1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.531 2007/09/04 08:18:12 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
6 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
7 as mailq or other aliases. Changed the --help handling significantly
8 to do whats expected. exim_usage() emits usage/help information.
13 PH/01 Another patch from the Sieve maintainer.
15 PH/02 When an IPv6 address is converted to a string for single-key lookup
16 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
17 dots are used instead of colons so that keys in lsearch files need not
18 contain colons. This was done some time before quoting was made available
19 in lsearch files. However, iplsearch files do require colons in IPv6 keys
20 (notated using the quote facility) so as to distinguish them from IPv4
21 keys. This meant that lookups for IP addresses in host lists did not work
22 for iplsearch lookups.
24 This has been fixed by arranging for IPv6 addresses to be expressed with
25 colons if the lookup type is iplsearch. This is not incompatible, because
26 previously such lookups could never work.
28 The situation is now rather anomolous, since one *can* have colons in
29 ordinary lsearch keys. However, making the change in all cases is
30 incompatible and would probably break a number of configurations.
32 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
35 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
36 conversion specification without a maximum field width, thereby enabling
37 a rogue spamd server to cause a buffer overflow. While nobody in their
38 right mind would setup Exim to query an untrusted spamd server, an
39 attacker that gains access to a server running spamd could potentially
40 exploit this vulnerability to run arbitrary code as the Exim user.
42 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
43 $primary_hostname instead of what libspf2 thinks the hosts name is.
45 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
46 a directory entry by the name of the lookup key. Previously, if a
47 symlink pointed to a non-existing file or a file in a directory that
48 Exim lacked permissions to read, a lookup for a key matching that
49 symlink would fail. Now it is enough that a matching directory entry
50 exists, symlink or not. (Bugzilla 503.)
52 PH/03 The body_linecount and body_zerocount variables are now exported in the
55 PH/04 Added the $dnslist_matched variable.
57 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
58 This means they are set thereafter only if the connection becomes
61 PH/06 Added the client_condition to authenticators so that some can be skipped
62 by clients under certain conditions.
64 PH/07 The error message for a badly-placed control=no_multiline_responses left
65 "_responses" off the end of the name.
67 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
69 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
70 (without spaces) instead of just copying the configuration text.
72 PH/10 Added the /noupdate option to the ratelimit ACL condition.
74 PH/11 Added $max_received_linelength.
76 PH/12 Added +ignore_defer and +include_defer to host lists.
78 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
79 way in which PCRE > 7.0 is built.
81 PH/14 Implemented queue_only_load_latch.
83 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
84 MAIL command. The effect was to mangle the value on 64-bit systems.
86 PH/16 Another patch from the Sieve maintainer.
88 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
90 PH/18 If a system quota error occurred while trying to create the file for
91 a maildir delivery, the message "Mailbox is full" was not appended to the
92 bounce if the delivery eventually timed out. Change 4.67/27 below applied
93 only to a quota excession during the actual writing of the file.
95 PH/19 It seems that peer DN values may contain newlines (and other non-printing
96 characters?) which causes problems in log lines. The DN values are now
97 passed through string_printing() before being added to log lines.
99 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
100 and InterBase are left for another time.)
102 PH/21 Added message_body_newlines option.
104 PH/22 Guard against possible overflow in moan_check_errorcopy().
106 PH/23 POSIX allows open() to be a macro; guard against that.
108 PH/24 If the recipient of an error message contained an @ in the local part
109 (suitably quoted, of course), incorrect values were put in $domain and
110 $local_part during the evaluation of errors_copy.
116 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
117 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
120 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
121 issue a MAIL command.
123 PH/02 In an ACL statement such as
125 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
127 if a client was not listed at all, or was listed with a value other than
128 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
129 the condition was not true (as it should be), so access was not denied.
130 The bug was that the ! inversion was incorrectly passed on to the second
131 item. This has been fixed.
133 PH/03 Added additional dnslists conditions == and =& which are different from
134 = and & when the dns lookup returns more than one IP address.
136 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
137 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
139 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
140 FSYNC, which compiles an option called disable_fsync that allows for
141 bypassing fsync(). The documentation is heavily laced with warnings.
143 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
145 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
146 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
147 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
148 including adding "make clean"; (3) Added -fPIC when compiling the test
149 dynamically loaded module, to get rid of a warning.
151 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
152 message fails, move_frozen_messages = true and ignore_bounce_errors_after
153 = 0s. The bug is otherwise harmless.
155 PH/07 There was a bug in the dovecot authenticator such that the value of
156 $auth1 could be overwritten, and so not correctly preserved, after a
157 successful authentication. This usually meant that the value preserved by
158 the server_setid option was incorrect.
160 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
162 PH/09 Installed PCRE release 7.0.
164 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
165 run for batched SMTP input. It is now run at the start of every message
166 in the batch. While fixing this I discovered that the process information
167 (output by running exiwhat) was not always getting set for -bs and -bS
168 input. This is fixed, and it now also says "batched" for BSMTP.
170 PH/11 Added control=no_pipelining.
172 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
173 patch, slightly modified), and move the expansion of helo_data till after
174 the connection is made in the smtp transport (so it can use these
177 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
179 PH/14 Added log_selector = +pid.
181 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
183 PH/16 Add ${if forany and ${if forall.
185 PH/17 Added dsn_from option to vary the From: line in DSNs.
187 PH/18 Flush SMTP output before performing a callout, unless control =
188 no_callout_flush is set.
190 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
191 was true (the default) a successful delivery failed to delete the retry
192 item, thus causing premature timeout of the address. The bug is now
195 PH/20 Added hosts_avoid_pipelining to the smtp transport.
197 PH/21 Long custom messages for fakedefer and fakereject are now split up
198 into multiline reponses in the same way that messages for "deny" and
199 other ACL rejections are.
201 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
202 with slight modification.
204 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
205 draft, changing the syntax and factoring some duplicate code".
207 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
208 for deliveries of the second and subsequent messages over the same SMTP
211 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
212 ${reduce, with only minor "tidies".
214 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
216 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
217 expansion side effects.
219 PH/27 When a message times out after an over-quota error from an Exim-imposed
220 quota, the bounce message says "mailbox is full". This message was not
221 being given when it was a system quota that was exceeded. It now should
224 MH/03 Made $recipients available in local_scan(). local_scan() already has
225 better access to the recipient list through recipients_list[], but
226 $recipients can be useful in postmaster-provided expansion strings.
228 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
229 in the case of a MAIL command with additional options following the
230 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
231 were accidentally chopped off.
233 PH/29 SMTP synchronization checks are implemented when a command is read -
234 there is a check that no more input is waiting when there shouldn't be
235 any. However, for some commands, a delay in an ACL can mean that it is
236 some time before the response is written. In this time, more input might
237 arrive, invalidly. So now there are extra checks after an ACL has run for
238 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
239 pipelining has not been advertised.
241 PH/30 MH's patch to allow iscntrl() characters to be list separators.
243 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
244 returned in the SMTP response when smtp_return_error_details was false.
247 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
248 instead of the C I/O that was originally supplied, because problems were
251 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
252 Exim which did not show up earlier: it was assuming that a call to
253 SSL_CTX_set_info_callback() might give an error value. In fact, there is
254 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
255 was a macro that became an assignment, so it seemed to work. This has
256 changed to a proper function call with a void return, hence the compile
257 error. Exim's code has been fixed.
259 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
262 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
264 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
266 PH/37 If a message is not accepted after it has had an id assigned (e.g.
267 because it turns out to be too big or there is a timeout) there is no
268 "Completed" line in the log. When some messages of this type were
269 selected by exigrep, they were listed as "not completed". Others were
270 picked up by some special patterns. I have improved the selection
271 criteria to be more general.
273 PH/38 The host_find_failed option in the manualroute router can now be set
274 to "ignore", to completely ignore a host whose IP address cannot be
275 found. If all hosts are ignored, the behaviour is controlled by the new
276 host_all_ignored option.
278 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
279 homing or because of multiple MX records with /mx) generated more than
280 one IP address, and the following item turned out to be the local host,
281 all the secondary addresses of the first item were incorrectly removed
282 from the list, along with the local host and any following hosts (which
283 is what is supposed to happen).
285 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
286 whoever called Exim into the -H file. In the case of the daemon it was
287 behaving confusingly. When first started, it used values for whoever
288 started the daemon, but after a SIGHUP it used the Exim user (because it
289 calls itself on a restart). I have changed the code so that it now always
292 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
293 message are rejected with the same error (e.g. no authentication or bad
294 sender address), and a DATA command is nevertheless sent (as can happen
295 with PIPELINING or a stupid MUA), the error message that was given to the
296 RCPT commands is included in the rejection of the DATA command. This is
297 intended to be helpful for MUAs that show only the final error to their
300 PH/42 Another patch from the Sieve maintainer.
302 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
303 Eximstats - Fixed some broken HTML links and added missing column headers
305 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
306 columns for Rejects, Temp Rejects, Ham, and Spam rows.
308 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
310 PH/43 Yet another patch from the Sieve maintainer.
312 PH/44 I found a way to check for a TCP/IP connection going away before sending
313 the response to the final '.' that terminates a message, but only in the
314 case where the client has not sent further data following the '.'
315 (unfortunately, this is allowed). However, in many cases there won't be
316 any further data because there won't be any more messages to send. A call
317 to select() can be used: if it shows that the input is "ready", there is
318 either input waiting, or the socket has been closed. An attempt to read
319 the next input character can distinguish the two cases. Previously, Exim
320 would have sent an OK response which the client would never have see.
321 This could lead to message repetition. This fix should cure that, at
322 least in a lot of common cases.
324 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
325 advertised in response to EHLO.
331 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
332 fixed by 4.65/MH/01 (is this a record?) are fixed:
334 (i) An empty string was always treated as zero by the numeric comparison
335 operators. This behaviour has been restored.
337 (ii) It is documented that the numeric comparison operators always treat
338 their arguments as decimal numbers. This was broken in that numbers
339 starting with 0 were being interpreted as octal.
341 While fixing these problems I realized that there was another issue that
342 hadn't been noticed. Values of message_size_limit (both the global option
343 and the transport option) were treated as octal if they started with 0.
344 The documentation was vague. These values are now always treated as
345 decimal, and I will make that clear in the documentation.
351 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
352 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
355 MH/01 Don't check that the operands of numeric comparison operators are
356 integers when their expansion is in "skipping" mode (fixes bug
357 introduced by 4.64-PH/07).
359 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
360 child addresses, Exim now panics and dies. Previously, because the count
361 is held in a short int, deliveries were likely to be lost. As such a
362 large number of recipients for a single message is ridiculous
363 (performance will be very, very poor), I have chosen to impose a limit
364 rather than extend the field.
370 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
371 leftover -K file (the existence of which was triggered by #402).
372 While we were at it, introduced process PID as part of the -K
373 filename. This should rule out race conditions when creating
376 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
377 processing considerably. Previous code took too long for large mails,
378 triggering a timeout which in turn triggers #401.
380 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
381 in the DK code in transports.c. sendfile() is not really portable,
382 hence the _LINUX specificness.
384 TF/01 In the add_headers option to the mail command in an Exim filter,
385 there was a bug that Exim would claim a syntax error in any
386 header after the first one which had an odd number of characters
389 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
390 callout verification, Exim cached a "reject" for the entire domain. This
391 is correct for most verifications, but it is not correct for a recipient
392 verification with use_sender or use_postmaster set, because in that case
393 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
394 case of MAIL FROM:<> rejection from other early rejections (e.g.
395 rejection of HELO). When verifying a recipient using a non-null MAIL
396 address, the cache is ignored if it shows MAIL FROM:<> rejection.
397 Whatever the result of the callout, the value of the domain cache is
398 left unchanged (for any other kind of callout, getting as far as trying
399 RCPT means that the domain itself is ok).
401 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
404 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
405 manifest itself as EPIPE rather than ECONNECT. When tidying away a
406 session, the daemon ignores ECONNECT errors and logs others; it now
407 ignores EPIPE as well.
409 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
410 (quoted-printable decoding).
412 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
413 later the small subsequent patch to fix an introduced bug.
415 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
417 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
419 PH/08 An error is now given if message_size_limit is specified negative.
421 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
422 to be given (somewhat) arbitrary names.
424 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
427 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
428 miscellaneous code fixes
430 PH/10 Added the log_reject_target ACL modifier to specify where to log
433 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
434 hostname. This is wrong, because it relates to the incoming message (and
435 probably the interface on which it is arriving) and not to the outgoing
436 callout (which could be using a different interface). This has been
437 changed to use the value of the helo_data option from the smtp transport
438 instead - this is what is used when a message is actually being sent. If
439 there is no remote transport (possible with a router that sets up host
440 addresses), $smtp_active_hostname is used.
442 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
443 tweaks were necessary in order to get it to work (see also 21 below):
444 (a) The code assumed that strncpy() returns a negative number on buffer
445 overflow, which isn't the case. Replaced with Exim's string_format()
447 (b) There were several signed/unsigned issues. I just did the minimum
448 hacking in of casts. There is scope for a larger refactoring.
449 (c) The code used strcasecmp() which is not a standard C function.
450 Replaced with Exim's strcmpic() function.
451 (d) The code set only $1; it now sets $auth1 as well.
452 (e) A simple test gave the error "authentication client didn't specify
453 service in request". It would seem that Dovecot has changed its
454 interface. Fortunately there's a specification; I followed it and
455 changed what the client sends and it appears to be working now.
457 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
460 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
461 address A is aliased to B and C, where B exists and C does not. Without
462 -v the output is "A verified" because verification stops after a
463 successful redirection if more than one address is generated. However,
464 with -v the child addresses are also verified. Exim was outputting "A
465 failed to verify" and then showing the successful verification for C,
466 with its parentage. It now outputs "B failed to verify", showing B's
467 parentage before showing the successful verification of C.
469 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
470 look up a TXT record in a specific list after matching in a combined
473 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
474 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
475 they consult the DNS. I had assumed they would set it the way they
476 wanted; and indeed my experiments on Linux seem to show that in some
477 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
478 To be on the safe side, however, I have now made the interface to
479 host_find_byname() similar to host_find_bydns(), with an argument
480 containing the DNS resolver options. The host_find_byname() function now
481 sets these options at its start, just as host_find_bydns() does. The smtp
482 transport options dns_qualify_single and dns_search_parents are passed to
483 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
484 of host_find_byname() use the default settings of RES_DEFNAMES
485 (qualify_single) but not RES_DNSRCH (search_parents).
487 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
488 spool_read_header() do less string testing, by means of a preliminary
489 switch on the second character of optional "-foo" lines. (This is
490 overdue, caused by the large number of possibilities that now exist.
491 Originally there were few.) While I was there, I also converted the
492 str(n)cmp tests so they don't re-test the leading "-" and the first
493 character, in the hope this might squeeze out yet more improvement.
495 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
496 flag allowing group syntax was set by the header_syntax check but not
497 turned off, possible causing trouble later; (2) The flag was not being
498 set at all for the header_verify test, causing "group"-style headers to
499 be rejected. I have now set it in this case, and also caused header_
500 verify to ignore an empty address taken from a group. While doing this, I
501 came across some other cases where the code for allowing group syntax
502 while scanning a header line wasn't quite right (mostly, not resetting
503 the flag correctly in the right place). These bugs could have caused
504 trouble for malformed header lines. I hope it is now all correct.
506 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
507 with the "reply" argument non-NULL. The code, however (which originally
508 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
509 but it didn't always do it. This confused somebody who was copying the
510 code for some other use. I have removed all the tests.
512 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
513 feature that was used to support insecure browsers during the U.S. crypto
514 embargo. It requires special client support, and Exim is probably the
515 only MTA that supported it -- and would never use it because real RSA is
516 always available. This code has been removed, because it had the bad
517 effect of slowing Exim down by computing (never used) parameters for the
518 RSA_EXPORT functionality.
520 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
521 authenticator to fail if there's a tab character in the incoming data
522 (there should never be unless someone is messing about, as it's supposed
523 to be base64-encoded). Also added, on Timo's advice, the "secured" option
524 if the connection is using TLS or if the remote IP is the same as the
525 local IP, and the "valid-client-cert option" if a client certificate has
528 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
529 authenticators. This can be used for authorization after authentication
530 succeeds. (In the case of plaintext, it servers for both authentication
533 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
534 if any retry times were supplied.
536 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
537 connection, where there is no client IP address to check. In this
538 situation, the verify now always succeeds.
540 PH/25 Applied John Jetmore's -Mset patch.
542 PH/26 Added -bem to be like -Mset, but loading a message from a file.
544 PH/27 In a string expansion for a processed (not raw) header when multiple
545 headers of the same name were present, leading whitespace was being
546 removed from all of them, but trailing whitespace was being removed only
547 from the last one. Now trailing whitespace is removed from each header
548 before concatenation. Completely empty headers in a concatenation (as
551 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
552 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
554 PH/29 [Removed. This was a change that I later backed out, and forgot to
555 correct the ChangeLog entry (that I had efficiently created) before
556 committing the later change.]
558 PH/30 Exim was sometimes attempting to deliver messages that had suffered
559 address errors (4xx response to RCPT) over the same connection as other
560 messages routed to the same hosts. Such deliveries are always "forced",
561 so retry times are not inspected. This resulted in far too many retries
562 for the affected addresses. The effect occurred only when there were more
563 hosts than the hosts_max_try setting in the smtp transport when it had
564 the 4xx errors. Those hosts that it had tried were not added to the list
565 of hosts for which the message was waiting, so if all were tried, there
566 was no problem. Two fixes have been applied:
568 (i) If there are any address or message errors in an SMTP delivery, none
569 of the hosts (tried or untried) are now added to the list of hosts
570 for which the message is waiting, so the message should not be a
571 candidate for sending over the same connection that was used for a
572 successful delivery of some other message. This seems entirely
573 reasonable: after all the message is NOT "waiting for some host".
574 This is so "obvious" that I'm not sure why it wasn't done
575 previously. Hope I haven't missed anything, but it can't do any
576 harm, as the worst effect is to miss an optimization.
578 (ii) If, despite (i), such a delivery is accidentally attempted, the
579 routing retry time is respected, so at least it doesn't keep
580 hammering the server.
582 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
583 in ${readsocket because some servers need this prod.
585 PH/32 Added some extra debug output when updating a wait-xxx database.
587 PH/33 The hint "could be header name not terminated by colon", which has been
588 given for certain expansion errors for a long time, was not being given
589 for the ${if def:h_colon_omitted{... case.
591 PH/34 The spec says: "With one important exception, whenever a domain list is
592 being scanned, $domain contains the subject domain." There was at least
593 one case where this was not true.
595 PH/35 The error "getsockname() failed: connection reset by peer" was being
596 written to the panic log as well as the main log, but it isn't really
597 panic-worthy as it just means the connection died rather early on. I have
598 removed the panic log writing for the ECONNRESET error when getsockname()
601 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
602 runs only) independently of the message's sender address. This meant
603 that, if the 4xx error was in fact related to the sender, a different
604 message to the same recipient with a different sender could confuse
605 things. In particualar, this can happen when sending to a greylisting
606 server, but other circumstances could also provoke similar problems.
607 I have changed the default so that the retry time for these errors is now
608 based a combination of the sender and recipient addresses. This change
609 can be overridden by setting address_retry_include_sender=false in the
612 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
613 remote server are returned as part of bounce messages. This was not
614 happening for LMTP over a pipe (the lmtp transport), but now it is the
615 same for both kinds of LMTP.
617 PH/38 Despite being documented as not happening, Exim was rewriting addresses
618 in header lines that were in fact CNAMEs. This is no longer the case.
620 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
621 and queue runs started by the daemon processed all messages. This has
622 been fixed so that -R and -S can now usefully be given with -q<time>.
624 PH/40 Import PCRE release 6.7 (fixes some bugs).
626 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
628 PH/42 Give an error if -q is specified more than once.
630 PH/43 Renamed the variables $interface_address and $interface_port as
631 $received_ip_address and $received_port, to make it clear that these
632 values apply to message reception, and not to the outgoing interface when
633 a message is delivered. (The old names remain recognized, of course.)
635 PH/44 There was no timeout on the connect() call when using a Unix domain
636 socket in the ${readsocket expansion. There now is.
638 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
639 be meaningful with "accept".
641 SC/01 Eximstats V1.43
642 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
644 SC/02 Eximstats V1.44
645 Use a glob alias rather than an array ref in the generated
646 parser. This improves both readability and performance.
648 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
649 Collect SpamAssassin and rejection statistics.
650 Don't display local sender or destination tables unless
651 there is data to show.
652 Added average volumes into the top table text output.
654 SC/04 Eximstats V1.46
655 Collect data on the number of addresses (recipients)
656 as well as the number of messages.
658 SC/05 Eximstats V1.47
659 Added 'Message too big' to the list of mail rejection
660 reasons (thanks to Marco Gaiarin).
662 SC/06 Eximstats V1.48
663 Mainlog lines which have GMT offsets and are too short to
664 have a flag are now skipped.
666 SC/07 Eximstats V1.49 (Alain Williams)
667 Added the -emptyok flag.
669 SC/08 Eximstats V1.50
670 Fixes for obtaining the IP address from reject messages.
672 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
673 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
674 whitesspace changes from 4.64-PH/27
676 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
679 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
680 are found, allow negative numbers in numeric criteria)
682 JJ/06 exipick.20061117.2, added new $message_body_missing variable
684 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
685 to match changes made in 4.64-PH/43
687 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
689 PH/47 Put in an explicit test for a DNS lookup of an address record where the
690 "domain" is actually an IP address, and force a failure. This locks out
691 those revolvers/nameservers that support "A-for-A" lookups, in
692 contravention of the specifications.
694 PH/48 When a host name was looked up from an IP address, and the subsequent
695 forward lookup of the name timed out, the host name was left in
696 $sender_host_name, contrary to the specification.
698 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
699 restricted to single-key lookups, Exim was not diagnosing an error if
700 * or *@ was used with a query-style lookup.
702 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
704 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
705 long ago, but noone interested enough thought of it. Let's just say that
706 the "1.1" means that there are some new functions that weren't there at
707 some point in the past.
709 PH/51 Error processing for expansion failure of helo_data from an smtp
710 transport during callout processing was broken.
712 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
713 tested/used via the -bh/-bhc/-bs options.
715 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
716 bug, fixed in subsequent PCRE releases).
718 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
719 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
721 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
727 SC/01 Use a glob alias rather than an array ref in eximstats generated
728 parser. This improves both readability and performance.
730 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
731 Don't display local sender or destination tables in eximstats unless
732 there is data to show.
733 Added average volumes into the eximstats top table text output.
735 SC/03 Collect data on the number of addresses (recipients) as well
736 as the number of messages in eximstats.
738 TF/01 Correct an error in the documentation for the redirect router. Exim
739 does (usually) call initgroups() when daemonizing.
741 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
742 with consistent privilege compared to when running as a daemon.
744 TF/03 Note in the spec that $authenticated_id is not set for local
745 submissions from trusted users.
747 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
748 Thanks to Dean Brooks <dean@iglou.com> for the patch.
750 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
751 by adding some example configuration directives to the default
752 configuration file. A little bit of work is required to uncomment the
753 directives and define how usernames and passwords are checked, but
754 there is now a framework to start from.
756 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
757 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
758 without this. I don't know how relevant this is to other LDAP libraries.
760 PH/02 Add the verb name to the "unknown ACL verb" error.
762 PH/03 Magnus Holmgren's patch for filter_prepend_home.
764 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
766 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
767 directory not expanded when it should be if an expanded home directory
768 was set for the address (which is overridden by the transport).
770 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
773 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
774 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
775 because it is too late at that time, and has no effect.
777 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
778 security issue with \' (bugzilla #107). I could not use the
779 PQescapeStringConn() function, because it needs a PGconn value as one of
782 PH/08 When testing addresses using -bt, indicate those final addresses that
783 are duplicates that would not cause an additional delivery. At least one
784 person was confused, thinking that -bt output corresponded to deliveries.
785 (Suppressing duplicates isn't a good idea as you lose the information
786 about possibly different redirections that led to the duplicates.)
788 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
789 systems where poll() doesn't work, in particular OS X.
791 PH/10 Added more information to debugging output for retry time not reached.
793 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
794 operations in malware.c.
796 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
799 PH/13 If write_rejectlog was set false when logging was sent to syslog with
800 syslog_duplication set false, log lines that would normally be written
801 both the the main log and to the reject log were not written to syslog at
804 PH/14 In the default configuration, change the use of "message" in ACL warn
805 statements to "add_header".
807 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
808 not followed by a command (e.g. "seen endif").
810 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
811 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
814 PH/17 Added extra conditions to the default value of delay_warning_condition
818 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
819 { match{$h_precedence:}{(?i)bulk|list|junk} } \
820 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
823 The Auto-Submitted: and various List- headers are standardised, whereas I
824 don't think Precedence: ever was.
826 PH/18 Refactored debugging code in route_finduser() to show more information,
827 in particular, the error code if getpwnam() issues one.
829 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
830 This is apparently needed in addition to the PH/07 change above to avoid
831 any possible encoding problems.
833 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
834 but not after initializing Perl.
836 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
837 output them only if debugging. By default they are written stderr,
838 apparently, which is not desirable.
840 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
843 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
846 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
848 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
849 authenticated or an ident call has been made. Suppress the default
850 values for $authenticated_id and $authenticated_sender (but permit -oMai
851 and -oMas) when testing with -bh.
853 PH/24 Re-jigged the order of the tests in the default configuration so that the
854 tests for valid domains and recipients precede the DNS black list and CSA
855 tests, on the grounds that those ones are more expensive.
857 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
858 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
859 This bug exists in every version of Exim that I still have, right back to
862 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
863 However, an attempt to turn on case-sensitivity in a regex key by
864 including (?-i) didn't work because the subject string was already
865 lowercased, and the effects were non-intuitive. It turns out that a
866 one-line patch can be used to allow (?-i) to work as expected.
872 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
873 other effects) broke the use of negated acl sub-conditions.
875 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
878 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
879 "Deny" causes Exim to reject the incoming connection with a 554 error.
880 Unfortunately, if there is a major crisis, such as a disk failure,
881 tcp-wrappers gives "deny", whereas what one would like would be some
882 kind of temporary error. A kludge has been added to help with this.
883 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
884 554 error is used if errno is still zero or contains ENOENT (which occurs
885 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
888 PH/03 Add -lutil to the default FreeBSD LIBS setting.
890 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
891 errors. Otherwise a message that provokes a temporary error (when other
892 messages do not) can cause a whole host to time out.
894 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
895 addresses were routed directly to files or pipes from a redirect router.
896 File deliveries just didn't batch; pipe deliveries might have suffered
899 PH/06 A failure to get a lock for a hints database would erroneously always say
900 "Failed to get write lock", even when it was really a read lock.
902 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
903 of 0600. This has been changed to use the value of the lockfile_mode
904 option (which defaults to 0600).
906 PH/08 Applied small patch from the Sieve maintainer.
908 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
909 folder from quota calculations, a direct delivery into this folder messed
910 up the contents of the maildirsize file. This was because the regex was
911 used only to exclude .Trash (or whatever) when the size of the mailbox
912 was calculated. There was no check that a delivery was happening into an
913 excluded directory. This bug has been fixed by ignoring all quota
914 processing for deliveries into excluded directories.
916 PH/10 Added the maildirfolder_create_regex option to appendfile.
922 PH/01 The code for finding all the local interface addresses on a FreeBSD
923 system running IPv6 was broken. This may well have applied to all BSD
924 systems, as well as to others that have similar system calls. The broken
925 code found IPv4 interfaces correctly, but gave incorrect values for the
926 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
927 that it would not match correctly against @[] and not recognize the IPv6
930 PH/02 The ipliteral router was not recognizing addresses of the form user@
931 [ipv6:....] because it didn't know about the "ipv6:" prefix.
933 PH/03 Added disable_ipv6.
935 PH/04 Changed $reply_address to use the raw form of the headers instead of the
936 decoded form, because it is most often used to construct To: headers
937 lines in autoreplies, and the decoded form may well be syntactically
938 invalid. However, $reply_address has leading white space removed, and all
939 newlines turned into spaces so that the autoreply transport does not
942 PH/05 If group was specified without a user on a router, and no group or user
943 was specified on a transport, the group from the router was ignored.
945 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
946 for visible compile-time settings that can be used to change these
947 numbers, for those that want even more. Backwards compatibility with old
948 spool files has been maintained. However, going back to a previous Exim
949 release will lost any variables that are in spool files.
951 PH/07 Two small changes when running in the test harness: increase delay when
952 passing a TCP/IP connection to a new process, in case the original
953 process has to generate a bounce, and remove special handling of
954 127.0.0.2 (sic), which is no longer necessary.
956 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
957 be the same on different OS.
959 PH/09 Moved a debug statement in filter processing to avoid a race problem when
962 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
963 whether --show-vars was specified or not
965 JJ/02 exipick: Added support for new ACL variable spool format introduced
968 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
969 syntactically invalid From: or Reply-to: line, and a filter used this to
970 generate an autoreply, and therefore failed to obtain an address for the
971 autoreply, Exim could try to deliver to a non-existent relative file
972 name, causing unrelated and misleading errors. What now happens is that
973 it logs this as a hard delivery error, but does not attempt to create a
976 PH/11 The exinext utility has a -C option for testing purposes, but although
977 the given file was scanned by exinext itself; it wasn't being passed on
978 when Exim was called.
980 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
981 an end-of-file indication when reading a command response.
983 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
984 compiled. In many other places in Exim, IPv6 addresses are always
985 recognized, so I have changed this. It also means that IPv4 domain
986 literals of the form [IPV4:n.n.n.n] are now always recognized.
988 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
989 used if the router is not running as root, for example, when verifying at
990 ACL time, or when using -bh. The debugging output from this situation was
991 non-existent - all you got was a failure to exec. I have made two
994 (a) Failures to set uid/gid, the current directory, or a process leader
995 in a subprocess such as that created by queryprogram now generate
996 suitable debugging ouput when -d is set.
998 (b) The queryprogram router detects when it is not running as root,
999 outputs suitable debugging information if -d is set, and then runs
1000 the subprocess without attempting to change uid/gid.
1002 PH/15 Minor change to Makefile for building test_host (undocumented testing
1005 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1006 additional section of a DNS packet that returns MX or SRV records.
1007 Instead, it always explicitly searches for A/AAAA records. This avoids
1008 major problems that occur when a DNS server includes only records of one
1009 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1010 fixed another bug: if SRV records were looked up and the corresponding
1011 address records were *not* found in the additional section, the port
1012 values from the SRV records were lost.
1014 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1015 using the correct key (the original address) when searching the retry
1016 rules in order to find which one to use for generating the retry hint.
1018 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1019 adding the default one. Similarly, if it contains a Reply-To: header, the
1020 errors_reply_to option, if set, is not used.
1022 PH/19 When calculating a retry time, Exim used to measure the "time since
1023 failure" by looking at the "first failed" field in the retry record. Now
1024 it does not use this if it is later than than the arrival time of the
1025 message. Instead it uses the arrival time. This makes for better
1026 behaviour in cases where some deliveries succeed, thus re-setting the
1027 "first failed" field. An example is a quota failure for a huge message
1028 when small messages continue to be delivered. Without this change, the
1029 "time since failure" will always be short, possible causing more frequent
1030 delivery attempts for the huge message than are intended.
1031 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1033 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1034 $1, $2, $3) because the numerical variables can be reset during some
1035 expansion items (e.g. "match"), thereby losing the authentication data.
1037 PH/21 Make -bV show the size of off_t variables so that the test suite can
1038 decide whether to run tests for quotas > 2G.
1040 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1041 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1042 filecount value is greater than 2G or if a quota value is greater than 2G
1043 on a system where the size of off_t is not greater than 4, a panic error
1046 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1047 never match. The debug and -bh output now contains an explicit error
1048 message indicating a malformed IPv4 address or mask.
1050 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1051 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1052 PH/23 above applies.
1054 PH/25 Do not write to syslog when running in the test harness. The only
1055 occasion when this arises is a failure to open the main or panic logs
1056 (for which there is an explicit test).
1058 PH/26 Added the /no_tell option to "control=freeze".
1060 PH/27 If a host name lookup failed very early in a connection, for example, if
1061 the IP address matched host_lookup and the reverse lookup yielded a name
1062 that did not have a forward lookup, an error message of the form "no IP
1063 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1064 could be logged. Now it outputs the IP address instead of "NULL".
1066 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1067 allows the sender and the authenticated sender to be set when
1068 submitting a message from within Exim. Since child_open_exim() is
1069 documented for local_scan(), the new function should be too.
1071 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1072 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1073 results in an empty string is now treated as unset.
1075 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1077 PH/31 Added sender_verify_fail logging option.
1079 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1080 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1081 tidied the source and removed it altogether.
1083 PH/33 When a queue run was abandoned because the load average was too high, a
1084 log line was always written; now it is written only if the queue_run log
1085 selector is set. In addition, the log line for abandonment now contains
1086 information about the queue run such as the pid. This is always present
1087 in "start" and "stop" lines but was omitted from the "abandon" line.
1089 PH/34 Omit spaces between a header name and the colon in the error message that
1090 is given when verify = headers_syntax fails (if there are lots of them,
1091 the message gets confusing).
1093 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1094 names, as there are now some PTR records that contain slashes. This check
1095 is only to protect against broken name servers that fall over on strange
1096 characters, so the fact that it applies to all lookups doesn't matter.
1098 PH/36 Now that the new test suite is complete, we can remove some of the
1099 special code in Exim that was needed for the old test suite. For example,
1100 sorting DNS records because real resolvers return them in an arbitrary
1101 order. The new test suite's fake resolver always returns records in the
1104 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1105 bounces) except when queue_only is set, to avoid logging races between
1106 the different processes.
1108 PH/38 Panic-die if .include specifies a non-absolute path.
1110 PH/39 A tweak to the "H" retry rule from its user.
1112 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1113 a label. They prevented compilation on older perls.
1115 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1116 a warning to be raised on newish perls.
1118 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1119 on queue. Changes to match documented behaviour of showing count of
1120 messages matching specified criteria.
1122 PH/40 Changed the default ident timeout from 30s to 5s.
1124 PH/41 Added support for the use of login_cap features, on those BSD systems
1125 that have them, for controlling the resources used by pipe deliveries.
1127 PH/42 The content-scanning code uses fopen() to create files in which to put
1128 message data. Previously it was not paying any attention to the mode of
1129 the files. Exim runs with umask(0) because the rest of the code creates
1130 files with open(), and sets the required mode explicitly. Thus, these
1131 files were ending up world-writeable. This was not a big issue, because,
1132 being within the spool directory, they were not world-accessible. I have
1133 created a function called modefopen, which takes an additional mode
1134 argument. It sets umask(777), creates the file, chmods it to the required
1135 mode, then resets the umask. All the relevant calls to fopen() in the
1136 content scanning code have been changed to use this function.
1138 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1139 to 24 hours. This avoids potential overflow problems when processing G
1140 and H retry rules. I suspect nobody ever tinkers with this value.
1142 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1144 PH/45 When the plaintext authenticator is running as a client, the server's
1145 challenges are checked to ensure they are valid base64 strings. By
1146 default, the authentication attempt is cancelled if an invalid string is
1147 received. Setting client_ignore_invalid_base64 true ignores these errors.
1148 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1149 they are received. Thus, the responses can be made to depend on the
1150 challenges. If an invalid string is ignored, an empty string is placed in
1153 PH/46 Messages that are created by the autoreply transport now contains a
1154 References: header, in accordance with RFCs 2822 and 3834.
1156 PH/47 Added authenticated_sender_force to the smtp transport.
1158 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1160 PH/49 Installed latest patch from the Sieve maintainer.
1162 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1163 was also set, the appendfile transport was unnecessarily scanning a
1164 directory of message files (e.g. for maildir delivery) to find the count
1165 of files (along with the size), even though it did not need this
1166 information. It now does the scan only if it needs to find either the
1167 size of the count of files.
1169 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1171 PH/52 Two bugs concerned with error handling when the smtp transport is
1174 (i) Exim was not creating retry information for temporary errors given
1175 for individual recipients after the DATA command when the smtp transport
1176 was used in LMTP mode. This meant that they could be retried too
1177 frequently, and not timed out correctly.
1179 (ii) Exim was setting the flag that allows error details to be returned
1180 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1181 recipients that were returned after the DATA command.
1183 PH/53 This is related to PH/52, but is more general: for any failing address,
1184 when detailed error information was permitted to be returned to the
1185 sender, but the error was temporary, then after the final timeout, only
1186 "retry timeout exceeded" was returned. Now it returns the full error as
1187 well as "retry timeout exceeded".
1189 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1190 do this, and (what is worse) MTAs that accept it.
1192 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1193 will now be deprecated.
1195 PH/56 New os.c-cygwin from the Cygwin maintainer.
1197 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1198 formats (previously only available in exim formats via -bpr, -bpru,
1199 and -bpra. Now also available in native and exiqgrep formats)
1201 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1202 with very large, slow to parse queues
1204 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1206 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1208 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1209 responses to authentication challenges, though it was showing the
1210 challenges; (ii) I've removed the CR characters from the debug output for
1213 PH/58 Allow for the insertion of a newline as well as a space when a string
1214 is turned into more than one encoded-word during RFC 2047 encoding. The
1215 Sieve code now uses this.
1217 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1218 data_4xx, lost_connection, tls_required.
1220 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1221 message was being sent as an SMTP response.
1223 PH/61 Add -l and -k options to exicyclog.
1225 PH/62 When verifying, if an address was redirected to one new address, so that
1226 verification continued, and the new address failed or deferred after
1227 having set something in $address_data, the value of $address_data was not
1228 passed back to the ACL. This was different to the case when no
1229 redirection occurred. The value is now passed back in both cases.
1231 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1232 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1233 use login_cap.h, so on its own it isn't the distinguishing feature. The
1234 new name refers directly to the setclassresources() function.
1236 PH/65 Added configuration files for NetBSD3.
1238 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1240 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1241 is preferred over IPv4.
1243 PH/68 The bounce_return_message and bounce_return_body options were not being
1244 honoured for bounces generated during the reception of non-SMTP messages.
1245 In particular, this applied to messages rejected by the ACL. This bug has
1246 been fixed. However, if bounce_return_message is true and bounce_return_
1247 body is false, the headers that are returned for a non-SMTP message
1248 include only those that have been read before the error was detected.
1249 (In the case of an ACL rejection, they have all been read.)
1251 PH/69 The HTML version of the specification is now built in a directory called
1252 spec_html instead of spec.html, because the latter looks like a path with
1253 a MIME-type, and this confuses some software.
1255 PH/70 Catch two compiler warnings in sieve.c.
1257 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1258 function verify_get_ident() calls ip_connect() to connect a socket, but
1259 if the "connect()" function timed out, ip_connect() used to close the
1260 socket. However, verify_get_ident() also closes the socket later, and in
1261 between Exim writes to the log, which may get opened at this point. When
1262 the socket was closed in ip_connect(), the log could get the same file
1263 descriptor number as the socket. This naturally causes chaos. The fix is
1264 not to close the socket in ip_connect(); the socket should be closed by
1265 the function that creates it. There was only one place in the code where
1266 this was missing, in the iplookup router, which I don't think anybody now
1267 uses, but I've fixed it anyway.
1269 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1270 well as to direct DNS lookups. Otherwise the handling of names in host
1271 lists is inconsistent and therefore confusing.
1277 PH/01 Two changes to the default runtime configuration:
1279 (1) Move the checks for relay_from_hosts and authenticated clients from
1280 after to before the (commented out) DNS black list checks.
1282 (2) Add control=submission to the relay_from_hosts and authenticated
1283 clients checks, on the grounds that messages accepted by these
1284 statements are most likely to be submissions.
1286 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1288 (1) Generate an error if the third argument for the ${prvs expansion is
1291 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1294 (3) Reset the variables that are obtained from the first argument of
1295 ${prvscheck and used in the second argument before leaving the code,
1296 because their memory is reclaimed, so using them afterwards may do
1299 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1300 one (it's much easier than Tom thought :-).
1302 (5) Because of (4), we can now allow for the use of $prvscheck_result
1303 inside the third argument.
1305 PH/03 For some reason, the default setting of PATH when running a command from
1306 a pipe transport was just "/usr/bin". I have changed it to
1309 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1310 anything to be listed in the output from -bV.
1312 PH/05 When a filter generated an autoreply, the entire To: header line was
1313 quoted in the delivery log line, like this:
1315 => >A.N.Other <ano@some.domain> <original@ddress> ...
1317 This has been changed so that it extracts the operative address. There
1318 may be more than one such address. If so, they are comma-separated, like
1321 => >ano@some.domain,ona@other.domain <original@ddress> ...
1323 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1324 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1325 not being looked up in the rDNS to get a host name, Exim was showing the
1326 IP address twice in Received: lines, even though the IP addresses were
1327 identical. For example:
1329 Received: from [1.2.3.4] (helo=[1.2.3.4])
1331 However, if the real host name was known, it was omitting the HELO data
1332 if it matched the actual IP address. This has been tidied up so that it
1333 doesn't show the same IP address twice.
1335 PH/07 When both +timestamp and +memory debugging was on, the value given by
1336 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1337 called by the debug printing, thereby overwriting the timestamp buffer.
1338 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1340 PH/08 When the original message was included in an autoreply transport, it
1341 always said "this is a copy of the message, including all the headers",
1342 even if body_only or headers_only was set. It now gives an appropriate
1345 PH/09 Applied a patch from the Sieve maintainer which:
1347 o fixes some comments
1348 o adds the (disabled) notify extension core
1349 o adds some debug output for the result of if/elsif tests
1350 o points to the current vacation draft in the documentation
1351 and documents the missing references header update
1355 o fixes a bug in processing the envelope test (when testing
1356 multiple envelope elements, the last element determinted the
1359 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1360 Electronic Mail") by including:
1362 Auto-submitted: auto-generated
1364 in the messages that it generates (bounce messages and others, such as
1365 warnings). In the case of bounce messages for non-SMTP mesages, there was
1366 also a typo: it was using "Auto_submitted" (underscore instead of
1367 hyphen). Since every message generated by Exim is necessarily in response
1368 to another message, thes have all been changed to:
1370 Auto-Submitted: auto-replied
1372 in accordance with these statements in the RFC:
1374 The auto-replied keyword:
1376 - SHOULD be used on messages sent in direct response to another
1377 message by an automatic process,
1379 - MUST NOT be used on manually-generated messages,
1381 - MAY be used on Delivery Status Notifications (DSNs) and Message
1382 Disposition Notifications (MDNs),
1384 - MUST NOT be used on messages generated by automatic or periodic
1385 processes, except for messages which are automatic responses to
1388 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1389 to the default Received: header definition.
1391 PH/12 Added log selector acl_warn_skipped (default on).
1393 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1394 variables because (a) they are in the wrong storage pool and (b) even if
1395 they were copied, it wouldn't work properly because of the caching.
1397 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1398 checking when decoding. Apparently there are clients that generate
1399 overlong encoded strings. Why am I not surprised?
1401 PH/15 If the first argument of "${if match_address" was not empty, but did not
1402 contain an "@" character, Exim crashed. Now it writes a panic log message
1403 and treats the condition as false.
1405 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1407 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1408 extension "envelope-auth". The code is finished and in agreement with
1409 other implementations, but there is no documentation so far and in fact,
1410 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1411 not changing the active code.
1413 Print executed "if" and "elsif" statements when debugging is used. This
1414 helps a great deal to understand what a filter does.
1416 Document more things not specified clearly in RFC3028. I had all this
1417 sorted out, when out of a sudden new issues came to my mind. Oops."
1419 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1422 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1423 canonical form (as documented). However, after a host name lookup from
1424 the IP address, check_host() was doing a simple string comparison with
1425 addresses acquired from the DNS when checking that the found name did
1426 have the original IP as one of its addresses. Since any found IPv6
1427 addresses are likely to be in abbreviated form, the comparison could
1428 fail. Luckily, there already exists a function for doing the comparison
1429 by converting both addresses to binary, so now that is used instead of
1430 the text comparison.
1432 PH/20 There was another similar case to PH/19, when a complete host name was
1433 given in a host list; looking up its IP address could give an abbreviated
1434 form, whereas the current host's name might or might not be abbreviated.
1435 The same fix has been applied.
1441 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1442 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1445 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1446 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1448 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1450 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1451 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1452 Also, for "Auto-Submitted", treat anything other than "no" as
1453 non-personal, in accordance with RFC 3834. (Previously it treated
1454 anything starting "auto-" as non-personal.)
1456 TF/01 The control=submission/name=... option had a problem with syntax
1457 errors if the name included a slash character. The /name= option
1458 now slurps the rest of the string, so it can include any characters
1459 but it must come last in the list of options (after /sender_retain
1462 PH/05 Some modifications to the interface to the fake nameserver for the new
1470 TK/01 Added the "success_on_redirect" address verification option. See
1471 NewStuff for rationale and an example.
1473 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1475 PH/02 Patch to exigrep to allow it to work on syslog lines.
1477 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1478 fread() to skip over the body file's header line, because in Cygwin the
1479 header line is locked and is inaccessible.
1481 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1482 co-exist for some time) to make it clear that it is the Exim ID that is
1483 referenced, not the Message-ID: header line.
1485 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1486 string_format() function, because snprintf() does not exist on all
1489 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1490 ${stat: expansion item.
1492 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1493 protocol synchronization error", to keep the pedants happy.
1495 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1496 well as for IRIX systems, when gcc is being used. See the host.c source
1499 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1501 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1504 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1505 transport and to the smtp transport in LMTP mode.
1507 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1509 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1510 run a filter in a subprocess. This could lead to confusion in subsequent
1511 lookups in the parent process. There should also be a search_tidyup() at
1512 the end of the subprocess.
1514 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1515 only if the host matched helo_try_verify_hosts, which caused the
1516 verification to occur when the EHLO/HELO command was issued. The ACL just
1517 tested the remembered result. Now, if a previous verification attempt has
1518 not happened, "verify = helo" does it there and then.
1520 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1522 TK/03 Fix log output including CR from clamd.
1524 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1525 exist provoked a memory error which could cause a segfault.
1527 PH/15 Installed PCRE 6.2
1529 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1531 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1532 of the problem. Specifically, suggested +O2 rather than +O1 for the
1535 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1537 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1538 record, the port was not correctly logged when the outgoing_port log
1539 selector was set (it logged the transort's default port).
1541 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1542 fallback_hosts, and "hosts" in the smtp transport.
1544 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1545 host errors such as "Connection refused".
1547 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1548 authentication with radiusclient 0.4.9:
1550 - Error returned from rc_read_config was caught wrongly
1551 - Username/password not passed on to radius server due to wrong length.
1553 The presumption is that some radiusclient API changes for 4.51/PH/17
1554 were not taken care of correctly. The code is still untested by me (my
1555 Linux distribution still has 0.3.2 of radiusclient), but it was
1556 contributed by a Radius user.
1558 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1559 expanding the "port" option of the smtp transport.
1561 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1562 while reading a MIME header. Thanks to Tom Hughes for a patch.
1564 PH/24 Include config.h inside local_scan.h so that configuration settings are
1567 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1568 that in an ACL for RCPT (for example), you can examine exactly what was
1571 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1572 commands, but it was not correctly comparing the address with the actual
1573 client host address. Thus, it would show the EHLO address in Received:
1574 header lines when this was not necessary.
1576 PH/27 Added the % operator to ${eval:}.
1578 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1579 it should be ignoring failures (because with -C, for example, it has lost
1580 privilege). It wasn't ignoring creation failures other than "already
1583 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1586 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1587 because an input line was too long, either on its own, or by virtue of
1588 too many continuations, the temporary file was not being removed, and the
1589 return code was incorrect.
1591 PH/31 Missing "BOOL" in function definition in filtertest.c.
1593 PH/32 Applied Sieve patches from the maintainer.
1595 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1597 PH/33 Added "verify = not_blind".
1599 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1600 Local/Makefile (with some defaults set). These are used in built scripts
1601 such as exicyclog, but they have never been used in the exim_install
1602 script (though there are many overriding facilities there). I have
1603 arranged that the exim_install script now takes note of these two
1606 PH/35 Installed configuration files for Dragonfly.
1608 PH/36 When a locally submitted message by a trusted user did not contain a
1609 From: header, and the sender address was obtained from -f or from an SMTP
1610 MAIL command, and the trusted user did not use -F to supply a sender
1611 name, $originator_name was incorrectly used when constructing a From:
1612 header. Furthermore, $originator_name was used for submission mode
1613 messages from external hosts without From: headers in a similar way,
1614 which is clearly wrong.
1616 PH/37 Added control=suppress_local_fixups.
1618 PH/38 When log_selector = +received_sender was set, and the addition of the
1619 sender made the log line's construction buffer exactly full, or one byte
1620 less than full, an overflow happened when the terminating "\n" was
1623 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1624 when the result of a list match is failure because a DNS lookup failed.
1626 PH/40 RM_COMMAND is now used in the building process.
1628 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1629 the "build-* directories that it finds.
1631 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1632 address in a domain literal was a prefix of an interface address.
1634 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1635 when verifying a sender address, unless rewrite_headers is false.
1637 PH/44 Wrote a long comment about why errors_to addresses are verified as
1638 recipients, not senders.
1640 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1641 the ratelimit ACL was added.
1643 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1645 PH/46 Added extra information about PostgreSQL errors to the error string.
1647 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1648 avoiding the need to install special zones in a real server. This is
1649 backwards compatible; if it can't find the fake resolver, it drops back.
1650 Thus, both old and new test suites can be run.
1652 TF/02 Added util/ratelimit.pl
1654 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1655 clock is set back in time.
1657 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1658 Candler <B.Candler@pobox.com>.
1660 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1661 OK for addresses that are the result of redirections.
1663 PH/48 A number of further additions for the benefit of the new test suite,
1664 including a fake gethostbyname() that interfaces to the fake DNS resolver
1667 TF/06 The fix for widen_domains has also been applied to qualify_single and
1668 search_parents which are the other dnslookup options that can cause
1671 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1674 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1676 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1677 service" if it encountered an MX record with an empty target hostname.
1678 The message is now "an MX or SRV record indicated no SMTP service".
1680 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1681 if the DNS of the sending site is misconfigured. This is quite a
1682 common situation. This change restores the behaviour of treating a
1683 helo verification defer as a failure.
1685 PH/51 If self=fail was set on a router, the bounce message did not include the
1686 actual error message.
1692 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1694 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1695 command itself ended in error, the underlying message about the transport
1696 filter timeout was being overwritten with the pipe command error. Now the
1697 underlying error message should be appended to the second error message.
1699 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1701 PH/02 Reduce the amount of output that "make" produces by default. Full output
1702 can still be requested.
1704 PH/03 The warning log line about a condition test deferring for a "warn" verb
1705 was being output only once per connection, rather than after each
1706 occurrence (because it was using the same function as for successful
1707 "warn" verbs). This seems wrong, so I have changed it.
1709 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1710 it should not have, which might have caused a crash in the right
1711 circumstances, but probably never did.
1713 PH/04 Installed a modified version of Tony Finch's patch to make submission
1714 mode fix the return path as well as the Sender: header line, and to
1715 add a /name= option so that you can make the user's friendly name appear
1718 TF/03 Added the control = fakedefer ACL modifier.
1720 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1721 Mark Lowes for thorough testing.
1723 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1725 TK/03 Merged latest SRS patch from Miles Wilton.
1727 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1728 with the definition in sysexits.h (which is #included earlier).
1729 Fortunately, Exim does not actually use EX_OK. The code used to try to
1730 preserve the sysexits.h value, by assumimg that macro definitions were
1731 scanned for macro replacements. I have been disabused of this notion,
1732 so now the code just undefines EX_OK before #including unistd.h.
1734 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1735 in the smtp transport. When a block could not be written in a single
1736 write() function, the timeout was being re-applied to each part-write.
1737 This seems wrong - if the receiver was accepting one byte at a time it
1738 would take for ever. The timeout is now adjusted when this happens. It
1739 doesn't have to be particularly precise.
1741 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1742 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1744 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1745 without a domain if the check to <postmaster@domain> fails.
1747 SC/01 Eximstats: added -xls and the ability to specify output files
1748 (patch written by Frank Heydlauf).
1750 SC/02 Eximstats: use FileHandles for outputing results.
1752 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1754 SC/04 Eximstats: fixed display of large numbers with -nvr option
1756 SC/05 Eximstats: fixed merging of reports with empty tables.
1758 SC/06 Eximstats: added the -include_original_destination flag
1760 SC/07 Eximstats: removed tabs and trailing whitespace.
1762 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1764 TK/06 MBOX spool code: Add real "From " MBOX separator line
1765 so the .eml file is really in mbox format (even though
1766 most programs do not really care). Patch from Alex Miller.
1768 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1769 The latter is generated from $received_to and is only set if the
1770 message has one envelope recipient. SA can use these headers,
1771 obviously out-of-the-box. Patch from Alex Miller.
1773 PH/08 The ${def test on a variable was returning false if the variable's
1774 value was "0", contrary to what the specification has always said!
1775 The result should be true unless the variable is empty.
1777 PH/09 The syntax error of a character other than { following "${if
1778 def:variable_name" (after optional whitespace) was not being diagnosed.
1779 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1780 accidental colon was present, for example, could give incorrect results.
1782 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1783 result is used (not including appendfile, where other changes are about
1786 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1787 This involved changing a lot of size variables from int to off_t. It
1788 should work with maildirs and everything.
1790 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1791 spamd dying while we are connected to it.
1793 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1796 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1797 function for BDB 4.3.
1799 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1801 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1802 the sources for PCRE have been re-arranged and more files are now
1805 PH/15 The code I had for printing potentially long long variables in PH/11
1806 above was not the best (it lost precision). The length of off_t variables
1807 is now inspected at build time, and an appropriate printing format (%ld
1808 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1809 to be "long long int" or "long int". This is needed for the internal
1810 formatting function string_vformat().
1812 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1813 the configuration file to be ":syslog", then the script "guesses" where
1814 the logs files are, rather than using the compiled in default. In our
1815 case the guess is not the same as the compiled default, so the script
1816 suddenly stopped working when I started to use syslog. The patch checks
1817 to see if log_file_path is "". If so, it attempts to read it from exim
1818 with no configuration file to get the compiled in version, before it
1819 falls back to the previous guessing code."
1821 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1822 implementing BATV in an Exim configuration. See NewStuff for the gory
1825 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1826 Makefile that are specific to HP-UX.
1828 PH/18 If the "use_postmaster" option was set for a recipient callout together
1829 with the "random" option, the postmaster address was used as the MAIL
1830 FROM address for the random test, but not for the subsequent recipient
1831 test. It is now used for both.
1833 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1834 patch removes a few documentation additions to RFC 3028, because the
1835 latest draft now contains them. It adds the new en;ascii-case comparator
1836 and a new error check for 8bit text in MIME parts. Comparator and
1837 require names are now matched exactly. I enabled the subaddress
1838 extension, but it is not well tested yet (read: it works for me)."
1840 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1841 rework some of the code of TK/09 above to avoid the hardwired use of
1842 "%lld" and "long long". Replaced the call to snprintf() with a call to
1845 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1846 records point to non-existent hosts", "retry timeout exceeded", and
1847 "retry time not reached for any host after a long failure period".
1849 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1850 experimental DomainKeys support:
1852 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1853 (2) On an error such as an illegally used "control", the wrong name for
1854 the control was given.
1856 These problems did NOT occur unless DomainKeys support was compiled.
1858 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1860 PH/24 Added ${if match_ip condition.
1862 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1863 databases so that it will be absolutely obvious if a crash occurs in the
1864 DB library. This is a regular occurrence (often caused by mis-matched
1867 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1868 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1869 picked up on a user's system that detects such things. There doesn't seem
1870 to be a gcc warning option for this - only an attribute that has to be
1871 put on the function's prototype. It seems that in Fedora Core 4 they have
1872 set this on a number of new functions. No doubt there will be more in due
1875 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1876 specify a transport. However, if an address that was verified by such a
1877 router was the subject of a callout, Exim crashed because it tried to
1878 read the rcpt_include_affixes from the non-existent transport. Now it
1879 just assumes that the setting of that option is false. This bug was
1880 introduced by 4.51/PH/31.
1882 PH/28 Changed -d+all to exclude +memory, because that information is very
1883 rarely of interest, but it makes the output a lot bigger. People tend to
1884 do -d+all out of habit.
1886 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1887 code in os-type was giving problems when libc.so lives in lib64, like on
1890 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1891 aren't the modern standard, and it seems that some systems' include files
1892 don't always have them. Exim was already checking for some of the newer
1893 ones like T_AAAA, and defining it itself. I've added checks for all the
1894 record types that Exim uses.
1896 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1897 not automatically generating a new one, as it is supposed to. This
1898 prevented TLS from working. If the file did exist, but contained invalid
1899 data, a new version was generated, as expected. It was only the case of a
1900 non-existent file that was broken.
1902 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1903 with a change in libdomainkeys > 0.64.
1905 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1906 from DNS. If the selector record carries the flag, it now has
1907 precedence over the domain-wide flag.
1909 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1911 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1912 the use of a port name that isn't defined in /etc/services) occurred, the
1913 message was deferred as in a normal delivery, and thus remained on the
1914 spool, instead of being failed because of the mua_wrapper setting. This
1915 is now fixed, and I tidied up some of the mua_wrapper messages at the
1918 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1919 the messages in a hash of arrays rather than using individual hashes.
1920 This is a bit cleaner and results in dramatic memory savings, albeit
1921 at a slight CPU cost.
1923 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1924 as requested by Marc Sherman.
1926 SC/10 Eximstats: added histograms for user specified patterns as requested
1929 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1931 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1932 fopen() in the content-scanning modules that did not already have it.
1938 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1939 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1941 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1943 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1945 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1946 to test Sieve filters that use "vacation".
1948 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1949 that changes the way the GnuTLS parameters are stored in the cache file.
1950 The new format can be generated externally. For backward compatibility,
1951 if the data in the cache doesn't make sense, Exim assumes it has read an
1952 old-format file, and it generates new data and writes a new file. This
1953 means that you can't go back to an older release without removing the
1956 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1957 work if there are any delivery delays because "one_time" forces the
1958 parent to be marked "delivered", so its unseen clone is never tried
1959 again. For this reason, Exim now forbids the simultaneous setting of
1962 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1963 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1964 entry if you want to know the details. The fix, however, neglected to
1965 consider the case when local delivery batching is involved. The test for
1966 "previously delivered" was not happening when checking to see if an
1967 address could be batched with a previous (undelivered) one; under
1968 certain circumstances this could lead to multiple deliveries to the same
1971 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1972 in its include files, and this causes problems building Exim.
1974 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1975 header_syntax) but Exim was just ignoring anything given after a slash.
1976 In particular, this caused confusion with an attempt to use "verify =
1977 reverse_host_lookup/defer_ok". An error is now given when options are
1978 supplied for verify items that do not have them. (Maybe reverse_host_
1979 lookup should have a defer_ok option, but that's a different point.)
1981 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1982 defined by RFC 821) to 2048, because there were problems with some AUTH
1983 commands, and RFC 1869 says the size should be increased for extended
1984 SMTP commands that take arguments.
1986 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1989 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1990 "unknown" error; now it says that the functionality isn't in the binary.
1992 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1993 an address' error message when a string expansion fails (syntax or
1994 whatever). Otherwise the password may appear in the log. Following change
1995 PH/42 below, there is no longer a chance of it appearing in a bounce
1998 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2000 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2001 of its addresses was ever tried. (Bugzilla bug #2.)
2003 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2004 the result incorrectly in the debug output. (It correctly added a newline
2005 to what was transported.)
2007 TF/01 Added $received_time.
2009 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2010 commented out examples of how to interface to a virus scanner and to
2011 SpamAssassin. Also added commented examples of av_scanner and
2012 spamd_address settings.
2014 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2015 and controls are allowed in which ACLs. There were a couple of minor
2016 errors. Some of the entries in the conditions table (which is a table of
2017 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2018 negation of where the condition IS allowed.
2020 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2022 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2023 header file does not have a version number, so I've had to invent a new
2024 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2025 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2026 radiusclient), but it was contributed by a Radius user.
2028 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2029 files or directories, for OpenSSL.
2031 PH/19 When an Exim process that is running as root has to create an Exim log
2032 file, it does so in a subprocess that runs as exim:exim so as to get the
2033 ownership right at creation (otherwise, other Exim processes might see
2034 the file with the wrong ownership). There was no test for failure of this
2035 fork() call, which would lead to the process getting stuck as it waited
2036 for a non-existent subprocess. Forks do occasionally fail when resources
2037 run out. I reviewed all the other calls to fork(); they all seem to check
2040 PH/20 When checking for unexpected SMTP input at connect time (before writing
2041 the banner), Exim was not dealing correctly with a non-positive return
2042 from the read() function. If the client had disconnected by this time,
2043 the result was a log entry for a synchronization error with an empty
2044 string after "input=" when read() returned zero. If read() returned -1
2045 (an event I could not check), uninitialized data bytes were printed.
2046 There were reports of junk text (parts of files, etc) appearing after
2049 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2051 PH/22 Added support for macro redefinition, and (re)definition in between
2052 driver and ACL definitions.
2054 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2055 forgetting to use the resulting value; it was using the unexpanded value.
2057 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2058 hadn't been configured. The fix is from Juergen Kreileder, who
2059 understands it better than I do:
2061 "Here's what I see happening with three configured cyrus_sasl
2062 authenticators configured (plain, login, cram-md5):
2064 On startup auth_cyrus_sasl_init() gets called for each of these.
2065 This means three calls to sasl_listmech() without a specified mech_list.
2066 => SASL tests which mechs of all available mechs actually work
2067 => three warnings about OTP not working
2068 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2070 With the patch, sasl_listmech() also gets called three times. But now
2071 SASL's mech_list option is set to the server_mech specified in the the
2072 authenticator. Or in other words, the answer from sasl_listmech()
2073 gets limited to just the mech you're testing for (which is different
2075 => the return list contains just 'plain' or 'login', 'cram-md5' or
2076 nothing depending on the value of ob->server_mech.
2078 I've just tested the patch: Authentication still works fine,
2079 unavailable mechs specified in the exim configuration are still
2080 caught, and the auth.log warnings about OTP are gone."
2082 PH/25 When debugging is enabled, the contents of the command line are added
2083 to the debugging output, even when log_selector=+arguments is not
2086 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2087 answer is "GNU", and only if the return is "GNU/something" is the answer
2090 PH/27 $acl_verify_message is now set immediately after the failure of a
2091 verification in an ACL, and so is available in subsequent modifiers. In
2092 particular, the message can be preserved by coding like this:
2094 warn !verify = sender
2095 set acl_m0 = $acl_verify_message
2097 Previously, $acl_verify_message was set only while expanding "message"
2098 and "log_message" when a very denied access.
2100 PH/28 Modified OS/os.c-Linux with
2102 -#ifndef OS_LOAD_AVERAGE
2103 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2105 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2106 nomenclature these days.)
2108 PH/29 Installed patch from the Sieve maintainer that adds the options
2109 sieve_useraddress and sieve_subaddress to the redirect router.
2111 PH/30 In these circumstances:
2112 . Two addresses routed to the same list of hosts;
2113 . First host does not offer TLS;
2114 . First host accepts first address;
2115 . First host gives temporary error to second address;
2116 . Second host offers TLS and a TLS session is established;
2117 . Second host accepts second address.
2118 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2119 and peerdn, if requested) that were in fact used only for the second
2122 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2123 attention to any local part prefix or suffix that was matched by the
2124 router that accepted the address. It now behaves in the same way as it
2125 does for delivery: the affixes are removed from the local part unless
2126 rcpt_include_affixes is set on the transport.
2128 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2129 timeout during the DATA phase of an incoming message.
2131 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2132 applied a patch sanctioned by the Sieve maintainer.
2134 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2135 the uid or gid is negative. A case of a negative gid caused this to be
2136 noticed. The fix allows for either to be negative.
2138 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2139 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2142 PH/36 The change PH/12 above was broken. Fixed it.
2144 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2145 the grounds that routing the same address twice would always produce the
2146 same answer. This might have been true once, but it is certainly no
2147 longer true now. Routing a child address may depend on the previous
2148 routing that produced that child. Some complicated redirection strategies
2149 went wrong when messages had multiple recipients, and made Exim's
2150 behaviour dependent on the order in which the addresses were given.
2152 I have moved the duplicate checking until after the routing is complete.
2153 Exim scans the addresses that are assigned to local and remote
2154 transports, and removes any duplicates. This means that more work will be
2155 done, as duplicates will always all be routed, but duplicates are
2156 presumably rare, so I don't expect this is of any significance.
2158 For deliveries to pipes, files, and autoreplies, the duplicate checking
2159 still happens during the routing process, since they are not going to be
2162 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2163 It corrects a timeout issue with spamd. This is Ian's comment: "The
2164 background is that sometimes spamd either never reads data from a
2165 connection it has accepted, or it never writes response data. The exiscan
2166 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2167 blindly assumes that writes won't block so it may never time out."
2169 PH/39 Allow G after quota size as well as K and M.
2171 PH/40 The value set for $authenticated_id in an authenticator may not contain
2172 binary zeroes or newlines because the value is written to log lines and
2173 to spool files. There was no check on this. Now the value is run through
2174 the string_printing() function so that such characters are converted to
2175 printable escape sequences.
2177 PH/41 $message_linecount is a new variable that contains the total number of
2178 lines in the message. Compare $body_linecount, which is the count for the
2181 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2182 bounce and delay warning messages, except in certain special cases, which
2185 (a) An SMTP error message from a remote host;
2186 (b) A message specified in a :fail: redirection;
2187 (c) A message specified in a "fail" command in a system filter;
2188 (d) A message specified in a FAIL return from the queryprogram router;
2189 (e) A message specified by the cannot_route_message router option.
2191 In these cases only, Exim does include the error details in bounce and
2192 warning messages. There are also a few cases where bland messages such
2193 as "unrouteable address" or "local delivery error" are given.
2195 PH/43 $value is now also set for the "else" part of a ${run expansion.
2197 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2198 being worked on, but at least Exim now implements the latest version to
2201 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2202 process to complete was treated as a delivery failure, a timeout while
2203 writing the message to the pipe was logged, but erroneously treated as a
2204 successful delivery. Such timeouts include transport filter timeouts. For
2205 consistency with the overall process timeout, these timeouts are now
2206 treated as errors, giving rise to delivery failures by default. However,
2207 there is now a new Boolean option for the pipe transport called
2208 timeout_defer, which, if set TRUE, converts the failures into defers for
2209 both kinds of timeout. A transport filter timeout is now identified in
2212 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2213 systems where "make" and "gmake" are different, calling "gmake" at top
2214 level broke things. I've arranged for the value of $(MAKE) to be passed
2215 from the Makefile to this script so that it can call the same version of
2219 A note about Exim versions 4.44 and 4.50
2220 ----------------------------------------
2222 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2223 changes of various kinds. As a consequence, a big documentation update was
2224 needed. This delayed the release for rather longer than seemed good, especially
2225 in the light of a couple of (minor) security issues. Therefore, the changes
2226 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2227 release. So 4.44 and 4.50 are in effect two different branches that both start
2230 I have left the 4.50 change log unchanged; it contains all the changes since
2231 4.43. The change log for 4.44 is below; many of its items are identical to
2232 those for 4.50. This seems to be the most sensible way to preserve the
2233 historical information.
2239 1. Minor wording change to the doc/README.SIEVE file.
2241 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2242 computation of the current number of files was incorrect.
2244 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2245 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2248 4. Give more explanation in the error message when the command for a transport
2249 filter fails to execute.
2251 5. There are several places where Exim runs a non-Exim command in a
2252 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2253 was being done only for the command run by the queryprogram router. It is
2254 now done for all such subprocesses. The other cases are: ${run, transport
2255 filters, and the commands run by the lmtp and pipe transports.
2257 6. Added CONFIGURE_GROUP build-time option.
2259 7. Some older OS have a limit of 256 on the maximum number of file
2260 descriptors. Exim was using setrlimit() to set 1000 as a large value
2261 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2262 systems. I've change it so that if it can't get 1000, it tries for 256.
2264 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2265 was an oversight, and furthermore, ever since the addition of extra
2266 controls (e.g. 4.43/32), the checks on when to allow different forms of
2267 "control" were broken. There should now be diagnostics for all cases when a
2268 control that does not make sense is encountered.
2270 9. Added the /retain_sender option to "control=submission".
2272 10. $recipients is now available in the predata ACL (oversight).
2274 11. Tidy the search cache before the fork to do a delivery from a message
2275 received from the command line. Otherwise the child will trigger a lookup
2276 failure and thereby defer the delivery if it tries to use (for example) a
2277 cached ldap connection that the parent has called unbind on.
2279 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2280 of $address_data from the recipient verification was clobbered by the
2281 sender verification.
2283 13. The value of address_data from a sender verification is now available in
2284 $sender_address_data in subsequent conditions in the ACL statement.
2286 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2288 15. Added a new option "connect=<time>" to callout options, to set a different
2291 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2292 was its contents. (It was OK if the option was not defined at all.)
2294 17. A "Completed" log line is now written for messages that are removed from
2295 the spool by the -Mrm option.
2297 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2298 information about exactly what failed.
2300 19. Added -dd to debug only the daemon process.
2302 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2303 handles timeouts, both on the server side and network timeouts. Renamed the
2304 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2306 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2307 It is now set to "smtps".
2309 22. $host_address is now set to the target address during the checking of
2310 ignore_target_hosts.
2312 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2313 being passed; this would have caused $sender_host_name to have been used if
2314 matching the list had actually called for a host name (not very likely,
2315 since this list is usually IP addresses). A host name is now passed as
2318 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2319 code that specifies a non-restarting handler (typically sigaction() in
2320 modern systems) in an attempt to fix a rare and obscure crash bug.
2322 25. Narrowed the window for a race in the daemon that could cause it to ignore
2323 SIGCHLD signals. This is not a major problem, because they are used only to
2324 wake it up if nothing else does.
2326 26. A malformed maildirsize file could cause Exim to calculate negative values
2327 for the mailbox size or file count. Odd effects could occur as a result.
2328 The maildirsize information is now recalculated if the size or filecount
2331 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2332 support for a long time. Removed HAVE_SYS_VFS_H.
2334 28. Installed the latest version of exipick from John Jetmore.
2336 29. In an address list, if the pattern was not a regular expression, an empty
2337 subject address (from a bounce message) matched only if the pattern was an
2338 empty string. Non-empty patterns were not even tested. This was the wrong
2339 because it is perfectly reasonable to use an empty address as part of a
2340 database query. An empty address is now tested by patterns that are
2341 lookups. However, all the other forms of pattern expect the subject to
2342 contain a local part and a domain, and therefore, for them, an empty
2343 address still always fails if the pattern is not itself empty.
2345 30. Exim went into a mad DNS loop when attempting to do a callout where the
2346 host was specified on an smtp transport, and looking it up yielded more
2347 than one IP address.
2349 31. Re-factored the code for checking spool and log partition space into a
2350 function that finds that data and another that does the check. The former
2351 is then used to implement four new variables: $spool_space, $log_space,
2352 $spool_inodes, and $log_inodes.
2354 32. The RFC2047 encoding function was originally intended for short strings
2355 such as real names; it was not keeping to the 75-character limit for
2356 encoded words that the RFC imposes. It now respects the limit, and
2357 generates multiple encoded words if necessary. To be on the safe side, I
2358 have increased the buffer size for the ${rfc2047: expansion operator from
2361 33. It is now permitted to omit both strings after an "if" condition; if the
2362 condition is true, the result is "true". As before, when the second string
2363 is omitted, a false condition yields an empty string. This makes it less
2364 cumbersome to write custom ACL and router conditions.
2366 34. Failure to deliver a bounce message always caused it to be frozen, even if
2367 there was an errors_to setting on the router. The errors_to setting is now
2370 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2371 canonical form (fully expanded) before being placed in
2372 $sender_host_address.
2374 36. The table in the code that translates DNS record types into text (T_A to
2375 "A" for instance) was missing entries for NS and CNAME. It is just possible
2376 that this could have caused confusion if both these types were looked up
2377 for the same domain, because the text type is used as part of Exim's
2378 per-process caching. But the chance of anyone hitting this buglet seems
2381 37. The dnsdb lookup has been extended in a number of ways.
2383 (1) There is a new type, "zns", which walks up the domain tree until it
2384 finds some nameserver records. It should be used with care.
2386 (2) There is a new type, "mxh", which is like "mx" except that it returns
2387 just the host names, not the priorities.
2389 (3) It is now possible to give a list of domains (or IP addresses) to be
2390 looked up. The behaviour when one of the lookups defers can be
2391 controlled by a keyword.
2393 (4) It is now possible to specify the separator character for use when
2394 multiple records are returned.
2396 38. The dnslists ACL condition has been extended: it is now possible to supply
2397 a list of IP addresses and/or domains to be looked up in a particular DNS
2400 39. Added log_selector=+queue_time_overall.
2402 40. When running the queue in the test harness, wait just a tad after forking a
2403 delivery process, to get repeatability of debugging output.
2405 41. Include certificate and key file names in error message when GnuTLS fails
2406 to set them up, because the GnuTLS error message doesn't include the name
2407 of the failing file when there is a problem reading it.
2409 42. Allow both -bf and -bF in the same test run.
2411 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2413 44. The "Exiscan patch" is now merged into the mainline Exim source.
2415 45. Sometimes the final signoff response after QUIT could fail to get
2416 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2417 < 0 before doing a fflush(). This bug looks as though it goes back to the
2418 introduction of TLS in release 3.20, but "sometimes" must have been rare
2419 because the tests only now provoked it.
2421 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2422 (this can affect the format of dates).
2424 47. exim_tidydb, when checking for the continued existence of a message for
2425 which it has found a message-specific retry record, was not finding
2426 messages that were in split spool directories. Consequently, it was
2427 deleting retry records that should have stayed in existence.
2429 48. Steve fixed some bugs in eximstats.
2431 49. The SPA authentication driver was not abandoning authentication and moving
2432 on to the next authenticator when an expansion was forced to fail,
2433 contradicting the general specification for all authenticators. Instead it
2434 was generating a temporary error. It now behaves as specified.
2436 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2437 (the order specifies the preference for clients). The order is now AES256,
2438 AES128, 3DES, ARCFOUR128.
2440 51. Small patch to Sieve code - explicitly set From: when generating an
2443 52. Exim crashed if a remote delivery caused a very long error message to be
2444 recorded - for instance if somebody sent an entire SpamAssassin report back
2445 as a large number of 550 error lines. This bug was coincidentally fixed by
2446 increasing the size of one of Exim's internal buffers (big_buffer) that
2447 happened as part of the Exiscan merge. However, to be on the safe side, I
2448 have made the code more robust (and fixed the comments that describe what
2451 53. Now that there can be additional text after "Completed" in log lines (if
2452 the queue_time_overall log selector is set), a one-byte patch to exigrep
2453 was needed to allow it to recognize "Completed" as not the last thing in
2456 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2457 patch that reportedly fixes this has been added. I am not expert enough to
2458 create a test for it. This is what the patch creator wrote:
2460 "I found a little strange behaviour of ldap code when working with
2461 Windows 2003 AD Domain, where users was placed in more than one
2462 Organization Units. When I tried to give exim partial DN, the exit code
2463 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2464 But simultaneously result of request was absolutely normal ldap result,
2465 so I produce this patch..."
2467 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2468 REFERENCE, so I have modified the code to exclude the patch when that macro
2471 55. Some experimental protocols are using DNS PTR records for new purposes. The
2472 keys for these records are domain names, not reversed IP addresses. The
2473 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2474 leaves it alone. Component reversal etc. now happens only for IP addresses.
2477 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2479 57. Double the size of the debug message buffer (to 2048) so that more of very
2480 long debug lines gets shown.
2482 58. The exicyclog utility now does better if the number of log files to keep
2483 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2485 59. Two changes related to the smtp_active_hostname option:
2487 (1) $smtp_active_hostname is now available as a variable.
2488 (2) The default for smtp_banner uses $smtp_active_hostname instead
2489 of $primary_hostname.
2491 60. The host_aton() function is supposed to be passed a string that is known
2492 to be a valid IP address. However, in the case of IPv6 addresses, it was
2493 not checking this. This is a hostage to fortune. Exim now panics and dies
2494 if the condition is not met. A case was found where this could be provoked
2495 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2496 components; fortuitously, this particular loophole had already been fixed
2497 by change 4.50/55 above.
2499 If there are any other similar loopholes, the new check in host_aton()
2500 itself should stop them being exploited. The report I received stated that
2501 data on the command line could provoke the exploit when Exim was running as
2502 exim, but did not say which command line option was involved. All I could
2503 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2504 running as the user.
2507 61. There was a buffer overflow vulnerability in the SPA authentication code
2508 (which came originally from the Samba project). I have added a test to the
2509 spa_base64_to_bits() function which I hope fixes it.
2512 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2513 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2515 63. The daemon start-up calls getloadavg() while still root for those OS that
2516 need the first call to be done as root, but it missed one case: when
2517 deliver_queue_load_max is set with deliver_drop_privilege. This is
2518 necessary for the benefit of the queue runner, because there is no re-exec
2519 when deliver_drop_privilege is set.
2521 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2522 This has been fixed.
2524 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2525 was in use, was not putting the data itself into the right store pool;
2526 consequently, it could be overwritten for a subsequent message in the same
2527 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2530 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2532 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2533 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2534 the function were treating the return as a boolean value, which happened to
2535 work because 0=false and not-0=true, but is not correct code.
2537 68. The host_aton() function was not handling scoped IPv6 addresses (those
2538 with, for example, "%eth0" on the end) correctly.
2540 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2541 negated items (that is, ~something) in unsigned ints. Some compilers
2542 apparently mutter when there is no cast.
2544 70. If an address verification called from an ACL failed, and did not produce a
2545 user-specific message (i.e. there was only a "system" message), nothing was
2546 put in $acl_verify_message. In this situation, it now puts the system
2549 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2550 session; change 4.31/43 added the unwanted input to the log line - except
2551 that it did not do this in the start of session case. It now does.
2553 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2554 This is wrong and can cause the other end to generate a synchronization
2555 error if it is another Exim or anything else that does the synchronization
2556 check. A QUIT command is no longer sent after a timeout.
2558 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2559 during host lookups.
2561 74. The defer_ok option of callout verification was not working if it was used
2562 when verifying addresses in header lines, that is, for this case:
2564 verify = header_sender/callout=defer_ok
2566 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2567 those file descriptors could be used for SMTP connections. If anything
2568 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2569 could be sent to the SMTP client, causing chaos. The daemon now opens
2570 stdin, stdout, and stderr to /dev/null when it puts itself into the
2573 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2574 log by default. The user can override this with suitable Perl magic.
2576 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2577 the log message when discard triggers, was not working for the DATA ACL or
2578 for the non-SMTP ACL.
2580 78. Error message wording change in sieve.c.
2582 79. If smtp_accept_max_per_host was set, the number of connections could be
2583 restricted to fewer than expected, because the daemon was trying to set up
2584 a new connection before checking whether the processes handling previous
2585 connections had finished. The check for completed processes is now done
2586 earlier. On busy systems, this bug wouldn't be noticed because something
2587 else would have woken the daemon, and it would have reaped the completed
2590 80. If a message was submitted locally by a user whose login name contained one
2591 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2592 It caused a spool format error. I have fixed the spool reading code. A
2593 related problem was that the "from" clause in the Received: line became
2594 illegal because of the space(s). It is now covered by ${quote_local_part.
2596 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2599 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2601 83. Patch from Sieve maintainer to fix unterminated string problem in
2602 "vacation" handling.
2604 84. Some minor changes to the Linux configuration files to help with other
2605 OS variants using glibc.
2607 85. One more patch for Sieve to update vacation handling to latest spec.
2610 ----------------------------------------------------
2611 See the note above about the 4.44 and 4.50 releases.
2612 ----------------------------------------------------
2618 1. Change 4.43/35 introduced a bug that caused file counts to be
2619 incorrectly computed when quota_filecount was set in an appendfile
2622 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2623 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2626 3. Give more explanation in the error message when the command for a transport
2627 filter fails to execute.
2629 4. There are several places where Exim runs a non-Exim command in a
2630 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2631 was being done only for the command run by the queryprogram router. It is
2632 now done for all such subprocesses. The other cases are: ${run, transport
2633 filters, and the commands run by the lmtp and pipe transports.
2635 5. Some older OS have a limit of 256 on the maximum number of file
2636 descriptors. Exim was using setrlimit() to set 1000 as a large value
2637 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2638 systems. I've change it so that if it can't get 1000, it tries for 256.
2640 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2641 was an oversight, and furthermore, ever since the addition of extra
2642 controls (e.g. 4.43/32), the checks on when to allow different forms of
2643 "control" were broken. There should now be diagnostics for all cases when a
2644 control that does not make sense is encountered.
2646 7. $recipients is now available in the predata ACL (oversight).
2648 8. Tidy the search cache before the fork to do a delivery from a message
2649 received from the command line. Otherwise the child will trigger a lookup
2650 failure and thereby defer the delivery if it tries to use (for example) a
2651 cached ldap connection that the parent has called unbind on.
2653 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2654 of $address_data from the recipient verification was clobbered by the
2655 sender verification.
2657 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2658 was its contents. (It was OK if the option was not defined at all.)
2660 11. A "Completed" log line is now written for messages that are removed from
2661 the spool by the -Mrm option.
2663 12. $host_address is now set to the target address during the checking of
2664 ignore_target_hosts.
2666 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2667 being passed; this would have caused $sender_host_name to have been used if
2668 matching the list had actually called for a host name (not very likely,
2669 since this list is usually IP addresses). A host name is now passed as
2672 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2673 code that specifies a non-restarting handler (typically sigaction() in
2674 modern systems) in an attempt to fix a rare and obscure crash bug.
2676 15. Narrowed the window for a race in the daemon that could cause it to ignore
2677 SIGCHLD signals. This is not a major problem, because they are used only to
2678 wake it up if nothing else does.
2680 16. A malformed maildirsize file could cause Exim to calculate negative values
2681 for the mailbox size or file count. Odd effects could occur as a result.
2682 The maildirsize information is now recalculated if the size or filecount
2685 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2686 support for a long time. Removed HAVE_SYS_VFS_H.
2688 18. Updated exipick to current release from John Jetmore.
2690 19. Allow an empty sender to be matched against a lookup in an address list.
2691 Previously the only cases considered were a regular expression, or an
2694 20. Exim went into a mad DNS lookup loop when doing a callout where the
2695 host was specified on the transport, if the DNS lookup yielded more than
2698 21. The RFC2047 encoding function was originally intended for short strings
2699 such as real names; it was not keeping to the 75-character limit for
2700 encoded words that the RFC imposes. It now respects the limit, and
2701 generates multiple encoded words if necessary. To be on the safe side, I
2702 have increased the buffer size for the ${rfc2047: expansion operator from
2705 22. Failure to deliver a bounce message always caused it to be frozen, even if
2706 there was an errors_to setting on the router. The errors_to setting is now
2709 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2710 canonical form (fully expanded) before being placed in
2711 $sender_host_address.
2713 24. Updated eximstats to version 1.33
2715 25. Include certificate and key file names in error message when GnuTLS fails
2716 to set them up, because the GnuTLS error message doesn't include the name
2717 of the failing file when there is a problem reading it.
2719 26. Expand error message when OpenSSL has problems setting up cert/key files.
2722 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2723 (this can affect the format of dates).
2725 28. exim_tidydb, when checking for the continued existence of a message for
2726 which it has found a message-specific retry record, was not finding
2727 messages that were in split spool directories. Consequently, it was
2728 deleting retry records that should have stayed in existence.
2730 29. eximstats updated to version 1.35
2731 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2732 1.35 - bugfix such that pie charts by volume are generated correctly
2734 30. The SPA authentication driver was not abandoning authentication and moving
2735 on to the next authenticator when an expansion was forced to fail,
2736 contradicting the general specification for all authenticators. Instead it
2737 was generating a temporary error. It now behaves as specified.
2739 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2740 (the order specifies the preference for clients). The order is now AES256,
2741 AES128, 3DES, ARCFOUR128.
2743 31. Small patch to Sieve code - explicitly set From: when generating an
2746 32. Exim crashed if a remote delivery caused a very long error message to be
2747 recorded - for instance if somebody sent an entire SpamAssassin report back
2748 as a large number of 550 error lines. This bug was coincidentally fixed by
2749 increasing the size of one of Exim's internal buffers (big_buffer) that
2750 happened as part of the Exiscan merge. However, to be on the safe side, I
2751 have made the code more robust (and fixed the comments that describe what
2754 33. Some experimental protocols are using DNS PTR records for new purposes. The
2755 keys for these records are domain names, not reversed IP addresses. The
2756 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2757 leaves it alone. Component reversal etc. now happens only for IP addresses.
2760 34. The host_aton() function is supposed to be passed a string that is known
2761 to be a valid IP address. However, in the case of IPv6 addresses, it was
2762 not checking this. This is a hostage to fortune. Exim now panics and dies
2763 if the condition is not met. A case was found where this could be provoked
2764 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2765 components; fortuitously, this particular loophole had already been fixed
2766 by change 4.50/55 or 4.44/33 above.
2768 If there are any other similar loopholes, the new check in host_aton()
2769 itself should stop them being exploited. The report I received stated that
2770 data on the command line could provoke the exploit when Exim was running as
2771 exim, but did not say which command line option was involved. All I could
2772 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2773 running as the user.
2776 35. There was a buffer overflow vulnerability in the SPA authentication code
2777 (which came originally from the Samba project). I have added a test to the
2778 spa_base64_to_bits() function which I hope fixes it.
2781 36. The daemon start-up calls getloadavg() while still root for those OS that
2782 need the first call to be done as root, but it missed one case: when
2783 deliver_queue_load_max is set with deliver_drop_privilege. This is
2784 necessary for the benefit of the queue runner, because there is no re-exec
2785 when deliver_drop_privilege is set.
2787 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2788 was in use, was not putting the data itself into the right store pool;
2789 consequently, it could be overwritten for a subsequent message in the same
2790 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2793 38. Sometimes the final signoff response after QUIT could fail to get
2794 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2795 < 0 before doing a fflush(). This bug looks as though it goes back to the
2796 introduction of TLS in release 3.20, but "sometimes" must have been rare
2797 because the tests only now provoked it.
2803 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2804 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2805 Now it returns an integer. A number of calls were still expecting a T/F
2806 return. Fortuitously, in all cases, the tests worked in OK situations,
2807 which is the norm. However, things would have gone wrong on any write
2808 failures on the smtp file descriptor. This function is used when sending
2809 messages over SMTP and also when doing verify callouts.
2811 2. When Exim is called to do synchronous delivery of a locally submitted
2812 message (the -odf or -odi options), it no longer closes stderr before doing
2815 3. Implemented the mua_wrapper option.
2817 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2819 5. Implemented the functions header_remove(), header_testname(),
2820 header_add_at_position(), and receive_remove_recipient(), and exported them
2823 6. If an ACL "warn" statement specified the addition of headers, Exim already
2824 inserted X-ACL-Warn: at the start if there was no header name. However, it
2825 was not making this test for the second and subsequent header lines if
2826 there were newlines in the string. This meant that an invalid header could
2827 be inserted if Exim was badly configured.
2829 7. Allow an ACL "warn" statement to add header lines at the start or after all
2830 the Received: headers, as well as at the end.
2832 8. Added the rcpt_4xx retry error code.
2834 9. Added postmaster_mailfrom=xxx to callout verification option.
2836 10. Added mailfrom=xxxx to the callout verification option, for verify=
2839 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2840 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2842 12. Inserted some casts to stop certain compilers warning when using pointer
2843 differences as field lengths or precisions in printf-type calls (mostly
2844 affecting debugging statements).
2846 13. Added optional readline() support for -be (dynamically loaded).
2848 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2849 same clock tick as a message's arrival, so that its received time was the
2850 same as the "first fail" time on the retry record, and that message
2851 remained on the queue past the ultimate address timeout, every queue runner
2852 would try a delivery (because it was past the ultimate address timeout) but
2853 after another failure, the ultimate address timeout, which should have then
2854 bounced the address, did not kick in. This was a "< instead of <=" error;
2855 in most cases the first failure would have been in the next clock tick
2856 after the received time, and all would be well.
2858 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2859 being recognized when the domain list was tested by the match_domain
2860 condition in an expansion string.
2862 16. Added the ${str2b64: operator.
2864 17. Exim was always calling setrlimit() to set a large limit for the number of
2865 processes, without checking whether the existing limit was already
2866 adequate. (It did check for the limit on file descriptors.) Furthermore,
2867 errors from getrlimit() and setrlimit() were being ignored. Now they are
2868 logged to the main and panic logs, but Exim does carry on, to try to do its
2869 job under whatever limits there are.
2871 18. Imported PCRE 5.0.
2873 19. Trivial typo in log message " temporarily refused connection" (the leading
2876 20. If the log selector return_path_on_delivery was set and an address was
2877 redirected to /dev/null, the delivery process crashed because it assumed
2878 that a return path would always be set for a "successful" delivery. In this
2879 case, the whole delivery is bypassed as an optimization, and therefore no
2882 21. Internal re-arrangement: the function for sending a challenge and reading
2883 a response while authentication was assuming a zero-terminated challenge
2884 string. It's now changed to take a pointer and a length, to allow for
2885 binary data in such strings.
2887 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2889 23. Exim was not respecting finduser_retries when seeking the login of the
2890 uid under which it was called; it was always trying 10 times. (The default
2891 setting of finduser_retries is zero.) Also, it was sleeping after the final
2892 failure, which is pointless.
2894 24. Implemented tls_on_connect_ports.
2896 25. Implemented acl_smtp_predata.
2898 26. If the domain in control=submission is set empty, Exim assumes that the
2899 authenticated id is a complete email address when it generates From: or
2900 Sender: header lines.
2902 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2903 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2904 chown and chgrp in /bin and hostname in /usr/bin.
2906 28. Exim was keeping the "process log" file open after each use, just as it
2907 does for the main log. This opens the possibility of it remaining open for
2908 long periods when the USR1 signal hits a daemon. Occasional processlog
2909 errors were reported, that could have been caused by this. Anyway, it seems
2910 much more sensible not to leave this file open at all, so that is what now
2913 29. The long-running daemon process does not normally write to the log once it
2914 has entered its main loop, and it closes the log before doing so. This is
2915 so that log files can straightforwardly be renamed and moved. However,
2916 there are a couple of unusual error situations where the daemon does write
2917 log entries, and I had neglected to close the log afterwards.
2919 30. The text of an SMTP error response that was received during a remote
2920 delivery was being truncated at 512 bytes. This is too short for some of
2921 the long messages that one sometimes sees. I've increased the limit to
2924 31. It is now possible to make retry rules that apply only when a message has a
2925 specific sender, in particular, an empty sender.
2927 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2928 it possible to be selective about when SMTP synchronization is enforced.
2930 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2932 32. Implemented hosts_connection_nolog.
2934 33. Added an ACL for QUIT.
2936 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2939 35. Added mailbox_size and mailbox_filecount to appendfile.
2941 36. Added control = no_multiline_responses to ACLs.
2943 37. There was a bug in the logic of the code that waits for the clock to tick
2944 in the case where the clock went backwards by a substantial amount such
2945 that the microsecond fraction of "now" was more than the microsecond
2946 fraction of "then" (but the whole seconds number was less).
2948 38. Added support for the libradius Radius client library this is found on
2949 FreeBSD (previously only the radiusclient library was supported).
2955 1. When certain lookups returned multiple values in the form name=value, the
2956 quoting of the values was not always being done properly. Specifically:
2957 (a) If the value started with a double quote, but contained no whitespace,
2959 (b) If the value contained whitespace other than a space character (i.e.
2960 tabs or newlines or carriage returns) it was not quoted.
2961 This fix has been applied to the mysql and pgsql lookups by writing a
2962 separate quoting function and calling it from the lookup code. The fix
2963 should probably also be applied to nisplus, ibase and oracle lookups, but
2964 since I cannot test any of those, I have not disturbed their existing code.
2966 2. A hit in the callout cache for a specific address caused a log line with no
2967 reason for rejecting RCPT. Now it says "Previous (cached) callout
2968 verification failure".
2970 3. There was an off-by-one bug in the queryprogram router. An over-long
2971 return line was truncated at 256 instead of 255 characters, thereby
2972 overflowing its buffer with the terminating zero. As well as fixing this, I
2973 have increased the buffer size to 1024 (and made a note to document this).
2975 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2976 when Exim is waiting for an SMTP response from a remote server, Exim
2977 restarts its select() call on the socket, thereby resetting its timeout.
2978 This is not a problem when such interrupts are rare. Somebody set up a cron
2979 job to run exiwhat every 2 minutes, which is less than the normal select()
2980 timeout (5 or 10 minutes). This meant that the select() timeout never
2981 kicked in because it was always reset. I have fixed this by comparing the
2982 time when an interrupt arrives with the time at the start of the first call
2983 to select(). If more time than the timeout has elapsed, the interrupt is
2984 treated as a timeout.
2986 5. Some internal re-factoring in preparation for the addition of Sieve
2987 extensions (by MH). In particular, the "personal" test is moved to a
2988 separate function, and given an option for scanning Cc: and Bcc: (which is
2989 not set for Exim filters).
2991 6. When Exim created an email address using the login of the caller as the
2992 local part (e.g. when creating a From: or Sender: header line), it was not
2993 quoting the local part when it contained special characters such as @.
2995 7. Installed new OpenBSD configuration files.
2997 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2998 try to make them clearer.
3000 9. Callout options, other than the timeout value, were being ignored when
3001 verifying sender addresses in header lines. For example, when using
3003 verify = header_sender/callout=no_cache
3005 the cache was (incorrectly) being used.
3007 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3008 only the Cygwin environment.
3010 11. When return_path_on_delivery was set as a log selector, if different remote
3011 addresses in the same message used different return paths and parallel
3012 remote delivery occurred, the wrong values would sometimes be logged.
3013 (Whenever a remote delivery process finished, the return path value from
3014 the most recently started remote delivery process was logged.)
3016 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3017 lines when AUTH and/or TLS are in use. This is the "received protocol"
3018 field. Exim used to use "asmtp" for authenticated SMTP, without any
3019 indication (in the protocol name) for TLS use. Now it follows the RFC and
3020 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3021 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3022 names appear in log lines as well as in Received: header lines.
3024 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3025 extensions, and comparison tests, and to fix some bugs.
3027 14. Changes to the "personal" filter test:
3029 (1) The test was buggy in that it was just doing the equivalent of
3030 "contains" tests on header lines. For example, if a user's address was
3031 anne@some.where, the "personal" test would incorrectly be true for
3033 To: susanne@some.where
3035 This test is now done by extracting each address from the header in turn,
3036 and checking the entire address. Other tests that are part of "personal"
3037 are now done using regular expressions (for example, to check local parts
3038 of addresses in From: header lines).
3040 (2) The list of non-personal local parts in From: addresses has been
3041 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3042 taken from the Sieve specification recommendations.
3044 (3) If the message contains any header line starting with "List-" it is
3045 treated as non-personal.
3047 (4) The test for "circular" in the Subject: header line has been removed
3048 because it now seems ill-conceived.
3050 15. Minor typos in src/EDITME comments corrected.
3052 16. Installed latest exipick from John Jetmore.
3054 17. If headers_add on a router specified a text string that was too long for
3055 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3056 of string_sprintf() is now avoided.
3058 18. $message_body_size was not set (it was always zero) when running the DATA
3059 ACL and the local_scan() function.
3061 19. For the "mail" command in an Exim filter, no default was being set for
3062 the once_repeat time, causing a random time value to be used if "once" was
3063 specified. (If the value happened to be <= 0, no repeat happened.) The
3064 default is now 0s, meaning "never repeat". The "vacation" command was OK
3065 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3066 (I found it when inspecting the code).
3068 20. There is now an overall timeout for performing a callout verification. It
3069 defaults to 4 times the callout timeout, which applies to individual SMTP
3070 commands during the callout. The overall timeout applies when there is more
3071 than one host that can be tried. The timeout is checked before trying the
3072 next host. This prevents very long delays if there are a large number of
3073 hosts and all are timing out (e.g. when the network connections are timing
3074 out). The value of the overall timeout can be changed by specifying an
3075 additional sub-option for "callout", called "maxwait". For example:
3077 verify = sender/callout=5s,maxwait=20s
3079 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3080 to the end before writing, but this should make it even safer).
3082 22. Exim was forgetting that it had advertised PIPELINING for the second and
3083 subsequent messages on an SMTP connection. It was also not resetting its
3084 memory on STARTTLS and an internal HELO.
3086 23. When Exim logs an SMTP synchronization error within a session, it now
3087 records whether PIPELINING has been advertised or not.
3089 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3090 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3091 rather than long int.
3093 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3095 26. Added the never_mail option to autoreply.
3101 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3102 crash if the getsockname() call failed; this can happen if a connection is
3103 closed very soon after it is established. The problem was simply in the
3104 order in which certain operations were done, causing Exim to try to write
3105 to the SMTP stream before it had set up the file descriptor. The bug has
3106 been fixed by making things happen in the correct order.
3112 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3113 before the connection was closed, thus losing the rejection response.
3115 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3116 some early Solaris releases, but causes trouble in current releases where
3117 socklen_t is defined.
3119 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3122 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3125 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3126 that releasing the top of it at the end releases what was used for sub-
3127 expansions (unless the block got too big). However, discard this block if
3128 the first thing is a variable or header, so that we can use its block when
3129 it is dynamic (useful for very large $message_headers, for example).
3131 6. Lookups now cache *every* query, not just the most recent. A new, separate
3132 store pool is used for this. It can be recovered when all lookup caches are
3133 flushed. Lookups now release memory at the end of their result strings.
3134 This has involved some general refactoring of the lookup sources.
3136 7. Some code has been added to the store_xxx() functions to reduce the amount
3137 of flapping under certain conditions.
3139 8. log_incoming_interface used to affect only the <= reception log lines. Now
3140 it causes the local interface and port to be added to several more SMTP log
3141 lines, for example "SMTP connection from", and rejection lines.
3143 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3145 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3147 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3148 could be overwritten at the end of the current message (or the start of a
3149 new message if it was set in a HELO ACL). The value is now preserved for
3150 the duration of the SMTP connection.
3152 12. If a transport had a headers_rewrite setting, and a matching header line
3153 contained an unqualified address, that address was qualified, even if it
3154 did not match any rewriting rules. The underlying bug was that the values
3155 of the flags that permit the existence of unqualified sender and recipient
3156 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3157 non-local messages, and by -bnq for local messages) were not being
3158 preserved with the message after it was received.
3160 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3161 "next input=" as part of the text comprising the host identity instead of
3162 the correct text. The code was using the same buffer for two different
3163 strings. However, depending on which order the printing function evaluated
3164 its arguments, the bug did not always show up. Under Linux, for example, my
3165 test suite worked just fine.
3167 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3168 doesn't work with some older versions of Perl. It has been changed to "my",
3169 which in any case is probably the better facility to use.
3171 15. A really picky compiler found some instances of statements for creating
3172 error messages that either had too many or two few arguments for the format
3175 16. The size of the buffer for calls to the DNS resolver has been increased
3176 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3177 for addresses that have a lot of PTR records. This alleviates a problem; it
3178 does not fully solve it.
3180 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3181 buffer now truncates the list and logs the incident, which is the same
3182 action as happens when Exim is looking up a host name and its aliases.
3183 Previously in this situation something unpredictable would happen;
3184 sometimes it was "internal error: store_reset failed".
3186 18. If a server dropped the connection unexpectedly when an Exim client was
3187 using GnuTLS and trying to read a response, the client delivery process
3188 crashed while trying to generate an error log message.
3190 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3191 string, for example:
3193 warn message = H1: something\nH2: something
3195 the text was added as a single header line from Exim's point of view
3196 though it ended up OK in the delivered message. However, searching for the
3197 second and subsequent header lines using $h_h2: did not work. This has been
3198 fixed. Similarly, if a system filter added multiple headers in this way,
3199 the routers could not see them.
3201 20. Expanded the error message when iplsearch is called with an invalid key to
3202 suggest using net-iplsearch in a host list.
3204 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3205 ACLs are no longer actually imposed (and a message to that effect is
3208 22. If a "gecos" field in a passwd entry contained escaped characters, in
3209 particular, if it contained a \" sequence, Exim got it wrong when building
3210 a From: or a Sender: header from that name. A second bug also caused
3211 incorrect handling when an unquoted " was present following a character
3212 that needed quoting.
3214 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3215 was not being matched caselessly.
3217 24. Arranged for all hyphens in the exim.8 source to be escaped with
3220 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3221 properly. Recipient callout cache records were still being keyed to include
3222 the sender, even when use_sender was set false. This led to far more
3223 callouts that were necessary. The sender is no longer included in the key
3224 when use_sender is false.
3226 26. Added "control = submission" modifier to ACLs.
3228 27. Added the ${base62d: operator to decode base 62 numbers.
3230 28. dnsdb lookups can now access SRV records.
3232 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3233 the configuration file.
3235 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3236 (-v) mode. This makes the output for a verbose queue run more intelligible.
3238 31. Added a use_postmaster feature to recipient callouts.
3240 32. Added the $body_zerocount variable, containing the number of binary zero
3241 bytes in the message body.
3243 33. The time of last modification of the "new" subdirectory is now used as the
3244 "mailbox time last read" when there is a quota error for a maildir
3247 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3249 35. Added +ignore_unknown as a special item in host lists.
3251 36. Code for decoding IPv6 addresses in host lists is now included, even if
3252 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3253 address was recognized as an IP address, but was then not correctly decoded
3254 into binary, causing unexpected and incorrect effects when compared with
3261 1. Very minor rewording of debugging text in manualroute to say "list of
3262 hosts" instead of "hostlist".
3264 2. If verify=header_syntax was set, and a header line with an unqualified
3265 address (no domain) and a large number of spaces between the end of the
3266 name and the colon was received, the reception process suffered a buffer
3267 overflow, and (when I tested it) crashed. This was caused by some obsolete
3268 code that should have been removed. The fix is to remove it!
3270 3. When running in the test harness, delay a bit after writing a bounce
3271 message to get a bit more predictability in the log output.
3273 4. Added a call to search_tidyup() just before forking a reception process. In
3274 theory, someone could use a lookup in the expansion of smtp_accept_max_
3275 per_host which, without the tidyup, could leave open a database connection.
3277 5. Added the variables $recipient_data and $sender_data which get set from a
3278 lookup success in an ACL "recipients" or "senders" condition, or a router
3279 "senders" option, similar to $domain_data and $local_part_data.
3281 6. Moved the writing of debug_print from before to after the "senders" test
3284 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3285 problems for message scanning, either using a data ACL, or using
3286 local_scan() because the Received: header was not generated till after they
3287 were called (in order to set the time as the time of reception completion).
3288 I have revised the way this works. The header is now generated after the
3289 body is received, but before the ACL or local_scan() are called. After they
3290 are run, the timestamp in the header is updated.
3296 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3297 before starting a queue runner without re-exec. This happened only when
3298 deliver_drop_privilege was set or when the Exim user was set to root. The
3299 effect of the bug was that timeouts during subsequent deliveries caused
3300 crashes instead of being properly handled. The handler is now left at its
3301 default (and expected) setting.
3303 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3304 message, again when deliver_drop_privilege is set or Exim is run as root.
3305 The bug described in (1) was not present in this case, but the tidying up
3306 of the other signals was missing. I have made the two cases consistent.
3308 3. The ignore_target_hosts setting on a manualroute router was being ignored
3309 for hosts that were looked up using the /MX notation.
3311 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3314 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3315 operated on the sender address. After changing the $sender_address to <>
3316 for the sender address verify, Exim was re-instated it as the original
3317 (before rewriting) address, but remembering that it had rewritten it, so it
3318 wasn't rewriting it again. This bug also had the effect of breaking the
3319 sender address verification caching when the sender address was rewritten.
3321 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3322 This has been changed so that if the ip literal address matches
3323 ignore_target_hosts, the router declines.
3325 7. Added expansion conditions match_domain, match_address, and match_local_
3326 part (NOT match_host).
3328 8. The placeholder for the Received: header didn't have a length field set.
3330 9. Added code to Exim itself and to exim_lock to test for a specific race
3331 condition that could lead to file corruption when using MBX delivery. The
3332 issue is with the lockfile that is created in /tmp. If this file is removed
3333 after a process has opened it but before that process has acquired a lock,
3334 there is the potential for a second process to recreate the file and also
3335 acquire a lock. This could lead to two Exim processes writing to the file
3336 at the same time. The added code performs the same test as UW imapd; it
3337 checks after acquiring the lock that its file descriptor still refers to
3338 the same named file.
3340 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3341 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3344 11. Added the smtp_active_hostname option. If used, this will typically be made
3345 to depend on the incoming interface address. Because $interface_address is
3346 not set up until the daemon has forked a reception process, error responses
3347 that can happen earlier (such as "too many connections") no longer contain
3350 12. If an expansion in a condition on a "warn" statement fails because a lookup
3351 defers, the "warn" statement is abandoned, and the next ACL statement is
3352 processed. Previously this caused the whole ACL to be aborted.
3354 13. Added the iplsearch lookup type.
3356 14. Added ident_timeout as a log selector.
3358 15. Added tls_certificate_verified as a log selector.
3360 16. Added a global option tls_require_ciphers (compare the smtp transport
3361 option of the same name). This controls incoming TLS connections.
3363 17. I finally figured out how to make tls_require_ciphers do a similar thing
3364 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3365 before starting the TLS session.
3367 18. Tabs are now shown as \t in -bP output.
3369 19. If the log selector return_path_on_delivery was set, Exim crashed when
3370 bouncing a message because it had too many Received: header lines.
3372 20. If two routers both had headers_remove settings, and the first one included
3373 a superfluous trailing colon, the final name in the first list and the
3374 first name in the second list were incorrectly joined into one item (with a
3375 colon in the middle).
3381 1. Added -C and -D options to the exinext utility, mainly to make it easier
3382 to include in the automated testing, but these could be helpful when
3383 multiple configurations are in use.
3385 2. The exinext utility was not formatting the output nicely when there was
3386 an alternate port involved in the retry record key, nor when there was a
3387 message id as well (for retries that were specific to a specific message
3388 and a specific host). It was also confused by IPv6 addresses, because of
3389 the additional colons they contain. I have fixed the IPv4 problem, and
3390 patched it up to do a reasonable job for IPv6.
3392 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3393 delivery, the log line now contains "pipelined" if PIPELINING was used.
3395 4. An SMTP transport process used to panic and die if the bind() call to set
3396 an explicit outgoing interface failed. This has been changed; it is now
3397 treated in the same way as a connect() failure.
3399 5. A reference to $sender_host_name in the part of a conditional expansion
3400 that was being skipped was still causing a DNS lookup. This no longer
3403 6. The def: expansion condition was not recognizing references to header lines
3404 that used bh_ and bheader_.
3406 7. Added the _cache feature to named lists.
3408 8. The code for checking quota_filecount in the appendfile transport was
3409 allowing one more file than it should have been.
3411 9. For compatibility with Sendmail, the command line option
3419 and sets the incoming protocol and host name (for trusted callers). The
3420 host name and its colon can be omitted when only the protocol is to be set.
3421 Note the Exim already has two private options, -pd and -ps, that refer to
3422 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3423 "s", but I don't think that's a major issue.
3425 10. A number of refactoring changes to the code, none of which should affect
3428 (a) The number of logging options was getting close to filling up the
3429 32-bit word that was used as a bit map. I have split them into two classes:
3430 those that are passed in the argument to log_write(), and those that are
3431 only ever tested independently outside of that function. These are now in
3432 separate 32-bit words, so there is plenty of room for expansion again.
3433 There is no change in the user interface or the logging behaviour.
3435 (b) When building, for example, log lines, the code previously used a
3436 macro that called string_cat() twice, in order to add two strings. This is
3437 not really sufficiently general. Furthermore, there was one instance where
3438 it was actually wrong because one of the argument was used twice, and in
3439 one call a function was used. (As it happened, calling the function twice
3440 did not affect the overall behaviour.) The macro has been replaced by a
3441 function that can join an arbitrary number of extra strings onto a growing
3444 (c) The code for expansion conditions now uses a table and a binary chop
3445 instead of a serial search (which was left over from when there were very
3446 few conditions). Also, it now recognizes conditions like "pam" even when
3447 the relevant support is not compiled in: a suitably worded error message is
3448 given if an attempt is made to use such a condition.
3450 11. Added ${time_interval:xxxxx}.
3452 12. A bug was causing one of the ddress fields not to be passed back correctly
3453 from remote delivery subprocesses. The field in question was not being
3454 subsequently used, so this caused to problems in practice.
3456 13. Added new log selectors queue_time and deliver_time.
3458 14. Might have fixed a bug in maildirsizefile handling that threw up
3459 "unexpected character" debug warnings, and recalculated the data
3460 unnecessarily. In any case, I expanded the warning message to give more
3463 15. Added the message "Restricted characters in address" to the statements in
3464 the default ACL that block characters like @ and % in local parts.
3466 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3467 Three changes have been made:
3469 (a) There was a serious bug; a negative response to MAIL caused the whole
3470 recipient domain to be cached as invalid, thereby blocking all messages
3471 to all local parts at the same domain, from all senders. This bug has
3472 been fixed. The domain is no longer cached after a negative response to
3473 MAIL if the sender used is not empty.
3475 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3478 (c) A new callout option, "use_sender" has been added for people who want
3479 the modified behaviour.
3485 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3488 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3489 indeed breaks things for older releases.
3491 3. Added additional logging to the case where there is a problem reading data
3492 from a filter that is running in a subprocess using a pipe, in order to
3493 try to track down a specific problem.
3495 4. Testing facility fudge: when running in the test harness and attempting
3496 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3497 getting "No route to host". Convert this to a timeout.
3499 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3502 6. Some OS don't have socklen_t but use size_t instead. This affects the
3503 fifth argument of getsockopt() amongst other things. This is now
3504 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3505 can be set for individual OS. I have set it for SunOS5, OSF1, and
3506 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3507 some earlier ones do not.
3509 7. Change 4.30/15 was not doing the test caselessly.
3511 8. The standard form for an IPv6 address literal was being rejected by address
3512 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3513 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3514 this, as well as the form without the "IPv6" on the front (but only when
3515 address literals are enabled, of course).
3517 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3519 10. Exim crashed if a message with an empty sender address specified by -f
3520 encountered a router with an errors_to setting. This could be provoked only
3521 by a command such as
3525 where an empty string was supplied; "<>" did not hit this bug.
3527 11. Installed PCRE release 4.5.
3529 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3530 remained set. It is now erased.
3532 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3533 times from message ids (which are base 36 rather than the normal 62).
3535 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3536 were being counted as actual protocol errors, and logged if the log
3537 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3538 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3539 and DATA following a set of rejected RCPTs do not count as protocol errors.
3540 In other words, Exim assumes they were pipelined, though this may not
3541 actually be the case. Of course, in all cases the client gets an
3542 appropriate error code.
3544 15. If a lookup fails in an ACL condition, a message about the failure may
3545 be available; it is used if testing the ACL cannot continue, because most
3546 such messages specify what the cause of the deferral is. However, some
3547 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3548 that caused an old message to be retained and used if a later statement
3549 caused a defer, replacing the real cause of the deferral.
3551 16. If an IP address had so many PTR records that the DNS lookup buffer
3552 was not large enough to hold them, Exim could crash while trying to process
3553 the truncated data. It now detects and logs this case.
3555 17. Further to 4.21/58, another change has been made: if (and only if) the
3556 first line of a message (the first header line) ends with CRLF, a bare LF
3557 in a subsequent header line has a space inserted after it, so as not to
3558 terminate the header.
3560 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3561 unnecessarily, used atoi() instead of strtol(), and didn't check the
3562 termination when getting file sizes from file names by regex.
3564 19. Completely re-implemented the support for maildirsize files, in the light
3565 of a number of problems with the previous contributed implementation
3566 (4.30/29). In particular:
3568 . If the quota is zero, the maildirsize file is maintained, but no quota is
3571 . If the maildir directory does not exist, it is created before any attempt
3572 to write a maildirsize file.
3574 . The quota value in the file is just a cache; if the quota is changed in
3575 the transport, the new value overrides.
3577 . A regular expression is available for excluding directories from the
3580 20. The autoreply transport checks the characters in options that define the
3581 message's headers; it allows continued headers, but it was checking with
3582 isspace() after an embedded newline instead of explicitly looking for a
3585 21. If all the "regular" hosts to which an address was routed had passed their
3586 expiry times, and had not reached their retry times, the address was
3587 bounced, even if fallback hosts were defined. Now Exim should go on to try
3590 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3591 equivalent code in the SMTP transport. Some hosts send humungous responses
3592 to HELO/EHLO, more than 1024 it seems.
3594 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3595 gives compiler warnings in some environments. I've now done it "properly",
3598 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3599 (because of problems with the built-in one) was declared to return uschar *
3600 instead of char *, causing compiler failure.
3602 25. Fixed a file descriptor leak when processing alias/forward files.
3604 26. Fixed a minor format string issue in dbfn.c.
3606 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3608 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3609 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3612 29. When a sender address is verified, it is cached, to save repeating the test
3613 when there is more than one recipient in a message. However, when the
3614 verification involves a callout, it is possible for different callout
3615 options to be set for different recipients. It is too complicated to keep
3616 track of this in the cache, so now Exim always runs a verification when a
3617 callout is required, relying on the callout cache for the optimization.
3618 The overhead is duplication of the address routing, but this should not be
3621 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3622 to be verified with callout=postmaster, and the main callout worked but the
3623 postmaster check failed, the verification correctly failed. However, if a
3624 subsequent RCPT command asked for sender verification *without* the
3625 postmaster check, incorrect caching caused this verification also to fail,
3628 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3629 it was not caching the DNS options (qualify_single, search_parents) that
3630 were used when the lookup failed. A subsequent lookup with different
3631 options therefore always gave the same answer, though there were cases
3632 where it should not have. (Example: a "domains = !$mx_any" option on a
3633 dnslookup router: the "domains" option is always processed without any
3634 widening, but the router might have qualify_single set.) Now Exim uses the
3635 cached value only when the same options are set.
3637 32. Added John Jetmore's "exipick" utility to the distribution.
3639 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3640 than a timeout (e.g. a certificate is required, and is not provided), an
3641 Exim server now closes the connection immediately. Previously it waited for
3642 the client to close - but if the client is SSL, it seems that they each
3643 wait for each other, leading to a delay before one of them times out.
3645 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3646 maintained 0.8.x compatibility because I don't think many are using it, and
3647 it is clearly obsolete.
3649 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3652 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3653 client certificate was expired. A simple patch fixes this, though I don't
3654 understand the full logic of why the verify callback is called multiple
3657 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3658 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3659 which causes problems with some clients (such as the Certicom SSL Plus
3660 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3661 disables the coutermeasure allowing Eudora to connect."
3663 38. Exim was not checking that a write() to a log file succeeded. This could
3664 lead to Bad Things if a log got too big, in particular if it hit a file
3665 size limit. Exim now panics and dies if it cannot write to a log file, just
3666 as it does if it cannot open a log file.
3668 39. Modified OS/Makefile-Linux so that it now contains
3670 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3672 The two -D definitions ensure that Exim is compiled with large file
3673 support, which makes it possible to handle log files that are bigger than
3676 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3677 instance) a domain was checked against a named list that involved a lookup,
3678 causing $domain_data to be set, then another domain was checked against the
3679 same list, then the first domain was re-checked, the value of $domain_data
3680 after the final check could be wrong. In particular, if the second check
3681 failed, it could be set empty. This bug probably also applied to
3684 41. The strip_trailing_dot option was not being applied to the address given
3685 with the -f command-line option.
3687 42. The code for reading a message's header from the spool was incrementing
3688 $received_count, but never initializing it. This meant that the value was
3689 incorrect (doubled) while delivering a message in the same process in which
3690 it was received. In the most common configuration of Exim, this never
3691 happens - a fresh exec is done - but it can happen when
3692 deliver_drop_privilege is set.
3694 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3695 it now includes up to 150 characters of the unexpected data in the log
3698 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3699 and building data strings. The size of both of these buffers was 10 000
3700 bytes - far larger than anybody would *ever* want, thought I. Needless to
3701 say, somebody hit the limit. I have increased the maximum line length to
3702 20 000 and the maximum data length of concatenated lines to 100 000. I have
3703 also fixed two bugs, because there was no checking on these buffers. Tsk,
3704 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3705 buffer is too small.
3707 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3708 lsearch lookups. Now it does.
3710 46. When parsing a route_list item in a manualroute router, a fixed-length
3711 buffer was used for the list of hosts. I made this 1024 bytes long,
3712 thinking that nobody would ever have a list of hosts that long. Wrong.
3713 Somebody had a whole pile of complicated expansion conditions, and the
3714 string was silently truncated, leading to an expansion error. It turns out
3715 that it is easier to change to an unlimited length (owing to other changes
3716 that have happened since this code was originally written) than to build
3717 structure for giving a limitation error. The length of the item that
3718 expands into the list of hosts is now unlimited.
3720 47. The lsearch lookup could not handle data where the length of text line was
3721 more than 4095 characters. Such lines were truncated, leading to shortened
3722 data being returned. It should now handle lines of any length.
3724 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3725 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3728 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3729 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3730 no longer happens in comment lines. A list of replacements is now placed
3731 at the head of all of the source files, except those whose only change is
3732 to replace PERL_COMMAND in the very first #! line.
3734 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3735 messages on the queue, with a bottom-up merge sort, using code contributed
3736 by Michael Haardt. This should make operations like -bp somewhat faster on
3737 large queues. It won't affect queue runners, except when queue_run_in_order
3740 51. Installed eximstats 1.31 in the distribution.
3742 52. Added support for SRV lookups to the dnslookup router.
3744 53. If an ACL referred to $message_body or $message_body_end, the value was not
3745 reset for any messages that followed in the same SMTP session.
3747 54. The store-handling optimization for building very long strings was not
3748 differentiating between the different store pools. I don't think this
3749 actually made any difference in practice, but I've tidied it.
3751 55. While running the routers to verify a sender address, $sender_address
3752 was still set to the sender address. This is wrong, because when routing to
3753 send a bounce to the sender, it would be empty. Therefore, I have changed
3754 it so that, while verifying a sender address, $sender_address is set to <>.
3755 (There is no change to what happens when verifying a recipient address.)
3757 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3758 target A or AAAA records (if not already returned) without resetting the
3759 qualify_single or search_parents options of the DNS resolver. These are
3760 inappropriate in this case because the targets of MX and SRV records must
3761 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3762 target that, when qualified, matched something in the local domain. These
3763 two options are now turned off when doing these lookups.
3765 57. It seems that at least some releases of Reiserfs (which does not have the
3766 concept of a fixed number of inodes) returns zero and not -1 for the
3767 number of available inodes. This interacted badly with check_spool_inodes,
3768 which assumed that -1 was the "no such thing" setting. What I have done is
3769 to check that the total number of inodes is greater than zero before doing
3770 the test of how many are available.
3772 58. When a "warn" ACL statement has a log_message modifier, the message is
3773 remembered, and not repeated. This is to avoid a lot of repetition when a
3774 message has many recipients that cause the same warning to be written.
3775 Howewer, Exim was preserving the list of already written lines for an
3776 entire SMTP session, which doesn't seem right. The memory is now reset if a
3777 new message is started.
3779 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3780 debugging output unless log_rewrite was also set.
3782 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3783 of (int)(handle) when we know that handle contains (void *)(-1).
3785 61. The Exim daemon panic-logs an error return when it closes the incoming
3786 connection. However "connection reset by peer" seems to be common, and
3787 isn't really an error worthy of noting specially, so that particular error
3790 62. When Exim is trying to find all the local interfaces, it used to panic and
3791 die if the ioctl to get the interface flags failed. However, it seems that
3792 on at least one OS (Solaris 9) it is possible to have an interface that is
3793 included in the list of interfaces, but for which you get a failure error
3794 for this call. This happens when the interface is not "plumbed" into a
3795 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3796 failure of the "get flags" call assumes that the interface is down.
3798 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3799 makes life easier for people who are doing arithmetic on fields extracted
3800 from dates, where you often get leading zeros that should not be
3801 interpreted as octal.
3803 64. Added qualify_domain to the redirect router, to override the global
3806 65. If a pathologically long header line contained very many addresses (the
3807 report of this problem mentioned 10 000) and each of them was rewritten,
3808 Exim could use up a very large amount of memory. (It kept on making new
3809 copies of the header line as it rewrote, and never released the old ones.)
3810 At the expense of a bit more processing, the header rewriting function has
3811 been changed so that it no longer eats memory in this way.
3813 66. The generation of the Received: header has been moved from the time that a
3814 message starts to be received, to the time that it finishes. The timestamp
3815 in the Received: header should now be very close to that of the <= log
3816 line. There are two side-effects of this change:
3818 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3819 logged header lines no longer include the local Received: line, because
3820 it has not yet been created. The same applies to a copy of the message
3821 that is returned to a non-SMTP sender when a message is rejected.
3823 (b) When a filter file is tested using -bf, no additional Received: header
3824 is added to the test message. After some thought, I decided that this
3827 This change does not affect the value of $received_for. It is still set
3828 after address rewriting, but before local_scan() is called.
3830 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3832 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3833 gave an unhelpful panic error message, and a defer error. I have managed to
3834 change this behaviour so that it now rejects any supplied certificate,
3835 which seems right, as the list of acceptable certificates is empty.
3837 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3838 gave an unhelpful defer error. I have not managed to make this reject any
3839 supplied certificates, but the error message it gives is "no certificate
3840 supplied", which is not helpful.
3842 70. exigrep's output now also includes lines that are not associated with any
3843 message, but which match the given pattern. Implemented by a patch from
3844 Martin Sluka, which also tidied up the Perl a bit.
3846 71. Recipient callout verification, like sender verification, was using <> in
3847 the MAIL FROM command. This isn't really the right thing, since the actual
3848 sender may affect whether the remote host accepts the recipient or not. I
3849 have changed it to use the actual sender in the callout; this means that
3850 the cache record is now keyed on a recipient/sender pair, not just the
3851 recipient address. There doesn't seem to be a real danger of callout loops,
3852 since a callout by the remote host to check the sender would use <>.
3853 [SEE ABOVE: changed after hitting problems.]
3855 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3856 temporary errors. However, in the case of such a code being given after
3857 the end of a data transmission (i.e. after ".") Exim was failing to write
3858 a retry record for the message. (Yes, there was some broken host that was
3859 actually sending 8xx at this point.)
3861 73. An unknown lookup type in a host list could cause Exim to panic-die when
3862 the list was checked. (An example that provoked this was putting <; in the
3863 middle of a list instead of at the start.) If this happened during a DATA
3864 ACL check, a -D file could be left lying around. This kind of configuration
3865 error no longer causes Exim to die; instead it causes a defer errror. The
3866 incident is still logged to the main and panic logs.
3868 74. Buglet left over from Exim 3 conversion. The message "too many messages
3869 in one connection" was written to the rejectlog but not the mainlog, except
3870 when address rewriting (yes!) was being logged.
3872 75. Added write_rejectlog option.
3874 76. When a system filter was run not as root (that is, when system_filter_user
3875 was set), the values of the $n variables were not being returned to the
3876 main process; thus, they were not subsequently available in the $sn
3879 77. Added +return_path_on_delivery log selector.
3881 78. A connection timeout was being treated differently from recipients deferred
3882 when testing hosts_max_try with a message that was older than the host's
3883 retry timeout. (The host should not be counted, thus allowing all hosts to
3884 be tried at least once before bouncing.) This may have been the cause of an
3885 occasionally reported bug whereby a message would remain on the queue
3886 longer than the retry timeout, but would be bounced if a delivery was
3887 forced. I say "may" because I never totally pinned down the problem;
3888 setting up timeout/retry tests is difficult. See also the next item.
3890 79. The ultimate address timeout was not being applied to errors that involved
3891 a combination of host plus message (for example, a timeout on a MAIL
3892 command). When an address resolved to a number of possible hosts, and they
3893 were not all tried for each delivery (e.g. because of hosts_max_try), a
3894 message could remain on the queue longer than the retry timeout.
3896 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3899 81. Fixed an obscure SMTP outgoing bug which required at least the following
3900 conditions: (a) there was another message waiting for the same server;
3901 (b) the server returned 5xx to all RCPT commands in the first message so
3902 that the message was not completed; (c) the server dropped the connection
3903 or gave a negative response to the RSET that Exim sends to abort the
3904 transaction. The observed case was a dropped connection after DATA that had
3905 been sent in pipelining mode. That is, the server had advertised PIPELINING
3906 but was not implementing it correctly. The effect of the bug was incorrect
3907 behaviour, such as trying another host, and this could lead to a crash.
3913 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3914 and daemon.c were passed as pointers to ints; they should have been
3915 pointers to socklen_t variables (which are typically unsigned ints).
3917 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3920 3. Fixed a really odd bug that affected only the testing scheme; patching a
3921 certain fixed string in the binary changed the value of another string that
3922 happened to be identical to the end of the original first string.
3924 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3925 name", it returns that address as the IP address. On some operating
3926 systems (e.g. Solaris), it also passes back the IP address string as the
3927 "host name". However, on others (e.g. Linux), it passes back an empty
3928 string. Exim wasn't checking for this, and was changing the host name to an
3929 empty string, assuming it had been canonicized.
3931 5. Although rare, it is permitted to have more than one PTR record for a given
3932 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3933 all the names associated with an address, because they do in Solaris.
3934 However, it seems that they do not in Linux for data that comes from the
3935 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3936 I found this out when I moved to a new Linux workstation and tried to run
3937 the Exim test suite.
3939 To get round this problem I have changed the code so that it now does its
3940 own call to the DNS to look up PTR records when searching for a host name.
3941 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3942 addresses that are only in /etc/hosts are still found.
3944 This behaviour is, however, controlled by an option called host_lookup_
3945 order, which defaults to "bydns:byaddr". If people want to use the other
3946 order, or indeed, just use one or the other means of lookup, they can
3947 specify it in this variable.
3949 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3950 some operating systems, this comes back from gethostbyaddr() as an empty
3951 string, and this is what Exim used to test for. However, it seems that in
3952 other systems, "." is yielded. Exim now tests for this case too.
3954 7. The values of check_spool_space and check_log_space are now held internally
3955 as a number of kilobytes instead of an absolute number of bytes. If a
3956 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3957 kilobyte. This means that much larger values can be stored.
3959 8. Exim monitor: an attempt to get the action menu when not actually pointing
3960 at a message produces an empty menu entitled "No message selected". This
3961 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3962 no entries in it ("Shell widget menu has zero width and/or height"). So I
3963 have added a single, blank menu entry in this case.
3965 9. Added ${quote_local_part.
3967 10. MIME decoding is now applied to the contents of Subject: header lines when
3970 11. Now that a reference to $sender_host_address automatically causes a reverse
3971 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3972 host lookup before query-style lookups in lists that might use this
3973 variable. This has therefore been abolished, and the "net-" prefix is no
3974 longer necessary for query-style lookups.
3976 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3977 have been a typo for LFLAGS, so it has been changed.
3979 13. The install script calls Exim with "-C /dev/null" in order to find the
3980 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3981 to be output. Howeve, since Exim outputs its version number before the
3982 error, it didn't break the script. It just looked ugly. I fixed this by
3983 always allowing "-C /dev/null" if the caller is root.
3985 14. Ignore overlarge ACL variable number when reading spool file - insurance
3986 against a later release with more variables having written the file.
3988 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3989 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3990 this, as well as the form without the "IPv6" on the front.
3992 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3993 OS/Makefile-Darwin file.
3995 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3996 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3998 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3999 variable. However, some OS use ints for inodes. I've added cast to long int
4000 to get rid of the compiler warning.
4002 19. I had forgotten to lock out "/../" in configuration file names when
4003 ALT_CONFIG_PREFIX was set.
4005 20. Routers used for verification do not need to specify transports. However,
4006 if such a router generated a host list, and callout was configured, Exim
4007 crashed, because it could not find a port number from the (non-existent)
4008 transport. It now assumes port 25 in this circumstance.
4010 21. Added the -t option to exigrep.
4012 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4013 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4014 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4015 them is set, LOOKUP_LSEARCH is forced.
4017 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4019 24. Added sender and host information to the "rejected by local_scan()" log
4020 line; previously there was no indication of these.
4022 25. Added .include_if_exists.
4024 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4025 Linux. It turns out that not all file systems support this. Apparently some
4026 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4027 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4028 not supported on the file descriptor, is now ignored when Exim is trying to
4029 sync a directory. This applies only to Linux.
4031 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4033 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4034 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4037 29. Added support for maildirsize files from supplied patch (modified a bit).
4039 30. The use of :fail: followed by an empty string could lead Exim to respond to
4040 sender verification failures with (e.g.):
4042 550 Verification failed for <xxx>
4043 550 Sender verify failed
4045 where the first response line was missing the '-' that indicates it is not
4046 the final line of the response.
4048 31. The loop for finding the name of the user that called Exim had a hardwired
4049 limit of 10; it now uses the value of finduser_retries, which is used for
4050 all other user lookups.
4052 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4055 33. Exim was neglecting to zero errno before one call of strtol() when
4056 expanding a string and expecting an integer value. On some systems this
4057 resulted in spurious "integer overflow" errors. Also, it was casting the
4058 result into an int without checking.
4060 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4061 did not work. The code looks as if it has *never* worked, though it appears
4062 to have been documented since at least releast 1.62. I have made it work.
4064 35. The "timeout_DNS" error in retry rules, also documented since at least
4065 1.62, also never worked. As it isn't clear exactly what this means, and
4066 clearly it isn't a major issue, I have abolished the feature by treating it
4067 as "timeout", and writing a warning to the main and panic logs.
4069 36. The display of retry rules for -brt wasn't always showing the error code
4072 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4073 timeout_connect_A, timeout_connect_MX.
4075 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4076 to the empty sender.
4078 39. The daemon was not analysing the content of -oX till after it had closed
4079 stderr and disconnected from the controlling terminal. This meant that any
4080 syntax errors were only noted on the panic log, and the return code from
4081 the command was 0. By re-arranging the code a little, I've made the
4082 decoding happen first, so such errors now appear on stderr, and the return
4083 code is 1. However, the actual setting up of the sockets still happens in
4084 the disconnected process, so errors there are still only recorded on the
4087 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4088 connections (as happens on some IP stacks) was logged at start up time as
4089 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4090 it from "IPv6 and IPv4", which means that two separate sockets are being
4093 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4094 says whether AF_INET or AF_INET6 was passed as an argument.
4096 42. Exiwhat output was messed up when time zones were included in log
4099 43. Exiwhat now gives more information about the daemon's listening ports,
4100 and whether -tls-on-connect was used.
4102 44. The "port" option of the smtp transport is now expanded.
4104 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4105 silently ignored. Now an error message is written to the main and panic
4108 46. There's a new ACL modifier called "logwrite" which writes to a log file
4109 as soon as it is encountered.
4111 47. Added $local_user_uid and $local_user_gid at routing time.
4113 48. Exim crashed when trying to verify a sender address that was being
4116 49. Exim was recognizing only a space character after ".include". It now also
4117 recognizes a tab character.
4119 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4120 extracting the relevant information from the specification. The man page no
4121 longer contains scrambled data for the -d option, and I've added a section
4122 at the front about calling Exim under different names.
4124 51. Added "extra_headers" argument to the "mail" command in filter files.
4126 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4129 53. Installed eximstats 1.29.
4131 54. Added transport_filter_timeout as a generic transport option.
4133 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4134 Cc: header lines. This was required by RFC 822, but it not required by RFC
4137 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4138 incoming messages that did not have them. Now it does so only if the
4139 message originates locally, that is, if there is no associated remote host
4140 address. When Resent- header lines are present, this applies to the Resent-
4141 lines rather than the non-Resent- lines.
4143 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4144 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4146 58. Messages for configuration errors now include the name of the main
4147 configuration file - useful now that there may be more than one file in a
4148 list (.included file names were always shown).
4150 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4151 for those rare installations that do not start the daemon as root or run it
4152 setuid root. I've cut out the call to initgroups() if the daemon is not
4155 60. The Exim user and group can now be bound into the binary as text strings
4156 that are looked up at the start of Exim's processing.
4158 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4160 62. Added $mailstore_basename variable.
4162 63. Installed patch to sieve.c from Michael Haardt.
4164 64. When Exim failed to open the panic log after failing to open the main log,
4165 the original message it was trying to log was written to stderr and debug
4166 output, but if they were not available (the usual case in production), it
4167 was lost. Now it is written to syslog before the two lines that record the
4168 failures to open the logs.
4170 65. Users' Exim filters run in subprocesses under the user's uid. It is
4171 possible for a "deliver" command or an alias in a "personal" command to
4172 provoke an address rewrite. If logging of address rewriting is configured,
4173 this fails because the process is not running as root or exim. There may be
4174 a better way of dealing with this, but for the moment (because 4.30 needs
4175 to be released), I have disabled address rewrite logging when running a
4176 filter in a non-root, non-exim process.
4182 1. The buildconfig auxiliary program wasn't quoting the value set for
4183 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4184 not defined. This bug was masked in 4.22 by the effect that was fixed in
4187 2. Some messages that were rejected after a message id was allocated were
4188 shown as "incomplete" by exigrep. It no longer does this for messages that
4189 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4191 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4192 have allow_domain_literals set, the ID did not get logged in the <= line.
4193 Domain literals are now always recognized in Message-ID: header lines.
4195 4. The first argument for a ${extract expansion item is the key name or field
4196 number. Leading and trailing spaces in this item were not being ignored,
4197 causing some misleading effects.
4199 5. When deliver_drop_privilege was set, single queue runner processes started
4200 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4201 same command in the process it spins off) were not dropping privilege.
4203 6. When the daemon running as "exim" started a queue runner, it always
4204 re-executed Exim in the spun-off process. This is a waste of effort when
4205 deliver_drop_privilege is set. The new process now just calls the
4206 queue-runner function directly.
4212 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4215 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4216 ignored. Though the use of -oP was forcing the writing of a pid file, it
4217 was always written to the default place.
4219 3. If the message "no IP address found for host xxxx" is generated during
4220 incoming verification, it is now followed by identification of the incoming
4221 connection (so you can more easily find what provoked it).
4223 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4225 5. Added some features to "harden" Exim a bit more against certain attacks:
4227 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4228 be put in Local/Makefile. This is like the never_users runtime option,
4229 but it cannot be overridden. The default setting is "root".
4231 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4232 prefix string with which any file named in a -C command line option
4235 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4236 is retained for -C and -D only if the caller of Exim is root. Without
4237 it, the exim user may also use -C and -D and retain privilege.
4239 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4240 command line option is disabled.
4242 6. Macro names set by the -D option must start with an upper case letter, just
4243 like macro names defined in the configuration file.
4245 7. Added "dereference=" facility to LDAP.
4247 8. Two instances of the typo "uknown" in the source files are fixed.
4249 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4250 the Configure-Makefile script screwed up while processing it.
4252 10. Incorporated PCRE 4.4.
4254 11. The SMTP synchronization check was not operating right at the start of an
4255 SMTP session. For example, it could not catch a HELO sent before the client
4256 waited for the greeting. There is now a check for outstanding input at the
4257 point when the greeting is written. Because of the duplex, asynchronous
4258 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4259 way, but not yet received, when the check is performed.
4261 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4262 on TCP/IP sockets, because this apparently causes some broken clients to
4265 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4266 unchanged) from the Cygwin maintainer.
4268 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4269 was supported instead of testing for mbx. Effectively a typo.
4271 15. The spa authenticator server code was not checking that the input it
4272 received was valid base64.
4274 16. The debug output line for the "set" modifier in ACLs was not showing the
4275 name of the variable that was being set.
4277 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4279 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4280 lookup on its own. Something else was needed to trigger the lookup. For
4281 example, a match in host_lookup or the need for a host name in a host list.
4282 Now, if $sender_host_name is referenced and the host name has not yet been
4283 looked up, a lookup is performed. If the lookup fails, the variable remains
4284 empty, and $host_lookup_failed is set to "1".
4286 19. Added "eqi" as a case-independent comparison operator.
4288 20. The saslauthd authentication condition could segfault if neither service
4289 nor realm was specified.
4291 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4292 error message that was logged was misleading, and incoming SMTP
4293 connections were dropped. The message is now more accurate, and temporary
4294 errors are given to SMTP connections.
4296 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4297 (except RSET) with a 421 error, until QUIT is received. However, it was
4298 failing to send a response to QUIT.
4300 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4301 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4302 ACL is now run after the helo_try_verify_hosts code.
4304 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4305 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4306 case-independent, so other case variants are also recognized). Apparently
4307 some systems use these upper case variants.
4309 25. If more than two messages were waiting for the same host, and a transport
4310 filter was specified for the transport, Exim sent two messages over the
4311 same TCP/IP connection, and then failed with "socket operation on non-
4312 socket" when it tried to send the third.
4314 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4316 27. The extern definition of crypt16() in expand.c was not being excluded when
4317 the OS had its own crypt16() function.
4319 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4320 as a preferred synonym for return_size_limit, both as an option and as an
4323 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4325 30. Changed the default configuration ACL to relax the local part checking rule
4326 for addresses that are not in any local domains. For these addresses,
4327 slashes and pipe symbols are allowed within local parts, but the sequence
4328 /../ is explicitly forbidden.
4330 31. SPA server authentication was not clearing the challenge buffer before
4333 32. log_message in a "warn" ACL statement was writing to the reject log as
4334 well as to the main log, which contradicts the documentation and doesn't
4335 seem right (because no rejection is happening). So I have stopped it.
4337 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4338 However, I am unable to do any testing of this.
4340 34. Fixed an infelicity in the appendfile transport. When checking directories
4341 for a mailbox, to see if any needed to be created, it was accidentally
4342 using path names with one or more superfluous leading slashes; tracing
4343 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4345 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4346 contents are added to the log line that is written for every discarded
4347 recipient. (Previously a log_message setting was ignored.)
4349 36. The ${quote: operator now quotes the string if it is empty.
4351 37. The install script runs exim in order to find its version number. If for
4352 some reason other than non-existence or emptiness, which it checks, it
4353 could not run './exim', it was installing it with an empty version number,
4354 i.e. as "exim-". This error state is now caught, and the installation is
4357 38. An argument was missing from the function that creates an error message
4358 when Exim fails to connect to the socket for saslauthd authentication.
4359 This could cause Exim to crash, or give a corrupted message.
4361 39. Added isip, isip4, and isip6 to ${if conditions.
4363 40. The ACL variables $acl_xx are now saved with the message, and can be
4364 accessed later in routers, transports, and filters.
4366 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4367 strings in the file are not string-expanded.
4369 42. If a MAIL command specified a SIZE value that was too large to fit into an
4370 int variable, the check against message_size_limit failed. Such values are
4371 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4372 day this will have to be increased, but I don't think I want to be around
4373 when emails are that large.
4380 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4381 iconv() is not standard in FreeBSD.
4383 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4384 IPv6 enabled. The observed symptom was a segmentation fault on return from
4385 the function os_common_find_running_interfaces() in src/os.c.
4387 3. In the check_special_case() function in daemon.c I had used "errno" as an
4388 argument name, which causes warnings on some systems. This was basically a
4389 typo, since it was named "eno" in the comments!
4391 4. The code that waits for the clock to tick (at a resolution of some fraction
4392 of a second) so as to ensure message-id uniqueness was always waiting for
4393 at least one whole tick, when it could have waited for less. [This is
4394 almost certainly not relevant at current processor speeds, where it is
4395 unlikely to ever wait at all. But we try to future-proof.]
4397 5. The function that sleeps for a time interval that includes fractions of a
4398 second contained a race. It did not block SIGALRM between setting the
4399 timer, and suspending (a couple of lines later). If the interval was short
4400 and the sigsuspend() was delayed until after it had expired, the suspension
4401 never ended. On busy systems this could lead to processes getting stuck for
4404 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4405 process, before it forks any delivery processes. The open lookup caching
4406 mechanism meant that the open file or database connection was passed into
4407 the delivery process. The problem was that delivery processes always tidy
4408 up cached lookup data. This could cause a problem for the next delivery
4409 process started by the queue runner, because the external queue runner
4410 process does not know about the closure. So the next delivery process
4411 still has data in the lookup cache. In the case of a file lookup, there was
4412 no problem because closing a file descriptor in a subprocess doesn't affect
4413 the parent. However, if the lookup was caching a connection to a database,
4414 the connection was closed, and the second delivery process was likely to
4415 see errors such as "PGSQL: query failed: server closed the connection
4416 unexpectedly". The problem has been fixed by closing all cached lookups
4417 in a queue runner before running a delivery process.
4419 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4420 seem to have the "const" qualifier which it has on other OS. I've
4423 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4424 *of the same type* (client or server) with the same public name that an
4425 error should be diagnosed.
4427 9. When Exim looked up a host name for an IP address, but failed to find the
4428 original IP address when looking up the host name (a safety check), it
4429 output the message "<ip address> does not match any IP for NULL", which was
4430 confusing, to say the least. The bug was that the host name should have
4431 appeared instead of "NULL".
4433 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4434 user that is built into the binary, and the -C or -D options is used, root
4435 privilege is dropped before the configuration file is read. In addition,
4436 logging is switched to stderr instead of the normal log files. If the
4437 configuration then re-defines the Exim user, the unprivileged environment
4438 is probably not what is expected, so Exim logs a panic warning message (but
4441 However, if deliver_drop_privilege is set, the unprivileged state may well
4442 be exactly what is intended, so the warning has been cut out in that case,
4443 and Exim is allowed to try to write to its normal log files.
4449 1. smtp_return_error_details was not giving details for temporary sender
4450 or receiver verification errors.
4452 2. Diagnose a configuration error if two authenticators have the same public
4455 3. Exim used not to create the message log file for a message until the first
4456 delivery attempt. This could be confusing when incoming messages were held
4457 for policy or load reasons. The message log file is now created at the time
4458 the message is received, and an initial "Received" line is written to it.
4460 4. The automatically generated man page for command line options had a minor
4461 bug that caused no ill effects; however, a more serious problem was that
4462 the procedure for building the man page automatically didn't always
4463 operate. Consequently, release 4.20 contains an out-of-date version. This
4464 shouldn't happen again.
4466 5. When building Exim with embedded Perl support, the script that builds the
4467 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4468 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4470 6. The freeze_tell option was not being used for messages that were frozen on
4471 arrival, either by an ACL or by local_scan().
4473 7. Added the smtp_incomplete_transaction log selector.
4475 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4476 was accepting AUTH without a new EHLO.
4478 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4479 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4482 10. Logging of TCP/IP connections (when configured) now happens in the main
4483 daemon process instead of the child process, so that the TCP/IP connection
4484 count is more accurate (but it can never be perfect).
4486 11. The use of "drop" in a nested ACL was not being handled correctly in the
4487 outer ACL. Now, if condition failure induced by the nested "drop" causes
4488 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4489 or "require"), the connection is dropped.
4491 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4492 that yield "discard" can now be used with an "accept" or a "discard" verb,
4493 but an error is generated for any others (because I can't see a useful way
4494 to define what should happen).
4496 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4497 are now processed in the same way as lines in the Exim configuration file.
4498 In particular, continuation lines are supported.
4500 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4502 15. Added -ti meaning -t -i.
4504 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4505 domains, and warn by logging if others are found.
4507 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4508 returned from GIFCONF when Exim is trying to find the list of interfaces on
4509 a host. The code in os.c has been modified to copy each ifreq to an aligned
4510 structure in all cases.
4512 Also, in some cases, the returned ifreq's were being copied to a 'struct
4513 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4514 means the last couple of bytes of an IPv6 address could be chopped if the
4515 ifreq contained only a normal sockaddr (14 bytes storage).
4517 18. Named domain lists were not supported in the hosts_treat_as_local option.
4518 An entry such as +xxxx was not recognized, and was treated as a literal
4521 19. Ensure that header lines added by a DATA ACL are included in the reject log
4522 if the ACL subsequently rejects the message.
4524 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4525 MD5 (which is deprecated).
4527 21. When testing a filter file using -bf, Exim was writing a message when it
4528 took the sender from a "From " line in the message, but it was not doing so
4529 when it took $return_path from a Return-Path: header line. It now does.
4531 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4532 with a valid header line field name (a series of printing characters
4533 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4535 23. Changed "disc" in the source to "disk" to conform to the documentation and
4536 the book and for uniformity.
4538 24. Ignore Sendmail's -Ooption=value command line item.
4540 25. When execve() failed while trying to run a command in a pipe transport,
4541 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4542 could be confused with a return value of 69 from the command itself. This
4543 has been changed to 127, the value the shell returns if it is asked to run
4544 a non-existent command. The wording for the related log line suggests a
4545 non-existent command as the problem.
4547 26. If received_header_text expands to an empty string, do not add a Received:
4548 header line to the message. (Well, it adds a token one on the spool, but
4549 marks it "old" so that it doesn't get used or transmitted.)
4551 27. Installed eximstats 1.28 (addition of -nt option).
4553 28. There was no check for failure on the call to getsockname() in the daemon
4554 code. This can fail if there is a shortage of resources on the system, with
4555 ENOMEM, for example. A temporary error is now given on failure.
4557 29. Contrary to the C standard, it seems that in some environments, the
4558 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4559 program. Exim now does this explicitly; it affects the formatting of
4560 timestamps using strftime().
4562 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4563 complaints. I've now initialized all the variables, to avoid this.
4565 32. Header lines added by a system filter were not being "seen" during
4566 transport-time rewrites.
4568 33. The info_callback() function passed to OpenSSL is set up with type void
4569 (*)(SSL *, int, int), as described somewhere. However, when calling the
4570 function (actually a macro) that sets it up, the type void(*)() is
4571 expected. I've put in a cast to prevent warnings from picky compilers.
4573 34. If a DNS black list lookup found a CNAME record, but there were no A
4574 records associated with the domain it pointed at, Exim crashed.
4576 35. If a DNS black list lookup returned more than one A record, Exim ignored
4577 all but the first. It now scans all returned addresses if a particular IP
4578 value is being sought. In this situation, the contents of the
4579 $dnslist_value variable are a list of all the addresses, separated by a
4582 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4583 to accept a host name and all its aliases if the forward lookup for any of
4584 them yielded the IP address of the incoming connection. Now it accepts only
4585 those names whose forward lookup yields the correct IP address. Any other
4586 names are discarded. This closes a loophole whereby a rogue DNS
4587 administrator could create reverse DNS records to break through a
4588 wildcarded host restriction in an ACL.
4590 37. If a user filter or a system filter that ran in a subprocess used any of
4591 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4592 the wrong values were passed to the pipe command ($thisaddress had the
4593 value of $0, $0 had the value of $1, etc). This bug was introduced by
4594 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4596 38. Improved the line breaking for long SMTP error messages from ACLs.
4597 Previously, if there was no break point between 40 and 75 characters, Exim
4598 left the rest of the message alone. Two changes have been made: (a) I've
4599 reduced the minimum length to 35 characters; (b) if it can't find a break
4600 point between 35 and 75 characters, it looks ahead and uses the first one
4601 that it finds. This may give the occasional overlong line, but at least the
4602 remaining text gets split now.
4604 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4605 file descriptors might be low, and that setting 1000 would always raise it.
4606 It turns out that in some environments, the limit is already over 1000 and
4607 that lowering it causes trouble. So now Exim takes care not to decrease it.
4609 40. When delivering a message, the value of $return_path is set to $sender_
4610 address at the start of routing (routers may change the value). By an
4611 oversight, this default was not being set up when an address was tested by
4612 -bt or -bv, which affected the outcome if any router or filter referred to
4615 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4616 log only when "message" or "log_message" are set. However, if one of the
4617 conditions was an address verification, or a call to a nested ACL, the
4618 messages generated by the underlying test were being passed through. This
4619 no longer happens. The underlying message is available in $acl_verify_
4620 message for both "message" and "log_message" expansions, so it can be
4621 passed through if needed.
4623 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4624 new expansion $bh_ to give the encoded byte string without charset
4625 translation. Translation happens only if iconv() is available; HAVE_ICONV
4626 indicates this at build time. HEADERS_CHARSET gives the charset to
4627 translate to; headers_charset can change it in the configuration, and
4628 "headers charset" can change it in an individual filter file.
4630 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4631 that creates RFC 2047 encoded "words" labels them as that charset instead
4632 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4633 expansion operator; (ii) when Exim creates a From: line for a local
4634 message; (iii) when a header line is rewritten to include a "phrase" part.
4636 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4637 buggy, causing it to skip the first lines of messages whose message ID
4638 ended in 'D'. This would not have bitten before Exim release 4.14, because
4639 message IDs were unlikely to end in 'D' before then. The effect was to have
4640 incorrect size information for certain domains.
4642 45. #include "config.h" was missing at the start of the crypt16.c module. This
4643 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4646 46. If there was a timeout during a "random" callout check, Exim treated it as
4647 a failure of the random address, and carried on sending RSET and the real
4648 address. If the delay was just some slowness somewhere, the response to the
4649 original RCPT would be taken as a response to RSET and so on, causing
4650 mayhem of various kinds.
4652 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4653 when I implemented it. It didn't allow for the fact that some option values
4654 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4655 the right test for positive values.
4657 48. Domain names in DNS records are case-independent. Exim always looks them up
4658 in lower case. Some resolvers return domain names in exactly the case they
4659 appear in the zone file, that is, they may contain uppercase letters. Not
4660 all resolvers do this - some return always lower case. Exim was treating a
4661 change of case by a resolver as a change of domain, similar to a widening
4662 of a domain abbreviation. This triggered its re-routing code and so it was
4663 trying to route what was effectively the same domain again. This normally
4664 caused routing to fail (because the router wouldn't handle the domain
4665 twice). Now Exim checks for this case specially, and just changes the
4666 casing of the domain that it ultimately uses when it transmits the message
4669 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4672 50. If a filter generated a file delivery with a non-absolute name (possible if
4673 no home directory exists for the router), the forbid_file option was not
4676 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4677 the existing equality matching.
4679 52. Exim was using ints instead of ino_t variables in some places where it was
4680 dealing with inode numbers.
4682 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4683 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4684 called TMPDIR, and if it finds it is different, it changes its value.
4686 54. The smtp_printf() function is now made available to local_scan() so
4687 additional output lines can be written before returning. There is also an
4688 smtp_fflush() function to enable the detection of a dropped connection.
4689 The variables smtp_input and smtp_batched_input are exported to
4692 55. Changed the default runtime configuration: the message "Unknown user"
4693 has been removed from the ACL, and instead placed on the localuser router,
4694 using the cannot_route_message feature. This means that any verification
4695 failures that generate their own messages won't get overridden. Similarly,
4696 the "Unrouteable address" message that was in the ACL for unverifiable
4697 relay addresses has also been removed.
4699 56. Added hosts_avoid_esmtp to the smtp transport.
4701 57. The exicyclog script was not checking for the esoteric option
4702 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4703 will work only if exicyclog is run under the appropriate euid.
4705 58. Following a discussion on the list, the rules by which Exim recognises line
4706 endings on incoming messages have been changed. The -dropcr and drop_cr
4707 options are now no-ops, retained only for backwards compatibility. The
4708 following line terminators are recognized: LF CRLF CR. However, special
4709 processing applies to CR:
4711 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4712 nor a local message in the state where . is a terminator.
4714 (ii) If a bare CR is encountered in a header line, an extra space is added
4715 after the line terminator so as not to end the header. The reasoning
4716 behind this is that bare CRs in header lines are most likely either
4717 to be mistakes, or people trying to play silly games.
4719 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4720 was being incorrectly given as 18 bytes larger than it should have been.
4721 This is a VOB (very old bug).
4723 60. This may never have affected anything current, but just in case it has:
4724 When the local host is found other than at the start of a list of hosts,
4725 the local host, those with the same MX, and any that follow, are discarded.
4726 When the list in question was part of a longer list of hosts, the following
4727 hosts (not currently being processed) were also being discarded. This no
4728 longer happens. I'm not sure if this situation could ever has previously
4731 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4734 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4735 header. This is something that is recommended in a new Internet Draft, and
4736 is something that is documented as being done by Sendmail. There are two
4737 possible values. For messages generated by the autoreply transport, Exim
4740 Auto-Submitted: auto-replied
4742 whereas for all other generated messages (e.g. bounces) it adds
4744 Auto-Submitted: auto-generated
4746 63. The "personal" condition in filters now includes a test for the
4747 Auto-Submitted: header. If it contains the string "auto-" the message it
4748 not considered personal.
4750 64. Added rcpt_include_affixes as a generic transport option.
4752 65. Added queue_only_override (default true).
4754 66. Added the syslog_duplication option.
4756 67. If what should have been the first header line of a message consisted of
4757 a space followed by a colon, Exim was mis-interpreting it as a header line.
4758 It isn't of course - it is syntactically invalid and should therefore be
4759 treated as the start of the message body. The misbehaviour could have
4760 caused a number of strange effects, including loss of data in subsequent
4761 header lines, and spool format errors.
4763 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4764 client host had authenticated. This control can now be exercised by an ACL
4765 for more flexibility.
4767 69. By default, callouts do not happen when testing with -bh. There is now a
4768 variant, -bhc, which does actually run the callout code, including
4769 consulting and updating the callout cache.
4771 70. Added support for saslauthd authentication, courtesy of Alexander
4774 71. If statvfs() failed on the spool or log directories while checking their
4775 size for availability, Exim confusingly gave the error "space shortage".
4776 Furthermore, in debugging mode it crashed with a floating point exception.
4777 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4778 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4779 serious problem, Exim now writes to the main and panic logs when this
4780 happens, with details of the failure. It then refuses to accept the
4781 incoming message, giving the message "spool directory problem" or "log
4782 directory problem" with a 421 code for SMTP messages.
4784 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4785 0, 1, and 2 exist, because some OS complain for execs without them (see
4786 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4787 descriptors. However, the code omitted to check that the open succeeded,
4788 causing mysterious errors if for some reason the permissions on /dev/null
4789 got screwed. Now Exim writes a message to the main and panic logs, and
4790 bombs out if it can't open /dev/null.
4792 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4793 interact so that it is all more flexible. It is supposed to remain
4794 backwards compatible. Also added extra_local_interfaces.
4796 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4797 to bomb out with an assertion failure - to the client this appears as a
4798 connection drop. This problem occurs in the part of the code that was taken
4799 from the Samba project. Fortunately, the assertion is in a very simple
4800 function, so I have fixed this by reproducing the function inline in the
4801 one place where it is called, and arranging for authentication to fail
4802 instead of killing the process with assert().
4804 75. The SPA client code was not working when the server requested OEM rather
4805 than Unicode encoding.
4807 76. Added code to make require_files with a specific uid setting more usable in
4808 the case where statting the file as root fails - usually a non-root-mounted
4809 NFS file system. When this happens and the failure is EACCES, Exim now
4810 forks a subprocess and does the per-uid checking as the relevant uid.
4812 77. Added process_log_path.
4814 78. If log_file_path was not explicitly set, a setting of check_log_space or
4815 check_log_inodes was ignored.
4817 79. If a space check for the spool or log partitions fails, the incident is now
4818 logged. Of course, in the latter case the data may get lost...
4820 80. Added the %p formatting code to string_format() so that it can be used to
4821 print addresses in debug_print(). Adjusted all the address printing in the
4822 debugging in store.c to use %p rather than %d.
4824 81. There was a concern that a line of code in smtp_in.c could overflow a
4825 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4826 initially expressed, the concern was not well-founded, because trailing
4827 spaces are removed early. However, if the trailing spaces were followed by
4828 a NULL, they did not get removed, so the overflow was possible. Two fixes
4831 (a) I re-wrote the offending code in a cleaner fashion.
4832 (b) If an incoming SMTP command contains a NULL character, it is rejected
4835 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4836 runs initgroups(), so that if the Exim user is in any additional groups,
4837 they will be used during message reception.
4843 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob