1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.357 2006/06/27 13:39:01 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 SC/01 Use a glob alias rather than an array ref in eximstats generated
10 parser. This improves both readability and performance.
12 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
13 Don't display local sender or destination tables in eximstats unless
14 there is data to show.
15 Added average volumes into the eximstats top table text output.
17 SC/03 Collect data on the number of addresses (recipients) as well
18 as the number of messages in eximstats.
20 TF/01 Correct an error in the documentation for the redirect router. Exim
21 does (usually) call initgroups() when daemonizing.
23 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs with
24 consistent privilege compared to when running as a daemon.
26 TF/03 Note in the spec that $authenticated_id is not set for local
27 submissions from trusted users.
29 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
30 Thanks to Dean Brooks <dean@iglou.com> for the patch.
32 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
33 by adding some example configuration directives to the default
34 configuration file. A little bit of work is required to uncomment the
35 directives and define how usernames and passwords are checked, but
36 there is now a framework to start from.
38 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
39 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
40 without this. I don't know how relevant this is to other LDAP libraries.
46 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
47 other effects) broke the use of negated acl sub-conditions.
49 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
52 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
53 "Deny" causes Exim to reject the incoming connection with a 554 error.
54 Unfortunately, if there is a major crisis, such as a disk failure,
55 tcp-wrappers gives "deny", whereas what one would like would be some
56 kind of temporary error. A kludge has been added to help with this.
57 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
58 554 error is used if errno is still zero or contains ENOENT (which occurs
59 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
62 PH/03 Add -lutil to the default FreeBSD LIBS setting.
64 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
65 errors. Otherwise a message that provokes a temporary error (when other
66 messages do not) can cause a whole host to time out.
68 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
69 addresses were routed directly to files or pipes from a redirect router.
70 File deliveries just didn't batch; pipe deliveries might have suffered
73 PH/06 A failure to get a lock for a hints database would erroneously always say
74 "Failed to get write lock", even when it was really a read lock.
76 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
77 of 0600. This has been changed to use the value of the lockfile_mode
78 option (which defaults to 0600).
80 PH/08 Applied small patch from the Sieve maintainer.
82 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
83 folder from quota calculations, a direct delivery into this folder messed
84 up the contents of the maildirsize file. This was because the regex was
85 used only to exclude .Trash (or whatever) when the size of the mailbox
86 was calculated. There was no check that a delivery was happening into an
87 excluded directory. This bug has been fixed by ignoring all quota
88 processing for deliveries into excluded directories.
90 PH/10 Added the maildirfolder_create_regex option to appendfile.
96 PH/01 The code for finding all the local interface addresses on a FreeBSD
97 system running IPv6 was broken. This may well have applied to all BSD
98 systems, as well as to others that have similar system calls. The broken
99 code found IPv4 interfaces correctly, but gave incorrect values for the
100 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
101 that it would not match correctly against @[] and not recognize the IPv6
104 PH/02 The ipliteral router was not recognizing addresses of the form user@
105 [ipv6:....] because it didn't know about the "ipv6:" prefix.
107 PH/03 Added disable_ipv6.
109 PH/04 Changed $reply_address to use the raw form of the headers instead of the
110 decoded form, because it is most often used to construct To: headers
111 lines in autoreplies, and the decoded form may well be syntactically
112 invalid. However, $reply_address has leading white space removed, and all
113 newlines turned into spaces so that the autoreply transport does not
116 PH/05 If group was specified without a user on a router, and no group or user
117 was specified on a transport, the group from the router was ignored.
119 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
120 for visible compile-time settings that can be used to change these
121 numbers, for those that want even more. Backwards compatibility with old
122 spool files has been maintained. However, going back to a previous Exim
123 release will lost any variables that are in spool files.
125 PH/07 Two small changes when running in the test harness: increase delay when
126 passing a TCP/IP connection to a new process, in case the original
127 process has to generate a bounce, and remove special handling of
128 127.0.0.2 (sic), which is no longer necessary.
130 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
131 be the same on different OS.
133 PH/09 Moved a debug statement in filter processing to avoid a race problem when
136 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
137 whether --show-vars was specified or not
139 JJ/02 exipick: Added support for new ACL variable spool format introduced
142 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
143 syntactically invalid From: or Reply-to: line, and a filter used this to
144 generate an autoreply, and therefore failed to obtain an address for the
145 autoreply, Exim could try to deliver to a non-existent relative file
146 name, causing unrelated and misleading errors. What now happens is that
147 it logs this as a hard delivery error, but does not attempt to create a
150 PH/11 The exinext utility has a -C option for testing purposes, but although
151 the given file was scanned by exinext itself; it wasn't being passed on
152 when Exim was called.
154 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
155 an end-of-file indication when reading a command response.
157 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
158 compiled. In many other places in Exim, IPv6 addresses are always
159 recognized, so I have changed this. It also means that IPv4 domain
160 literals of the form [IPV4:n.n.n.n] are now always recognized.
162 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
163 used if the router is not running as root, for example, when verifying at
164 ACL time, or when using -bh. The debugging output from this situation was
165 non-existent - all you got was a failure to exec. I have made two
168 (a) Failures to set uid/gid, the current directory, or a process leader
169 in a subprocess such as that created by queryprogram now generate
170 suitable debugging ouput when -d is set.
172 (b) The queryprogram router detects when it is not running as root,
173 outputs suitable debugging information if -d is set, and then runs
174 the subprocess without attempting to change uid/gid.
176 PH/15 Minor change to Makefile for building test_host (undocumented testing
179 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
180 additional section of a DNS packet that returns MX or SRV records.
181 Instead, it always explicitly searches for A/AAAA records. This avoids
182 major problems that occur when a DNS server includes only records of one
183 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
184 fixed another bug: if SRV records were looked up and the corresponding
185 address records were *not* found in the additional section, the port
186 values from the SRV records were lost.
188 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
189 using the correct key (the original address) when searching the retry
190 rules in order to find which one to use for generating the retry hint.
192 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
193 adding the default one. Similarly, if it contains a Reply-To: header, the
194 errors_reply_to option, if set, is not used.
196 PH/19 When calculating a retry time, Exim used to measure the "time since
197 failure" by looking at the "first failed" field in the retry record. Now
198 it does not use this if it is later than than the arrival time of the
199 message. Instead it uses the arrival time. This makes for better
200 behaviour in cases where some deliveries succeed, thus re-setting the
201 "first failed" field. An example is a quota failure for a huge message
202 when small messages continue to be delivered. Without this change, the
203 "time since failure" will always be short, possible causing more frequent
204 delivery attempts for the huge message than are intended.
205 [Note: This change was subsequently modified - see PH/04 for 4.62.]
207 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
208 $1, $2, $3) because the numerical variables can be reset during some
209 expansion items (e.g. "match"), thereby losing the authentication data.
211 PH/21 Make -bV show the size of off_t variables so that the test suite can
212 decide whether to run tests for quotas > 2G.
214 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
215 mailbox_size, and mailbox_filecount in the appendfile transport. If a
216 filecount value is greater than 2G or if a quota value is greater than 2G
217 on a system where the size of off_t is not greater than 4, a panic error
220 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
221 never match. The debug and -bh output now contains an explicit error
222 message indicating a malformed IPv4 address or mask.
224 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
225 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
228 PH/25 Do not write to syslog when running in the test harness. The only
229 occasion when this arises is a failure to open the main or panic logs
230 (for which there is an explicit test).
232 PH/26 Added the /no_tell option to "control=freeze".
234 PH/27 If a host name lookup failed very early in a connection, for example, if
235 the IP address matched host_lookup and the reverse lookup yielded a name
236 that did not have a forward lookup, an error message of the form "no IP
237 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
238 could be logged. Now it outputs the IP address instead of "NULL".
240 PH/28 An enabling patch from MH: add new function child_open_exim2() which
241 allows the sender and the authenticated sender to be set when
242 submitting a message from within Exim. Since child_open_exim() is
243 documented for local_scan(), the new function should be too.
245 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
246 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
247 results in an empty string is now treated as unset.
249 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
251 PH/31 Added sender_verify_fail logging option.
253 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
254 needed by RFC 822 but not by RFC 2822 was commented out. I have now
255 tidied the source and removed it altogether.
257 PH/33 When a queue run was abandoned because the load average was too high, a
258 log line was always written; now it is written only if the queue_run log
259 selector is set. In addition, the log line for abandonment now contains
260 information about the queue run such as the pid. This is always present
261 in "start" and "stop" lines but was omitted from the "abandon" line.
263 PH/34 Omit spaces between a header name and the colon in the error message that
264 is given when verify = headers_syntax fails (if there are lots of them,
265 the message gets confusing).
267 PH/35 Change the default for dns_check_names_pattern to allow slashes within
268 names, as there are now some PTR records that contain slashes. This check
269 is only to protect against broken name servers that fall over on strange
270 characters, so the fact that it applies to all lookups doesn't matter.
272 PH/36 Now that the new test suite is complete, we can remove some of the
273 special code in Exim that was needed for the old test suite. For example,
274 sorting DNS records because real resolvers return them in an arbitrary
275 order. The new test suite's fake resolver always returns records in the
278 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
279 bounces) except when queue_only is set, to avoid logging races between
280 the different processes.
282 PH/38 Panic-die if .include specifies a non-absolute path.
284 PH/39 A tweak to the "H" retry rule from its user.
286 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
287 a label. They prevented compilation on older perls.
289 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
290 a warning to be raised on newish perls.
292 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
293 on queue. Changes to match documented behaviour of showing count of
294 messages matching specified criteria.
296 PH/40 Changed the default ident timeout from 30s to 5s.
298 PH/41 Added support for the use of login_cap features, on those BSD systems
299 that have them, for controlling the resources used by pipe deliveries.
301 PH/42 The content-scanning code uses fopen() to create files in which to put
302 message data. Previously it was not paying any attention to the mode of
303 the files. Exim runs with umask(0) because the rest of the code creates
304 files with open(), and sets the required mode explicitly. Thus, these
305 files were ending up world-writeable. This was not a big issue, because,
306 being within the spool directory, they were not world-accessible. I have
307 created a function called modefopen, which takes an additional mode
308 argument. It sets umask(777), creates the file, chmods it to the required
309 mode, then resets the umask. All the relevant calls to fopen() in the
310 content scanning code have been changed to use this function.
312 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
313 to 24 hours. This avoids potential overflow problems when processing G
314 and H retry rules. I suspect nobody ever tinkers with this value.
316 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
318 PH/45 When the plaintext authenticator is running as a client, the server's
319 challenges are checked to ensure they are valid base64 strings. By
320 default, the authentication attempt is cancelled if an invalid string is
321 received. Setting client_ignore_invalid_base64 true ignores these errors.
322 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
323 they are received. Thus, the responses can be made to depend on the
324 challenges. If an invalid string is ignored, an empty string is placed in
327 PH/46 Messages that are created by the autoreply transport now contains a
328 References: header, in accordance with RFCs 2822 and 3834.
330 PH/47 Added authenticated_sender_force to the smtp transport.
332 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
334 PH/49 Installed latest patch from the Sieve maintainer.
336 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
337 was also set, the appendfile transport was unnecessarily scanning a
338 directory of message files (e.g. for maildir delivery) to find the count
339 of files (along with the size), even though it did not need this
340 information. It now does the scan only if it needs to find either the
341 size of the count of files.
343 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
345 PH/52 Two bugs concerned with error handling when the smtp transport is
348 (i) Exim was not creating retry information for temporary errors given
349 for individual recipients after the DATA command when the smtp transport
350 was used in LMTP mode. This meant that they could be retried too
351 frequently, and not timed out correctly.
353 (ii) Exim was setting the flag that allows error details to be returned
354 for LMTP errors on RCPT commands, but not for LMTP errors for individual
355 recipients that were returned after the DATA command.
357 PH/53 This is related to PH/52, but is more general: for any failing address,
358 when detailed error information was permitted to be returned to the
359 sender, but the error was temporary, then after the final timeout, only
360 "retry timeout exceeded" was returned. Now it returns the full error as
361 well as "retry timeout exceeded".
363 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
364 do this, and (what is worse) MTAs that accept it.
366 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
367 will now be deprecated.
369 PH/56 New os.c-cygwin from the Cygwin maintainer.
371 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
372 formats (previously only available in exim formats via -bpr, -bpru,
373 and -bpra. Now also available in native and exiqgrep formats)
375 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
376 with very large, slow to parse queues
378 JJ/08 exipick: added ! as generic prefix to negate any criteria format
380 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
382 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
383 responses to authentication challenges, though it was showing the
384 challenges; (ii) I've removed the CR characters from the debug output for
387 PH/58 Allow for the insertion of a newline as well as a space when a string
388 is turned into more than one encoded-word during RFC 2047 encoding. The
389 Sieve code now uses this.
391 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
392 data_4xx, lost_connection, tls_required.
394 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
395 message was being sent as an SMTP response.
397 PH/61 Add -l and -k options to exicyclog.
399 PH/62 When verifying, if an address was redirected to one new address, so that
400 verification continued, and the new address failed or deferred after
401 having set something in $address_data, the value of $address_data was not
402 passed back to the ACL. This was different to the case when no
403 redirection occurred. The value is now passed back in both cases.
405 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
406 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
407 use login_cap.h, so on its own it isn't the distinguishing feature. The
408 new name refers directly to the setclassresources() function.
410 PH/65 Added configuration files for NetBSD3.
412 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
414 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
415 is preferred over IPv4.
417 PH/68 The bounce_return_message and bounce_return_body options were not being
418 honoured for bounces generated during the reception of non-SMTP messages.
419 In particular, this applied to messages rejected by the ACL. This bug has
420 been fixed. However, if bounce_return_message is true and bounce_return_
421 body is false, the headers that are returned for a non-SMTP message
422 include only those that have been read before the error was detected.
423 (In the case of an ACL rejection, they have all been read.)
425 PH/69 The HTML version of the specification is now built in a directory called
426 spec_html instead of spec.html, because the latter looks like a path with
427 a MIME-type, and this confuses some software.
429 PH/70 Catch two compiler warnings in sieve.c.
431 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
432 function verify_get_ident() calls ip_connect() to connect a socket, but
433 if the "connect()" function timed out, ip_connect() used to close the
434 socket. However, verify_get_ident() also closes the socket later, and in
435 between Exim writes to the log, which may get opened at this point. When
436 the socket was closed in ip_connect(), the log could get the same file
437 descriptor number as the socket. This naturally causes chaos. The fix is
438 not to close the socket in ip_connect(); the socket should be closed by
439 the function that creates it. There was only one place in the code where
440 this was missing, in the iplookup router, which I don't think anybody now
441 uses, but I've fixed it anyway.
443 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
444 well as to direct DNS lookups. Otherwise the handling of names in host
445 lists is inconsistent and therefore confusing.
451 PH/01 Two changes to the default runtime configuration:
453 (1) Move the checks for relay_from_hosts and authenticated clients from
454 after to before the (commented out) DNS black list checks.
456 (2) Add control=submission to the relay_from_hosts and authenticated
457 clients checks, on the grounds that messages accepted by these
458 statements are most likely to be submissions.
460 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
462 (1) Generate an error if the third argument for the ${prvs expansion is
465 (2) Treat a missing third argument of ${prvscheck as if it were an empty
468 (3) Reset the variables that are obtained from the first argument of
469 ${prvscheck and used in the second argument before leaving the code,
470 because their memory is reclaimed, so using them afterwards may do
473 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
474 one (it's much easier than Tom thought :-).
476 (5) Because of (4), we can now allow for the use of $prvscheck_result
477 inside the third argument.
479 PH/03 For some reason, the default setting of PATH when running a command from
480 a pipe transport was just "/usr/bin". I have changed it to
483 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
484 anything to be listed in the output from -bV.
486 PH/05 When a filter generated an autoreply, the entire To: header line was
487 quoted in the delivery log line, like this:
489 => >A.N.Other <ano@some.domain> <original@ddress> ...
491 This has been changed so that it extracts the operative address. There
492 may be more than one such address. If so, they are comma-separated, like
495 => >ano@some.domain,ona@other.domain <original@ddress> ...
497 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
498 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
499 not being looked up in the rDNS to get a host name, Exim was showing the
500 IP address twice in Received: lines, even though the IP addresses were
501 identical. For example:
503 Received: from [1.2.3.4] (helo=[1.2.3.4])
505 However, if the real host name was known, it was omitting the HELO data
506 if it matched the actual IP address. This has been tidied up so that it
507 doesn't show the same IP address twice.
509 PH/07 When both +timestamp and +memory debugging was on, the value given by
510 $tod_xxx expansions could be wrong, because the tod_stamp() function was
511 called by the debug printing, thereby overwriting the timestamp buffer.
512 Debugging no longer uses the tod_stamp() function when +timestamp is set.
514 PH/08 When the original message was included in an autoreply transport, it
515 always said "this is a copy of the message, including all the headers",
516 even if body_only or headers_only was set. It now gives an appropriate
519 PH/09 Applied a patch from the Sieve maintainer which:
521 o fixes some comments
522 o adds the (disabled) notify extension core
523 o adds some debug output for the result of if/elsif tests
524 o points to the current vacation draft in the documentation
525 and documents the missing references header update
529 o fixes a bug in processing the envelope test (when testing
530 multiple envelope elements, the last element determinted the
533 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
534 Electronic Mail") by including:
536 Auto-submitted: auto-generated
538 in the messages that it generates (bounce messages and others, such as
539 warnings). In the case of bounce messages for non-SMTP mesages, there was
540 also a typo: it was using "Auto_submitted" (underscore instead of
541 hyphen). Since every message generated by Exim is necessarily in response
542 to another message, thes have all been changed to:
544 Auto-Submitted: auto-replied
546 in accordance with these statements in the RFC:
548 The auto-replied keyword:
550 - SHOULD be used on messages sent in direct response to another
551 message by an automatic process,
553 - MUST NOT be used on manually-generated messages,
555 - MAY be used on Delivery Status Notifications (DSNs) and Message
556 Disposition Notifications (MDNs),
558 - MUST NOT be used on messages generated by automatic or periodic
559 processes, except for messages which are automatic responses to
562 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
563 to the default Received: header definition.
565 PH/12 Added log selector acl_warn_skipped (default on).
567 PH/13 After a successful wildlsearch lookup, discard the values of numeric
568 variables because (a) they are in the wrong storage pool and (b) even if
569 they were copied, it wouldn't work properly because of the caching.
571 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
572 checking when decoding. Apparently there are clients that generate
573 overlong encoded strings. Why am I not surprised?
575 PH/15 If the first argument of "${if match_address" was not empty, but did not
576 contain an "@" character, Exim crashed. Now it writes a panic log message
577 and treats the condition as false.
579 PH/16 In autoreply, treat an empty string for "once" the same as unset.
581 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
582 extension "envelope-auth". The code is finished and in agreement with
583 other implementations, but there is no documentation so far and in fact,
584 nobody wrote the draft yet. This extension is currently #undef'ed, thus
585 not changing the active code.
587 Print executed "if" and "elsif" statements when debugging is used. This
588 helps a great deal to understand what a filter does.
590 Document more things not specified clearly in RFC3028. I had all this
591 sorted out, when out of a sudden new issues came to my mind. Oops."
593 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
596 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
597 canonical form (as documented). However, after a host name lookup from
598 the IP address, check_host() was doing a simple string comparison with
599 addresses acquired from the DNS when checking that the found name did
600 have the original IP as one of its addresses. Since any found IPv6
601 addresses are likely to be in abbreviated form, the comparison could
602 fail. Luckily, there already exists a function for doing the comparison
603 by converting both addresses to binary, so now that is used instead of
606 PH/20 There was another similar case to PH/19, when a complete host name was
607 given in a host list; looking up its IP address could give an abbreviated
608 form, whereas the current host's name might or might not be abbreviated.
609 The same fix has been applied.
615 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
616 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
619 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
620 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
622 PH/03 Typo: missing ".o" in src/pcre/Makefile.
624 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
625 header line, restrict the check to what is listed in RFCs 2369 and 2929.
626 Also, for "Auto-Submitted", treat anything other than "no" as
627 non-personal, in accordance with RFC 3834. (Previously it treated
628 anything starting "auto-" as non-personal.)
630 TF/01 The control=submission/name=... option had a problem with syntax
631 errors if the name included a slash character. The /name= option
632 now slurps the rest of the string, so it can include any characters
633 but it must come last in the list of options (after /sender_retain
636 PH/05 Some modifications to the interface to the fake nameserver for the new
644 TK/01 Added the "success_on_redirect" address verification option. See
645 NewStuff for rationale and an example.
647 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
649 PH/02 Patch to exigrep to allow it to work on syslog lines.
651 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
652 fread() to skip over the body file's header line, because in Cygwin the
653 header line is locked and is inaccessible.
655 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
656 co-exist for some time) to make it clear that it is the Exim ID that is
657 referenced, not the Message-ID: header line.
659 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
660 string_format() function, because snprintf() does not exist on all
663 PH/06 The use of forbid_filter_existstest now also locks out the use of the
664 ${stat: expansion item.
666 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
667 protocol synchronization error", to keep the pedants happy.
669 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
670 well as for IRIX systems, when gcc is being used. See the host.c source
673 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
675 PH/10 Named domain lists were not working if used in a queue_smtp_domains
678 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
679 transport and to the smtp transport in LMTP mode.
681 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
683 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
684 run a filter in a subprocess. This could lead to confusion in subsequent
685 lookups in the parent process. There should also be a search_tidyup() at
686 the end of the subprocess.
688 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
689 only if the host matched helo_try_verify_hosts, which caused the
690 verification to occur when the EHLO/HELO command was issued. The ACL just
691 tested the remembered result. Now, if a previous verification attempt has
692 not happened, "verify = helo" does it there and then.
694 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
696 TK/03 Fix log output including CR from clamd.
698 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
699 exist provoked a memory error which could cause a segfault.
701 PH/15 Installed PCRE 6.2
703 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
705 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
706 of the problem. Specifically, suggested +O2 rather than +O1 for the
709 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
711 PH/20 If a delivery was routed to a non-standard port by means of an SRV
712 record, the port was not correctly logged when the outgoing_port log
713 selector was set (it logged the transort's default port).
715 PH/21 Added support for host-specific ports to manualroute, queryprogram,
716 fallback_hosts, and "hosts" in the smtp transport.
718 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
719 host errors such as "Connection refused".
721 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
722 authentication with radiusclient 0.4.9:
724 - Error returned from rc_read_config was caught wrongly
725 - Username/password not passed on to radius server due to wrong length.
727 The presumption is that some radiusclient API changes for 4.51/PH/17
728 were not taken care of correctly. The code is still untested by me (my
729 Linux distribution still has 0.3.2 of radiusclient), but it was
730 contributed by a Radius user.
732 PH/24 When doing a callout, the value of $domain wasn't set correctly when
733 expanding the "port" option of the smtp transport.
735 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
736 while reading a MIME header. Thanks to Tom Hughes for a patch.
738 PH/24 Include config.h inside local_scan.h so that configuration settings are
741 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
742 that in an ACL for RCPT (for example), you can examine exactly what was
745 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
746 commands, but it was not correctly comparing the address with the actual
747 client host address. Thus, it would show the EHLO address in Received:
748 header lines when this was not necessary.
750 PH/27 Added the % operator to ${eval:}.
752 PH/28 Exim tries to create and chdir to its spool directory when it starts;
753 it should be ignoring failures (because with -C, for example, it has lost
754 privilege). It wasn't ignoring creation failures other than "already
757 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
760 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
761 because an input line was too long, either on its own, or by virtue of
762 too many continuations, the temporary file was not being removed, and the
763 return code was incorrect.
765 PH/31 Missing "BOOL" in function definition in filtertest.c.
767 PH/32 Applied Sieve patches from the maintainer.
769 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
771 PH/33 Added "verify = not_blind".
773 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
774 Local/Makefile (with some defaults set). These are used in built scripts
775 such as exicyclog, but they have never been used in the exim_install
776 script (though there are many overriding facilities there). I have
777 arranged that the exim_install script now takes note of these two
780 PH/35 Installed configuration files for Dragonfly.
782 PH/36 When a locally submitted message by a trusted user did not contain a
783 From: header, and the sender address was obtained from -f or from an SMTP
784 MAIL command, and the trusted user did not use -F to supply a sender
785 name, $originator_name was incorrectly used when constructing a From:
786 header. Furthermore, $originator_name was used for submission mode
787 messages from external hosts without From: headers in a similar way,
788 which is clearly wrong.
790 PH/37 Added control=suppress_local_fixups.
792 PH/38 When log_selector = +received_sender was set, and the addition of the
793 sender made the log line's construction buffer exactly full, or one byte
794 less than full, an overflow happened when the terminating "\n" was
797 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
798 when the result of a list match is failure because a DNS lookup failed.
800 PH/40 RM_COMMAND is now used in the building process.
802 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
803 the "build-* directories that it finds.
805 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
806 address in a domain literal was a prefix of an interface address.
808 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
809 when verifying a sender address, unless rewrite_headers is false.
811 PH/44 Wrote a long comment about why errors_to addresses are verified as
812 recipients, not senders.
814 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
815 the ratelimit ACL was added.
817 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
819 PH/46 Added extra information about PostgreSQL errors to the error string.
821 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
822 avoiding the need to install special zones in a real server. This is
823 backwards compatible; if it can't find the fake resolver, it drops back.
824 Thus, both old and new test suites can be run.
826 TF/02 Added util/ratelimit.pl
828 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
829 clock is set back in time.
831 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
832 Candler <B.Candler@pobox.com>.
834 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
835 OK for addresses that are the result of redirections.
837 PH/48 A number of further additions for the benefit of the new test suite,
838 including a fake gethostbyname() that interfaces to the fake DNS resolver
841 TF/06 The fix for widen_domains has also been applied to qualify_single and
842 search_parents which are the other dnslookup options that can cause
845 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
848 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
850 TF/07 Exim produced the error message "an SRV record indicated no SMTP
851 service" if it encountered an MX record with an empty target hostname.
852 The message is now "an MX or SRV record indicated no SMTP service".
854 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
855 if the DNS of the sending site is misconfigured. This is quite a
856 common situation. This change restores the behaviour of treating a
857 helo verification defer as a failure.
859 PH/51 If self=fail was set on a router, the bounce message did not include the
860 actual error message.
866 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
868 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
869 command itself ended in error, the underlying message about the transport
870 filter timeout was being overwritten with the pipe command error. Now the
871 underlying error message should be appended to the second error message.
873 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
875 PH/02 Reduce the amount of output that "make" produces by default. Full output
876 can still be requested.
878 PH/03 The warning log line about a condition test deferring for a "warn" verb
879 was being output only once per connection, rather than after each
880 occurrence (because it was using the same function as for successful
881 "warn" verbs). This seems wrong, so I have changed it.
883 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
884 it should not have, which might have caused a crash in the right
885 circumstances, but probably never did.
887 PH/04 Installed a modified version of Tony Finch's patch to make submission
888 mode fix the return path as well as the Sender: header line, and to
889 add a /name= option so that you can make the user's friendly name appear
892 TF/03 Added the control = fakedefer ACL modifier.
894 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
895 Mark Lowes for thorough testing.
897 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
899 TK/03 Merged latest SRS patch from Miles Wilton.
901 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
902 with the definition in sysexits.h (which is #included earlier).
903 Fortunately, Exim does not actually use EX_OK. The code used to try to
904 preserve the sysexits.h value, by assumimg that macro definitions were
905 scanned for macro replacements. I have been disabused of this notion,
906 so now the code just undefines EX_OK before #including unistd.h.
908 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
909 in the smtp transport. When a block could not be written in a single
910 write() function, the timeout was being re-applied to each part-write.
911 This seems wrong - if the receiver was accepting one byte at a time it
912 would take for ever. The timeout is now adjusted when this happens. It
913 doesn't have to be particularly precise.
915 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
916 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
918 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
919 without a domain if the check to <postmaster@domain> fails.
921 SC/01 Eximstats: added -xls and the ability to specify output files
922 (patch written by Frank Heydlauf).
924 SC/02 Eximstats: use FileHandles for outputing results.
926 SC/03 Eximstats: allow any combination of xls, txt, and html output.
928 SC/04 Eximstats: fixed display of large numbers with -nvr option
930 SC/05 Eximstats: fixed merging of reports with empty tables.
932 SC/06 Eximstats: added the -include_original_destination flag
934 SC/07 Eximstats: removed tabs and trailing whitespace.
936 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
938 TK/06 MBOX spool code: Add real "From " MBOX separator line
939 so the .eml file is really in mbox format (even though
940 most programs do not really care). Patch from Alex Miller.
942 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
943 The latter is generated from $received_to and is only set if the
944 message has one envelope recipient. SA can use these headers,
945 obviously out-of-the-box. Patch from Alex Miller.
947 PH/08 The ${def test on a variable was returning false if the variable's
948 value was "0", contrary to what the specification has always said!
949 The result should be true unless the variable is empty.
951 PH/09 The syntax error of a character other than { following "${if
952 def:variable_name" (after optional whitespace) was not being diagnosed.
953 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
954 accidental colon was present, for example, could give incorrect results.
956 PH/10 Tidied the code in a number of places where the st_size field of a stat()
957 result is used (not including appendfile, where other changes are about
960 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
961 This involved changing a lot of size variables from int to off_t. It
962 should work with maildirs and everything.
964 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
965 spamd dying while we are connected to it.
967 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
970 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
971 function for BDB 4.3.
973 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
975 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
976 the sources for PCRE have been re-arranged and more files are now
979 PH/15 The code I had for printing potentially long long variables in PH/11
980 above was not the best (it lost precision). The length of off_t variables
981 is now inspected at build time, and an appropriate printing format (%ld
982 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
983 to be "long long int" or "long int". This is needed for the internal
984 formatting function string_vformat().
986 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
987 the configuration file to be ":syslog", then the script "guesses" where
988 the logs files are, rather than using the compiled in default. In our
989 case the guess is not the same as the compiled default, so the script
990 suddenly stopped working when I started to use syslog. The patch checks
991 to see if log_file_path is "". If so, it attempts to read it from exim
992 with no configuration file to get the compiled in version, before it
993 falls back to the previous guessing code."
995 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
996 implementing BATV in an Exim configuration. See NewStuff for the gory
999 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1000 Makefile that are specific to HP-UX.
1002 PH/18 If the "use_postmaster" option was set for a recipient callout together
1003 with the "random" option, the postmaster address was used as the MAIL
1004 FROM address for the random test, but not for the subsequent recipient
1005 test. It is now used for both.
1007 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1008 patch removes a few documentation additions to RFC 3028, because the
1009 latest draft now contains them. It adds the new en;ascii-case comparator
1010 and a new error check for 8bit text in MIME parts. Comparator and
1011 require names are now matched exactly. I enabled the subaddress
1012 extension, but it is not well tested yet (read: it works for me)."
1014 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1015 rework some of the code of TK/09 above to avoid the hardwired use of
1016 "%lld" and "long long". Replaced the call to snprintf() with a call to
1019 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1020 records point to non-existent hosts", "retry timeout exceeded", and
1021 "retry time not reached for any host after a long failure period".
1023 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1024 experimental DomainKeys support:
1026 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1027 (2) On an error such as an illegally used "control", the wrong name for
1028 the control was given.
1030 These problems did NOT occur unless DomainKeys support was compiled.
1032 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1034 PH/24 Added ${if match_ip condition.
1036 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1037 databases so that it will be absolutely obvious if a crash occurs in the
1038 DB library. This is a regular occurrence (often caused by mis-matched
1041 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1042 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1043 picked up on a user's system that detects such things. There doesn't seem
1044 to be a gcc warning option for this - only an attribute that has to be
1045 put on the function's prototype. It seems that in Fedora Core 4 they have
1046 set this on a number of new functions. No doubt there will be more in due
1049 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1050 specify a transport. However, if an address that was verified by such a
1051 router was the subject of a callout, Exim crashed because it tried to
1052 read the rcpt_include_affixes from the non-existent transport. Now it
1053 just assumes that the setting of that option is false. This bug was
1054 introduced by 4.51/PH/31.
1056 PH/28 Changed -d+all to exclude +memory, because that information is very
1057 rarely of interest, but it makes the output a lot bigger. People tend to
1058 do -d+all out of habit.
1060 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1061 code in os-type was giving problems when libc.so lives in lib64, like on
1064 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1065 aren't the modern standard, and it seems that some systems' include files
1066 don't always have them. Exim was already checking for some of the newer
1067 ones like T_AAAA, and defining it itself. I've added checks for all the
1068 record types that Exim uses.
1070 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1071 not automatically generating a new one, as it is supposed to. This
1072 prevented TLS from working. If the file did exist, but contained invalid
1073 data, a new version was generated, as expected. It was only the case of a
1074 non-existent file that was broken.
1076 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1077 with a change in libdomainkeys > 0.64.
1079 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1080 from DNS. If the selector record carries the flag, it now has
1081 precedence over the domain-wide flag.
1083 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1085 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1086 the use of a port name that isn't defined in /etc/services) occurred, the
1087 message was deferred as in a normal delivery, and thus remained on the
1088 spool, instead of being failed because of the mua_wrapper setting. This
1089 is now fixed, and I tidied up some of the mua_wrapper messages at the
1092 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1093 the messages in a hash of arrays rather than using individual hashes.
1094 This is a bit cleaner and results in dramatic memory savings, albeit
1095 at a slight CPU cost.
1097 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1098 as requested by Marc Sherman.
1100 SC/10 Eximstats: added histograms for user specified patterns as requested
1103 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1105 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1106 fopen() in the content-scanning modules that did not already have it.
1112 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1113 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1115 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1117 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1119 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1120 to test Sieve filters that use "vacation".
1122 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1123 that changes the way the GnuTLS parameters are stored in the cache file.
1124 The new format can be generated externally. For backward compatibility,
1125 if the data in the cache doesn't make sense, Exim assumes it has read an
1126 old-format file, and it generates new data and writes a new file. This
1127 means that you can't go back to an older release without removing the
1130 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1131 work if there are any delivery delays because "one_time" forces the
1132 parent to be marked "delivered", so its unseen clone is never tried
1133 again. For this reason, Exim now forbids the simultaneous setting of
1136 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1137 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1138 entry if you want to know the details. The fix, however, neglected to
1139 consider the case when local delivery batching is involved. The test for
1140 "previously delivered" was not happening when checking to see if an
1141 address could be batched with a previous (undelivered) one; under
1142 certain circumstances this could lead to multiple deliveries to the same
1145 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1146 in its include files, and this causes problems building Exim.
1148 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1149 header_syntax) but Exim was just ignoring anything given after a slash.
1150 In particular, this caused confusion with an attempt to use "verify =
1151 reverse_host_lookup/defer_ok". An error is now given when options are
1152 supplied for verify items that do not have them. (Maybe reverse_host_
1153 lookup should have a defer_ok option, but that's a different point.)
1155 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1156 defined by RFC 821) to 2048, because there were problems with some AUTH
1157 commands, and RFC 1869 says the size should be increased for extended
1158 SMTP commands that take arguments.
1160 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1163 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1164 "unknown" error; now it says that the functionality isn't in the binary.
1166 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1167 an address' error message when a string expansion fails (syntax or
1168 whatever). Otherwise the password may appear in the log. Following change
1169 PH/42 below, there is no longer a chance of it appearing in a bounce
1172 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1174 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1175 of its addresses was ever tried. (Bugzilla bug #2.)
1177 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1178 the result incorrectly in the debug output. (It correctly added a newline
1179 to what was transported.)
1181 TF/01 Added $received_time.
1183 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1184 commented out examples of how to interface to a virus scanner and to
1185 SpamAssassin. Also added commented examples of av_scanner and
1186 spamd_address settings.
1188 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1189 and controls are allowed in which ACLs. There were a couple of minor
1190 errors. Some of the entries in the conditions table (which is a table of
1191 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1192 negation of where the condition IS allowed.
1194 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1196 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1197 header file does not have a version number, so I've had to invent a new
1198 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1199 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1200 radiusclient), but it was contributed by a Radius user.
1202 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1203 files or directories, for OpenSSL.
1205 PH/19 When an Exim process that is running as root has to create an Exim log
1206 file, it does so in a subprocess that runs as exim:exim so as to get the
1207 ownership right at creation (otherwise, other Exim processes might see
1208 the file with the wrong ownership). There was no test for failure of this
1209 fork() call, which would lead to the process getting stuck as it waited
1210 for a non-existent subprocess. Forks do occasionally fail when resources
1211 run out. I reviewed all the other calls to fork(); they all seem to check
1214 PH/20 When checking for unexpected SMTP input at connect time (before writing
1215 the banner), Exim was not dealing correctly with a non-positive return
1216 from the read() function. If the client had disconnected by this time,
1217 the result was a log entry for a synchronization error with an empty
1218 string after "input=" when read() returned zero. If read() returned -1
1219 (an event I could not check), uninitialized data bytes were printed.
1220 There were reports of junk text (parts of files, etc) appearing after
1223 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1225 PH/22 Added support for macro redefinition, and (re)definition in between
1226 driver and ACL definitions.
1228 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1229 forgetting to use the resulting value; it was using the unexpanded value.
1231 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1232 hadn't been configured. The fix is from Juergen Kreileder, who
1233 understands it better than I do:
1235 "Here's what I see happening with three configured cyrus_sasl
1236 authenticators configured (plain, login, cram-md5):
1238 On startup auth_cyrus_sasl_init() gets called for each of these.
1239 This means three calls to sasl_listmech() without a specified mech_list.
1240 => SASL tests which mechs of all available mechs actually work
1241 => three warnings about OTP not working
1242 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1244 With the patch, sasl_listmech() also gets called three times. But now
1245 SASL's mech_list option is set to the server_mech specified in the the
1246 authenticator. Or in other words, the answer from sasl_listmech()
1247 gets limited to just the mech you're testing for (which is different
1249 => the return list contains just 'plain' or 'login', 'cram-md5' or
1250 nothing depending on the value of ob->server_mech.
1252 I've just tested the patch: Authentication still works fine,
1253 unavailable mechs specified in the exim configuration are still
1254 caught, and the auth.log warnings about OTP are gone."
1256 PH/25 When debugging is enabled, the contents of the command line are added
1257 to the debugging output, even when log_selector=+arguments is not
1260 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1261 answer is "GNU", and only if the return is "GNU/something" is the answer
1264 PH/27 $acl_verify_message is now set immediately after the failure of a
1265 verification in an ACL, and so is available in subsequent modifiers. In
1266 particular, the message can be preserved by coding like this:
1268 warn !verify = sender
1269 set acl_m0 = $acl_verify_message
1271 Previously, $acl_verify_message was set only while expanding "message"
1272 and "log_message" when a very denied access.
1274 PH/28 Modified OS/os.c-Linux with
1276 -#ifndef OS_LOAD_AVERAGE
1277 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1279 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1280 nomenclature these days.)
1282 PH/29 Installed patch from the Sieve maintainer that adds the options
1283 sieve_useraddress and sieve_subaddress to the redirect router.
1285 PH/30 In these circumstances:
1286 . Two addresses routed to the same list of hosts;
1287 . First host does not offer TLS;
1288 . First host accepts first address;
1289 . First host gives temporary error to second address;
1290 . Second host offers TLS and a TLS session is established;
1291 . Second host accepts second address.
1292 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1293 and peerdn, if requested) that were in fact used only for the second
1296 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1297 attention to any local part prefix or suffix that was matched by the
1298 router that accepted the address. It now behaves in the same way as it
1299 does for delivery: the affixes are removed from the local part unless
1300 rcpt_include_affixes is set on the transport.
1302 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1303 timeout during the DATA phase of an incoming message.
1305 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1306 applied a patch sanctioned by the Sieve maintainer.
1308 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1309 the uid or gid is negative. A case of a negative gid caused this to be
1310 noticed. The fix allows for either to be negative.
1312 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1313 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1316 PH/36 The change PH/12 above was broken. Fixed it.
1318 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1319 the grounds that routing the same address twice would always produce the
1320 same answer. This might have been true once, but it is certainly no
1321 longer true now. Routing a child address may depend on the previous
1322 routing that produced that child. Some complicated redirection strategies
1323 went wrong when messages had multiple recipients, and made Exim's
1324 behaviour dependent on the order in which the addresses were given.
1326 I have moved the duplicate checking until after the routing is complete.
1327 Exim scans the addresses that are assigned to local and remote
1328 transports, and removes any duplicates. This means that more work will be
1329 done, as duplicates will always all be routed, but duplicates are
1330 presumably rare, so I don't expect this is of any significance.
1332 For deliveries to pipes, files, and autoreplies, the duplicate checking
1333 still happens during the routing process, since they are not going to be
1336 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1337 It corrects a timeout issue with spamd. This is Ian's comment: "The
1338 background is that sometimes spamd either never reads data from a
1339 connection it has accepted, or it never writes response data. The exiscan
1340 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1341 blindly assumes that writes won't block so it may never time out."
1343 PH/39 Allow G after quota size as well as K and M.
1345 PH/40 The value set for $authenticated_id in an authenticator may not contain
1346 binary zeroes or newlines because the value is written to log lines and
1347 to spool files. There was no check on this. Now the value is run through
1348 the string_printing() function so that such characters are converted to
1349 printable escape sequences.
1351 PH/41 $message_linecount is a new variable that contains the total number of
1352 lines in the message. Compare $body_linecount, which is the count for the
1355 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1356 bounce and delay warning messages, except in certain special cases, which
1359 (a) An SMTP error message from a remote host;
1360 (b) A message specified in a :fail: redirection;
1361 (c) A message specified in a "fail" command in a system filter;
1362 (d) A message specified in a FAIL return from the queryprogram router;
1363 (e) A message specified by the cannot_route_message router option.
1365 In these cases only, Exim does include the error details in bounce and
1366 warning messages. There are also a few cases where bland messages such
1367 as "unrouteable address" or "local delivery error" are given.
1369 PH/43 $value is now also set for the "else" part of a ${run expansion.
1371 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1372 being worked on, but at least Exim now implements the latest version to
1375 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1376 process to complete was treated as a delivery failure, a timeout while
1377 writing the message to the pipe was logged, but erroneously treated as a
1378 successful delivery. Such timeouts include transport filter timeouts. For
1379 consistency with the overall process timeout, these timeouts are now
1380 treated as errors, giving rise to delivery failures by default. However,
1381 there is now a new Boolean option for the pipe transport called
1382 timeout_defer, which, if set TRUE, converts the failures into defers for
1383 both kinds of timeout. A transport filter timeout is now identified in
1386 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1387 systems where "make" and "gmake" are different, calling "gmake" at top
1388 level broke things. I've arranged for the value of $(MAKE) to be passed
1389 from the Makefile to this script so that it can call the same version of
1393 A note about Exim versions 4.44 and 4.50
1394 ----------------------------------------
1396 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1397 changes of various kinds. As a consequence, a big documentation update was
1398 needed. This delayed the release for rather longer than seemed good, especially
1399 in the light of a couple of (minor) security issues. Therefore, the changes
1400 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1401 release. So 4.44 and 4.50 are in effect two different branches that both start
1404 I have left the 4.50 change log unchanged; it contains all the changes since
1405 4.43. The change log for 4.44 is below; many of its items are identical to
1406 those for 4.50. This seems to be the most sensible way to preserve the
1407 historical information.
1413 1. Minor wording change to the doc/README.SIEVE file.
1415 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1416 computation of the current number of files was incorrect.
1418 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1419 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1422 4. Give more explanation in the error message when the command for a transport
1423 filter fails to execute.
1425 5. There are several places where Exim runs a non-Exim command in a
1426 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1427 was being done only for the command run by the queryprogram router. It is
1428 now done for all such subprocesses. The other cases are: ${run, transport
1429 filters, and the commands run by the lmtp and pipe transports.
1431 6. Added CONFIGURE_GROUP build-time option.
1433 7. Some older OS have a limit of 256 on the maximum number of file
1434 descriptors. Exim was using setrlimit() to set 1000 as a large value
1435 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1436 systems. I've change it so that if it can't get 1000, it tries for 256.
1438 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1439 was an oversight, and furthermore, ever since the addition of extra
1440 controls (e.g. 4.43/32), the checks on when to allow different forms of
1441 "control" were broken. There should now be diagnostics for all cases when a
1442 control that does not make sense is encountered.
1444 9. Added the /retain_sender option to "control=submission".
1446 10. $recipients is now available in the predata ACL (oversight).
1448 11. Tidy the search cache before the fork to do a delivery from a message
1449 received from the command line. Otherwise the child will trigger a lookup
1450 failure and thereby defer the delivery if it tries to use (for example) a
1451 cached ldap connection that the parent has called unbind on.
1453 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1454 of $address_data from the recipient verification was clobbered by the
1455 sender verification.
1457 13. The value of address_data from a sender verification is now available in
1458 $sender_address_data in subsequent conditions in the ACL statement.
1460 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1462 15. Added a new option "connect=<time>" to callout options, to set a different
1465 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1466 was its contents. (It was OK if the option was not defined at all.)
1468 17. A "Completed" log line is now written for messages that are removed from
1469 the spool by the -Mrm option.
1471 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1472 information about exactly what failed.
1474 19. Added -dd to debug only the daemon process.
1476 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1477 handles timeouts, both on the server side and network timeouts. Renamed the
1478 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1480 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1481 It is now set to "smtps".
1483 22. $host_address is now set to the target address during the checking of
1484 ignore_target_hosts.
1486 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1487 being passed; this would have caused $sender_host_name to have been used if
1488 matching the list had actually called for a host name (not very likely,
1489 since this list is usually IP addresses). A host name is now passed as
1492 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1493 code that specifies a non-restarting handler (typically sigaction() in
1494 modern systems) in an attempt to fix a rare and obscure crash bug.
1496 25. Narrowed the window for a race in the daemon that could cause it to ignore
1497 SIGCHLD signals. This is not a major problem, because they are used only to
1498 wake it up if nothing else does.
1500 26. A malformed maildirsize file could cause Exim to calculate negative values
1501 for the mailbox size or file count. Odd effects could occur as a result.
1502 The maildirsize information is now recalculated if the size or filecount
1505 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1506 support for a long time. Removed HAVE_SYS_VFS_H.
1508 28. Installed the latest version of exipick from John Jetmore.
1510 29. In an address list, if the pattern was not a regular expression, an empty
1511 subject address (from a bounce message) matched only if the pattern was an
1512 empty string. Non-empty patterns were not even tested. This was the wrong
1513 because it is perfectly reasonable to use an empty address as part of a
1514 database query. An empty address is now tested by patterns that are
1515 lookups. However, all the other forms of pattern expect the subject to
1516 contain a local part and a domain, and therefore, for them, an empty
1517 address still always fails if the pattern is not itself empty.
1519 30. Exim went into a mad DNS loop when attempting to do a callout where the
1520 host was specified on an smtp transport, and looking it up yielded more
1521 than one IP address.
1523 31. Re-factored the code for checking spool and log partition space into a
1524 function that finds that data and another that does the check. The former
1525 is then used to implement four new variables: $spool_space, $log_space,
1526 $spool_inodes, and $log_inodes.
1528 32. The RFC2047 encoding function was originally intended for short strings
1529 such as real names; it was not keeping to the 75-character limit for
1530 encoded words that the RFC imposes. It now respects the limit, and
1531 generates multiple encoded words if necessary. To be on the safe side, I
1532 have increased the buffer size for the ${rfc2047: expansion operator from
1535 33. It is now permitted to omit both strings after an "if" condition; if the
1536 condition is true, the result is "true". As before, when the second string
1537 is omitted, a false condition yields an empty string. This makes it less
1538 cumbersome to write custom ACL and router conditions.
1540 34. Failure to deliver a bounce message always caused it to be frozen, even if
1541 there was an errors_to setting on the router. The errors_to setting is now
1544 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1545 canonical form (fully expanded) before being placed in
1546 $sender_host_address.
1548 36. The table in the code that translates DNS record types into text (T_A to
1549 "A" for instance) was missing entries for NS and CNAME. It is just possible
1550 that this could have caused confusion if both these types were looked up
1551 for the same domain, because the text type is used as part of Exim's
1552 per-process caching. But the chance of anyone hitting this buglet seems
1555 37. The dnsdb lookup has been extended in a number of ways.
1557 (1) There is a new type, "zns", which walks up the domain tree until it
1558 finds some nameserver records. It should be used with care.
1560 (2) There is a new type, "mxh", which is like "mx" except that it returns
1561 just the host names, not the priorities.
1563 (3) It is now possible to give a list of domains (or IP addresses) to be
1564 looked up. The behaviour when one of the lookups defers can be
1565 controlled by a keyword.
1567 (4) It is now possible to specify the separator character for use when
1568 multiple records are returned.
1570 38. The dnslists ACL condition has been extended: it is now possible to supply
1571 a list of IP addresses and/or domains to be looked up in a particular DNS
1574 39. Added log_selector=+queue_time_overall.
1576 40. When running the queue in the test harness, wait just a tad after forking a
1577 delivery process, to get repeatability of debugging output.
1579 41. Include certificate and key file names in error message when GnuTLS fails
1580 to set them up, because the GnuTLS error message doesn't include the name
1581 of the failing file when there is a problem reading it.
1583 42. Allow both -bf and -bF in the same test run.
1585 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1587 44. The "Exiscan patch" is now merged into the mainline Exim source.
1589 45. Sometimes the final signoff response after QUIT could fail to get
1590 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1591 < 0 before doing a fflush(). This bug looks as though it goes back to the
1592 introduction of TLS in release 3.20, but "sometimes" must have been rare
1593 because the tests only now provoked it.
1595 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1596 (this can affect the format of dates).
1598 47. exim_tidydb, when checking for the continued existence of a message for
1599 which it has found a message-specific retry record, was not finding
1600 messages that were in split spool directories. Consequently, it was
1601 deleting retry records that should have stayed in existence.
1603 48. Steve fixed some bugs in eximstats.
1605 49. The SPA authentication driver was not abandoning authentication and moving
1606 on to the next authenticator when an expansion was forced to fail,
1607 contradicting the general specification for all authenticators. Instead it
1608 was generating a temporary error. It now behaves as specified.
1610 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1611 (the order specifies the preference for clients). The order is now AES256,
1612 AES128, 3DES, ARCFOUR128.
1614 51. Small patch to Sieve code - explicitly set From: when generating an
1617 52. Exim crashed if a remote delivery caused a very long error message to be
1618 recorded - for instance if somebody sent an entire SpamAssassin report back
1619 as a large number of 550 error lines. This bug was coincidentally fixed by
1620 increasing the size of one of Exim's internal buffers (big_buffer) that
1621 happened as part of the Exiscan merge. However, to be on the safe side, I
1622 have made the code more robust (and fixed the comments that describe what
1625 53. Now that there can be additional text after "Completed" in log lines (if
1626 the queue_time_overall log selector is set), a one-byte patch to exigrep
1627 was needed to allow it to recognize "Completed" as not the last thing in
1630 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1631 patch that reportedly fixes this has been added. I am not expert enough to
1632 create a test for it. This is what the patch creator wrote:
1634 "I found a little strange behaviour of ldap code when working with
1635 Windows 2003 AD Domain, where users was placed in more than one
1636 Organization Units. When I tried to give exim partial DN, the exit code
1637 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1638 But simultaneously result of request was absolutely normal ldap result,
1639 so I produce this patch..."
1641 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1642 REFERENCE, so I have modified the code to exclude the patch when that macro
1645 55. Some experimental protocols are using DNS PTR records for new purposes. The
1646 keys for these records are domain names, not reversed IP addresses. The
1647 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1648 leaves it alone. Component reversal etc. now happens only for IP addresses.
1651 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1653 57. Double the size of the debug message buffer (to 2048) so that more of very
1654 long debug lines gets shown.
1656 58. The exicyclog utility now does better if the number of log files to keep
1657 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1659 59. Two changes related to the smtp_active_hostname option:
1661 (1) $smtp_active_hostname is now available as a variable.
1662 (2) The default for smtp_banner uses $smtp_active_hostname instead
1663 of $primary_hostname.
1665 60. The host_aton() function is supposed to be passed a string that is known
1666 to be a valid IP address. However, in the case of IPv6 addresses, it was
1667 not checking this. This is a hostage to fortune. Exim now panics and dies
1668 if the condition is not met. A case was found where this could be provoked
1669 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1670 components; fortuitously, this particular loophole had already been fixed
1671 by change 4.50/55 above.
1673 If there are any other similar loopholes, the new check in host_aton()
1674 itself should stop them being exploited. The report I received stated that
1675 data on the command line could provoke the exploit when Exim was running as
1676 exim, but did not say which command line option was involved. All I could
1677 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1678 running as the user.
1681 61. There was a buffer overflow vulnerability in the SPA authentication code
1682 (which came originally from the Samba project). I have added a test to the
1683 spa_base64_to_bits() function which I hope fixes it.
1686 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1687 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1689 63. The daemon start-up calls getloadavg() while still root for those OS that
1690 need the first call to be done as root, but it missed one case: when
1691 deliver_queue_load_max is set with deliver_drop_privilege. This is
1692 necessary for the benefit of the queue runner, because there is no re-exec
1693 when deliver_drop_privilege is set.
1695 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1696 This has been fixed.
1698 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1699 was in use, was not putting the data itself into the right store pool;
1700 consequently, it could be overwritten for a subsequent message in the same
1701 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1704 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1706 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1707 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1708 the function were treating the return as a boolean value, which happened to
1709 work because 0=false and not-0=true, but is not correct code.
1711 68. The host_aton() function was not handling scoped IPv6 addresses (those
1712 with, for example, "%eth0" on the end) correctly.
1714 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1715 negated items (that is, ~something) in unsigned ints. Some compilers
1716 apparently mutter when there is no cast.
1718 70. If an address verification called from an ACL failed, and did not produce a
1719 user-specific message (i.e. there was only a "system" message), nothing was
1720 put in $acl_verify_message. In this situation, it now puts the system
1723 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1724 session; change 4.31/43 added the unwanted input to the log line - except
1725 that it did not do this in the start of session case. It now does.
1727 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1728 This is wrong and can cause the other end to generate a synchronization
1729 error if it is another Exim or anything else that does the synchronization
1730 check. A QUIT command is no longer sent after a timeout.
1732 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1733 during host lookups.
1735 74. The defer_ok option of callout verification was not working if it was used
1736 when verifying addresses in header lines, that is, for this case:
1738 verify = header_sender/callout=defer_ok
1740 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1741 those file descriptors could be used for SMTP connections. If anything
1742 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1743 could be sent to the SMTP client, causing chaos. The daemon now opens
1744 stdin, stdout, and stderr to /dev/null when it puts itself into the
1747 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1748 log by default. The user can override this with suitable Perl magic.
1750 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1751 the log message when discard triggers, was not working for the DATA ACL or
1752 for the non-SMTP ACL.
1754 78. Error message wording change in sieve.c.
1756 79. If smtp_accept_max_per_host was set, the number of connections could be
1757 restricted to fewer than expected, because the daemon was trying to set up
1758 a new connection before checking whether the processes handling previous
1759 connections had finished. The check for completed processes is now done
1760 earlier. On busy systems, this bug wouldn't be noticed because something
1761 else would have woken the daemon, and it would have reaped the completed
1764 80. If a message was submitted locally by a user whose login name contained one
1765 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1766 It caused a spool format error. I have fixed the spool reading code. A
1767 related problem was that the "from" clause in the Received: line became
1768 illegal because of the space(s). It is now covered by ${quote_local_part.
1770 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1773 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1775 83. Patch from Sieve maintainer to fix unterminated string problem in
1776 "vacation" handling.
1778 84. Some minor changes to the Linux configuration files to help with other
1779 OS variants using glibc.
1781 85. One more patch for Sieve to update vacation handling to latest spec.
1784 ----------------------------------------------------
1785 See the note above about the 4.44 and 4.50 releases.
1786 ----------------------------------------------------
1792 1. Change 4.43/35 introduced a bug that caused file counts to be
1793 incorrectly computed when quota_filecount was set in an appendfile
1796 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1797 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1800 3. Give more explanation in the error message when the command for a transport
1801 filter fails to execute.
1803 4. There are several places where Exim runs a non-Exim command in a
1804 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1805 was being done only for the command run by the queryprogram router. It is
1806 now done for all such subprocesses. The other cases are: ${run, transport
1807 filters, and the commands run by the lmtp and pipe transports.
1809 5. Some older OS have a limit of 256 on the maximum number of file
1810 descriptors. Exim was using setrlimit() to set 1000 as a large value
1811 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1812 systems. I've change it so that if it can't get 1000, it tries for 256.
1814 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1815 was an oversight, and furthermore, ever since the addition of extra
1816 controls (e.g. 4.43/32), the checks on when to allow different forms of
1817 "control" were broken. There should now be diagnostics for all cases when a
1818 control that does not make sense is encountered.
1820 7. $recipients is now available in the predata ACL (oversight).
1822 8. Tidy the search cache before the fork to do a delivery from a message
1823 received from the command line. Otherwise the child will trigger a lookup
1824 failure and thereby defer the delivery if it tries to use (for example) a
1825 cached ldap connection that the parent has called unbind on.
1827 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1828 of $address_data from the recipient verification was clobbered by the
1829 sender verification.
1831 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1832 was its contents. (It was OK if the option was not defined at all.)
1834 11. A "Completed" log line is now written for messages that are removed from
1835 the spool by the -Mrm option.
1837 12. $host_address is now set to the target address during the checking of
1838 ignore_target_hosts.
1840 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1841 being passed; this would have caused $sender_host_name to have been used if
1842 matching the list had actually called for a host name (not very likely,
1843 since this list is usually IP addresses). A host name is now passed as
1846 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1847 code that specifies a non-restarting handler (typically sigaction() in
1848 modern systems) in an attempt to fix a rare and obscure crash bug.
1850 15. Narrowed the window for a race in the daemon that could cause it to ignore
1851 SIGCHLD signals. This is not a major problem, because they are used only to
1852 wake it up if nothing else does.
1854 16. A malformed maildirsize file could cause Exim to calculate negative values
1855 for the mailbox size or file count. Odd effects could occur as a result.
1856 The maildirsize information is now recalculated if the size or filecount
1859 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1860 support for a long time. Removed HAVE_SYS_VFS_H.
1862 18. Updated exipick to current release from John Jetmore.
1864 19. Allow an empty sender to be matched against a lookup in an address list.
1865 Previously the only cases considered were a regular expression, or an
1868 20. Exim went into a mad DNS lookup loop when doing a callout where the
1869 host was specified on the transport, if the DNS lookup yielded more than
1872 21. The RFC2047 encoding function was originally intended for short strings
1873 such as real names; it was not keeping to the 75-character limit for
1874 encoded words that the RFC imposes. It now respects the limit, and
1875 generates multiple encoded words if necessary. To be on the safe side, I
1876 have increased the buffer size for the ${rfc2047: expansion operator from
1879 22. Failure to deliver a bounce message always caused it to be frozen, even if
1880 there was an errors_to setting on the router. The errors_to setting is now
1883 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1884 canonical form (fully expanded) before being placed in
1885 $sender_host_address.
1887 24. Updated eximstats to version 1.33
1889 25. Include certificate and key file names in error message when GnuTLS fails
1890 to set them up, because the GnuTLS error message doesn't include the name
1891 of the failing file when there is a problem reading it.
1893 26. Expand error message when OpenSSL has problems setting up cert/key files.
1896 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1897 (this can affect the format of dates).
1899 28. exim_tidydb, when checking for the continued existence of a message for
1900 which it has found a message-specific retry record, was not finding
1901 messages that were in split spool directories. Consequently, it was
1902 deleting retry records that should have stayed in existence.
1904 29. eximstats updated to version 1.35
1905 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1906 1.35 - bugfix such that pie charts by volume are generated correctly
1908 30. The SPA authentication driver was not abandoning authentication and moving
1909 on to the next authenticator when an expansion was forced to fail,
1910 contradicting the general specification for all authenticators. Instead it
1911 was generating a temporary error. It now behaves as specified.
1913 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1914 (the order specifies the preference for clients). The order is now AES256,
1915 AES128, 3DES, ARCFOUR128.
1917 31. Small patch to Sieve code - explicitly set From: when generating an
1920 32. Exim crashed if a remote delivery caused a very long error message to be
1921 recorded - for instance if somebody sent an entire SpamAssassin report back
1922 as a large number of 550 error lines. This bug was coincidentally fixed by
1923 increasing the size of one of Exim's internal buffers (big_buffer) that
1924 happened as part of the Exiscan merge. However, to be on the safe side, I
1925 have made the code more robust (and fixed the comments that describe what
1928 33. Some experimental protocols are using DNS PTR records for new purposes. The
1929 keys for these records are domain names, not reversed IP addresses. The
1930 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1931 leaves it alone. Component reversal etc. now happens only for IP addresses.
1934 34. The host_aton() function is supposed to be passed a string that is known
1935 to be a valid IP address. However, in the case of IPv6 addresses, it was
1936 not checking this. This is a hostage to fortune. Exim now panics and dies
1937 if the condition is not met. A case was found where this could be provoked
1938 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1939 components; fortuitously, this particular loophole had already been fixed
1940 by change 4.50/55 or 4.44/33 above.
1942 If there are any other similar loopholes, the new check in host_aton()
1943 itself should stop them being exploited. The report I received stated that
1944 data on the command line could provoke the exploit when Exim was running as
1945 exim, but did not say which command line option was involved. All I could
1946 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1947 running as the user.
1950 35. There was a buffer overflow vulnerability in the SPA authentication code
1951 (which came originally from the Samba project). I have added a test to the
1952 spa_base64_to_bits() function which I hope fixes it.
1955 36. The daemon start-up calls getloadavg() while still root for those OS that
1956 need the first call to be done as root, but it missed one case: when
1957 deliver_queue_load_max is set with deliver_drop_privilege. This is
1958 necessary for the benefit of the queue runner, because there is no re-exec
1959 when deliver_drop_privilege is set.
1961 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1962 was in use, was not putting the data itself into the right store pool;
1963 consequently, it could be overwritten for a subsequent message in the same
1964 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1967 38. Sometimes the final signoff response after QUIT could fail to get
1968 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1969 < 0 before doing a fflush(). This bug looks as though it goes back to the
1970 introduction of TLS in release 3.20, but "sometimes" must have been rare
1971 because the tests only now provoked it.
1977 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1978 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1979 Now it returns an integer. A number of calls were still expecting a T/F
1980 return. Fortuitously, in all cases, the tests worked in OK situations,
1981 which is the norm. However, things would have gone wrong on any write
1982 failures on the smtp file descriptor. This function is used when sending
1983 messages over SMTP and also when doing verify callouts.
1985 2. When Exim is called to do synchronous delivery of a locally submitted
1986 message (the -odf or -odi options), it no longer closes stderr before doing
1989 3. Implemented the mua_wrapper option.
1991 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1993 5. Implemented the functions header_remove(), header_testname(),
1994 header_add_at_position(), and receive_remove_recipient(), and exported them
1997 6. If an ACL "warn" statement specified the addition of headers, Exim already
1998 inserted X-ACL-Warn: at the start if there was no header name. However, it
1999 was not making this test for the second and subsequent header lines if
2000 there were newlines in the string. This meant that an invalid header could
2001 be inserted if Exim was badly configured.
2003 7. Allow an ACL "warn" statement to add header lines at the start or after all
2004 the Received: headers, as well as at the end.
2006 8. Added the rcpt_4xx retry error code.
2008 9. Added postmaster_mailfrom=xxx to callout verification option.
2010 10. Added mailfrom=xxxx to the callout verification option, for verify=
2013 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2014 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2016 12. Inserted some casts to stop certain compilers warning when using pointer
2017 differences as field lengths or precisions in printf-type calls (mostly
2018 affecting debugging statements).
2020 13. Added optional readline() support for -be (dynamically loaded).
2022 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2023 same clock tick as a message's arrival, so that its received time was the
2024 same as the "first fail" time on the retry record, and that message
2025 remained on the queue past the ultimate address timeout, every queue runner
2026 would try a delivery (because it was past the ultimate address timeout) but
2027 after another failure, the ultimate address timeout, which should have then
2028 bounced the address, did not kick in. This was a "< instead of <=" error;
2029 in most cases the first failure would have been in the next clock tick
2030 after the received time, and all would be well.
2032 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2033 being recognized when the domain list was tested by the match_domain
2034 condition in an expansion string.
2036 16. Added the ${str2b64: operator.
2038 17. Exim was always calling setrlimit() to set a large limit for the number of
2039 processes, without checking whether the existing limit was already
2040 adequate. (It did check for the limit on file descriptors.) Furthermore,
2041 errors from getrlimit() and setrlimit() were being ignored. Now they are
2042 logged to the main and panic logs, but Exim does carry on, to try to do its
2043 job under whatever limits there are.
2045 18. Imported PCRE 5.0.
2047 19. Trivial typo in log message " temporarily refused connection" (the leading
2050 20. If the log selector return_path_on_delivery was set and an address was
2051 redirected to /dev/null, the delivery process crashed because it assumed
2052 that a return path would always be set for a "successful" delivery. In this
2053 case, the whole delivery is bypassed as an optimization, and therefore no
2056 21. Internal re-arrangement: the function for sending a challenge and reading
2057 a response while authentication was assuming a zero-terminated challenge
2058 string. It's now changed to take a pointer and a length, to allow for
2059 binary data in such strings.
2061 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2063 23. Exim was not respecting finduser_retries when seeking the login of the
2064 uid under which it was called; it was always trying 10 times. (The default
2065 setting of finduser_retries is zero.) Also, it was sleeping after the final
2066 failure, which is pointless.
2068 24. Implemented tls_on_connect_ports.
2070 25. Implemented acl_smtp_predata.
2072 26. If the domain in control=submission is set empty, Exim assumes that the
2073 authenticated id is a complete email address when it generates From: or
2074 Sender: header lines.
2076 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2077 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2078 chown and chgrp in /bin and hostname in /usr/bin.
2080 28. Exim was keeping the "process log" file open after each use, just as it
2081 does for the main log. This opens the possibility of it remaining open for
2082 long periods when the USR1 signal hits a daemon. Occasional processlog
2083 errors were reported, that could have been caused by this. Anyway, it seems
2084 much more sensible not to leave this file open at all, so that is what now
2087 29. The long-running daemon process does not normally write to the log once it
2088 has entered its main loop, and it closes the log before doing so. This is
2089 so that log files can straightforwardly be renamed and moved. However,
2090 there are a couple of unusual error situations where the daemon does write
2091 log entries, and I had neglected to close the log afterwards.
2093 30. The text of an SMTP error response that was received during a remote
2094 delivery was being truncated at 512 bytes. This is too short for some of
2095 the long messages that one sometimes sees. I've increased the limit to
2098 31. It is now possible to make retry rules that apply only when a message has a
2099 specific sender, in particular, an empty sender.
2101 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2102 it possible to be selective about when SMTP synchronization is enforced.
2104 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2106 32. Implemented hosts_connection_nolog.
2108 33. Added an ACL for QUIT.
2110 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2113 35. Added mailbox_size and mailbox_filecount to appendfile.
2115 36. Added control = no_multiline_responses to ACLs.
2117 37. There was a bug in the logic of the code that waits for the clock to tick
2118 in the case where the clock went backwards by a substantial amount such
2119 that the microsecond fraction of "now" was more than the microsecond
2120 fraction of "then" (but the whole seconds number was less).
2122 38. Added support for the libradius Radius client library this is found on
2123 FreeBSD (previously only the radiusclient library was supported).
2129 1. When certain lookups returned multiple values in the form name=value, the
2130 quoting of the values was not always being done properly. Specifically:
2131 (a) If the value started with a double quote, but contained no whitespace,
2133 (b) If the value contained whitespace other than a space character (i.e.
2134 tabs or newlines or carriage returns) it was not quoted.
2135 This fix has been applied to the mysql and pgsql lookups by writing a
2136 separate quoting function and calling it from the lookup code. The fix
2137 should probably also be applied to nisplus, ibase and oracle lookups, but
2138 since I cannot test any of those, I have not disturbed their existing code.
2140 2. A hit in the callout cache for a specific address caused a log line with no
2141 reason for rejecting RCPT. Now it says "Previous (cached) callout
2142 verification failure".
2144 3. There was an off-by-one bug in the queryprogram router. An over-long
2145 return line was truncated at 256 instead of 255 characters, thereby
2146 overflowing its buffer with the terminating zero. As well as fixing this, I
2147 have increased the buffer size to 1024 (and made a note to document this).
2149 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2150 when Exim is waiting for an SMTP response from a remote server, Exim
2151 restarts its select() call on the socket, thereby resetting its timeout.
2152 This is not a problem when such interrupts are rare. Somebody set up a cron
2153 job to run exiwhat every 2 minutes, which is less than the normal select()
2154 timeout (5 or 10 minutes). This meant that the select() timeout never
2155 kicked in because it was always reset. I have fixed this by comparing the
2156 time when an interrupt arrives with the time at the start of the first call
2157 to select(). If more time than the timeout has elapsed, the interrupt is
2158 treated as a timeout.
2160 5. Some internal re-factoring in preparation for the addition of Sieve
2161 extensions (by MH). In particular, the "personal" test is moved to a
2162 separate function, and given an option for scanning Cc: and Bcc: (which is
2163 not set for Exim filters).
2165 6. When Exim created an email address using the login of the caller as the
2166 local part (e.g. when creating a From: or Sender: header line), it was not
2167 quoting the local part when it contained special characters such as @.
2169 7. Installed new OpenBSD configuration files.
2171 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2172 try to make them clearer.
2174 9. Callout options, other than the timeout value, were being ignored when
2175 verifying sender addresses in header lines. For example, when using
2177 verify = header_sender/callout=no_cache
2179 the cache was (incorrectly) being used.
2181 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2182 only the Cygwin environment.
2184 11. When return_path_on_delivery was set as a log selector, if different remote
2185 addresses in the same message used different return paths and parallel
2186 remote delivery occurred, the wrong values would sometimes be logged.
2187 (Whenever a remote delivery process finished, the return path value from
2188 the most recently started remote delivery process was logged.)
2190 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2191 lines when AUTH and/or TLS are in use. This is the "received protocol"
2192 field. Exim used to use "asmtp" for authenticated SMTP, without any
2193 indication (in the protocol name) for TLS use. Now it follows the RFC and
2194 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2195 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2196 names appear in log lines as well as in Received: header lines.
2198 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2199 extensions, and comparison tests, and to fix some bugs.
2201 14. Changes to the "personal" filter test:
2203 (1) The test was buggy in that it was just doing the equivalent of
2204 "contains" tests on header lines. For example, if a user's address was
2205 anne@some.where, the "personal" test would incorrectly be true for
2207 To: susanne@some.where
2209 This test is now done by extracting each address from the header in turn,
2210 and checking the entire address. Other tests that are part of "personal"
2211 are now done using regular expressions (for example, to check local parts
2212 of addresses in From: header lines).
2214 (2) The list of non-personal local parts in From: addresses has been
2215 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2216 taken from the Sieve specification recommendations.
2218 (3) If the message contains any header line starting with "List-" it is
2219 treated as non-personal.
2221 (4) The test for "circular" in the Subject: header line has been removed
2222 because it now seems ill-conceived.
2224 15. Minor typos in src/EDITME comments corrected.
2226 16. Installed latest exipick from John Jetmore.
2228 17. If headers_add on a router specified a text string that was too long for
2229 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2230 of string_sprintf() is now avoided.
2232 18. $message_body_size was not set (it was always zero) when running the DATA
2233 ACL and the local_scan() function.
2235 19. For the "mail" command in an Exim filter, no default was being set for
2236 the once_repeat time, causing a random time value to be used if "once" was
2237 specified. (If the value happened to be <= 0, no repeat happened.) The
2238 default is now 0s, meaning "never repeat". The "vacation" command was OK
2239 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2240 (I found it when inspecting the code).
2242 20. There is now an overall timeout for performing a callout verification. It
2243 defaults to 4 times the callout timeout, which applies to individual SMTP
2244 commands during the callout. The overall timeout applies when there is more
2245 than one host that can be tried. The timeout is checked before trying the
2246 next host. This prevents very long delays if there are a large number of
2247 hosts and all are timing out (e.g. when the network connections are timing
2248 out). The value of the overall timeout can be changed by specifying an
2249 additional sub-option for "callout", called "maxwait". For example:
2251 verify = sender/callout=5s,maxwait=20s
2253 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2254 to the end before writing, but this should make it even safer).
2256 22. Exim was forgetting that it had advertised PIPELINING for the second and
2257 subsequent messages on an SMTP connection. It was also not resetting its
2258 memory on STARTTLS and an internal HELO.
2260 23. When Exim logs an SMTP synchronization error within a session, it now
2261 records whether PIPELINING has been advertised or not.
2263 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2264 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2265 rather than long int.
2267 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2269 26. Added the never_mail option to autoreply.
2275 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2276 crash if the getsockname() call failed; this can happen if a connection is
2277 closed very soon after it is established. The problem was simply in the
2278 order in which certain operations were done, causing Exim to try to write
2279 to the SMTP stream before it had set up the file descriptor. The bug has
2280 been fixed by making things happen in the correct order.
2286 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2287 before the connection was closed, thus losing the rejection response.
2289 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2290 some early Solaris releases, but causes trouble in current releases where
2291 socklen_t is defined.
2293 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2296 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2299 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2300 that releasing the top of it at the end releases what was used for sub-
2301 expansions (unless the block got too big). However, discard this block if
2302 the first thing is a variable or header, so that we can use its block when
2303 it is dynamic (useful for very large $message_headers, for example).
2305 6. Lookups now cache *every* query, not just the most recent. A new, separate
2306 store pool is used for this. It can be recovered when all lookup caches are
2307 flushed. Lookups now release memory at the end of their result strings.
2308 This has involved some general refactoring of the lookup sources.
2310 7. Some code has been added to the store_xxx() functions to reduce the amount
2311 of flapping under certain conditions.
2313 8. log_incoming_interface used to affect only the <= reception log lines. Now
2314 it causes the local interface and port to be added to several more SMTP log
2315 lines, for example "SMTP connection from", and rejection lines.
2317 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2319 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2321 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2322 could be overwritten at the end of the current message (or the start of a
2323 new message if it was set in a HELO ACL). The value is now preserved for
2324 the duration of the SMTP connection.
2326 12. If a transport had a headers_rewrite setting, and a matching header line
2327 contained an unqualified address, that address was qualified, even if it
2328 did not match any rewriting rules. The underlying bug was that the values
2329 of the flags that permit the existence of unqualified sender and recipient
2330 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2331 non-local messages, and by -bnq for local messages) were not being
2332 preserved with the message after it was received.
2334 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2335 "next input=" as part of the text comprising the host identity instead of
2336 the correct text. The code was using the same buffer for two different
2337 strings. However, depending on which order the printing function evaluated
2338 its arguments, the bug did not always show up. Under Linux, for example, my
2339 test suite worked just fine.
2341 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2342 doesn't work with some older versions of Perl. It has been changed to "my",
2343 which in any case is probably the better facility to use.
2345 15. A really picky compiler found some instances of statements for creating
2346 error messages that either had too many or two few arguments for the format
2349 16. The size of the buffer for calls to the DNS resolver has been increased
2350 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2351 for addresses that have a lot of PTR records. This alleviates a problem; it
2352 does not fully solve it.
2354 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2355 buffer now truncates the list and logs the incident, which is the same
2356 action as happens when Exim is looking up a host name and its aliases.
2357 Previously in this situation something unpredictable would happen;
2358 sometimes it was "internal error: store_reset failed".
2360 18. If a server dropped the connection unexpectedly when an Exim client was
2361 using GnuTLS and trying to read a response, the client delivery process
2362 crashed while trying to generate an error log message.
2364 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2365 string, for example:
2367 warn message = H1: something\nH2: something
2369 the text was added as a single header line from Exim's point of view
2370 though it ended up OK in the delivered message. However, searching for the
2371 second and subsequent header lines using $h_h2: did not work. This has been
2372 fixed. Similarly, if a system filter added multiple headers in this way,
2373 the routers could not see them.
2375 20. Expanded the error message when iplsearch is called with an invalid key to
2376 suggest using net-iplsearch in a host list.
2378 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2379 ACLs are no longer actually imposed (and a message to that effect is
2382 22. If a "gecos" field in a passwd entry contained escaped characters, in
2383 particular, if it contained a \" sequence, Exim got it wrong when building
2384 a From: or a Sender: header from that name. A second bug also caused
2385 incorrect handling when an unquoted " was present following a character
2386 that needed quoting.
2388 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2389 was not being matched caselessly.
2391 24. Arranged for all hyphens in the exim.8 source to be escaped with
2394 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2395 properly. Recipient callout cache records were still being keyed to include
2396 the sender, even when use_sender was set false. This led to far more
2397 callouts that were necessary. The sender is no longer included in the key
2398 when use_sender is false.
2400 26. Added "control = submission" modifier to ACLs.
2402 27. Added the ${base62d: operator to decode base 62 numbers.
2404 28. dnsdb lookups can now access SRV records.
2406 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2407 the configuration file.
2409 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2410 (-v) mode. This makes the output for a verbose queue run more intelligible.
2412 31. Added a use_postmaster feature to recipient callouts.
2414 32. Added the $body_zerocount variable, containing the number of binary zero
2415 bytes in the message body.
2417 33. The time of last modification of the "new" subdirectory is now used as the
2418 "mailbox time last read" when there is a quota error for a maildir
2421 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2423 35. Added +ignore_unknown as a special item in host lists.
2425 36. Code for decoding IPv6 addresses in host lists is now included, even if
2426 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2427 address was recognized as an IP address, but was then not correctly decoded
2428 into binary, causing unexpected and incorrect effects when compared with
2435 1. Very minor rewording of debugging text in manualroute to say "list of
2436 hosts" instead of "hostlist".
2438 2. If verify=header_syntax was set, and a header line with an unqualified
2439 address (no domain) and a large number of spaces between the end of the
2440 name and the colon was received, the reception process suffered a buffer
2441 overflow, and (when I tested it) crashed. This was caused by some obsolete
2442 code that should have been removed. The fix is to remove it!
2444 3. When running in the test harness, delay a bit after writing a bounce
2445 message to get a bit more predictability in the log output.
2447 4. Added a call to search_tidyup() just before forking a reception process. In
2448 theory, someone could use a lookup in the expansion of smtp_accept_max_
2449 per_host which, without the tidyup, could leave open a database connection.
2451 5. Added the variables $recipient_data and $sender_data which get set from a
2452 lookup success in an ACL "recipients" or "senders" condition, or a router
2453 "senders" option, similar to $domain_data and $local_part_data.
2455 6. Moved the writing of debug_print from before to after the "senders" test
2458 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2459 problems for message scanning, either using a data ACL, or using
2460 local_scan() because the Received: header was not generated till after they
2461 were called (in order to set the time as the time of reception completion).
2462 I have revised the way this works. The header is now generated after the
2463 body is received, but before the ACL or local_scan() are called. After they
2464 are run, the timestamp in the header is updated.
2470 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2471 before starting a queue runner without re-exec. This happened only when
2472 deliver_drop_privilege was set or when the Exim user was set to root. The
2473 effect of the bug was that timeouts during subsequent deliveries caused
2474 crashes instead of being properly handled. The handler is now left at its
2475 default (and expected) setting.
2477 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2478 message, again when deliver_drop_privilege is set or Exim is run as root.
2479 The bug described in (1) was not present in this case, but the tidying up
2480 of the other signals was missing. I have made the two cases consistent.
2482 3. The ignore_target_hosts setting on a manualroute router was being ignored
2483 for hosts that were looked up using the /MX notation.
2485 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2488 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2489 operated on the sender address. After changing the $sender_address to <>
2490 for the sender address verify, Exim was re-instated it as the original
2491 (before rewriting) address, but remembering that it had rewritten it, so it
2492 wasn't rewriting it again. This bug also had the effect of breaking the
2493 sender address verification caching when the sender address was rewritten.
2495 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2496 This has been changed so that if the ip literal address matches
2497 ignore_target_hosts, the router declines.
2499 7. Added expansion conditions match_domain, match_address, and match_local_
2500 part (NOT match_host).
2502 8. The placeholder for the Received: header didn't have a length field set.
2504 9. Added code to Exim itself and to exim_lock to test for a specific race
2505 condition that could lead to file corruption when using MBX delivery. The
2506 issue is with the lockfile that is created in /tmp. If this file is removed
2507 after a process has opened it but before that process has acquired a lock,
2508 there is the potential for a second process to recreate the file and also
2509 acquire a lock. This could lead to two Exim processes writing to the file
2510 at the same time. The added code performs the same test as UW imapd; it
2511 checks after acquiring the lock that its file descriptor still refers to
2512 the same named file.
2514 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2515 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2518 11. Added the smtp_active_hostname option. If used, this will typically be made
2519 to depend on the incoming interface address. Because $interface_address is
2520 not set up until the daemon has forked a reception process, error responses
2521 that can happen earlier (such as "too many connections") no longer contain
2524 12. If an expansion in a condition on a "warn" statement fails because a lookup
2525 defers, the "warn" statement is abandoned, and the next ACL statement is
2526 processed. Previously this caused the whole ACL to be aborted.
2528 13. Added the iplsearch lookup type.
2530 14. Added ident_timeout as a log selector.
2532 15. Added tls_certificate_verified as a log selector.
2534 16. Added a global option tls_require_ciphers (compare the smtp transport
2535 option of the same name). This controls incoming TLS connections.
2537 17. I finally figured out how to make tls_require_ciphers do a similar thing
2538 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2539 before starting the TLS session.
2541 18. Tabs are now shown as \t in -bP output.
2543 19. If the log selector return_path_on_delivery was set, Exim crashed when
2544 bouncing a message because it had too many Received: header lines.
2546 20. If two routers both had headers_remove settings, and the first one included
2547 a superfluous trailing colon, the final name in the first list and the
2548 first name in the second list were incorrectly joined into one item (with a
2549 colon in the middle).
2555 1. Added -C and -D options to the exinext utility, mainly to make it easier
2556 to include in the automated testing, but these could be helpful when
2557 multiple configurations are in use.
2559 2. The exinext utility was not formatting the output nicely when there was
2560 an alternate port involved in the retry record key, nor when there was a
2561 message id as well (for retries that were specific to a specific message
2562 and a specific host). It was also confused by IPv6 addresses, because of
2563 the additional colons they contain. I have fixed the IPv4 problem, and
2564 patched it up to do a reasonable job for IPv6.
2566 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2567 delivery, the log line now contains "pipelined" if PIPELINING was used.
2569 4. An SMTP transport process used to panic and die if the bind() call to set
2570 an explicit outgoing interface failed. This has been changed; it is now
2571 treated in the same way as a connect() failure.
2573 5. A reference to $sender_host_name in the part of a conditional expansion
2574 that was being skipped was still causing a DNS lookup. This no longer
2577 6. The def: expansion condition was not recognizing references to header lines
2578 that used bh_ and bheader_.
2580 7. Added the _cache feature to named lists.
2582 8. The code for checking quota_filecount in the appendfile transport was
2583 allowing one more file than it should have been.
2585 9. For compatibility with Sendmail, the command line option
2593 and sets the incoming protocol and host name (for trusted callers). The
2594 host name and its colon can be omitted when only the protocol is to be set.
2595 Note the Exim already has two private options, -pd and -ps, that refer to
2596 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2597 "s", but I don't think that's a major issue.
2599 10. A number of refactoring changes to the code, none of which should affect
2602 (a) The number of logging options was getting close to filling up the
2603 32-bit word that was used as a bit map. I have split them into two classes:
2604 those that are passed in the argument to log_write(), and those that are
2605 only ever tested independently outside of that function. These are now in
2606 separate 32-bit words, so there is plenty of room for expansion again.
2607 There is no change in the user interface or the logging behaviour.
2609 (b) When building, for example, log lines, the code previously used a
2610 macro that called string_cat() twice, in order to add two strings. This is
2611 not really sufficiently general. Furthermore, there was one instance where
2612 it was actually wrong because one of the argument was used twice, and in
2613 one call a function was used. (As it happened, calling the function twice
2614 did not affect the overall behaviour.) The macro has been replaced by a
2615 function that can join an arbitrary number of extra strings onto a growing
2618 (c) The code for expansion conditions now uses a table and a binary chop
2619 instead of a serial search (which was left over from when there were very
2620 few conditions). Also, it now recognizes conditions like "pam" even when
2621 the relevant support is not compiled in: a suitably worded error message is
2622 given if an attempt is made to use such a condition.
2624 11. Added ${time_interval:xxxxx}.
2626 12. A bug was causing one of the ddress fields not to be passed back correctly
2627 from remote delivery subprocesses. The field in question was not being
2628 subsequently used, so this caused to problems in practice.
2630 13. Added new log selectors queue_time and deliver_time.
2632 14. Might have fixed a bug in maildirsizefile handling that threw up
2633 "unexpected character" debug warnings, and recalculated the data
2634 unnecessarily. In any case, I expanded the warning message to give more
2637 15. Added the message "Restricted characters in address" to the statements in
2638 the default ACL that block characters like @ and % in local parts.
2640 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2641 Three changes have been made:
2643 (a) There was a serious bug; a negative response to MAIL caused the whole
2644 recipient domain to be cached as invalid, thereby blocking all messages
2645 to all local parts at the same domain, from all senders. This bug has
2646 been fixed. The domain is no longer cached after a negative response to
2647 MAIL if the sender used is not empty.
2649 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2652 (c) A new callout option, "use_sender" has been added for people who want
2653 the modified behaviour.
2659 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2662 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2663 indeed breaks things for older releases.
2665 3. Added additional logging to the case where there is a problem reading data
2666 from a filter that is running in a subprocess using a pipe, in order to
2667 try to track down a specific problem.
2669 4. Testing facility fudge: when running in the test harness and attempting
2670 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2671 getting "No route to host". Convert this to a timeout.
2673 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2676 6. Some OS don't have socklen_t but use size_t instead. This affects the
2677 fifth argument of getsockopt() amongst other things. This is now
2678 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2679 can be set for individual OS. I have set it for SunOS5, OSF1, and
2680 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2681 some earlier ones do not.
2683 7. Change 4.30/15 was not doing the test caselessly.
2685 8. The standard form for an IPv6 address literal was being rejected by address
2686 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2687 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2688 this, as well as the form without the "IPv6" on the front (but only when
2689 address literals are enabled, of course).
2691 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2693 10. Exim crashed if a message with an empty sender address specified by -f
2694 encountered a router with an errors_to setting. This could be provoked only
2695 by a command such as
2699 where an empty string was supplied; "<>" did not hit this bug.
2701 11. Installed PCRE release 4.5.
2703 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2704 remained set. It is now erased.
2706 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2707 times from message ids (which are base 36 rather than the normal 62).
2709 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2710 were being counted as actual protocol errors, and logged if the log
2711 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2712 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2713 and DATA following a set of rejected RCPTs do not count as protocol errors.
2714 In other words, Exim assumes they were pipelined, though this may not
2715 actually be the case. Of course, in all cases the client gets an
2716 appropriate error code.
2718 15. If a lookup fails in an ACL condition, a message about the failure may
2719 be available; it is used if testing the ACL cannot continue, because most
2720 such messages specify what the cause of the deferral is. However, some
2721 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2722 that caused an old message to be retained and used if a later statement
2723 caused a defer, replacing the real cause of the deferral.
2725 16. If an IP address had so many PTR records that the DNS lookup buffer
2726 was not large enough to hold them, Exim could crash while trying to process
2727 the truncated data. It now detects and logs this case.
2729 17. Further to 4.21/58, another change has been made: if (and only if) the
2730 first line of a message (the first header line) ends with CRLF, a bare LF
2731 in a subsequent header line has a space inserted after it, so as not to
2732 terminate the header.
2734 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2735 unnecessarily, used atoi() instead of strtol(), and didn't check the
2736 termination when getting file sizes from file names by regex.
2738 19. Completely re-implemented the support for maildirsize files, in the light
2739 of a number of problems with the previous contributed implementation
2740 (4.30/29). In particular:
2742 . If the quota is zero, the maildirsize file is maintained, but no quota is
2745 . If the maildir directory does not exist, it is created before any attempt
2746 to write a maildirsize file.
2748 . The quota value in the file is just a cache; if the quota is changed in
2749 the transport, the new value overrides.
2751 . A regular expression is available for excluding directories from the
2754 20. The autoreply transport checks the characters in options that define the
2755 message's headers; it allows continued headers, but it was checking with
2756 isspace() after an embedded newline instead of explicitly looking for a
2759 21. If all the "regular" hosts to which an address was routed had passed their
2760 expiry times, and had not reached their retry times, the address was
2761 bounced, even if fallback hosts were defined. Now Exim should go on to try
2764 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2765 equivalent code in the SMTP transport. Some hosts send humungous responses
2766 to HELO/EHLO, more than 1024 it seems.
2768 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2769 gives compiler warnings in some environments. I've now done it "properly",
2772 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2773 (because of problems with the built-in one) was declared to return uschar *
2774 instead of char *, causing compiler failure.
2776 25. Fixed a file descriptor leak when processing alias/forward files.
2778 26. Fixed a minor format string issue in dbfn.c.
2780 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2782 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2783 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2786 29. When a sender address is verified, it is cached, to save repeating the test
2787 when there is more than one recipient in a message. However, when the
2788 verification involves a callout, it is possible for different callout
2789 options to be set for different recipients. It is too complicated to keep
2790 track of this in the cache, so now Exim always runs a verification when a
2791 callout is required, relying on the callout cache for the optimization.
2792 The overhead is duplication of the address routing, but this should not be
2795 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2796 to be verified with callout=postmaster, and the main callout worked but the
2797 postmaster check failed, the verification correctly failed. However, if a
2798 subsequent RCPT command asked for sender verification *without* the
2799 postmaster check, incorrect caching caused this verification also to fail,
2802 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2803 it was not caching the DNS options (qualify_single, search_parents) that
2804 were used when the lookup failed. A subsequent lookup with different
2805 options therefore always gave the same answer, though there were cases
2806 where it should not have. (Example: a "domains = !$mx_any" option on a
2807 dnslookup router: the "domains" option is always processed without any
2808 widening, but the router might have qualify_single set.) Now Exim uses the
2809 cached value only when the same options are set.
2811 32. Added John Jetmore's "exipick" utility to the distribution.
2813 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2814 than a timeout (e.g. a certificate is required, and is not provided), an
2815 Exim server now closes the connection immediately. Previously it waited for
2816 the client to close - but if the client is SSL, it seems that they each
2817 wait for each other, leading to a delay before one of them times out.
2819 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2820 maintained 0.8.x compatibility because I don't think many are using it, and
2821 it is clearly obsolete.
2823 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2826 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2827 client certificate was expired. A simple patch fixes this, though I don't
2828 understand the full logic of why the verify callback is called multiple
2831 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2832 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2833 which causes problems with some clients (such as the Certicom SSL Plus
2834 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2835 disables the coutermeasure allowing Eudora to connect."
2837 38. Exim was not checking that a write() to a log file succeeded. This could
2838 lead to Bad Things if a log got too big, in particular if it hit a file
2839 size limit. Exim now panics and dies if it cannot write to a log file, just
2840 as it does if it cannot open a log file.
2842 39. Modified OS/Makefile-Linux so that it now contains
2844 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2846 The two -D definitions ensure that Exim is compiled with large file
2847 support, which makes it possible to handle log files that are bigger than
2850 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2851 instance) a domain was checked against a named list that involved a lookup,
2852 causing $domain_data to be set, then another domain was checked against the
2853 same list, then the first domain was re-checked, the value of $domain_data
2854 after the final check could be wrong. In particular, if the second check
2855 failed, it could be set empty. This bug probably also applied to
2858 41. The strip_trailing_dot option was not being applied to the address given
2859 with the -f command-line option.
2861 42. The code for reading a message's header from the spool was incrementing
2862 $received_count, but never initializing it. This meant that the value was
2863 incorrect (doubled) while delivering a message in the same process in which
2864 it was received. In the most common configuration of Exim, this never
2865 happens - a fresh exec is done - but it can happen when
2866 deliver_drop_privilege is set.
2868 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2869 it now includes up to 150 characters of the unexpected data in the log
2872 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2873 and building data strings. The size of both of these buffers was 10 000
2874 bytes - far larger than anybody would *ever* want, thought I. Needless to
2875 say, somebody hit the limit. I have increased the maximum line length to
2876 20 000 and the maximum data length of concatenated lines to 100 000. I have
2877 also fixed two bugs, because there was no checking on these buffers. Tsk,
2878 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2879 buffer is too small.
2881 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2882 lsearch lookups. Now it does.
2884 46. When parsing a route_list item in a manualroute router, a fixed-length
2885 buffer was used for the list of hosts. I made this 1024 bytes long,
2886 thinking that nobody would ever have a list of hosts that long. Wrong.
2887 Somebody had a whole pile of complicated expansion conditions, and the
2888 string was silently truncated, leading to an expansion error. It turns out
2889 that it is easier to change to an unlimited length (owing to other changes
2890 that have happened since this code was originally written) than to build
2891 structure for giving a limitation error. The length of the item that
2892 expands into the list of hosts is now unlimited.
2894 47. The lsearch lookup could not handle data where the length of text line was
2895 more than 4095 characters. Such lines were truncated, leading to shortened
2896 data being returned. It should now handle lines of any length.
2898 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2899 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2902 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2903 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2904 no longer happens in comment lines. A list of replacements is now placed
2905 at the head of all of the source files, except those whose only change is
2906 to replace PERL_COMMAND in the very first #! line.
2908 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2909 messages on the queue, with a bottom-up merge sort, using code contributed
2910 by Michael Haardt. This should make operations like -bp somewhat faster on
2911 large queues. It won't affect queue runners, except when queue_run_in_order
2914 51. Installed eximstats 1.31 in the distribution.
2916 52. Added support for SRV lookups to the dnslookup router.
2918 53. If an ACL referred to $message_body or $message_body_end, the value was not
2919 reset for any messages that followed in the same SMTP session.
2921 54. The store-handling optimization for building very long strings was not
2922 differentiating between the different store pools. I don't think this
2923 actually made any difference in practice, but I've tidied it.
2925 55. While running the routers to verify a sender address, $sender_address
2926 was still set to the sender address. This is wrong, because when routing to
2927 send a bounce to the sender, it would be empty. Therefore, I have changed
2928 it so that, while verifying a sender address, $sender_address is set to <>.
2929 (There is no change to what happens when verifying a recipient address.)
2931 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2932 target A or AAAA records (if not already returned) without resetting the
2933 qualify_single or search_parents options of the DNS resolver. These are
2934 inappropriate in this case because the targets of MX and SRV records must
2935 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2936 target that, when qualified, matched something in the local domain. These
2937 two options are now turned off when doing these lookups.
2939 57. It seems that at least some releases of Reiserfs (which does not have the
2940 concept of a fixed number of inodes) returns zero and not -1 for the
2941 number of available inodes. This interacted badly with check_spool_inodes,
2942 which assumed that -1 was the "no such thing" setting. What I have done is
2943 to check that the total number of inodes is greater than zero before doing
2944 the test of how many are available.
2946 58. When a "warn" ACL statement has a log_message modifier, the message is
2947 remembered, and not repeated. This is to avoid a lot of repetition when a
2948 message has many recipients that cause the same warning to be written.
2949 Howewer, Exim was preserving the list of already written lines for an
2950 entire SMTP session, which doesn't seem right. The memory is now reset if a
2951 new message is started.
2953 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2954 debugging output unless log_rewrite was also set.
2956 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2957 of (int)(handle) when we know that handle contains (void *)(-1).
2959 61. The Exim daemon panic-logs an error return when it closes the incoming
2960 connection. However "connection reset by peer" seems to be common, and
2961 isn't really an error worthy of noting specially, so that particular error
2964 62. When Exim is trying to find all the local interfaces, it used to panic and
2965 die if the ioctl to get the interface flags failed. However, it seems that
2966 on at least one OS (Solaris 9) it is possible to have an interface that is
2967 included in the list of interfaces, but for which you get a failure error
2968 for this call. This happens when the interface is not "plumbed" into a
2969 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2970 failure of the "get flags" call assumes that the interface is down.
2972 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2973 makes life easier for people who are doing arithmetic on fields extracted
2974 from dates, where you often get leading zeros that should not be
2975 interpreted as octal.
2977 64. Added qualify_domain to the redirect router, to override the global
2980 65. If a pathologically long header line contained very many addresses (the
2981 report of this problem mentioned 10 000) and each of them was rewritten,
2982 Exim could use up a very large amount of memory. (It kept on making new
2983 copies of the header line as it rewrote, and never released the old ones.)
2984 At the expense of a bit more processing, the header rewriting function has
2985 been changed so that it no longer eats memory in this way.
2987 66. The generation of the Received: header has been moved from the time that a
2988 message starts to be received, to the time that it finishes. The timestamp
2989 in the Received: header should now be very close to that of the <= log
2990 line. There are two side-effects of this change:
2992 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2993 logged header lines no longer include the local Received: line, because
2994 it has not yet been created. The same applies to a copy of the message
2995 that is returned to a non-SMTP sender when a message is rejected.
2997 (b) When a filter file is tested using -bf, no additional Received: header
2998 is added to the test message. After some thought, I decided that this
3001 This change does not affect the value of $received_for. It is still set
3002 after address rewriting, but before local_scan() is called.
3004 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3006 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3007 gave an unhelpful panic error message, and a defer error. I have managed to
3008 change this behaviour so that it now rejects any supplied certificate,
3009 which seems right, as the list of acceptable certificates is empty.
3011 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3012 gave an unhelpful defer error. I have not managed to make this reject any
3013 supplied certificates, but the error message it gives is "no certificate
3014 supplied", which is not helpful.
3016 70. exigrep's output now also includes lines that are not associated with any
3017 message, but which match the given pattern. Implemented by a patch from
3018 Martin Sluka, which also tidied up the Perl a bit.
3020 71. Recipient callout verification, like sender verification, was using <> in
3021 the MAIL FROM command. This isn't really the right thing, since the actual
3022 sender may affect whether the remote host accepts the recipient or not. I
3023 have changed it to use the actual sender in the callout; this means that
3024 the cache record is now keyed on a recipient/sender pair, not just the
3025 recipient address. There doesn't seem to be a real danger of callout loops,
3026 since a callout by the remote host to check the sender would use <>.
3027 [SEE ABOVE: changed after hitting problems.]
3029 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3030 temporary errors. However, in the case of such a code being given after
3031 the end of a data transmission (i.e. after ".") Exim was failing to write
3032 a retry record for the message. (Yes, there was some broken host that was
3033 actually sending 8xx at this point.)
3035 73. An unknown lookup type in a host list could cause Exim to panic-die when
3036 the list was checked. (An example that provoked this was putting <; in the
3037 middle of a list instead of at the start.) If this happened during a DATA
3038 ACL check, a -D file could be left lying around. This kind of configuration
3039 error no longer causes Exim to die; instead it causes a defer errror. The
3040 incident is still logged to the main and panic logs.
3042 74. Buglet left over from Exim 3 conversion. The message "too many messages
3043 in one connection" was written to the rejectlog but not the mainlog, except
3044 when address rewriting (yes!) was being logged.
3046 75. Added write_rejectlog option.
3048 76. When a system filter was run not as root (that is, when system_filter_user
3049 was set), the values of the $n variables were not being returned to the
3050 main process; thus, they were not subsequently available in the $sn
3053 77. Added +return_path_on_delivery log selector.
3055 78. A connection timeout was being treated differently from recipients deferred
3056 when testing hosts_max_try with a message that was older than the host's
3057 retry timeout. (The host should not be counted, thus allowing all hosts to
3058 be tried at least once before bouncing.) This may have been the cause of an
3059 occasionally reported bug whereby a message would remain on the queue
3060 longer than the retry timeout, but would be bounced if a delivery was
3061 forced. I say "may" because I never totally pinned down the problem;
3062 setting up timeout/retry tests is difficult. See also the next item.
3064 79. The ultimate address timeout was not being applied to errors that involved
3065 a combination of host plus message (for example, a timeout on a MAIL
3066 command). When an address resolved to a number of possible hosts, and they
3067 were not all tried for each delivery (e.g. because of hosts_max_try), a
3068 message could remain on the queue longer than the retry timeout.
3070 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3073 81. Fixed an obscure SMTP outgoing bug which required at least the following
3074 conditions: (a) there was another message waiting for the same server;
3075 (b) the server returned 5xx to all RCPT commands in the first message so
3076 that the message was not completed; (c) the server dropped the connection
3077 or gave a negative response to the RSET that Exim sends to abort the
3078 transaction. The observed case was a dropped connection after DATA that had
3079 been sent in pipelining mode. That is, the server had advertised PIPELINING
3080 but was not implementing it correctly. The effect of the bug was incorrect
3081 behaviour, such as trying another host, and this could lead to a crash.
3087 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3088 and daemon.c were passed as pointers to ints; they should have been
3089 pointers to socklen_t variables (which are typically unsigned ints).
3091 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3094 3. Fixed a really odd bug that affected only the testing scheme; patching a
3095 certain fixed string in the binary changed the value of another string that
3096 happened to be identical to the end of the original first string.
3098 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3099 name", it returns that address as the IP address. On some operating
3100 systems (e.g. Solaris), it also passes back the IP address string as the
3101 "host name". However, on others (e.g. Linux), it passes back an empty
3102 string. Exim wasn't checking for this, and was changing the host name to an
3103 empty string, assuming it had been canonicized.
3105 5. Although rare, it is permitted to have more than one PTR record for a given
3106 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3107 all the names associated with an address, because they do in Solaris.
3108 However, it seems that they do not in Linux for data that comes from the
3109 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3110 I found this out when I moved to a new Linux workstation and tried to run
3111 the Exim test suite.
3113 To get round this problem I have changed the code so that it now does its
3114 own call to the DNS to look up PTR records when searching for a host name.
3115 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3116 addresses that are only in /etc/hosts are still found.
3118 This behaviour is, however, controlled by an option called host_lookup_
3119 order, which defaults to "bydns:byaddr". If people want to use the other
3120 order, or indeed, just use one or the other means of lookup, they can
3121 specify it in this variable.
3123 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3124 some operating systems, this comes back from gethostbyaddr() as an empty
3125 string, and this is what Exim used to test for. However, it seems that in
3126 other systems, "." is yielded. Exim now tests for this case too.
3128 7. The values of check_spool_space and check_log_space are now held internally
3129 as a number of kilobytes instead of an absolute number of bytes. If a
3130 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3131 kilobyte. This means that much larger values can be stored.
3133 8. Exim monitor: an attempt to get the action menu when not actually pointing
3134 at a message produces an empty menu entitled "No message selected". This
3135 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3136 no entries in it ("Shell widget menu has zero width and/or height"). So I
3137 have added a single, blank menu entry in this case.
3139 9. Added ${quote_local_part.
3141 10. MIME decoding is now applied to the contents of Subject: header lines when
3144 11. Now that a reference to $sender_host_address automatically causes a reverse
3145 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3146 host lookup before query-style lookups in lists that might use this
3147 variable. This has therefore been abolished, and the "net-" prefix is no
3148 longer necessary for query-style lookups.
3150 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3151 have been a typo for LFLAGS, so it has been changed.
3153 13. The install script calls Exim with "-C /dev/null" in order to find the
3154 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3155 to be output. Howeve, since Exim outputs its version number before the
3156 error, it didn't break the script. It just looked ugly. I fixed this by
3157 always allowing "-C /dev/null" if the caller is root.
3159 14. Ignore overlarge ACL variable number when reading spool file - insurance
3160 against a later release with more variables having written the file.
3162 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3163 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3164 this, as well as the form without the "IPv6" on the front.
3166 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3167 OS/Makefile-Darwin file.
3169 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3170 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3172 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3173 variable. However, some OS use ints for inodes. I've added cast to long int
3174 to get rid of the compiler warning.
3176 19. I had forgotten to lock out "/../" in configuration file names when
3177 ALT_CONFIG_PREFIX was set.
3179 20. Routers used for verification do not need to specify transports. However,
3180 if such a router generated a host list, and callout was configured, Exim
3181 crashed, because it could not find a port number from the (non-existent)
3182 transport. It now assumes port 25 in this circumstance.
3184 21. Added the -t option to exigrep.
3186 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3187 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3188 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3189 them is set, LOOKUP_LSEARCH is forced.
3191 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3193 24. Added sender and host information to the "rejected by local_scan()" log
3194 line; previously there was no indication of these.
3196 25. Added .include_if_exists.
3198 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3199 Linux. It turns out that not all file systems support this. Apparently some
3200 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3201 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3202 not supported on the file descriptor, is now ignored when Exim is trying to
3203 sync a directory. This applies only to Linux.
3205 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3207 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3208 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3211 29. Added support for maildirsize files from supplied patch (modified a bit).
3213 30. The use of :fail: followed by an empty string could lead Exim to respond to
3214 sender verification failures with (e.g.):
3216 550 Verification failed for <xxx>
3217 550 Sender verify failed
3219 where the first response line was missing the '-' that indicates it is not
3220 the final line of the response.
3222 31. The loop for finding the name of the user that called Exim had a hardwired
3223 limit of 10; it now uses the value of finduser_retries, which is used for
3224 all other user lookups.
3226 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3229 33. Exim was neglecting to zero errno before one call of strtol() when
3230 expanding a string and expecting an integer value. On some systems this
3231 resulted in spurious "integer overflow" errors. Also, it was casting the
3232 result into an int without checking.
3234 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3235 did not work. The code looks as if it has *never* worked, though it appears
3236 to have been documented since at least releast 1.62. I have made it work.
3238 35. The "timeout_DNS" error in retry rules, also documented since at least
3239 1.62, also never worked. As it isn't clear exactly what this means, and
3240 clearly it isn't a major issue, I have abolished the feature by treating it
3241 as "timeout", and writing a warning to the main and panic logs.
3243 36. The display of retry rules for -brt wasn't always showing the error code
3246 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3247 timeout_connect_A, timeout_connect_MX.
3249 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3250 to the empty sender.
3252 39. The daemon was not analysing the content of -oX till after it had closed
3253 stderr and disconnected from the controlling terminal. This meant that any
3254 syntax errors were only noted on the panic log, and the return code from
3255 the command was 0. By re-arranging the code a little, I've made the
3256 decoding happen first, so such errors now appear on stderr, and the return
3257 code is 1. However, the actual setting up of the sockets still happens in
3258 the disconnected process, so errors there are still only recorded on the
3261 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3262 connections (as happens on some IP stacks) was logged at start up time as
3263 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3264 it from "IPv6 and IPv4", which means that two separate sockets are being
3267 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3268 says whether AF_INET or AF_INET6 was passed as an argument.
3270 42. Exiwhat output was messed up when time zones were included in log
3273 43. Exiwhat now gives more information about the daemon's listening ports,
3274 and whether -tls-on-connect was used.
3276 44. The "port" option of the smtp transport is now expanded.
3278 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3279 silently ignored. Now an error message is written to the main and panic
3282 46. There's a new ACL modifier called "logwrite" which writes to a log file
3283 as soon as it is encountered.
3285 47. Added $local_user_uid and $local_user_gid at routing time.
3287 48. Exim crashed when trying to verify a sender address that was being
3290 49. Exim was recognizing only a space character after ".include". It now also
3291 recognizes a tab character.
3293 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3294 extracting the relevant information from the specification. The man page no
3295 longer contains scrambled data for the -d option, and I've added a section
3296 at the front about calling Exim under different names.
3298 51. Added "extra_headers" argument to the "mail" command in filter files.
3300 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3303 53. Installed eximstats 1.29.
3305 54. Added transport_filter_timeout as a generic transport option.
3307 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3308 Cc: header lines. This was required by RFC 822, but it not required by RFC
3311 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3312 incoming messages that did not have them. Now it does so only if the
3313 message originates locally, that is, if there is no associated remote host
3314 address. When Resent- header lines are present, this applies to the Resent-
3315 lines rather than the non-Resent- lines.
3317 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3318 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3320 58. Messages for configuration errors now include the name of the main
3321 configuration file - useful now that there may be more than one file in a
3322 list (.included file names were always shown).
3324 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3325 for those rare installations that do not start the daemon as root or run it
3326 setuid root. I've cut out the call to initgroups() if the daemon is not
3329 60. The Exim user and group can now be bound into the binary as text strings
3330 that are looked up at the start of Exim's processing.
3332 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3334 62. Added $mailstore_basename variable.
3336 63. Installed patch to sieve.c from Michael Haardt.
3338 64. When Exim failed to open the panic log after failing to open the main log,
3339 the original message it was trying to log was written to stderr and debug
3340 output, but if they were not available (the usual case in production), it
3341 was lost. Now it is written to syslog before the two lines that record the
3342 failures to open the logs.
3344 65. Users' Exim filters run in subprocesses under the user's uid. It is
3345 possible for a "deliver" command or an alias in a "personal" command to
3346 provoke an address rewrite. If logging of address rewriting is configured,
3347 this fails because the process is not running as root or exim. There may be
3348 a better way of dealing with this, but for the moment (because 4.30 needs
3349 to be released), I have disabled address rewrite logging when running a
3350 filter in a non-root, non-exim process.
3356 1. The buildconfig auxiliary program wasn't quoting the value set for
3357 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3358 not defined. This bug was masked in 4.22 by the effect that was fixed in
3361 2. Some messages that were rejected after a message id was allocated were
3362 shown as "incomplete" by exigrep. It no longer does this for messages that
3363 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3365 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3366 have allow_domain_literals set, the ID did not get logged in the <= line.
3367 Domain literals are now always recognized in Message-ID: header lines.
3369 4. The first argument for a ${extract expansion item is the key name or field
3370 number. Leading and trailing spaces in this item were not being ignored,
3371 causing some misleading effects.
3373 5. When deliver_drop_privilege was set, single queue runner processes started
3374 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3375 same command in the process it spins off) were not dropping privilege.
3377 6. When the daemon running as "exim" started a queue runner, it always
3378 re-executed Exim in the spun-off process. This is a waste of effort when
3379 deliver_drop_privilege is set. The new process now just calls the
3380 queue-runner function directly.
3386 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3389 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3390 ignored. Though the use of -oP was forcing the writing of a pid file, it
3391 was always written to the default place.
3393 3. If the message "no IP address found for host xxxx" is generated during
3394 incoming verification, it is now followed by identification of the incoming
3395 connection (so you can more easily find what provoked it).
3397 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3399 5. Added some features to "harden" Exim a bit more against certain attacks:
3401 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3402 be put in Local/Makefile. This is like the never_users runtime option,
3403 but it cannot be overridden. The default setting is "root".
3405 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3406 prefix string with which any file named in a -C command line option
3409 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3410 is retained for -C and -D only if the caller of Exim is root. Without
3411 it, the exim user may also use -C and -D and retain privilege.
3413 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3414 command line option is disabled.
3416 6. Macro names set by the -D option must start with an upper case letter, just
3417 like macro names defined in the configuration file.
3419 7. Added "dereference=" facility to LDAP.
3421 8. Two instances of the typo "uknown" in the source files are fixed.
3423 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3424 the Configure-Makefile script screwed up while processing it.
3426 10. Incorporated PCRE 4.4.
3428 11. The SMTP synchronization check was not operating right at the start of an
3429 SMTP session. For example, it could not catch a HELO sent before the client
3430 waited for the greeting. There is now a check for outstanding input at the
3431 point when the greeting is written. Because of the duplex, asynchronous
3432 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3433 way, but not yet received, when the check is performed.
3435 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3436 on TCP/IP sockets, because this apparently causes some broken clients to
3439 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3440 unchanged) from the Cygwin maintainer.
3442 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3443 was supported instead of testing for mbx. Effectively a typo.
3445 15. The spa authenticator server code was not checking that the input it
3446 received was valid base64.
3448 16. The debug output line for the "set" modifier in ACLs was not showing the
3449 name of the variable that was being set.
3451 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3453 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3454 lookup on its own. Something else was needed to trigger the lookup. For
3455 example, a match in host_lookup or the need for a host name in a host list.
3456 Now, if $sender_host_name is referenced and the host name has not yet been
3457 looked up, a lookup is performed. If the lookup fails, the variable remains
3458 empty, and $host_lookup_failed is set to "1".
3460 19. Added "eqi" as a case-independent comparison operator.
3462 20. The saslauthd authentication condition could segfault if neither service
3463 nor realm was specified.
3465 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3466 error message that was logged was misleading, and incoming SMTP
3467 connections were dropped. The message is now more accurate, and temporary
3468 errors are given to SMTP connections.
3470 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3471 (except RSET) with a 421 error, until QUIT is received. However, it was
3472 failing to send a response to QUIT.
3474 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3475 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3476 ACL is now run after the helo_try_verify_hosts code.
3478 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3479 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3480 case-independent, so other case variants are also recognized). Apparently
3481 some systems use these upper case variants.
3483 25. If more than two messages were waiting for the same host, and a transport
3484 filter was specified for the transport, Exim sent two messages over the
3485 same TCP/IP connection, and then failed with "socket operation on non-
3486 socket" when it tried to send the third.
3488 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3490 27. The extern definition of crypt16() in expand.c was not being excluded when
3491 the OS had its own crypt16() function.
3493 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3494 as a preferred synonym for return_size_limit, both as an option and as an
3497 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3499 30. Changed the default configuration ACL to relax the local part checking rule
3500 for addresses that are not in any local domains. For these addresses,
3501 slashes and pipe symbols are allowed within local parts, but the sequence
3502 /../ is explicitly forbidden.
3504 31. SPA server authentication was not clearing the challenge buffer before
3507 32. log_message in a "warn" ACL statement was writing to the reject log as
3508 well as to the main log, which contradicts the documentation and doesn't
3509 seem right (because no rejection is happening). So I have stopped it.
3511 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3512 However, I am unable to do any testing of this.
3514 34. Fixed an infelicity in the appendfile transport. When checking directories
3515 for a mailbox, to see if any needed to be created, it was accidentally
3516 using path names with one or more superfluous leading slashes; tracing
3517 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3519 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3520 contents are added to the log line that is written for every discarded
3521 recipient. (Previously a log_message setting was ignored.)
3523 36. The ${quote: operator now quotes the string if it is empty.
3525 37. The install script runs exim in order to find its version number. If for
3526 some reason other than non-existence or emptiness, which it checks, it
3527 could not run './exim', it was installing it with an empty version number,
3528 i.e. as "exim-". This error state is now caught, and the installation is
3531 38. An argument was missing from the function that creates an error message
3532 when Exim fails to connect to the socket for saslauthd authentication.
3533 This could cause Exim to crash, or give a corrupted message.
3535 39. Added isip, isip4, and isip6 to ${if conditions.
3537 40. The ACL variables $acl_xx are now saved with the message, and can be
3538 accessed later in routers, transports, and filters.
3540 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3541 strings in the file are not string-expanded.
3543 42. If a MAIL command specified a SIZE value that was too large to fit into an
3544 int variable, the check against message_size_limit failed. Such values are
3545 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3546 day this will have to be increased, but I don't think I want to be around
3547 when emails are that large.
3554 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3555 iconv() is not standard in FreeBSD.
3557 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3558 IPv6 enabled. The observed symptom was a segmentation fault on return from
3559 the function os_common_find_running_interfaces() in src/os.c.
3561 3. In the check_special_case() function in daemon.c I had used "errno" as an
3562 argument name, which causes warnings on some systems. This was basically a
3563 typo, since it was named "eno" in the comments!
3565 4. The code that waits for the clock to tick (at a resolution of some fraction
3566 of a second) so as to ensure message-id uniqueness was always waiting for
3567 at least one whole tick, when it could have waited for less. [This is
3568 almost certainly not relevant at current processor speeds, where it is
3569 unlikely to ever wait at all. But we try to future-proof.]
3571 5. The function that sleeps for a time interval that includes fractions of a
3572 second contained a race. It did not block SIGALRM between setting the
3573 timer, and suspending (a couple of lines later). If the interval was short
3574 and the sigsuspend() was delayed until after it had expired, the suspension
3575 never ended. On busy systems this could lead to processes getting stuck for
3578 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3579 process, before it forks any delivery processes. The open lookup caching
3580 mechanism meant that the open file or database connection was passed into
3581 the delivery process. The problem was that delivery processes always tidy
3582 up cached lookup data. This could cause a problem for the next delivery
3583 process started by the queue runner, because the external queue runner
3584 process does not know about the closure. So the next delivery process
3585 still has data in the lookup cache. In the case of a file lookup, there was
3586 no problem because closing a file descriptor in a subprocess doesn't affect
3587 the parent. However, if the lookup was caching a connection to a database,
3588 the connection was closed, and the second delivery process was likely to
3589 see errors such as "PGSQL: query failed: server closed the connection
3590 unexpectedly". The problem has been fixed by closing all cached lookups
3591 in a queue runner before running a delivery process.
3593 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3594 seem to have the "const" qualifier which it has on other OS. I've
3597 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3598 *of the same type* (client or server) with the same public name that an
3599 error should be diagnosed.
3601 9. When Exim looked up a host name for an IP address, but failed to find the
3602 original IP address when looking up the host name (a safety check), it
3603 output the message "<ip address> does not match any IP for NULL", which was
3604 confusing, to say the least. The bug was that the host name should have
3605 appeared instead of "NULL".
3607 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3608 user that is built into the binary, and the -C or -D options is used, root
3609 privilege is dropped before the configuration file is read. In addition,
3610 logging is switched to stderr instead of the normal log files. If the
3611 configuration then re-defines the Exim user, the unprivileged environment
3612 is probably not what is expected, so Exim logs a panic warning message (but
3615 However, if deliver_drop_privilege is set, the unprivileged state may well
3616 be exactly what is intended, so the warning has been cut out in that case,
3617 and Exim is allowed to try to write to its normal log files.
3623 1. smtp_return_error_details was not giving details for temporary sender
3624 or receiver verification errors.
3626 2. Diagnose a configuration error if two authenticators have the same public
3629 3. Exim used not to create the message log file for a message until the first
3630 delivery attempt. This could be confusing when incoming messages were held
3631 for policy or load reasons. The message log file is now created at the time
3632 the message is received, and an initial "Received" line is written to it.
3634 4. The automatically generated man page for command line options had a minor
3635 bug that caused no ill effects; however, a more serious problem was that
3636 the procedure for building the man page automatically didn't always
3637 operate. Consequently, release 4.20 contains an out-of-date version. This
3638 shouldn't happen again.
3640 5. When building Exim with embedded Perl support, the script that builds the
3641 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3642 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3644 6. The freeze_tell option was not being used for messages that were frozen on
3645 arrival, either by an ACL or by local_scan().
3647 7. Added the smtp_incomplete_transaction log selector.
3649 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3650 was accepting AUTH without a new EHLO.
3652 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3653 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3656 10. Logging of TCP/IP connections (when configured) now happens in the main
3657 daemon process instead of the child process, so that the TCP/IP connection
3658 count is more accurate (but it can never be perfect).
3660 11. The use of "drop" in a nested ACL was not being handled correctly in the
3661 outer ACL. Now, if condition failure induced by the nested "drop" causes
3662 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3663 or "require"), the connection is dropped.
3665 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3666 that yield "discard" can now be used with an "accept" or a "discard" verb,
3667 but an error is generated for any others (because I can't see a useful way
3668 to define what should happen).
3670 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3671 are now processed in the same way as lines in the Exim configuration file.
3672 In particular, continuation lines are supported.
3674 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3676 15. Added -ti meaning -t -i.
3678 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3679 domains, and warn by logging if others are found.
3681 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3682 returned from GIFCONF when Exim is trying to find the list of interfaces on
3683 a host. The code in os.c has been modified to copy each ifreq to an aligned
3684 structure in all cases.
3686 Also, in some cases, the returned ifreq's were being copied to a 'struct
3687 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3688 means the last couple of bytes of an IPv6 address could be chopped if the
3689 ifreq contained only a normal sockaddr (14 bytes storage).
3691 18. Named domain lists were not supported in the hosts_treat_as_local option.
3692 An entry such as +xxxx was not recognized, and was treated as a literal
3695 19. Ensure that header lines added by a DATA ACL are included in the reject log
3696 if the ACL subsequently rejects the message.
3698 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3699 MD5 (which is deprecated).
3701 21. When testing a filter file using -bf, Exim was writing a message when it
3702 took the sender from a "From " line in the message, but it was not doing so
3703 when it took $return_path from a Return-Path: header line. It now does.
3705 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3706 with a valid header line field name (a series of printing characters
3707 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3709 23. Changed "disc" in the source to "disk" to conform to the documentation and
3710 the book and for uniformity.
3712 24. Ignore Sendmail's -Ooption=value command line item.
3714 25. When execve() failed while trying to run a command in a pipe transport,
3715 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3716 could be confused with a return value of 69 from the command itself. This
3717 has been changed to 127, the value the shell returns if it is asked to run
3718 a non-existent command. The wording for the related log line suggests a
3719 non-existent command as the problem.
3721 26. If received_header_text expands to an empty string, do not add a Received:
3722 header line to the message. (Well, it adds a token one on the spool, but
3723 marks it "old" so that it doesn't get used or transmitted.)
3725 27. Installed eximstats 1.28 (addition of -nt option).
3727 28. There was no check for failure on the call to getsockname() in the daemon
3728 code. This can fail if there is a shortage of resources on the system, with
3729 ENOMEM, for example. A temporary error is now given on failure.
3731 29. Contrary to the C standard, it seems that in some environments, the
3732 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3733 program. Exim now does this explicitly; it affects the formatting of
3734 timestamps using strftime().
3736 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3737 complaints. I've now initialized all the variables, to avoid this.
3739 32. Header lines added by a system filter were not being "seen" during
3740 transport-time rewrites.
3742 33. The info_callback() function passed to OpenSSL is set up with type void
3743 (*)(SSL *, int, int), as described somewhere. However, when calling the
3744 function (actually a macro) that sets it up, the type void(*)() is
3745 expected. I've put in a cast to prevent warnings from picky compilers.
3747 34. If a DNS black list lookup found a CNAME record, but there were no A
3748 records associated with the domain it pointed at, Exim crashed.
3750 35. If a DNS black list lookup returned more than one A record, Exim ignored
3751 all but the first. It now scans all returned addresses if a particular IP
3752 value is being sought. In this situation, the contents of the
3753 $dnslist_value variable are a list of all the addresses, separated by a
3756 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3757 to accept a host name and all its aliases if the forward lookup for any of
3758 them yielded the IP address of the incoming connection. Now it accepts only
3759 those names whose forward lookup yields the correct IP address. Any other
3760 names are discarded. This closes a loophole whereby a rogue DNS
3761 administrator could create reverse DNS records to break through a
3762 wildcarded host restriction in an ACL.
3764 37. If a user filter or a system filter that ran in a subprocess used any of
3765 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3766 the wrong values were passed to the pipe command ($thisaddress had the
3767 value of $0, $0 had the value of $1, etc). This bug was introduced by
3768 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3770 38. Improved the line breaking for long SMTP error messages from ACLs.
3771 Previously, if there was no break point between 40 and 75 characters, Exim
3772 left the rest of the message alone. Two changes have been made: (a) I've
3773 reduced the minimum length to 35 characters; (b) if it can't find a break
3774 point between 35 and 75 characters, it looks ahead and uses the first one
3775 that it finds. This may give the occasional overlong line, but at least the
3776 remaining text gets split now.
3778 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3779 file descriptors might be low, and that setting 1000 would always raise it.
3780 It turns out that in some environments, the limit is already over 1000 and
3781 that lowering it causes trouble. So now Exim takes care not to decrease it.
3783 40. When delivering a message, the value of $return_path is set to $sender_
3784 address at the start of routing (routers may change the value). By an
3785 oversight, this default was not being set up when an address was tested by
3786 -bt or -bv, which affected the outcome if any router or filter referred to
3789 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3790 log only when "message" or "log_message" are set. However, if one of the
3791 conditions was an address verification, or a call to a nested ACL, the
3792 messages generated by the underlying test were being passed through. This
3793 no longer happens. The underlying message is available in $acl_verify_
3794 message for both "message" and "log_message" expansions, so it can be
3795 passed through if needed.
3797 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3798 new expansion $bh_ to give the encoded byte string without charset
3799 translation. Translation happens only if iconv() is available; HAVE_ICONV
3800 indicates this at build time. HEADERS_CHARSET gives the charset to
3801 translate to; headers_charset can change it in the configuration, and
3802 "headers charset" can change it in an individual filter file.
3804 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3805 that creates RFC 2047 encoded "words" labels them as that charset instead
3806 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3807 expansion operator; (ii) when Exim creates a From: line for a local
3808 message; (iii) when a header line is rewritten to include a "phrase" part.
3810 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3811 buggy, causing it to skip the first lines of messages whose message ID
3812 ended in 'D'. This would not have bitten before Exim release 4.14, because
3813 message IDs were unlikely to end in 'D' before then. The effect was to have
3814 incorrect size information for certain domains.
3816 45. #include "config.h" was missing at the start of the crypt16.c module. This
3817 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3820 46. If there was a timeout during a "random" callout check, Exim treated it as
3821 a failure of the random address, and carried on sending RSET and the real
3822 address. If the delay was just some slowness somewhere, the response to the
3823 original RCPT would be taken as a response to RSET and so on, causing
3824 mayhem of various kinds.
3826 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3827 when I implemented it. It didn't allow for the fact that some option values
3828 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3829 the right test for positive values.
3831 48. Domain names in DNS records are case-independent. Exim always looks them up
3832 in lower case. Some resolvers return domain names in exactly the case they
3833 appear in the zone file, that is, they may contain uppercase letters. Not
3834 all resolvers do this - some return always lower case. Exim was treating a
3835 change of case by a resolver as a change of domain, similar to a widening
3836 of a domain abbreviation. This triggered its re-routing code and so it was
3837 trying to route what was effectively the same domain again. This normally
3838 caused routing to fail (because the router wouldn't handle the domain
3839 twice). Now Exim checks for this case specially, and just changes the
3840 casing of the domain that it ultimately uses when it transmits the message
3843 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3846 50. If a filter generated a file delivery with a non-absolute name (possible if
3847 no home directory exists for the router), the forbid_file option was not
3850 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3851 the existing equality matching.
3853 52. Exim was using ints instead of ino_t variables in some places where it was
3854 dealing with inode numbers.
3856 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3857 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3858 called TMPDIR, and if it finds it is different, it changes its value.
3860 54. The smtp_printf() function is now made available to local_scan() so
3861 additional output lines can be written before returning. There is also an
3862 smtp_fflush() function to enable the detection of a dropped connection.
3863 The variables smtp_input and smtp_batched_input are exported to
3866 55. Changed the default runtime configuration: the message "Unknown user"
3867 has been removed from the ACL, and instead placed on the localuser router,
3868 using the cannot_route_message feature. This means that any verification
3869 failures that generate their own messages won't get overridden. Similarly,
3870 the "Unrouteable address" message that was in the ACL for unverifiable
3871 relay addresses has also been removed.
3873 56. Added hosts_avoid_esmtp to the smtp transport.
3875 57. The exicyclog script was not checking for the esoteric option
3876 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3877 will work only if exicyclog is run under the appropriate euid.
3879 58. Following a discussion on the list, the rules by which Exim recognises line
3880 endings on incoming messages have been changed. The -dropcr and drop_cr
3881 options are now no-ops, retained only for backwards compatibility. The
3882 following line terminators are recognized: LF CRLF CR. However, special
3883 processing applies to CR:
3885 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3886 nor a local message in the state where . is a terminator.
3888 (ii) If a bare CR is encountered in a header line, an extra space is added
3889 after the line terminator so as not to end the header. The reasoning
3890 behind this is that bare CRs in header lines are most likely either
3891 to be mistakes, or people trying to play silly games.
3893 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3894 was being incorrectly given as 18 bytes larger than it should have been.
3895 This is a VOB (very old bug).
3897 60. This may never have affected anything current, but just in case it has:
3898 When the local host is found other than at the start of a list of hosts,
3899 the local host, those with the same MX, and any that follow, are discarded.
3900 When the list in question was part of a longer list of hosts, the following
3901 hosts (not currently being processed) were also being discarded. This no
3902 longer happens. I'm not sure if this situation could ever has previously
3905 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3908 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3909 header. This is something that is recommended in a new Internet Draft, and
3910 is something that is documented as being done by Sendmail. There are two
3911 possible values. For messages generated by the autoreply transport, Exim
3914 Auto-Submitted: auto-replied
3916 whereas for all other generated messages (e.g. bounces) it adds
3918 Auto-Submitted: auto-generated
3920 63. The "personal" condition in filters now includes a test for the
3921 Auto-Submitted: header. If it contains the string "auto-" the message it
3922 not considered personal.
3924 64. Added rcpt_include_affixes as a generic transport option.
3926 65. Added queue_only_override (default true).
3928 66. Added the syslog_duplication option.
3930 67. If what should have been the first header line of a message consisted of
3931 a space followed by a colon, Exim was mis-interpreting it as a header line.
3932 It isn't of course - it is syntactically invalid and should therefore be
3933 treated as the start of the message body. The misbehaviour could have
3934 caused a number of strange effects, including loss of data in subsequent
3935 header lines, and spool format errors.
3937 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3938 client host had authenticated. This control can now be exercised by an ACL
3939 for more flexibility.
3941 69. By default, callouts do not happen when testing with -bh. There is now a
3942 variant, -bhc, which does actually run the callout code, including
3943 consulting and updating the callout cache.
3945 70. Added support for saslauthd authentication, courtesy of Alexander
3948 71. If statvfs() failed on the spool or log directories while checking their
3949 size for availability, Exim confusingly gave the error "space shortage".
3950 Furthermore, in debugging mode it crashed with a floating point exception.
3951 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3952 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3953 serious problem, Exim now writes to the main and panic logs when this
3954 happens, with details of the failure. It then refuses to accept the
3955 incoming message, giving the message "spool directory problem" or "log
3956 directory problem" with a 421 code for SMTP messages.
3958 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3959 0, 1, and 2 exist, because some OS complain for execs without them (see
3960 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3961 descriptors. However, the code omitted to check that the open succeeded,
3962 causing mysterious errors if for some reason the permissions on /dev/null
3963 got screwed. Now Exim writes a message to the main and panic logs, and
3964 bombs out if it can't open /dev/null.
3966 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3967 interact so that it is all more flexible. It is supposed to remain
3968 backwards compatible. Also added extra_local_interfaces.
3970 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3971 to bomb out with an assertion failure - to the client this appears as a
3972 connection drop. This problem occurs in the part of the code that was taken
3973 from the Samba project. Fortunately, the assertion is in a very simple
3974 function, so I have fixed this by reproducing the function inline in the
3975 one place where it is called, and arranging for authentication to fail
3976 instead of killing the process with assert().
3978 75. The SPA client code was not working when the server requested OEM rather
3979 than Unicode encoding.
3981 76. Added code to make require_files with a specific uid setting more usable in
3982 the case where statting the file as root fails - usually a non-root-mounted
3983 NFS file system. When this happens and the failure is EACCES, Exim now
3984 forks a subprocess and does the per-uid checking as the relevant uid.
3986 77. Added process_log_path.
3988 78. If log_file_path was not explicitly set, a setting of check_log_space or
3989 check_log_inodes was ignored.
3991 79. If a space check for the spool or log partitions fails, the incident is now
3992 logged. Of course, in the latter case the data may get lost...
3994 80. Added the %p formatting code to string_format() so that it can be used to
3995 print addresses in debug_print(). Adjusted all the address printing in the
3996 debugging in store.c to use %p rather than %d.
3998 81. There was a concern that a line of code in smtp_in.c could overflow a
3999 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4000 initially expressed, the concern was not well-founded, because trailing
4001 spaces are removed early. However, if the trailing spaces were followed by
4002 a NULL, they did not get removed, so the overflow was possible. Two fixes
4005 (a) I re-wrote the offending code in a cleaner fashion.
4006 (b) If an incoming SMTP command contains a NULL character, it is rejected
4009 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4010 runs initgroups(), so that if the Exim user is in any additional groups,
4011 they will be used during message reception.
4017 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob