1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.547 2008/05/16 12:02:19 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TK/01 Added patch by Johannes Berg that expands the main option
10 "spamd_servers" if it starts with a dollar sign.
12 TK/02 Write list of recipients to X-Envelope-Sender header when building
13 the mbox-format spool file for content scanning (suggested by Jakob
16 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
17 (http://www.dcc-servers.net/) support via dccifd. Activated by
18 setting EXPERIMENTAL_DCC=yes in Local/Makefile. Check out
19 experimental_spec.txt for more documentation.
21 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
22 by Mark Daniel Reidel <mr@df.eu>.
24 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
25 When building exim an external PCRE library is now needed -
26 PCRE is a system library on the majority of modern systems.
27 See entry on PCRE_LIBS in EDITME file.
29 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
30 conversation. Added nologin parameter to request.
31 Patch contributed by Kirill Miazine
33 TF/01 Do not log submission mode rewrites if they do not change the address.
35 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
37 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
38 log files in place. Contributed by Roberto Lima
40 NM/04 Bugzilla 667: close socket used by dovecot authenticator
42 TF/03 Bugzilla 615: When checking the local_parts router precondition
43 after a local_part_suffix or local_part_prefix option, Exim now
44 does not use the address's named list lookup cache, since this
45 contains cached lookups for the whole local part.
47 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
48 Robert Millan. Documentation is in experimental-spec.txt
50 TF/04 Bugzilla 668: Fix parallel build (make -j).
52 NM/05 Bugzilla 437: Prevent Maildix aux files being created with mode 000
60 TK/01 Add preliminary DKIM support. Currently requires a forked version of
61 ALT-N's libdkim that I have put here:
62 http://duncanthrax.net/exim-experimental/
64 Note to Michael Haardt: I had to rename some vars in sieve.c. They
65 were called 'true' and it seems that C99 defines that as a reserved
66 keyword to be used with 'bool' variable types. That means you could
67 not include C99-style headers which use bools without triggering
68 build errors in sieve.c.
70 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
71 as mailq or other aliases. Changed the --help handling significantly
72 to do whats expected. exim_usage() emits usage/help information.
74 SC/01 Added the -bylocaldomain option to eximstats.
76 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
78 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
80 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
86 PH/01 Another patch from the Sieve maintainer.
88 PH/02 When an IPv6 address is converted to a string for single-key lookup
89 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
90 dots are used instead of colons so that keys in lsearch files need not
91 contain colons. This was done some time before quoting was made available
92 in lsearch files. However, iplsearch files do require colons in IPv6 keys
93 (notated using the quote facility) so as to distinguish them from IPv4
94 keys. This meant that lookups for IP addresses in host lists did not work
95 for iplsearch lookups.
97 This has been fixed by arranging for IPv6 addresses to be expressed with
98 colons if the lookup type is iplsearch. This is not incompatible, because
99 previously such lookups could never work.
101 The situation is now rather anomolous, since one *can* have colons in
102 ordinary lsearch keys. However, making the change in all cases is
103 incompatible and would probably break a number of configurations.
105 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
108 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
109 conversion specification without a maximum field width, thereby enabling
110 a rogue spamd server to cause a buffer overflow. While nobody in their
111 right mind would setup Exim to query an untrusted spamd server, an
112 attacker that gains access to a server running spamd could potentially
113 exploit this vulnerability to run arbitrary code as the Exim user.
115 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
116 $primary_hostname instead of what libspf2 thinks the hosts name is.
118 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
119 a directory entry by the name of the lookup key. Previously, if a
120 symlink pointed to a non-existing file or a file in a directory that
121 Exim lacked permissions to read, a lookup for a key matching that
122 symlink would fail. Now it is enough that a matching directory entry
123 exists, symlink or not. (Bugzilla 503.)
125 PH/03 The body_linecount and body_zerocount variables are now exported in the
128 PH/04 Added the $dnslist_matched variable.
130 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
131 This means they are set thereafter only if the connection becomes
134 PH/06 Added the client_condition to authenticators so that some can be skipped
135 by clients under certain conditions.
137 PH/07 The error message for a badly-placed control=no_multiline_responses left
138 "_responses" off the end of the name.
140 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
142 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
143 (without spaces) instead of just copying the configuration text.
145 PH/10 Added the /noupdate option to the ratelimit ACL condition.
147 PH/11 Added $max_received_linelength.
149 PH/12 Added +ignore_defer and +include_defer to host lists.
151 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
152 way in which PCRE > 7.0 is built.
154 PH/14 Implemented queue_only_load_latch.
156 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
157 MAIL command. The effect was to mangle the value on 64-bit systems.
159 PH/16 Another patch from the Sieve maintainer.
161 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
163 PH/18 If a system quota error occurred while trying to create the file for
164 a maildir delivery, the message "Mailbox is full" was not appended to the
165 bounce if the delivery eventually timed out. Change 4.67/27 below applied
166 only to a quota excession during the actual writing of the file.
168 PH/19 It seems that peer DN values may contain newlines (and other non-printing
169 characters?) which causes problems in log lines. The DN values are now
170 passed through string_printing() before being added to log lines.
172 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
173 and InterBase are left for another time.)
175 PH/21 Added message_body_newlines option.
177 PH/22 Guard against possible overflow in moan_check_errorcopy().
179 PH/23 POSIX allows open() to be a macro; guard against that.
181 PH/24 If the recipient of an error message contained an @ in the local part
182 (suitably quoted, of course), incorrect values were put in $domain and
183 $local_part during the evaluation of errors_copy.
189 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
190 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
193 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
194 issue a MAIL command.
196 PH/02 In an ACL statement such as
198 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
200 if a client was not listed at all, or was listed with a value other than
201 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
202 the condition was not true (as it should be), so access was not denied.
203 The bug was that the ! inversion was incorrectly passed on to the second
204 item. This has been fixed.
206 PH/03 Added additional dnslists conditions == and =& which are different from
207 = and & when the dns lookup returns more than one IP address.
209 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
210 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
212 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
213 FSYNC, which compiles an option called disable_fsync that allows for
214 bypassing fsync(). The documentation is heavily laced with warnings.
216 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
218 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
219 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
220 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
221 including adding "make clean"; (3) Added -fPIC when compiling the test
222 dynamically loaded module, to get rid of a warning.
224 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
225 message fails, move_frozen_messages = true and ignore_bounce_errors_after
226 = 0s. The bug is otherwise harmless.
228 PH/07 There was a bug in the dovecot authenticator such that the value of
229 $auth1 could be overwritten, and so not correctly preserved, after a
230 successful authentication. This usually meant that the value preserved by
231 the server_setid option was incorrect.
233 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
235 PH/09 Installed PCRE release 7.0.
237 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
238 run for batched SMTP input. It is now run at the start of every message
239 in the batch. While fixing this I discovered that the process information
240 (output by running exiwhat) was not always getting set for -bs and -bS
241 input. This is fixed, and it now also says "batched" for BSMTP.
243 PH/11 Added control=no_pipelining.
245 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
246 patch, slightly modified), and move the expansion of helo_data till after
247 the connection is made in the smtp transport (so it can use these
250 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
252 PH/14 Added log_selector = +pid.
254 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
256 PH/16 Add ${if forany and ${if forall.
258 PH/17 Added dsn_from option to vary the From: line in DSNs.
260 PH/18 Flush SMTP output before performing a callout, unless control =
261 no_callout_flush is set.
263 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
264 was true (the default) a successful delivery failed to delete the retry
265 item, thus causing premature timeout of the address. The bug is now
268 PH/20 Added hosts_avoid_pipelining to the smtp transport.
270 PH/21 Long custom messages for fakedefer and fakereject are now split up
271 into multiline reponses in the same way that messages for "deny" and
272 other ACL rejections are.
274 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
275 with slight modification.
277 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
278 draft, changing the syntax and factoring some duplicate code".
280 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
281 for deliveries of the second and subsequent messages over the same SMTP
284 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
285 ${reduce, with only minor "tidies".
287 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
289 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
290 expansion side effects.
292 PH/27 When a message times out after an over-quota error from an Exim-imposed
293 quota, the bounce message says "mailbox is full". This message was not
294 being given when it was a system quota that was exceeded. It now should
297 MH/03 Made $recipients available in local_scan(). local_scan() already has
298 better access to the recipient list through recipients_list[], but
299 $recipients can be useful in postmaster-provided expansion strings.
301 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
302 in the case of a MAIL command with additional options following the
303 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
304 were accidentally chopped off.
306 PH/29 SMTP synchronization checks are implemented when a command is read -
307 there is a check that no more input is waiting when there shouldn't be
308 any. However, for some commands, a delay in an ACL can mean that it is
309 some time before the response is written. In this time, more input might
310 arrive, invalidly. So now there are extra checks after an ACL has run for
311 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
312 pipelining has not been advertised.
314 PH/30 MH's patch to allow iscntrl() characters to be list separators.
316 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
317 returned in the SMTP response when smtp_return_error_details was false.
320 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
321 instead of the C I/O that was originally supplied, because problems were
324 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
325 Exim which did not show up earlier: it was assuming that a call to
326 SSL_CTX_set_info_callback() might give an error value. In fact, there is
327 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
328 was a macro that became an assignment, so it seemed to work. This has
329 changed to a proper function call with a void return, hence the compile
330 error. Exim's code has been fixed.
332 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
335 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
337 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
339 PH/37 If a message is not accepted after it has had an id assigned (e.g.
340 because it turns out to be too big or there is a timeout) there is no
341 "Completed" line in the log. When some messages of this type were
342 selected by exigrep, they were listed as "not completed". Others were
343 picked up by some special patterns. I have improved the selection
344 criteria to be more general.
346 PH/38 The host_find_failed option in the manualroute router can now be set
347 to "ignore", to completely ignore a host whose IP address cannot be
348 found. If all hosts are ignored, the behaviour is controlled by the new
349 host_all_ignored option.
351 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
352 homing or because of multiple MX records with /mx) generated more than
353 one IP address, and the following item turned out to be the local host,
354 all the secondary addresses of the first item were incorrectly removed
355 from the list, along with the local host and any following hosts (which
356 is what is supposed to happen).
358 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
359 whoever called Exim into the -H file. In the case of the daemon it was
360 behaving confusingly. When first started, it used values for whoever
361 started the daemon, but after a SIGHUP it used the Exim user (because it
362 calls itself on a restart). I have changed the code so that it now always
365 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
366 message are rejected with the same error (e.g. no authentication or bad
367 sender address), and a DATA command is nevertheless sent (as can happen
368 with PIPELINING or a stupid MUA), the error message that was given to the
369 RCPT commands is included in the rejection of the DATA command. This is
370 intended to be helpful for MUAs that show only the final error to their
373 PH/42 Another patch from the Sieve maintainer.
375 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
376 Eximstats - Fixed some broken HTML links and added missing column headers
378 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
379 columns for Rejects, Temp Rejects, Ham, and Spam rows.
381 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
383 PH/43 Yet another patch from the Sieve maintainer.
385 PH/44 I found a way to check for a TCP/IP connection going away before sending
386 the response to the final '.' that terminates a message, but only in the
387 case where the client has not sent further data following the '.'
388 (unfortunately, this is allowed). However, in many cases there won't be
389 any further data because there won't be any more messages to send. A call
390 to select() can be used: if it shows that the input is "ready", there is
391 either input waiting, or the socket has been closed. An attempt to read
392 the next input character can distinguish the two cases. Previously, Exim
393 would have sent an OK response which the client would never have see.
394 This could lead to message repetition. This fix should cure that, at
395 least in a lot of common cases.
397 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
398 advertised in response to EHLO.
404 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
405 fixed by 4.65/MH/01 (is this a record?) are fixed:
407 (i) An empty string was always treated as zero by the numeric comparison
408 operators. This behaviour has been restored.
410 (ii) It is documented that the numeric comparison operators always treat
411 their arguments as decimal numbers. This was broken in that numbers
412 starting with 0 were being interpreted as octal.
414 While fixing these problems I realized that there was another issue that
415 hadn't been noticed. Values of message_size_limit (both the global option
416 and the transport option) were treated as octal if they started with 0.
417 The documentation was vague. These values are now always treated as
418 decimal, and I will make that clear in the documentation.
424 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
425 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
428 MH/01 Don't check that the operands of numeric comparison operators are
429 integers when their expansion is in "skipping" mode (fixes bug
430 introduced by 4.64-PH/07).
432 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
433 child addresses, Exim now panics and dies. Previously, because the count
434 is held in a short int, deliveries were likely to be lost. As such a
435 large number of recipients for a single message is ridiculous
436 (performance will be very, very poor), I have chosen to impose a limit
437 rather than extend the field.
443 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
444 leftover -K file (the existence of which was triggered by #402).
445 While we were at it, introduced process PID as part of the -K
446 filename. This should rule out race conditions when creating
449 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
450 processing considerably. Previous code took too long for large mails,
451 triggering a timeout which in turn triggers #401.
453 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
454 in the DK code in transports.c. sendfile() is not really portable,
455 hence the _LINUX specificness.
457 TF/01 In the add_headers option to the mail command in an Exim filter,
458 there was a bug that Exim would claim a syntax error in any
459 header after the first one which had an odd number of characters
462 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
463 callout verification, Exim cached a "reject" for the entire domain. This
464 is correct for most verifications, but it is not correct for a recipient
465 verification with use_sender or use_postmaster set, because in that case
466 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
467 case of MAIL FROM:<> rejection from other early rejections (e.g.
468 rejection of HELO). When verifying a recipient using a non-null MAIL
469 address, the cache is ignored if it shows MAIL FROM:<> rejection.
470 Whatever the result of the callout, the value of the domain cache is
471 left unchanged (for any other kind of callout, getting as far as trying
472 RCPT means that the domain itself is ok).
474 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
477 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
478 manifest itself as EPIPE rather than ECONNECT. When tidying away a
479 session, the daemon ignores ECONNECT errors and logs others; it now
480 ignores EPIPE as well.
482 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
483 (quoted-printable decoding).
485 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
486 later the small subsequent patch to fix an introduced bug.
488 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
490 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
492 PH/08 An error is now given if message_size_limit is specified negative.
494 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
495 to be given (somewhat) arbitrary names.
497 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
500 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
501 miscellaneous code fixes
503 PH/10 Added the log_reject_target ACL modifier to specify where to log
506 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
507 hostname. This is wrong, because it relates to the incoming message (and
508 probably the interface on which it is arriving) and not to the outgoing
509 callout (which could be using a different interface). This has been
510 changed to use the value of the helo_data option from the smtp transport
511 instead - this is what is used when a message is actually being sent. If
512 there is no remote transport (possible with a router that sets up host
513 addresses), $smtp_active_hostname is used.
515 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
516 tweaks were necessary in order to get it to work (see also 21 below):
517 (a) The code assumed that strncpy() returns a negative number on buffer
518 overflow, which isn't the case. Replaced with Exim's string_format()
520 (b) There were several signed/unsigned issues. I just did the minimum
521 hacking in of casts. There is scope for a larger refactoring.
522 (c) The code used strcasecmp() which is not a standard C function.
523 Replaced with Exim's strcmpic() function.
524 (d) The code set only $1; it now sets $auth1 as well.
525 (e) A simple test gave the error "authentication client didn't specify
526 service in request". It would seem that Dovecot has changed its
527 interface. Fortunately there's a specification; I followed it and
528 changed what the client sends and it appears to be working now.
530 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
533 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
534 address A is aliased to B and C, where B exists and C does not. Without
535 -v the output is "A verified" because verification stops after a
536 successful redirection if more than one address is generated. However,
537 with -v the child addresses are also verified. Exim was outputting "A
538 failed to verify" and then showing the successful verification for C,
539 with its parentage. It now outputs "B failed to verify", showing B's
540 parentage before showing the successful verification of C.
542 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
543 look up a TXT record in a specific list after matching in a combined
546 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
547 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
548 they consult the DNS. I had assumed they would set it the way they
549 wanted; and indeed my experiments on Linux seem to show that in some
550 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
551 To be on the safe side, however, I have now made the interface to
552 host_find_byname() similar to host_find_bydns(), with an argument
553 containing the DNS resolver options. The host_find_byname() function now
554 sets these options at its start, just as host_find_bydns() does. The smtp
555 transport options dns_qualify_single and dns_search_parents are passed to
556 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
557 of host_find_byname() use the default settings of RES_DEFNAMES
558 (qualify_single) but not RES_DNSRCH (search_parents).
560 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
561 spool_read_header() do less string testing, by means of a preliminary
562 switch on the second character of optional "-foo" lines. (This is
563 overdue, caused by the large number of possibilities that now exist.
564 Originally there were few.) While I was there, I also converted the
565 str(n)cmp tests so they don't re-test the leading "-" and the first
566 character, in the hope this might squeeze out yet more improvement.
568 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
569 flag allowing group syntax was set by the header_syntax check but not
570 turned off, possible causing trouble later; (2) The flag was not being
571 set at all for the header_verify test, causing "group"-style headers to
572 be rejected. I have now set it in this case, and also caused header_
573 verify to ignore an empty address taken from a group. While doing this, I
574 came across some other cases where the code for allowing group syntax
575 while scanning a header line wasn't quite right (mostly, not resetting
576 the flag correctly in the right place). These bugs could have caused
577 trouble for malformed header lines. I hope it is now all correct.
579 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
580 with the "reply" argument non-NULL. The code, however (which originally
581 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
582 but it didn't always do it. This confused somebody who was copying the
583 code for some other use. I have removed all the tests.
585 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
586 feature that was used to support insecure browsers during the U.S. crypto
587 embargo. It requires special client support, and Exim is probably the
588 only MTA that supported it -- and would never use it because real RSA is
589 always available. This code has been removed, because it had the bad
590 effect of slowing Exim down by computing (never used) parameters for the
591 RSA_EXPORT functionality.
593 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
594 authenticator to fail if there's a tab character in the incoming data
595 (there should never be unless someone is messing about, as it's supposed
596 to be base64-encoded). Also added, on Timo's advice, the "secured" option
597 if the connection is using TLS or if the remote IP is the same as the
598 local IP, and the "valid-client-cert option" if a client certificate has
601 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
602 authenticators. This can be used for authorization after authentication
603 succeeds. (In the case of plaintext, it servers for both authentication
606 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
607 if any retry times were supplied.
609 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
610 connection, where there is no client IP address to check. In this
611 situation, the verify now always succeeds.
613 PH/25 Applied John Jetmore's -Mset patch.
615 PH/26 Added -bem to be like -Mset, but loading a message from a file.
617 PH/27 In a string expansion for a processed (not raw) header when multiple
618 headers of the same name were present, leading whitespace was being
619 removed from all of them, but trailing whitespace was being removed only
620 from the last one. Now trailing whitespace is removed from each header
621 before concatenation. Completely empty headers in a concatenation (as
624 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
625 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
627 PH/29 [Removed. This was a change that I later backed out, and forgot to
628 correct the ChangeLog entry (that I had efficiently created) before
629 committing the later change.]
631 PH/30 Exim was sometimes attempting to deliver messages that had suffered
632 address errors (4xx response to RCPT) over the same connection as other
633 messages routed to the same hosts. Such deliveries are always "forced",
634 so retry times are not inspected. This resulted in far too many retries
635 for the affected addresses. The effect occurred only when there were more
636 hosts than the hosts_max_try setting in the smtp transport when it had
637 the 4xx errors. Those hosts that it had tried were not added to the list
638 of hosts for which the message was waiting, so if all were tried, there
639 was no problem. Two fixes have been applied:
641 (i) If there are any address or message errors in an SMTP delivery, none
642 of the hosts (tried or untried) are now added to the list of hosts
643 for which the message is waiting, so the message should not be a
644 candidate for sending over the same connection that was used for a
645 successful delivery of some other message. This seems entirely
646 reasonable: after all the message is NOT "waiting for some host".
647 This is so "obvious" that I'm not sure why it wasn't done
648 previously. Hope I haven't missed anything, but it can't do any
649 harm, as the worst effect is to miss an optimization.
651 (ii) If, despite (i), such a delivery is accidentally attempted, the
652 routing retry time is respected, so at least it doesn't keep
653 hammering the server.
655 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
656 in ${readsocket because some servers need this prod.
658 PH/32 Added some extra debug output when updating a wait-xxx database.
660 PH/33 The hint "could be header name not terminated by colon", which has been
661 given for certain expansion errors for a long time, was not being given
662 for the ${if def:h_colon_omitted{... case.
664 PH/34 The spec says: "With one important exception, whenever a domain list is
665 being scanned, $domain contains the subject domain." There was at least
666 one case where this was not true.
668 PH/35 The error "getsockname() failed: connection reset by peer" was being
669 written to the panic log as well as the main log, but it isn't really
670 panic-worthy as it just means the connection died rather early on. I have
671 removed the panic log writing for the ECONNRESET error when getsockname()
674 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
675 runs only) independently of the message's sender address. This meant
676 that, if the 4xx error was in fact related to the sender, a different
677 message to the same recipient with a different sender could confuse
678 things. In particualar, this can happen when sending to a greylisting
679 server, but other circumstances could also provoke similar problems.
680 I have changed the default so that the retry time for these errors is now
681 based a combination of the sender and recipient addresses. This change
682 can be overridden by setting address_retry_include_sender=false in the
685 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
686 remote server are returned as part of bounce messages. This was not
687 happening for LMTP over a pipe (the lmtp transport), but now it is the
688 same for both kinds of LMTP.
690 PH/38 Despite being documented as not happening, Exim was rewriting addresses
691 in header lines that were in fact CNAMEs. This is no longer the case.
693 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
694 and queue runs started by the daemon processed all messages. This has
695 been fixed so that -R and -S can now usefully be given with -q<time>.
697 PH/40 Import PCRE release 6.7 (fixes some bugs).
699 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
701 PH/42 Give an error if -q is specified more than once.
703 PH/43 Renamed the variables $interface_address and $interface_port as
704 $received_ip_address and $received_port, to make it clear that these
705 values apply to message reception, and not to the outgoing interface when
706 a message is delivered. (The old names remain recognized, of course.)
708 PH/44 There was no timeout on the connect() call when using a Unix domain
709 socket in the ${readsocket expansion. There now is.
711 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
712 be meaningful with "accept".
714 SC/01 Eximstats V1.43
715 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
717 SC/02 Eximstats V1.44
718 Use a glob alias rather than an array ref in the generated
719 parser. This improves both readability and performance.
721 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
722 Collect SpamAssassin and rejection statistics.
723 Don't display local sender or destination tables unless
724 there is data to show.
725 Added average volumes into the top table text output.
727 SC/04 Eximstats V1.46
728 Collect data on the number of addresses (recipients)
729 as well as the number of messages.
731 SC/05 Eximstats V1.47
732 Added 'Message too big' to the list of mail rejection
733 reasons (thanks to Marco Gaiarin).
735 SC/06 Eximstats V1.48
736 Mainlog lines which have GMT offsets and are too short to
737 have a flag are now skipped.
739 SC/07 Eximstats V1.49 (Alain Williams)
740 Added the -emptyok flag.
742 SC/08 Eximstats V1.50
743 Fixes for obtaining the IP address from reject messages.
745 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
746 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
747 whitesspace changes from 4.64-PH/27
749 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
752 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
753 are found, allow negative numbers in numeric criteria)
755 JJ/06 exipick.20061117.2, added new $message_body_missing variable
757 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
758 to match changes made in 4.64-PH/43
760 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
762 PH/47 Put in an explicit test for a DNS lookup of an address record where the
763 "domain" is actually an IP address, and force a failure. This locks out
764 those revolvers/nameservers that support "A-for-A" lookups, in
765 contravention of the specifications.
767 PH/48 When a host name was looked up from an IP address, and the subsequent
768 forward lookup of the name timed out, the host name was left in
769 $sender_host_name, contrary to the specification.
771 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
772 restricted to single-key lookups, Exim was not diagnosing an error if
773 * or *@ was used with a query-style lookup.
775 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
777 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
778 long ago, but noone interested enough thought of it. Let's just say that
779 the "1.1" means that there are some new functions that weren't there at
780 some point in the past.
782 PH/51 Error processing for expansion failure of helo_data from an smtp
783 transport during callout processing was broken.
785 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
786 tested/used via the -bh/-bhc/-bs options.
788 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
789 bug, fixed in subsequent PCRE releases).
791 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
792 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
794 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
800 SC/01 Use a glob alias rather than an array ref in eximstats generated
801 parser. This improves both readability and performance.
803 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
804 Don't display local sender or destination tables in eximstats unless
805 there is data to show.
806 Added average volumes into the eximstats top table text output.
808 SC/03 Collect data on the number of addresses (recipients) as well
809 as the number of messages in eximstats.
811 TF/01 Correct an error in the documentation for the redirect router. Exim
812 does (usually) call initgroups() when daemonizing.
814 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
815 with consistent privilege compared to when running as a daemon.
817 TF/03 Note in the spec that $authenticated_id is not set for local
818 submissions from trusted users.
820 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
821 Thanks to Dean Brooks <dean@iglou.com> for the patch.
823 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
824 by adding some example configuration directives to the default
825 configuration file. A little bit of work is required to uncomment the
826 directives and define how usernames and passwords are checked, but
827 there is now a framework to start from.
829 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
830 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
831 without this. I don't know how relevant this is to other LDAP libraries.
833 PH/02 Add the verb name to the "unknown ACL verb" error.
835 PH/03 Magnus Holmgren's patch for filter_prepend_home.
837 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
839 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
840 directory not expanded when it should be if an expanded home directory
841 was set for the address (which is overridden by the transport).
843 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
846 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
847 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
848 because it is too late at that time, and has no effect.
850 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
851 security issue with \' (bugzilla #107). I could not use the
852 PQescapeStringConn() function, because it needs a PGconn value as one of
855 PH/08 When testing addresses using -bt, indicate those final addresses that
856 are duplicates that would not cause an additional delivery. At least one
857 person was confused, thinking that -bt output corresponded to deliveries.
858 (Suppressing duplicates isn't a good idea as you lose the information
859 about possibly different redirections that led to the duplicates.)
861 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
862 systems where poll() doesn't work, in particular OS X.
864 PH/10 Added more information to debugging output for retry time not reached.
866 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
867 operations in malware.c.
869 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
872 PH/13 If write_rejectlog was set false when logging was sent to syslog with
873 syslog_duplication set false, log lines that would normally be written
874 both the the main log and to the reject log were not written to syslog at
877 PH/14 In the default configuration, change the use of "message" in ACL warn
878 statements to "add_header".
880 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
881 not followed by a command (e.g. "seen endif").
883 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
884 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
887 PH/17 Added extra conditions to the default value of delay_warning_condition
891 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
892 { match{$h_precedence:}{(?i)bulk|list|junk} } \
893 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
896 The Auto-Submitted: and various List- headers are standardised, whereas I
897 don't think Precedence: ever was.
899 PH/18 Refactored debugging code in route_finduser() to show more information,
900 in particular, the error code if getpwnam() issues one.
902 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
903 This is apparently needed in addition to the PH/07 change above to avoid
904 any possible encoding problems.
906 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
907 but not after initializing Perl.
909 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
910 output them only if debugging. By default they are written stderr,
911 apparently, which is not desirable.
913 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
916 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
919 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
921 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
922 authenticated or an ident call has been made. Suppress the default
923 values for $authenticated_id and $authenticated_sender (but permit -oMai
924 and -oMas) when testing with -bh.
926 PH/24 Re-jigged the order of the tests in the default configuration so that the
927 tests for valid domains and recipients precede the DNS black list and CSA
928 tests, on the grounds that those ones are more expensive.
930 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
931 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
932 This bug exists in every version of Exim that I still have, right back to
935 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
936 However, an attempt to turn on case-sensitivity in a regex key by
937 including (?-i) didn't work because the subject string was already
938 lowercased, and the effects were non-intuitive. It turns out that a
939 one-line patch can be used to allow (?-i) to work as expected.
945 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
946 other effects) broke the use of negated acl sub-conditions.
948 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
951 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
952 "Deny" causes Exim to reject the incoming connection with a 554 error.
953 Unfortunately, if there is a major crisis, such as a disk failure,
954 tcp-wrappers gives "deny", whereas what one would like would be some
955 kind of temporary error. A kludge has been added to help with this.
956 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
957 554 error is used if errno is still zero or contains ENOENT (which occurs
958 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
961 PH/03 Add -lutil to the default FreeBSD LIBS setting.
963 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
964 errors. Otherwise a message that provokes a temporary error (when other
965 messages do not) can cause a whole host to time out.
967 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
968 addresses were routed directly to files or pipes from a redirect router.
969 File deliveries just didn't batch; pipe deliveries might have suffered
972 PH/06 A failure to get a lock for a hints database would erroneously always say
973 "Failed to get write lock", even when it was really a read lock.
975 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
976 of 0600. This has been changed to use the value of the lockfile_mode
977 option (which defaults to 0600).
979 PH/08 Applied small patch from the Sieve maintainer.
981 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
982 folder from quota calculations, a direct delivery into this folder messed
983 up the contents of the maildirsize file. This was because the regex was
984 used only to exclude .Trash (or whatever) when the size of the mailbox
985 was calculated. There was no check that a delivery was happening into an
986 excluded directory. This bug has been fixed by ignoring all quota
987 processing for deliveries into excluded directories.
989 PH/10 Added the maildirfolder_create_regex option to appendfile.
995 PH/01 The code for finding all the local interface addresses on a FreeBSD
996 system running IPv6 was broken. This may well have applied to all BSD
997 systems, as well as to others that have similar system calls. The broken
998 code found IPv4 interfaces correctly, but gave incorrect values for the
999 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1000 that it would not match correctly against @[] and not recognize the IPv6
1003 PH/02 The ipliteral router was not recognizing addresses of the form user@
1004 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1006 PH/03 Added disable_ipv6.
1008 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1009 decoded form, because it is most often used to construct To: headers
1010 lines in autoreplies, and the decoded form may well be syntactically
1011 invalid. However, $reply_address has leading white space removed, and all
1012 newlines turned into spaces so that the autoreply transport does not
1015 PH/05 If group was specified without a user on a router, and no group or user
1016 was specified on a transport, the group from the router was ignored.
1018 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1019 for visible compile-time settings that can be used to change these
1020 numbers, for those that want even more. Backwards compatibility with old
1021 spool files has been maintained. However, going back to a previous Exim
1022 release will lost any variables that are in spool files.
1024 PH/07 Two small changes when running in the test harness: increase delay when
1025 passing a TCP/IP connection to a new process, in case the original
1026 process has to generate a bounce, and remove special handling of
1027 127.0.0.2 (sic), which is no longer necessary.
1029 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1030 be the same on different OS.
1032 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1035 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1036 whether --show-vars was specified or not
1038 JJ/02 exipick: Added support for new ACL variable spool format introduced
1041 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1042 syntactically invalid From: or Reply-to: line, and a filter used this to
1043 generate an autoreply, and therefore failed to obtain an address for the
1044 autoreply, Exim could try to deliver to a non-existent relative file
1045 name, causing unrelated and misleading errors. What now happens is that
1046 it logs this as a hard delivery error, but does not attempt to create a
1049 PH/11 The exinext utility has a -C option for testing purposes, but although
1050 the given file was scanned by exinext itself; it wasn't being passed on
1051 when Exim was called.
1053 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1054 an end-of-file indication when reading a command response.
1056 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1057 compiled. In many other places in Exim, IPv6 addresses are always
1058 recognized, so I have changed this. It also means that IPv4 domain
1059 literals of the form [IPV4:n.n.n.n] are now always recognized.
1061 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1062 used if the router is not running as root, for example, when verifying at
1063 ACL time, or when using -bh. The debugging output from this situation was
1064 non-existent - all you got was a failure to exec. I have made two
1067 (a) Failures to set uid/gid, the current directory, or a process leader
1068 in a subprocess such as that created by queryprogram now generate
1069 suitable debugging ouput when -d is set.
1071 (b) The queryprogram router detects when it is not running as root,
1072 outputs suitable debugging information if -d is set, and then runs
1073 the subprocess without attempting to change uid/gid.
1075 PH/15 Minor change to Makefile for building test_host (undocumented testing
1078 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1079 additional section of a DNS packet that returns MX or SRV records.
1080 Instead, it always explicitly searches for A/AAAA records. This avoids
1081 major problems that occur when a DNS server includes only records of one
1082 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1083 fixed another bug: if SRV records were looked up and the corresponding
1084 address records were *not* found in the additional section, the port
1085 values from the SRV records were lost.
1087 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1088 using the correct key (the original address) when searching the retry
1089 rules in order to find which one to use for generating the retry hint.
1091 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1092 adding the default one. Similarly, if it contains a Reply-To: header, the
1093 errors_reply_to option, if set, is not used.
1095 PH/19 When calculating a retry time, Exim used to measure the "time since
1096 failure" by looking at the "first failed" field in the retry record. Now
1097 it does not use this if it is later than than the arrival time of the
1098 message. Instead it uses the arrival time. This makes for better
1099 behaviour in cases where some deliveries succeed, thus re-setting the
1100 "first failed" field. An example is a quota failure for a huge message
1101 when small messages continue to be delivered. Without this change, the
1102 "time since failure" will always be short, possible causing more frequent
1103 delivery attempts for the huge message than are intended.
1104 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1106 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1107 $1, $2, $3) because the numerical variables can be reset during some
1108 expansion items (e.g. "match"), thereby losing the authentication data.
1110 PH/21 Make -bV show the size of off_t variables so that the test suite can
1111 decide whether to run tests for quotas > 2G.
1113 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1114 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1115 filecount value is greater than 2G or if a quota value is greater than 2G
1116 on a system where the size of off_t is not greater than 4, a panic error
1119 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1120 never match. The debug and -bh output now contains an explicit error
1121 message indicating a malformed IPv4 address or mask.
1123 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1124 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1125 PH/23 above applies.
1127 PH/25 Do not write to syslog when running in the test harness. The only
1128 occasion when this arises is a failure to open the main or panic logs
1129 (for which there is an explicit test).
1131 PH/26 Added the /no_tell option to "control=freeze".
1133 PH/27 If a host name lookup failed very early in a connection, for example, if
1134 the IP address matched host_lookup and the reverse lookup yielded a name
1135 that did not have a forward lookup, an error message of the form "no IP
1136 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1137 could be logged. Now it outputs the IP address instead of "NULL".
1139 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1140 allows the sender and the authenticated sender to be set when
1141 submitting a message from within Exim. Since child_open_exim() is
1142 documented for local_scan(), the new function should be too.
1144 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1145 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1146 results in an empty string is now treated as unset.
1148 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1150 PH/31 Added sender_verify_fail logging option.
1152 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1153 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1154 tidied the source and removed it altogether.
1156 PH/33 When a queue run was abandoned because the load average was too high, a
1157 log line was always written; now it is written only if the queue_run log
1158 selector is set. In addition, the log line for abandonment now contains
1159 information about the queue run such as the pid. This is always present
1160 in "start" and "stop" lines but was omitted from the "abandon" line.
1162 PH/34 Omit spaces between a header name and the colon in the error message that
1163 is given when verify = headers_syntax fails (if there are lots of them,
1164 the message gets confusing).
1166 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1167 names, as there are now some PTR records that contain slashes. This check
1168 is only to protect against broken name servers that fall over on strange
1169 characters, so the fact that it applies to all lookups doesn't matter.
1171 PH/36 Now that the new test suite is complete, we can remove some of the
1172 special code in Exim that was needed for the old test suite. For example,
1173 sorting DNS records because real resolvers return them in an arbitrary
1174 order. The new test suite's fake resolver always returns records in the
1177 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1178 bounces) except when queue_only is set, to avoid logging races between
1179 the different processes.
1181 PH/38 Panic-die if .include specifies a non-absolute path.
1183 PH/39 A tweak to the "H" retry rule from its user.
1185 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1186 a label. They prevented compilation on older perls.
1188 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1189 a warning to be raised on newish perls.
1191 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1192 on queue. Changes to match documented behaviour of showing count of
1193 messages matching specified criteria.
1195 PH/40 Changed the default ident timeout from 30s to 5s.
1197 PH/41 Added support for the use of login_cap features, on those BSD systems
1198 that have them, for controlling the resources used by pipe deliveries.
1200 PH/42 The content-scanning code uses fopen() to create files in which to put
1201 message data. Previously it was not paying any attention to the mode of
1202 the files. Exim runs with umask(0) because the rest of the code creates
1203 files with open(), and sets the required mode explicitly. Thus, these
1204 files were ending up world-writeable. This was not a big issue, because,
1205 being within the spool directory, they were not world-accessible. I have
1206 created a function called modefopen, which takes an additional mode
1207 argument. It sets umask(777), creates the file, chmods it to the required
1208 mode, then resets the umask. All the relevant calls to fopen() in the
1209 content scanning code have been changed to use this function.
1211 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1212 to 24 hours. This avoids potential overflow problems when processing G
1213 and H retry rules. I suspect nobody ever tinkers with this value.
1215 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1217 PH/45 When the plaintext authenticator is running as a client, the server's
1218 challenges are checked to ensure they are valid base64 strings. By
1219 default, the authentication attempt is cancelled if an invalid string is
1220 received. Setting client_ignore_invalid_base64 true ignores these errors.
1221 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1222 they are received. Thus, the responses can be made to depend on the
1223 challenges. If an invalid string is ignored, an empty string is placed in
1226 PH/46 Messages that are created by the autoreply transport now contains a
1227 References: header, in accordance with RFCs 2822 and 3834.
1229 PH/47 Added authenticated_sender_force to the smtp transport.
1231 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1233 PH/49 Installed latest patch from the Sieve maintainer.
1235 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1236 was also set, the appendfile transport was unnecessarily scanning a
1237 directory of message files (e.g. for maildir delivery) to find the count
1238 of files (along with the size), even though it did not need this
1239 information. It now does the scan only if it needs to find either the
1240 size of the count of files.
1242 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1244 PH/52 Two bugs concerned with error handling when the smtp transport is
1247 (i) Exim was not creating retry information for temporary errors given
1248 for individual recipients after the DATA command when the smtp transport
1249 was used in LMTP mode. This meant that they could be retried too
1250 frequently, and not timed out correctly.
1252 (ii) Exim was setting the flag that allows error details to be returned
1253 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1254 recipients that were returned after the DATA command.
1256 PH/53 This is related to PH/52, but is more general: for any failing address,
1257 when detailed error information was permitted to be returned to the
1258 sender, but the error was temporary, then after the final timeout, only
1259 "retry timeout exceeded" was returned. Now it returns the full error as
1260 well as "retry timeout exceeded".
1262 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1263 do this, and (what is worse) MTAs that accept it.
1265 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1266 will now be deprecated.
1268 PH/56 New os.c-cygwin from the Cygwin maintainer.
1270 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1271 formats (previously only available in exim formats via -bpr, -bpru,
1272 and -bpra. Now also available in native and exiqgrep formats)
1274 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1275 with very large, slow to parse queues
1277 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1279 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1281 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1282 responses to authentication challenges, though it was showing the
1283 challenges; (ii) I've removed the CR characters from the debug output for
1286 PH/58 Allow for the insertion of a newline as well as a space when a string
1287 is turned into more than one encoded-word during RFC 2047 encoding. The
1288 Sieve code now uses this.
1290 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1291 data_4xx, lost_connection, tls_required.
1293 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1294 message was being sent as an SMTP response.
1296 PH/61 Add -l and -k options to exicyclog.
1298 PH/62 When verifying, if an address was redirected to one new address, so that
1299 verification continued, and the new address failed or deferred after
1300 having set something in $address_data, the value of $address_data was not
1301 passed back to the ACL. This was different to the case when no
1302 redirection occurred. The value is now passed back in both cases.
1304 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1305 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1306 use login_cap.h, so on its own it isn't the distinguishing feature. The
1307 new name refers directly to the setclassresources() function.
1309 PH/65 Added configuration files for NetBSD3.
1311 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1313 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1314 is preferred over IPv4.
1316 PH/68 The bounce_return_message and bounce_return_body options were not being
1317 honoured for bounces generated during the reception of non-SMTP messages.
1318 In particular, this applied to messages rejected by the ACL. This bug has
1319 been fixed. However, if bounce_return_message is true and bounce_return_
1320 body is false, the headers that are returned for a non-SMTP message
1321 include only those that have been read before the error was detected.
1322 (In the case of an ACL rejection, they have all been read.)
1324 PH/69 The HTML version of the specification is now built in a directory called
1325 spec_html instead of spec.html, because the latter looks like a path with
1326 a MIME-type, and this confuses some software.
1328 PH/70 Catch two compiler warnings in sieve.c.
1330 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1331 function verify_get_ident() calls ip_connect() to connect a socket, but
1332 if the "connect()" function timed out, ip_connect() used to close the
1333 socket. However, verify_get_ident() also closes the socket later, and in
1334 between Exim writes to the log, which may get opened at this point. When
1335 the socket was closed in ip_connect(), the log could get the same file
1336 descriptor number as the socket. This naturally causes chaos. The fix is
1337 not to close the socket in ip_connect(); the socket should be closed by
1338 the function that creates it. There was only one place in the code where
1339 this was missing, in the iplookup router, which I don't think anybody now
1340 uses, but I've fixed it anyway.
1342 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1343 well as to direct DNS lookups. Otherwise the handling of names in host
1344 lists is inconsistent and therefore confusing.
1350 PH/01 Two changes to the default runtime configuration:
1352 (1) Move the checks for relay_from_hosts and authenticated clients from
1353 after to before the (commented out) DNS black list checks.
1355 (2) Add control=submission to the relay_from_hosts and authenticated
1356 clients checks, on the grounds that messages accepted by these
1357 statements are most likely to be submissions.
1359 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1361 (1) Generate an error if the third argument for the ${prvs expansion is
1364 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1367 (3) Reset the variables that are obtained from the first argument of
1368 ${prvscheck and used in the second argument before leaving the code,
1369 because their memory is reclaimed, so using them afterwards may do
1372 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1373 one (it's much easier than Tom thought :-).
1375 (5) Because of (4), we can now allow for the use of $prvscheck_result
1376 inside the third argument.
1378 PH/03 For some reason, the default setting of PATH when running a command from
1379 a pipe transport was just "/usr/bin". I have changed it to
1382 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1383 anything to be listed in the output from -bV.
1385 PH/05 When a filter generated an autoreply, the entire To: header line was
1386 quoted in the delivery log line, like this:
1388 => >A.N.Other <ano@some.domain> <original@ddress> ...
1390 This has been changed so that it extracts the operative address. There
1391 may be more than one such address. If so, they are comma-separated, like
1394 => >ano@some.domain,ona@other.domain <original@ddress> ...
1396 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1397 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1398 not being looked up in the rDNS to get a host name, Exim was showing the
1399 IP address twice in Received: lines, even though the IP addresses were
1400 identical. For example:
1402 Received: from [1.2.3.4] (helo=[1.2.3.4])
1404 However, if the real host name was known, it was omitting the HELO data
1405 if it matched the actual IP address. This has been tidied up so that it
1406 doesn't show the same IP address twice.
1408 PH/07 When both +timestamp and +memory debugging was on, the value given by
1409 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1410 called by the debug printing, thereby overwriting the timestamp buffer.
1411 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1413 PH/08 When the original message was included in an autoreply transport, it
1414 always said "this is a copy of the message, including all the headers",
1415 even if body_only or headers_only was set. It now gives an appropriate
1418 PH/09 Applied a patch from the Sieve maintainer which:
1420 o fixes some comments
1421 o adds the (disabled) notify extension core
1422 o adds some debug output for the result of if/elsif tests
1423 o points to the current vacation draft in the documentation
1424 and documents the missing references header update
1428 o fixes a bug in processing the envelope test (when testing
1429 multiple envelope elements, the last element determinted the
1432 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1433 Electronic Mail") by including:
1435 Auto-submitted: auto-generated
1437 in the messages that it generates (bounce messages and others, such as
1438 warnings). In the case of bounce messages for non-SMTP mesages, there was
1439 also a typo: it was using "Auto_submitted" (underscore instead of
1440 hyphen). Since every message generated by Exim is necessarily in response
1441 to another message, thes have all been changed to:
1443 Auto-Submitted: auto-replied
1445 in accordance with these statements in the RFC:
1447 The auto-replied keyword:
1449 - SHOULD be used on messages sent in direct response to another
1450 message by an automatic process,
1452 - MUST NOT be used on manually-generated messages,
1454 - MAY be used on Delivery Status Notifications (DSNs) and Message
1455 Disposition Notifications (MDNs),
1457 - MUST NOT be used on messages generated by automatic or periodic
1458 processes, except for messages which are automatic responses to
1461 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1462 to the default Received: header definition.
1464 PH/12 Added log selector acl_warn_skipped (default on).
1466 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1467 variables because (a) they are in the wrong storage pool and (b) even if
1468 they were copied, it wouldn't work properly because of the caching.
1470 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1471 checking when decoding. Apparently there are clients that generate
1472 overlong encoded strings. Why am I not surprised?
1474 PH/15 If the first argument of "${if match_address" was not empty, but did not
1475 contain an "@" character, Exim crashed. Now it writes a panic log message
1476 and treats the condition as false.
1478 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1480 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1481 extension "envelope-auth". The code is finished and in agreement with
1482 other implementations, but there is no documentation so far and in fact,
1483 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1484 not changing the active code.
1486 Print executed "if" and "elsif" statements when debugging is used. This
1487 helps a great deal to understand what a filter does.
1489 Document more things not specified clearly in RFC3028. I had all this
1490 sorted out, when out of a sudden new issues came to my mind. Oops."
1492 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1495 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1496 canonical form (as documented). However, after a host name lookup from
1497 the IP address, check_host() was doing a simple string comparison with
1498 addresses acquired from the DNS when checking that the found name did
1499 have the original IP as one of its addresses. Since any found IPv6
1500 addresses are likely to be in abbreviated form, the comparison could
1501 fail. Luckily, there already exists a function for doing the comparison
1502 by converting both addresses to binary, so now that is used instead of
1503 the text comparison.
1505 PH/20 There was another similar case to PH/19, when a complete host name was
1506 given in a host list; looking up its IP address could give an abbreviated
1507 form, whereas the current host's name might or might not be abbreviated.
1508 The same fix has been applied.
1514 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1515 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1518 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1519 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1521 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1523 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1524 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1525 Also, for "Auto-Submitted", treat anything other than "no" as
1526 non-personal, in accordance with RFC 3834. (Previously it treated
1527 anything starting "auto-" as non-personal.)
1529 TF/01 The control=submission/name=... option had a problem with syntax
1530 errors if the name included a slash character. The /name= option
1531 now slurps the rest of the string, so it can include any characters
1532 but it must come last in the list of options (after /sender_retain
1535 PH/05 Some modifications to the interface to the fake nameserver for the new
1543 TK/01 Added the "success_on_redirect" address verification option. See
1544 NewStuff for rationale and an example.
1546 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1548 PH/02 Patch to exigrep to allow it to work on syslog lines.
1550 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1551 fread() to skip over the body file's header line, because in Cygwin the
1552 header line is locked and is inaccessible.
1554 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1555 co-exist for some time) to make it clear that it is the Exim ID that is
1556 referenced, not the Message-ID: header line.
1558 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1559 string_format() function, because snprintf() does not exist on all
1562 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1563 ${stat: expansion item.
1565 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1566 protocol synchronization error", to keep the pedants happy.
1568 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1569 well as for IRIX systems, when gcc is being used. See the host.c source
1572 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1574 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1577 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1578 transport and to the smtp transport in LMTP mode.
1580 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1582 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1583 run a filter in a subprocess. This could lead to confusion in subsequent
1584 lookups in the parent process. There should also be a search_tidyup() at
1585 the end of the subprocess.
1587 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1588 only if the host matched helo_try_verify_hosts, which caused the
1589 verification to occur when the EHLO/HELO command was issued. The ACL just
1590 tested the remembered result. Now, if a previous verification attempt has
1591 not happened, "verify = helo" does it there and then.
1593 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1595 TK/03 Fix log output including CR from clamd.
1597 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1598 exist provoked a memory error which could cause a segfault.
1600 PH/15 Installed PCRE 6.2
1602 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1604 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1605 of the problem. Specifically, suggested +O2 rather than +O1 for the
1608 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1610 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1611 record, the port was not correctly logged when the outgoing_port log
1612 selector was set (it logged the transort's default port).
1614 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1615 fallback_hosts, and "hosts" in the smtp transport.
1617 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1618 host errors such as "Connection refused".
1620 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1621 authentication with radiusclient 0.4.9:
1623 - Error returned from rc_read_config was caught wrongly
1624 - Username/password not passed on to radius server due to wrong length.
1626 The presumption is that some radiusclient API changes for 4.51/PH/17
1627 were not taken care of correctly. The code is still untested by me (my
1628 Linux distribution still has 0.3.2 of radiusclient), but it was
1629 contributed by a Radius user.
1631 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1632 expanding the "port" option of the smtp transport.
1634 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1635 while reading a MIME header. Thanks to Tom Hughes for a patch.
1637 PH/24 Include config.h inside local_scan.h so that configuration settings are
1640 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1641 that in an ACL for RCPT (for example), you can examine exactly what was
1644 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1645 commands, but it was not correctly comparing the address with the actual
1646 client host address. Thus, it would show the EHLO address in Received:
1647 header lines when this was not necessary.
1649 PH/27 Added the % operator to ${eval:}.
1651 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1652 it should be ignoring failures (because with -C, for example, it has lost
1653 privilege). It wasn't ignoring creation failures other than "already
1656 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1659 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1660 because an input line was too long, either on its own, or by virtue of
1661 too many continuations, the temporary file was not being removed, and the
1662 return code was incorrect.
1664 PH/31 Missing "BOOL" in function definition in filtertest.c.
1666 PH/32 Applied Sieve patches from the maintainer.
1668 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1670 PH/33 Added "verify = not_blind".
1672 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1673 Local/Makefile (with some defaults set). These are used in built scripts
1674 such as exicyclog, but they have never been used in the exim_install
1675 script (though there are many overriding facilities there). I have
1676 arranged that the exim_install script now takes note of these two
1679 PH/35 Installed configuration files for Dragonfly.
1681 PH/36 When a locally submitted message by a trusted user did not contain a
1682 From: header, and the sender address was obtained from -f or from an SMTP
1683 MAIL command, and the trusted user did not use -F to supply a sender
1684 name, $originator_name was incorrectly used when constructing a From:
1685 header. Furthermore, $originator_name was used for submission mode
1686 messages from external hosts without From: headers in a similar way,
1687 which is clearly wrong.
1689 PH/37 Added control=suppress_local_fixups.
1691 PH/38 When log_selector = +received_sender was set, and the addition of the
1692 sender made the log line's construction buffer exactly full, or one byte
1693 less than full, an overflow happened when the terminating "\n" was
1696 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1697 when the result of a list match is failure because a DNS lookup failed.
1699 PH/40 RM_COMMAND is now used in the building process.
1701 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1702 the "build-* directories that it finds.
1704 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1705 address in a domain literal was a prefix of an interface address.
1707 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1708 when verifying a sender address, unless rewrite_headers is false.
1710 PH/44 Wrote a long comment about why errors_to addresses are verified as
1711 recipients, not senders.
1713 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1714 the ratelimit ACL was added.
1716 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1718 PH/46 Added extra information about PostgreSQL errors to the error string.
1720 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1721 avoiding the need to install special zones in a real server. This is
1722 backwards compatible; if it can't find the fake resolver, it drops back.
1723 Thus, both old and new test suites can be run.
1725 TF/02 Added util/ratelimit.pl
1727 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1728 clock is set back in time.
1730 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1731 Candler <B.Candler@pobox.com>.
1733 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1734 OK for addresses that are the result of redirections.
1736 PH/48 A number of further additions for the benefit of the new test suite,
1737 including a fake gethostbyname() that interfaces to the fake DNS resolver
1740 TF/06 The fix for widen_domains has also been applied to qualify_single and
1741 search_parents which are the other dnslookup options that can cause
1744 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1747 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1749 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1750 service" if it encountered an MX record with an empty target hostname.
1751 The message is now "an MX or SRV record indicated no SMTP service".
1753 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1754 if the DNS of the sending site is misconfigured. This is quite a
1755 common situation. This change restores the behaviour of treating a
1756 helo verification defer as a failure.
1758 PH/51 If self=fail was set on a router, the bounce message did not include the
1759 actual error message.
1765 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1767 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1768 command itself ended in error, the underlying message about the transport
1769 filter timeout was being overwritten with the pipe command error. Now the
1770 underlying error message should be appended to the second error message.
1772 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1774 PH/02 Reduce the amount of output that "make" produces by default. Full output
1775 can still be requested.
1777 PH/03 The warning log line about a condition test deferring for a "warn" verb
1778 was being output only once per connection, rather than after each
1779 occurrence (because it was using the same function as for successful
1780 "warn" verbs). This seems wrong, so I have changed it.
1782 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1783 it should not have, which might have caused a crash in the right
1784 circumstances, but probably never did.
1786 PH/04 Installed a modified version of Tony Finch's patch to make submission
1787 mode fix the return path as well as the Sender: header line, and to
1788 add a /name= option so that you can make the user's friendly name appear
1791 TF/03 Added the control = fakedefer ACL modifier.
1793 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1794 Mark Lowes for thorough testing.
1796 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1798 TK/03 Merged latest SRS patch from Miles Wilton.
1800 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1801 with the definition in sysexits.h (which is #included earlier).
1802 Fortunately, Exim does not actually use EX_OK. The code used to try to
1803 preserve the sysexits.h value, by assumimg that macro definitions were
1804 scanned for macro replacements. I have been disabused of this notion,
1805 so now the code just undefines EX_OK before #including unistd.h.
1807 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1808 in the smtp transport. When a block could not be written in a single
1809 write() function, the timeout was being re-applied to each part-write.
1810 This seems wrong - if the receiver was accepting one byte at a time it
1811 would take for ever. The timeout is now adjusted when this happens. It
1812 doesn't have to be particularly precise.
1814 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1815 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1817 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1818 without a domain if the check to <postmaster@domain> fails.
1820 SC/01 Eximstats: added -xls and the ability to specify output files
1821 (patch written by Frank Heydlauf).
1823 SC/02 Eximstats: use FileHandles for outputing results.
1825 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1827 SC/04 Eximstats: fixed display of large numbers with -nvr option
1829 SC/05 Eximstats: fixed merging of reports with empty tables.
1831 SC/06 Eximstats: added the -include_original_destination flag
1833 SC/07 Eximstats: removed tabs and trailing whitespace.
1835 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1837 TK/06 MBOX spool code: Add real "From " MBOX separator line
1838 so the .eml file is really in mbox format (even though
1839 most programs do not really care). Patch from Alex Miller.
1841 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1842 The latter is generated from $received_to and is only set if the
1843 message has one envelope recipient. SA can use these headers,
1844 obviously out-of-the-box. Patch from Alex Miller.
1846 PH/08 The ${def test on a variable was returning false if the variable's
1847 value was "0", contrary to what the specification has always said!
1848 The result should be true unless the variable is empty.
1850 PH/09 The syntax error of a character other than { following "${if
1851 def:variable_name" (after optional whitespace) was not being diagnosed.
1852 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1853 accidental colon was present, for example, could give incorrect results.
1855 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1856 result is used (not including appendfile, where other changes are about
1859 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1860 This involved changing a lot of size variables from int to off_t. It
1861 should work with maildirs and everything.
1863 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1864 spamd dying while we are connected to it.
1866 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1869 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1870 function for BDB 4.3.
1872 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1874 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1875 the sources for PCRE have been re-arranged and more files are now
1878 PH/15 The code I had for printing potentially long long variables in PH/11
1879 above was not the best (it lost precision). The length of off_t variables
1880 is now inspected at build time, and an appropriate printing format (%ld
1881 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1882 to be "long long int" or "long int". This is needed for the internal
1883 formatting function string_vformat().
1885 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1886 the configuration file to be ":syslog", then the script "guesses" where
1887 the logs files are, rather than using the compiled in default. In our
1888 case the guess is not the same as the compiled default, so the script
1889 suddenly stopped working when I started to use syslog. The patch checks
1890 to see if log_file_path is "". If so, it attempts to read it from exim
1891 with no configuration file to get the compiled in version, before it
1892 falls back to the previous guessing code."
1894 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1895 implementing BATV in an Exim configuration. See NewStuff for the gory
1898 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1899 Makefile that are specific to HP-UX.
1901 PH/18 If the "use_postmaster" option was set for a recipient callout together
1902 with the "random" option, the postmaster address was used as the MAIL
1903 FROM address for the random test, but not for the subsequent recipient
1904 test. It is now used for both.
1906 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1907 patch removes a few documentation additions to RFC 3028, because the
1908 latest draft now contains them. It adds the new en;ascii-case comparator
1909 and a new error check for 8bit text in MIME parts. Comparator and
1910 require names are now matched exactly. I enabled the subaddress
1911 extension, but it is not well tested yet (read: it works for me)."
1913 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1914 rework some of the code of TK/09 above to avoid the hardwired use of
1915 "%lld" and "long long". Replaced the call to snprintf() with a call to
1918 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1919 records point to non-existent hosts", "retry timeout exceeded", and
1920 "retry time not reached for any host after a long failure period".
1922 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1923 experimental DomainKeys support:
1925 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1926 (2) On an error such as an illegally used "control", the wrong name for
1927 the control was given.
1929 These problems did NOT occur unless DomainKeys support was compiled.
1931 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1933 PH/24 Added ${if match_ip condition.
1935 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1936 databases so that it will be absolutely obvious if a crash occurs in the
1937 DB library. This is a regular occurrence (often caused by mis-matched
1940 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1941 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1942 picked up on a user's system that detects such things. There doesn't seem
1943 to be a gcc warning option for this - only an attribute that has to be
1944 put on the function's prototype. It seems that in Fedora Core 4 they have
1945 set this on a number of new functions. No doubt there will be more in due
1948 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1949 specify a transport. However, if an address that was verified by such a
1950 router was the subject of a callout, Exim crashed because it tried to
1951 read the rcpt_include_affixes from the non-existent transport. Now it
1952 just assumes that the setting of that option is false. This bug was
1953 introduced by 4.51/PH/31.
1955 PH/28 Changed -d+all to exclude +memory, because that information is very
1956 rarely of interest, but it makes the output a lot bigger. People tend to
1957 do -d+all out of habit.
1959 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1960 code in os-type was giving problems when libc.so lives in lib64, like on
1963 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1964 aren't the modern standard, and it seems that some systems' include files
1965 don't always have them. Exim was already checking for some of the newer
1966 ones like T_AAAA, and defining it itself. I've added checks for all the
1967 record types that Exim uses.
1969 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1970 not automatically generating a new one, as it is supposed to. This
1971 prevented TLS from working. If the file did exist, but contained invalid
1972 data, a new version was generated, as expected. It was only the case of a
1973 non-existent file that was broken.
1975 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1976 with a change in libdomainkeys > 0.64.
1978 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1979 from DNS. If the selector record carries the flag, it now has
1980 precedence over the domain-wide flag.
1982 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1984 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1985 the use of a port name that isn't defined in /etc/services) occurred, the
1986 message was deferred as in a normal delivery, and thus remained on the
1987 spool, instead of being failed because of the mua_wrapper setting. This
1988 is now fixed, and I tidied up some of the mua_wrapper messages at the
1991 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1992 the messages in a hash of arrays rather than using individual hashes.
1993 This is a bit cleaner and results in dramatic memory savings, albeit
1994 at a slight CPU cost.
1996 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1997 as requested by Marc Sherman.
1999 SC/10 Eximstats: added histograms for user specified patterns as requested
2002 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2004 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2005 fopen() in the content-scanning modules that did not already have it.
2011 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2012 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2014 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2016 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2018 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2019 to test Sieve filters that use "vacation".
2021 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2022 that changes the way the GnuTLS parameters are stored in the cache file.
2023 The new format can be generated externally. For backward compatibility,
2024 if the data in the cache doesn't make sense, Exim assumes it has read an
2025 old-format file, and it generates new data and writes a new file. This
2026 means that you can't go back to an older release without removing the
2029 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2030 work if there are any delivery delays because "one_time" forces the
2031 parent to be marked "delivered", so its unseen clone is never tried
2032 again. For this reason, Exim now forbids the simultaneous setting of
2035 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2036 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2037 entry if you want to know the details. The fix, however, neglected to
2038 consider the case when local delivery batching is involved. The test for
2039 "previously delivered" was not happening when checking to see if an
2040 address could be batched with a previous (undelivered) one; under
2041 certain circumstances this could lead to multiple deliveries to the same
2044 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2045 in its include files, and this causes problems building Exim.
2047 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2048 header_syntax) but Exim was just ignoring anything given after a slash.
2049 In particular, this caused confusion with an attempt to use "verify =
2050 reverse_host_lookup/defer_ok". An error is now given when options are
2051 supplied for verify items that do not have them. (Maybe reverse_host_
2052 lookup should have a defer_ok option, but that's a different point.)
2054 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2055 defined by RFC 821) to 2048, because there were problems with some AUTH
2056 commands, and RFC 1869 says the size should be increased for extended
2057 SMTP commands that take arguments.
2059 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2062 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2063 "unknown" error; now it says that the functionality isn't in the binary.
2065 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2066 an address' error message when a string expansion fails (syntax or
2067 whatever). Otherwise the password may appear in the log. Following change
2068 PH/42 below, there is no longer a chance of it appearing in a bounce
2071 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2073 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2074 of its addresses was ever tried. (Bugzilla bug #2.)
2076 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2077 the result incorrectly in the debug output. (It correctly added a newline
2078 to what was transported.)
2080 TF/01 Added $received_time.
2082 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2083 commented out examples of how to interface to a virus scanner and to
2084 SpamAssassin. Also added commented examples of av_scanner and
2085 spamd_address settings.
2087 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2088 and controls are allowed in which ACLs. There were a couple of minor
2089 errors. Some of the entries in the conditions table (which is a table of
2090 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2091 negation of where the condition IS allowed.
2093 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2095 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2096 header file does not have a version number, so I've had to invent a new
2097 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2098 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2099 radiusclient), but it was contributed by a Radius user.
2101 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2102 files or directories, for OpenSSL.
2104 PH/19 When an Exim process that is running as root has to create an Exim log
2105 file, it does so in a subprocess that runs as exim:exim so as to get the
2106 ownership right at creation (otherwise, other Exim processes might see
2107 the file with the wrong ownership). There was no test for failure of this
2108 fork() call, which would lead to the process getting stuck as it waited
2109 for a non-existent subprocess. Forks do occasionally fail when resources
2110 run out. I reviewed all the other calls to fork(); they all seem to check
2113 PH/20 When checking for unexpected SMTP input at connect time (before writing
2114 the banner), Exim was not dealing correctly with a non-positive return
2115 from the read() function. If the client had disconnected by this time,
2116 the result was a log entry for a synchronization error with an empty
2117 string after "input=" when read() returned zero. If read() returned -1
2118 (an event I could not check), uninitialized data bytes were printed.
2119 There were reports of junk text (parts of files, etc) appearing after
2122 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2124 PH/22 Added support for macro redefinition, and (re)definition in between
2125 driver and ACL definitions.
2127 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2128 forgetting to use the resulting value; it was using the unexpanded value.
2130 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2131 hadn't been configured. The fix is from Juergen Kreileder, who
2132 understands it better than I do:
2134 "Here's what I see happening with three configured cyrus_sasl
2135 authenticators configured (plain, login, cram-md5):
2137 On startup auth_cyrus_sasl_init() gets called for each of these.
2138 This means three calls to sasl_listmech() without a specified mech_list.
2139 => SASL tests which mechs of all available mechs actually work
2140 => three warnings about OTP not working
2141 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2143 With the patch, sasl_listmech() also gets called three times. But now
2144 SASL's mech_list option is set to the server_mech specified in the the
2145 authenticator. Or in other words, the answer from sasl_listmech()
2146 gets limited to just the mech you're testing for (which is different
2148 => the return list contains just 'plain' or 'login', 'cram-md5' or
2149 nothing depending on the value of ob->server_mech.
2151 I've just tested the patch: Authentication still works fine,
2152 unavailable mechs specified in the exim configuration are still
2153 caught, and the auth.log warnings about OTP are gone."
2155 PH/25 When debugging is enabled, the contents of the command line are added
2156 to the debugging output, even when log_selector=+arguments is not
2159 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2160 answer is "GNU", and only if the return is "GNU/something" is the answer
2163 PH/27 $acl_verify_message is now set immediately after the failure of a
2164 verification in an ACL, and so is available in subsequent modifiers. In
2165 particular, the message can be preserved by coding like this:
2167 warn !verify = sender
2168 set acl_m0 = $acl_verify_message
2170 Previously, $acl_verify_message was set only while expanding "message"
2171 and "log_message" when a very denied access.
2173 PH/28 Modified OS/os.c-Linux with
2175 -#ifndef OS_LOAD_AVERAGE
2176 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2178 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2179 nomenclature these days.)
2181 PH/29 Installed patch from the Sieve maintainer that adds the options
2182 sieve_useraddress and sieve_subaddress to the redirect router.
2184 PH/30 In these circumstances:
2185 . Two addresses routed to the same list of hosts;
2186 . First host does not offer TLS;
2187 . First host accepts first address;
2188 . First host gives temporary error to second address;
2189 . Second host offers TLS and a TLS session is established;
2190 . Second host accepts second address.
2191 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2192 and peerdn, if requested) that were in fact used only for the second
2195 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2196 attention to any local part prefix or suffix that was matched by the
2197 router that accepted the address. It now behaves in the same way as it
2198 does for delivery: the affixes are removed from the local part unless
2199 rcpt_include_affixes is set on the transport.
2201 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2202 timeout during the DATA phase of an incoming message.
2204 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2205 applied a patch sanctioned by the Sieve maintainer.
2207 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2208 the uid or gid is negative. A case of a negative gid caused this to be
2209 noticed. The fix allows for either to be negative.
2211 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2212 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2215 PH/36 The change PH/12 above was broken. Fixed it.
2217 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2218 the grounds that routing the same address twice would always produce the
2219 same answer. This might have been true once, but it is certainly no
2220 longer true now. Routing a child address may depend on the previous
2221 routing that produced that child. Some complicated redirection strategies
2222 went wrong when messages had multiple recipients, and made Exim's
2223 behaviour dependent on the order in which the addresses were given.
2225 I have moved the duplicate checking until after the routing is complete.
2226 Exim scans the addresses that are assigned to local and remote
2227 transports, and removes any duplicates. This means that more work will be
2228 done, as duplicates will always all be routed, but duplicates are
2229 presumably rare, so I don't expect this is of any significance.
2231 For deliveries to pipes, files, and autoreplies, the duplicate checking
2232 still happens during the routing process, since they are not going to be
2235 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2236 It corrects a timeout issue with spamd. This is Ian's comment: "The
2237 background is that sometimes spamd either never reads data from a
2238 connection it has accepted, or it never writes response data. The exiscan
2239 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2240 blindly assumes that writes won't block so it may never time out."
2242 PH/39 Allow G after quota size as well as K and M.
2244 PH/40 The value set for $authenticated_id in an authenticator may not contain
2245 binary zeroes or newlines because the value is written to log lines and
2246 to spool files. There was no check on this. Now the value is run through
2247 the string_printing() function so that such characters are converted to
2248 printable escape sequences.
2250 PH/41 $message_linecount is a new variable that contains the total number of
2251 lines in the message. Compare $body_linecount, which is the count for the
2254 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2255 bounce and delay warning messages, except in certain special cases, which
2258 (a) An SMTP error message from a remote host;
2259 (b) A message specified in a :fail: redirection;
2260 (c) A message specified in a "fail" command in a system filter;
2261 (d) A message specified in a FAIL return from the queryprogram router;
2262 (e) A message specified by the cannot_route_message router option.
2264 In these cases only, Exim does include the error details in bounce and
2265 warning messages. There are also a few cases where bland messages such
2266 as "unrouteable address" or "local delivery error" are given.
2268 PH/43 $value is now also set for the "else" part of a ${run expansion.
2270 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2271 being worked on, but at least Exim now implements the latest version to
2274 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2275 process to complete was treated as a delivery failure, a timeout while
2276 writing the message to the pipe was logged, but erroneously treated as a
2277 successful delivery. Such timeouts include transport filter timeouts. For
2278 consistency with the overall process timeout, these timeouts are now
2279 treated as errors, giving rise to delivery failures by default. However,
2280 there is now a new Boolean option for the pipe transport called
2281 timeout_defer, which, if set TRUE, converts the failures into defers for
2282 both kinds of timeout. A transport filter timeout is now identified in
2285 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2286 systems where "make" and "gmake" are different, calling "gmake" at top
2287 level broke things. I've arranged for the value of $(MAKE) to be passed
2288 from the Makefile to this script so that it can call the same version of
2292 A note about Exim versions 4.44 and 4.50
2293 ----------------------------------------
2295 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2296 changes of various kinds. As a consequence, a big documentation update was
2297 needed. This delayed the release for rather longer than seemed good, especially
2298 in the light of a couple of (minor) security issues. Therefore, the changes
2299 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2300 release. So 4.44 and 4.50 are in effect two different branches that both start
2303 I have left the 4.50 change log unchanged; it contains all the changes since
2304 4.43. The change log for 4.44 is below; many of its items are identical to
2305 those for 4.50. This seems to be the most sensible way to preserve the
2306 historical information.
2312 1. Minor wording change to the doc/README.SIEVE file.
2314 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2315 computation of the current number of files was incorrect.
2317 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2318 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2321 4. Give more explanation in the error message when the command for a transport
2322 filter fails to execute.
2324 5. There are several places where Exim runs a non-Exim command in a
2325 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2326 was being done only for the command run by the queryprogram router. It is
2327 now done for all such subprocesses. The other cases are: ${run, transport
2328 filters, and the commands run by the lmtp and pipe transports.
2330 6. Added CONFIGURE_GROUP build-time option.
2332 7. Some older OS have a limit of 256 on the maximum number of file
2333 descriptors. Exim was using setrlimit() to set 1000 as a large value
2334 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2335 systems. I've change it so that if it can't get 1000, it tries for 256.
2337 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2338 was an oversight, and furthermore, ever since the addition of extra
2339 controls (e.g. 4.43/32), the checks on when to allow different forms of
2340 "control" were broken. There should now be diagnostics for all cases when a
2341 control that does not make sense is encountered.
2343 9. Added the /retain_sender option to "control=submission".
2345 10. $recipients is now available in the predata ACL (oversight).
2347 11. Tidy the search cache before the fork to do a delivery from a message
2348 received from the command line. Otherwise the child will trigger a lookup
2349 failure and thereby defer the delivery if it tries to use (for example) a
2350 cached ldap connection that the parent has called unbind on.
2352 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2353 of $address_data from the recipient verification was clobbered by the
2354 sender verification.
2356 13. The value of address_data from a sender verification is now available in
2357 $sender_address_data in subsequent conditions in the ACL statement.
2359 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2361 15. Added a new option "connect=<time>" to callout options, to set a different
2364 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2365 was its contents. (It was OK if the option was not defined at all.)
2367 17. A "Completed" log line is now written for messages that are removed from
2368 the spool by the -Mrm option.
2370 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2371 information about exactly what failed.
2373 19. Added -dd to debug only the daemon process.
2375 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2376 handles timeouts, both on the server side and network timeouts. Renamed the
2377 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2379 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2380 It is now set to "smtps".
2382 22. $host_address is now set to the target address during the checking of
2383 ignore_target_hosts.
2385 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2386 being passed; this would have caused $sender_host_name to have been used if
2387 matching the list had actually called for a host name (not very likely,
2388 since this list is usually IP addresses). A host name is now passed as
2391 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2392 code that specifies a non-restarting handler (typically sigaction() in
2393 modern systems) in an attempt to fix a rare and obscure crash bug.
2395 25. Narrowed the window for a race in the daemon that could cause it to ignore
2396 SIGCHLD signals. This is not a major problem, because they are used only to
2397 wake it up if nothing else does.
2399 26. A malformed maildirsize file could cause Exim to calculate negative values
2400 for the mailbox size or file count. Odd effects could occur as a result.
2401 The maildirsize information is now recalculated if the size or filecount
2404 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2405 support for a long time. Removed HAVE_SYS_VFS_H.
2407 28. Installed the latest version of exipick from John Jetmore.
2409 29. In an address list, if the pattern was not a regular expression, an empty
2410 subject address (from a bounce message) matched only if the pattern was an
2411 empty string. Non-empty patterns were not even tested. This was the wrong
2412 because it is perfectly reasonable to use an empty address as part of a
2413 database query. An empty address is now tested by patterns that are
2414 lookups. However, all the other forms of pattern expect the subject to
2415 contain a local part and a domain, and therefore, for them, an empty
2416 address still always fails if the pattern is not itself empty.
2418 30. Exim went into a mad DNS loop when attempting to do a callout where the
2419 host was specified on an smtp transport, and looking it up yielded more
2420 than one IP address.
2422 31. Re-factored the code for checking spool and log partition space into a
2423 function that finds that data and another that does the check. The former
2424 is then used to implement four new variables: $spool_space, $log_space,
2425 $spool_inodes, and $log_inodes.
2427 32. The RFC2047 encoding function was originally intended for short strings
2428 such as real names; it was not keeping to the 75-character limit for
2429 encoded words that the RFC imposes. It now respects the limit, and
2430 generates multiple encoded words if necessary. To be on the safe side, I
2431 have increased the buffer size for the ${rfc2047: expansion operator from
2434 33. It is now permitted to omit both strings after an "if" condition; if the
2435 condition is true, the result is "true". As before, when the second string
2436 is omitted, a false condition yields an empty string. This makes it less
2437 cumbersome to write custom ACL and router conditions.
2439 34. Failure to deliver a bounce message always caused it to be frozen, even if
2440 there was an errors_to setting on the router. The errors_to setting is now
2443 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2444 canonical form (fully expanded) before being placed in
2445 $sender_host_address.
2447 36. The table in the code that translates DNS record types into text (T_A to
2448 "A" for instance) was missing entries for NS and CNAME. It is just possible
2449 that this could have caused confusion if both these types were looked up
2450 for the same domain, because the text type is used as part of Exim's
2451 per-process caching. But the chance of anyone hitting this buglet seems
2454 37. The dnsdb lookup has been extended in a number of ways.
2456 (1) There is a new type, "zns", which walks up the domain tree until it
2457 finds some nameserver records. It should be used with care.
2459 (2) There is a new type, "mxh", which is like "mx" except that it returns
2460 just the host names, not the priorities.
2462 (3) It is now possible to give a list of domains (or IP addresses) to be
2463 looked up. The behaviour when one of the lookups defers can be
2464 controlled by a keyword.
2466 (4) It is now possible to specify the separator character for use when
2467 multiple records are returned.
2469 38. The dnslists ACL condition has been extended: it is now possible to supply
2470 a list of IP addresses and/or domains to be looked up in a particular DNS
2473 39. Added log_selector=+queue_time_overall.
2475 40. When running the queue in the test harness, wait just a tad after forking a
2476 delivery process, to get repeatability of debugging output.
2478 41. Include certificate and key file names in error message when GnuTLS fails
2479 to set them up, because the GnuTLS error message doesn't include the name
2480 of the failing file when there is a problem reading it.
2482 42. Allow both -bf and -bF in the same test run.
2484 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2486 44. The "Exiscan patch" is now merged into the mainline Exim source.
2488 45. Sometimes the final signoff response after QUIT could fail to get
2489 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2490 < 0 before doing a fflush(). This bug looks as though it goes back to the
2491 introduction of TLS in release 3.20, but "sometimes" must have been rare
2492 because the tests only now provoked it.
2494 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2495 (this can affect the format of dates).
2497 47. exim_tidydb, when checking for the continued existence of a message for
2498 which it has found a message-specific retry record, was not finding
2499 messages that were in split spool directories. Consequently, it was
2500 deleting retry records that should have stayed in existence.
2502 48. Steve fixed some bugs in eximstats.
2504 49. The SPA authentication driver was not abandoning authentication and moving
2505 on to the next authenticator when an expansion was forced to fail,
2506 contradicting the general specification for all authenticators. Instead it
2507 was generating a temporary error. It now behaves as specified.
2509 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2510 (the order specifies the preference for clients). The order is now AES256,
2511 AES128, 3DES, ARCFOUR128.
2513 51. Small patch to Sieve code - explicitly set From: when generating an
2516 52. Exim crashed if a remote delivery caused a very long error message to be
2517 recorded - for instance if somebody sent an entire SpamAssassin report back
2518 as a large number of 550 error lines. This bug was coincidentally fixed by
2519 increasing the size of one of Exim's internal buffers (big_buffer) that
2520 happened as part of the Exiscan merge. However, to be on the safe side, I
2521 have made the code more robust (and fixed the comments that describe what
2524 53. Now that there can be additional text after "Completed" in log lines (if
2525 the queue_time_overall log selector is set), a one-byte patch to exigrep
2526 was needed to allow it to recognize "Completed" as not the last thing in
2529 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2530 patch that reportedly fixes this has been added. I am not expert enough to
2531 create a test for it. This is what the patch creator wrote:
2533 "I found a little strange behaviour of ldap code when working with
2534 Windows 2003 AD Domain, where users was placed in more than one
2535 Organization Units. When I tried to give exim partial DN, the exit code
2536 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2537 But simultaneously result of request was absolutely normal ldap result,
2538 so I produce this patch..."
2540 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2541 REFERENCE, so I have modified the code to exclude the patch when that macro
2544 55. Some experimental protocols are using DNS PTR records for new purposes. The
2545 keys for these records are domain names, not reversed IP addresses. The
2546 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2547 leaves it alone. Component reversal etc. now happens only for IP addresses.
2550 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2552 57. Double the size of the debug message buffer (to 2048) so that more of very
2553 long debug lines gets shown.
2555 58. The exicyclog utility now does better if the number of log files to keep
2556 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2558 59. Two changes related to the smtp_active_hostname option:
2560 (1) $smtp_active_hostname is now available as a variable.
2561 (2) The default for smtp_banner uses $smtp_active_hostname instead
2562 of $primary_hostname.
2564 60. The host_aton() function is supposed to be passed a string that is known
2565 to be a valid IP address. However, in the case of IPv6 addresses, it was
2566 not checking this. This is a hostage to fortune. Exim now panics and dies
2567 if the condition is not met. A case was found where this could be provoked
2568 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2569 components; fortuitously, this particular loophole had already been fixed
2570 by change 4.50/55 above.
2572 If there are any other similar loopholes, the new check in host_aton()
2573 itself should stop them being exploited. The report I received stated that
2574 data on the command line could provoke the exploit when Exim was running as
2575 exim, but did not say which command line option was involved. All I could
2576 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2577 running as the user.
2580 61. There was a buffer overflow vulnerability in the SPA authentication code
2581 (which came originally from the Samba project). I have added a test to the
2582 spa_base64_to_bits() function which I hope fixes it.
2585 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2586 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2588 63. The daemon start-up calls getloadavg() while still root for those OS that
2589 need the first call to be done as root, but it missed one case: when
2590 deliver_queue_load_max is set with deliver_drop_privilege. This is
2591 necessary for the benefit of the queue runner, because there is no re-exec
2592 when deliver_drop_privilege is set.
2594 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2595 This has been fixed.
2597 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2598 was in use, was not putting the data itself into the right store pool;
2599 consequently, it could be overwritten for a subsequent message in the same
2600 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2603 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2605 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2606 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2607 the function were treating the return as a boolean value, which happened to
2608 work because 0=false and not-0=true, but is not correct code.
2610 68. The host_aton() function was not handling scoped IPv6 addresses (those
2611 with, for example, "%eth0" on the end) correctly.
2613 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2614 negated items (that is, ~something) in unsigned ints. Some compilers
2615 apparently mutter when there is no cast.
2617 70. If an address verification called from an ACL failed, and did not produce a
2618 user-specific message (i.e. there was only a "system" message), nothing was
2619 put in $acl_verify_message. In this situation, it now puts the system
2622 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2623 session; change 4.31/43 added the unwanted input to the log line - except
2624 that it did not do this in the start of session case. It now does.
2626 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2627 This is wrong and can cause the other end to generate a synchronization
2628 error if it is another Exim or anything else that does the synchronization
2629 check. A QUIT command is no longer sent after a timeout.
2631 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2632 during host lookups.
2634 74. The defer_ok option of callout verification was not working if it was used
2635 when verifying addresses in header lines, that is, for this case:
2637 verify = header_sender/callout=defer_ok
2639 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2640 those file descriptors could be used for SMTP connections. If anything
2641 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2642 could be sent to the SMTP client, causing chaos. The daemon now opens
2643 stdin, stdout, and stderr to /dev/null when it puts itself into the
2646 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2647 log by default. The user can override this with suitable Perl magic.
2649 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2650 the log message when discard triggers, was not working for the DATA ACL or
2651 for the non-SMTP ACL.
2653 78. Error message wording change in sieve.c.
2655 79. If smtp_accept_max_per_host was set, the number of connections could be
2656 restricted to fewer than expected, because the daemon was trying to set up
2657 a new connection before checking whether the processes handling previous
2658 connections had finished. The check for completed processes is now done
2659 earlier. On busy systems, this bug wouldn't be noticed because something
2660 else would have woken the daemon, and it would have reaped the completed
2663 80. If a message was submitted locally by a user whose login name contained one
2664 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2665 It caused a spool format error. I have fixed the spool reading code. A
2666 related problem was that the "from" clause in the Received: line became
2667 illegal because of the space(s). It is now covered by ${quote_local_part.
2669 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2672 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2674 83. Patch from Sieve maintainer to fix unterminated string problem in
2675 "vacation" handling.
2677 84. Some minor changes to the Linux configuration files to help with other
2678 OS variants using glibc.
2680 85. One more patch for Sieve to update vacation handling to latest spec.
2683 ----------------------------------------------------
2684 See the note above about the 4.44 and 4.50 releases.
2685 ----------------------------------------------------
2691 1. Change 4.43/35 introduced a bug that caused file counts to be
2692 incorrectly computed when quota_filecount was set in an appendfile
2695 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2696 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2699 3. Give more explanation in the error message when the command for a transport
2700 filter fails to execute.
2702 4. There are several places where Exim runs a non-Exim command in a
2703 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2704 was being done only for the command run by the queryprogram router. It is
2705 now done for all such subprocesses. The other cases are: ${run, transport
2706 filters, and the commands run by the lmtp and pipe transports.
2708 5. Some older OS have a limit of 256 on the maximum number of file
2709 descriptors. Exim was using setrlimit() to set 1000 as a large value
2710 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2711 systems. I've change it so that if it can't get 1000, it tries for 256.
2713 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2714 was an oversight, and furthermore, ever since the addition of extra
2715 controls (e.g. 4.43/32), the checks on when to allow different forms of
2716 "control" were broken. There should now be diagnostics for all cases when a
2717 control that does not make sense is encountered.
2719 7. $recipients is now available in the predata ACL (oversight).
2721 8. Tidy the search cache before the fork to do a delivery from a message
2722 received from the command line. Otherwise the child will trigger a lookup
2723 failure and thereby defer the delivery if it tries to use (for example) a
2724 cached ldap connection that the parent has called unbind on.
2726 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2727 of $address_data from the recipient verification was clobbered by the
2728 sender verification.
2730 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2731 was its contents. (It was OK if the option was not defined at all.)
2733 11. A "Completed" log line is now written for messages that are removed from
2734 the spool by the -Mrm option.
2736 12. $host_address is now set to the target address during the checking of
2737 ignore_target_hosts.
2739 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2740 being passed; this would have caused $sender_host_name to have been used if
2741 matching the list had actually called for a host name (not very likely,
2742 since this list is usually IP addresses). A host name is now passed as
2745 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2746 code that specifies a non-restarting handler (typically sigaction() in
2747 modern systems) in an attempt to fix a rare and obscure crash bug.
2749 15. Narrowed the window for a race in the daemon that could cause it to ignore
2750 SIGCHLD signals. This is not a major problem, because they are used only to
2751 wake it up if nothing else does.
2753 16. A malformed maildirsize file could cause Exim to calculate negative values
2754 for the mailbox size or file count. Odd effects could occur as a result.
2755 The maildirsize information is now recalculated if the size or filecount
2758 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2759 support for a long time. Removed HAVE_SYS_VFS_H.
2761 18. Updated exipick to current release from John Jetmore.
2763 19. Allow an empty sender to be matched against a lookup in an address list.
2764 Previously the only cases considered were a regular expression, or an
2767 20. Exim went into a mad DNS lookup loop when doing a callout where the
2768 host was specified on the transport, if the DNS lookup yielded more than
2771 21. The RFC2047 encoding function was originally intended for short strings
2772 such as real names; it was not keeping to the 75-character limit for
2773 encoded words that the RFC imposes. It now respects the limit, and
2774 generates multiple encoded words if necessary. To be on the safe side, I
2775 have increased the buffer size for the ${rfc2047: expansion operator from
2778 22. Failure to deliver a bounce message always caused it to be frozen, even if
2779 there was an errors_to setting on the router. The errors_to setting is now
2782 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2783 canonical form (fully expanded) before being placed in
2784 $sender_host_address.
2786 24. Updated eximstats to version 1.33
2788 25. Include certificate and key file names in error message when GnuTLS fails
2789 to set them up, because the GnuTLS error message doesn't include the name
2790 of the failing file when there is a problem reading it.
2792 26. Expand error message when OpenSSL has problems setting up cert/key files.
2795 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2796 (this can affect the format of dates).
2798 28. exim_tidydb, when checking for the continued existence of a message for
2799 which it has found a message-specific retry record, was not finding
2800 messages that were in split spool directories. Consequently, it was
2801 deleting retry records that should have stayed in existence.
2803 29. eximstats updated to version 1.35
2804 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2805 1.35 - bugfix such that pie charts by volume are generated correctly
2807 30. The SPA authentication driver was not abandoning authentication and moving
2808 on to the next authenticator when an expansion was forced to fail,
2809 contradicting the general specification for all authenticators. Instead it
2810 was generating a temporary error. It now behaves as specified.
2812 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2813 (the order specifies the preference for clients). The order is now AES256,
2814 AES128, 3DES, ARCFOUR128.
2816 31. Small patch to Sieve code - explicitly set From: when generating an
2819 32. Exim crashed if a remote delivery caused a very long error message to be
2820 recorded - for instance if somebody sent an entire SpamAssassin report back
2821 as a large number of 550 error lines. This bug was coincidentally fixed by
2822 increasing the size of one of Exim's internal buffers (big_buffer) that
2823 happened as part of the Exiscan merge. However, to be on the safe side, I
2824 have made the code more robust (and fixed the comments that describe what
2827 33. Some experimental protocols are using DNS PTR records for new purposes. The
2828 keys for these records are domain names, not reversed IP addresses. The
2829 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2830 leaves it alone. Component reversal etc. now happens only for IP addresses.
2833 34. The host_aton() function is supposed to be passed a string that is known
2834 to be a valid IP address. However, in the case of IPv6 addresses, it was
2835 not checking this. This is a hostage to fortune. Exim now panics and dies
2836 if the condition is not met. A case was found where this could be provoked
2837 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2838 components; fortuitously, this particular loophole had already been fixed
2839 by change 4.50/55 or 4.44/33 above.
2841 If there are any other similar loopholes, the new check in host_aton()
2842 itself should stop them being exploited. The report I received stated that
2843 data on the command line could provoke the exploit when Exim was running as
2844 exim, but did not say which command line option was involved. All I could
2845 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2846 running as the user.
2849 35. There was a buffer overflow vulnerability in the SPA authentication code
2850 (which came originally from the Samba project). I have added a test to the
2851 spa_base64_to_bits() function which I hope fixes it.
2854 36. The daemon start-up calls getloadavg() while still root for those OS that
2855 need the first call to be done as root, but it missed one case: when
2856 deliver_queue_load_max is set with deliver_drop_privilege. This is
2857 necessary for the benefit of the queue runner, because there is no re-exec
2858 when deliver_drop_privilege is set.
2860 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2861 was in use, was not putting the data itself into the right store pool;
2862 consequently, it could be overwritten for a subsequent message in the same
2863 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2866 38. Sometimes the final signoff response after QUIT could fail to get
2867 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2868 < 0 before doing a fflush(). This bug looks as though it goes back to the
2869 introduction of TLS in release 3.20, but "sometimes" must have been rare
2870 because the tests only now provoked it.
2876 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2877 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2878 Now it returns an integer. A number of calls were still expecting a T/F
2879 return. Fortuitously, in all cases, the tests worked in OK situations,
2880 which is the norm. However, things would have gone wrong on any write
2881 failures on the smtp file descriptor. This function is used when sending
2882 messages over SMTP and also when doing verify callouts.
2884 2. When Exim is called to do synchronous delivery of a locally submitted
2885 message (the -odf or -odi options), it no longer closes stderr before doing
2888 3. Implemented the mua_wrapper option.
2890 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2892 5. Implemented the functions header_remove(), header_testname(),
2893 header_add_at_position(), and receive_remove_recipient(), and exported them
2896 6. If an ACL "warn" statement specified the addition of headers, Exim already
2897 inserted X-ACL-Warn: at the start if there was no header name. However, it
2898 was not making this test for the second and subsequent header lines if
2899 there were newlines in the string. This meant that an invalid header could
2900 be inserted if Exim was badly configured.
2902 7. Allow an ACL "warn" statement to add header lines at the start or after all
2903 the Received: headers, as well as at the end.
2905 8. Added the rcpt_4xx retry error code.
2907 9. Added postmaster_mailfrom=xxx to callout verification option.
2909 10. Added mailfrom=xxxx to the callout verification option, for verify=
2912 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2913 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2915 12. Inserted some casts to stop certain compilers warning when using pointer
2916 differences as field lengths or precisions in printf-type calls (mostly
2917 affecting debugging statements).
2919 13. Added optional readline() support for -be (dynamically loaded).
2921 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2922 same clock tick as a message's arrival, so that its received time was the
2923 same as the "first fail" time on the retry record, and that message
2924 remained on the queue past the ultimate address timeout, every queue runner
2925 would try a delivery (because it was past the ultimate address timeout) but
2926 after another failure, the ultimate address timeout, which should have then
2927 bounced the address, did not kick in. This was a "< instead of <=" error;
2928 in most cases the first failure would have been in the next clock tick
2929 after the received time, and all would be well.
2931 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2932 being recognized when the domain list was tested by the match_domain
2933 condition in an expansion string.
2935 16. Added the ${str2b64: operator.
2937 17. Exim was always calling setrlimit() to set a large limit for the number of
2938 processes, without checking whether the existing limit was already
2939 adequate. (It did check for the limit on file descriptors.) Furthermore,
2940 errors from getrlimit() and setrlimit() were being ignored. Now they are
2941 logged to the main and panic logs, but Exim does carry on, to try to do its
2942 job under whatever limits there are.
2944 18. Imported PCRE 5.0.
2946 19. Trivial typo in log message " temporarily refused connection" (the leading
2949 20. If the log selector return_path_on_delivery was set and an address was
2950 redirected to /dev/null, the delivery process crashed because it assumed
2951 that a return path would always be set for a "successful" delivery. In this
2952 case, the whole delivery is bypassed as an optimization, and therefore no
2955 21. Internal re-arrangement: the function for sending a challenge and reading
2956 a response while authentication was assuming a zero-terminated challenge
2957 string. It's now changed to take a pointer and a length, to allow for
2958 binary data in such strings.
2960 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2962 23. Exim was not respecting finduser_retries when seeking the login of the
2963 uid under which it was called; it was always trying 10 times. (The default
2964 setting of finduser_retries is zero.) Also, it was sleeping after the final
2965 failure, which is pointless.
2967 24. Implemented tls_on_connect_ports.
2969 25. Implemented acl_smtp_predata.
2971 26. If the domain in control=submission is set empty, Exim assumes that the
2972 authenticated id is a complete email address when it generates From: or
2973 Sender: header lines.
2975 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2976 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2977 chown and chgrp in /bin and hostname in /usr/bin.
2979 28. Exim was keeping the "process log" file open after each use, just as it
2980 does for the main log. This opens the possibility of it remaining open for
2981 long periods when the USR1 signal hits a daemon. Occasional processlog
2982 errors were reported, that could have been caused by this. Anyway, it seems
2983 much more sensible not to leave this file open at all, so that is what now
2986 29. The long-running daemon process does not normally write to the log once it
2987 has entered its main loop, and it closes the log before doing so. This is
2988 so that log files can straightforwardly be renamed and moved. However,
2989 there are a couple of unusual error situations where the daemon does write
2990 log entries, and I had neglected to close the log afterwards.
2992 30. The text of an SMTP error response that was received during a remote
2993 delivery was being truncated at 512 bytes. This is too short for some of
2994 the long messages that one sometimes sees. I've increased the limit to
2997 31. It is now possible to make retry rules that apply only when a message has a
2998 specific sender, in particular, an empty sender.
3000 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3001 it possible to be selective about when SMTP synchronization is enforced.
3003 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3005 32. Implemented hosts_connection_nolog.
3007 33. Added an ACL for QUIT.
3009 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3012 35. Added mailbox_size and mailbox_filecount to appendfile.
3014 36. Added control = no_multiline_responses to ACLs.
3016 37. There was a bug in the logic of the code that waits for the clock to tick
3017 in the case where the clock went backwards by a substantial amount such
3018 that the microsecond fraction of "now" was more than the microsecond
3019 fraction of "then" (but the whole seconds number was less).
3021 38. Added support for the libradius Radius client library this is found on
3022 FreeBSD (previously only the radiusclient library was supported).
3028 1. When certain lookups returned multiple values in the form name=value, the
3029 quoting of the values was not always being done properly. Specifically:
3030 (a) If the value started with a double quote, but contained no whitespace,
3032 (b) If the value contained whitespace other than a space character (i.e.
3033 tabs or newlines or carriage returns) it was not quoted.
3034 This fix has been applied to the mysql and pgsql lookups by writing a
3035 separate quoting function and calling it from the lookup code. The fix
3036 should probably also be applied to nisplus, ibase and oracle lookups, but
3037 since I cannot test any of those, I have not disturbed their existing code.
3039 2. A hit in the callout cache for a specific address caused a log line with no
3040 reason for rejecting RCPT. Now it says "Previous (cached) callout
3041 verification failure".
3043 3. There was an off-by-one bug in the queryprogram router. An over-long
3044 return line was truncated at 256 instead of 255 characters, thereby
3045 overflowing its buffer with the terminating zero. As well as fixing this, I
3046 have increased the buffer size to 1024 (and made a note to document this).
3048 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3049 when Exim is waiting for an SMTP response from a remote server, Exim
3050 restarts its select() call on the socket, thereby resetting its timeout.
3051 This is not a problem when such interrupts are rare. Somebody set up a cron
3052 job to run exiwhat every 2 minutes, which is less than the normal select()
3053 timeout (5 or 10 minutes). This meant that the select() timeout never
3054 kicked in because it was always reset. I have fixed this by comparing the
3055 time when an interrupt arrives with the time at the start of the first call
3056 to select(). If more time than the timeout has elapsed, the interrupt is
3057 treated as a timeout.
3059 5. Some internal re-factoring in preparation for the addition of Sieve
3060 extensions (by MH). In particular, the "personal" test is moved to a
3061 separate function, and given an option for scanning Cc: and Bcc: (which is
3062 not set for Exim filters).
3064 6. When Exim created an email address using the login of the caller as the
3065 local part (e.g. when creating a From: or Sender: header line), it was not
3066 quoting the local part when it contained special characters such as @.
3068 7. Installed new OpenBSD configuration files.
3070 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3071 try to make them clearer.
3073 9. Callout options, other than the timeout value, were being ignored when
3074 verifying sender addresses in header lines. For example, when using
3076 verify = header_sender/callout=no_cache
3078 the cache was (incorrectly) being used.
3080 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3081 only the Cygwin environment.
3083 11. When return_path_on_delivery was set as a log selector, if different remote
3084 addresses in the same message used different return paths and parallel
3085 remote delivery occurred, the wrong values would sometimes be logged.
3086 (Whenever a remote delivery process finished, the return path value from
3087 the most recently started remote delivery process was logged.)
3089 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3090 lines when AUTH and/or TLS are in use. This is the "received protocol"
3091 field. Exim used to use "asmtp" for authenticated SMTP, without any
3092 indication (in the protocol name) for TLS use. Now it follows the RFC and
3093 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3094 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3095 names appear in log lines as well as in Received: header lines.
3097 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3098 extensions, and comparison tests, and to fix some bugs.
3100 14. Changes to the "personal" filter test:
3102 (1) The test was buggy in that it was just doing the equivalent of
3103 "contains" tests on header lines. For example, if a user's address was
3104 anne@some.where, the "personal" test would incorrectly be true for
3106 To: susanne@some.where
3108 This test is now done by extracting each address from the header in turn,
3109 and checking the entire address. Other tests that are part of "personal"
3110 are now done using regular expressions (for example, to check local parts
3111 of addresses in From: header lines).
3113 (2) The list of non-personal local parts in From: addresses has been
3114 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3115 taken from the Sieve specification recommendations.
3117 (3) If the message contains any header line starting with "List-" it is
3118 treated as non-personal.
3120 (4) The test for "circular" in the Subject: header line has been removed
3121 because it now seems ill-conceived.
3123 15. Minor typos in src/EDITME comments corrected.
3125 16. Installed latest exipick from John Jetmore.
3127 17. If headers_add on a router specified a text string that was too long for
3128 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3129 of string_sprintf() is now avoided.
3131 18. $message_body_size was not set (it was always zero) when running the DATA
3132 ACL and the local_scan() function.
3134 19. For the "mail" command in an Exim filter, no default was being set for
3135 the once_repeat time, causing a random time value to be used if "once" was
3136 specified. (If the value happened to be <= 0, no repeat happened.) The
3137 default is now 0s, meaning "never repeat". The "vacation" command was OK
3138 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3139 (I found it when inspecting the code).
3141 20. There is now an overall timeout for performing a callout verification. It
3142 defaults to 4 times the callout timeout, which applies to individual SMTP
3143 commands during the callout. The overall timeout applies when there is more
3144 than one host that can be tried. The timeout is checked before trying the
3145 next host. This prevents very long delays if there are a large number of
3146 hosts and all are timing out (e.g. when the network connections are timing
3147 out). The value of the overall timeout can be changed by specifying an
3148 additional sub-option for "callout", called "maxwait". For example:
3150 verify = sender/callout=5s,maxwait=20s
3152 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3153 to the end before writing, but this should make it even safer).
3155 22. Exim was forgetting that it had advertised PIPELINING for the second and
3156 subsequent messages on an SMTP connection. It was also not resetting its
3157 memory on STARTTLS and an internal HELO.
3159 23. When Exim logs an SMTP synchronization error within a session, it now
3160 records whether PIPELINING has been advertised or not.
3162 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3163 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3164 rather than long int.
3166 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3168 26. Added the never_mail option to autoreply.
3174 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3175 crash if the getsockname() call failed; this can happen if a connection is
3176 closed very soon after it is established. The problem was simply in the
3177 order in which certain operations were done, causing Exim to try to write
3178 to the SMTP stream before it had set up the file descriptor. The bug has
3179 been fixed by making things happen in the correct order.
3185 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3186 before the connection was closed, thus losing the rejection response.
3188 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3189 some early Solaris releases, but causes trouble in current releases where
3190 socklen_t is defined.
3192 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3195 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3198 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3199 that releasing the top of it at the end releases what was used for sub-
3200 expansions (unless the block got too big). However, discard this block if
3201 the first thing is a variable or header, so that we can use its block when
3202 it is dynamic (useful for very large $message_headers, for example).
3204 6. Lookups now cache *every* query, not just the most recent. A new, separate
3205 store pool is used for this. It can be recovered when all lookup caches are
3206 flushed. Lookups now release memory at the end of their result strings.
3207 This has involved some general refactoring of the lookup sources.
3209 7. Some code has been added to the store_xxx() functions to reduce the amount
3210 of flapping under certain conditions.
3212 8. log_incoming_interface used to affect only the <= reception log lines. Now
3213 it causes the local interface and port to be added to several more SMTP log
3214 lines, for example "SMTP connection from", and rejection lines.
3216 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3218 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3220 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3221 could be overwritten at the end of the current message (or the start of a
3222 new message if it was set in a HELO ACL). The value is now preserved for
3223 the duration of the SMTP connection.
3225 12. If a transport had a headers_rewrite setting, and a matching header line
3226 contained an unqualified address, that address was qualified, even if it
3227 did not match any rewriting rules. The underlying bug was that the values
3228 of the flags that permit the existence of unqualified sender and recipient
3229 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3230 non-local messages, and by -bnq for local messages) were not being
3231 preserved with the message after it was received.
3233 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3234 "next input=" as part of the text comprising the host identity instead of
3235 the correct text. The code was using the same buffer for two different
3236 strings. However, depending on which order the printing function evaluated
3237 its arguments, the bug did not always show up. Under Linux, for example, my
3238 test suite worked just fine.
3240 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3241 doesn't work with some older versions of Perl. It has been changed to "my",
3242 which in any case is probably the better facility to use.
3244 15. A really picky compiler found some instances of statements for creating
3245 error messages that either had too many or two few arguments for the format
3248 16. The size of the buffer for calls to the DNS resolver has been increased
3249 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3250 for addresses that have a lot of PTR records. This alleviates a problem; it
3251 does not fully solve it.
3253 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3254 buffer now truncates the list and logs the incident, which is the same
3255 action as happens when Exim is looking up a host name and its aliases.
3256 Previously in this situation something unpredictable would happen;
3257 sometimes it was "internal error: store_reset failed".
3259 18. If a server dropped the connection unexpectedly when an Exim client was
3260 using GnuTLS and trying to read a response, the client delivery process
3261 crashed while trying to generate an error log message.
3263 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3264 string, for example:
3266 warn message = H1: something\nH2: something
3268 the text was added as a single header line from Exim's point of view
3269 though it ended up OK in the delivered message. However, searching for the
3270 second and subsequent header lines using $h_h2: did not work. This has been
3271 fixed. Similarly, if a system filter added multiple headers in this way,
3272 the routers could not see them.
3274 20. Expanded the error message when iplsearch is called with an invalid key to
3275 suggest using net-iplsearch in a host list.
3277 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3278 ACLs are no longer actually imposed (and a message to that effect is
3281 22. If a "gecos" field in a passwd entry contained escaped characters, in
3282 particular, if it contained a \" sequence, Exim got it wrong when building
3283 a From: or a Sender: header from that name. A second bug also caused
3284 incorrect handling when an unquoted " was present following a character
3285 that needed quoting.
3287 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3288 was not being matched caselessly.
3290 24. Arranged for all hyphens in the exim.8 source to be escaped with
3293 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3294 properly. Recipient callout cache records were still being keyed to include
3295 the sender, even when use_sender was set false. This led to far more
3296 callouts that were necessary. The sender is no longer included in the key
3297 when use_sender is false.
3299 26. Added "control = submission" modifier to ACLs.
3301 27. Added the ${base62d: operator to decode base 62 numbers.
3303 28. dnsdb lookups can now access SRV records.
3305 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3306 the configuration file.
3308 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3309 (-v) mode. This makes the output for a verbose queue run more intelligible.
3311 31. Added a use_postmaster feature to recipient callouts.
3313 32. Added the $body_zerocount variable, containing the number of binary zero
3314 bytes in the message body.
3316 33. The time of last modification of the "new" subdirectory is now used as the
3317 "mailbox time last read" when there is a quota error for a maildir
3320 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3322 35. Added +ignore_unknown as a special item in host lists.
3324 36. Code for decoding IPv6 addresses in host lists is now included, even if
3325 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3326 address was recognized as an IP address, but was then not correctly decoded
3327 into binary, causing unexpected and incorrect effects when compared with
3334 1. Very minor rewording of debugging text in manualroute to say "list of
3335 hosts" instead of "hostlist".
3337 2. If verify=header_syntax was set, and a header line with an unqualified
3338 address (no domain) and a large number of spaces between the end of the
3339 name and the colon was received, the reception process suffered a buffer
3340 overflow, and (when I tested it) crashed. This was caused by some obsolete
3341 code that should have been removed. The fix is to remove it!
3343 3. When running in the test harness, delay a bit after writing a bounce
3344 message to get a bit more predictability in the log output.
3346 4. Added a call to search_tidyup() just before forking a reception process. In
3347 theory, someone could use a lookup in the expansion of smtp_accept_max_
3348 per_host which, without the tidyup, could leave open a database connection.
3350 5. Added the variables $recipient_data and $sender_data which get set from a
3351 lookup success in an ACL "recipients" or "senders" condition, or a router
3352 "senders" option, similar to $domain_data and $local_part_data.
3354 6. Moved the writing of debug_print from before to after the "senders" test
3357 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3358 problems for message scanning, either using a data ACL, or using
3359 local_scan() because the Received: header was not generated till after they
3360 were called (in order to set the time as the time of reception completion).
3361 I have revised the way this works. The header is now generated after the
3362 body is received, but before the ACL or local_scan() are called. After they
3363 are run, the timestamp in the header is updated.
3369 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3370 before starting a queue runner without re-exec. This happened only when
3371 deliver_drop_privilege was set or when the Exim user was set to root. The
3372 effect of the bug was that timeouts during subsequent deliveries caused
3373 crashes instead of being properly handled. The handler is now left at its
3374 default (and expected) setting.
3376 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3377 message, again when deliver_drop_privilege is set or Exim is run as root.
3378 The bug described in (1) was not present in this case, but the tidying up
3379 of the other signals was missing. I have made the two cases consistent.
3381 3. The ignore_target_hosts setting on a manualroute router was being ignored
3382 for hosts that were looked up using the /MX notation.
3384 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3387 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3388 operated on the sender address. After changing the $sender_address to <>
3389 for the sender address verify, Exim was re-instated it as the original
3390 (before rewriting) address, but remembering that it had rewritten it, so it
3391 wasn't rewriting it again. This bug also had the effect of breaking the
3392 sender address verification caching when the sender address was rewritten.
3394 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3395 This has been changed so that if the ip literal address matches
3396 ignore_target_hosts, the router declines.
3398 7. Added expansion conditions match_domain, match_address, and match_local_
3399 part (NOT match_host).
3401 8. The placeholder for the Received: header didn't have a length field set.
3403 9. Added code to Exim itself and to exim_lock to test for a specific race
3404 condition that could lead to file corruption when using MBX delivery. The
3405 issue is with the lockfile that is created in /tmp. If this file is removed
3406 after a process has opened it but before that process has acquired a lock,
3407 there is the potential for a second process to recreate the file and also
3408 acquire a lock. This could lead to two Exim processes writing to the file
3409 at the same time. The added code performs the same test as UW imapd; it
3410 checks after acquiring the lock that its file descriptor still refers to
3411 the same named file.
3413 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3414 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3417 11. Added the smtp_active_hostname option. If used, this will typically be made
3418 to depend on the incoming interface address. Because $interface_address is
3419 not set up until the daemon has forked a reception process, error responses
3420 that can happen earlier (such as "too many connections") no longer contain
3423 12. If an expansion in a condition on a "warn" statement fails because a lookup
3424 defers, the "warn" statement is abandoned, and the next ACL statement is
3425 processed. Previously this caused the whole ACL to be aborted.
3427 13. Added the iplsearch lookup type.
3429 14. Added ident_timeout as a log selector.
3431 15. Added tls_certificate_verified as a log selector.
3433 16. Added a global option tls_require_ciphers (compare the smtp transport
3434 option of the same name). This controls incoming TLS connections.
3436 17. I finally figured out how to make tls_require_ciphers do a similar thing
3437 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3438 before starting the TLS session.
3440 18. Tabs are now shown as \t in -bP output.
3442 19. If the log selector return_path_on_delivery was set, Exim crashed when
3443 bouncing a message because it had too many Received: header lines.
3445 20. If two routers both had headers_remove settings, and the first one included
3446 a superfluous trailing colon, the final name in the first list and the
3447 first name in the second list were incorrectly joined into one item (with a
3448 colon in the middle).
3454 1. Added -C and -D options to the exinext utility, mainly to make it easier
3455 to include in the automated testing, but these could be helpful when
3456 multiple configurations are in use.
3458 2. The exinext utility was not formatting the output nicely when there was
3459 an alternate port involved in the retry record key, nor when there was a
3460 message id as well (for retries that were specific to a specific message
3461 and a specific host). It was also confused by IPv6 addresses, because of
3462 the additional colons they contain. I have fixed the IPv4 problem, and
3463 patched it up to do a reasonable job for IPv6.
3465 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3466 delivery, the log line now contains "pipelined" if PIPELINING was used.
3468 4. An SMTP transport process used to panic and die if the bind() call to set
3469 an explicit outgoing interface failed. This has been changed; it is now
3470 treated in the same way as a connect() failure.
3472 5. A reference to $sender_host_name in the part of a conditional expansion
3473 that was being skipped was still causing a DNS lookup. This no longer
3476 6. The def: expansion condition was not recognizing references to header lines
3477 that used bh_ and bheader_.
3479 7. Added the _cache feature to named lists.
3481 8. The code for checking quota_filecount in the appendfile transport was
3482 allowing one more file than it should have been.
3484 9. For compatibility with Sendmail, the command line option
3492 and sets the incoming protocol and host name (for trusted callers). The
3493 host name and its colon can be omitted when only the protocol is to be set.
3494 Note the Exim already has two private options, -pd and -ps, that refer to
3495 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3496 "s", but I don't think that's a major issue.
3498 10. A number of refactoring changes to the code, none of which should affect
3501 (a) The number of logging options was getting close to filling up the
3502 32-bit word that was used as a bit map. I have split them into two classes:
3503 those that are passed in the argument to log_write(), and those that are
3504 only ever tested independently outside of that function. These are now in
3505 separate 32-bit words, so there is plenty of room for expansion again.
3506 There is no change in the user interface or the logging behaviour.
3508 (b) When building, for example, log lines, the code previously used a
3509 macro that called string_cat() twice, in order to add two strings. This is
3510 not really sufficiently general. Furthermore, there was one instance where
3511 it was actually wrong because one of the argument was used twice, and in
3512 one call a function was used. (As it happened, calling the function twice
3513 did not affect the overall behaviour.) The macro has been replaced by a
3514 function that can join an arbitrary number of extra strings onto a growing
3517 (c) The code for expansion conditions now uses a table and a binary chop
3518 instead of a serial search (which was left over from when there were very
3519 few conditions). Also, it now recognizes conditions like "pam" even when
3520 the relevant support is not compiled in: a suitably worded error message is
3521 given if an attempt is made to use such a condition.
3523 11. Added ${time_interval:xxxxx}.
3525 12. A bug was causing one of the ddress fields not to be passed back correctly
3526 from remote delivery subprocesses. The field in question was not being
3527 subsequently used, so this caused to problems in practice.
3529 13. Added new log selectors queue_time and deliver_time.
3531 14. Might have fixed a bug in maildirsizefile handling that threw up
3532 "unexpected character" debug warnings, and recalculated the data
3533 unnecessarily. In any case, I expanded the warning message to give more
3536 15. Added the message "Restricted characters in address" to the statements in
3537 the default ACL that block characters like @ and % in local parts.
3539 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3540 Three changes have been made:
3542 (a) There was a serious bug; a negative response to MAIL caused the whole
3543 recipient domain to be cached as invalid, thereby blocking all messages
3544 to all local parts at the same domain, from all senders. This bug has
3545 been fixed. The domain is no longer cached after a negative response to
3546 MAIL if the sender used is not empty.
3548 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3551 (c) A new callout option, "use_sender" has been added for people who want
3552 the modified behaviour.
3558 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3561 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3562 indeed breaks things for older releases.
3564 3. Added additional logging to the case where there is a problem reading data
3565 from a filter that is running in a subprocess using a pipe, in order to
3566 try to track down a specific problem.
3568 4. Testing facility fudge: when running in the test harness and attempting
3569 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3570 getting "No route to host". Convert this to a timeout.
3572 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3575 6. Some OS don't have socklen_t but use size_t instead. This affects the
3576 fifth argument of getsockopt() amongst other things. This is now
3577 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3578 can be set for individual OS. I have set it for SunOS5, OSF1, and
3579 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3580 some earlier ones do not.
3582 7. Change 4.30/15 was not doing the test caselessly.
3584 8. The standard form for an IPv6 address literal was being rejected by address
3585 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3586 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3587 this, as well as the form without the "IPv6" on the front (but only when
3588 address literals are enabled, of course).
3590 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3592 10. Exim crashed if a message with an empty sender address specified by -f
3593 encountered a router with an errors_to setting. This could be provoked only
3594 by a command such as
3598 where an empty string was supplied; "<>" did not hit this bug.
3600 11. Installed PCRE release 4.5.
3602 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3603 remained set. It is now erased.
3605 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3606 times from message ids (which are base 36 rather than the normal 62).
3608 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3609 were being counted as actual protocol errors, and logged if the log
3610 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3611 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3612 and DATA following a set of rejected RCPTs do not count as protocol errors.
3613 In other words, Exim assumes they were pipelined, though this may not
3614 actually be the case. Of course, in all cases the client gets an
3615 appropriate error code.
3617 15. If a lookup fails in an ACL condition, a message about the failure may
3618 be available; it is used if testing the ACL cannot continue, because most
3619 such messages specify what the cause of the deferral is. However, some
3620 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3621 that caused an old message to be retained and used if a later statement
3622 caused a defer, replacing the real cause of the deferral.
3624 16. If an IP address had so many PTR records that the DNS lookup buffer
3625 was not large enough to hold them, Exim could crash while trying to process
3626 the truncated data. It now detects and logs this case.
3628 17. Further to 4.21/58, another change has been made: if (and only if) the
3629 first line of a message (the first header line) ends with CRLF, a bare LF
3630 in a subsequent header line has a space inserted after it, so as not to
3631 terminate the header.
3633 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3634 unnecessarily, used atoi() instead of strtol(), and didn't check the
3635 termination when getting file sizes from file names by regex.
3637 19. Completely re-implemented the support for maildirsize files, in the light
3638 of a number of problems with the previous contributed implementation
3639 (4.30/29). In particular:
3641 . If the quota is zero, the maildirsize file is maintained, but no quota is
3644 . If the maildir directory does not exist, it is created before any attempt
3645 to write a maildirsize file.
3647 . The quota value in the file is just a cache; if the quota is changed in
3648 the transport, the new value overrides.
3650 . A regular expression is available for excluding directories from the
3653 20. The autoreply transport checks the characters in options that define the
3654 message's headers; it allows continued headers, but it was checking with
3655 isspace() after an embedded newline instead of explicitly looking for a
3658 21. If all the "regular" hosts to which an address was routed had passed their
3659 expiry times, and had not reached their retry times, the address was
3660 bounced, even if fallback hosts were defined. Now Exim should go on to try
3663 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3664 equivalent code in the SMTP transport. Some hosts send humungous responses
3665 to HELO/EHLO, more than 1024 it seems.
3667 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3668 gives compiler warnings in some environments. I've now done it "properly",
3671 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3672 (because of problems with the built-in one) was declared to return uschar *
3673 instead of char *, causing compiler failure.
3675 25. Fixed a file descriptor leak when processing alias/forward files.
3677 26. Fixed a minor format string issue in dbfn.c.
3679 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3681 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3682 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3685 29. When a sender address is verified, it is cached, to save repeating the test
3686 when there is more than one recipient in a message. However, when the
3687 verification involves a callout, it is possible for different callout
3688 options to be set for different recipients. It is too complicated to keep
3689 track of this in the cache, so now Exim always runs a verification when a
3690 callout is required, relying on the callout cache for the optimization.
3691 The overhead is duplication of the address routing, but this should not be
3694 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3695 to be verified with callout=postmaster, and the main callout worked but the
3696 postmaster check failed, the verification correctly failed. However, if a
3697 subsequent RCPT command asked for sender verification *without* the
3698 postmaster check, incorrect caching caused this verification also to fail,
3701 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3702 it was not caching the DNS options (qualify_single, search_parents) that
3703 were used when the lookup failed. A subsequent lookup with different
3704 options therefore always gave the same answer, though there were cases
3705 where it should not have. (Example: a "domains = !$mx_any" option on a
3706 dnslookup router: the "domains" option is always processed without any
3707 widening, but the router might have qualify_single set.) Now Exim uses the
3708 cached value only when the same options are set.
3710 32. Added John Jetmore's "exipick" utility to the distribution.
3712 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3713 than a timeout (e.g. a certificate is required, and is not provided), an
3714 Exim server now closes the connection immediately. Previously it waited for
3715 the client to close - but if the client is SSL, it seems that they each
3716 wait for each other, leading to a delay before one of them times out.
3718 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3719 maintained 0.8.x compatibility because I don't think many are using it, and
3720 it is clearly obsolete.
3722 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3725 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3726 client certificate was expired. A simple patch fixes this, though I don't
3727 understand the full logic of why the verify callback is called multiple
3730 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3731 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3732 which causes problems with some clients (such as the Certicom SSL Plus
3733 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3734 disables the coutermeasure allowing Eudora to connect."
3736 38. Exim was not checking that a write() to a log file succeeded. This could
3737 lead to Bad Things if a log got too big, in particular if it hit a file
3738 size limit. Exim now panics and dies if it cannot write to a log file, just
3739 as it does if it cannot open a log file.
3741 39. Modified OS/Makefile-Linux so that it now contains
3743 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3745 The two -D definitions ensure that Exim is compiled with large file
3746 support, which makes it possible to handle log files that are bigger than
3749 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3750 instance) a domain was checked against a named list that involved a lookup,
3751 causing $domain_data to be set, then another domain was checked against the
3752 same list, then the first domain was re-checked, the value of $domain_data
3753 after the final check could be wrong. In particular, if the second check
3754 failed, it could be set empty. This bug probably also applied to
3757 41. The strip_trailing_dot option was not being applied to the address given
3758 with the -f command-line option.
3760 42. The code for reading a message's header from the spool was incrementing
3761 $received_count, but never initializing it. This meant that the value was
3762 incorrect (doubled) while delivering a message in the same process in which
3763 it was received. In the most common configuration of Exim, this never
3764 happens - a fresh exec is done - but it can happen when
3765 deliver_drop_privilege is set.
3767 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3768 it now includes up to 150 characters of the unexpected data in the log
3771 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3772 and building data strings. The size of both of these buffers was 10 000
3773 bytes - far larger than anybody would *ever* want, thought I. Needless to
3774 say, somebody hit the limit. I have increased the maximum line length to
3775 20 000 and the maximum data length of concatenated lines to 100 000. I have
3776 also fixed two bugs, because there was no checking on these buffers. Tsk,
3777 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3778 buffer is too small.
3780 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3781 lsearch lookups. Now it does.
3783 46. When parsing a route_list item in a manualroute router, a fixed-length
3784 buffer was used for the list of hosts. I made this 1024 bytes long,
3785 thinking that nobody would ever have a list of hosts that long. Wrong.
3786 Somebody had a whole pile of complicated expansion conditions, and the
3787 string was silently truncated, leading to an expansion error. It turns out
3788 that it is easier to change to an unlimited length (owing to other changes
3789 that have happened since this code was originally written) than to build
3790 structure for giving a limitation error. The length of the item that
3791 expands into the list of hosts is now unlimited.
3793 47. The lsearch lookup could not handle data where the length of text line was
3794 more than 4095 characters. Such lines were truncated, leading to shortened
3795 data being returned. It should now handle lines of any length.
3797 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3798 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3801 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3802 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3803 no longer happens in comment lines. A list of replacements is now placed
3804 at the head of all of the source files, except those whose only change is
3805 to replace PERL_COMMAND in the very first #! line.
3807 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3808 messages on the queue, with a bottom-up merge sort, using code contributed
3809 by Michael Haardt. This should make operations like -bp somewhat faster on
3810 large queues. It won't affect queue runners, except when queue_run_in_order
3813 51. Installed eximstats 1.31 in the distribution.
3815 52. Added support for SRV lookups to the dnslookup router.
3817 53. If an ACL referred to $message_body or $message_body_end, the value was not
3818 reset for any messages that followed in the same SMTP session.
3820 54. The store-handling optimization for building very long strings was not
3821 differentiating between the different store pools. I don't think this
3822 actually made any difference in practice, but I've tidied it.
3824 55. While running the routers to verify a sender address, $sender_address
3825 was still set to the sender address. This is wrong, because when routing to
3826 send a bounce to the sender, it would be empty. Therefore, I have changed
3827 it so that, while verifying a sender address, $sender_address is set to <>.
3828 (There is no change to what happens when verifying a recipient address.)
3830 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3831 target A or AAAA records (if not already returned) without resetting the
3832 qualify_single or search_parents options of the DNS resolver. These are
3833 inappropriate in this case because the targets of MX and SRV records must
3834 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3835 target that, when qualified, matched something in the local domain. These
3836 two options are now turned off when doing these lookups.
3838 57. It seems that at least some releases of Reiserfs (which does not have the
3839 concept of a fixed number of inodes) returns zero and not -1 for the
3840 number of available inodes. This interacted badly with check_spool_inodes,
3841 which assumed that -1 was the "no such thing" setting. What I have done is
3842 to check that the total number of inodes is greater than zero before doing
3843 the test of how many are available.
3845 58. When a "warn" ACL statement has a log_message modifier, the message is
3846 remembered, and not repeated. This is to avoid a lot of repetition when a
3847 message has many recipients that cause the same warning to be written.
3848 Howewer, Exim was preserving the list of already written lines for an
3849 entire SMTP session, which doesn't seem right. The memory is now reset if a
3850 new message is started.
3852 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3853 debugging output unless log_rewrite was also set.
3855 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3856 of (int)(handle) when we know that handle contains (void *)(-1).
3858 61. The Exim daemon panic-logs an error return when it closes the incoming
3859 connection. However "connection reset by peer" seems to be common, and
3860 isn't really an error worthy of noting specially, so that particular error
3863 62. When Exim is trying to find all the local interfaces, it used to panic and
3864 die if the ioctl to get the interface flags failed. However, it seems that
3865 on at least one OS (Solaris 9) it is possible to have an interface that is
3866 included in the list of interfaces, but for which you get a failure error
3867 for this call. This happens when the interface is not "plumbed" into a
3868 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3869 failure of the "get flags" call assumes that the interface is down.
3871 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3872 makes life easier for people who are doing arithmetic on fields extracted
3873 from dates, where you often get leading zeros that should not be
3874 interpreted as octal.
3876 64. Added qualify_domain to the redirect router, to override the global
3879 65. If a pathologically long header line contained very many addresses (the
3880 report of this problem mentioned 10 000) and each of them was rewritten,
3881 Exim could use up a very large amount of memory. (It kept on making new
3882 copies of the header line as it rewrote, and never released the old ones.)
3883 At the expense of a bit more processing, the header rewriting function has
3884 been changed so that it no longer eats memory in this way.
3886 66. The generation of the Received: header has been moved from the time that a
3887 message starts to be received, to the time that it finishes. The timestamp
3888 in the Received: header should now be very close to that of the <= log
3889 line. There are two side-effects of this change:
3891 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3892 logged header lines no longer include the local Received: line, because
3893 it has not yet been created. The same applies to a copy of the message
3894 that is returned to a non-SMTP sender when a message is rejected.
3896 (b) When a filter file is tested using -bf, no additional Received: header
3897 is added to the test message. After some thought, I decided that this
3900 This change does not affect the value of $received_for. It is still set
3901 after address rewriting, but before local_scan() is called.
3903 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3905 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3906 gave an unhelpful panic error message, and a defer error. I have managed to
3907 change this behaviour so that it now rejects any supplied certificate,
3908 which seems right, as the list of acceptable certificates is empty.
3910 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3911 gave an unhelpful defer error. I have not managed to make this reject any
3912 supplied certificates, but the error message it gives is "no certificate
3913 supplied", which is not helpful.
3915 70. exigrep's output now also includes lines that are not associated with any
3916 message, but which match the given pattern. Implemented by a patch from
3917 Martin Sluka, which also tidied up the Perl a bit.
3919 71. Recipient callout verification, like sender verification, was using <> in
3920 the MAIL FROM command. This isn't really the right thing, since the actual
3921 sender may affect whether the remote host accepts the recipient or not. I
3922 have changed it to use the actual sender in the callout; this means that
3923 the cache record is now keyed on a recipient/sender pair, not just the
3924 recipient address. There doesn't seem to be a real danger of callout loops,
3925 since a callout by the remote host to check the sender would use <>.
3926 [SEE ABOVE: changed after hitting problems.]
3928 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3929 temporary errors. However, in the case of such a code being given after
3930 the end of a data transmission (i.e. after ".") Exim was failing to write
3931 a retry record for the message. (Yes, there was some broken host that was
3932 actually sending 8xx at this point.)
3934 73. An unknown lookup type in a host list could cause Exim to panic-die when
3935 the list was checked. (An example that provoked this was putting <; in the
3936 middle of a list instead of at the start.) If this happened during a DATA
3937 ACL check, a -D file could be left lying around. This kind of configuration
3938 error no longer causes Exim to die; instead it causes a defer errror. The
3939 incident is still logged to the main and panic logs.
3941 74. Buglet left over from Exim 3 conversion. The message "too many messages
3942 in one connection" was written to the rejectlog but not the mainlog, except
3943 when address rewriting (yes!) was being logged.
3945 75. Added write_rejectlog option.
3947 76. When a system filter was run not as root (that is, when system_filter_user
3948 was set), the values of the $n variables were not being returned to the
3949 main process; thus, they were not subsequently available in the $sn
3952 77. Added +return_path_on_delivery log selector.
3954 78. A connection timeout was being treated differently from recipients deferred
3955 when testing hosts_max_try with a message that was older than the host's
3956 retry timeout. (The host should not be counted, thus allowing all hosts to
3957 be tried at least once before bouncing.) This may have been the cause of an
3958 occasionally reported bug whereby a message would remain on the queue
3959 longer than the retry timeout, but would be bounced if a delivery was
3960 forced. I say "may" because I never totally pinned down the problem;
3961 setting up timeout/retry tests is difficult. See also the next item.
3963 79. The ultimate address timeout was not being applied to errors that involved
3964 a combination of host plus message (for example, a timeout on a MAIL
3965 command). When an address resolved to a number of possible hosts, and they
3966 were not all tried for each delivery (e.g. because of hosts_max_try), a
3967 message could remain on the queue longer than the retry timeout.
3969 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3972 81. Fixed an obscure SMTP outgoing bug which required at least the following
3973 conditions: (a) there was another message waiting for the same server;
3974 (b) the server returned 5xx to all RCPT commands in the first message so
3975 that the message was not completed; (c) the server dropped the connection
3976 or gave a negative response to the RSET that Exim sends to abort the
3977 transaction. The observed case was a dropped connection after DATA that had
3978 been sent in pipelining mode. That is, the server had advertised PIPELINING
3979 but was not implementing it correctly. The effect of the bug was incorrect
3980 behaviour, such as trying another host, and this could lead to a crash.
3986 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3987 and daemon.c were passed as pointers to ints; they should have been
3988 pointers to socklen_t variables (which are typically unsigned ints).
3990 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3993 3. Fixed a really odd bug that affected only the testing scheme; patching a
3994 certain fixed string in the binary changed the value of another string that
3995 happened to be identical to the end of the original first string.
3997 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3998 name", it returns that address as the IP address. On some operating
3999 systems (e.g. Solaris), it also passes back the IP address string as the
4000 "host name". However, on others (e.g. Linux), it passes back an empty
4001 string. Exim wasn't checking for this, and was changing the host name to an
4002 empty string, assuming it had been canonicized.
4004 5. Although rare, it is permitted to have more than one PTR record for a given
4005 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4006 all the names associated with an address, because they do in Solaris.
4007 However, it seems that they do not in Linux for data that comes from the
4008 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4009 I found this out when I moved to a new Linux workstation and tried to run
4010 the Exim test suite.
4012 To get round this problem I have changed the code so that it now does its
4013 own call to the DNS to look up PTR records when searching for a host name.
4014 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4015 addresses that are only in /etc/hosts are still found.
4017 This behaviour is, however, controlled by an option called host_lookup_
4018 order, which defaults to "bydns:byaddr". If people want to use the other
4019 order, or indeed, just use one or the other means of lookup, they can
4020 specify it in this variable.
4022 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4023 some operating systems, this comes back from gethostbyaddr() as an empty
4024 string, and this is what Exim used to test for. However, it seems that in
4025 other systems, "." is yielded. Exim now tests for this case too.
4027 7. The values of check_spool_space and check_log_space are now held internally
4028 as a number of kilobytes instead of an absolute number of bytes. If a
4029 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4030 kilobyte. This means that much larger values can be stored.
4032 8. Exim monitor: an attempt to get the action menu when not actually pointing
4033 at a message produces an empty menu entitled "No message selected". This
4034 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4035 no entries in it ("Shell widget menu has zero width and/or height"). So I
4036 have added a single, blank menu entry in this case.
4038 9. Added ${quote_local_part.
4040 10. MIME decoding is now applied to the contents of Subject: header lines when
4043 11. Now that a reference to $sender_host_address automatically causes a reverse
4044 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4045 host lookup before query-style lookups in lists that might use this
4046 variable. This has therefore been abolished, and the "net-" prefix is no
4047 longer necessary for query-style lookups.
4049 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4050 have been a typo for LFLAGS, so it has been changed.
4052 13. The install script calls Exim with "-C /dev/null" in order to find the
4053 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4054 to be output. Howeve, since Exim outputs its version number before the
4055 error, it didn't break the script. It just looked ugly. I fixed this by
4056 always allowing "-C /dev/null" if the caller is root.
4058 14. Ignore overlarge ACL variable number when reading spool file - insurance
4059 against a later release with more variables having written the file.
4061 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4062 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4063 this, as well as the form without the "IPv6" on the front.
4065 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4066 OS/Makefile-Darwin file.
4068 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4069 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4071 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4072 variable. However, some OS use ints for inodes. I've added cast to long int
4073 to get rid of the compiler warning.
4075 19. I had forgotten to lock out "/../" in configuration file names when
4076 ALT_CONFIG_PREFIX was set.
4078 20. Routers used for verification do not need to specify transports. However,
4079 if such a router generated a host list, and callout was configured, Exim
4080 crashed, because it could not find a port number from the (non-existent)
4081 transport. It now assumes port 25 in this circumstance.
4083 21. Added the -t option to exigrep.
4085 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4086 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4087 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4088 them is set, LOOKUP_LSEARCH is forced.
4090 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4092 24. Added sender and host information to the "rejected by local_scan()" log
4093 line; previously there was no indication of these.
4095 25. Added .include_if_exists.
4097 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4098 Linux. It turns out that not all file systems support this. Apparently some
4099 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4100 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4101 not supported on the file descriptor, is now ignored when Exim is trying to
4102 sync a directory. This applies only to Linux.
4104 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4106 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4107 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4110 29. Added support for maildirsize files from supplied patch (modified a bit).
4112 30. The use of :fail: followed by an empty string could lead Exim to respond to
4113 sender verification failures with (e.g.):
4115 550 Verification failed for <xxx>
4116 550 Sender verify failed
4118 where the first response line was missing the '-' that indicates it is not
4119 the final line of the response.
4121 31. The loop for finding the name of the user that called Exim had a hardwired
4122 limit of 10; it now uses the value of finduser_retries, which is used for
4123 all other user lookups.
4125 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4128 33. Exim was neglecting to zero errno before one call of strtol() when
4129 expanding a string and expecting an integer value. On some systems this
4130 resulted in spurious "integer overflow" errors. Also, it was casting the
4131 result into an int without checking.
4133 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4134 did not work. The code looks as if it has *never* worked, though it appears
4135 to have been documented since at least releast 1.62. I have made it work.
4137 35. The "timeout_DNS" error in retry rules, also documented since at least
4138 1.62, also never worked. As it isn't clear exactly what this means, and
4139 clearly it isn't a major issue, I have abolished the feature by treating it
4140 as "timeout", and writing a warning to the main and panic logs.
4142 36. The display of retry rules for -brt wasn't always showing the error code
4145 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4146 timeout_connect_A, timeout_connect_MX.
4148 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4149 to the empty sender.
4151 39. The daemon was not analysing the content of -oX till after it had closed
4152 stderr and disconnected from the controlling terminal. This meant that any
4153 syntax errors were only noted on the panic log, and the return code from
4154 the command was 0. By re-arranging the code a little, I've made the
4155 decoding happen first, so such errors now appear on stderr, and the return
4156 code is 1. However, the actual setting up of the sockets still happens in
4157 the disconnected process, so errors there are still only recorded on the
4160 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4161 connections (as happens on some IP stacks) was logged at start up time as
4162 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4163 it from "IPv6 and IPv4", which means that two separate sockets are being
4166 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4167 says whether AF_INET or AF_INET6 was passed as an argument.
4169 42. Exiwhat output was messed up when time zones were included in log
4172 43. Exiwhat now gives more information about the daemon's listening ports,
4173 and whether -tls-on-connect was used.
4175 44. The "port" option of the smtp transport is now expanded.
4177 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4178 silently ignored. Now an error message is written to the main and panic
4181 46. There's a new ACL modifier called "logwrite" which writes to a log file
4182 as soon as it is encountered.
4184 47. Added $local_user_uid and $local_user_gid at routing time.
4186 48. Exim crashed when trying to verify a sender address that was being
4189 49. Exim was recognizing only a space character after ".include". It now also
4190 recognizes a tab character.
4192 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4193 extracting the relevant information from the specification. The man page no
4194 longer contains scrambled data for the -d option, and I've added a section
4195 at the front about calling Exim under different names.
4197 51. Added "extra_headers" argument to the "mail" command in filter files.
4199 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4202 53. Installed eximstats 1.29.
4204 54. Added transport_filter_timeout as a generic transport option.
4206 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4207 Cc: header lines. This was required by RFC 822, but it not required by RFC
4210 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4211 incoming messages that did not have them. Now it does so only if the
4212 message originates locally, that is, if there is no associated remote host
4213 address. When Resent- header lines are present, this applies to the Resent-
4214 lines rather than the non-Resent- lines.
4216 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4217 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4219 58. Messages for configuration errors now include the name of the main
4220 configuration file - useful now that there may be more than one file in a
4221 list (.included file names were always shown).
4223 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4224 for those rare installations that do not start the daemon as root or run it
4225 setuid root. I've cut out the call to initgroups() if the daemon is not
4228 60. The Exim user and group can now be bound into the binary as text strings
4229 that are looked up at the start of Exim's processing.
4231 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4233 62. Added $mailstore_basename variable.
4235 63. Installed patch to sieve.c from Michael Haardt.
4237 64. When Exim failed to open the panic log after failing to open the main log,
4238 the original message it was trying to log was written to stderr and debug
4239 output, but if they were not available (the usual case in production), it
4240 was lost. Now it is written to syslog before the two lines that record the
4241 failures to open the logs.
4243 65. Users' Exim filters run in subprocesses under the user's uid. It is
4244 possible for a "deliver" command or an alias in a "personal" command to
4245 provoke an address rewrite. If logging of address rewriting is configured,
4246 this fails because the process is not running as root or exim. There may be
4247 a better way of dealing with this, but for the moment (because 4.30 needs
4248 to be released), I have disabled address rewrite logging when running a
4249 filter in a non-root, non-exim process.
4255 1. The buildconfig auxiliary program wasn't quoting the value set for
4256 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4257 not defined. This bug was masked in 4.22 by the effect that was fixed in
4260 2. Some messages that were rejected after a message id was allocated were
4261 shown as "incomplete" by exigrep. It no longer does this for messages that
4262 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4264 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4265 have allow_domain_literals set, the ID did not get logged in the <= line.
4266 Domain literals are now always recognized in Message-ID: header lines.
4268 4. The first argument for a ${extract expansion item is the key name or field
4269 number. Leading and trailing spaces in this item were not being ignored,
4270 causing some misleading effects.
4272 5. When deliver_drop_privilege was set, single queue runner processes started
4273 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4274 same command in the process it spins off) were not dropping privilege.
4276 6. When the daemon running as "exim" started a queue runner, it always
4277 re-executed Exim in the spun-off process. This is a waste of effort when
4278 deliver_drop_privilege is set. The new process now just calls the
4279 queue-runner function directly.
4285 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4288 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4289 ignored. Though the use of -oP was forcing the writing of a pid file, it
4290 was always written to the default place.
4292 3. If the message "no IP address found for host xxxx" is generated during
4293 incoming verification, it is now followed by identification of the incoming
4294 connection (so you can more easily find what provoked it).
4296 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4298 5. Added some features to "harden" Exim a bit more against certain attacks:
4300 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4301 be put in Local/Makefile. This is like the never_users runtime option,
4302 but it cannot be overridden. The default setting is "root".
4304 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4305 prefix string with which any file named in a -C command line option
4308 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4309 is retained for -C and -D only if the caller of Exim is root. Without
4310 it, the exim user may also use -C and -D and retain privilege.
4312 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4313 command line option is disabled.
4315 6. Macro names set by the -D option must start with an upper case letter, just
4316 like macro names defined in the configuration file.
4318 7. Added "dereference=" facility to LDAP.
4320 8. Two instances of the typo "uknown" in the source files are fixed.
4322 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4323 the Configure-Makefile script screwed up while processing it.
4325 10. Incorporated PCRE 4.4.
4327 11. The SMTP synchronization check was not operating right at the start of an
4328 SMTP session. For example, it could not catch a HELO sent before the client
4329 waited for the greeting. There is now a check for outstanding input at the
4330 point when the greeting is written. Because of the duplex, asynchronous
4331 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4332 way, but not yet received, when the check is performed.
4334 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4335 on TCP/IP sockets, because this apparently causes some broken clients to
4338 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4339 unchanged) from the Cygwin maintainer.
4341 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4342 was supported instead of testing for mbx. Effectively a typo.
4344 15. The spa authenticator server code was not checking that the input it
4345 received was valid base64.
4347 16. The debug output line for the "set" modifier in ACLs was not showing the
4348 name of the variable that was being set.
4350 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4352 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4353 lookup on its own. Something else was needed to trigger the lookup. For
4354 example, a match in host_lookup or the need for a host name in a host list.
4355 Now, if $sender_host_name is referenced and the host name has not yet been
4356 looked up, a lookup is performed. If the lookup fails, the variable remains
4357 empty, and $host_lookup_failed is set to "1".
4359 19. Added "eqi" as a case-independent comparison operator.
4361 20. The saslauthd authentication condition could segfault if neither service
4362 nor realm was specified.
4364 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4365 error message that was logged was misleading, and incoming SMTP
4366 connections were dropped. The message is now more accurate, and temporary
4367 errors are given to SMTP connections.
4369 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4370 (except RSET) with a 421 error, until QUIT is received. However, it was
4371 failing to send a response to QUIT.
4373 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4374 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4375 ACL is now run after the helo_try_verify_hosts code.
4377 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4378 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4379 case-independent, so other case variants are also recognized). Apparently
4380 some systems use these upper case variants.
4382 25. If more than two messages were waiting for the same host, and a transport
4383 filter was specified for the transport, Exim sent two messages over the
4384 same TCP/IP connection, and then failed with "socket operation on non-
4385 socket" when it tried to send the third.
4387 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4389 27. The extern definition of crypt16() in expand.c was not being excluded when
4390 the OS had its own crypt16() function.
4392 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4393 as a preferred synonym for return_size_limit, both as an option and as an
4396 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4398 30. Changed the default configuration ACL to relax the local part checking rule
4399 for addresses that are not in any local domains. For these addresses,
4400 slashes and pipe symbols are allowed within local parts, but the sequence
4401 /../ is explicitly forbidden.
4403 31. SPA server authentication was not clearing the challenge buffer before
4406 32. log_message in a "warn" ACL statement was writing to the reject log as
4407 well as to the main log, which contradicts the documentation and doesn't
4408 seem right (because no rejection is happening). So I have stopped it.
4410 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4411 However, I am unable to do any testing of this.
4413 34. Fixed an infelicity in the appendfile transport. When checking directories
4414 for a mailbox, to see if any needed to be created, it was accidentally
4415 using path names with one or more superfluous leading slashes; tracing
4416 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4418 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4419 contents are added to the log line that is written for every discarded
4420 recipient. (Previously a log_message setting was ignored.)
4422 36. The ${quote: operator now quotes the string if it is empty.
4424 37. The install script runs exim in order to find its version number. If for
4425 some reason other than non-existence or emptiness, which it checks, it
4426 could not run './exim', it was installing it with an empty version number,
4427 i.e. as "exim-". This error state is now caught, and the installation is
4430 38. An argument was missing from the function that creates an error message
4431 when Exim fails to connect to the socket for saslauthd authentication.
4432 This could cause Exim to crash, or give a corrupted message.
4434 39. Added isip, isip4, and isip6 to ${if conditions.
4436 40. The ACL variables $acl_xx are now saved with the message, and can be
4437 accessed later in routers, transports, and filters.
4439 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4440 strings in the file are not string-expanded.
4442 42. If a MAIL command specified a SIZE value that was too large to fit into an
4443 int variable, the check against message_size_limit failed. Such values are
4444 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4445 day this will have to be increased, but I don't think I want to be around
4446 when emails are that large.
4453 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4454 iconv() is not standard in FreeBSD.
4456 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4457 IPv6 enabled. The observed symptom was a segmentation fault on return from
4458 the function os_common_find_running_interfaces() in src/os.c.
4460 3. In the check_special_case() function in daemon.c I had used "errno" as an
4461 argument name, which causes warnings on some systems. This was basically a
4462 typo, since it was named "eno" in the comments!
4464 4. The code that waits for the clock to tick (at a resolution of some fraction
4465 of a second) so as to ensure message-id uniqueness was always waiting for
4466 at least one whole tick, when it could have waited for less. [This is
4467 almost certainly not relevant at current processor speeds, where it is
4468 unlikely to ever wait at all. But we try to future-proof.]
4470 5. The function that sleeps for a time interval that includes fractions of a
4471 second contained a race. It did not block SIGALRM between setting the
4472 timer, and suspending (a couple of lines later). If the interval was short
4473 and the sigsuspend() was delayed until after it had expired, the suspension
4474 never ended. On busy systems this could lead to processes getting stuck for
4477 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4478 process, before it forks any delivery processes. The open lookup caching
4479 mechanism meant that the open file or database connection was passed into
4480 the delivery process. The problem was that delivery processes always tidy
4481 up cached lookup data. This could cause a problem for the next delivery
4482 process started by the queue runner, because the external queue runner
4483 process does not know about the closure. So the next delivery process
4484 still has data in the lookup cache. In the case of a file lookup, there was
4485 no problem because closing a file descriptor in a subprocess doesn't affect
4486 the parent. However, if the lookup was caching a connection to a database,
4487 the connection was closed, and the second delivery process was likely to
4488 see errors such as "PGSQL: query failed: server closed the connection
4489 unexpectedly". The problem has been fixed by closing all cached lookups
4490 in a queue runner before running a delivery process.
4492 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4493 seem to have the "const" qualifier which it has on other OS. I've
4496 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4497 *of the same type* (client or server) with the same public name that an
4498 error should be diagnosed.
4500 9. When Exim looked up a host name for an IP address, but failed to find the
4501 original IP address when looking up the host name (a safety check), it
4502 output the message "<ip address> does not match any IP for NULL", which was
4503 confusing, to say the least. The bug was that the host name should have
4504 appeared instead of "NULL".
4506 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4507 user that is built into the binary, and the -C or -D options is used, root
4508 privilege is dropped before the configuration file is read. In addition,
4509 logging is switched to stderr instead of the normal log files. If the
4510 configuration then re-defines the Exim user, the unprivileged environment
4511 is probably not what is expected, so Exim logs a panic warning message (but
4514 However, if deliver_drop_privilege is set, the unprivileged state may well
4515 be exactly what is intended, so the warning has been cut out in that case,
4516 and Exim is allowed to try to write to its normal log files.
4522 1. smtp_return_error_details was not giving details for temporary sender
4523 or receiver verification errors.
4525 2. Diagnose a configuration error if two authenticators have the same public
4528 3. Exim used not to create the message log file for a message until the first
4529 delivery attempt. This could be confusing when incoming messages were held
4530 for policy or load reasons. The message log file is now created at the time
4531 the message is received, and an initial "Received" line is written to it.
4533 4. The automatically generated man page for command line options had a minor
4534 bug that caused no ill effects; however, a more serious problem was that
4535 the procedure for building the man page automatically didn't always
4536 operate. Consequently, release 4.20 contains an out-of-date version. This
4537 shouldn't happen again.
4539 5. When building Exim with embedded Perl support, the script that builds the
4540 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4541 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4543 6. The freeze_tell option was not being used for messages that were frozen on
4544 arrival, either by an ACL or by local_scan().
4546 7. Added the smtp_incomplete_transaction log selector.
4548 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4549 was accepting AUTH without a new EHLO.
4551 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4552 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4555 10. Logging of TCP/IP connections (when configured) now happens in the main
4556 daemon process instead of the child process, so that the TCP/IP connection
4557 count is more accurate (but it can never be perfect).
4559 11. The use of "drop" in a nested ACL was not being handled correctly in the
4560 outer ACL. Now, if condition failure induced by the nested "drop" causes
4561 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4562 or "require"), the connection is dropped.
4564 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4565 that yield "discard" can now be used with an "accept" or a "discard" verb,
4566 but an error is generated for any others (because I can't see a useful way
4567 to define what should happen).
4569 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4570 are now processed in the same way as lines in the Exim configuration file.
4571 In particular, continuation lines are supported.
4573 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4575 15. Added -ti meaning -t -i.
4577 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4578 domains, and warn by logging if others are found.
4580 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4581 returned from GIFCONF when Exim is trying to find the list of interfaces on
4582 a host. The code in os.c has been modified to copy each ifreq to an aligned
4583 structure in all cases.
4585 Also, in some cases, the returned ifreq's were being copied to a 'struct
4586 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4587 means the last couple of bytes of an IPv6 address could be chopped if the
4588 ifreq contained only a normal sockaddr (14 bytes storage).
4590 18. Named domain lists were not supported in the hosts_treat_as_local option.
4591 An entry such as +xxxx was not recognized, and was treated as a literal
4594 19. Ensure that header lines added by a DATA ACL are included in the reject log
4595 if the ACL subsequently rejects the message.
4597 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4598 MD5 (which is deprecated).
4600 21. When testing a filter file using -bf, Exim was writing a message when it
4601 took the sender from a "From " line in the message, but it was not doing so
4602 when it took $return_path from a Return-Path: header line. It now does.
4604 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4605 with a valid header line field name (a series of printing characters
4606 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4608 23. Changed "disc" in the source to "disk" to conform to the documentation and
4609 the book and for uniformity.
4611 24. Ignore Sendmail's -Ooption=value command line item.
4613 25. When execve() failed while trying to run a command in a pipe transport,
4614 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4615 could be confused with a return value of 69 from the command itself. This
4616 has been changed to 127, the value the shell returns if it is asked to run
4617 a non-existent command. The wording for the related log line suggests a
4618 non-existent command as the problem.
4620 26. If received_header_text expands to an empty string, do not add a Received:
4621 header line to the message. (Well, it adds a token one on the spool, but
4622 marks it "old" so that it doesn't get used or transmitted.)
4624 27. Installed eximstats 1.28 (addition of -nt option).
4626 28. There was no check for failure on the call to getsockname() in the daemon
4627 code. This can fail if there is a shortage of resources on the system, with
4628 ENOMEM, for example. A temporary error is now given on failure.
4630 29. Contrary to the C standard, it seems that in some environments, the
4631 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4632 program. Exim now does this explicitly; it affects the formatting of
4633 timestamps using strftime().
4635 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4636 complaints. I've now initialized all the variables, to avoid this.
4638 32. Header lines added by a system filter were not being "seen" during
4639 transport-time rewrites.
4641 33. The info_callback() function passed to OpenSSL is set up with type void
4642 (*)(SSL *, int, int), as described somewhere. However, when calling the
4643 function (actually a macro) that sets it up, the type void(*)() is
4644 expected. I've put in a cast to prevent warnings from picky compilers.
4646 34. If a DNS black list lookup found a CNAME record, but there were no A
4647 records associated with the domain it pointed at, Exim crashed.
4649 35. If a DNS black list lookup returned more than one A record, Exim ignored
4650 all but the first. It now scans all returned addresses if a particular IP
4651 value is being sought. In this situation, the contents of the
4652 $dnslist_value variable are a list of all the addresses, separated by a
4655 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4656 to accept a host name and all its aliases if the forward lookup for any of
4657 them yielded the IP address of the incoming connection. Now it accepts only
4658 those names whose forward lookup yields the correct IP address. Any other
4659 names are discarded. This closes a loophole whereby a rogue DNS
4660 administrator could create reverse DNS records to break through a
4661 wildcarded host restriction in an ACL.
4663 37. If a user filter or a system filter that ran in a subprocess used any of
4664 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4665 the wrong values were passed to the pipe command ($thisaddress had the
4666 value of $0, $0 had the value of $1, etc). This bug was introduced by
4667 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4669 38. Improved the line breaking for long SMTP error messages from ACLs.
4670 Previously, if there was no break point between 40 and 75 characters, Exim
4671 left the rest of the message alone. Two changes have been made: (a) I've
4672 reduced the minimum length to 35 characters; (b) if it can't find a break
4673 point between 35 and 75 characters, it looks ahead and uses the first one
4674 that it finds. This may give the occasional overlong line, but at least the
4675 remaining text gets split now.
4677 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4678 file descriptors might be low, and that setting 1000 would always raise it.
4679 It turns out that in some environments, the limit is already over 1000 and
4680 that lowering it causes trouble. So now Exim takes care not to decrease it.
4682 40. When delivering a message, the value of $return_path is set to $sender_
4683 address at the start of routing (routers may change the value). By an
4684 oversight, this default was not being set up when an address was tested by
4685 -bt or -bv, which affected the outcome if any router or filter referred to
4688 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4689 log only when "message" or "log_message" are set. However, if one of the
4690 conditions was an address verification, or a call to a nested ACL, the
4691 messages generated by the underlying test were being passed through. This
4692 no longer happens. The underlying message is available in $acl_verify_
4693 message for both "message" and "log_message" expansions, so it can be
4694 passed through if needed.
4696 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4697 new expansion $bh_ to give the encoded byte string without charset
4698 translation. Translation happens only if iconv() is available; HAVE_ICONV
4699 indicates this at build time. HEADERS_CHARSET gives the charset to
4700 translate to; headers_charset can change it in the configuration, and
4701 "headers charset" can change it in an individual filter file.
4703 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4704 that creates RFC 2047 encoded "words" labels them as that charset instead
4705 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4706 expansion operator; (ii) when Exim creates a From: line for a local
4707 message; (iii) when a header line is rewritten to include a "phrase" part.
4709 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4710 buggy, causing it to skip the first lines of messages whose message ID
4711 ended in 'D'. This would not have bitten before Exim release 4.14, because
4712 message IDs were unlikely to end in 'D' before then. The effect was to have
4713 incorrect size information for certain domains.
4715 45. #include "config.h" was missing at the start of the crypt16.c module. This
4716 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4719 46. If there was a timeout during a "random" callout check, Exim treated it as
4720 a failure of the random address, and carried on sending RSET and the real
4721 address. If the delay was just some slowness somewhere, the response to the
4722 original RCPT would be taken as a response to RSET and so on, causing
4723 mayhem of various kinds.
4725 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4726 when I implemented it. It didn't allow for the fact that some option values
4727 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4728 the right test for positive values.
4730 48. Domain names in DNS records are case-independent. Exim always looks them up
4731 in lower case. Some resolvers return domain names in exactly the case they
4732 appear in the zone file, that is, they may contain uppercase letters. Not
4733 all resolvers do this - some return always lower case. Exim was treating a
4734 change of case by a resolver as a change of domain, similar to a widening
4735 of a domain abbreviation. This triggered its re-routing code and so it was
4736 trying to route what was effectively the same domain again. This normally
4737 caused routing to fail (because the router wouldn't handle the domain
4738 twice). Now Exim checks for this case specially, and just changes the
4739 casing of the domain that it ultimately uses when it transmits the message
4742 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4745 50. If a filter generated a file delivery with a non-absolute name (possible if
4746 no home directory exists for the router), the forbid_file option was not
4749 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4750 the existing equality matching.
4752 52. Exim was using ints instead of ino_t variables in some places where it was
4753 dealing with inode numbers.
4755 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4756 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4757 called TMPDIR, and if it finds it is different, it changes its value.
4759 54. The smtp_printf() function is now made available to local_scan() so
4760 additional output lines can be written before returning. There is also an
4761 smtp_fflush() function to enable the detection of a dropped connection.
4762 The variables smtp_input and smtp_batched_input are exported to
4765 55. Changed the default runtime configuration: the message "Unknown user"
4766 has been removed from the ACL, and instead placed on the localuser router,
4767 using the cannot_route_message feature. This means that any verification
4768 failures that generate their own messages won't get overridden. Similarly,
4769 the "Unrouteable address" message that was in the ACL for unverifiable
4770 relay addresses has also been removed.
4772 56. Added hosts_avoid_esmtp to the smtp transport.
4774 57. The exicyclog script was not checking for the esoteric option
4775 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4776 will work only if exicyclog is run under the appropriate euid.
4778 58. Following a discussion on the list, the rules by which Exim recognises line
4779 endings on incoming messages have been changed. The -dropcr and drop_cr
4780 options are now no-ops, retained only for backwards compatibility. The
4781 following line terminators are recognized: LF CRLF CR. However, special
4782 processing applies to CR:
4784 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4785 nor a local message in the state where . is a terminator.
4787 (ii) If a bare CR is encountered in a header line, an extra space is added
4788 after the line terminator so as not to end the header. The reasoning
4789 behind this is that bare CRs in header lines are most likely either
4790 to be mistakes, or people trying to play silly games.
4792 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4793 was being incorrectly given as 18 bytes larger than it should have been.
4794 This is a VOB (very old bug).
4796 60. This may never have affected anything current, but just in case it has:
4797 When the local host is found other than at the start of a list of hosts,
4798 the local host, those with the same MX, and any that follow, are discarded.
4799 When the list in question was part of a longer list of hosts, the following
4800 hosts (not currently being processed) were also being discarded. This no
4801 longer happens. I'm not sure if this situation could ever has previously
4804 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4807 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4808 header. This is something that is recommended in a new Internet Draft, and
4809 is something that is documented as being done by Sendmail. There are two
4810 possible values. For messages generated by the autoreply transport, Exim
4813 Auto-Submitted: auto-replied
4815 whereas for all other generated messages (e.g. bounces) it adds
4817 Auto-Submitted: auto-generated
4819 63. The "personal" condition in filters now includes a test for the
4820 Auto-Submitted: header. If it contains the string "auto-" the message it
4821 not considered personal.
4823 64. Added rcpt_include_affixes as a generic transport option.
4825 65. Added queue_only_override (default true).
4827 66. Added the syslog_duplication option.
4829 67. If what should have been the first header line of a message consisted of
4830 a space followed by a colon, Exim was mis-interpreting it as a header line.
4831 It isn't of course - it is syntactically invalid and should therefore be
4832 treated as the start of the message body. The misbehaviour could have
4833 caused a number of strange effects, including loss of data in subsequent
4834 header lines, and spool format errors.
4836 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4837 client host had authenticated. This control can now be exercised by an ACL
4838 for more flexibility.
4840 69. By default, callouts do not happen when testing with -bh. There is now a
4841 variant, -bhc, which does actually run the callout code, including
4842 consulting and updating the callout cache.
4844 70. Added support for saslauthd authentication, courtesy of Alexander
4847 71. If statvfs() failed on the spool or log directories while checking their
4848 size for availability, Exim confusingly gave the error "space shortage".
4849 Furthermore, in debugging mode it crashed with a floating point exception.
4850 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4851 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4852 serious problem, Exim now writes to the main and panic logs when this
4853 happens, with details of the failure. It then refuses to accept the
4854 incoming message, giving the message "spool directory problem" or "log
4855 directory problem" with a 421 code for SMTP messages.
4857 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4858 0, 1, and 2 exist, because some OS complain for execs without them (see
4859 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4860 descriptors. However, the code omitted to check that the open succeeded,
4861 causing mysterious errors if for some reason the permissions on /dev/null
4862 got screwed. Now Exim writes a message to the main and panic logs, and
4863 bombs out if it can't open /dev/null.
4865 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4866 interact so that it is all more flexible. It is supposed to remain
4867 backwards compatible. Also added extra_local_interfaces.
4869 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4870 to bomb out with an assertion failure - to the client this appears as a
4871 connection drop. This problem occurs in the part of the code that was taken
4872 from the Samba project. Fortunately, the assertion is in a very simple
4873 function, so I have fixed this by reproducing the function inline in the
4874 one place where it is called, and arranging for authentication to fail
4875 instead of killing the process with assert().
4877 75. The SPA client code was not working when the server requested OEM rather
4878 than Unicode encoding.
4880 76. Added code to make require_files with a specific uid setting more usable in
4881 the case where statting the file as root fails - usually a non-root-mounted
4882 NFS file system. When this happens and the failure is EACCES, Exim now
4883 forks a subprocess and does the per-uid checking as the relevant uid.
4885 77. Added process_log_path.
4887 78. If log_file_path was not explicitly set, a setting of check_log_space or
4888 check_log_inodes was ignored.
4890 79. If a space check for the spool or log partitions fails, the incident is now
4891 logged. Of course, in the latter case the data may get lost...
4893 80. Added the %p formatting code to string_format() so that it can be used to
4894 print addresses in debug_print(). Adjusted all the address printing in the
4895 debugging in store.c to use %p rather than %d.
4897 81. There was a concern that a line of code in smtp_in.c could overflow a
4898 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4899 initially expressed, the concern was not well-founded, because trailing
4900 spaces are removed early. However, if the trailing spaces were followed by
4901 a NULL, they did not get removed, so the overflow was possible. Two fixes
4904 (a) I re-wrote the offending code in a cleaner fashion.
4905 (b) If an incoming SMTP command contains a NULL character, it is rejected
4908 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4909 runs initgroups(), so that if the Exim user is in any additional groups,
4910 they will be used during message reception.
4916 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob