 Exim scans the addresses that are assigned to local and remote
2095 transports, and removes any duplicates. This means that more work will be
2096 done, as duplicates will always all be routed, but duplicates are
2097 presumably rare, so I don't expect this is of any significance.
2099 For deliveries to pipes, files, and autoreplies, the duplicate checking
2100 still happens during the routing process, since they are not going to be
2103 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2104 It corrects a timeout issue with spamd. This is Ian's comment: "The
2105 background is that sometimes spamd either never reads data from a
2106 connection it has accepted, or it never writes response data. The exiscan
2107 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2108 blindly assumes that writes won't block so it may never time out."
2110 PH/39 Allow G after quota size as well as K and M.
2112 PH/40 The value set for $authenticated_id in an authenticator may not contain
2113 binary zeroes or newlines because the value is written to log lines and
2114 to spool files. There was no check on this. Now the value is run through
2115 the string_printing() function so that such characters are converted to
2116 printable escape sequences.
2118 PH/41 $message_linecount is a new variable that contains the total number of
2119 lines in the message. Compare $body_linecount, which is the count for the
2122 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2123 bounce and delay warning messages, except in certain special cases, which
2126 (a) An SMTP error message from a remote host;
2127 (b) A message specified in a :fail: redirection;
2128 (c) A message specified in a "fail" command in a system filter;
2129 (d) A message specified in a FAIL return from the queryprogram router;
2130 (e) A message specified by the cannot_route_message router option.
2132 In these cases only, Exim does include the error details in bounce and
2133 warning messages. There are also a few cases where bland messages such
2134 as "unrouteable address" or "local delivery error" are given.
2136 PH/43 $value is now also set for the "else" part of a ${run expansion.
2138 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2139 being worked on, but at least Exim now implements the latest version to
2142 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2143 process to complete was treated as a delivery failure, a timeout while
2144 writing the message to the pipe was logged, but erroneously treated as a
2145 successful delivery. Such timeouts include transport filter timeouts. For
2146 consistency with the overall process timeout, these timeouts are now
2147 treated as errors, giving rise to delivery failures by default. However,
2148 there is now a new Boolean option for the pipe transport called
2149 timeout_defer, which, if set TRUE, converts the failures into defers for
2150 both kinds of timeout. A transport filter timeout is now identified in
2153 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2154 systems where "make" and "gmake" are different, calling "gmake" at top
2155 level broke things. I've arranged for the value of $(MAKE) to be passed
2156 from the Makefile to this script so that it can call the same version of
2160 A note about Exim versions 4.44 and 4.50
2161 ----------------------------------------
2163 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2164 changes of various kinds. As a consequence, a big documentation update was
2165 needed. This delayed the release for rather longer than seemed good, especially
2166 in the light of a couple of (minor) security issues. Therefore, the changes
2167 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2168 release. So 4.44 and 4.50 are in effect two different branches that both start
2171 I have left the 4.50 change log unchanged; it contains all the changes since
2172 4.43. The change log for 4.44 is below; many of its items are identical to
2173 those for 4.50. This seems to be the most sensible way to preserve the
2174 historical information.
2180 1. Minor wording change to the doc/README.SIEVE file.
2182 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2183 computation of the current number of files was incorrect.
2185 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2186 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2189 4. Give more explanation in the error message when the command for a transport
2190 filter fails to execute.
2192 5. There are several places where Exim runs a non-Exim command in a
2193 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2194 was being done only for the command run by the queryprogram router. It is
2195 now done for all such subprocesses. The other cases are: ${run, transport
2196 filters, and the commands run by the lmtp and pipe transports.
2198 6. Added CONFIGURE_GROUP build-time option.
2200 7. Some older OS have a limit of 256 on the maximum number of file
2201 descriptors. Exim was using setrlimit() to set 1000 as a large value
2202 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2203 systems. I've change it so that if it can't get 1000, it tries for 256.
2205 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2206 was an oversight, and furthermore, ever since the addition of extra
2207 controls (e.g. 4.43/32), the checks on when to allow different forms of
2208 "control" were broken. There should now be diagnostics for all cases when a
2209 control that does not make sense is encountered.
2211 9. Added the /retain_sender option to "control=submission".
2213 10. $recipients is now available in the predata ACL (oversight).
2215 11. Tidy the search cache before the fork to do a delivery from a message
2216 received from the command line. Otherwise the child will trigger a lookup
2217 failure and thereby defer the delivery if it tries to use (for example) a
2218 cached ldap connection that the parent has called unbind on.
2220 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2221 of $address_data from the recipient verification was clobbered by the
2222 sender verification.
2224 13. The value of address_data from a sender verification is now available in
2225 $sender_address_data in subsequent conditions in the ACL statement.
2227 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2229 15. Added a new option "connect=<time>" to callout options, to set a different
2232 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2233 was its contents. (It was OK if the option was not defined at all.)
2235 17. A "Completed" log line is now written for messages that are removed from
2236 the spool by the -Mrm option.
2238 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2239 information about exactly what failed.
2241 19. Added -dd to debug only the daemon process.
2243 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2244 handles timeouts, both on the server side and network timeouts. Renamed the
2245 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2247 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2248 It is now set to "smtps".
2250 22. $host_address is now set to the target address during the checking of
2251 ignore_target_hosts.
2253 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2254 being passed; this would have caused $sender_host_name to have been used if
2255 matching the list had actually called for a host name (not very likely,
2256 since this list is usually IP addresses). A host name is now passed as
2259 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2260 code that specifies a non-restarting handler (typically sigaction() in
2261 modern systems) in an attempt to fix a rare and obscure crash bug.
2263 25. Narrowed the window for a race in the daemon that could cause it to ignore
2264 SIGCHLD signals. This is not a major problem, because they are used only to
2265 wake it up if nothing else does.
2267 26. A malformed maildirsize file could cause Exim to calculate negative values
2268 for the mailbox size or file count. Odd effects could occur as a result.
2269 The maildirsize information is now recalculated if the size or filecount
2272 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2273 support for a long time. Removed HAVE_SYS_VFS_H.
2275 28. Installed the latest version of exipick from John Jetmore.
2277 29. In an address list, if the pattern was not a regular expression, an empty
2278 subject address (from a bounce message) matched only if the pattern was an
2279 empty string. Non-empty patterns were not even tested. This was the wrong
2280 because it is perfectly reasonable to use an empty address as part of a
2281 database query. An empty address is now tested by patterns that are
2282 lookups. However, all the other forms of pattern expect the subject to
2283 contain a local part and a domain, and therefore, for them, an empty
2284 address still always fails if the pattern is not itself empty.
2286 30. Exim went into a mad DNS loop when attempting to do a callout where the
2287 host was specified on an smtp transport, and looking it up yielded more
2288 than one IP address.
2290 31. Re-factored the code for checking spool and log partition space into a
2291 function that finds that data and another that does the check. The former
2292 is then used to implement four new variables: $spool_space, $log_space,
2293 $spool_inodes, and $log_inodes.
2295 32. The RFC2047 encoding function was originally intended for short strings
2296 such as real names; it was not keeping to the 75-character limit for
2297 encoded words that the RFC imposes. It now respects the limit, and
2298 generates multiple encoded words if necessary. To be on the safe side, I
2299 have increased the buffer size for the ${rfc2047: expansion operator from
2302 33. It is now permitted to omit both strings after an "if" condition; if the
2303 condition is true, the result is "true". As before, when the second string
2304 is omitted, a false condition yields an empty string. This makes it less
2305 cumbersome to write custom ACL and router conditions.
2307 34. Failure to deliver a bounce message always caused it to be frozen, even if
2308 there was an errors_to setting on the router. The errors_to setting is now
2311 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2312 canonical form (fully expanded) before being placed in
2313 $sender_host_address.
2315 36. The table in the code that translates DNS record types into text (T_A to
2316 "A" for instance) was missing entries for NS and CNAME. It is just possible
2317 that this could have caused confusion if both these types were looked up
2318 for the same domain, because the text type is used as part of Exim's
2319 per-process caching. But the chance of anyone hitting this buglet seems
2322 37. The dnsdb lookup has been extended in a number of ways.
2324 (1) There is a new type, "zns", which walks up the domain tree until it
2325 finds some nameserver records. It should be used with care.
2327 (2) There is a new type, "mxh", which is like "mx" except that it returns
2328 just the host names, not the priorities.
2330 (3) It is now possible to give a list of domains (or IP addresses) to be
2331 looked up. The behaviour when one of the lookups defers can be
2332 controlled by a keyword.
2334 (4) It is now possible to specify the separator character for use when
2335 multiple records are returned.
2337 38. The dnslists ACL condition has been extended: it is now possible to supply
2338 a list of IP addresses and/or domains to be looked up in a particular DNS
2341 39. Added log_selector=+queue_time_overall.
2343 40. When running the queue in the test harness, wait just a tad after forking a
2344 delivery process, to get repeatability of debugging output.
2346 41. Include certificate and key file names in error message when GnuTLS fails
2347 to set them up, because the GnuTLS error message doesn't include the name
2348 of the failing file when there is a problem reading it.
2350 42. Allow both -bf and -bF in the same test run.
2352 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2354 44. The "Exiscan patch" is now merged into the mainline Exim source.
2356 45. Sometimes the final signoff response after QUIT could fail to get
2357 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2358 < 0 before doing a fflush(). This bug looks as though it goes back to the
2359 introduction of TLS in release 3.20, but "sometimes" must have been rare
2360 because the tests only now provoked it.
2362 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2363 (this can affect the format of dates).
2365 47. exim_tidydb, when checking for the continued existence of a message for
2366 which it has found a message-specific retry record, was not finding
2367 messages that were in split spool directories. Consequently, it was
2368 deleting retry records that should have stayed in existence.
2370 48. Steve fixed some bugs in eximstats.
2372 49. The SPA authentication driver was not abandoning authentication and moving
2373 on to the next authenticator when an expansion was forced to fail,
2374 contradicting the general specification for all authenticators. Instead it
2375 was generating a temporary error. It now behaves as specified.
2377 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2378 (the order specifies the preference for clients). The order is now AES256,
2379 AES128, 3DES, ARCFOUR128.
2381 51. Small patch to Sieve code - explicitly set From: when generating an
2384 52. Exim crashed if a remote delivery caused a very long error message to be
2385 recorded - for instance if somebody sent an entire SpamAssassin report back
2386 as a large number of 550 error lines. This bug was coincidentally fixed by
2387 increasing the size of one of Exim's internal buffers (big_buffer) that
2388 happened as part of the Exiscan merge. However, to be on the safe side, I
2389 have made the code more robust (and fixed the comments that describe what
2392 53. Now that there can be additional text after "Completed" in log lines (if
2393 the queue_time_overall log selector is set), a one-byte patch to exigrep
2394 was needed to allow it to recognize "Completed" as not the last thing in
2397 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2398 patch that reportedly fixes this has been added. I am not expert enough to
2399 create a test for it. This is what the patch creator wrote:
2401 "I found a little strange behaviour of ldap code when working with
2402 Windows 2003 AD Domain, where users was placed in more than one
2403 Organization Units. When I tried to give exim partial DN, the exit code
2404 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2405 But simultaneously result of request was absolutely normal ldap result,
2406 so I produce this patch..."
2408 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2409 REFERENCE, so I have modified the code to exclude the patch when that macro
2412 55. Some experimental protocols are using DNS PTR records for new purposes. The
2413 keys for these records are domain names, not reversed IP addresses. The
2414 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2415 leaves it alone. Component reversal etc. now happens only for IP addresses.
2418 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2420 57. Double the size of the debug message buffer (to 2048) so that more of very
2421 long debug lines gets shown.
2423 58. The exicyclog utility now does better if the number of log files to keep
2424 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2426 59. Two changes related to the smtp_active_hostname option:
2428 (1) $smtp_active_hostname is now available as a variable.
2429 (2) The default for smtp_banner uses $smtp_active_hostname instead
2430 of $primary_hostname.
2432 60. The host_aton() function is supposed to be passed a string that is known
2433 to be a valid IP address. However, in the case of IPv6 addresses, it was
2434 not checking this. This is a hostage to fortune. Exim now panics and dies
2435 if the condition is not met. A case was found where this could be provoked
2436 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2437 components; fortuitously, this particular loophole had already been fixed
2438 by change 4.50/55 above.
2440 If there are any other similar loopholes, the new check in host_aton()
2441 itself should stop them being exploited. The report I received stated that
2442 data on the command line could provoke the exploit when Exim was running as
2443 exim, but did not say which command line option was involved. All I could
2444 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2445 running as the user.
2448 61. There was a buffer overflow vulnerability in the SPA authentication code
2449 (which came originally from the Samba project). I have added a test to the
2450 spa_base64_to_bits() function which I hope fixes it.
2453 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2454 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2456 63. The daemon start-up calls getloadavg() while still root for those OS that
2457 need the first call to be done as root, but it missed one case: when
2458 deliver_queue_load_max is set with deliver_drop_privilege. This is
2459 necessary for the benefit of the queue runner, because there is no re-exec
2460 when deliver_drop_privilege is set.
2462 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2463 This has been fixed.
2465 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2466 was in use, was not putting the data itself into the right store pool;
2467 consequently, it could be overwritten for a subsequent message in the same
2468 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2471 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2473 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2474 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2475 the function were treating the return as a boolean value, which happened to
2476 work because 0=false and not-0=true, but is not correct code.
2478 68. The host_aton() function was not handling scoped IPv6 addresses (those
2479 with, for example, "%eth0" on the end) correctly.
2481 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2482 negated items (that is, ~something) in unsigned ints. Some compilers
2483 apparently mutter when there is no cast.
2485 70. If an address verification called from an ACL failed, and did not produce a
2486 user-specific message (i.e. there was only a "system" message), nothing was
2487 put in $acl_verify_message. In this situation, it now puts the system
2490 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2491 session; change 4.31/43 added the unwanted input to the log line - except
2492 that it did not do this in the start of session case. It now does.
2494 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2495 This is wrong and can cause the other end to generate a synchronization
2496 error if it is another Exim or anything else that does the synchronization
2497 check. A QUIT command is no longer sent after a timeout.
2499 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2500 during host lookups.
2502 74. The defer_ok option of callout verification was not working if it was used
2503 when verifying addresses in header lines, that is, for this case:
2505 verify = header_sender/callout=defer_ok
2507 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2508 those file descriptors could be used for SMTP connections. If anything
2509 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2510 could be sent to the SMTP client, causing chaos. The daemon now opens
2511 stdin, stdout, and stderr to /dev/null when it puts itself into the
2514 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2515 log by default. The user can override this with suitable Perl magic.
2517 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2518 the log message when discard triggers, was not working for the DATA ACL or
2519 for the non-SMTP ACL.
2521 78. Error message wording change in sieve.c.
2523 79. If smtp_accept_max_per_host was set, the number of connections could be
2524 restricted to fewer than expected, because the daemon was trying to set up
2525 a new connection before checking whether the processes handling previous
2526 connections had finished. The check for completed processes is now done
2527 earlier. On busy systems, this bug wouldn't be noticed because something
2528 else would have woken the daemon, and it would have reaped the completed
2531 80. If a message was submitted locally by a user whose login name contained one
2532 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2533 It caused a spool format error. I have fixed the spool reading code. A
2534 related problem was that the "from" clause in the Received: line became
2535 illegal because of the space(s). It is now covered by ${quote_local_part.
2537 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2540 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2542 83. Patch from Sieve maintainer to fix unterminated string problem in
2543 "vacation" handling.
2545 84. Some minor changes to the Linux configuration files to help with other
2546 OS variants using glibc.
2548 85. One more patch for Sieve to update vacation handling to latest spec.
2551 ----------------------------------------------------
2552 See the note above about the 4.44 and 4.50 releases.
2553 ----------------------------------------------------
2559 1. Change 4.43/35 introduced a bug that caused file counts to be
2560 incorrectly computed when quota_filecount was set in an appendfile
2563 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2564 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2567 3. Give more explanation in the error message when the command for a transport
2568 filter fails to execute.
2570 4. There are several places where Exim runs a non-Exim command in a
2571 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2572 was being done only for the command run by the queryprogram router. It is
2573 now done for all such subprocesses. The other cases are: ${run, transport
2574 filters, and the commands run by the lmtp and pipe transports.
2576 5. Some older OS have a limit of 256 on the maximum number of file
2577 descriptors. Exim was using setrlimit() to set 1000 as a large value
2578 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2579 systems. I've change it so that if it can't get 1000, it tries for 256.
2581 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2582 was an oversight, and furthermore, ever since the addition of extra
2583 controls (e.g. 4.43/32), the checks on when to allow different forms of
2584 "control" were broken. There should now be diagnostics for all cases when a
2585 control that does not make sense is encountered.
2587 7. $recipients is now available in the predata ACL (oversight).
2589 8. Tidy the search cache before the fork to do a delivery from a message
2590 received from the command line. Otherwise the child will trigger a lookup
2591 failure and thereby defer the delivery if it tries to use (for example) a
2592 cached ldap connection that the parent has called unbind on.
2594 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2595 of $address_data from the recipient verification was clobbered by the
2596 sender verification.
2598 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2599 was its contents. (It was OK if the option was not defined at all.)
2601 11. A "Completed" log line is now written for messages that are removed from
2602 the spool by the -Mrm option.
2604 12. $host_address is now set to the target address during the checking of
2605 ignore_target_hosts.
2607 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2608 being passed; this would have caused $sender_host_name to have been used if
2609 matching the list had actually called for a host name (not very likely,
2610 since this list is usually IP addresses). A host name is now passed as
2613 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2614 code that specifies a non-restarting handler (typically sigaction() in
2615 modern systems) in an attempt to fix a rare and obscure crash bug.
2617 15. Narrowed the window for a race in the daemon that could cause it to ignore
2618 SIGCHLD signals. This is not a major problem, because they are used only to
2619 wake it up if nothing else does.
2621 16. A malformed maildirsize file could cause Exim to calculate negative values
2622 for the mailbox size or file count. Odd effects could occur as a result.
2623 The maildirsize information is now recalculated if the size or filecount
2626 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2627 support for a long time. Removed HAVE_SYS_VFS_H.
2629 18. Updated exipick to current release from John Jetmore.
2631 19. Allow an empty sender to be matched against a lookup in an address list.
2632 Previously the only cases considered were a regular expression, or an
2635 20. Exim went into a mad DNS lookup loop when doing a callout where the
2636 host was specified on the transport, if the DNS lookup yielded more than
2639 21. The RFC2047 encoding function was originally intended for short strings
2640 such as real names; it was not keeping to the 75-character limit for
2641 encoded words that the RFC imposes. It now respects the limit, and
2642 generates multiple encoded words if necessary. To be on the safe side, I
2643 have increased the buffer size for the ${rfc2047: expansion operator from
2646 22. Failure to deliver a bounce message always caused it to be frozen, even if
2647 there was an errors_to setting on the router. The errors_to setting is now
2650 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2651 canonical form (fully expanded) before being placed in
2652 $sender_host_address.
2654 24. Updated eximstats to version 1.33
2656 25. Include certificate and key file names in error message when GnuTLS fails
2657 to set them up, because the GnuTLS error message doesn't include the name
2658 of the failing file when there is a problem reading it.
2660 26. Expand error message when OpenSSL has problems setting up cert/key files.
2663 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2664 (this can affect the format of dates).
2666 28. exim_tidydb, when checking for the continued existence of a message for
2667 which it has found a message-specific retry record, was not finding
2668 messages that were in split spool directories. Consequently, it was
2669 deleting retry records that should have stayed in existence.
2671 29. eximstats updated to version 1.35
2672 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2673 1.35 - bugfix such that pie charts by volume are generated correctly
2675 30. The SPA authentication driver was not abandoning authentication and moving
2676 on to the next authenticator when an expansion was forced to fail,
2677 contradicting the general specification for all authenticators. Instead it
2678 was generating a temporary error. It now behaves as specified.
2680 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2681 (the order specifies the preference for clients). The order is now AES256,
2682 AES128, 3DES, ARCFOUR128.
2684 31. Small patch to Sieve code - explicitly set From: when generating an
2687 32. Exim crashed if a remote delivery caused a very long error message to be
2688 recorded - for instance if somebody sent an entire SpamAssassin report back
2689 as a large number of 550 error lines. This bug was coincidentally fixed by
2690 increasing the size of one of Exim's internal buffers (big_buffer) that
2691 happened as part of the Exiscan merge. However, to be on the safe side, I
2692 have made the code more robust (and fixed the comments that describe what
2695 33. Some experimental protocols are using DNS PTR records for new purposes. The
2696 keys for these records are domain names, not reversed IP addresses. The
2697 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2698 leaves it alone. Component reversal etc. now happens only for IP addresses.
2701 34. The host_aton() function is supposed to be passed a string that is known
2702 to be a valid IP address. However, in the case of IPv6 addresses, it was
2703 not checking this. This is a hostage to fortune. Exim now panics and dies
2704 if the condition is not met. A case was found where this could be provoked
2705 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2706 components; fortuitously, this particular loophole had already been fixed
2707 by change 4.50/55 or 4.44/33 above.
2709 If there are any other similar loopholes, the new check in host_aton()
2710 itself should stop them being exploited. The report I received stated that
2711 data on the command line could provoke the exploit when Exim was running as
2712 exim, but did not say which command line option was involved. All I could
2713 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2714 running as the user.
2717 35. There was a buffer overflow vulnerability in the SPA authentication code
2718 (which came originally from the Samba project). I have added a test to the
2719 spa_base64_to_bits() function which I hope fixes it.
2722 36. The daemon start-up calls getloadavg() while still root for those OS that
2723 need the first call to be done as root, but it missed one case: when
2724 deliver_queue_load_max is set with deliver_drop_privilege. This is
2725 necessary for the benefit of the queue runner, because there is no re-exec
2726 when deliver_drop_privilege is set.
2728 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2729 was in use, was not putting the data itself into the right store pool;
2730 consequently, it could be overwritten for a subsequent message in the same
2731 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2734 38. Sometimes the final signoff response after QUIT could fail to get
2735 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2736 < 0 before doing a fflush(). This bug looks as though it goes back to the
2737 introduction of TLS in release 3.20, but "sometimes" must have been rare
2738 because the tests only now provoked it.
2744 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2745 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2746 Now it returns an integer. A number of calls were still expecting a T/F
2747 return. Fortuitously, in all cases, the tests worked in OK situations,
2748 which is the norm. However, things would have gone wrong on any write
2749 failures on the smtp file descriptor. This function is used when sending
2750 messages over SMTP and also when doing verify callouts.
2752 2. When Exim is called to do synchronous delivery of a locally submitted
2753 message (the -odf or -odi options), it no longer closes stderr before doing
2756 3. Implemented the mua_wrapper option.
2758 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2760 5. Implemented the functions header_remove(), header_testname(),
2761 header_add_at_position(), and receive_remove_recipient(), and exported them
2764 6. If an ACL "warn" statement specified the addition of headers, Exim already
2765 inserted X-ACL-Warn: at the start if there was no header name. However, it
2766 was not making this test for the second and subsequent header lines if
2767 there were newlines in the string. This meant that an invalid header could
2768 be inserted if Exim was badly configured.
2770 7. Allow an ACL "warn" statement to add header lines at the start or after all
2771 the Received: headers, as well as at the end.
2773 8. Added the rcpt_4xx retry error code.
2775 9. Added postmaster_mailfrom=xxx to callout verification option.
2777 10. Added mailfrom=xxxx to the callout verification option, for verify=
2780 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2781 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2783 12. Inserted some casts to stop certain compilers warning when using pointer
2784 differences as field lengths or precisions in printf-type calls (mostly
2785 affecting debugging statements).
2787 13. Added optional readline() support for -be (dynamically loaded).
2789 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2790 same clock tick as a message's arrival, so that its received time was the
2791 same as the "first fail" time on the retry record, and that message
2792 remained on the queue past the ultimate address timeout, every queue runner
2793 would try a delivery (because it was past the ultimate address timeout) but
2794 after another failure, the ultimate address timeout, which should have then
2795 bounced the address, did not kick in. This was a "< instead of <=" error;
2796 in most cases the first failure would have been in the next clock tick
2797 after the received time, and all would be well.
2799 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2800 being recognized when the domain list was tested by the match_domain
2801 condition in an expansion string.
2803 16. Added the ${str2b64: operator.
2805 17. Exim was always calling setrlimit() to set a large limit for the number of
2806 processes, without checking whether the existing limit was already
2807 adequate. (It did check for the limit on file descriptors.) Furthermore,
2808 errors from getrlimit() and setrlimit() were being ignored. Now they are
2809 logged to the main and panic logs, but Exim does carry on, to try to do its
2810 job under whatever limits there are.
2812 18. Imported PCRE 5.0.
2814 19. Trivial typo in log message " temporarily refused connection" (the leading
2817 20. If the log selector return_path_on_delivery was set and an address was
2818 redirected to /dev/null, the delivery process crashed because it assumed
2819 that a return path would always be set for a "successful" delivery. In this
2820 case, the whole delivery is bypassed as an optimization, and therefore no
2823 21. Internal re-arrangement: the function for sending a challenge and reading
2824 a response while authentication was assuming a zero-terminated challenge
2825 string. It's now changed to take a pointer and a length, to allow for
2826 binary data in such strings.
2828 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2830 23. Exim was not respecting finduser_retries when seeking the login of the
2831 uid under which it was called; it was always trying 10 times. (The default
2832 setting of finduser_retries is zero.) Also, it was sleeping after the final
2833 failure, which is pointless.
2835 24. Implemented tls_on_connect_ports.
2837 25. Implemented acl_smtp_predata.
2839 26. If the domain in control=submission is set empty, Exim assumes that the
2840 authenticated id is a complete email address when it generates From: or
2841 Sender: header lines.
2843 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2844 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2845 chown and chgrp in /bin and hostname in /usr/bin.
2847 28. Exim was keeping the "process log" file open after each use, just as it
2848 does for the main log. This opens the possibility of it remaining open for
2849 long periods when the USR1 signal hits a daemon. Occasional processlog
2850 errors were reported, that could have been caused by this. Anyway, it seems
2851 much more sensible not to leave this file open at all, so that is what now
2854 29. The long-running daemon process does not normally write to the log once it
2855 has entered its main loop, and it closes the log before doing so. This is
2856 so that log files can straightforwardly be renamed and moved. However,
2857 there are a couple of unusual error situations where the daemon does write
2858 log entries, and I had neglected to close the log afterwards.
2860 30. The text of an SMTP error response that was received during a remote
2861 delivery was being truncated at 512 bytes. This is too short for some of
2862 the long messages that one sometimes sees. I've increased the limit to
2865 31. It is now possible to make retry rules that apply only when a message has a
2866 specific sender, in particular, an empty sender.
2868 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2869 it possible to be selective about when SMTP synchronization is enforced.
2871 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2873 32. Implemented hosts_connection_nolog.
2875 33. Added an ACL for QUIT.
2877 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2880 35. Added mailbox_size and mailbox_filecount to appendfile.
2882 36. Added control = no_multiline_responses to ACLs.
2884 37. There was a bug in the logic of the code that waits for the clock to tick
2885 in the case where the clock went backwards by a substantial amount such
2886 that the microsecond fraction of "now" was more than the microsecond
2887 fraction of "then" (but the whole seconds number was less).
2889 38. Added support for the libradius Radius client library this is found on
2890 FreeBSD (previously only the radiusclient library was supported).
2896 1. When certain lookups returned multiple values in the form name=value, the
2897 quoting of the values was not always being done properly. Specifically:
2898 (a) If the value started with a double quote, but contained no whitespace,
2900 (b) If the value contained whitespace other than a space character (i.e.
2901 tabs or newlines or carriage returns) it was not quoted.
2902 This fix has been applied to the mysql and pgsql lookups by writing a
2903 separate quoting function and calling it from the lookup code. The fix
2904 should probably also be applied to nisplus, ibase and oracle lookups, but
2905 since I cannot test any of those, I have not disturbed their existing code.
2907 2. A hit in the callout cache for a specific address caused a log line with no
2908 reason for rejecting RCPT. Now it says "Previous (cached) callout
2909 verification failure".
2911 3. There was an off-by-one bug in the queryprogram router. An over-long
2912 return line was truncated at 256 instead of 255 characters, thereby
2913 overflowing its buffer with the terminating zero. As well as fixing this, I
2914 have increased the buffer size to 1024 (and made a note to document this).
2916 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2917 when Exim is waiting for an SMTP response from a remote server, Exim
2918 restarts its select() call on the socket, thereby resetting its timeout.
2919 This is not a problem when such interrupts are rare. Somebody set up a cron
2920 job to run exiwhat every 2 minutes, which is less than the normal select()
2921 timeout (5 or 10 minutes). This meant that the select() timeout never
2922 kicked in because it was always reset. I have fixed this by comparing the
2923 time when an interrupt arrives with the time at the start of the first call
2924 to select(). If more time than the timeout has elapsed, the interrupt is
2925 treated as a timeout.
2927 5. Some internal re-factoring in preparation for the addition of Sieve
2928 extensions (by MH). In particular, the "personal" test is moved to a
2929 separate function, and given an option for scanning Cc: and Bcc: (which is
2930 not set for Exim filters).
2932 6. When Exim created an email address using the login of the caller as the
2933 local part (e.g. when creating a From: or Sender: header line), it was not
2934 quoting the local part when it contained special characters such as @.
2936 7. Installed new OpenBSD configuration files.
2938 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2939 try to make them clearer.
2941 9. Callout options, other than the timeout value, were being ignored when
2942 verifying sender addresses in header lines. For example, when using
2944 verify = header_sender/callout=no_cache
2946 the cache was (incorrectly) being used.
2948 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2949 only the Cygwin environment.
2951 11. When return_path_on_delivery was set as a log selector, if different remote
2952 addresses in the same message used different return paths and parallel
2953 remote delivery occurred, the wrong values would sometimes be logged.
2954 (Whenever a remote delivery process finished, the return path value from
2955 the most recently started remote delivery process was logged.)
2957 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2958 lines when AUTH and/or TLS are in use. This is the "received protocol"
2959 field. Exim used to use "asmtp" for authenticated SMTP, without any
2960 indication (in the protocol name) for TLS use. Now it follows the RFC and
2961 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2962 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2963 names appear in log lines as well as in Received: header lines.
2965 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2966 extensions, and comparison tests, and to fix some bugs.
2968 14. Changes to the "personal" filter test:
2970 (1) The test was buggy in that it was just doing the equivalent of
2971 "contains" tests on header lines. For example, if a user's address was
2972 anne@some.where, the "personal" test would incorrectly be true for
2974 To: susanne@some.where
2976 This test is now done by extracting each address from the header in turn,
2977 and checking the entire address. Other tests that are part of "personal"
2978 are now done using regular expressions (for example, to check local parts
2979 of addresses in From: header lines).
2981 (2) The list of non-personal local parts in From: addresses has been
2982 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2983 taken from the Sieve specification recommendations.
2985 (3) If the message contains any header line starting with "List-" it is
2986 treated as non-personal.
2988 (4) The test for "circular" in the Subject: header line has been removed
2989 because it now seems ill-conceived.
2991 15. Minor typos in src/EDITME comments corrected.
2993 16. Installed latest exipick from John Jetmore.
2995 17. If headers_add on a router specified a text string that was too long for
2996 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2997 of string_sprintf() is now avoided.
2999 18. $message_body_size was not set (it was always zero) when running the DATA
3000 ACL and the local_scan() function.
3002 19. For the "mail" command in an Exim filter, no default was being set for
3003 the once_repeat time, causing a random time value to be used if "once" was
3004 specified. (If the value happened to be <= 0, no repeat happened.) The
3005 default is now 0s, meaning "never repeat". The "vacation" command was OK
3006 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3007 (I found it when inspecting the code).
3009 20. There is now an overall timeout for performing a callout verification. It
3010 defaults to 4 times the callout timeout, which applies to individual SMTP
3011 commands during the callout. The overall timeout applies when there is more
3012 than one host that can be tried. The timeout is checked before trying the
3013 next host. This prevents very long delays if there are a large number of
3014 hosts and all are timing out (e.g. when the network connections are timing
3015 out). The value of the overall timeout can be changed by specifying an
3016 additional sub-option for "callout", called "maxwait". For example:
3018 verify = sender/callout=5s,maxwait=20s
3020 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3021 to the end before writing, but this should make it even safer).
3023 22. Exim was forgetting that it had advertised PIPELINING for the second and
3024 subsequent messages on an SMTP connection. It was also not resetting its
3025 memory on STARTTLS and an internal HELO.
3027 23. When Exim logs an SMTP synchronization error within a session, it now
3028 records whether PIPELINING has been advertised or not.
3030 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3031 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3032 rather than long int.
3034 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3036 26. Added the never_mail option to autoreply.
3042 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3043 crash if the getsockname() call failed; this can happen if a connection is
3044 closed very soon after it is established. The problem was simply in the
3045 order in which certain operations were done, causing Exim to try to write
3046 to the SMTP stream before it had set up the file descriptor. The bug has
3047 been fixed by making things happen in the correct order.
3053 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3054 before the connection was closed, thus losing the rejection response.
3056 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3057 some early Solaris releases, but causes trouble in current releases where
3058 socklen_t is defined.
3060 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3063 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3066 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3067 that releasing the top of it at the end releases what was used for sub-
3068 expansions (unless the block got too big). However, discard this block if
3069 the first thing is a variable or header, so that we can use its block when
3070 it is dynamic (useful for very large $message_headers, for example).
3072 6. Lookups now cache *every* query, not just the most recent. A new, separate
3073 store pool is used for this. It can be recovered when all lookup caches are
3074 flushed. Lookups now release memory at the end of their result strings.
3075 This has involved some general refactoring of the lookup sources.
3077 7. Some code has been added to the store_xxx() functions to reduce the amount
3078 of flapping under certain conditions.
3080 8. log_incoming_interface used to affect only the <= reception log lines. Now
3081 it causes the local interface and port to be added to several more SMTP log
3082 lines, for example "SMTP connection from", and rejection lines.
3084 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3086 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3088 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3089 could be overwritten at the end of the current message (or the start of a
3090 new message if it was set in a HELO ACL). The value is now preserved for
3091 the duration of the SMTP connection.
3093 12. If a transport had a headers_rewrite setting, and a matching header line
3094 contained an unqualified address, that address was qualified, even if it
3095 did not match any rewriting rules. The underlying bug was that the values
3096 of the flags that permit the existence of unqualified sender and recipient
3097 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3098 non-local messages, and by -bnq for local messages) were not being
3099 preserved with the message after it was received.
3101 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3102 "next input=" as part of the text comprising the host identity instead of
3103 the correct text. The code was using the same buffer for two different
3104 strings. However, depending on which order the printing function evaluated
3105 its arguments, the bug did not always show up. Under Linux, for example, my
3106 test suite worked just fine.
3108 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3109 doesn't work with some older versions of Perl. It has been changed to "my",
3110 which in any case is probably the better facility to use.
3112 15. A really picky compiler found some instances of statements for creating
3113 error messages that either had too many or two few arguments for the format
3116 16. The size of the buffer for calls to the DNS resolver has been increased
3117 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3118 for addresses that have a lot of PTR records. This alleviates a problem; it
3119 does not fully solve it.
3121 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3122 buffer now truncates the list and logs the incident, which is the same
3123 action as happens when Exim is looking up a host name and its aliases.
3124 Previously in this situation something unpredictable would happen;
3125 sometimes it was "internal error: store_reset failed".
3127 18. If a server dropped the connection unexpectedly when an Exim client was
3128 using GnuTLS and trying to read a response, the client delivery process
3129 crashed while trying to generate an error log message.
3131 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3132 string, for example:
3134 warn message = H1: something\nH2: something
3136 the text was added as a single header line from Exim's point of view
3137 though it ended up OK in the delivered message. However, searching for the
3138 second and subsequent header lines using $h_h2: did not work. This has been
3139 fixed. Similarly, if a system filter added multiple headers in this way,
3140 the routers could not see them.
3142 20. Expanded the error message when iplsearch is called with an invalid key to
3143 suggest using net-iplsearch in a host list.
3145 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3146 ACLs are no longer actually imposed (and a message to that effect is
3149 22. If a "gecos" field in a passwd entry contained escaped characters, in
3150 particular, if it contained a \" sequence, Exim got it wrong when building
3151 a From: or a Sender: header from that name. A second bug also caused
3152 incorrect handling when an unquoted " was present following a character
3153 that needed quoting.
3155 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3156 was not being matched caselessly.
3158 24. Arranged for all hyphens in the exim.8 source to be escaped with
3161 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3162 properly. Recipient callout cache records were still being keyed to include
3163 the sender, even when use_sender was set false. This led to far more
3164 callouts that were necessary. The sender is no longer included in the key
3165 when use_sender is false.
3167 26. Added "control = submission" modifier to ACLs.
3169 27. Added the ${base62d: operator to decode base 62 numbers.
3171 28. dnsdb lookups can now access SRV records.
3173 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3174 the configuration file.
3176 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3177 (-v) mode. This makes the output for a verbose queue run more intelligible.
3179 31. Added a use_postmaster feature to recipient callouts.
3181 32. Added the $body_zerocount variable, containing the number of binary zero
3182 bytes in the message body.
3184 33. The time of last modification of the "new" subdirectory is now used as the
3185 "mailbox time last read" when there is a quota error for a maildir
3188 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3190 35. Added +ignore_unknown as a special item in host lists.
3192 36. Code for decoding IPv6 addresses in host lists is now included, even if
3193 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3194 address was recognized as an IP address, but was then not correctly decoded
3195 into binary, causing unexpected and incorrect effects when compared with
3202 1. Very minor rewording of debugging text in manualroute to say "list of
3203 hosts" instead of "hostlist".
3205 2. If verify=header_syntax was set, and a header line with an unqualified
3206 address (no domain) and a large number of spaces between the end of the
3207 name and the colon was received, the reception process suffered a buffer
3208 overflow, and (when I tested it) crashed. This was caused by some obsolete
3209 code that should have been removed. The fix is to remove it!
3211 3. When running in the test harness, delay a bit after writing a bounce
3212 message to get a bit more predictability in the log output.
3214 4. Added a call to search_tidyup() just before forking a reception process. In
3215 theory, someone could use a lookup in the expansion of smtp_accept_max_
3216 per_host which, without the tidyup, could leave open a database connection.
3218 5. Added the variables $recipient_data and $sender_data which get set from a
3219 lookup success in an ACL "recipients" or "senders" condition, or a router
3220 "senders" option, similar to $domain_data and $local_part_data.
3222 6. Moved the writing of debug_print from before to after the "senders" test
3225 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3226 problems for message scanning, either using a data ACL, or using
3227 local_scan() because the Received: header was not generated till after they
3228 were called (in order to set the time as the time of reception completion).
3229 I have revised the way this works. The header is now generated after the
3230 body is received, but before the ACL or local_scan() are called. After they
3231 are run, the timestamp in the header is updated.
3237 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3238 before starting a queue runner without re-exec. This happened only when
3239 deliver_drop_privilege was set or when the Exim user was set to root. The
3240 effect of the bug was that timeouts during subsequent deliveries caused
3241 crashes instead of being properly handled. The handler is now left at its
3242 default (and expected) setting.
3244 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3245 message, again when deliver_drop_privilege is set or Exim is run as root.
3246 The bug described in (1) was not present in this case, but the tidying up
3247 of the other signals was missing. I have made the two cases consistent.
3249 3. The ignore_target_hosts setting on a manualroute router was being ignored
3250 for hosts that were looked up using the /MX notation.
3252 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3255 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3256 operated on the sender address. After changing the $sender_address to <>
3257 for the sender address verify, Exim was re-instated it as the original
3258 (before rewriting) address, but remembering that it had rewritten it, so it
3259 wasn't rewriting it again. This bug also had the effect of breaking the
3260 sender address verification caching when the sender address was rewritten.
3262 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3263 This has been changed so that if the ip literal address matches
3264 ignore_target_hosts, the router declines.
3266 7. Added expansion conditions match_domain, match_address, and match_local_
3267 part (NOT match_host).
3269 8. The placeholder for the Received: header didn't have a length field set.
3271 9. Added code to Exim itself and to exim_lock to test for a specific race
3272 condition that could lead to file corruption when using MBX delivery. The
3273 issue is with the lockfile that is created in /tmp. If this file is removed
3274 after a process has opened it but before that process has acquired a lock,
3275 there is the potential for a second process to recreate the file and also
3276 acquire a lock. This could lead to two Exim processes writing to the file
3277 at the same time. The added code performs the same test as UW imapd; it
3278 checks after acquiring the lock that its file descriptor still refers to
3279 the same named file.
3281 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3282 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3285 11. Added the smtp_active_hostname option. If used, this will typically be made
3286 to depend on the incoming interface address. Because $interface_address is
3287 not set up until the daemon has forked a reception process, error responses
3288 that can happen earlier (such as "too many connections") no longer contain
3291 12. If an expansion in a condition on a "warn" statement fails because a lookup
3292 defers, the "warn" statement is abandoned, and the next ACL statement is
3293 processed. Previously this caused the whole ACL to be aborted.
3295 13. Added the iplsearch lookup type.
3297 14. Added ident_timeout as a log selector.
3299 15. Added tls_certificate_verified as a log selector.
3301 16. Added a global option tls_require_ciphers (compare the smtp transport
3302 option of the same name). This controls incoming TLS connections.
3304 17. I finally figured out how to make tls_require_ciphers do a similar thing
3305 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3306 before starting the TLS session.
3308 18. Tabs are now shown as \t in -bP output.
3310 19. If the log selector return_path_on_delivery was set, Exim crashed when
3311 bouncing a message because it had too many Received: header lines.
3313 20. If two routers both had headers_remove settings, and the first one included
3314 a superfluous trailing colon, the final name in the first list and the
3315 first name in the second list were incorrectly joined into one item (with a
3316 colon in the middle).
3322 1. Added -C and -D options to the exinext utility, mainly to make it easier
3323 to include in the automated testing, but these could be helpful when
3324 multiple configurations are in use.
3326 2. The exinext utility was not formatting the output nicely when there was
3327 an alternate port involved in the retry record key, nor when there was a
3328 message id as well (for retries that were specific to a specific message
3329 and a specific host). It was also confused by IPv6 addresses, because of
3330 the additional colons they contain. I have fixed the IPv4 problem, and
3331 patched it up to do a reasonable job for IPv6.
3333 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3334 delivery, the log line now contains "pipelined" if PIPELINING was used.
3336 4. An SMTP transport process used to panic and die if the bind() call to set
3337 an explicit outgoing interface failed. This has been changed; it is now
3338 treated in the same way as a connect() failure.
3340 5. A reference to $sender_host_name in the part of a conditional expansion
3341 that was being skipped was still causing a DNS lookup. This no longer
3344 6. The def: expansion condition was not recognizing references to header lines
3345 that used bh_ and bheader_.
3347 7. Added the _cache feature to named lists.
3349 8. The code for checking quota_filecount in the appendfile transport was
3350 allowing one more file than it should have been.
3352 9. For compatibility with Sendmail, the command line option
3360 and sets the incoming protocol and host name (for trusted callers). The
3361 host name and its colon can be omitted when only the protocol is to be set.
3362 Note the Exim already has two private options, -pd and -ps, that refer to
3363 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3364 "s", but I don't think that's a major issue.
3366 10. A number of refactoring changes to the code, none of which should affect
3369 (a) The number of logging options was getting close to filling up the
3370 32-bit word that was used as a bit map. I have split them into two classes:
3371 those that are passed in the argument to log_write(), and those that are
3372 only ever tested independently outside of that function. These are now in
3373 separate 32-bit words, so there is plenty of room for expansion again.
3374 There is no change in the user interface or the logging behaviour.
3376 (b) When building, for example, log lines, the code previously used a
3377 macro that called string_cat() twice, in order to add two strings. This is
3378 not really sufficiently general. Furthermore, there was one instance where
3379 it was actually wrong because one of the argument was used twice, and in
3380 one call a function was used. (As it happened, calling the function twice
3381 did not affect the overall behaviour.) The macro has been replaced by a
3382 function that can join an arbitrary number of extra strings onto a growing
3385 (c) The code for expansion conditions now uses a table and a binary chop
3386 instead of a serial search (which was left over from when there were very
3387 few conditions). Also, it now recognizes conditions like "pam" even when
3388 the relevant support is not compiled in: a suitably worded error message is
3389 given if an attempt is made to use such a condition.
3391 11. Added ${time_interval:xxxxx}.
3393 12. A bug was causing one of the ddress fields not to be passed back correctly
3394 from remote delivery subprocesses. The field in question was not being
3395 subsequently used, so this caused to problems in practice.
3397 13. Added new log selectors queue_time and deliver_time.
3399 14. Might have fixed a bug in maildirsizefile handling that threw up
3400 "unexpected character" debug warnings, and recalculated the data
3401 unnecessarily. In any case, I expanded the warning message to give more
3404 15. Added the message "Restricted characters in address" to the statements in
3405 the default ACL that block characters like @ and % in local parts.
3407 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3408 Three changes have been made:
3410 (a) There was a serious bug; a negative response to MAIL caused the whole
3411 recipient domain to be cached as invalid, thereby blocking all messages
3412 to all local parts at the same domain, from all senders. This bug has
3413 been fixed. The domain is no longer cached after a negative response to
3414 MAIL if the sender used is not empty.
3416 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3419 (c) A new callout option, "use_sender" has been added for people who want
3420 the modified behaviour.
3426 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3429 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3430 indeed breaks things for older releases.
3432 3. Added additional logging to the case where there is a problem reading data
3433 from a filter that is running in a subprocess using a pipe, in order to
3434 try to track down a specific problem.
3436 4. Testing facility fudge: when running in the test harness and attempting
3437 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3438 getting "No route to host". Convert this to a timeout.
3440 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3443 6. Some OS don't have socklen_t but use size_t instead. This affects the
3444 fifth argument of getsockopt() amongst other things. This is now
3445 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3446 can be set for individual OS. I have set it for SunOS5, OSF1, and
3447 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3448 some earlier ones do not.
3450 7. Change 4.30/15 was not doing the test caselessly.
3452 8. The standard form for an IPv6 address literal was being rejected by address
3453 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3454 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3455 this, as well as the form without the "IPv6" on the front (but only when
3456 address literals are enabled, of course).
3458 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3460 10. Exim crashed if a message with an empty sender address specified by -f
3461 encountered a router with an errors_to setting. This could be provoked only
3462 by a command such as
3466 where an empty string was supplied; "<>" did not hit this bug.
3468 11. Installed PCRE release 4.5.
3470 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3471 remained set. It is now erased.
3473 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3474 times from message ids (which are base 36 rather than the normal 62).
3476 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3477 were being counted as actual protocol errors, and logged if the log
3478 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3479 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3480 and DATA following a set of rejected RCPTs do not count as protocol errors.
3481 In other words, Exim assumes they were pipelined, though this may not
3482 actually be the case. Of course, in all cases the client gets an
3483 appropriate error code.
3485 15. If a lookup fails in an ACL condition, a message about the failure may
3486 be available; it is used if testing the ACL cannot continue, because most
3487 such messages specify what the cause of the deferral is. However, some
3488 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3489 that caused an old message to be retained and used if a later statement
3490 caused a defer, replacing the real cause of the deferral.
3492 16. If an IP address had so many PTR records that the DNS lookup buffer
3493 was not large enough to hold them, Exim could crash while trying to process
3494 the truncated data. It now detects and logs this case.
3496 17. Further to 4.21/58, another change has been made: if (and only if) the
3497 first line of a message (the first header line) ends with CRLF, a bare LF
3498 in a subsequent header line has a space inserted after it, so as not to
3499 terminate the header.
3501 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3502 unnecessarily, used atoi() instead of strtol(), and didn't check the
3503 termination when getting file sizes from file names by regex.
3505 19. Completely re-implemented the support for maildirsize files, in the light
3506 of a number of problems with the previous contributed implementation
3507 (4.30/29). In particular:
3509 . If the quota is zero, the maildirsize file is maintained, but no quota is
3512 . If the maildir directory does not exist, it is created before any attempt
3513 to write a maildirsize file.
3515 . The quota value in the file is just a cache; if the quota is changed in
3516 the transport, the new value overrides.
3518 . A regular expression is available for excluding directories from the
3521 20. The autoreply transport checks the characters in options that define the
3522 message's headers; it allows continued headers, but it was checking with
3523 isspace() after an embedded newline instead of explicitly looking for a
3526 21. If all the "regular" hosts to which an address was routed had passed their
3527 expiry times, and had not reached their retry times, the address was
3528 bounced, even if fallback hosts were defined. Now Exim should go on to try
3531 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3532 equivalent code in the SMTP transport. Some hosts send humungous responses
3533 to HELO/EHLO, more than 1024 it seems.
3535 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3536 gives compiler warnings in some environments. I've now done it "properly",
3539 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3540 (because of problems with the built-in one) was declared to return uschar *
3541 instead of char *, causing compiler failure.
3543 25. Fixed a file descriptor leak when processing alias/forward files.
3545 26. Fixed a minor format string issue in dbfn.c.
3547 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3549 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3550 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3553 29. When a sender address is verified, it is cached, to save repeating the test
3554 when there is more than one recipient in a message. However, when the
3555 verification involves a callout, it is possible for different callout
3556 options to be set for different recipients. It is too complicated to keep
3557 track of this in the cache, so now Exim always runs a verification when a
3558 callout is required, relying on the callout cache for the optimization.
3559 The overhead is duplication of the address routing, but this should not be
3562 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3563 to be verified with callout=postmaster, and the main callout worked but the
3564 postmaster check failed, the verification correctly failed. However, if a
3565 subsequent RCPT command asked for sender verification *without* the
3566 postmaster check, incorrect caching caused this verification also to fail,
3569 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3570 it was not caching the DNS options (qualify_single, search_parents) that
3571 were used when the lookup failed. A subsequent lookup with different
3572 options therefore always gave the same answer, though there were cases
3573 where it should not have. (Example: a "domains = !$mx_any" option on a
3574 dnslookup router: the "domains" option is always processed without any
3575 widening, but the router might have qualify_single set.) Now Exim uses the
3576 cached value only when the same options are set.
3578 32. Added John Jetmore's "exipick" utility to the distribution.
3580 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3581 than a timeout (e.g. a certificate is required, and is not provided), an
3582 Exim server now closes the connection immediately. Previously it waited for
3583 the client to close - but if the client is SSL, it seems that they each
3584 wait for each other, leading to a delay before one of them times out.
3586 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3587 maintained 0.8.x compatibility because I don't think many are using it, and
3588 it is clearly obsolete.
3590 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3593 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3594 client certificate was expired. A simple patch fixes this, though I don't
3595 understand the full logic of why the verify callback is called multiple
3598 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3599 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3600 which causes problems with some clients (such as the Certicom SSL Plus
3601 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3602 disables the coutermeasure allowing Eudora to connect."
3604 38. Exim was not checking that a write() to a log file succeeded. This could
3605 lead to Bad Things if a log got too big, in particular if it hit a file
3606 size limit. Exim now panics and dies if it cannot write to a log file, just
3607 as it does if it cannot open a log file.
3609 39. Modified OS/Makefile-Linux so that it now contains
3611 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3613 The two -D definitions ensure that Exim is compiled with large file
3614 support, which makes it possible to handle log files that are bigger than
3617 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3618 instance) a domain was checked against a named list that involved a lookup,
3619 causing $domain_data to be set, then another domain was checked against the
3620 same list, then the first domain was re-checked, the value of $domain_data
3621 after the final check could be wrong. In particular, if the second check
3622 failed, it could be set empty. This bug probably also applied to
3625 41. The strip_trailing_dot option was not being applied to the address given
3626 with the -f command-line option.
3628 42. The code for reading a message's header from the spool was incrementing
3629 $received_count, but never initializing it. This meant that the value was
3630 incorrect (doubled) while delivering a message in the same process in which
3631 it was received. In the most common configuration of Exim, this never
3632 happens - a fresh exec is done - but it can happen when
3633 deliver_drop_privilege is set.
3635 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3636 it now includes up to 150 characters of the unexpected data in the log
3639 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3640 and building data strings. The size of both of these buffers was 10 000
3641 bytes - far larger than anybody would *ever* want, thought I. Needless to
3642 say, somebody hit the limit. I have increased the maximum line length to
3643 20 000 and the maximum data length of concatenated lines to 100 000. I have
3644 also fixed two bugs, because there was no checking on these buffers. Tsk,
3645 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3646 buffer is too small.
3648 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3649 lsearch lookups. Now it does.
3651 46. When parsing a route_list item in a manualroute router, a fixed-length
3652 buffer was used for the list of hosts. I made this 1024 bytes long,
3653 thinking that nobody would ever have a list of hosts that long. Wrong.
3654 Somebody had a whole pile of complicated expansion conditions, and the
3655 string was silently truncated, leading to an expansion error. It turns out
3656 that it is easier to change to an unlimited length (owing to other changes
3657 that have happened since this code was originally written) than to build
3658 structure for giving a limitation error. The length of the item that
3659 expands into the list of hosts is now unlimited.
3661 47. The lsearch lookup could not handle data where the length of text line was
3662 more than 4095 characters. Such lines were truncated, leading to shortened
3663 data being returned. It should now handle lines of any length.
3665 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3666 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3669 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3670 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3671 no longer happens in comment lines. A list of replacements is now placed
3672 at the head of all of the source files, except those whose only change is
3673 to replace PERL_COMMAND in the very first #! line.
3675 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3676 messages on the queue, with a bottom-up merge sort, using code contributed
3677 by Michael Haardt. This should make operations like -bp somewhat faster on
3678 large queues. It won't affect queue runners, except when queue_run_in_order
3681 51. Installed eximstats 1.31 in the distribution.
3683 52. Added support for SRV lookups to the dnslookup router.
3685 53. If an ACL referred to $message_body or $message_body_end, the value was not
3686 reset for any messages that followed in the same SMTP session.
3688 54. The store-handling optimization for building very long strings was not
3689 differentiating between the different store pools. I don't think this
3690 actually made any difference in practice, but I've tidied it.
3692 55. While running the routers to verify a sender address, $sender_address
3693 was still set to the sender address. This is wrong, because when routing to
3694 send a bounce to the sender, it would be empty. Therefore, I have changed
3695 it so that, while verifying a sender address, $sender_address is set to <>.
3696 (There is no change to what happens when verifying a recipient address.)
3698 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3699 target A or AAAA records (if not already returned) without resetting the
3700 qualify_single or search_parents options of the DNS resolver. These are
3701 inappropriate in this case because the targets of MX and SRV records must
3702 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3703 target that, when qualified, matched something in the local domain. These
3704 two options are now turned off when doing these lookups.
3706 57. It seems that at least some releases of Reiserfs (which does not have the
3707 concept of a fixed number of inodes) returns zero and not -1 for the
3708 number of available inodes. This interacted badly with check_spool_inodes,
3709 which assumed that -1 was the "no such thing" setting. What I have done is
3710 to check that the total number of inodes is greater than zero before doing
3711 the test of how many are available.
3713 58. When a "warn" ACL statement has a log_message modifier, the message is
3714 remembered, and not repeated. This is to avoid a lot of repetition when a
3715 message has many recipients that cause the same warning to be written.
3716 Howewer, Exim was preserving the list of already written lines for an
3717 entire SMTP session, which doesn't seem right. The memory is now reset if a
3718 new message is started.
3720 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3721 debugging output unless log_rewrite was also set.
3723 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3724 of (int)(handle) when we know that handle contains (void *)(-1).
3726 61. The Exim daemon panic-logs an error return when it closes the incoming
3727 connection. However "connection reset by peer" seems to be common, and
3728 isn't really an error worthy of noting specially, so that particular error
3731 62. When Exim is trying to find all the local interfaces, it used to panic and
3732 die if the ioctl to get the interface flags failed. However, it seems that
3733 on at least one OS (Solaris 9) it is possible to have an interface that is
3734 included in the list of interfaces, but for which you get a failure error
3735 for this call. This happens when the interface is not "plumbed" into a
3736 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3737 failure of the "get flags" call assumes that the interface is down.
3739 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3740 makes life easier for people who are doing arithmetic on fields extracted
3741 from dates, where you often get leading zeros that should not be
3742 interpreted as octal.
3744 64. Added qualify_domain to the redirect router, to override the global
3747 65. If a pathologically long header line contained very many addresses (the
3748 report of this problem mentioned 10 000) and each of them was rewritten,
3749 Exim could use up a very large amount of memory. (It kept on making new
3750 copies of the header line as it rewrote, and never released the old ones.)
3751 At the expense of a bit more processing, the header rewriting function has
3752 been changed so that it no longer eats memory in this way.
3754 66. The generation of the Received: header has been moved from the time that a
3755 message starts to be received, to the time that it finishes. The timestamp
3756 in the Received: header should now be very close to that of the <= log
3757 line. There are two side-effects of this change:
3759 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3760 logged header lines no longer include the local Received: line, because
3761 it has not yet been created. The same applies to a copy of the message
3762 that is returned to a non-SMTP sender when a message is rejected.
3764 (b) When a filter file is tested using -bf, no additional Received: header
3765 is added to the test message. After some thought, I decided that this
3768 This change does not affect the value of $received_for. It is still set
3769 after address rewriting, but before local_scan() is called.
3771 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3773 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3774 gave an unhelpful panic error message, and a defer error. I have managed to
3775 change this behaviour so that it now rejects any supplied certificate,
3776 which seems right, as the list of acceptable certificates is empty.
3778 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3779 gave an unhelpful defer error. I have not managed to make this reject any
3780 supplied certificates, but the error message it gives is "no certificate
3781 supplied", which is not helpful.
3783 70. exigrep's output now also includes lines that are not associated with any
3784 message, but which match the given pattern. Implemented by a patch from
3785 Martin Sluka, which also tidied up the Perl a bit.
3787 71. Recipient callout verification, like sender verification, was using <> in
3788 the MAIL FROM command. This isn't really the right thing, since the actual
3789 sender may affect whether the remote host accepts the recipient or not. I
3790 have changed it to use the actual sender in the callout; this means that
3791 the cache record is now keyed on a recipient/sender pair, not just the
3792 recipient address. There doesn't seem to be a real danger of callout loops,
3793 since a callout by the remote host to check the sender would use <>.
3794 [SEE ABOVE: changed after hitting problems.]
3796 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3797 temporary errors. However, in the case of such a code being given after
3798 the end of a data transmission (i.e. after ".") Exim was failing to write
3799 a retry record for the message. (Yes, there was some broken host that was
3800 actually sending 8xx at this point.)
3802 73. An unknown lookup type in a host list could cause Exim to panic-die when
3803 the list was checked. (An example that provoked this was putting <; in the
3804 middle of a list instead of at the start.) If this happened during a DATA
3805 ACL check, a -D file could be left lying around. This kind of configuration
3806 error no longer causes Exim to die; instead it causes a defer errror. The
3807 incident is still logged to the main and panic logs.
3809 74. Buglet left over from Exim 3 conversion. The message "too many messages
3810 in one connection" was written to the rejectlog but not the mainlog, except
3811 when address rewriting (yes!) was being logged.
3813 75. Added write_rejectlog option.
3815 76. When a system filter was run not as root (that is, when system_filter_user
3816 was set), the values of the $n variables were not being returned to the
3817 main process; thus, they were not subsequently available in the $sn
3820 77. Added +return_path_on_delivery log selector.
3822 78. A connection timeout was being treated differently from recipients deferred
3823 when testing hosts_max_try with a message that was older than the host's
3824 retry timeout. (The host should not be counted, thus allowing all hosts to
3825 be tried at least once before bouncing.) This may have been the cause of an
3826 occasionally reported bug whereby a message would remain on the queue
3827 longer than the retry timeout, but would be bounced if a delivery was
3828 forced. I say "may" because I never totally pinned down the problem;
3829 setting up timeout/retry tests is difficult. See also the next item.
3831 79. The ultimate address timeout was not being applied to errors that involved
3832 a combination of host plus message (for example, a timeout on a MAIL
3833 command). When an address resolved to a number of possible hosts, and they
3834 were not all tried for each delivery (e.g. because of hosts_max_try), a
3835 message could remain on the queue longer than the retry timeout.
3837 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3840 81. Fixed an obscure SMTP outgoing bug which required at least the following
3841 conditions: (a) there was another message waiting for the same server;
3842 (b) the server returned 5xx to all RCPT commands in the first message so
3843 that the message was not completed; (c) the server dropped the connection
3844 or gave a negative response to the RSET that Exim sends to abort the
3845 transaction. The observed case was a dropped connection after DATA that had
3846 been sent in pipelining mode. That is, the server had advertised PIPELINING
3847 but was not implementing it correctly. The effect of the bug was incorrect
3848 behaviour, such as trying another host, and this could lead to a crash.
3854 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3855 and daemon.c were passed as pointers to ints; they should have been
3856 pointers to socklen_t variables (which are typically unsigned ints).
3858 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3861 3. Fixed a really odd bug that affected only the testing scheme; patching a
3862 certain fixed string in the binary changed the value of another string that
3863 happened to be identical to the end of the original first string.
3865 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3866 name", it returns that address as the IP address. On some operating
3867 systems (e.g. Solaris), it also passes back the IP address string as the
3868 "host name". However, on others (e.g. Linux), it passes back an empty
3869 string. Exim wasn't checking for this, and was changing the host name to an
3870 empty string, assuming it had been canonicized.
3872 5. Although rare, it is permitted to have more than one PTR record for a given
3873 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3874 all the names associated with an address, because they do in Solaris.
3875 However, it seems that they do not in Linux for data that comes from the
3876 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3877 I found this out when I moved to a new Linux workstation and tried to run
3878 the Exim test suite.
3880 To get round this problem I have changed the code so that it now does its
3881 own call to the DNS to look up PTR records when searching for a host name.
3882 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3883 addresses that are only in /etc/hosts are still found.
3885 This behaviour is, however, controlled by an option called host_lookup_
3886 order, which defaults to "bydns:byaddr". If people want to use the other
3887 order, or indeed, just use one or the other means of lookup, they can
3888 specify it in this variable.
3890 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3891 some operating systems, this comes back from gethostbyaddr() as an empty
3892 string, and this is what Exim used to test for. However, it seems that in
3893 other systems, "." is yielded. Exim now tests for this case too.
3895 7. The values of check_spool_space and check_log_space are now held internally
3896 as a number of kilobytes instead of an absolute number of bytes. If a
3897 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3898 kilobyte. This means that much larger values can be stored.
3900 8. Exim monitor: an attempt to get the action menu when not actually pointing
3901 at a message produces an empty menu entitled "No message selected". This
3902 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3903 no entries in it ("Shell widget menu has zero width and/or height"). So I
3904 have added a single, blank menu entry in this case.
3906 9. Added ${quote_local_part.
3908 10. MIME decoding is now applied to the contents of Subject: header lines when
3911 11. Now that a reference to $sender_host_address automatically causes a reverse
3912 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3913 host lookup before query-style lookups in lists that might use this
3914 variable. This has therefore been abolished, and the "net-" prefix is no
3915 longer necessary for query-style lookups.
3917 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3918 have been a typo for LFLAGS, so it has been changed.
3920 13. The install script calls Exim with "-C /dev/null" in order to find the
3921 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3922 to be output. Howeve, since Exim outputs its version number before the
3923 error, it didn't break the script. It just looked ugly. I fixed this by
3924 always allowing "-C /dev/null" if the caller is root.
3926 14. Ignore overlarge ACL variable number when reading spool file - insurance
3927 against a later release with more variables having written the file.
3929 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3930 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3931 this, as well as the form without the "IPv6" on the front.
3933 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3934 OS/Makefile-Darwin file.
3936 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3937 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3939 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3940 variable. However, some OS use ints for inodes. I've added cast to long int
3941 to get rid of the compiler warning.
3943 19. I had forgotten to lock out "/../" in configuration file names when
3944 ALT_CONFIG_PREFIX was set.
3946 20. Routers used for verification do not need to specify transports. However,
3947 if such a router generated a host list, and callout was configured, Exim
3948 crashed, because it could not find a port number from the (non-existent)
3949 transport. It now assumes port 25 in this circumstance.
3951 21. Added the -t option to exigrep.
3953 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3954 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3955 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3956 them is set, LOOKUP_LSEARCH is forced.
3958 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3960 24. Added sender and host information to the "rejected by local_scan()" log
3961 line; previously there was no indication of these.
3963 25. Added .include_if_exists.
3965 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3966 Linux. It turns out that not all file systems support this. Apparently some
3967 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3968 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3969 not supported on the file descriptor, is now ignored when Exim is trying to
3970 sync a directory. This applies only to Linux.
3972 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3974 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3975 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3978 29. Added support for maildirsize files from supplied patch (modified a bit).
3980 30. The use of :fail: followed by an empty string could lead Exim to respond to
3981 sender verification failures with (e.g.):
3983 550 Verification failed for <xxx>
3984 550 Sender verify failed
3986 where the first response line was missing the '-' that indicates it is not
3987 the final line of the response.
3989 31. The loop for finding the name of the user that called Exim had a hardwired
3990 limit of 10; it now uses the value of finduser_retries, which is used for
3991 all other user lookups.
3993 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3996 33. Exim was neglecting to zero errno before one call of strtol() when
3997 expanding a string and expecting an integer value. On some systems this
3998 resulted in spurious "integer overflow" errors. Also, it was casting the
3999 result into an int without checking.
4001 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4002 did not work. The code looks as if it has *never* worked, though it appears
4003 to have been documented since at least releast 1.62. I have made it work.
4005 35. The "timeout_DNS" error in retry rules, also documented since at least
4006 1.62, also never worked. As it isn't clear exactly what this means, and
4007 clearly it isn't a major issue, I have abolished the feature by treating it
4008 as "timeout", and writing a warning to the main and panic logs.
4010 36. The display of retry rules for -brt wasn't always showing the error code
4013 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4014 timeout_connect_A, timeout_connect_MX.
4016 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4017 to the empty sender.
4019 39. The daemon was not analysing the content of -oX till after it had closed
4020 stderr and disconnected from the controlling terminal. This meant that any
4021 syntax errors were only noted on the panic log, and the return code from
4022 the command was 0. By re-arranging the code a little, I've made the
4023 decoding happen first, so such errors now appear on stderr, and the return
4024 code is 1. However, the actual setting up of the sockets still happens in
4025 the disconnected process, so errors there are still only recorded on the
4028 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4029 connections (as happens on some IP stacks) was logged at start up time as
4030 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4031 it from "IPv6 and IPv4", which means that two separate sockets are being
4034 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4035 says whether AF_INET or AF_INET6 was passed as an argument.
4037 42. Exiwhat output was messed up when time zones were included in log
4040 43. Exiwhat now gives more information about the daemon's listening ports,
4041 and whether -tls-on-connect was used.
4043 44. The "port" option of the smtp transport is now expanded.
4045 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4046 silently ignored. Now an error message is written to the main and panic
4049 46. There's a new ACL modifier called "logwrite" which writes to a log file
4050 as soon as it is encountered.
4052 47. Added $local_user_uid and $local_user_gid at routing time.
4054 48. Exim crashed when trying to verify a sender address that was being
4057 49. Exim was recognizing only a space character after ".include". It now also
4058 recognizes a tab character.
4060 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4061 extracting the relevant information from the specification. The man page no
4062 longer contains scrambled data for the -d option, and I've added a section
4063 at the front about calling Exim under different names.
4065 51. Added "extra_headers" argument to the "mail" command in filter files.
4067 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4070 53. Installed eximstats 1.29.
4072 54. Added transport_filter_timeout as a generic transport option.
4074 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4075 Cc: header lines. This was required by RFC 822, but it not required by RFC
4078 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4079 incoming messages that did not have them. Now it does so only if the
4080 message originates locally, that is, if there is no associated remote host
4081 address. When Resent- header lines are present, this applies to the Resent-
4082 lines rather than the non-Resent- lines.
4084 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4085 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4087 58. Messages for configuration errors now include the name of the main
4088 configuration file - useful now that there may be more than one file in a
4089 list (.included file names were always shown).
4091 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4092 for those rare installations that do not start the daemon as root or run it
4093 setuid root. I've cut out the call to initgroups() if the daemon is not
4096 60. The Exim user and group can now be bound into the binary as text strings
4097 that are looked up at the start of Exim's processing.
4099 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4101 62. Added $mailstore_basename variable.
4103 63. Installed patch to sieve.c from Michael Haardt.
4105 64. When Exim failed to open the panic log after failing to open the main log,
4106 the original message it was trying to log was written to stderr and debug
4107 output, but if they were not available (the usual case in production), it
4108 was lost. Now it is written to syslog before the two lines that record the
4109 failures to open the logs.
4111 65. Users' Exim filters run in subprocesses under the user's uid. It is
4112 possible for a "deliver" command or an alias in a "personal" command to
4113 provoke an address rewrite. If logging of address rewriting is configured,
4114 this fails because the process is not running as root or exim. There may be
4115 a better way of dealing with this, but for the moment (because 4.30 needs
4116 to be released), I have disabled address rewrite logging when running a
4117 filter in a non-root, non-exim process.
4123 1. The buildconfig auxiliary program wasn't quoting the value set for
4124 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4125 not defined. This bug was masked in 4.22 by the effect that was fixed in
4128 2. Some messages that were rejected after a message id was allocated were
4129 shown as "incomplete" by exigrep. It no longer does this for messages that
4130 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4132 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4133 have allow_domain_literals set, the ID did not get logged in the <= line.
4134 Domain literals are now always recognized in Message-ID: header lines.
4136 4. The first argument for a ${extract expansion item is the key name or field
4137 number. Leading and trailing spaces in this item were not being ignored,
4138 causing some misleading effects.
4140 5. When deliver_drop_privilege was set, single queue runner processes started
4141 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4142 same command in the process it spins off) were not dropping privilege.
4144 6. When the daemon running as "exim" started a queue runner, it always
4145 re-executed Exim in the spun-off process. This is a waste of effort when
4146 deliver_drop_privilege is set. The new process now just calls the
4147 queue-runner function directly.
4153 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4156 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4157 ignored. Though the use of -oP was forcing the writing of a pid file, it
4158 was always written to the default place.
4160 3. If the message "no IP address found for host xxxx" is generated during
4161 incoming verification, it is now followed by identification of the incoming
4162 connection (so you can more easily find what provoked it).
4164 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4166 5. Added some features to "harden" Exim a bit more against certain attacks:
4168 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4169 be put in Local/Makefile. This is like the never_users runtime option,
4170 but it cannot be overridden. The default setting is "root".
4172 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4173 prefix string with which any file named in a -C command line option
4176 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4177 is retained for -C and -D only if the caller of Exim is root. Without
4178 it, the exim user may also use -C and -D and retain privilege.
4180 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4181 command line option is disabled.
4183 6. Macro names set by the -D option must start with an upper case letter, just
4184 like macro names defined in the configuration file.
4186 7. Added "dereference=" facility to LDAP.
4188 8. Two instances of the typo "uknown" in the source files are fixed.
4190 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4191 the Configure-Makefile script screwed up while processing it.
4193 10. Incorporated PCRE 4.4.
4195 11. The SMTP synchronization check was not operating right at the start of an
4196 SMTP session. For example, it could not catch a HELO sent before the client
4197 waited for the greeting. There is now a check for outstanding input at the
4198 point when the greeting is written. Because of the duplex, asynchronous
4199 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4200 way, but not yet received, when the check is performed.
4202 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4203 on TCP/IP sockets, because this apparently causes some broken clients to
4206 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4207 unchanged) from the Cygwin maintainer.
4209 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4210 was supported instead of testing for mbx. Effectively a typo.
4212 15. The spa authenticator server code was not checking that the input it
4213 received was valid base64.
4215 16. The debug output line for the "set" modifier in ACLs was not showing the
4216 name of the variable that was being set.
4218 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4220 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4221 lookup on its own. Something else was needed to trigger the lookup. For
4222 example, a match in host_lookup or the need for a host name in a host list.
4223 Now, if $sender_host_name is referenced and the host name has not yet been
4224 looked up, a lookup is performed. If the lookup fails, the variable remains
4225 empty, and $host_lookup_failed is set to "1".
4227 19. Added "eqi" as a case-independent comparison operator.
4229 20. The saslauthd authentication condition could segfault if neither service
4230 nor realm was specified.
4232 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4233 error message that was logged was misleading, and incoming SMTP
4234 connections were dropped. The message is now more accurate, and temporary
4235 errors are given to SMTP connections.
4237 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4238 (except RSET) with a 421 error, until QUIT is received. However, it was
4239 failing to send a response to QUIT.
4241 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4242 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4243 ACL is now run after the helo_try_verify_hosts code.
4245 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4246 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4247 case-independent, so other case variants are also recognized). Apparently
4248 some systems use these upper case variants.
4250 25. If more than two messages were waiting for the same host, and a transport
4251 filter was specified for the transport, Exim sent two messages over the
4252 same TCP/IP connection, and then failed with "socket operation on non-
4253 socket" when it tried to send the third.
4255 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4257 27. The extern definition of crypt16() in expand.c was not being excluded when
4258 the OS had its own crypt16() function.
4260 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4261 as a preferred synonym for return_size_limit, both as an option and as an
4264 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4266 30. Changed the default configuration ACL to relax the local part checking rule
4267 for addresses that are not in any local domains. For these addresses,
4268 slashes and pipe symbols are allowed within local parts, but the sequence
4269 /../ is explicitly forbidden.
4271 31. SPA server authentication was not clearing the challenge buffer before
4274 32. log_message in a "warn" ACL statement was writing to the reject log as
4275 well as to the main log, which contradicts the documentation and doesn't
4276 seem right (because no rejection is happening). So I have stopped it.
4278 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4279 However, I am unable to do any testing of this.
4281 34. Fixed an infelicity in the appendfile transport. When checking directories
4282 for a mailbox, to see if any needed to be created, it was accidentally
4283 using path names with one or more superfluous leading slashes; tracing
4284 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4286 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4287 contents are added to the log line that is written for every discarded
4288 recipient. (Previously a log_message setting was ignored.)
4290 36. The ${quote: operator now quotes the string if it is empty.
4292 37. The install script runs exim in order to find its version number. If for
4293 some reason other than non-existence or emptiness, which it checks, it
4294 could not run './exim', it was installing it with an empty version number,
4295 i.e. as "exim-". This error state is now caught, and the installation is
4298 38. An argument was missing from the function that creates an error message
4299 when Exim fails to connect to the socket for saslauthd authentication.
4300 This could cause Exim to crash, or give a corrupted message.
4302 39. Added isip, isip4, and isip6 to ${if conditions.
4304 40. The ACL variables $acl_xx are now saved with the message, and can be
4305 accessed later in routers, transports, and filters.
4307 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4308 strings in the file are not string-expanded.
4310 42. If a MAIL command specified a SIZE value that was too large to fit into an
4311 int variable, the check against message_size_limit failed. Such values are
4312 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4313 day this will have to be increased, but I don't think I want to be around
4314 when emails are that large.
4321 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4322 iconv() is not standard in FreeBSD.
4324 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4325 IPv6 enabled. The observed symptom was a segmentation fault on return from
4326 the function os_common_find_running_interfaces() in src/os.c.
4328 3. In the check_special_case() function in daemon.c I had used "errno" as an
4329 argument name, which causes warnings on some systems. This was basically a
4330 typo, since it was named "eno" in the comments!
4332 4. The code that waits for the clock to tick (at a resolution of some fraction
4333 of a second) so as to ensure message-id uniqueness was always waiting for
4334 at least one whole tick, when it could have waited for less. [This is
4335 almost certainly not relevant at current processor speeds, where it is
4336 unlikely to ever wait at all. But we try to future-proof.]
4338 5. The function that sleeps for a time interval that includes fractions of a
4339 second contained a race. It did not block SIGALRM between setting the
4340 timer, and suspending (a couple of lines later). If the interval was short
4341 and the sigsuspend() was delayed until after it had expired, the suspension
4342 never ended. On busy systems this could lead to processes getting stuck for
4345 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4346 process, before it forks any delivery processes. The open lookup caching
4347 mechanism meant that the open file or database connection was passed into
4348 the delivery process. The problem was that delivery processes always tidy
4349 up cached lookup data. This could cause a problem for the next delivery
4350 process started by the queue runner, because the external queue runner
4351 process does not know about the closure. So the next delivery process
4352 still has data in the lookup cache. In the case of a file lookup, there was
4353 no problem because closing a file descriptor in a subprocess doesn't affect
4354 the parent. However, if the lookup was caching a connection to a database,
4355 the connection was closed, and the second delivery process was likely to
4356 see errors such as "PGSQL: query failed: server closed the connection
4357 unexpectedly". The problem has been fixed by closing all cached lookups
4358 in a queue runner before running a delivery process.
4360 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4361 seem to have the "const" qualifier which it has on other OS. I've
4364 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4365 *of the same type* (client or server) with the same public name that an
4366 error should be diagnosed.
4368 9. When Exim looked up a host name for an IP address, but failed to find the
4369 original IP address when looking up the host name (a safety check), it
4370 output the message "<ip address> does not match any IP for NULL", which was
4371 confusing, to say the least. The bug was that the host name should have
4372 appeared instead of "NULL".
4374 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4375 user that is built into the binary, and the -C or -D options is used, root
4376 privilege is dropped before the configuration file is read. In addition,
4377 logging is switched to stderr instead of the normal log files. If the
4378 configuration then re-defines the Exim user, the unprivileged environment
4379 is probably not what is expected, so Exim logs a panic warning message (but
4382 However, if deliver_drop_privilege is set, the unprivileged state may well
4383 be exactly what is intended, so the warning has been cut out in that case,
4384 and Exim is allowed to try to write to its normal log files.
4390 1. smtp_return_error_details was not giving details for temporary sender
4391 or receiver verification errors.
4393 2. Diagnose a configuration error if two authenticators have the same public
4396 3. Exim used not to create the message log file for a message until the first
4397 delivery attempt. This could be confusing when incoming messages were held
4398 for policy or load reasons. The message log file is now created at the time
4399 the message is received, and an initial "Received" line is written to it.
4401 4. The automatically generated man page for command line options had a minor
4402 bug that caused no ill effects; however, a more serious problem was that
4403 the procedure for building the man page automatically didn't always
4404 operate. Consequently, release 4.20 contains an out-of-date version. This
4405 shouldn't happen again.
4407 5. When building Exim with embedded Perl support, the script that builds the
4408 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4409 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4411 6. The freeze_tell option was not being used for messages that were frozen on
4412 arrival, either by an ACL or by local_scan().
4414 7. Added the smtp_incomplete_transaction log selector.
4416 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4417 was accepting AUTH without a new EHLO.
4419 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4420 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4423 10. Logging of TCP/IP connections (when configured) now happens in the main
4424 daemon process instead of the child process, so that the TCP/IP connection
4425 count is more accurate (but it can never be perfect).
4427 11. The use of "drop" in a nested ACL was not being handled correctly in the
4428 outer ACL. Now, if condition failure induced by the nested "drop" causes
4429 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4430 or "require"), the connection is dropped.
4432 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4433 that yield "discard" can now be used with an "accept" or a "discard" verb,
4434 but an error is generated for any others (because I can't see a useful way
4435 to define what should happen).
4437 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4438 are now processed in the same way as lines in the Exim configuration file.
4439 In particular, continuation lines are supported.
4441 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4443 15. Added -ti meaning -t -i.
4445 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4446 domains, and warn by logging if others are found.
4448 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4449 returned from GIFCONF when Exim is trying to find the list of interfaces on
4450 a host. The code in os.c has been modified to copy each ifreq to an aligned
4451 structure in all cases.
4453 Also, in some cases, the returned ifreq's were being copied to a 'struct
4454 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4455 means the last couple of bytes of an IPv6 address could be chopped if the
4456 ifreq contained only a normal sockaddr (14 bytes storage).
4458 18. Named domain lists were not supported in the hosts_treat_as_local option.
4459 An entry such as +xxxx was not recognized, and was treated as a literal
4462 19. Ensure that header lines added by a DATA ACL are included in the reject log
4463 if the ACL subsequently rejects the message.
4465 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4466 MD5 (which is deprecated).
4468 21. When testing a filter file using -bf, Exim was writing a message when it
4469 took the sender from a "From " line in the message, but it was not doing so
4470 when it took $return_path from a Return-Path: header line. It now does.
4472 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4473 with a valid header line field name (a series of printing characters
4474 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4476 23. Changed "disc" in the source to "disk" to conform to the documentation and
4477 the book and for uniformity.
4479 24. Ignore Sendmail's -Ooption=value command line item.
4481 25. When execve() failed while trying to run a command in a pipe transport,
4482 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4483 could be confused with a return value of 69 from the command itself. This
4484 has been changed to 127, the value the shell returns if it is asked to run
4485 a non-existent command. The wording for the related log line suggests a
4486 non-existent command as the problem.
4488 26. If received_header_text expands to an empty string, do not add a Received:
4489 header line to the message. (Well, it adds a token one on the spool, but
4490 marks it "old" so that it doesn't get used or transmitted.)
4492 27. Installed eximstats 1.28 (addition of -nt option).
4494 28. There was no check for failure on the call to getsockname() in the daemon
4495 code. This can fail if there is a shortage of resources on the system, with
4496 ENOMEM, for example. A temporary error is now given on failure.
4498 29. Contrary to the C standard, it seems that in some environments, the
4499 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4500 program. Exim now does this explicitly; it affects the formatting of
4501 timestamps using strftime().
4503 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4504 complaints. I've now initialized all the variables, to avoid this.
4506 32. Header lines added by a system filter were not being "seen" during
4507 transport-time rewrites.
4509 33. The info_callback() function passed to OpenSSL is set up with type void
4510 (*)(SSL *, int, int), as described somewhere. However, when calling the
4511 function (actually a macro) that sets it up, the type void(*)() is
4512 expected. I've put in a cast to prevent warnings from picky compilers.
4514 34. If a DNS black list lookup found a CNAME record, but there were no A
4515 records associated with the domain it pointed at, Exim crashed.
4517 35. If a DNS black list lookup returned more than one A record, Exim ignored
4518 all but the first. It now scans all returned addresses if a particular IP
4519 value is being sought. In this situation, the contents of the
4520 $dnslist_value variable are a list of all the addresses, separated by a
4523 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4524 to accept a host name and all its aliases if the forward lookup for any of
4525 them yielded the IP address of the incoming connection. Now it accepts only
4526 those names whose forward lookup yields the correct IP address. Any other
4527 names are discarded. This closes a loophole whereby a rogue DNS
4528 administrator could create reverse DNS records to break through a
4529 wildcarded host restriction in an ACL.
4531 37. If a user filter or a system filter that ran in a subprocess used any of
4532 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4533 the wrong values were passed to the pipe command ($thisaddress had the
4534 value of $0, $0 had the value of $1, etc). This bug was introduced by
4535 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4537 38. Improved the line breaking for long SMTP error messages from ACLs.
4538 Previously, if there was no break point between 40 and 75 characters, Exim
4539 left the rest of the message alone. Two changes have been made: (a) I've
4540 reduced the minimum length to 35 characters; (b) if it can't find a break
4541 point between 35 and 75 characters, it looks ahead and uses the first one
4542 that it finds. This may give the occasional overlong line, but at least the
4543 remaining text gets split now.
4545 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4546 file descriptors might be low, and that setting 1000 would always raise it.
4547 It turns out that in some environments, the limit is already over 1000 and
4548 that lowering it causes trouble. So now Exim takes care not to decrease it.
4550 40. When delivering a message, the value of $return_path is set to $sender_
4551 address at the start of routing (routers may change the value). By an
4552 oversight, this default was not being set up when an address was tested by
4553 -bt or -bv, which affected the outcome if any router or filter referred to
4556 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4557 log only when "message" or "log_message" are set. However, if one of the
4558 conditions was an address verification, or a call to a nested ACL, the
4559 messages generated by the underlying test were being passed through. This
4560 no longer happens. The underlying message is available in $acl_verify_
4561 message for both "message" and "log_message" expansions, so it can be
4562 passed through if needed.
4564 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4565 new expansion $bh_ to give the encoded byte string without charset
4566 translation. Translation happens only if iconv() is available; HAVE_ICONV
4567 indicates this at build time. HEADERS_CHARSET gives the charset to
4568 translate to; headers_charset can change it in the configuration, and
4569 "headers charset" can change it in an individual filter file.
4571 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4572 that creates RFC 2047 encoded "words" labels them as that charset instead
4573 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4574 expansion operator; (ii) when Exim creates a From: line for a local
4575 message; (iii) when a header line is rewritten to include a "phrase" part.
4577 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4578 buggy, causing it to skip the first lines of messages whose message ID
4579 ended in 'D'. This would not have bitten before Exim release 4.14, because
4580 message IDs were unlikely to end in 'D' before then. The effect was to have
4581 incorrect size information for certain domains.
4583 45. #include "config.h" was missing at the start of the crypt16.c module. This
4584 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4587 46. If there was a timeout during a "random" callout check, Exim treated it as
4588 a failure of the random address, and carried on sending RSET and the real
4589 address. If the delay was just some slowness somewhere, the response to the
4590 original RCPT would be taken as a response to RSET and so on, causing
4591 mayhem of various kinds.
4593 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4594 when I implemented it. It didn't allow for the fact that some option values
4595 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4596 the right test for positive values.
4598 48. Domain names in DNS records are case-independent. Exim always looks them up
4599 in lower case. Some resolvers return domain names in exactly the case they
4600 appear in the zone file, that is, they may contain uppercase letters. Not
4601 all resolvers do this - some return always lower case. Exim was treating a
4602 change of case by a resolver as a change of domain, similar to a widening
4603 of a domain abbreviation. This triggered its re-routing code and so it was
4604 trying to route what was effectively the same domain again. This normally
4605 caused routing to fail (because the router wouldn't handle the domain
4606 twice). Now Exim checks for this case specially, and just changes the
4607 casing of the domain that it ultimately uses when it transmits the message
4610 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4613 50. If a filter generated a file delivery with a non-absolute name (possible if
4614 no home directory exists for the router), the forbid_file option was not
4617 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4618 the existing equality matching.
4620 52. Exim was using ints instead of ino_t variables in some places where it was
4621 dealing with inode numbers.
4623 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4624 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4625 called TMPDIR, and if it finds it is different, it changes its value.
4627 54. The smtp_printf() function is now made available to local_scan() so
4628 additional output lines can be written before returning. There is also an
4629 smtp_fflush() function to enable the detection of a dropped connection.
4630 The variables smtp_input and smtp_batched_input are exported to
4633 55. Changed the default runtime configuration: the message "Unknown user"
4634 has been removed from the ACL, and instead placed on the localuser router,
4635 using the cannot_route_message feature. This means that any verification
4636 failures that generate their own messages won't get overridden. Similarly,
4637 the "Unrouteable address" message that was in the ACL for unverifiable
4638 relay addresses has also been removed.
4640 56. Added hosts_avoid_esmtp to the smtp transport.
4642 57. The exicyclog script was not checking for the esoteric option
4643 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4644 will work only if exicyclog is run under the appropriate euid.
4646 58. Following a discussion on the list, the rules by which Exim recognises line
4647 endings on incoming messages have been changed. The -dropcr and drop_cr
4648 options are now no-ops, retained only for backwards compatibility. The
4649 following line terminators are recognized: LF CRLF CR. However, special
4650 processing applies to CR:
4652 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4653 nor a local message in the state where . is a terminator.
4655 (ii) If a bare CR is encountered in a header line, an extra space is added
4656 after the line terminator so as not to end the header. The reasoning
4657 behind this is that bare CRs in header lines are most likely either
4658 to be mistakes, or people trying to play silly games.
4660 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4661 was being incorrectly given as 18 bytes larger than it should have been.
4662 This is a VOB (very old bug).
4664 60. This may never have affected anything current, but just in case it has:
4665 When the local host is found other than at the start of a list of hosts,
4666 the local host, those with the same MX, and any that follow, are discarded.
4667 When the list in question was part of a longer list of hosts, the following
4668 hosts (not currently being processed) were also being discarded. This no
4669 longer happens. I'm not sure if this situation could ever has previously
4672 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4675 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4676 header. This is something that is recommended in a new Internet Draft, and
4677 is something that is documented as being done by Sendmail. There are two
4678 possible values. For messages generated by the autoreply transport, Exim
4681 Auto-Submitted: auto-replied
4683 whereas for all other generated messages (e.g. bounces) it adds
4685 Auto-Submitted: auto-generated
4687 63. The "personal" condition in filters now includes a test for the
4688 Auto-Submitted: header. If it contains the string "auto-" the message it
4689 not considered personal.
4691 64. Added rcpt_include_affixes as a generic transport option.
4693 65. Added queue_only_override (default true).
4695 66. Added the syslog_duplication option.
4697 67. If what should have been the first header line of a message consisted of
4698 a space followed by a colon, Exim was mis-interpreting it as a header line.
4699 It isn't of course - it is syntactically invalid and should therefore be
4700 treated as the start of the message body. The misbehaviour could have
4701 caused a number of strange effects, including loss of data in subsequent
4702 header lines, and spool format errors.
4704 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4705 client host had authenticated. This control can now be exercised by an ACL
4706 for more flexibility.
4708 69. By default, callouts do not happen when testing with -bh. There is now a
4709 variant, -bhc, which does actually run the callout code, including
4710 consulting and updating the callout cache.
4712 70. Added support for saslauthd authentication, courtesy of Alexander
4715 71. If statvfs() failed on the spool or log directories while checking their
4716 size for availability, Exim confusingly gave the error "space shortage".
4717 Furthermore, in debugging mode it crashed with a floating point exception.
4718 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4719 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4720 serious problem, Exim now writes to the main and panic logs when this
4721 happens, with details of the failure. It then refuses to accept the
4722 incoming message, giving the message "spool directory problem" or "log
4723 directory problem" with a 421 code for SMTP messages.
4725 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4726 0, 1, and 2 exist, because some OS complain for execs without them (see
4727 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4728 descriptors. However, the code omitted to check that the open succeeded,
4729 causing mysterious errors if for some reason the permissions on /dev/null
4730 got screwed. Now Exim writes a message to the main and panic logs, and
4731 bombs out if it can't open /dev/null.
4733 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4734 interact so that it is all more flexible. It is supposed to remain
4735 backwards compatible. Also added extra_local_interfaces.
4737 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4738 to bomb out with an assertion failure - to the client this appears as a
4739 connection drop. This problem occurs in the part of the code that was taken
4740 from the Samba project. Fortunately, the assertion is in a very simple
4741 function, so I have fixed this by reproducing the function inline in the
4742 one place where it is called, and arranging for authentication to fail
4743 instead of killing the process with assert().
4745 75. The SPA client code was not working when the server requested OEM rather
4746 than Unicode encoding.
4748 76. Added code to make require_files with a specific uid setting more usable in
4749 the case where statting the file as root fails - usually a non-root-mounted
4750 NFS file system. When this happens and the failure is EACCES, Exim now
4751 forks a subprocess and does the per-uid checking as the relevant uid.
4753 77. Added process_log_path.
4755 78. If log_file_path was not explicitly set, a setting of check_log_space or
4756 check_log_inodes was ignored.
4758 79. If a space check for the spool or log partitions fails, the incident is now
4759 logged. Of course, in the latter case the data may get lost...
4761 80. Added the %p formatting code to string_format() so that it can be used to
4762 print addresses in debug_print(). Adjusted all the address printing in the
4763 debugging in store.c to use %p rather than %d.
4765 81. There was a concern that a line of code in smtp_in.c could overflow a
4766 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4767 initially expressed, the concern was not well-founded, because trailing
4768 spaces are removed early. However, if the trailing spaces were followed by
4769 a NULL, they did not get removed, so the overflow was possible. Two fixes
4772 (a) I re-wrote the offending code in a cleaner fashion.
4773 (b) If an incoming SMTP command contains a NULL character, it is rejected
4776 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4777 runs initgroups(), so that if the Exim user is in any additional groups,
4778 they will be used during message reception.
4784 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob