1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.292 2006/02/13 11:13:37 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 The code for finding all the local interface addresses on a FreeBSD
10 system running IPv6 was broken. This may well have applied to all BSD
11 systems, as well as to others that have similar system calls. The broken
12 code found IPv4 interfaces correctly, but gave incorrect values for the
13 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
14 that it would not match correctly against @[] and not recognize the IPv6
17 PH/02 The ipliteral router was not recognizing addresses of the form user@
18 [ipv6:....] because it didn't know about the "ipv6:" prefix.
20 PH/03 Added disable_ipv6.
22 PH/04 Changed $reply_address to use the raw form of the headers instead of the
23 decoded form, because it is most often used to construct To: headers
24 lines in autoreplies, and the decoded form may well be syntactically
25 invalid. However, $reply_address has leading white space removed, and all
26 newlines turned into spaces so that the autoreply transport does not
29 PH/05 If group was specified without a user on a router, and no group or user
30 was specified on a transport, the group from the router was ignored.
32 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
33 for visible compile-time settings that can be used to change these
34 numbers, for those that want even more. Backwards compatibility with old
35 spool files has been maintained. However, going back to a previous Exim
36 release will lost any variables that are in spool files.
38 PH/07 Two small changes when running in the test harness: increase delay when
39 passing a TCP/IP connection to a new process, in case the original
40 process has to generate a bounce, and remove special handling of
41 127.0.0.2 (sic), which is no longer necessary.
43 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
44 be the same on different OS.
46 PH/09 Moved a debug statement in filter processing to avoid a race problem when
49 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
50 whether --show-vars was specified or not
52 JJ/02 exipick: Added support for new ACL variable spool format introduced
55 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
56 syntactically invalid From: or Reply-to: line, and a filter used this to
57 generate an autoreply, and therefore failed to obtain an address for the
58 autoreply, Exim could try to deliver to a non-existent relative file
59 name, causing unrelated and misleading errors. What now happens is that
60 it logs this as a hard delivery error, but does not attempt to create a
63 PH/11 The exinext utility has a -C option for testing purposes, but although
64 the given file was scanned by exinext itself; it wasn't being passed on
67 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
68 an end-of-file indication when reading a command response.
70 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
71 compiled. In many other places in Exim, IPv6 addresses are always
72 recognized, so I have changed this. It also means that IPv4 domain
73 literals of the form [IPV4:n.n.n.n] are now always recognized.
75 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
76 used if the router is not running as root, for example, when verifying at
77 ACL time, or when using -bh. The debugging output from this situation was
78 non-existent - all you got was a failure to exec. I have made two
81 (a) Failures to set uid/gid, the current directory, or a process leader
82 in a subprocess such as that created by queryprogram now generate
83 suitable debugging ouput when -d is set.
85 (b) The queryprogram router detects when it is not running as root,
86 outputs suitable debugging information if -d is set, and then runs
87 the subprocess without attempting to change uid/gid.
89 PH/15 Minor change to Makefile for building test_host (undocumented testing
92 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
93 additional section of a DNS packet that returns MX or SRV records.
94 Instead, it always explicitly searches for A/AAAA records. This avoids
95 major problems that occur when a DNS server includes only records of one
96 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
97 fixed another bug: if SRV records were looked up and the corresponding
98 address records were *not* found in the additional section, the port
99 values from the SRV records were lost.
101 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
102 using the correct key (the original address) when searching the retry
103 rules in order to find which one to use for generating the retry hint.
105 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
106 adding the default one. Similarly, if it contains a Reply-To: header, the
107 errors_reply_to option, if set, is not used.
109 PH/19 When calculating a retry time, Exim used to measure the "time since
110 failure" by looking at the "first failed" field in the retry record. Now
111 it does not use this if it is later than than the arrival time of the
112 message. Instead it uses the arrival time. This makes for better
113 behaviour in cases where some deliveries succeed, thus re-setting the
114 "first failed" field. An example is a quota failure for a huge message
115 when small messages continue to be delivered. Without this change, the
116 "time since failure" will always be short, possible causing more frequent
117 delivery attempts for the huge message than are intended.
119 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
120 $1, $2, $3) because the numerical variables can be reset during some
121 expansion items (e.g. "match"), thereby losing the authentication data.
123 PH/21 Make -bV show the size of off_t variables so that the test suite can
124 decide whether to run tests for quotas > 2G.
126 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
127 mailbox_size, and mailbox_filecount in the appendfile transport. If a
128 filecount value is greater than 2G or if a quota value is greater than 2G
129 on a system where the size of off_t is not greater than 4, a panic error
132 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
133 never match. The debug and -bh output now contains an explicit error
134 message indicating a malformed IPv4 address or mask.
136 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
137 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
145 PH/01 Two changes to the default runtime configuration:
147 (1) Move the checks for relay_from_hosts and authenticated clients from
148 after to before the (commented out) DNS black list checks.
150 (2) Add control=submission to the relay_from_hosts and authenticated
151 clients checks, on the grounds that messages accepted by these
152 statements are most likely to be submissions.
154 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
156 (1) Generate an error if the third argument for the ${prvs expansion is
159 (2) Treat a missing third argument of ${prvscheck as if it were an empty
162 (3) Reset the variables that are obtained from the first argument of
163 ${prvscheck and used in the second argument before leaving the code,
164 because their memory is reclaimed, so using them afterwards may do
167 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
168 one (it's much easier than Tom thought :-).
170 (5) Because of (4), we can now allow for the use of $prvscheck_result
171 inside the third argument.
173 PH/03 For some reason, the default setting of PATH when running a command from
174 a pipe transport was just "/usr/bin". I have changed it to
177 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
178 anything to be listed in the output from -bV.
180 PH/05 When a filter generated an autoreply, the entire To: header line was
181 quoted in the delivery log line, like this:
183 => >A.N.Other <ano@some.domain> <original@ddress> ...
185 This has been changed so that it extracts the operative address. There
186 may be more than one such address. If so, they are comma-separated, like
189 => >ano@some.domain,ona@other.domain <original@ddress> ...
191 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
192 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
193 not being looked up in the rDNS to get a host name, Exim was showing the
194 IP address twice in Received: lines, even though the IP addresses were
195 identical. For example:
197 Received: from [1.2.3.4] (helo=[1.2.3.4])
199 However, if the real host name was known, it was omitting the HELO data
200 if it matched the actual IP address. This has been tidied up so that it
201 doesn't show the same IP address twice.
203 PH/07 When both +timestamp and +memory debugging was on, the value given by
204 $tod_xxx expansions could be wrong, because the tod_stamp() function was
205 called by the debug printing, thereby overwriting the timestamp buffer.
206 Debugging no longer uses the tod_stamp() function when +timestamp is set.
208 PH/08 When the original message was included in an autoreply transport, it
209 always said "this is a copy of the message, including all the headers",
210 even if body_only or headers_only was set. It now gives an appropriate
213 PH/09 Applied a patch from the Sieve maintainer which:
215 o fixes some comments
216 o adds the (disabled) notify extension core
217 o adds some debug output for the result of if/elsif tests
218 o points to the current vacation draft in the documentation
219 and documents the missing references header update
223 o fixes a bug in processing the envelope test (when testing
224 multiple envelope elements, the last element determinted the
227 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
228 Electronic Mail") by including:
230 Auto-submitted: auto-generated
232 in the messages that it generates (bounce messages and others, such as
233 warnings). In the case of bounce messages for non-SMTP mesages, there was
234 also a typo: it was using "Auto_submitted" (underscore instead of
235 hyphen). Since every message generated by Exim is necessarily in response
236 to another message, thes have all been changed to:
238 Auto-Submitted: auto-replied
240 in accordance with these statements in the RFC:
242 The auto-replied keyword:
244 - SHOULD be used on messages sent in direct response to another
245 message by an automatic process,
247 - MUST NOT be used on manually-generated messages,
249 - MAY be used on Delivery Status Notifications (DSNs) and Message
250 Disposition Notifications (MDNs),
252 - MUST NOT be used on messages generated by automatic or periodic
253 processes, except for messages which are automatic responses to
256 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
257 to the default Received: header definition.
259 PH/12 Added log selector acl_warn_skipped (default on).
261 PH/13 After a successful wildlsearch lookup, discard the values of numeric
262 variables because (a) they are in the wrong storage pool and (b) even if
263 they were copied, it wouldn't work properly because of the caching.
265 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
266 checking when decoding. Apparently there are clients that generate
267 overlong encoded strings. Why am I not surprised?
269 PH/15 If the first argument of "${if match_address" was not empty, but did not
270 contain an "@" character, Exim crashed. Now it writes a panic log message
271 and treats the condition as false.
273 PH/16 In autoreply, treat an empty string for "once" the same as unset.
275 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
276 extension "envelope-auth". The code is finished and in agreement with
277 other implementations, but there is no documentation so far and in fact,
278 nobody wrote the draft yet. This extension is currently #undef'ed, thus
279 not changing the active code.
281 Print executed "if" and "elsif" statements when debugging is used. This
282 helps a great deal to understand what a filter does.
284 Document more things not specified clearly in RFC3028. I had all this
285 sorted out, when out of a sudden new issues came to my mind. Oops."
287 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
290 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
291 canonical form (as documented). However, after a host name lookup from
292 the IP address, check_host() was doing a simple string comparison with
293 addresses acquired from the DNS when checking that the found name did
294 have the original IP as one of its addresses. Since any found IPv6
295 addresses are likely to be in abbreviated form, the comparison could
296 fail. Luckily, there already exists a function for doing the comparison
297 by converting both addresses to binary, so now that is used instead of
300 PH/20 There was another similar case to PH/19, when a complete host name was
301 given in a host list; looking up its IP address could give an abbreviated
302 form, whereas the current host's name might or might not be abbreviated.
303 The same fix has been applied.
309 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
310 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
313 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
314 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
316 PH/03 Typo: missing ".o" in src/pcre/Makefile.
318 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
319 header line, restrict the check to what is listed in RFCs 2369 and 2929.
320 Also, for "Auto-Submitted", treat anything other than "no" as
321 non-personal, in accordance with RFC 3834. (Previously it treated
322 anything starting "auto-" as non-personal.)
324 TF/01 The control=submission/name=... option had a problem with syntax
325 errors if the name included a slash character. The /name= option
326 now slurps the rest of the string, so it can include any characters
327 but it must come last in the list of options (after /sender_retain
330 PH/05 Some modifications to the interface to the fake nameserver for the new
338 TK/01 Added the "success_on_redirect" address verification option. See
339 NewStuff for rationale and an example.
341 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
343 PH/02 Patch to exigrep to allow it to work on syslog lines.
345 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
346 fread() to skip over the body file's header line, because in Cygwin the
347 header line is locked and is inaccessible.
349 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
350 co-exist for some time) to make it clear that it is the Exim ID that is
351 referenced, not the Message-ID: header line.
353 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
354 string_format() function, because snprintf() does not exist on all
357 PH/06 The use of forbid_filter_existstest now also locks out the use of the
358 ${stat: expansion item.
360 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
361 protocol synchronization error", to keep the pedants happy.
363 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
364 well as for IRIX systems, when gcc is being used. See the host.c source
367 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
369 PH/10 Named domain lists were not working if used in a queue_smtp_domains
372 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
373 transport and to the smtp transport in LMTP mode.
375 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
377 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
378 run a filter in a subprocess. This could lead to confusion in subsequent
379 lookups in the parent process. There should also be a search_tidyup() at
380 the end of the subprocess.
382 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
383 only if the host matched helo_try_verify_hosts, which caused the
384 verification to occur when the EHLO/HELO command was issued. The ACL just
385 tested the remembered result. Now, if a previous verification attempt has
386 not happened, "verify = helo" does it there and then.
388 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
390 TK/03 Fix log output including CR from clamd.
392 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
393 exist provoked a memory error which could cause a segfault.
395 PH/15 Installed PCRE 6.2
397 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
399 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
400 of the problem. Specifically, suggested +O2 rather than +O1 for the
403 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
405 PH/20 If a delivery was routed to a non-standard port by means of an SRV
406 record, the port was not correctly logged when the outgoing_port log
407 selector was set (it logged the transort's default port).
409 PH/21 Added support for host-specific ports to manualroute, queryprogram,
410 fallback_hosts, and "hosts" in the smtp transport.
412 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
413 host errors such as "Connection refused".
415 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
416 authentication with radiusclient 0.4.9:
418 - Error returned from rc_read_config was caught wrongly
419 - Username/password not passed on to radius server due to wrong length.
421 The presumption is that some radiusclient API changes for 4.51/PH/17
422 were not taken care of correctly. The code is still untested by me (my
423 Linux distribution still has 0.3.2 of radiusclient), but it was
424 contributed by a Radius user.
426 PH/24 When doing a callout, the value of $domain wasn't set correctly when
427 expanding the "port" option of the smtp transport.
429 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
430 while reading a MIME header. Thanks to Tom Hughes for a patch.
432 PH/24 Include config.h inside local_scan.h so that configuration settings are
435 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
436 that in an ACL for RCPT (for example), you can examine exactly what was
439 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
440 commands, but it was not correctly comparing the address with the actual
441 client host address. Thus, it would show the EHLO address in Received:
442 header lines when this was not necessary.
444 PH/27 Added the % operator to ${eval:}.
446 PH/28 Exim tries to create and chdir to its spool directory when it starts;
447 it should be ignoring failures (because with -C, for example, it has lost
448 privilege). It wasn't ignoring creation failures other than "already
451 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
454 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
455 because an input line was too long, either on its own, or by virtue of
456 too many continuations, the temporary file was not being removed, and the
457 return code was incorrect.
459 PH/31 Missing "BOOL" in function definition in filtertest.c.
461 PH/32 Applied Sieve patches from the maintainer.
463 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
465 PH/33 Added "verify = not_blind".
467 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
468 Local/Makefile (with some defaults set). These are used in built scripts
469 such as exicyclog, but they have never been used in the exim_install
470 script (though there are many overriding facilities there). I have
471 arranged that the exim_install script now takes note of these two
474 PH/35 Installed configuration files for Dragonfly.
476 PH/36 When a locally submitted message by a trusted user did not contain a
477 From: header, and the sender address was obtained from -f or from an SMTP
478 MAIL command, and the trusted user did not use -F to supply a sender
479 name, $originator_name was incorrectly used when constructing a From:
480 header. Furthermore, $originator_name was used for submission mode
481 messages from external hosts without From: headers in a similar way,
482 which is clearly wrong.
484 PH/37 Added control=suppress_local_fixups.
486 PH/38 When log_selector = +received_sender was set, and the addition of the
487 sender made the log line's construction buffer exactly full, or one byte
488 less than full, an overflow happened when the terminating "\n" was
491 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
492 when the result of a list match is failure because a DNS lookup failed.
494 PH/40 RM_COMMAND is now used in the building process.
496 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
497 the "build-* directories that it finds.
499 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
500 address in a domain literal was a prefix of an interface address.
502 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
503 when verifying a sender address, unless rewrite_headers is false.
505 PH/44 Wrote a long comment about why errors_to addresses are verified as
506 recipients, not senders.
508 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
509 the ratelimit ACL was added.
511 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
513 PH/46 Added extra information about PostgreSQL errors to the error string.
515 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
516 avoiding the need to install special zones in a real server. This is
517 backwards compatible; if it can't find the fake resolver, it drops back.
518 Thus, both old and new test suites can be run.
520 TF/02 Added util/ratelimit.pl
522 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
523 clock is set back in time.
525 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
526 Candler <B.Candler@pobox.com>.
528 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
529 OK for addresses that are the result of redirections.
531 PH/48 A number of further additions for the benefit of the new test suite,
532 including a fake gethostbyname() that interfaces to the fake DNS resolver
535 TF/06 The fix for widen_domains has also been applied to qualify_single and
536 search_parents which are the other dnslookup options that can cause
539 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
542 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
544 TF/07 Exim produced the error message "an SRV record indicated no SMTP
545 service" if it encountered an MX record with an empty target hostname.
546 The message is now "an MX or SRV record indicated no SMTP service".
548 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
549 if the DNS of the sending site is misconfigured. This is quite a
550 common situation. This change restores the behaviour of treating a
551 helo verification defer as a failure.
553 PH/51 If self=fail was set on a router, the bounce message did not include the
554 actual error message.
560 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
562 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
563 command itself ended in error, the underlying message about the transport
564 filter timeout was being overwritten with the pipe command error. Now the
565 underlying error message should be appended to the second error message.
567 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
569 PH/02 Reduce the amount of output that "make" produces by default. Full output
570 can still be requested.
572 PH/03 The warning log line about a condition test deferring for a "warn" verb
573 was being output only once per connection, rather than after each
574 occurrence (because it was using the same function as for successful
575 "warn" verbs). This seems wrong, so I have changed it.
577 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
578 it should not have, which might have caused a crash in the right
579 circumstances, but probably never did.
581 PH/04 Installed a modified version of Tony Finch's patch to make submission
582 mode fix the return path as well as the Sender: header line, and to
583 add a /name= option so that you can make the user's friendly name appear
586 TF/03 Added the control = fakedefer ACL modifier.
588 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
589 Mark Lowes for thorough testing.
591 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
593 TK/03 Merged latest SRS patch from Miles Wilton.
595 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
596 with the definition in sysexits.h (which is #included earlier).
597 Fortunately, Exim does not actually use EX_OK. The code used to try to
598 preserve the sysexits.h value, by assumimg that macro definitions were
599 scanned for macro replacements. I have been disabused of this notion,
600 so now the code just undefines EX_OK before #including unistd.h.
602 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
603 in the smtp transport. When a block could not be written in a single
604 write() function, the timeout was being re-applied to each part-write.
605 This seems wrong - if the receiver was accepting one byte at a time it
606 would take for ever. The timeout is now adjusted when this happens. It
607 doesn't have to be particularly precise.
609 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
610 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
612 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
613 without a domain if the check to <postmaster@domain> fails.
615 SC/01 Eximstats: added -xls and the ability to specify output files
616 (patch written by Frank Heydlauf).
618 SC/02 Eximstats: use FileHandles for outputing results.
620 SC/03 Eximstats: allow any combination of xls, txt, and html output.
622 SC/04 Eximstats: fixed display of large numbers with -nvr option
624 SC/05 Eximstats: fixed merging of reports with empty tables.
626 SC/06 Eximstats: added the -include_original_destination flag
628 SC/07 Eximstats: removed tabs and trailing whitespace.
630 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
632 TK/06 MBOX spool code: Add real "From " MBOX separator line
633 so the .eml file is really in mbox format (even though
634 most programs do not really care). Patch from Alex Miller.
636 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
637 The latter is generated from $received_to and is only set if the
638 message has one envelope recipient. SA can use these headers,
639 obviously out-of-the-box. Patch from Alex Miller.
641 PH/08 The ${def test on a variable was returning false if the variable's
642 value was "0", contrary to what the specification has always said!
643 The result should be true unless the variable is empty.
645 PH/09 The syntax error of a character other than { following "${if
646 def:variable_name" (after optional whitespace) was not being diagnosed.
647 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
648 accidental colon was present, for example, could give incorrect results.
650 PH/10 Tidied the code in a number of places where the st_size field of a stat()
651 result is used (not including appendfile, where other changes are about
654 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
655 This involved changing a lot of size variables from int to off_t. It
656 should work with maildirs and everything.
658 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
659 spamd dying while we are connected to it.
661 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
664 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
665 function for BDB 4.3.
667 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
669 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
670 the sources for PCRE have been re-arranged and more files are now
673 PH/15 The code I had for printing potentially long long variables in PH/11
674 above was not the best (it lost precision). The length of off_t variables
675 is now inspected at build time, and an appropriate printing format (%ld
676 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
677 to be "long long int" or "long int". This is needed for the internal
678 formatting function string_vformat().
680 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
681 the configuration file to be ":syslog", then the script "guesses" where
682 the logs files are, rather than using the compiled in default. In our
683 case the guess is not the same as the compiled default, so the script
684 suddenly stopped working when I started to use syslog. The patch checks
685 to see if log_file_path is "". If so, it attempts to read it from exim
686 with no configuration file to get the compiled in version, before it
687 falls back to the previous guessing code."
689 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
690 implementing BATV in an Exim configuration. See NewStuff for the gory
693 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
694 Makefile that are specific to HP-UX.
696 PH/18 If the "use_postmaster" option was set for a recipient callout together
697 with the "random" option, the postmaster address was used as the MAIL
698 FROM address for the random test, but not for the subsequent recipient
699 test. It is now used for both.
701 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
702 patch removes a few documentation additions to RFC 3028, because the
703 latest draft now contains them. It adds the new en;ascii-case comparator
704 and a new error check for 8bit text in MIME parts. Comparator and
705 require names are now matched exactly. I enabled the subaddress
706 extension, but it is not well tested yet (read: it works for me)."
708 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
709 rework some of the code of TK/09 above to avoid the hardwired use of
710 "%lld" and "long long". Replaced the call to snprintf() with a call to
713 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
714 records point to non-existent hosts", "retry timeout exceeded", and
715 "retry time not reached for any host after a long failure period".
717 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
718 experimental DomainKeys support:
720 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
721 (2) On an error such as an illegally used "control", the wrong name for
722 the control was given.
724 These problems did NOT occur unless DomainKeys support was compiled.
726 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
728 PH/24 Added ${if match_ip condition.
730 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
731 databases so that it will be absolutely obvious if a crash occurs in the
732 DB library. This is a regular occurrence (often caused by mis-matched
735 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
736 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
737 picked up on a user's system that detects such things. There doesn't seem
738 to be a gcc warning option for this - only an attribute that has to be
739 put on the function's prototype. It seems that in Fedora Core 4 they have
740 set this on a number of new functions. No doubt there will be more in due
743 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
744 specify a transport. However, if an address that was verified by such a
745 router was the subject of a callout, Exim crashed because it tried to
746 read the rcpt_include_affixes from the non-existent transport. Now it
747 just assumes that the setting of that option is false. This bug was
748 introduced by 4.51/PH/31.
750 PH/28 Changed -d+all to exclude +memory, because that information is very
751 rarely of interest, but it makes the output a lot bigger. People tend to
752 do -d+all out of habit.
754 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
755 code in os-type was giving problems when libc.so lives in lib64, like on
758 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
759 aren't the modern standard, and it seems that some systems' include files
760 don't always have them. Exim was already checking for some of the newer
761 ones like T_AAAA, and defining it itself. I've added checks for all the
762 record types that Exim uses.
764 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
765 not automatically generating a new one, as it is supposed to. This
766 prevented TLS from working. If the file did exist, but contained invalid
767 data, a new version was generated, as expected. It was only the case of a
768 non-existent file that was broken.
770 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
771 with a change in libdomainkeys > 0.64.
773 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
774 from DNS. If the selector record carries the flag, it now has
775 precedence over the domain-wide flag.
777 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
779 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
780 the use of a port name that isn't defined in /etc/services) occurred, the
781 message was deferred as in a normal delivery, and thus remained on the
782 spool, instead of being failed because of the mua_wrapper setting. This
783 is now fixed, and I tidied up some of the mua_wrapper messages at the
786 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
787 the messages in a hash of arrays rather than using individual hashes.
788 This is a bit cleaner and results in dramatic memory savings, albeit
789 at a slight CPU cost.
791 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
792 as requested by Marc Sherman.
794 SC/10 Eximstats: added histograms for user specified patterns as requested
797 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
799 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
800 fopen() in the content-scanning modules that did not already have it.
806 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
807 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
809 TK/02 Fix ACL "control" statement not being available in MIME ACL.
811 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
813 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
814 to test Sieve filters that use "vacation".
816 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
817 that changes the way the GnuTLS parameters are stored in the cache file.
818 The new format can be generated externally. For backward compatibility,
819 if the data in the cache doesn't make sense, Exim assumes it has read an
820 old-format file, and it generates new data and writes a new file. This
821 means that you can't go back to an older release without removing the
824 PH/03 A redirect router that has both "unseen" and "one_time" set does not
825 work if there are any delivery delays because "one_time" forces the
826 parent to be marked "delivered", so its unseen clone is never tried
827 again. For this reason, Exim now forbids the simultaneous setting of
830 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
831 redirected to themselves ("homonym" addresses). Read the long ChangeLog
832 entry if you want to know the details. The fix, however, neglected to
833 consider the case when local delivery batching is involved. The test for
834 "previously delivered" was not happening when checking to see if an
835 address could be batched with a previous (undelivered) one; under
836 certain circumstances this could lead to multiple deliveries to the same
839 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
840 in its include files, and this causes problems building Exim.
842 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
843 header_syntax) but Exim was just ignoring anything given after a slash.
844 In particular, this caused confusion with an attempt to use "verify =
845 reverse_host_lookup/defer_ok". An error is now given when options are
846 supplied for verify items that do not have them. (Maybe reverse_host_
847 lookup should have a defer_ok option, but that's a different point.)
849 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
850 defined by RFC 821) to 2048, because there were problems with some AUTH
851 commands, and RFC 1869 says the size should be increased for extended
852 SMTP commands that take arguments.
854 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
857 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
858 "unknown" error; now it says that the functionality isn't in the binary.
860 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
861 an address' error message when a string expansion fails (syntax or
862 whatever). Otherwise the password may appear in the log. Following change
863 PH/42 below, there is no longer a chance of it appearing in a bounce
866 PH/11 Installed exipick version 20050225.0 from John Jetmore.
868 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
869 of its addresses was ever tried. (Bugzilla bug #2.)
871 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
872 the result incorrectly in the debug output. (It correctly added a newline
873 to what was transported.)
875 TF/01 Added $received_time.
877 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
878 commented out examples of how to interface to a virus scanner and to
879 SpamAssassin. Also added commented examples of av_scanner and
880 spamd_address settings.
882 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
883 and controls are allowed in which ACLs. There were a couple of minor
884 errors. Some of the entries in the conditions table (which is a table of
885 where they are NOT allowed) were getting very unwieldy; rewrote them as a
886 negation of where the condition IS allowed.
888 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
890 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
891 header file does not have a version number, so I've had to invent a new
892 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
893 API. The code is untested by me (my Linux distribution still has 0.3.2 of
894 radiusclient), but it was contributed by a Radius user.
896 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
897 files or directories, for OpenSSL.
899 PH/19 When an Exim process that is running as root has to create an Exim log
900 file, it does so in a subprocess that runs as exim:exim so as to get the
901 ownership right at creation (otherwise, other Exim processes might see
902 the file with the wrong ownership). There was no test for failure of this
903 fork() call, which would lead to the process getting stuck as it waited
904 for a non-existent subprocess. Forks do occasionally fail when resources
905 run out. I reviewed all the other calls to fork(); they all seem to check
908 PH/20 When checking for unexpected SMTP input at connect time (before writing
909 the banner), Exim was not dealing correctly with a non-positive return
910 from the read() function. If the client had disconnected by this time,
911 the result was a log entry for a synchronization error with an empty
912 string after "input=" when read() returned zero. If read() returned -1
913 (an event I could not check), uninitialized data bytes were printed.
914 There were reports of junk text (parts of files, etc) appearing after
917 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
919 PH/22 Added support for macro redefinition, and (re)definition in between
920 driver and ACL definitions.
922 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
923 forgetting to use the resulting value; it was using the unexpanded value.
925 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
926 hadn't been configured. The fix is from Juergen Kreileder, who
927 understands it better than I do:
929 "Here's what I see happening with three configured cyrus_sasl
930 authenticators configured (plain, login, cram-md5):
932 On startup auth_cyrus_sasl_init() gets called for each of these.
933 This means three calls to sasl_listmech() without a specified mech_list.
934 => SASL tests which mechs of all available mechs actually work
935 => three warnings about OTP not working
936 => the returned list contains: plain, login, cram-md5, digest-md5, ...
938 With the patch, sasl_listmech() also gets called three times. But now
939 SASL's mech_list option is set to the server_mech specified in the the
940 authenticator. Or in other words, the answer from sasl_listmech()
941 gets limited to just the mech you're testing for (which is different
943 => the return list contains just 'plain' or 'login', 'cram-md5' or
944 nothing depending on the value of ob->server_mech.
946 I've just tested the patch: Authentication still works fine,
947 unavailable mechs specified in the exim configuration are still
948 caught, and the auth.log warnings about OTP are gone."
950 PH/25 When debugging is enabled, the contents of the command line are added
951 to the debugging output, even when log_selector=+arguments is not
954 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
955 answer is "GNU", and only if the return is "GNU/something" is the answer
958 PH/27 $acl_verify_message is now set immediately after the failure of a
959 verification in an ACL, and so is available in subsequent modifiers. In
960 particular, the message can be preserved by coding like this:
962 warn !verify = sender
963 set acl_m0 = $acl_verify_message
965 Previously, $acl_verify_message was set only while expanding "message"
966 and "log_message" when a very denied access.
968 PH/28 Modified OS/os.c-Linux with
970 -#ifndef OS_LOAD_AVERAGE
971 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
973 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
974 nomenclature these days.)
976 PH/29 Installed patch from the Sieve maintainer that adds the options
977 sieve_useraddress and sieve_subaddress to the redirect router.
979 PH/30 In these circumstances:
980 . Two addresses routed to the same list of hosts;
981 . First host does not offer TLS;
982 . First host accepts first address;
983 . First host gives temporary error to second address;
984 . Second host offers TLS and a TLS session is established;
985 . Second host accepts second address.
986 Exim incorrectly logged both deliveries with the TLS parameters (cipher
987 and peerdn, if requested) that were in fact used only for the second
990 PH/31 When doing a callout as part of verifying an address, Exim was not paying
991 attention to any local part prefix or suffix that was matched by the
992 router that accepted the address. It now behaves in the same way as it
993 does for delivery: the affixes are removed from the local part unless
994 rcpt_include_affixes is set on the transport.
996 PH/32 Add the sender address, as F=<...>, to the log line when logging a
997 timeout during the DATA phase of an incoming message.
999 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1000 applied a patch sanctioned by the Sieve maintainer.
1002 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1003 the uid or gid is negative. A case of a negative gid caused this to be
1004 noticed. The fix allows for either to be negative.
1006 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1007 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1010 PH/36 The change PH/12 above was broken. Fixed it.
1012 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1013 the grounds that routing the same address twice would always produce the
1014 same answer. This might have been true once, but it is certainly no
1015 longer true now. Routing a child address may depend on the previous
1016 routing that produced that child. Some complicated redirection strategies
1017 went wrong when messages had multiple recipients, and made Exim's
1018 behaviour dependent on the order in which the addresses were given.
1020 I have moved the duplicate checking until after the routing is complete.
1021 Exim scans the addresses that are assigned to local and remote
1022 transports, and removes any duplicates. This means that more work will be
1023 done, as duplicates will always all be routed, but duplicates are
1024 presumably rare, so I don't expect this is of any significance.
1026 For deliveries to pipes, files, and autoreplies, the duplicate checking
1027 still happens during the routing process, since they are not going to be
1030 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1031 It corrects a timeout issue with spamd. This is Ian's comment: "The
1032 background is that sometimes spamd either never reads data from a
1033 connection it has accepted, or it never writes response data. The exiscan
1034 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1035 blindly assumes that writes won't block so it may never time out."
1037 PH/39 Allow G after quota size as well as K and M.
1039 PH/40 The value set for $authenticated_id in an authenticator may not contain
1040 binary zeroes or newlines because the value is written to log lines and
1041 to spool files. There was no check on this. Now the value is run through
1042 the string_printing() function so that such characters are converted to
1043 printable escape sequences.
1045 PH/41 $message_linecount is a new variable that contains the total number of
1046 lines in the message. Compare $body_linecount, which is the count for the
1049 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1050 bounce and delay warning messages, except in certain special cases, which
1053 (a) An SMTP error message from a remote host;
1054 (b) A message specified in a :fail: redirection;
1055 (c) A message specified in a "fail" command in a system filter;
1056 (d) A message specified in a FAIL return from the queryprogram router;
1057 (e) A message specified by the cannot_route_message router option.
1059 In these cases only, Exim does include the error details in bounce and
1060 warning messages. There are also a few cases where bland messages such
1061 as "unrouteable address" or "local delivery error" are given.
1063 PH/43 $value is now also set for the "else" part of a ${run expansion.
1065 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1066 being worked on, but at least Exim now implements the latest version to
1069 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1070 process to complete was treated as a delivery failure, a timeout while
1071 writing the message to the pipe was logged, but erroneously treated as a
1072 successful delivery. Such timeouts include transport filter timeouts. For
1073 consistency with the overall process timeout, these timeouts are now
1074 treated as errors, giving rise to delivery failures by default. However,
1075 there is now a new Boolean option for the pipe transport called
1076 timeout_defer, which, if set TRUE, converts the failures into defers for
1077 both kinds of timeout. A transport filter timeout is now identified in
1080 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1081 systems where "make" and "gmake" are different, calling "gmake" at top
1082 level broke things. I've arranged for the value of $(MAKE) to be passed
1083 from the Makefile to this script so that it can call the same version of
1087 A note about Exim versions 4.44 and 4.50
1088 ----------------------------------------
1090 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1091 changes of various kinds. As a consequence, a big documentation update was
1092 needed. This delayed the release for rather longer than seemed good, especially
1093 in the light of a couple of (minor) security issues. Therefore, the changes
1094 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1095 release. So 4.44 and 4.50 are in effect two different branches that both start
1098 I have left the 4.50 change log unchanged; it contains all the changes since
1099 4.43. The change log for 4.44 is below; many of its items are identical to
1100 those for 4.50. This seems to be the most sensible way to preserve the
1101 historical information.
1107 1. Minor wording change to the doc/README.SIEVE file.
1109 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1110 computation of the current number of files was incorrect.
1112 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1113 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1116 4. Give more explanation in the error message when the command for a transport
1117 filter fails to execute.
1119 5. There are several places where Exim runs a non-Exim command in a
1120 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1121 was being done only for the command run by the queryprogram router. It is
1122 now done for all such subprocesses. The other cases are: ${run, transport
1123 filters, and the commands run by the lmtp and pipe transports.
1125 6. Added CONFIGURE_GROUP build-time option.
1127 7. Some older OS have a limit of 256 on the maximum number of file
1128 descriptors. Exim was using setrlimit() to set 1000 as a large value
1129 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1130 systems. I've change it so that if it can't get 1000, it tries for 256.
1132 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1133 was an oversight, and furthermore, ever since the addition of extra
1134 controls (e.g. 4.43/32), the checks on when to allow different forms of
1135 "control" were broken. There should now be diagnostics for all cases when a
1136 control that does not make sense is encountered.
1138 9. Added the /retain_sender option to "control=submission".
1140 10. $recipients is now available in the predata ACL (oversight).
1142 11. Tidy the search cache before the fork to do a delivery from a message
1143 received from the command line. Otherwise the child will trigger a lookup
1144 failure and thereby defer the delivery if it tries to use (for example) a
1145 cached ldap connection that the parent has called unbind on.
1147 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1148 of $address_data from the recipient verification was clobbered by the
1149 sender verification.
1151 13. The value of address_data from a sender verification is now available in
1152 $sender_address_data in subsequent conditions in the ACL statement.
1154 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1156 15. Added a new option "connect=<time>" to callout options, to set a different
1159 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1160 was its contents. (It was OK if the option was not defined at all.)
1162 17. A "Completed" log line is now written for messages that are removed from
1163 the spool by the -Mrm option.
1165 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1166 information about exactly what failed.
1168 19. Added -dd to debug only the daemon process.
1170 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1171 handles timeouts, both on the server side and network timeouts. Renamed the
1172 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1174 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1175 It is now set to "smtps".
1177 22. $host_address is now set to the target address during the checking of
1178 ignore_target_hosts.
1180 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1181 being passed; this would have caused $sender_host_name to have been used if
1182 matching the list had actually called for a host name (not very likely,
1183 since this list is usually IP addresses). A host name is now passed as
1186 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1187 code that specifies a non-restarting handler (typically sigaction() in
1188 modern systems) in an attempt to fix a rare and obscure crash bug.
1190 25. Narrowed the window for a race in the daemon that could cause it to ignore
1191 SIGCHLD signals. This is not a major problem, because they are used only to
1192 wake it up if nothing else does.
1194 26. A malformed maildirsize file could cause Exim to calculate negative values
1195 for the mailbox size or file count. Odd effects could occur as a result.
1196 The maildirsize information is now recalculated if the size or filecount
1199 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1200 support for a long time. Removed HAVE_SYS_VFS_H.
1202 28. Installed the latest version of exipick from John Jetmore.
1204 29. In an address list, if the pattern was not a regular expression, an empty
1205 subject address (from a bounce message) matched only if the pattern was an
1206 empty string. Non-empty patterns were not even tested. This was the wrong
1207 because it is perfectly reasonable to use an empty address as part of a
1208 database query. An empty address is now tested by patterns that are
1209 lookups. However, all the other forms of pattern expect the subject to
1210 contain a local part and a domain, and therefore, for them, an empty
1211 address still always fails if the pattern is not itself empty.
1213 30. Exim went into a mad DNS loop when attempting to do a callout where the
1214 host was specified on an smtp transport, and looking it up yielded more
1215 than one IP address.
1217 31. Re-factored the code for checking spool and log partition space into a
1218 function that finds that data and another that does the check. The former
1219 is then used to implement four new variables: $spool_space, $log_space,
1220 $spool_inodes, and $log_inodes.
1222 32. The RFC2047 encoding function was originally intended for short strings
1223 such as real names; it was not keeping to the 75-character limit for
1224 encoded words that the RFC imposes. It now respects the limit, and
1225 generates multiple encoded words if necessary. To be on the safe side, I
1226 have increased the buffer size for the ${rfc2047: expansion operator from
1229 33. It is now permitted to omit both strings after an "if" condition; if the
1230 condition is true, the result is "true". As before, when the second string
1231 is omitted, a false condition yields an empty string. This makes it less
1232 cumbersome to write custom ACL and router conditions.
1234 34. Failure to deliver a bounce message always caused it to be frozen, even if
1235 there was an errors_to setting on the router. The errors_to setting is now
1238 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1239 canonical form (fully expanded) before being placed in
1240 $sender_host_address.
1242 36. The table in the code that translates DNS record types into text (T_A to
1243 "A" for instance) was missing entries for NS and CNAME. It is just possible
1244 that this could have caused confusion if both these types were looked up
1245 for the same domain, because the text type is used as part of Exim's
1246 per-process caching. But the chance of anyone hitting this buglet seems
1249 37. The dnsdb lookup has been extended in a number of ways.
1251 (1) There is a new type, "zns", which walks up the domain tree until it
1252 finds some nameserver records. It should be used with care.
1254 (2) There is a new type, "mxh", which is like "mx" except that it returns
1255 just the host names, not the priorities.
1257 (3) It is now possible to give a list of domains (or IP addresses) to be
1258 looked up. The behaviour when one of the lookups defers can be
1259 controlled by a keyword.
1261 (4) It is now possible to specify the separator character for use when
1262 multiple records are returned.
1264 38. The dnslists ACL condition has been extended: it is now possible to supply
1265 a list of IP addresses and/or domains to be looked up in a particular DNS
1268 39. Added log_selector=+queue_time_overall.
1270 40. When running the queue in the test harness, wait just a tad after forking a
1271 delivery process, to get repeatability of debugging output.
1273 41. Include certificate and key file names in error message when GnuTLS fails
1274 to set them up, because the GnuTLS error message doesn't include the name
1275 of the failing file when there is a problem reading it.
1277 42. Allow both -bf and -bF in the same test run.
1279 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1281 44. The "Exiscan patch" is now merged into the mainline Exim source.
1283 45. Sometimes the final signoff response after QUIT could fail to get
1284 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1285 < 0 before doing a fflush(). This bug looks as though it goes back to the
1286 introduction of TLS in release 3.20, but "sometimes" must have been rare
1287 because the tests only now provoked it.
1289 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1290 (this can affect the format of dates).
1292 47. exim_tidydb, when checking for the continued existence of a message for
1293 which it has found a message-specific retry record, was not finding
1294 messages that were in split spool directories. Consequently, it was
1295 deleting retry records that should have stayed in existence.
1297 48. Steve fixed some bugs in eximstats.
1299 49. The SPA authentication driver was not abandoning authentication and moving
1300 on to the next authenticator when an expansion was forced to fail,
1301 contradicting the general specification for all authenticators. Instead it
1302 was generating a temporary error. It now behaves as specified.
1304 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1305 (the order specifies the preference for clients). The order is now AES256,
1306 AES128, 3DES, ARCFOUR128.
1308 51. Small patch to Sieve code - explicitly set From: when generating an
1311 52. Exim crashed if a remote delivery caused a very long error message to be
1312 recorded - for instance if somebody sent an entire SpamAssassin report back
1313 as a large number of 550 error lines. This bug was coincidentally fixed by
1314 increasing the size of one of Exim's internal buffers (big_buffer) that
1315 happened as part of the Exiscan merge. However, to be on the safe side, I
1316 have made the code more robust (and fixed the comments that describe what
1319 53. Now that there can be additional text after "Completed" in log lines (if
1320 the queue_time_overall log selector is set), a one-byte patch to exigrep
1321 was needed to allow it to recognize "Completed" as not the last thing in
1324 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1325 patch that reportedly fixes this has been added. I am not expert enough to
1326 create a test for it. This is what the patch creator wrote:
1328 "I found a little strange behaviour of ldap code when working with
1329 Windows 2003 AD Domain, where users was placed in more than one
1330 Organization Units. When I tried to give exim partial DN, the exit code
1331 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1332 But simultaneously result of request was absolutely normal ldap result,
1333 so I produce this patch..."
1335 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1336 REFERENCE, so I have modified the code to exclude the patch when that macro
1339 55. Some experimental protocols are using DNS PTR records for new purposes. The
1340 keys for these records are domain names, not reversed IP addresses. The
1341 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1342 leaves it alone. Component reversal etc. now happens only for IP addresses.
1345 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1347 57. Double the size of the debug message buffer (to 2048) so that more of very
1348 long debug lines gets shown.
1350 58. The exicyclog utility now does better if the number of log files to keep
1351 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1353 59. Two changes related to the smtp_active_hostname option:
1355 (1) $smtp_active_hostname is now available as a variable.
1356 (2) The default for smtp_banner uses $smtp_active_hostname instead
1357 of $primary_hostname.
1359 60. The host_aton() function is supposed to be passed a string that is known
1360 to be a valid IP address. However, in the case of IPv6 addresses, it was
1361 not checking this. This is a hostage to fortune. Exim now panics and dies
1362 if the condition is not met. A case was found where this could be provoked
1363 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1364 components; fortuitously, this particular loophole had already been fixed
1365 by change 4.50/55 above.
1367 If there are any other similar loopholes, the new check in host_aton()
1368 itself should stop them being exploited. The report I received stated that
1369 data on the command line could provoke the exploit when Exim was running as
1370 exim, but did not say which command line option was involved. All I could
1371 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1372 running as the user.
1375 61. There was a buffer overflow vulnerability in the SPA authentication code
1376 (which came originally from the Samba project). I have added a test to the
1377 spa_base64_to_bits() function which I hope fixes it.
1380 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1381 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1383 63. The daemon start-up calls getloadavg() while still root for those OS that
1384 need the first call to be done as root, but it missed one case: when
1385 deliver_queue_load_max is set with deliver_drop_privilege. This is
1386 necessary for the benefit of the queue runner, because there is no re-exec
1387 when deliver_drop_privilege is set.
1389 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1390 This has been fixed.
1392 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1393 was in use, was not putting the data itself into the right store pool;
1394 consequently, it could be overwritten for a subsequent message in the same
1395 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1398 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1400 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1401 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1402 the function were treating the return as a boolean value, which happened to
1403 work because 0=false and not-0=true, but is not correct code.
1405 68. The host_aton() function was not handling scoped IPv6 addresses (those
1406 with, for example, "%eth0" on the end) correctly.
1408 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1409 negated items (that is, ~something) in unsigned ints. Some compilers
1410 apparently mutter when there is no cast.
1412 70. If an address verification called from an ACL failed, and did not produce a
1413 user-specific message (i.e. there was only a "system" message), nothing was
1414 put in $acl_verify_message. In this situation, it now puts the system
1417 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1418 session; change 4.31/43 added the unwanted input to the log line - except
1419 that it did not do this in the start of session case. It now does.
1421 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1422 This is wrong and can cause the other end to generate a synchronization
1423 error if it is another Exim or anything else that does the synchronization
1424 check. A QUIT command is no longer sent after a timeout.
1426 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1427 during host lookups.
1429 74. The defer_ok option of callout verification was not working if it was used
1430 when verifying addresses in header lines, that is, for this case:
1432 verify = header_sender/callout=defer_ok
1434 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1435 those file descriptors could be used for SMTP connections. If anything
1436 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1437 could be sent to the SMTP client, causing chaos. The daemon now opens
1438 stdin, stdout, and stderr to /dev/null when it puts itself into the
1441 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1442 log by default. The user can override this with suitable Perl magic.
1444 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1445 the log message when discard triggers, was not working for the DATA ACL or
1446 for the non-SMTP ACL.
1448 78. Error message wording change in sieve.c.
1450 79. If smtp_accept_max_per_host was set, the number of connections could be
1451 restricted to fewer than expected, because the daemon was trying to set up
1452 a new connection before checking whether the processes handling previous
1453 connections had finished. The check for completed processes is now done
1454 earlier. On busy systems, this bug wouldn't be noticed because something
1455 else would have woken the daemon, and it would have reaped the completed
1458 80. If a message was submitted locally by a user whose login name contained one
1459 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1460 It caused a spool format error. I have fixed the spool reading code. A
1461 related problem was that the "from" clause in the Received: line became
1462 illegal because of the space(s). It is now covered by ${quote_local_part.
1464 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1467 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1469 83. Patch from Sieve maintainer to fix unterminated string problem in
1470 "vacation" handling.
1472 84. Some minor changes to the Linux configuration files to help with other
1473 OS variants using glibc.
1475 85. One more patch for Sieve to update vacation handling to latest spec.
1478 ----------------------------------------------------
1479 See the note above about the 4.44 and 4.50 releases.
1480 ----------------------------------------------------
1486 1. Change 4.43/35 introduced a bug that caused file counts to be
1487 incorrectly computed when quota_filecount was set in an appendfile
1490 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1491 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1494 3. Give more explanation in the error message when the command for a transport
1495 filter fails to execute.
1497 4. There are several places where Exim runs a non-Exim command in a
1498 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1499 was being done only for the command run by the queryprogram router. It is
1500 now done for all such subprocesses. The other cases are: ${run, transport
1501 filters, and the commands run by the lmtp and pipe transports.
1503 5. Some older OS have a limit of 256 on the maximum number of file
1504 descriptors. Exim was using setrlimit() to set 1000 as a large value
1505 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1506 systems. I've change it so that if it can't get 1000, it tries for 256.
1508 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1509 was an oversight, and furthermore, ever since the addition of extra
1510 controls (e.g. 4.43/32), the checks on when to allow different forms of
1511 "control" were broken. There should now be diagnostics for all cases when a
1512 control that does not make sense is encountered.
1514 7. $recipients is now available in the predata ACL (oversight).
1516 8. Tidy the search cache before the fork to do a delivery from a message
1517 received from the command line. Otherwise the child will trigger a lookup
1518 failure and thereby defer the delivery if it tries to use (for example) a
1519 cached ldap connection that the parent has called unbind on.
1521 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1522 of $address_data from the recipient verification was clobbered by the
1523 sender verification.
1525 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1526 was its contents. (It was OK if the option was not defined at all.)
1528 11. A "Completed" log line is now written for messages that are removed from
1529 the spool by the -Mrm option.
1531 12. $host_address is now set to the target address during the checking of
1532 ignore_target_hosts.
1534 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1535 being passed; this would have caused $sender_host_name to have been used if
1536 matching the list had actually called for a host name (not very likely,
1537 since this list is usually IP addresses). A host name is now passed as
1540 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1541 code that specifies a non-restarting handler (typically sigaction() in
1542 modern systems) in an attempt to fix a rare and obscure crash bug.
1544 15. Narrowed the window for a race in the daemon that could cause it to ignore
1545 SIGCHLD signals. This is not a major problem, because they are used only to
1546 wake it up if nothing else does.
1548 16. A malformed maildirsize file could cause Exim to calculate negative values
1549 for the mailbox size or file count. Odd effects could occur as a result.
1550 The maildirsize information is now recalculated if the size or filecount
1553 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1554 support for a long time. Removed HAVE_SYS_VFS_H.
1556 18. Updated exipick to current release from John Jetmore.
1558 19. Allow an empty sender to be matched against a lookup in an address list.
1559 Previously the only cases considered were a regular expression, or an
1562 20. Exim went into a mad DNS lookup loop when doing a callout where the
1563 host was specified on the transport, if the DNS lookup yielded more than
1566 21. The RFC2047 encoding function was originally intended for short strings
1567 such as real names; it was not keeping to the 75-character limit for
1568 encoded words that the RFC imposes. It now respects the limit, and
1569 generates multiple encoded words if necessary. To be on the safe side, I
1570 have increased the buffer size for the ${rfc2047: expansion operator from
1573 22. Failure to deliver a bounce message always caused it to be frozen, even if
1574 there was an errors_to setting on the router. The errors_to setting is now
1577 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1578 canonical form (fully expanded) before being placed in
1579 $sender_host_address.
1581 24. Updated eximstats to version 1.33
1583 25. Include certificate and key file names in error message when GnuTLS fails
1584 to set them up, because the GnuTLS error message doesn't include the name
1585 of the failing file when there is a problem reading it.
1587 26. Expand error message when OpenSSL has problems setting up cert/key files.
1590 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1591 (this can affect the format of dates).
1593 28. exim_tidydb, when checking for the continued existence of a message for
1594 which it has found a message-specific retry record, was not finding
1595 messages that were in split spool directories. Consequently, it was
1596 deleting retry records that should have stayed in existence.
1598 29. eximstats updated to version 1.35
1599 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1600 1.35 - bugfix such that pie charts by volume are generated correctly
1602 30. The SPA authentication driver was not abandoning authentication and moving
1603 on to the next authenticator when an expansion was forced to fail,
1604 contradicting the general specification for all authenticators. Instead it
1605 was generating a temporary error. It now behaves as specified.
1607 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1608 (the order specifies the preference for clients). The order is now AES256,
1609 AES128, 3DES, ARCFOUR128.
1611 31. Small patch to Sieve code - explicitly set From: when generating an
1614 32. Exim crashed if a remote delivery caused a very long error message to be
1615 recorded - for instance if somebody sent an entire SpamAssassin report back
1616 as a large number of 550 error lines. This bug was coincidentally fixed by
1617 increasing the size of one of Exim's internal buffers (big_buffer) that
1618 happened as part of the Exiscan merge. However, to be on the safe side, I
1619 have made the code more robust (and fixed the comments that describe what
1622 33. Some experimental protocols are using DNS PTR records for new purposes. The
1623 keys for these records are domain names, not reversed IP addresses. The
1624 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1625 leaves it alone. Component reversal etc. now happens only for IP addresses.
1628 34. The host_aton() function is supposed to be passed a string that is known
1629 to be a valid IP address. However, in the case of IPv6 addresses, it was
1630 not checking this. This is a hostage to fortune. Exim now panics and dies
1631 if the condition is not met. A case was found where this could be provoked
1632 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1633 components; fortuitously, this particular loophole had already been fixed
1634 by change 4.50/55 or 4.44/33 above.
1636 If there are any other similar loopholes, the new check in host_aton()
1637 itself should stop them being exploited. The report I received stated that
1638 data on the command line could provoke the exploit when Exim was running as
1639 exim, but did not say which command line option was involved. All I could
1640 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1641 running as the user.
1644 35. There was a buffer overflow vulnerability in the SPA authentication code
1645 (which came originally from the Samba project). I have added a test to the
1646 spa_base64_to_bits() function which I hope fixes it.
1649 36. The daemon start-up calls getloadavg() while still root for those OS that
1650 need the first call to be done as root, but it missed one case: when
1651 deliver_queue_load_max is set with deliver_drop_privilege. This is
1652 necessary for the benefit of the queue runner, because there is no re-exec
1653 when deliver_drop_privilege is set.
1655 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1656 was in use, was not putting the data itself into the right store pool;
1657 consequently, it could be overwritten for a subsequent message in the same
1658 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1661 38. Sometimes the final signoff response after QUIT could fail to get
1662 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1663 < 0 before doing a fflush(). This bug looks as though it goes back to the
1664 introduction of TLS in release 3.20, but "sometimes" must have been rare
1665 because the tests only now provoked it.
1671 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1672 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1673 Now it returns an integer. A number of calls were still expecting a T/F
1674 return. Fortuitously, in all cases, the tests worked in OK situations,
1675 which is the norm. However, things would have gone wrong on any write
1676 failures on the smtp file descriptor. This function is used when sending
1677 messages over SMTP and also when doing verify callouts.
1679 2. When Exim is called to do synchronous delivery of a locally submitted
1680 message (the -odf or -odi options), it no longer closes stderr before doing
1683 3. Implemented the mua_wrapper option.
1685 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1687 5. Implemented the functions header_remove(), header_testname(),
1688 header_add_at_position(), and receive_remove_recipient(), and exported them
1691 6. If an ACL "warn" statement specified the addition of headers, Exim already
1692 inserted X-ACL-Warn: at the start if there was no header name. However, it
1693 was not making this test for the second and subsequent header lines if
1694 there were newlines in the string. This meant that an invalid header could
1695 be inserted if Exim was badly configured.
1697 7. Allow an ACL "warn" statement to add header lines at the start or after all
1698 the Received: headers, as well as at the end.
1700 8. Added the rcpt_4xx retry error code.
1702 9. Added postmaster_mailfrom=xxx to callout verification option.
1704 10. Added mailfrom=xxxx to the callout verification option, for verify=
1707 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1708 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1710 12. Inserted some casts to stop certain compilers warning when using pointer
1711 differences as field lengths or precisions in printf-type calls (mostly
1712 affecting debugging statements).
1714 13. Added optional readline() support for -be (dynamically loaded).
1716 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1717 same clock tick as a message's arrival, so that its received time was the
1718 same as the "first fail" time on the retry record, and that message
1719 remained on the queue past the ultimate address timeout, every queue runner
1720 would try a delivery (because it was past the ultimate address timeout) but
1721 after another failure, the ultimate address timeout, which should have then
1722 bounced the address, did not kick in. This was a "< instead of <=" error;
1723 in most cases the first failure would have been in the next clock tick
1724 after the received time, and all would be well.
1726 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1727 being recognized when the domain list was tested by the match_domain
1728 condition in an expansion string.
1730 16. Added the ${str2b64: operator.
1732 17. Exim was always calling setrlimit() to set a large limit for the number of
1733 processes, without checking whether the existing limit was already
1734 adequate. (It did check for the limit on file descriptors.) Furthermore,
1735 errors from getrlimit() and setrlimit() were being ignored. Now they are
1736 logged to the main and panic logs, but Exim does carry on, to try to do its
1737 job under whatever limits there are.
1739 18. Imported PCRE 5.0.
1741 19. Trivial typo in log message " temporarily refused connection" (the leading
1744 20. If the log selector return_path_on_delivery was set and an address was
1745 redirected to /dev/null, the delivery process crashed because it assumed
1746 that a return path would always be set for a "successful" delivery. In this
1747 case, the whole delivery is bypassed as an optimization, and therefore no
1750 21. Internal re-arrangement: the function for sending a challenge and reading
1751 a response while authentication was assuming a zero-terminated challenge
1752 string. It's now changed to take a pointer and a length, to allow for
1753 binary data in such strings.
1755 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1757 23. Exim was not respecting finduser_retries when seeking the login of the
1758 uid under which it was called; it was always trying 10 times. (The default
1759 setting of finduser_retries is zero.) Also, it was sleeping after the final
1760 failure, which is pointless.
1762 24. Implemented tls_on_connect_ports.
1764 25. Implemented acl_smtp_predata.
1766 26. If the domain in control=submission is set empty, Exim assumes that the
1767 authenticated id is a complete email address when it generates From: or
1768 Sender: header lines.
1770 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1771 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1772 chown and chgrp in /bin and hostname in /usr/bin.
1774 28. Exim was keeping the "process log" file open after each use, just as it
1775 does for the main log. This opens the possibility of it remaining open for
1776 long periods when the USR1 signal hits a daemon. Occasional processlog
1777 errors were reported, that could have been caused by this. Anyway, it seems
1778 much more sensible not to leave this file open at all, so that is what now
1781 29. The long-running daemon process does not normally write to the log once it
1782 has entered its main loop, and it closes the log before doing so. This is
1783 so that log files can straightforwardly be renamed and moved. However,
1784 there are a couple of unusual error situations where the daemon does write
1785 log entries, and I had neglected to close the log afterwards.
1787 30. The text of an SMTP error response that was received during a remote
1788 delivery was being truncated at 512 bytes. This is too short for some of
1789 the long messages that one sometimes sees. I've increased the limit to
1792 31. It is now possible to make retry rules that apply only when a message has a
1793 specific sender, in particular, an empty sender.
1795 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1796 it possible to be selective about when SMTP synchronization is enforced.
1798 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1800 32. Implemented hosts_connection_nolog.
1802 33. Added an ACL for QUIT.
1804 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1807 35. Added mailbox_size and mailbox_filecount to appendfile.
1809 36. Added control = no_multiline_responses to ACLs.
1811 37. There was a bug in the logic of the code that waits for the clock to tick
1812 in the case where the clock went backwards by a substantial amount such
1813 that the microsecond fraction of "now" was more than the microsecond
1814 fraction of "then" (but the whole seconds number was less).
1816 38. Added support for the libradius Radius client library this is found on
1817 FreeBSD (previously only the radiusclient library was supported).
1823 1. When certain lookups returned multiple values in the form name=value, the
1824 quoting of the values was not always being done properly. Specifically:
1825 (a) If the value started with a double quote, but contained no whitespace,
1827 (b) If the value contained whitespace other than a space character (i.e.
1828 tabs or newlines or carriage returns) it was not quoted.
1829 This fix has been applied to the mysql and pgsql lookups by writing a
1830 separate quoting function and calling it from the lookup code. The fix
1831 should probably also be applied to nisplus, ibase and oracle lookups, but
1832 since I cannot test any of those, I have not disturbed their existing code.
1834 2. A hit in the callout cache for a specific address caused a log line with no
1835 reason for rejecting RCPT. Now it says "Previous (cached) callout
1836 verification failure".
1838 3. There was an off-by-one bug in the queryprogram router. An over-long
1839 return line was truncated at 256 instead of 255 characters, thereby
1840 overflowing its buffer with the terminating zero. As well as fixing this, I
1841 have increased the buffer size to 1024 (and made a note to document this).
1843 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1844 when Exim is waiting for an SMTP response from a remote server, Exim
1845 restarts its select() call on the socket, thereby resetting its timeout.
1846 This is not a problem when such interrupts are rare. Somebody set up a cron
1847 job to run exiwhat every 2 minutes, which is less than the normal select()
1848 timeout (5 or 10 minutes). This meant that the select() timeout never
1849 kicked in because it was always reset. I have fixed this by comparing the
1850 time when an interrupt arrives with the time at the start of the first call
1851 to select(). If more time than the timeout has elapsed, the interrupt is
1852 treated as a timeout.
1854 5. Some internal re-factoring in preparation for the addition of Sieve
1855 extensions (by MH). In particular, the "personal" test is moved to a
1856 separate function, and given an option for scanning Cc: and Bcc: (which is
1857 not set for Exim filters).
1859 6. When Exim created an email address using the login of the caller as the
1860 local part (e.g. when creating a From: or Sender: header line), it was not
1861 quoting the local part when it contained special characters such as @.
1863 7. Installed new OpenBSD configuration files.
1865 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1866 try to make them clearer.
1868 9. Callout options, other than the timeout value, were being ignored when
1869 verifying sender addresses in header lines. For example, when using
1871 verify = header_sender/callout=no_cache
1873 the cache was (incorrectly) being used.
1875 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1876 only the Cygwin environment.
1878 11. When return_path_on_delivery was set as a log selector, if different remote
1879 addresses in the same message used different return paths and parallel
1880 remote delivery occurred, the wrong values would sometimes be logged.
1881 (Whenever a remote delivery process finished, the return path value from
1882 the most recently started remote delivery process was logged.)
1884 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1885 lines when AUTH and/or TLS are in use. This is the "received protocol"
1886 field. Exim used to use "asmtp" for authenticated SMTP, without any
1887 indication (in the protocol name) for TLS use. Now it follows the RFC and
1888 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1889 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1890 names appear in log lines as well as in Received: header lines.
1892 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1893 extensions, and comparison tests, and to fix some bugs.
1895 14. Changes to the "personal" filter test:
1897 (1) The test was buggy in that it was just doing the equivalent of
1898 "contains" tests on header lines. For example, if a user's address was
1899 anne@some.where, the "personal" test would incorrectly be true for
1901 To: susanne@some.where
1903 This test is now done by extracting each address from the header in turn,
1904 and checking the entire address. Other tests that are part of "personal"
1905 are now done using regular expressions (for example, to check local parts
1906 of addresses in From: header lines).
1908 (2) The list of non-personal local parts in From: addresses has been
1909 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1910 taken from the Sieve specification recommendations.
1912 (3) If the message contains any header line starting with "List-" it is
1913 treated as non-personal.
1915 (4) The test for "circular" in the Subject: header line has been removed
1916 because it now seems ill-conceived.
1918 15. Minor typos in src/EDITME comments corrected.
1920 16. Installed latest exipick from John Jetmore.
1922 17. If headers_add on a router specified a text string that was too long for
1923 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1924 of string_sprintf() is now avoided.
1926 18. $message_body_size was not set (it was always zero) when running the DATA
1927 ACL and the local_scan() function.
1929 19. For the "mail" command in an Exim filter, no default was being set for
1930 the once_repeat time, causing a random time value to be used if "once" was
1931 specified. (If the value happened to be <= 0, no repeat happened.) The
1932 default is now 0s, meaning "never repeat". The "vacation" command was OK
1933 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1934 (I found it when inspecting the code).
1936 20. There is now an overall timeout for performing a callout verification. It
1937 defaults to 4 times the callout timeout, which applies to individual SMTP
1938 commands during the callout. The overall timeout applies when there is more
1939 than one host that can be tried. The timeout is checked before trying the
1940 next host. This prevents very long delays if there are a large number of
1941 hosts and all are timing out (e.g. when the network connections are timing
1942 out). The value of the overall timeout can be changed by specifying an
1943 additional sub-option for "callout", called "maxwait". For example:
1945 verify = sender/callout=5s,maxwait=20s
1947 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1948 to the end before writing, but this should make it even safer).
1950 22. Exim was forgetting that it had advertised PIPELINING for the second and
1951 subsequent messages on an SMTP connection. It was also not resetting its
1952 memory on STARTTLS and an internal HELO.
1954 23. When Exim logs an SMTP synchronization error within a session, it now
1955 records whether PIPELINING has been advertised or not.
1957 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1958 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1959 rather than long int.
1961 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1963 26. Added the never_mail option to autoreply.
1969 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1970 crash if the getsockname() call failed; this can happen if a connection is
1971 closed very soon after it is established. The problem was simply in the
1972 order in which certain operations were done, causing Exim to try to write
1973 to the SMTP stream before it had set up the file descriptor. The bug has
1974 been fixed by making things happen in the correct order.
1980 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1981 before the connection was closed, thus losing the rejection response.
1983 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1984 some early Solaris releases, but causes trouble in current releases where
1985 socklen_t is defined.
1987 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1990 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1993 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1994 that releasing the top of it at the end releases what was used for sub-
1995 expansions (unless the block got too big). However, discard this block if
1996 the first thing is a variable or header, so that we can use its block when
1997 it is dynamic (useful for very large $message_headers, for example).
1999 6. Lookups now cache *every* query, not just the most recent. A new, separate
2000 store pool is used for this. It can be recovered when all lookup caches are
2001 flushed. Lookups now release memory at the end of their result strings.
2002 This has involved some general refactoring of the lookup sources.
2004 7. Some code has been added to the store_xxx() functions to reduce the amount
2005 of flapping under certain conditions.
2007 8. log_incoming_interface used to affect only the <= reception log lines. Now
2008 it causes the local interface and port to be added to several more SMTP log
2009 lines, for example "SMTP connection from", and rejection lines.
2011 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2013 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2015 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2016 could be overwritten at the end of the current message (or the start of a
2017 new message if it was set in a HELO ACL). The value is now preserved for
2018 the duration of the SMTP connection.
2020 12. If a transport had a headers_rewrite setting, and a matching header line
2021 contained an unqualified address, that address was qualified, even if it
2022 did not match any rewriting rules. The underlying bug was that the values
2023 of the flags that permit the existence of unqualified sender and recipient
2024 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2025 non-local messages, and by -bnq for local messages) were not being
2026 preserved with the message after it was received.
2028 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2029 "next input=" as part of the text comprising the host identity instead of
2030 the correct text. The code was using the same buffer for two different
2031 strings. However, depending on which order the printing function evaluated
2032 its arguments, the bug did not always show up. Under Linux, for example, my
2033 test suite worked just fine.
2035 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2036 doesn't work with some older versions of Perl. It has been changed to "my",
2037 which in any case is probably the better facility to use.
2039 15. A really picky compiler found some instances of statements for creating
2040 error messages that either had too many or two few arguments for the format
2043 16. The size of the buffer for calls to the DNS resolver has been increased
2044 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2045 for addresses that have a lot of PTR records. This alleviates a problem; it
2046 does not fully solve it.
2048 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2049 buffer now truncates the list and logs the incident, which is the same
2050 action as happens when Exim is looking up a host name and its aliases.
2051 Previously in this situation something unpredictable would happen;
2052 sometimes it was "internal error: store_reset failed".
2054 18. If a server dropped the connection unexpectedly when an Exim client was
2055 using GnuTLS and trying to read a response, the client delivery process
2056 crashed while trying to generate an error log message.
2058 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2059 string, for example:
2061 warn message = H1: something\nH2: something
2063 the text was added as a single header line from Exim's point of view
2064 though it ended up OK in the delivered message. However, searching for the
2065 second and subsequent header lines using $h_h2: did not work. This has been
2066 fixed. Similarly, if a system filter added multiple headers in this way,
2067 the routers could not see them.
2069 20. Expanded the error message when iplsearch is called with an invalid key to
2070 suggest using net-iplsearch in a host list.
2072 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2073 ACLs are no longer actually imposed (and a message to that effect is
2076 22. If a "gecos" field in a passwd entry contained escaped characters, in
2077 particular, if it contained a \" sequence, Exim got it wrong when building
2078 a From: or a Sender: header from that name. A second bug also caused
2079 incorrect handling when an unquoted " was present following a character
2080 that needed quoting.
2082 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2083 was not being matched caselessly.
2085 24. Arranged for all hyphens in the exim.8 source to be escaped with
2088 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2089 properly. Recipient callout cache records were still being keyed to include
2090 the sender, even when use_sender was set false. This led to far more
2091 callouts that were necessary. The sender is no longer included in the key
2092 when use_sender is false.
2094 26. Added "control = submission" modifier to ACLs.
2096 27. Added the ${base62d: operator to decode base 62 numbers.
2098 28. dnsdb lookups can now access SRV records.
2100 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2101 the configuration file.
2103 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2104 (-v) mode. This makes the output for a verbose queue run more intelligible.
2106 31. Added a use_postmaster feature to recipient callouts.
2108 32. Added the $body_zerocount variable, containing the number of binary zero
2109 bytes in the message body.
2111 33. The time of last modification of the "new" subdirectory is now used as the
2112 "mailbox time last read" when there is a quota error for a maildir
2115 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2117 35. Added +ignore_unknown as a special item in host lists.
2119 36. Code for decoding IPv6 addresses in host lists is now included, even if
2120 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2121 address was recognized as an IP address, but was then not correctly decoded
2122 into binary, causing unexpected and incorrect effects when compared with
2129 1. Very minor rewording of debugging text in manualroute to say "list of
2130 hosts" instead of "hostlist".
2132 2. If verify=header_syntax was set, and a header line with an unqualified
2133 address (no domain) and a large number of spaces between the end of the
2134 name and the colon was received, the reception process suffered a buffer
2135 overflow, and (when I tested it) crashed. This was caused by some obsolete
2136 code that should have been removed. The fix is to remove it!
2138 3. When running in the test harness, delay a bit after writing a bounce
2139 message to get a bit more predictability in the log output.
2141 4. Added a call to search_tidyup() just before forking a reception process. In
2142 theory, someone could use a lookup in the expansion of smtp_accept_max_
2143 per_host which, without the tidyup, could leave open a database connection.
2145 5. Added the variables $recipient_data and $sender_data which get set from a
2146 lookup success in an ACL "recipients" or "senders" condition, or a router
2147 "senders" option, similar to $domain_data and $local_part_data.
2149 6. Moved the writing of debug_print from before to after the "senders" test
2152 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2153 problems for message scanning, either using a data ACL, or using
2154 local_scan() because the Received: header was not generated till after they
2155 were called (in order to set the time as the time of reception completion).
2156 I have revised the way this works. The header is now generated after the
2157 body is received, but before the ACL or local_scan() are called. After they
2158 are run, the timestamp in the header is updated.
2164 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2165 before starting a queue runner without re-exec. This happened only when
2166 deliver_drop_privilege was set or when the Exim user was set to root. The
2167 effect of the bug was that timeouts during subsequent deliveries caused
2168 crashes instead of being properly handled. The handler is now left at its
2169 default (and expected) setting.
2171 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2172 message, again when deliver_drop_privilege is set or Exim is run as root.
2173 The bug described in (1) was not present in this case, but the tidying up
2174 of the other signals was missing. I have made the two cases consistent.
2176 3. The ignore_target_hosts setting on a manualroute router was being ignored
2177 for hosts that were looked up using the /MX notation.
2179 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2182 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2183 operated on the sender address. After changing the $sender_address to <>
2184 for the sender address verify, Exim was re-instated it as the original
2185 (before rewriting) address, but remembering that it had rewritten it, so it
2186 wasn't rewriting it again. This bug also had the effect of breaking the
2187 sender address verification caching when the sender address was rewritten.
2189 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2190 This has been changed so that if the ip literal address matches
2191 ignore_target_hosts, the router declines.
2193 7. Added expansion conditions match_domain, match_address, and match_local_
2194 part (NOT match_host).
2196 8. The placeholder for the Received: header didn't have a length field set.
2198 9. Added code to Exim itself and to exim_lock to test for a specific race
2199 condition that could lead to file corruption when using MBX delivery. The
2200 issue is with the lockfile that is created in /tmp. If this file is removed
2201 after a process has opened it but before that process has acquired a lock,
2202 there is the potential for a second process to recreate the file and also
2203 acquire a lock. This could lead to two Exim processes writing to the file
2204 at the same time. The added code performs the same test as UW imapd; it
2205 checks after acquiring the lock that its file descriptor still refers to
2206 the same named file.
2208 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2209 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2212 11. Added the smtp_active_hostname option. If used, this will typically be made
2213 to depend on the incoming interface address. Because $interface_address is
2214 not set up until the daemon has forked a reception process, error responses
2215 that can happen earlier (such as "too many connections") no longer contain
2218 12. If an expansion in a condition on a "warn" statement fails because a lookup
2219 defers, the "warn" statement is abandoned, and the next ACL statement is
2220 processed. Previously this caused the whole ACL to be aborted.
2222 13. Added the iplsearch lookup type.
2224 14. Added ident_timeout as a log selector.
2226 15. Added tls_certificate_verified as a log selector.
2228 16. Added a global option tls_require_ciphers (compare the smtp transport
2229 option of the same name). This controls incoming TLS connections.
2231 17. I finally figured out how to make tls_require_ciphers do a similar thing
2232 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2233 before starting the TLS session.
2235 18. Tabs are now shown as \t in -bP output.
2237 19. If the log selector return_path_on_delivery was set, Exim crashed when
2238 bouncing a message because it had too many Received: header lines.
2240 20. If two routers both had headers_remove settings, and the first one included
2241 a superfluous trailing colon, the final name in the first list and the
2242 first name in the second list were incorrectly joined into one item (with a
2243 colon in the middle).
2249 1. Added -C and -D options to the exinext utility, mainly to make it easier
2250 to include in the automated testing, but these could be helpful when
2251 multiple configurations are in use.
2253 2. The exinext utility was not formatting the output nicely when there was
2254 an alternate port involved in the retry record key, nor when there was a
2255 message id as well (for retries that were specific to a specific message
2256 and a specific host). It was also confused by IPv6 addresses, because of
2257 the additional colons they contain. I have fixed the IPv4 problem, and
2258 patched it up to do a reasonable job for IPv6.
2260 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2261 delivery, the log line now contains "pipelined" if PIPELINING was used.
2263 4. An SMTP transport process used to panic and die if the bind() call to set
2264 an explicit outgoing interface failed. This has been changed; it is now
2265 treated in the same way as a connect() failure.
2267 5. A reference to $sender_host_name in the part of a conditional expansion
2268 that was being skipped was still causing a DNS lookup. This no longer
2271 6. The def: expansion condition was not recognizing references to header lines
2272 that used bh_ and bheader_.
2274 7. Added the _cache feature to named lists.
2276 8. The code for checking quota_filecount in the appendfile transport was
2277 allowing one more file than it should have been.
2279 9. For compatibility with Sendmail, the command line option
2287 and sets the incoming protocol and host name (for trusted callers). The
2288 host name and its colon can be omitted when only the protocol is to be set.
2289 Note the Exim already has two private options, -pd and -ps, that refer to
2290 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2291 "s", but I don't think that's a major issue.
2293 10. A number of refactoring changes to the code, none of which should affect
2296 (a) The number of logging options was getting close to filling up the
2297 32-bit word that was used as a bit map. I have split them into two classes:
2298 those that are passed in the argument to log_write(), and those that are
2299 only ever tested independently outside of that function. These are now in
2300 separate 32-bit words, so there is plenty of room for expansion again.
2301 There is no change in the user interface or the logging behaviour.
2303 (b) When building, for example, log lines, the code previously used a
2304 macro that called string_cat() twice, in order to add two strings. This is
2305 not really sufficiently general. Furthermore, there was one instance where
2306 it was actually wrong because one of the argument was used twice, and in
2307 one call a function was used. (As it happened, calling the function twice
2308 did not affect the overall behaviour.) The macro has been replaced by a
2309 function that can join an arbitrary number of extra strings onto a growing
2312 (c) The code for expansion conditions now uses a table and a binary chop
2313 instead of a serial search (which was left over from when there were very
2314 few conditions). Also, it now recognizes conditions like "pam" even when
2315 the relevant support is not compiled in: a suitably worded error message is
2316 given if an attempt is made to use such a condition.
2318 11. Added ${time_interval:xxxxx}.
2320 12. A bug was causing one of the ddress fields not to be passed back correctly
2321 from remote delivery subprocesses. The field in question was not being
2322 subsequently used, so this caused to problems in practice.
2324 13. Added new log selectors queue_time and deliver_time.
2326 14. Might have fixed a bug in maildirsizefile handling that threw up
2327 "unexpected character" debug warnings, and recalculated the data
2328 unnecessarily. In any case, I expanded the warning message to give more
2331 15. Added the message "Restricted characters in address" to the statements in
2332 the default ACL that block characters like @ and % in local parts.
2334 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2335 Three changes have been made:
2337 (a) There was a serious bug; a negative response to MAIL caused the whole
2338 recipient domain to be cached as invalid, thereby blocking all messages
2339 to all local parts at the same domain, from all senders. This bug has
2340 been fixed. The domain is no longer cached after a negative response to
2341 MAIL if the sender used is not empty.
2343 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2346 (c) A new callout option, "use_sender" has been added for people who want
2347 the modified behaviour.
2353 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2356 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2357 indeed breaks things for older releases.
2359 3. Added additional logging to the case where there is a problem reading data
2360 from a filter that is running in a subprocess using a pipe, in order to
2361 try to track down a specific problem.
2363 4. Testing facility fudge: when running in the test harness and attempting
2364 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2365 getting "No route to host". Convert this to a timeout.
2367 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2370 6. Some OS don't have socklen_t but use size_t instead. This affects the
2371 fifth argument of getsockopt() amongst other things. This is now
2372 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2373 can be set for individual OS. I have set it for SunOS5, OSF1, and
2374 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2375 some earlier ones do not.
2377 7. Change 4.30/15 was not doing the test caselessly.
2379 8. The standard form for an IPv6 address literal was being rejected by address
2380 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2381 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2382 this, as well as the form without the "IPv6" on the front (but only when
2383 address literals are enabled, of course).
2385 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2387 10. Exim crashed if a message with an empty sender address specified by -f
2388 encountered a router with an errors_to setting. This could be provoked only
2389 by a command such as
2393 where an empty string was supplied; "<>" did not hit this bug.
2395 11. Installed PCRE release 4.5.
2397 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2398 remained set. It is now erased.
2400 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2401 times from message ids (which are base 36 rather than the normal 62).
2403 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2404 were being counted as actual protocol errors, and logged if the log
2405 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2406 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2407 and DATA following a set of rejected RCPTs do not count as protocol errors.
2408 In other words, Exim assumes they were pipelined, though this may not
2409 actually be the case. Of course, in all cases the client gets an
2410 appropriate error code.
2412 15. If a lookup fails in an ACL condition, a message about the failure may
2413 be available; it is used if testing the ACL cannot continue, because most
2414 such messages specify what the cause of the deferral is. However, some
2415 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2416 that caused an old message to be retained and used if a later statement
2417 caused a defer, replacing the real cause of the deferral.
2419 16. If an IP address had so many PTR records that the DNS lookup buffer
2420 was not large enough to hold them, Exim could crash while trying to process
2421 the truncated data. It now detects and logs this case.
2423 17. Further to 4.21/58, another change has been made: if (and only if) the
2424 first line of a message (the first header line) ends with CRLF, a bare LF
2425 in a subsequent header line has a space inserted after it, so as not to
2426 terminate the header.
2428 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2429 unnecessarily, used atoi() instead of strtol(), and didn't check the
2430 termination when getting file sizes from file names by regex.
2432 19. Completely re-implemented the support for maildirsize files, in the light
2433 of a number of problems with the previous contributed implementation
2434 (4.30/29). In particular:
2436 . If the quota is zero, the maildirsize file is maintained, but no quota is
2439 . If the maildir directory does not exist, it is created before any attempt
2440 to write a maildirsize file.
2442 . The quota value in the file is just a cache; if the quota is changed in
2443 the transport, the new value overrides.
2445 . A regular expression is available for excluding directories from the
2448 20. The autoreply transport checks the characters in options that define the
2449 message's headers; it allows continued headers, but it was checking with
2450 isspace() after an embedded newline instead of explicitly looking for a
2453 21. If all the "regular" hosts to which an address was routed had passed their
2454 expiry times, and had not reached their retry times, the address was
2455 bounced, even if fallback hosts were defined. Now Exim should go on to try
2458 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2459 equivalent code in the SMTP transport. Some hosts send humungous responses
2460 to HELO/EHLO, more than 1024 it seems.
2462 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2463 gives compiler warnings in some environments. I've now done it "properly",
2466 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2467 (because of problems with the built-in one) was declared to return uschar *
2468 instead of char *, causing compiler failure.
2470 25. Fixed a file descriptor leak when processing alias/forward files.
2472 26. Fixed a minor format string issue in dbfn.c.
2474 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2476 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2477 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2480 29. When a sender address is verified, it is cached, to save repeating the test
2481 when there is more than one recipient in a message. However, when the
2482 verification involves a callout, it is possible for different callout
2483 options to be set for different recipients. It is too complicated to keep
2484 track of this in the cache, so now Exim always runs a verification when a
2485 callout is required, relying on the callout cache for the optimization.
2486 The overhead is duplication of the address routing, but this should not be
2489 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2490 to be verified with callout=postmaster, and the main callout worked but the
2491 postmaster check failed, the verification correctly failed. However, if a
2492 subsequent RCPT command asked for sender verification *without* the
2493 postmaster check, incorrect caching caused this verification also to fail,
2496 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2497 it was not caching the DNS options (qualify_single, search_parents) that
2498 were used when the lookup failed. A subsequent lookup with different
2499 options therefore always gave the same answer, though there were cases
2500 where it should not have. (Example: a "domains = !$mx_any" option on a
2501 dnslookup router: the "domains" option is always processed without any
2502 widening, but the router might have qualify_single set.) Now Exim uses the
2503 cached value only when the same options are set.
2505 32. Added John Jetmore's "exipick" utility to the distribution.
2507 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2508 than a timeout (e.g. a certificate is required, and is not provided), an
2509 Exim server now closes the connection immediately. Previously it waited for
2510 the client to close - but if the client is SSL, it seems that they each
2511 wait for each other, leading to a delay before one of them times out.
2513 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2514 maintained 0.8.x compatibility because I don't think many are using it, and
2515 it is clearly obsolete.
2517 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2520 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2521 client certificate was expired. A simple patch fixes this, though I don't
2522 understand the full logic of why the verify callback is called multiple
2525 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2526 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2527 which causes problems with some clients (such as the Certicom SSL Plus
2528 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2529 disables the coutermeasure allowing Eudora to connect."
2531 38. Exim was not checking that a write() to a log file succeeded. This could
2532 lead to Bad Things if a log got too big, in particular if it hit a file
2533 size limit. Exim now panics and dies if it cannot write to a log file, just
2534 as it does if it cannot open a log file.
2536 39. Modified OS/Makefile-Linux so that it now contains
2538 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2540 The two -D definitions ensure that Exim is compiled with large file
2541 support, which makes it possible to handle log files that are bigger than
2544 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2545 instance) a domain was checked against a named list that involved a lookup,
2546 causing $domain_data to be set, then another domain was checked against the
2547 same list, then the first domain was re-checked, the value of $domain_data
2548 after the final check could be wrong. In particular, if the second check
2549 failed, it could be set empty. This bug probably also applied to
2552 41. The strip_trailing_dot option was not being applied to the address given
2553 with the -f command-line option.
2555 42. The code for reading a message's header from the spool was incrementing
2556 $received_count, but never initializing it. This meant that the value was
2557 incorrect (doubled) while delivering a message in the same process in which
2558 it was received. In the most common configuration of Exim, this never
2559 happens - a fresh exec is done - but it can happen when
2560 deliver_drop_privilege is set.
2562 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2563 it now includes up to 150 characters of the unexpected data in the log
2566 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2567 and building data strings. The size of both of these buffers was 10 000
2568 bytes - far larger than anybody would *ever* want, thought I. Needless to
2569 say, somebody hit the limit. I have increased the maximum line length to
2570 20 000 and the maximum data length of concatenated lines to 100 000. I have
2571 also fixed two bugs, because there was no checking on these buffers. Tsk,
2572 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2573 buffer is too small.
2575 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2576 lsearch lookups. Now it does.
2578 46. When parsing a route_list item in a manualroute router, a fixed-length
2579 buffer was used for the list of hosts. I made this 1024 bytes long,
2580 thinking that nobody would ever have a list of hosts that long. Wrong.
2581 Somebody had a whole pile of complicated expansion conditions, and the
2582 string was silently truncated, leading to an expansion error. It turns out
2583 that it is easier to change to an unlimited length (owing to other changes
2584 that have happened since this code was originally written) than to build
2585 structure for giving a limitation error. The length of the item that
2586 expands into the list of hosts is now unlimited.
2588 47. The lsearch lookup could not handle data where the length of text line was
2589 more than 4095 characters. Such lines were truncated, leading to shortened
2590 data being returned. It should now handle lines of any length.
2592 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2593 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2596 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2597 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2598 no longer happens in comment lines. A list of replacements is now placed
2599 at the head of all of the source files, except those whose only change is
2600 to replace PERL_COMMAND in the very first #! line.
2602 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2603 messages on the queue, with a bottom-up merge sort, using code contributed
2604 by Michael Haardt. This should make operations like -bp somewhat faster on
2605 large queues. It won't affect queue runners, except when queue_run_in_order
2608 51. Installed eximstats 1.31 in the distribution.
2610 52. Added support for SRV lookups to the dnslookup router.
2612 53. If an ACL referred to $message_body or $message_body_end, the value was not
2613 reset for any messages that followed in the same SMTP session.
2615 54. The store-handling optimization for building very long strings was not
2616 differentiating between the different store pools. I don't think this
2617 actually made any difference in practice, but I've tidied it.
2619 55. While running the routers to verify a sender address, $sender_address
2620 was still set to the sender address. This is wrong, because when routing to
2621 send a bounce to the sender, it would be empty. Therefore, I have changed
2622 it so that, while verifying a sender address, $sender_address is set to <>.
2623 (There is no change to what happens when verifying a recipient address.)
2625 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2626 target A or AAAA records (if not already returned) without resetting the
2627 qualify_single or search_parents options of the DNS resolver. These are
2628 inappropriate in this case because the targets of MX and SRV records must
2629 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2630 target that, when qualified, matched something in the local domain. These
2631 two options are now turned off when doing these lookups.
2633 57. It seems that at least some releases of Reiserfs (which does not have the
2634 concept of a fixed number of inodes) returns zero and not -1 for the
2635 number of available inodes. This interacted badly with check_spool_inodes,
2636 which assumed that -1 was the "no such thing" setting. What I have done is
2637 to check that the total number of inodes is greater than zero before doing
2638 the test of how many are available.
2640 58. When a "warn" ACL statement has a log_message modifier, the message is
2641 remembered, and not repeated. This is to avoid a lot of repetition when a
2642 message has many recipients that cause the same warning to be written.
2643 Howewer, Exim was preserving the list of already written lines for an
2644 entire SMTP session, which doesn't seem right. The memory is now reset if a
2645 new message is started.
2647 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2648 debugging output unless log_rewrite was also set.
2650 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2651 of (int)(handle) when we know that handle contains (void *)(-1).
2653 61. The Exim daemon panic-logs an error return when it closes the incoming
2654 connection. However "connection reset by peer" seems to be common, and
2655 isn't really an error worthy of noting specially, so that particular error
2658 62. When Exim is trying to find all the local interfaces, it used to panic and
2659 die if the ioctl to get the interface flags failed. However, it seems that
2660 on at least one OS (Solaris 9) it is possible to have an interface that is
2661 included in the list of interfaces, but for which you get a failure error
2662 for this call. This happens when the interface is not "plumbed" into a
2663 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2664 failure of the "get flags" call assumes that the interface is down.
2666 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2667 makes life easier for people who are doing arithmetic on fields extracted
2668 from dates, where you often get leading zeros that should not be
2669 interpreted as octal.
2671 64. Added qualify_domain to the redirect router, to override the global
2674 65. If a pathologically long header line contained very many addresses (the
2675 report of this problem mentioned 10 000) and each of them was rewritten,
2676 Exim could use up a very large amount of memory. (It kept on making new
2677 copies of the header line as it rewrote, and never released the old ones.)
2678 At the expense of a bit more processing, the header rewriting function has
2679 been changed so that it no longer eats memory in this way.
2681 66. The generation of the Received: header has been moved from the time that a
2682 message starts to be received, to the time that it finishes. The timestamp
2683 in the Received: header should now be very close to that of the <= log
2684 line. There are two side-effects of this change:
2686 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2687 logged header lines no longer include the local Received: line, because
2688 it has not yet been created. The same applies to a copy of the message
2689 that is returned to a non-SMTP sender when a message is rejected.
2691 (b) When a filter file is tested using -bf, no additional Received: header
2692 is added to the test message. After some thought, I decided that this
2695 This change does not affect the value of $received_for. It is still set
2696 after address rewriting, but before local_scan() is called.
2698 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2700 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2701 gave an unhelpful panic error message, and a defer error. I have managed to
2702 change this behaviour so that it now rejects any supplied certificate,
2703 which seems right, as the list of acceptable certificates is empty.
2705 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2706 gave an unhelpful defer error. I have not managed to make this reject any
2707 supplied certificates, but the error message it gives is "no certificate
2708 supplied", which is not helpful.
2710 70. exigrep's output now also includes lines that are not associated with any
2711 message, but which match the given pattern. Implemented by a patch from
2712 Martin Sluka, which also tidied up the Perl a bit.
2714 71. Recipient callout verification, like sender verification, was using <> in
2715 the MAIL FROM command. This isn't really the right thing, since the actual
2716 sender may affect whether the remote host accepts the recipient or not. I
2717 have changed it to use the actual sender in the callout; this means that
2718 the cache record is now keyed on a recipient/sender pair, not just the
2719 recipient address. There doesn't seem to be a real danger of callout loops,
2720 since a callout by the remote host to check the sender would use <>.
2721 [SEE ABOVE: changed after hitting problems.]
2723 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2724 temporary errors. However, in the case of such a code being given after
2725 the end of a data transmission (i.e. after ".") Exim was failing to write
2726 a retry record for the message. (Yes, there was some broken host that was
2727 actually sending 8xx at this point.)
2729 73. An unknown lookup type in a host list could cause Exim to panic-die when
2730 the list was checked. (An example that provoked this was putting <; in the
2731 middle of a list instead of at the start.) If this happened during a DATA
2732 ACL check, a -D file could be left lying around. This kind of configuration
2733 error no longer causes Exim to die; instead it causes a defer errror. The
2734 incident is still logged to the main and panic logs.
2736 74. Buglet left over from Exim 3 conversion. The message "too many messages
2737 in one connection" was written to the rejectlog but not the mainlog, except
2738 when address rewriting (yes!) was being logged.
2740 75. Added write_rejectlog option.
2742 76. When a system filter was run not as root (that is, when system_filter_user
2743 was set), the values of the $n variables were not being returned to the
2744 main process; thus, they were not subsequently available in the $sn
2747 77. Added +return_path_on_delivery log selector.
2749 78. A connection timeout was being treated differently from recipients deferred
2750 when testing hosts_max_try with a message that was older than the host's
2751 retry timeout. (The host should not be counted, thus allowing all hosts to
2752 be tried at least once before bouncing.) This may have been the cause of an
2753 occasionally reported bug whereby a message would remain on the queue
2754 longer than the retry timeout, but would be bounced if a delivery was
2755 forced. I say "may" because I never totally pinned down the problem;
2756 setting up timeout/retry tests is difficult. See also the next item.
2758 79. The ultimate address timeout was not being applied to errors that involved
2759 a combination of host plus message (for example, a timeout on a MAIL
2760 command). When an address resolved to a number of possible hosts, and they
2761 were not all tried for each delivery (e.g. because of hosts_max_try), a
2762 message could remain on the queue longer than the retry timeout.
2764 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2767 81. Fixed an obscure SMTP outgoing bug which required at least the following
2768 conditions: (a) there was another message waiting for the same server;
2769 (b) the server returned 5xx to all RCPT commands in the first message so
2770 that the message was not completed; (c) the server dropped the connection
2771 or gave a negative response to the RSET that Exim sends to abort the
2772 transaction. The observed case was a dropped connection after DATA that had
2773 been sent in pipelining mode. That is, the server had advertised PIPELINING
2774 but was not implementing it correctly. The effect of the bug was incorrect
2775 behaviour, such as trying another host, and this could lead to a crash.
2781 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2782 and daemon.c were passed as pointers to ints; they should have been
2783 pointers to socklen_t variables (which are typically unsigned ints).
2785 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2788 3. Fixed a really odd bug that affected only the testing scheme; patching a
2789 certain fixed string in the binary changed the value of another string that
2790 happened to be identical to the end of the original first string.
2792 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2793 name", it returns that address as the IP address. On some operating
2794 systems (e.g. Solaris), it also passes back the IP address string as the
2795 "host name". However, on others (e.g. Linux), it passes back an empty
2796 string. Exim wasn't checking for this, and was changing the host name to an
2797 empty string, assuming it had been canonicized.
2799 5. Although rare, it is permitted to have more than one PTR record for a given
2800 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2801 all the names associated with an address, because they do in Solaris.
2802 However, it seems that they do not in Linux for data that comes from the
2803 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2804 I found this out when I moved to a new Linux workstation and tried to run
2805 the Exim test suite.
2807 To get round this problem I have changed the code so that it now does its
2808 own call to the DNS to look up PTR records when searching for a host name.
2809 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2810 addresses that are only in /etc/hosts are still found.
2812 This behaviour is, however, controlled by an option called host_lookup_
2813 order, which defaults to "bydns:byaddr". If people want to use the other
2814 order, or indeed, just use one or the other means of lookup, they can
2815 specify it in this variable.
2817 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2818 some operating systems, this comes back from gethostbyaddr() as an empty
2819 string, and this is what Exim used to test for. However, it seems that in
2820 other systems, "." is yielded. Exim now tests for this case too.
2822 7. The values of check_spool_space and check_log_space are now held internally
2823 as a number of kilobytes instead of an absolute number of bytes. If a
2824 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2825 kilobyte. This means that much larger values can be stored.
2827 8. Exim monitor: an attempt to get the action menu when not actually pointing
2828 at a message produces an empty menu entitled "No message selected". This
2829 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2830 no entries in it ("Shell widget menu has zero width and/or height"). So I
2831 have added a single, blank menu entry in this case.
2833 9. Added ${quote_local_part.
2835 10. MIME decoding is now applied to the contents of Subject: header lines when
2838 11. Now that a reference to $sender_host_address automatically causes a reverse
2839 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2840 host lookup before query-style lookups in lists that might use this
2841 variable. This has therefore been abolished, and the "net-" prefix is no
2842 longer necessary for query-style lookups.
2844 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2845 have been a typo for LFLAGS, so it has been changed.
2847 13. The install script calls Exim with "-C /dev/null" in order to find the
2848 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2849 to be output. Howeve, since Exim outputs its version number before the
2850 error, it didn't break the script. It just looked ugly. I fixed this by
2851 always allowing "-C /dev/null" if the caller is root.
2853 14. Ignore overlarge ACL variable number when reading spool file - insurance
2854 against a later release with more variables having written the file.
2856 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2857 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2858 this, as well as the form without the "IPv6" on the front.
2860 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2861 OS/Makefile-Darwin file.
2863 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2864 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2866 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2867 variable. However, some OS use ints for inodes. I've added cast to long int
2868 to get rid of the compiler warning.
2870 19. I had forgotten to lock out "/../" in configuration file names when
2871 ALT_CONFIG_PREFIX was set.
2873 20. Routers used for verification do not need to specify transports. However,
2874 if such a router generated a host list, and callout was configured, Exim
2875 crashed, because it could not find a port number from the (non-existent)
2876 transport. It now assumes port 25 in this circumstance.
2878 21. Added the -t option to exigrep.
2880 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2881 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2882 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2883 them is set, LOOKUP_LSEARCH is forced.
2885 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2887 24. Added sender and host information to the "rejected by local_scan()" log
2888 line; previously there was no indication of these.
2890 25. Added .include_if_exists.
2892 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2893 Linux. It turns out that not all file systems support this. Apparently some
2894 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2895 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2896 not supported on the file descriptor, is now ignored when Exim is trying to
2897 sync a directory. This applies only to Linux.
2899 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2901 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2902 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2905 29. Added support for maildirsize files from supplied patch (modified a bit).
2907 30. The use of :fail: followed by an empty string could lead Exim to respond to
2908 sender verification failures with (e.g.):
2910 550 Verification failed for <xxx>
2911 550 Sender verify failed
2913 where the first response line was missing the '-' that indicates it is not
2914 the final line of the response.
2916 31. The loop for finding the name of the user that called Exim had a hardwired
2917 limit of 10; it now uses the value of finduser_retries, which is used for
2918 all other user lookups.
2920 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2923 33. Exim was neglecting to zero errno before one call of strtol() when
2924 expanding a string and expecting an integer value. On some systems this
2925 resulted in spurious "integer overflow" errors. Also, it was casting the
2926 result into an int without checking.
2928 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2929 did not work. The code looks as if it has *never* worked, though it appears
2930 to have been documented since at least releast 1.62. I have made it work.
2932 35. The "timeout_DNS" error in retry rules, also documented since at least
2933 1.62, also never worked. As it isn't clear exactly what this means, and
2934 clearly it isn't a major issue, I have abolished the feature by treating it
2935 as "timeout", and writing a warning to the main and panic logs.
2937 36. The display of retry rules for -brt wasn't always showing the error code
2940 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2941 timeout_connect_A, timeout_connect_MX.
2943 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2944 to the empty sender.
2946 39. The daemon was not analysing the content of -oX till after it had closed
2947 stderr and disconnected from the controlling terminal. This meant that any
2948 syntax errors were only noted on the panic log, and the return code from
2949 the command was 0. By re-arranging the code a little, I've made the
2950 decoding happen first, so such errors now appear on stderr, and the return
2951 code is 1. However, the actual setting up of the sockets still happens in
2952 the disconnected process, so errors there are still only recorded on the
2955 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2956 connections (as happens on some IP stacks) was logged at start up time as
2957 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2958 it from "IPv6 and IPv4", which means that two separate sockets are being
2961 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2962 says whether AF_INET or AF_INET6 was passed as an argument.
2964 42. Exiwhat output was messed up when time zones were included in log
2967 43. Exiwhat now gives more information about the daemon's listening ports,
2968 and whether -tls-on-connect was used.
2970 44. The "port" option of the smtp transport is now expanded.
2972 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2973 silently ignored. Now an error message is written to the main and panic
2976 46. There's a new ACL modifier called "logwrite" which writes to a log file
2977 as soon as it is encountered.
2979 47. Added $local_user_uid and $local_user_gid at routing time.
2981 48. Exim crashed when trying to verify a sender address that was being
2984 49. Exim was recognizing only a space character after ".include". It now also
2985 recognizes a tab character.
2987 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2988 extracting the relevant information from the specification. The man page no
2989 longer contains scrambled data for the -d option, and I've added a section
2990 at the front about calling Exim under different names.
2992 51. Added "extra_headers" argument to the "mail" command in filter files.
2994 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2997 53. Installed eximstats 1.29.
2999 54. Added transport_filter_timeout as a generic transport option.
3001 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3002 Cc: header lines. This was required by RFC 822, but it not required by RFC
3005 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3006 incoming messages that did not have them. Now it does so only if the
3007 message originates locally, that is, if there is no associated remote host
3008 address. When Resent- header lines are present, this applies to the Resent-
3009 lines rather than the non-Resent- lines.
3011 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3012 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3014 58. Messages for configuration errors now include the name of the main
3015 configuration file - useful now that there may be more than one file in a
3016 list (.included file names were always shown).
3018 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3019 for those rare installations that do not start the daemon as root or run it
3020 setuid root. I've cut out the call to initgroups() if the daemon is not
3023 60. The Exim user and group can now be bound into the binary as text strings
3024 that are looked up at the start of Exim's processing.
3026 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3028 62. Added $mailstore_basename variable.
3030 63. Installed patch to sieve.c from Michael Haardt.
3032 64. When Exim failed to open the panic log after failing to open the main log,
3033 the original message it was trying to log was written to stderr and debug
3034 output, but if they were not available (the usual case in production), it
3035 was lost. Now it is written to syslog before the two lines that record the
3036 failures to open the logs.
3038 65. Users' Exim filters run in subprocesses under the user's uid. It is
3039 possible for a "deliver" command or an alias in a "personal" command to
3040 provoke an address rewrite. If logging of address rewriting is configured,
3041 this fails because the process is not running as root or exim. There may be
3042 a better way of dealing with this, but for the moment (because 4.30 needs
3043 to be released), I have disabled address rewrite logging when running a
3044 filter in a non-root, non-exim process.
3050 1. The buildconfig auxiliary program wasn't quoting the value set for
3051 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3052 not defined. This bug was masked in 4.22 by the effect that was fixed in
3055 2. Some messages that were rejected after a message id was allocated were
3056 shown as "incomplete" by exigrep. It no longer does this for messages that
3057 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3059 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3060 have allow_domain_literals set, the ID did not get logged in the <= line.
3061 Domain literals are now always recognized in Message-ID: header lines.
3063 4. The first argument for a ${extract expansion item is the key name or field
3064 number. Leading and trailing spaces in this item were not being ignored,
3065 causing some misleading effects.
3067 5. When deliver_drop_privilege was set, single queue runner processes started
3068 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3069 same command in the process it spins off) were not dropping privilege.
3071 6. When the daemon running as "exim" started a queue runner, it always
3072 re-executed Exim in the spun-off process. This is a waste of effort when
3073 deliver_drop_privilege is set. The new process now just calls the
3074 queue-runner function directly.
3080 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3083 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3084 ignored. Though the use of -oP was forcing the writing of a pid file, it
3085 was always written to the default place.
3087 3. If the message "no IP address found for host xxxx" is generated during
3088 incoming verification, it is now followed by identification of the incoming
3089 connection (so you can more easily find what provoked it).
3091 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3093 5. Added some features to "harden" Exim a bit more against certain attacks:
3095 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3096 be put in Local/Makefile. This is like the never_users runtime option,
3097 but it cannot be overridden. The default setting is "root".
3099 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3100 prefix string with which any file named in a -C command line option
3103 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3104 is retained for -C and -D only if the caller of Exim is root. Without
3105 it, the exim user may also use -C and -D and retain privilege.
3107 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3108 command line option is disabled.
3110 6. Macro names set by the -D option must start with an upper case letter, just
3111 like macro names defined in the configuration file.
3113 7. Added "dereference=" facility to LDAP.
3115 8. Two instances of the typo "uknown" in the source files are fixed.
3117 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3118 the Configure-Makefile script screwed up while processing it.
3120 10. Incorporated PCRE 4.4.
3122 11. The SMTP synchronization check was not operating right at the start of an
3123 SMTP session. For example, it could not catch a HELO sent before the client
3124 waited for the greeting. There is now a check for outstanding input at the
3125 point when the greeting is written. Because of the duplex, asynchronous
3126 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3127 way, but not yet received, when the check is performed.
3129 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3130 on TCP/IP sockets, because this apparently causes some broken clients to
3133 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3134 unchanged) from the Cygwin maintainer.
3136 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3137 was supported instead of testing for mbx. Effectively a typo.
3139 15. The spa authenticator server code was not checking that the input it
3140 received was valid base64.
3142 16. The debug output line for the "set" modifier in ACLs was not showing the
3143 name of the variable that was being set.
3145 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3147 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3148 lookup on its own. Something else was needed to trigger the lookup. For
3149 example, a match in host_lookup or the need for a host name in a host list.
3150 Now, if $sender_host_name is referenced and the host name has not yet been
3151 looked up, a lookup is performed. If the lookup fails, the variable remains
3152 empty, and $host_lookup_failed is set to "1".
3154 19. Added "eqi" as a case-independent comparison operator.
3156 20. The saslauthd authentication condition could segfault if neither service
3157 nor realm was specified.
3159 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3160 error message that was logged was misleading, and incoming SMTP
3161 connections were dropped. The message is now more accurate, and temporary
3162 errors are given to SMTP connections.
3164 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3165 (except RSET) with a 421 error, until QUIT is received. However, it was
3166 failing to send a response to QUIT.
3168 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3169 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3170 ACL is now run after the helo_try_verify_hosts code.
3172 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3173 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3174 case-independent, so other case variants are also recognized). Apparently
3175 some systems use these upper case variants.
3177 25. If more than two messages were waiting for the same host, and a transport
3178 filter was specified for the transport, Exim sent two messages over the
3179 same TCP/IP connection, and then failed with "socket operation on non-
3180 socket" when it tried to send the third.
3182 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3184 27. The extern definition of crypt16() in expand.c was not being excluded when
3185 the OS had its own crypt16() function.
3187 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3188 as a preferred synonym for return_size_limit, both as an option and as an
3191 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3193 30. Changed the default configuration ACL to relax the local part checking rule
3194 for addresses that are not in any local domains. For these addresses,
3195 slashes and pipe symbols are allowed within local parts, but the sequence
3196 /../ is explicitly forbidden.
3198 31. SPA server authentication was not clearing the challenge buffer before
3201 32. log_message in a "warn" ACL statement was writing to the reject log as
3202 well as to the main log, which contradicts the documentation and doesn't
3203 seem right (because no rejection is happening). So I have stopped it.
3205 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3206 However, I am unable to do any testing of this.
3208 34. Fixed an infelicity in the appendfile transport. When checking directories
3209 for a mailbox, to see if any needed to be created, it was accidentally
3210 using path names with one or more superfluous leading slashes; tracing
3211 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3213 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3214 contents are added to the log line that is written for every discarded
3215 recipient. (Previously a log_message setting was ignored.)
3217 36. The ${quote: operator now quotes the string if it is empty.
3219 37. The install script runs exim in order to find its version number. If for
3220 some reason other than non-existence or emptiness, which it checks, it
3221 could not run './exim', it was installing it with an empty version number,
3222 i.e. as "exim-". This error state is now caught, and the installation is
3225 38. An argument was missing from the function that creates an error message
3226 when Exim fails to connect to the socket for saslauthd authentication.
3227 This could cause Exim to crash, or give a corrupted message.
3229 39. Added isip, isip4, and isip6 to ${if conditions.
3231 40. The ACL variables $acl_xx are now saved with the message, and can be
3232 accessed later in routers, transports, and filters.
3234 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3235 strings in the file are not string-expanded.
3237 42. If a MAIL command specified a SIZE value that was too large to fit into an
3238 int variable, the check against message_size_limit failed. Such values are
3239 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3240 day this will have to be increased, but I don't think I want to be around
3241 when emails are that large.
3248 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3249 iconv() is not standard in FreeBSD.
3251 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3252 IPv6 enabled. The observed symptom was a segmentation fault on return from
3253 the function os_common_find_running_interfaces() in src/os.c.
3255 3. In the check_special_case() function in daemon.c I had used "errno" as an
3256 argument name, which causes warnings on some systems. This was basically a
3257 typo, since it was named "eno" in the comments!
3259 4. The code that waits for the clock to tick (at a resolution of some fraction
3260 of a second) so as to ensure message-id uniqueness was always waiting for
3261 at least one whole tick, when it could have waited for less. [This is
3262 almost certainly not relevant at current processor speeds, where it is
3263 unlikely to ever wait at all. But we try to future-proof.]
3265 5. The function that sleeps for a time interval that includes fractions of a
3266 second contained a race. It did not block SIGALRM between setting the
3267 timer, and suspending (a couple of lines later). If the interval was short
3268 and the sigsuspend() was delayed until after it had expired, the suspension
3269 never ended. On busy systems this could lead to processes getting stuck for
3272 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3273 process, before it forks any delivery processes. The open lookup caching
3274 mechanism meant that the open file or database connection was passed into
3275 the delivery process. The problem was that delivery processes always tidy
3276 up cached lookup data. This could cause a problem for the next delivery
3277 process started by the queue runner, because the external queue runner
3278 process does not know about the closure. So the next delivery process
3279 still has data in the lookup cache. In the case of a file lookup, there was
3280 no problem because closing a file descriptor in a subprocess doesn't affect
3281 the parent. However, if the lookup was caching a connection to a database,
3282 the connection was closed, and the second delivery process was likely to
3283 see errors such as "PGSQL: query failed: server closed the connection
3284 unexpectedly". The problem has been fixed by closing all cached lookups
3285 in a queue runner before running a delivery process.
3287 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3288 seem to have the "const" qualifier which it has on other OS. I've
3291 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3292 *of the same type* (client or server) with the same public name that an
3293 error should be diagnosed.
3295 9. When Exim looked up a host name for an IP address, but failed to find the
3296 original IP address when looking up the host name (a safety check), it
3297 output the message "<ip address> does not match any IP for NULL", which was
3298 confusing, to say the least. The bug was that the host name should have
3299 appeared instead of "NULL".
3301 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3302 user that is built into the binary, and the -C or -D options is used, root
3303 privilege is dropped before the configuration file is read. In addition,
3304 logging is switched to stderr instead of the normal log files. If the
3305 configuration then re-defines the Exim user, the unprivileged environment
3306 is probably not what is expected, so Exim logs a panic warning message (but
3309 However, if deliver_drop_privilege is set, the unprivileged state may well
3310 be exactly what is intended, so the warning has been cut out in that case,
3311 and Exim is allowed to try to write to its normal log files.
3317 1. smtp_return_error_details was not giving details for temporary sender
3318 or receiver verification errors.
3320 2. Diagnose a configuration error if two authenticators have the same public
3323 3. Exim used not to create the message log file for a message until the first
3324 delivery attempt. This could be confusing when incoming messages were held
3325 for policy or load reasons. The message log file is now created at the time
3326 the message is received, and an initial "Received" line is written to it.
3328 4. The automatically generated man page for command line options had a minor
3329 bug that caused no ill effects; however, a more serious problem was that
3330 the procedure for building the man page automatically didn't always
3331 operate. Consequently, release 4.20 contains an out-of-date version. This
3332 shouldn't happen again.
3334 5. When building Exim with embedded Perl support, the script that builds the
3335 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3336 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3338 6. The freeze_tell option was not being used for messages that were frozen on
3339 arrival, either by an ACL or by local_scan().
3341 7. Added the smtp_incomplete_transaction log selector.
3343 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3344 was accepting AUTH without a new EHLO.
3346 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3347 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3350 10. Logging of TCP/IP connections (when configured) now happens in the main
3351 daemon process instead of the child process, so that the TCP/IP connection
3352 count is more accurate (but it can never be perfect).
3354 11. The use of "drop" in a nested ACL was not being handled correctly in the
3355 outer ACL. Now, if condition failure induced by the nested "drop" causes
3356 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3357 or "require"), the connection is dropped.
3359 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3360 that yield "discard" can now be used with an "accept" or a "discard" verb,
3361 but an error is generated for any others (because I can't see a useful way
3362 to define what should happen).
3364 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3365 are now processed in the same way as lines in the Exim configuration file.
3366 In particular, continuation lines are supported.
3368 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3370 15. Added -ti meaning -t -i.
3372 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3373 domains, and warn by logging if others are found.
3375 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3376 returned from GIFCONF when Exim is trying to find the list of interfaces on
3377 a host. The code in os.c has been modified to copy each ifreq to an aligned
3378 structure in all cases.
3380 Also, in some cases, the returned ifreq's were being copied to a 'struct
3381 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3382 means the last couple of bytes of an IPv6 address could be chopped if the
3383 ifreq contained only a normal sockaddr (14 bytes storage).
3385 18. Named domain lists were not supported in the hosts_treat_as_local option.
3386 An entry such as +xxxx was not recognized, and was treated as a literal
3389 19. Ensure that header lines added by a DATA ACL are included in the reject log
3390 if the ACL subsequently rejects the message.
3392 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3393 MD5 (which is deprecated).
3395 21. When testing a filter file using -bf, Exim was writing a message when it
3396 took the sender from a "From " line in the message, but it was not doing so
3397 when it took $return_path from a Return-Path: header line. It now does.
3399 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3400 with a valid header line field name (a series of printing characters
3401 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3403 23. Changed "disc" in the source to "disk" to conform to the documentation and
3404 the book and for uniformity.
3406 24. Ignore Sendmail's -Ooption=value command line item.
3408 25. When execve() failed while trying to run a command in a pipe transport,
3409 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3410 could be confused with a return value of 69 from the command itself. This
3411 has been changed to 127, the value the shell returns if it is asked to run
3412 a non-existent command. The wording for the related log line suggests a
3413 non-existent command as the problem.
3415 26. If received_header_text expands to an empty string, do not add a Received:
3416 header line to the message. (Well, it adds a token one on the spool, but
3417 marks it "old" so that it doesn't get used or transmitted.)
3419 27. Installed eximstats 1.28 (addition of -nt option).
3421 28. There was no check for failure on the call to getsockname() in the daemon
3422 code. This can fail if there is a shortage of resources on the system, with
3423 ENOMEM, for example. A temporary error is now given on failure.
3425 29. Contrary to the C standard, it seems that in some environments, the
3426 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3427 program. Exim now does this explicitly; it affects the formatting of
3428 timestamps using strftime().
3430 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3431 complaints. I've now initialized all the variables, to avoid this.
3433 32. Header lines added by a system filter were not being "seen" during
3434 transport-time rewrites.
3436 33. The info_callback() function passed to OpenSSL is set up with type void
3437 (*)(SSL *, int, int), as described somewhere. However, when calling the
3438 function (actually a macro) that sets it up, the type void(*)() is
3439 expected. I've put in a cast to prevent warnings from picky compilers.
3441 34. If a DNS black list lookup found a CNAME record, but there were no A
3442 records associated with the domain it pointed at, Exim crashed.
3444 35. If a DNS black list lookup returned more than one A record, Exim ignored
3445 all but the first. It now scans all returned addresses if a particular IP
3446 value is being sought. In this situation, the contents of the
3447 $dnslist_value variable are a list of all the addresses, separated by a
3450 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3451 to accept a host name and all its aliases if the forward lookup for any of
3452 them yielded the IP address of the incoming connection. Now it accepts only
3453 those names whose forward lookup yields the correct IP address. Any other
3454 names are discarded. This closes a loophole whereby a rogue DNS
3455 administrator could create reverse DNS records to break through a
3456 wildcarded host restriction in an ACL.
3458 37. If a user filter or a system filter that ran in a subprocess used any of
3459 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3460 the wrong values were passed to the pipe command ($thisaddress had the
3461 value of $0, $0 had the value of $1, etc). This bug was introduced by
3462 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3464 38. Improved the line breaking for long SMTP error messages from ACLs.
3465 Previously, if there was no break point between 40 and 75 characters, Exim
3466 left the rest of the message alone. Two changes have been made: (a) I've
3467 reduced the minimum length to 35 characters; (b) if it can't find a break
3468 point between 35 and 75 characters, it looks ahead and uses the first one
3469 that it finds. This may give the occasional overlong line, but at least the
3470 remaining text gets split now.
3472 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3473 file descriptors might be low, and that setting 1000 would always raise it.
3474 It turns out that in some environments, the limit is already over 1000 and
3475 that lowering it causes trouble. So now Exim takes care not to decrease it.
3477 40. When delivering a message, the value of $return_path is set to $sender_
3478 address at the start of routing (routers may change the value). By an
3479 oversight, this default was not being set up when an address was tested by
3480 -bt or -bv, which affected the outcome if any router or filter referred to
3483 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3484 log only when "message" or "log_message" are set. However, if one of the
3485 conditions was an address verification, or a call to a nested ACL, the
3486 messages generated by the underlying test were being passed through. This
3487 no longer happens. The underlying message is available in $acl_verify_
3488 message for both "message" and "log_message" expansions, so it can be
3489 passed through if needed.
3491 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3492 new expansion $bh_ to give the encoded byte string without charset
3493 translation. Translation happens only if iconv() is available; HAVE_ICONV
3494 indicates this at build time. HEADERS_CHARSET gives the charset to
3495 translate to; headers_charset can change it in the configuration, and
3496 "headers charset" can change it in an individual filter file.
3498 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3499 that creates RFC 2047 encoded "words" labels them as that charset instead
3500 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3501 expansion operator; (ii) when Exim creates a From: line for a local
3502 message; (iii) when a header line is rewritten to include a "phrase" part.
3504 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3505 buggy, causing it to skip the first lines of messages whose message ID
3506 ended in 'D'. This would not have bitten before Exim release 4.14, because
3507 message IDs were unlikely to end in 'D' before then. The effect was to have
3508 incorrect size information for certain domains.
3510 45. #include "config.h" was missing at the start of the crypt16.c module. This
3511 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3514 46. If there was a timeout during a "random" callout check, Exim treated it as
3515 a failure of the random address, and carried on sending RSET and the real
3516 address. If the delay was just some slowness somewhere, the response to the
3517 original RCPT would be taken as a response to RSET and so on, causing
3518 mayhem of various kinds.
3520 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3521 when I implemented it. It didn't allow for the fact that some option values
3522 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3523 the right test for positive values.
3525 48. Domain names in DNS records are case-independent. Exim always looks them up
3526 in lower case. Some resolvers return domain names in exactly the case they
3527 appear in the zone file, that is, they may contain uppercase letters. Not
3528 all resolvers do this - some return always lower case. Exim was treating a
3529 change of case by a resolver as a change of domain, similar to a widening
3530 of a domain abbreviation. This triggered its re-routing code and so it was
3531 trying to route what was effectively the same domain again. This normally
3532 caused routing to fail (because the router wouldn't handle the domain
3533 twice). Now Exim checks for this case specially, and just changes the
3534 casing of the domain that it ultimately uses when it transmits the message
3537 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3540 50. If a filter generated a file delivery with a non-absolute name (possible if
3541 no home directory exists for the router), the forbid_file option was not
3544 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3545 the existing equality matching.
3547 52. Exim was using ints instead of ino_t variables in some places where it was
3548 dealing with inode numbers.
3550 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3551 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3552 called TMPDIR, and if it finds it is different, it changes its value.
3554 54. The smtp_printf() function is now made available to local_scan() so
3555 additional output lines can be written before returning. There is also an
3556 smtp_fflush() function to enable the detection of a dropped connection.
3557 The variables smtp_input and smtp_batched_input are exported to
3560 55. Changed the default runtime configuration: the message "Unknown user"
3561 has been removed from the ACL, and instead placed on the localuser router,
3562 using the cannot_route_message feature. This means that any verification
3563 failures that generate their own messages won't get overridden. Similarly,
3564 the "Unrouteable address" message that was in the ACL for unverifiable
3565 relay addresses has also been removed.
3567 56. Added hosts_avoid_esmtp to the smtp transport.
3569 57. The exicyclog script was not checking for the esoteric option
3570 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3571 will work only if exicyclog is run under the appropriate euid.
3573 58. Following a discussion on the list, the rules by which Exim recognises line
3574 endings on incoming messages have been changed. The -dropcr and drop_cr
3575 options are now no-ops, retained only for backwards compatibility. The
3576 following line terminators are recognized: LF CRLF CR. However, special
3577 processing applies to CR:
3579 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3580 nor a local message in the state where . is a terminator.
3582 (ii) If a bare CR is encountered in a header line, an extra space is added
3583 after the line terminator so as not to end the header. The reasoning
3584 behind this is that bare CRs in header lines are most likely either
3585 to be mistakes, or people trying to play silly games.
3587 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3588 was being incorrectly given as 18 bytes larger than it should have been.
3589 This is a VOB (very old bug).
3591 60. This may never have affected anything current, but just in case it has:
3592 When the local host is found other than at the start of a list of hosts,
3593 the local host, those with the same MX, and any that follow, are discarded.
3594 When the list in question was part of a longer list of hosts, the following
3595 hosts (not currently being processed) were also being discarded. This no
3596 longer happens. I'm not sure if this situation could ever has previously
3599 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3602 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3603 header. This is something that is recommended in a new Internet Draft, and
3604 is something that is documented as being done by Sendmail. There are two
3605 possible values. For messages generated by the autoreply transport, Exim
3608 Auto-Submitted: auto-replied
3610 whereas for all other generated messages (e.g. bounces) it adds
3612 Auto-Submitted: auto-generated
3614 63. The "personal" condition in filters now includes a test for the
3615 Auto-Submitted: header. If it contains the string "auto-" the message it
3616 not considered personal.
3618 64. Added rcpt_include_affixes as a generic transport option.
3620 65. Added queue_only_override (default true).
3622 66. Added the syslog_duplication option.
3624 67. If what should have been the first header line of a message consisted of
3625 a space followed by a colon, Exim was mis-interpreting it as a header line.
3626 It isn't of course - it is syntactically invalid and should therefore be
3627 treated as the start of the message body. The misbehaviour could have
3628 caused a number of strange effects, including loss of data in subsequent
3629 header lines, and spool format errors.
3631 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3632 client host had authenticated. This control can now be exercised by an ACL
3633 for more flexibility.
3635 69. By default, callouts do not happen when testing with -bh. There is now a
3636 variant, -bhc, which does actually run the callout code, including
3637 consulting and updating the callout cache.
3639 70. Added support for saslauthd authentication, courtesy of Alexander
3642 71. If statvfs() failed on the spool or log directories while checking their
3643 size for availability, Exim confusingly gave the error "space shortage".
3644 Furthermore, in debugging mode it crashed with a floating point exception.
3645 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3646 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3647 serious problem, Exim now writes to the main and panic logs when this
3648 happens, with details of the failure. It then refuses to accept the
3649 incoming message, giving the message "spool directory problem" or "log
3650 directory problem" with a 421 code for SMTP messages.
3652 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3653 0, 1, and 2 exist, because some OS complain for execs without them (see
3654 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3655 descriptors. However, the code omitted to check that the open succeeded,
3656 causing mysterious errors if for some reason the permissions on /dev/null
3657 got screwed. Now Exim writes a message to the main and panic logs, and
3658 bombs out if it can't open /dev/null.
3660 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3661 interact so that it is all more flexible. It is supposed to remain
3662 backwards compatible. Also added extra_local_interfaces.
3664 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3665 to bomb out with an assertion failure - to the client this appears as a
3666 connection drop. This problem occurs in the part of the code that was taken
3667 from the Samba project. Fortunately, the assertion is in a very simple
3668 function, so I have fixed this by reproducing the function inline in the
3669 one place where it is called, and arranging for authentication to fail
3670 instead of killing the process with assert().
3672 75. The SPA client code was not working when the server requested OEM rather
3673 than Unicode encoding.
3675 76. Added code to make require_files with a specific uid setting more usable in
3676 the case where statting the file as root fails - usually a non-root-mounted
3677 NFS file system. When this happens and the failure is EACCES, Exim now
3678 forks a subprocess and does the per-uid checking as the relevant uid.
3680 77. Added process_log_path.
3682 78. If log_file_path was not explicitly set, a setting of check_log_space or
3683 check_log_inodes was ignored.
3685 79. If a space check for the spool or log partitions fails, the incident is now
3686 logged. Of course, in the latter case the data may get lost...
3688 80. Added the %p formatting code to string_format() so that it can be used to
3689 print addresses in debug_print(). Adjusted all the address printing in the
3690 debugging in store.c to use %p rather than %d.
3692 81. There was a concern that a line of code in smtp_in.c could overflow a
3693 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3694 initially expressed, the concern was not well-founded, because trailing
3695 spaces are removed early. However, if the trailing spaces were followed by
3696 a NULL, they did not get removed, so the overflow was possible. Two fixes
3699 (a) I re-wrote the offending code in a cleaner fashion.
3700 (b) If an incoming SMTP command contains a NULL character, it is rejected
3703 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3704 runs initgroups(), so that if the Exim user is in any additional groups,
3705 they will be used during message reception.
3711 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob