1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.361 2006/06/27 15:38:07 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.
42 PH/02 Add the verb name to the "unknown ACL verb" error.
44 PH/03 Magnus Holmgren's patch for filter_prepend_home.
46 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
48 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
49 directory not expanded when it should be if an expanded home directory
50 was set for the address (which is overridden by the transport).
56 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
57 other effects) broke the use of negated acl sub-conditions.
59 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
62 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
63 "Deny" causes Exim to reject the incoming connection with a 554 error.
64 Unfortunately, if there is a major crisis, such as a disk failure,
65 tcp-wrappers gives "deny", whereas what one would like would be some
66 kind of temporary error. A kludge has been added to help with this.
67 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
68 554 error is used if errno is still zero or contains ENOENT (which occurs
69 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
72 PH/03 Add -lutil to the default FreeBSD LIBS setting.
74 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
75 errors. Otherwise a message that provokes a temporary error (when other
76 messages do not) can cause a whole host to time out.
78 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
79 addresses were routed directly to files or pipes from a redirect router.
80 File deliveries just didn't batch; pipe deliveries might have suffered
83 PH/06 A failure to get a lock for a hints database would erroneously always say
84 "Failed to get write lock", even when it was really a read lock.
86 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
87 of 0600. This has been changed to use the value of the lockfile_mode
88 option (which defaults to 0600).
90 PH/08 Applied small patch from the Sieve maintainer.
92 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
93 folder from quota calculations, a direct delivery into this folder messed
94 up the contents of the maildirsize file. This was because the regex was
95 used only to exclude .Trash (or whatever) when the size of the mailbox
96 was calculated. There was no check that a delivery was happening into an
97 excluded directory. This bug has been fixed by ignoring all quota
98 processing for deliveries into excluded directories.
100 PH/10 Added the maildirfolder_create_regex option to appendfile.
106 PH/01 The code for finding all the local interface addresses on a FreeBSD
107 system running IPv6 was broken. This may well have applied to all BSD
108 systems, as well as to others that have similar system calls. The broken
109 code found IPv4 interfaces correctly, but gave incorrect values for the
110 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
111 that it would not match correctly against @[] and not recognize the IPv6
114 PH/02 The ipliteral router was not recognizing addresses of the form user@
115 [ipv6:....] because it didn't know about the "ipv6:" prefix.
117 PH/03 Added disable_ipv6.
119 PH/04 Changed $reply_address to use the raw form of the headers instead of the
120 decoded form, because it is most often used to construct To: headers
121 lines in autoreplies, and the decoded form may well be syntactically
122 invalid. However, $reply_address has leading white space removed, and all
123 newlines turned into spaces so that the autoreply transport does not
126 PH/05 If group was specified without a user on a router, and no group or user
127 was specified on a transport, the group from the router was ignored.
129 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
130 for visible compile-time settings that can be used to change these
131 numbers, for those that want even more. Backwards compatibility with old
132 spool files has been maintained. However, going back to a previous Exim
133 release will lost any variables that are in spool files.
135 PH/07 Two small changes when running in the test harness: increase delay when
136 passing a TCP/IP connection to a new process, in case the original
137 process has to generate a bounce, and remove special handling of
138 127.0.0.2 (sic), which is no longer necessary.
140 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
141 be the same on different OS.
143 PH/09 Moved a debug statement in filter processing to avoid a race problem when
146 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
147 whether --show-vars was specified or not
149 JJ/02 exipick: Added support for new ACL variable spool format introduced
152 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
153 syntactically invalid From: or Reply-to: line, and a filter used this to
154 generate an autoreply, and therefore failed to obtain an address for the
155 autoreply, Exim could try to deliver to a non-existent relative file
156 name, causing unrelated and misleading errors. What now happens is that
157 it logs this as a hard delivery error, but does not attempt to create a
160 PH/11 The exinext utility has a -C option for testing purposes, but although
161 the given file was scanned by exinext itself; it wasn't being passed on
162 when Exim was called.
164 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
165 an end-of-file indication when reading a command response.
167 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
168 compiled. In many other places in Exim, IPv6 addresses are always
169 recognized, so I have changed this. It also means that IPv4 domain
170 literals of the form [IPV4:n.n.n.n] are now always recognized.
172 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
173 used if the router is not running as root, for example, when verifying at
174 ACL time, or when using -bh. The debugging output from this situation was
175 non-existent - all you got was a failure to exec. I have made two
178 (a) Failures to set uid/gid, the current directory, or a process leader
179 in a subprocess such as that created by queryprogram now generate
180 suitable debugging ouput when -d is set.
182 (b) The queryprogram router detects when it is not running as root,
183 outputs suitable debugging information if -d is set, and then runs
184 the subprocess without attempting to change uid/gid.
186 PH/15 Minor change to Makefile for building test_host (undocumented testing
189 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
190 additional section of a DNS packet that returns MX or SRV records.
191 Instead, it always explicitly searches for A/AAAA records. This avoids
192 major problems that occur when a DNS server includes only records of one
193 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
194 fixed another bug: if SRV records were looked up and the corresponding
195 address records were *not* found in the additional section, the port
196 values from the SRV records were lost.
198 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
199 using the correct key (the original address) when searching the retry
200 rules in order to find which one to use for generating the retry hint.
202 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
203 adding the default one. Similarly, if it contains a Reply-To: header, the
204 errors_reply_to option, if set, is not used.
206 PH/19 When calculating a retry time, Exim used to measure the "time since
207 failure" by looking at the "first failed" field in the retry record. Now
208 it does not use this if it is later than than the arrival time of the
209 message. Instead it uses the arrival time. This makes for better
210 behaviour in cases where some deliveries succeed, thus re-setting the
211 "first failed" field. An example is a quota failure for a huge message
212 when small messages continue to be delivered. Without this change, the
213 "time since failure" will always be short, possible causing more frequent
214 delivery attempts for the huge message than are intended.
215 [Note: This change was subsequently modified - see PH/04 for 4.62.]
217 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
218 $1, $2, $3) because the numerical variables can be reset during some
219 expansion items (e.g. "match"), thereby losing the authentication data.
221 PH/21 Make -bV show the size of off_t variables so that the test suite can
222 decide whether to run tests for quotas > 2G.
224 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
225 mailbox_size, and mailbox_filecount in the appendfile transport. If a
226 filecount value is greater than 2G or if a quota value is greater than 2G
227 on a system where the size of off_t is not greater than 4, a panic error
230 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
231 never match. The debug and -bh output now contains an explicit error
232 message indicating a malformed IPv4 address or mask.
234 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
235 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
238 PH/25 Do not write to syslog when running in the test harness. The only
239 occasion when this arises is a failure to open the main or panic logs
240 (for which there is an explicit test).
242 PH/26 Added the /no_tell option to "control=freeze".
244 PH/27 If a host name lookup failed very early in a connection, for example, if
245 the IP address matched host_lookup and the reverse lookup yielded a name
246 that did not have a forward lookup, an error message of the form "no IP
247 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
248 could be logged. Now it outputs the IP address instead of "NULL".
250 PH/28 An enabling patch from MH: add new function child_open_exim2() which
251 allows the sender and the authenticated sender to be set when
252 submitting a message from within Exim. Since child_open_exim() is
253 documented for local_scan(), the new function should be too.
255 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
256 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
257 results in an empty string is now treated as unset.
259 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
261 PH/31 Added sender_verify_fail logging option.
263 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
264 needed by RFC 822 but not by RFC 2822 was commented out. I have now
265 tidied the source and removed it altogether.
267 PH/33 When a queue run was abandoned because the load average was too high, a
268 log line was always written; now it is written only if the queue_run log
269 selector is set. In addition, the log line for abandonment now contains
270 information about the queue run such as the pid. This is always present
271 in "start" and "stop" lines but was omitted from the "abandon" line.
273 PH/34 Omit spaces between a header name and the colon in the error message that
274 is given when verify = headers_syntax fails (if there are lots of them,
275 the message gets confusing).
277 PH/35 Change the default for dns_check_names_pattern to allow slashes within
278 names, as there are now some PTR records that contain slashes. This check
279 is only to protect against broken name servers that fall over on strange
280 characters, so the fact that it applies to all lookups doesn't matter.
282 PH/36 Now that the new test suite is complete, we can remove some of the
283 special code in Exim that was needed for the old test suite. For example,
284 sorting DNS records because real resolvers return them in an arbitrary
285 order. The new test suite's fake resolver always returns records in the
288 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
289 bounces) except when queue_only is set, to avoid logging races between
290 the different processes.
292 PH/38 Panic-die if .include specifies a non-absolute path.
294 PH/39 A tweak to the "H" retry rule from its user.
296 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
297 a label. They prevented compilation on older perls.
299 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
300 a warning to be raised on newish perls.
302 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
303 on queue. Changes to match documented behaviour of showing count of
304 messages matching specified criteria.
306 PH/40 Changed the default ident timeout from 30s to 5s.
308 PH/41 Added support for the use of login_cap features, on those BSD systems
309 that have them, for controlling the resources used by pipe deliveries.
311 PH/42 The content-scanning code uses fopen() to create files in which to put
312 message data. Previously it was not paying any attention to the mode of
313 the files. Exim runs with umask(0) because the rest of the code creates
314 files with open(), and sets the required mode explicitly. Thus, these
315 files were ending up world-writeable. This was not a big issue, because,
316 being within the spool directory, they were not world-accessible. I have
317 created a function called modefopen, which takes an additional mode
318 argument. It sets umask(777), creates the file, chmods it to the required
319 mode, then resets the umask. All the relevant calls to fopen() in the
320 content scanning code have been changed to use this function.
322 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
323 to 24 hours. This avoids potential overflow problems when processing G
324 and H retry rules. I suspect nobody ever tinkers with this value.
326 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
328 PH/45 When the plaintext authenticator is running as a client, the server's
329 challenges are checked to ensure they are valid base64 strings. By
330 default, the authentication attempt is cancelled if an invalid string is
331 received. Setting client_ignore_invalid_base64 true ignores these errors.
332 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
333 they are received. Thus, the responses can be made to depend on the
334 challenges. If an invalid string is ignored, an empty string is placed in
337 PH/46 Messages that are created by the autoreply transport now contains a
338 References: header, in accordance with RFCs 2822 and 3834.
340 PH/47 Added authenticated_sender_force to the smtp transport.
342 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
344 PH/49 Installed latest patch from the Sieve maintainer.
346 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
347 was also set, the appendfile transport was unnecessarily scanning a
348 directory of message files (e.g. for maildir delivery) to find the count
349 of files (along with the size), even though it did not need this
350 information. It now does the scan only if it needs to find either the
351 size of the count of files.
353 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
355 PH/52 Two bugs concerned with error handling when the smtp transport is
358 (i) Exim was not creating retry information for temporary errors given
359 for individual recipients after the DATA command when the smtp transport
360 was used in LMTP mode. This meant that they could be retried too
361 frequently, and not timed out correctly.
363 (ii) Exim was setting the flag that allows error details to be returned
364 for LMTP errors on RCPT commands, but not for LMTP errors for individual
365 recipients that were returned after the DATA command.
367 PH/53 This is related to PH/52, but is more general: for any failing address,
368 when detailed error information was permitted to be returned to the
369 sender, but the error was temporary, then after the final timeout, only
370 "retry timeout exceeded" was returned. Now it returns the full error as
371 well as "retry timeout exceeded".
373 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
374 do this, and (what is worse) MTAs that accept it.
376 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
377 will now be deprecated.
379 PH/56 New os.c-cygwin from the Cygwin maintainer.
381 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
382 formats (previously only available in exim formats via -bpr, -bpru,
383 and -bpra. Now also available in native and exiqgrep formats)
385 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
386 with very large, slow to parse queues
388 JJ/08 exipick: added ! as generic prefix to negate any criteria format
390 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
392 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
393 responses to authentication challenges, though it was showing the
394 challenges; (ii) I've removed the CR characters from the debug output for
397 PH/58 Allow for the insertion of a newline as well as a space when a string
398 is turned into more than one encoded-word during RFC 2047 encoding. The
399 Sieve code now uses this.
401 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
402 data_4xx, lost_connection, tls_required.
404 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
405 message was being sent as an SMTP response.
407 PH/61 Add -l and -k options to exicyclog.
409 PH/62 When verifying, if an address was redirected to one new address, so that
410 verification continued, and the new address failed or deferred after
411 having set something in $address_data, the value of $address_data was not
412 passed back to the ACL. This was different to the case when no
413 redirection occurred. The value is now passed back in both cases.
415 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
416 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
417 use login_cap.h, so on its own it isn't the distinguishing feature. The
418 new name refers directly to the setclassresources() function.
420 PH/65 Added configuration files for NetBSD3.
422 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
424 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
425 is preferred over IPv4.
427 PH/68 The bounce_return_message and bounce_return_body options were not being
428 honoured for bounces generated during the reception of non-SMTP messages.
429 In particular, this applied to messages rejected by the ACL. This bug has
430 been fixed. However, if bounce_return_message is true and bounce_return_
431 body is false, the headers that are returned for a non-SMTP message
432 include only those that have been read before the error was detected.
433 (In the case of an ACL rejection, they have all been read.)
435 PH/69 The HTML version of the specification is now built in a directory called
436 spec_html instead of spec.html, because the latter looks like a path with
437 a MIME-type, and this confuses some software.
439 PH/70 Catch two compiler warnings in sieve.c.
441 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
442 function verify_get_ident() calls ip_connect() to connect a socket, but
443 if the "connect()" function timed out, ip_connect() used to close the
444 socket. However, verify_get_ident() also closes the socket later, and in
445 between Exim writes to the log, which may get opened at this point. When
446 the socket was closed in ip_connect(), the log could get the same file
447 descriptor number as the socket. This naturally causes chaos. The fix is
448 not to close the socket in ip_connect(); the socket should be closed by
449 the function that creates it. There was only one place in the code where
450 this was missing, in the iplookup router, which I don't think anybody now
451 uses, but I've fixed it anyway.
453 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
454 well as to direct DNS lookups. Otherwise the handling of names in host
455 lists is inconsistent and therefore confusing.
461 PH/01 Two changes to the default runtime configuration:
463 (1) Move the checks for relay_from_hosts and authenticated clients from
464 after to before the (commented out) DNS black list checks.
466 (2) Add control=submission to the relay_from_hosts and authenticated
467 clients checks, on the grounds that messages accepted by these
468 statements are most likely to be submissions.
470 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
472 (1) Generate an error if the third argument for the ${prvs expansion is
475 (2) Treat a missing third argument of ${prvscheck as if it were an empty
478 (3) Reset the variables that are obtained from the first argument of
479 ${prvscheck and used in the second argument before leaving the code,
480 because their memory is reclaimed, so using them afterwards may do
483 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
484 one (it's much easier than Tom thought :-).
486 (5) Because of (4), we can now allow for the use of $prvscheck_result
487 inside the third argument.
489 PH/03 For some reason, the default setting of PATH when running a command from
490 a pipe transport was just "/usr/bin". I have changed it to
493 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
494 anything to be listed in the output from -bV.
496 PH/05 When a filter generated an autoreply, the entire To: header line was
497 quoted in the delivery log line, like this:
499 => >A.N.Other <ano@some.domain> <original@ddress> ...
501 This has been changed so that it extracts the operative address. There
502 may be more than one such address. If so, they are comma-separated, like
505 => >ano@some.domain,ona@other.domain <original@ddress> ...
507 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
508 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
509 not being looked up in the rDNS to get a host name, Exim was showing the
510 IP address twice in Received: lines, even though the IP addresses were
511 identical. For example:
513 Received: from [1.2.3.4] (helo=[1.2.3.4])
515 However, if the real host name was known, it was omitting the HELO data
516 if it matched the actual IP address. This has been tidied up so that it
517 doesn't show the same IP address twice.
519 PH/07 When both +timestamp and +memory debugging was on, the value given by
520 $tod_xxx expansions could be wrong, because the tod_stamp() function was
521 called by the debug printing, thereby overwriting the timestamp buffer.
522 Debugging no longer uses the tod_stamp() function when +timestamp is set.
524 PH/08 When the original message was included in an autoreply transport, it
525 always said "this is a copy of the message, including all the headers",
526 even if body_only or headers_only was set. It now gives an appropriate
529 PH/09 Applied a patch from the Sieve maintainer which:
531 o fixes some comments
532 o adds the (disabled) notify extension core
533 o adds some debug output for the result of if/elsif tests
534 o points to the current vacation draft in the documentation
535 and documents the missing references header update
539 o fixes a bug in processing the envelope test (when testing
540 multiple envelope elements, the last element determinted the
543 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
544 Electronic Mail") by including:
546 Auto-submitted: auto-generated
548 in the messages that it generates (bounce messages and others, such as
549 warnings). In the case of bounce messages for non-SMTP mesages, there was
550 also a typo: it was using "Auto_submitted" (underscore instead of
551 hyphen). Since every message generated by Exim is necessarily in response
552 to another message, thes have all been changed to:
554 Auto-Submitted: auto-replied
556 in accordance with these statements in the RFC:
558 The auto-replied keyword:
560 - SHOULD be used on messages sent in direct response to another
561 message by an automatic process,
563 - MUST NOT be used on manually-generated messages,
565 - MAY be used on Delivery Status Notifications (DSNs) and Message
566 Disposition Notifications (MDNs),
568 - MUST NOT be used on messages generated by automatic or periodic
569 processes, except for messages which are automatic responses to
572 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
573 to the default Received: header definition.
575 PH/12 Added log selector acl_warn_skipped (default on).
577 PH/13 After a successful wildlsearch lookup, discard the values of numeric
578 variables because (a) they are in the wrong storage pool and (b) even if
579 they were copied, it wouldn't work properly because of the caching.
581 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
582 checking when decoding. Apparently there are clients that generate
583 overlong encoded strings. Why am I not surprised?
585 PH/15 If the first argument of "${if match_address" was not empty, but did not
586 contain an "@" character, Exim crashed. Now it writes a panic log message
587 and treats the condition as false.
589 PH/16 In autoreply, treat an empty string for "once" the same as unset.
591 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
592 extension "envelope-auth". The code is finished and in agreement with
593 other implementations, but there is no documentation so far and in fact,
594 nobody wrote the draft yet. This extension is currently #undef'ed, thus
595 not changing the active code.
597 Print executed "if" and "elsif" statements when debugging is used. This
598 helps a great deal to understand what a filter does.
600 Document more things not specified clearly in RFC3028. I had all this
601 sorted out, when out of a sudden new issues came to my mind. Oops."
603 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
606 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
607 canonical form (as documented). However, after a host name lookup from
608 the IP address, check_host() was doing a simple string comparison with
609 addresses acquired from the DNS when checking that the found name did
610 have the original IP as one of its addresses. Since any found IPv6
611 addresses are likely to be in abbreviated form, the comparison could
612 fail. Luckily, there already exists a function for doing the comparison
613 by converting both addresses to binary, so now that is used instead of
616 PH/20 There was another similar case to PH/19, when a complete host name was
617 given in a host list; looking up its IP address could give an abbreviated
618 form, whereas the current host's name might or might not be abbreviated.
619 The same fix has been applied.
625 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
626 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
629 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
630 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
632 PH/03 Typo: missing ".o" in src/pcre/Makefile.
634 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
635 header line, restrict the check to what is listed in RFCs 2369 and 2929.
636 Also, for "Auto-Submitted", treat anything other than "no" as
637 non-personal, in accordance with RFC 3834. (Previously it treated
638 anything starting "auto-" as non-personal.)
640 TF/01 The control=submission/name=... option had a problem with syntax
641 errors if the name included a slash character. The /name= option
642 now slurps the rest of the string, so it can include any characters
643 but it must come last in the list of options (after /sender_retain
646 PH/05 Some modifications to the interface to the fake nameserver for the new
654 TK/01 Added the "success_on_redirect" address verification option. See
655 NewStuff for rationale and an example.
657 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
659 PH/02 Patch to exigrep to allow it to work on syslog lines.
661 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
662 fread() to skip over the body file's header line, because in Cygwin the
663 header line is locked and is inaccessible.
665 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
666 co-exist for some time) to make it clear that it is the Exim ID that is
667 referenced, not the Message-ID: header line.
669 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
670 string_format() function, because snprintf() does not exist on all
673 PH/06 The use of forbid_filter_existstest now also locks out the use of the
674 ${stat: expansion item.
676 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
677 protocol synchronization error", to keep the pedants happy.
679 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
680 well as for IRIX systems, when gcc is being used. See the host.c source
683 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
685 PH/10 Named domain lists were not working if used in a queue_smtp_domains
688 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
689 transport and to the smtp transport in LMTP mode.
691 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
693 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
694 run a filter in a subprocess. This could lead to confusion in subsequent
695 lookups in the parent process. There should also be a search_tidyup() at
696 the end of the subprocess.
698 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
699 only if the host matched helo_try_verify_hosts, which caused the
700 verification to occur when the EHLO/HELO command was issued. The ACL just
701 tested the remembered result. Now, if a previous verification attempt has
702 not happened, "verify = helo" does it there and then.
704 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
706 TK/03 Fix log output including CR from clamd.
708 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
709 exist provoked a memory error which could cause a segfault.
711 PH/15 Installed PCRE 6.2
713 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
715 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
716 of the problem. Specifically, suggested +O2 rather than +O1 for the
719 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
721 PH/20 If a delivery was routed to a non-standard port by means of an SRV
722 record, the port was not correctly logged when the outgoing_port log
723 selector was set (it logged the transort's default port).
725 PH/21 Added support for host-specific ports to manualroute, queryprogram,
726 fallback_hosts, and "hosts" in the smtp transport.
728 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
729 host errors such as "Connection refused".
731 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
732 authentication with radiusclient 0.4.9:
734 - Error returned from rc_read_config was caught wrongly
735 - Username/password not passed on to radius server due to wrong length.
737 The presumption is that some radiusclient API changes for 4.51/PH/17
738 were not taken care of correctly. The code is still untested by me (my
739 Linux distribution still has 0.3.2 of radiusclient), but it was
740 contributed by a Radius user.
742 PH/24 When doing a callout, the value of $domain wasn't set correctly when
743 expanding the "port" option of the smtp transport.
745 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
746 while reading a MIME header. Thanks to Tom Hughes for a patch.
748 PH/24 Include config.h inside local_scan.h so that configuration settings are
751 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
752 that in an ACL for RCPT (for example), you can examine exactly what was
755 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
756 commands, but it was not correctly comparing the address with the actual
757 client host address. Thus, it would show the EHLO address in Received:
758 header lines when this was not necessary.
760 PH/27 Added the % operator to ${eval:}.
762 PH/28 Exim tries to create and chdir to its spool directory when it starts;
763 it should be ignoring failures (because with -C, for example, it has lost
764 privilege). It wasn't ignoring creation failures other than "already
767 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
770 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
771 because an input line was too long, either on its own, or by virtue of
772 too many continuations, the temporary file was not being removed, and the
773 return code was incorrect.
775 PH/31 Missing "BOOL" in function definition in filtertest.c.
777 PH/32 Applied Sieve patches from the maintainer.
779 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
781 PH/33 Added "verify = not_blind".
783 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
784 Local/Makefile (with some defaults set). These are used in built scripts
785 such as exicyclog, but they have never been used in the exim_install
786 script (though there are many overriding facilities there). I have
787 arranged that the exim_install script now takes note of these two
790 PH/35 Installed configuration files for Dragonfly.
792 PH/36 When a locally submitted message by a trusted user did not contain a
793 From: header, and the sender address was obtained from -f or from an SMTP
794 MAIL command, and the trusted user did not use -F to supply a sender
795 name, $originator_name was incorrectly used when constructing a From:
796 header. Furthermore, $originator_name was used for submission mode
797 messages from external hosts without From: headers in a similar way,
798 which is clearly wrong.
800 PH/37 Added control=suppress_local_fixups.
802 PH/38 When log_selector = +received_sender was set, and the addition of the
803 sender made the log line's construction buffer exactly full, or one byte
804 less than full, an overflow happened when the terminating "\n" was
807 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
808 when the result of a list match is failure because a DNS lookup failed.
810 PH/40 RM_COMMAND is now used in the building process.
812 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
813 the "build-* directories that it finds.
815 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
816 address in a domain literal was a prefix of an interface address.
818 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
819 when verifying a sender address, unless rewrite_headers is false.
821 PH/44 Wrote a long comment about why errors_to addresses are verified as
822 recipients, not senders.
824 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
825 the ratelimit ACL was added.
827 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
829 PH/46 Added extra information about PostgreSQL errors to the error string.
831 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
832 avoiding the need to install special zones in a real server. This is
833 backwards compatible; if it can't find the fake resolver, it drops back.
834 Thus, both old and new test suites can be run.
836 TF/02 Added util/ratelimit.pl
838 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
839 clock is set back in time.
841 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
842 Candler <B.Candler@pobox.com>.
844 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
845 OK for addresses that are the result of redirections.
847 PH/48 A number of further additions for the benefit of the new test suite,
848 including a fake gethostbyname() that interfaces to the fake DNS resolver
851 TF/06 The fix for widen_domains has also been applied to qualify_single and
852 search_parents which are the other dnslookup options that can cause
855 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
858 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
860 TF/07 Exim produced the error message "an SRV record indicated no SMTP
861 service" if it encountered an MX record with an empty target hostname.
862 The message is now "an MX or SRV record indicated no SMTP service".
864 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
865 if the DNS of the sending site is misconfigured. This is quite a
866 common situation. This change restores the behaviour of treating a
867 helo verification defer as a failure.
869 PH/51 If self=fail was set on a router, the bounce message did not include the
870 actual error message.
876 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
878 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
879 command itself ended in error, the underlying message about the transport
880 filter timeout was being overwritten with the pipe command error. Now the
881 underlying error message should be appended to the second error message.
883 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
885 PH/02 Reduce the amount of output that "make" produces by default. Full output
886 can still be requested.
888 PH/03 The warning log line about a condition test deferring for a "warn" verb
889 was being output only once per connection, rather than after each
890 occurrence (because it was using the same function as for successful
891 "warn" verbs). This seems wrong, so I have changed it.
893 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
894 it should not have, which might have caused a crash in the right
895 circumstances, but probably never did.
897 PH/04 Installed a modified version of Tony Finch's patch to make submission
898 mode fix the return path as well as the Sender: header line, and to
899 add a /name= option so that you can make the user's friendly name appear
902 TF/03 Added the control = fakedefer ACL modifier.
904 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
905 Mark Lowes for thorough testing.
907 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
909 TK/03 Merged latest SRS patch from Miles Wilton.
911 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
912 with the definition in sysexits.h (which is #included earlier).
913 Fortunately, Exim does not actually use EX_OK. The code used to try to
914 preserve the sysexits.h value, by assumimg that macro definitions were
915 scanned for macro replacements. I have been disabused of this notion,
916 so now the code just undefines EX_OK before #including unistd.h.
918 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
919 in the smtp transport. When a block could not be written in a single
920 write() function, the timeout was being re-applied to each part-write.
921 This seems wrong - if the receiver was accepting one byte at a time it
922 would take for ever. The timeout is now adjusted when this happens. It
923 doesn't have to be particularly precise.
925 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
926 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
928 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
929 without a domain if the check to <postmaster@domain> fails.
931 SC/01 Eximstats: added -xls and the ability to specify output files
932 (patch written by Frank Heydlauf).
934 SC/02 Eximstats: use FileHandles for outputing results.
936 SC/03 Eximstats: allow any combination of xls, txt, and html output.
938 SC/04 Eximstats: fixed display of large numbers with -nvr option
940 SC/05 Eximstats: fixed merging of reports with empty tables.
942 SC/06 Eximstats: added the -include_original_destination flag
944 SC/07 Eximstats: removed tabs and trailing whitespace.
946 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
948 TK/06 MBOX spool code: Add real "From " MBOX separator line
949 so the .eml file is really in mbox format (even though
950 most programs do not really care). Patch from Alex Miller.
952 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
953 The latter is generated from $received_to and is only set if the
954 message has one envelope recipient. SA can use these headers,
955 obviously out-of-the-box. Patch from Alex Miller.
957 PH/08 The ${def test on a variable was returning false if the variable's
958 value was "0", contrary to what the specification has always said!
959 The result should be true unless the variable is empty.
961 PH/09 The syntax error of a character other than { following "${if
962 def:variable_name" (after optional whitespace) was not being diagnosed.
963 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
964 accidental colon was present, for example, could give incorrect results.
966 PH/10 Tidied the code in a number of places where the st_size field of a stat()
967 result is used (not including appendfile, where other changes are about
970 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
971 This involved changing a lot of size variables from int to off_t. It
972 should work with maildirs and everything.
974 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
975 spamd dying while we are connected to it.
977 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
980 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
981 function for BDB 4.3.
983 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
985 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
986 the sources for PCRE have been re-arranged and more files are now
989 PH/15 The code I had for printing potentially long long variables in PH/11
990 above was not the best (it lost precision). The length of off_t variables
991 is now inspected at build time, and an appropriate printing format (%ld
992 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
993 to be "long long int" or "long int". This is needed for the internal
994 formatting function string_vformat().
996 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
997 the configuration file to be ":syslog", then the script "guesses" where
998 the logs files are, rather than using the compiled in default. In our
999 case the guess is not the same as the compiled default, so the script
1000 suddenly stopped working when I started to use syslog. The patch checks
1001 to see if log_file_path is "". If so, it attempts to read it from exim
1002 with no configuration file to get the compiled in version, before it
1003 falls back to the previous guessing code."
1005 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1006 implementing BATV in an Exim configuration. See NewStuff for the gory
1009 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1010 Makefile that are specific to HP-UX.
1012 PH/18 If the "use_postmaster" option was set for a recipient callout together
1013 with the "random" option, the postmaster address was used as the MAIL
1014 FROM address for the random test, but not for the subsequent recipient
1015 test. It is now used for both.
1017 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1018 patch removes a few documentation additions to RFC 3028, because the
1019 latest draft now contains them. It adds the new en;ascii-case comparator
1020 and a new error check for 8bit text in MIME parts. Comparator and
1021 require names are now matched exactly. I enabled the subaddress
1022 extension, but it is not well tested yet (read: it works for me)."
1024 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1025 rework some of the code of TK/09 above to avoid the hardwired use of
1026 "%lld" and "long long". Replaced the call to snprintf() with a call to
1029 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1030 records point to non-existent hosts", "retry timeout exceeded", and
1031 "retry time not reached for any host after a long failure period".
1033 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1034 experimental DomainKeys support:
1036 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1037 (2) On an error such as an illegally used "control", the wrong name for
1038 the control was given.
1040 These problems did NOT occur unless DomainKeys support was compiled.
1042 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1044 PH/24 Added ${if match_ip condition.
1046 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1047 databases so that it will be absolutely obvious if a crash occurs in the
1048 DB library. This is a regular occurrence (often caused by mis-matched
1051 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1052 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1053 picked up on a user's system that detects such things. There doesn't seem
1054 to be a gcc warning option for this - only an attribute that has to be
1055 put on the function's prototype. It seems that in Fedora Core 4 they have
1056 set this on a number of new functions. No doubt there will be more in due
1059 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1060 specify a transport. However, if an address that was verified by such a
1061 router was the subject of a callout, Exim crashed because it tried to
1062 read the rcpt_include_affixes from the non-existent transport. Now it
1063 just assumes that the setting of that option is false. This bug was
1064 introduced by 4.51/PH/31.
1066 PH/28 Changed -d+all to exclude +memory, because that information is very
1067 rarely of interest, but it makes the output a lot bigger. People tend to
1068 do -d+all out of habit.
1070 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1071 code in os-type was giving problems when libc.so lives in lib64, like on
1074 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1075 aren't the modern standard, and it seems that some systems' include files
1076 don't always have them. Exim was already checking for some of the newer
1077 ones like T_AAAA, and defining it itself. I've added checks for all the
1078 record types that Exim uses.
1080 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1081 not automatically generating a new one, as it is supposed to. This
1082 prevented TLS from working. If the file did exist, but contained invalid
1083 data, a new version was generated, as expected. It was only the case of a
1084 non-existent file that was broken.
1086 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1087 with a change in libdomainkeys > 0.64.
1089 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1090 from DNS. If the selector record carries the flag, it now has
1091 precedence over the domain-wide flag.
1093 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1095 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1096 the use of a port name that isn't defined in /etc/services) occurred, the
1097 message was deferred as in a normal delivery, and thus remained on the
1098 spool, instead of being failed because of the mua_wrapper setting. This
1099 is now fixed, and I tidied up some of the mua_wrapper messages at the
1102 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1103 the messages in a hash of arrays rather than using individual hashes.
1104 This is a bit cleaner and results in dramatic memory savings, albeit
1105 at a slight CPU cost.
1107 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1108 as requested by Marc Sherman.
1110 SC/10 Eximstats: added histograms for user specified patterns as requested
1113 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1115 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1116 fopen() in the content-scanning modules that did not already have it.
1122 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1123 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1125 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1127 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1129 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1130 to test Sieve filters that use "vacation".
1132 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1133 that changes the way the GnuTLS parameters are stored in the cache file.
1134 The new format can be generated externally. For backward compatibility,
1135 if the data in the cache doesn't make sense, Exim assumes it has read an
1136 old-format file, and it generates new data and writes a new file. This
1137 means that you can't go back to an older release without removing the
1140 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1141 work if there are any delivery delays because "one_time" forces the
1142 parent to be marked "delivered", so its unseen clone is never tried
1143 again. For this reason, Exim now forbids the simultaneous setting of
1146 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1147 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1148 entry if you want to know the details. The fix, however, neglected to
1149 consider the case when local delivery batching is involved. The test for
1150 "previously delivered" was not happening when checking to see if an
1151 address could be batched with a previous (undelivered) one; under
1152 certain circumstances this could lead to multiple deliveries to the same
1155 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1156 in its include files, and this causes problems building Exim.
1158 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1159 header_syntax) but Exim was just ignoring anything given after a slash.
1160 In particular, this caused confusion with an attempt to use "verify =
1161 reverse_host_lookup/defer_ok". An error is now given when options are
1162 supplied for verify items that do not have them. (Maybe reverse_host_
1163 lookup should have a defer_ok option, but that's a different point.)
1165 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1166 defined by RFC 821) to 2048, because there were problems with some AUTH
1167 commands, and RFC 1869 says the size should be increased for extended
1168 SMTP commands that take arguments.
1170 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1173 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1174 "unknown" error; now it says that the functionality isn't in the binary.
1176 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1177 an address' error message when a string expansion fails (syntax or
1178 whatever). Otherwise the password may appear in the log. Following change
1179 PH/42 below, there is no longer a chance of it appearing in a bounce
1182 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1184 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1185 of its addresses was ever tried. (Bugzilla bug #2.)
1187 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1188 the result incorrectly in the debug output. (It correctly added a newline
1189 to what was transported.)
1191 TF/01 Added $received_time.
1193 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1194 commented out examples of how to interface to a virus scanner and to
1195 SpamAssassin. Also added commented examples of av_scanner and
1196 spamd_address settings.
1198 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1199 and controls are allowed in which ACLs. There were a couple of minor
1200 errors. Some of the entries in the conditions table (which is a table of
1201 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1202 negation of where the condition IS allowed.
1204 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1206 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1207 header file does not have a version number, so I've had to invent a new
1208 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1209 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1210 radiusclient), but it was contributed by a Radius user.
1212 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1213 files or directories, for OpenSSL.
1215 PH/19 When an Exim process that is running as root has to create an Exim log
1216 file, it does so in a subprocess that runs as exim:exim so as to get the
1217 ownership right at creation (otherwise, other Exim processes might see
1218 the file with the wrong ownership). There was no test for failure of this
1219 fork() call, which would lead to the process getting stuck as it waited
1220 for a non-existent subprocess. Forks do occasionally fail when resources
1221 run out. I reviewed all the other calls to fork(); they all seem to check
1224 PH/20 When checking for unexpected SMTP input at connect time (before writing
1225 the banner), Exim was not dealing correctly with a non-positive return
1226 from the read() function. If the client had disconnected by this time,
1227 the result was a log entry for a synchronization error with an empty
1228 string after "input=" when read() returned zero. If read() returned -1
1229 (an event I could not check), uninitialized data bytes were printed.
1230 There were reports of junk text (parts of files, etc) appearing after
1233 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1235 PH/22 Added support for macro redefinition, and (re)definition in between
1236 driver and ACL definitions.
1238 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1239 forgetting to use the resulting value; it was using the unexpanded value.
1241 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1242 hadn't been configured. The fix is from Juergen Kreileder, who
1243 understands it better than I do:
1245 "Here's what I see happening with three configured cyrus_sasl
1246 authenticators configured (plain, login, cram-md5):
1248 On startup auth_cyrus_sasl_init() gets called for each of these.
1249 This means three calls to sasl_listmech() without a specified mech_list.
1250 => SASL tests which mechs of all available mechs actually work
1251 => three warnings about OTP not working
1252 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1254 With the patch, sasl_listmech() also gets called three times. But now
1255 SASL's mech_list option is set to the server_mech specified in the the
1256 authenticator. Or in other words, the answer from sasl_listmech()
1257 gets limited to just the mech you're testing for (which is different
1259 => the return list contains just 'plain' or 'login', 'cram-md5' or
1260 nothing depending on the value of ob->server_mech.
1262 I've just tested the patch: Authentication still works fine,
1263 unavailable mechs specified in the exim configuration are still
1264 caught, and the auth.log warnings about OTP are gone."
1266 PH/25 When debugging is enabled, the contents of the command line are added
1267 to the debugging output, even when log_selector=+arguments is not
1270 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1271 answer is "GNU", and only if the return is "GNU/something" is the answer
1274 PH/27 $acl_verify_message is now set immediately after the failure of a
1275 verification in an ACL, and so is available in subsequent modifiers. In
1276 particular, the message can be preserved by coding like this:
1278 warn !verify = sender
1279 set acl_m0 = $acl_verify_message
1281 Previously, $acl_verify_message was set only while expanding "message"
1282 and "log_message" when a very denied access.
1284 PH/28 Modified OS/os.c-Linux with
1286 -#ifndef OS_LOAD_AVERAGE
1287 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1289 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1290 nomenclature these days.)
1292 PH/29 Installed patch from the Sieve maintainer that adds the options
1293 sieve_useraddress and sieve_subaddress to the redirect router.
1295 PH/30 In these circumstances:
1296 . Two addresses routed to the same list of hosts;
1297 . First host does not offer TLS;
1298 . First host accepts first address;
1299 . First host gives temporary error to second address;
1300 . Second host offers TLS and a TLS session is established;
1301 . Second host accepts second address.
1302 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1303 and peerdn, if requested) that were in fact used only for the second
1306 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1307 attention to any local part prefix or suffix that was matched by the
1308 router that accepted the address. It now behaves in the same way as it
1309 does for delivery: the affixes are removed from the local part unless
1310 rcpt_include_affixes is set on the transport.
1312 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1313 timeout during the DATA phase of an incoming message.
1315 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1316 applied a patch sanctioned by the Sieve maintainer.
1318 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1319 the uid or gid is negative. A case of a negative gid caused this to be
1320 noticed. The fix allows for either to be negative.
1322 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1323 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1326 PH/36 The change PH/12 above was broken. Fixed it.
1328 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1329 the grounds that routing the same address twice would always produce the
1330 same answer. This might have been true once, but it is certainly no
1331 longer true now. Routing a child address may depend on the previous
1332 routing that produced that child. Some complicated redirection strategies
1333 went wrong when messages had multiple recipients, and made Exim's
1334 behaviour dependent on the order in which the addresses were given.
1336 I have moved the duplicate checking until after the routing is complete.
1337 Exim scans the addresses that are assigned to local and remote
1338 transports, and removes any duplicates. This means that more work will be
1339 done, as duplicates will always all be routed, but duplicates are
1340 presumably rare, so I don't expect this is of any significance.
1342 For deliveries to pipes, files, and autoreplies, the duplicate checking
1343 still happens during the routing process, since they are not going to be
1346 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1347 It corrects a timeout issue with spamd. This is Ian's comment: "The
1348 background is that sometimes spamd either never reads data from a
1349 connection it has accepted, or it never writes response data. The exiscan
1350 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1351 blindly assumes that writes won't block so it may never time out."
1353 PH/39 Allow G after quota size as well as K and M.
1355 PH/40 The value set for $authenticated_id in an authenticator may not contain
1356 binary zeroes or newlines because the value is written to log lines and
1357 to spool files. There was no check on this. Now the value is run through
1358 the string_printing() function so that such characters are converted to
1359 printable escape sequences.
1361 PH/41 $message_linecount is a new variable that contains the total number of
1362 lines in the message. Compare $body_linecount, which is the count for the
1365 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1366 bounce and delay warning messages, except in certain special cases, which
1369 (a) An SMTP error message from a remote host;
1370 (b) A message specified in a :fail: redirection;
1371 (c) A message specified in a "fail" command in a system filter;
1372 (d) A message specified in a FAIL return from the queryprogram router;
1373 (e) A message specified by the cannot_route_message router option.
1375 In these cases only, Exim does include the error details in bounce and
1376 warning messages. There are also a few cases where bland messages such
1377 as "unrouteable address" or "local delivery error" are given.
1379 PH/43 $value is now also set for the "else" part of a ${run expansion.
1381 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1382 being worked on, but at least Exim now implements the latest version to
1385 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1386 process to complete was treated as a delivery failure, a timeout while
1387 writing the message to the pipe was logged, but erroneously treated as a
1388 successful delivery. Such timeouts include transport filter timeouts. For
1389 consistency with the overall process timeout, these timeouts are now
1390 treated as errors, giving rise to delivery failures by default. However,
1391 there is now a new Boolean option for the pipe transport called
1392 timeout_defer, which, if set TRUE, converts the failures into defers for
1393 both kinds of timeout. A transport filter timeout is now identified in
1396 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1397 systems where "make" and "gmake" are different, calling "gmake" at top
1398 level broke things. I've arranged for the value of $(MAKE) to be passed
1399 from the Makefile to this script so that it can call the same version of
1403 A note about Exim versions 4.44 and 4.50
1404 ----------------------------------------
1406 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1407 changes of various kinds. As a consequence, a big documentation update was
1408 needed. This delayed the release for rather longer than seemed good, especially
1409 in the light of a couple of (minor) security issues. Therefore, the changes
1410 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1411 release. So 4.44 and 4.50 are in effect two different branches that both start
1414 I have left the 4.50 change log unchanged; it contains all the changes since
1415 4.43. The change log for 4.44 is below; many of its items are identical to
1416 those for 4.50. This seems to be the most sensible way to preserve the
1417 historical information.
1423 1. Minor wording change to the doc/README.SIEVE file.
1425 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1426 computation of the current number of files was incorrect.
1428 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1429 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1432 4. Give more explanation in the error message when the command for a transport
1433 filter fails to execute.
1435 5. There are several places where Exim runs a non-Exim command in a
1436 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1437 was being done only for the command run by the queryprogram router. It is
1438 now done for all such subprocesses. The other cases are: ${run, transport
1439 filters, and the commands run by the lmtp and pipe transports.
1441 6. Added CONFIGURE_GROUP build-time option.
1443 7. Some older OS have a limit of 256 on the maximum number of file
1444 descriptors. Exim was using setrlimit() to set 1000 as a large value
1445 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1446 systems. I've change it so that if it can't get 1000, it tries for 256.
1448 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1449 was an oversight, and furthermore, ever since the addition of extra
1450 controls (e.g. 4.43/32), the checks on when to allow different forms of
1451 "control" were broken. There should now be diagnostics for all cases when a
1452 control that does not make sense is encountered.
1454 9. Added the /retain_sender option to "control=submission".
1456 10. $recipients is now available in the predata ACL (oversight).
1458 11. Tidy the search cache before the fork to do a delivery from a message
1459 received from the command line. Otherwise the child will trigger a lookup
1460 failure and thereby defer the delivery if it tries to use (for example) a
1461 cached ldap connection that the parent has called unbind on.
1463 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1464 of $address_data from the recipient verification was clobbered by the
1465 sender verification.
1467 13. The value of address_data from a sender verification is now available in
1468 $sender_address_data in subsequent conditions in the ACL statement.
1470 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1472 15. Added a new option "connect=<time>" to callout options, to set a different
1475 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1476 was its contents. (It was OK if the option was not defined at all.)
1478 17. A "Completed" log line is now written for messages that are removed from
1479 the spool by the -Mrm option.
1481 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1482 information about exactly what failed.
1484 19. Added -dd to debug only the daemon process.
1486 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1487 handles timeouts, both on the server side and network timeouts. Renamed the
1488 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1490 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1491 It is now set to "smtps".
1493 22. $host_address is now set to the target address during the checking of
1494 ignore_target_hosts.
1496 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1497 being passed; this would have caused $sender_host_name to have been used if
1498 matching the list had actually called for a host name (not very likely,
1499 since this list is usually IP addresses). A host name is now passed as
1502 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1503 code that specifies a non-restarting handler (typically sigaction() in
1504 modern systems) in an attempt to fix a rare and obscure crash bug.
1506 25. Narrowed the window for a race in the daemon that could cause it to ignore
1507 SIGCHLD signals. This is not a major problem, because they are used only to
1508 wake it up if nothing else does.
1510 26. A malformed maildirsize file could cause Exim to calculate negative values
1511 for the mailbox size or file count. Odd effects could occur as a result.
1512 The maildirsize information is now recalculated if the size or filecount
1515 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1516 support for a long time. Removed HAVE_SYS_VFS_H.
1518 28. Installed the latest version of exipick from John Jetmore.
1520 29. In an address list, if the pattern was not a regular expression, an empty
1521 subject address (from a bounce message) matched only if the pattern was an
1522 empty string. Non-empty patterns were not even tested. This was the wrong
1523 because it is perfectly reasonable to use an empty address as part of a
1524 database query. An empty address is now tested by patterns that are
1525 lookups. However, all the other forms of pattern expect the subject to
1526 contain a local part and a domain, and therefore, for them, an empty
1527 address still always fails if the pattern is not itself empty.
1529 30. Exim went into a mad DNS loop when attempting to do a callout where the
1530 host was specified on an smtp transport, and looking it up yielded more
1531 than one IP address.
1533 31. Re-factored the code for checking spool and log partition space into a
1534 function that finds that data and another that does the check. The former
1535 is then used to implement four new variables: $spool_space, $log_space,
1536 $spool_inodes, and $log_inodes.
1538 32. The RFC2047 encoding function was originally intended for short strings
1539 such as real names; it was not keeping to the 75-character limit for
1540 encoded words that the RFC imposes. It now respects the limit, and
1541 generates multiple encoded words if necessary. To be on the safe side, I
1542 have increased the buffer size for the ${rfc2047: expansion operator from
1545 33. It is now permitted to omit both strings after an "if" condition; if the
1546 condition is true, the result is "true". As before, when the second string
1547 is omitted, a false condition yields an empty string. This makes it less
1548 cumbersome to write custom ACL and router conditions.
1550 34. Failure to deliver a bounce message always caused it to be frozen, even if
1551 there was an errors_to setting on the router. The errors_to setting is now
1554 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1555 canonical form (fully expanded) before being placed in
1556 $sender_host_address.
1558 36. The table in the code that translates DNS record types into text (T_A to
1559 "A" for instance) was missing entries for NS and CNAME. It is just possible
1560 that this could have caused confusion if both these types were looked up
1561 for the same domain, because the text type is used as part of Exim's
1562 per-process caching. But the chance of anyone hitting this buglet seems
1565 37. The dnsdb lookup has been extended in a number of ways.
1567 (1) There is a new type, "zns", which walks up the domain tree until it
1568 finds some nameserver records. It should be used with care.
1570 (2) There is a new type, "mxh", which is like "mx" except that it returns
1571 just the host names, not the priorities.
1573 (3) It is now possible to give a list of domains (or IP addresses) to be
1574 looked up. The behaviour when one of the lookups defers can be
1575 controlled by a keyword.
1577 (4) It is now possible to specify the separator character for use when
1578 multiple records are returned.
1580 38. The dnslists ACL condition has been extended: it is now possible to supply
1581 a list of IP addresses and/or domains to be looked up in a particular DNS
1584 39. Added log_selector=+queue_time_overall.
1586 40. When running the queue in the test harness, wait just a tad after forking a
1587 delivery process, to get repeatability of debugging output.
1589 41. Include certificate and key file names in error message when GnuTLS fails
1590 to set them up, because the GnuTLS error message doesn't include the name
1591 of the failing file when there is a problem reading it.
1593 42. Allow both -bf and -bF in the same test run.
1595 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1597 44. The "Exiscan patch" is now merged into the mainline Exim source.
1599 45. Sometimes the final signoff response after QUIT could fail to get
1600 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1601 < 0 before doing a fflush(). This bug looks as though it goes back to the
1602 introduction of TLS in release 3.20, but "sometimes" must have been rare
1603 because the tests only now provoked it.
1605 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1606 (this can affect the format of dates).
1608 47. exim_tidydb, when checking for the continued existence of a message for
1609 which it has found a message-specific retry record, was not finding
1610 messages that were in split spool directories. Consequently, it was
1611 deleting retry records that should have stayed in existence.
1613 48. Steve fixed some bugs in eximstats.
1615 49. The SPA authentication driver was not abandoning authentication and moving
1616 on to the next authenticator when an expansion was forced to fail,
1617 contradicting the general specification for all authenticators. Instead it
1618 was generating a temporary error. It now behaves as specified.
1620 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1621 (the order specifies the preference for clients). The order is now AES256,
1622 AES128, 3DES, ARCFOUR128.
1624 51. Small patch to Sieve code - explicitly set From: when generating an
1627 52. Exim crashed if a remote delivery caused a very long error message to be
1628 recorded - for instance if somebody sent an entire SpamAssassin report back
1629 as a large number of 550 error lines. This bug was coincidentally fixed by
1630 increasing the size of one of Exim's internal buffers (big_buffer) that
1631 happened as part of the Exiscan merge. However, to be on the safe side, I
1632 have made the code more robust (and fixed the comments that describe what
1635 53. Now that there can be additional text after "Completed" in log lines (if
1636 the queue_time_overall log selector is set), a one-byte patch to exigrep
1637 was needed to allow it to recognize "Completed" as not the last thing in
1640 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1641 patch that reportedly fixes this has been added. I am not expert enough to
1642 create a test for it. This is what the patch creator wrote:
1644 "I found a little strange behaviour of ldap code when working with
1645 Windows 2003 AD Domain, where users was placed in more than one
1646 Organization Units. When I tried to give exim partial DN, the exit code
1647 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1648 But simultaneously result of request was absolutely normal ldap result,
1649 so I produce this patch..."
1651 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1652 REFERENCE, so I have modified the code to exclude the patch when that macro
1655 55. Some experimental protocols are using DNS PTR records for new purposes. The
1656 keys for these records are domain names, not reversed IP addresses. The
1657 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1658 leaves it alone. Component reversal etc. now happens only for IP addresses.
1661 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1663 57. Double the size of the debug message buffer (to 2048) so that more of very
1664 long debug lines gets shown.
1666 58. The exicyclog utility now does better if the number of log files to keep
1667 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1669 59. Two changes related to the smtp_active_hostname option:
1671 (1) $smtp_active_hostname is now available as a variable.
1672 (2) The default for smtp_banner uses $smtp_active_hostname instead
1673 of $primary_hostname.
1675 60. The host_aton() function is supposed to be passed a string that is known
1676 to be a valid IP address. However, in the case of IPv6 addresses, it was
1677 not checking this. This is a hostage to fortune. Exim now panics and dies
1678 if the condition is not met. A case was found where this could be provoked
1679 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1680 components; fortuitously, this particular loophole had already been fixed
1681 by change 4.50/55 above.
1683 If there are any other similar loopholes, the new check in host_aton()
1684 itself should stop them being exploited. The report I received stated that
1685 data on the command line could provoke the exploit when Exim was running as
1686 exim, but did not say which command line option was involved. All I could
1687 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1688 running as the user.
1691 61. There was a buffer overflow vulnerability in the SPA authentication code
1692 (which came originally from the Samba project). I have added a test to the
1693 spa_base64_to_bits() function which I hope fixes it.
1696 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1697 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1699 63. The daemon start-up calls getloadavg() while still root for those OS that
1700 need the first call to be done as root, but it missed one case: when
1701 deliver_queue_load_max is set with deliver_drop_privilege. This is
1702 necessary for the benefit of the queue runner, because there is no re-exec
1703 when deliver_drop_privilege is set.
1705 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1706 This has been fixed.
1708 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1709 was in use, was not putting the data itself into the right store pool;
1710 consequently, it could be overwritten for a subsequent message in the same
1711 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1714 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1716 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1717 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1718 the function were treating the return as a boolean value, which happened to
1719 work because 0=false and not-0=true, but is not correct code.
1721 68. The host_aton() function was not handling scoped IPv6 addresses (those
1722 with, for example, "%eth0" on the end) correctly.
1724 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1725 negated items (that is, ~something) in unsigned ints. Some compilers
1726 apparently mutter when there is no cast.
1728 70. If an address verification called from an ACL failed, and did not produce a
1729 user-specific message (i.e. there was only a "system" message), nothing was
1730 put in $acl_verify_message. In this situation, it now puts the system
1733 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1734 session; change 4.31/43 added the unwanted input to the log line - except
1735 that it did not do this in the start of session case. It now does.
1737 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1738 This is wrong and can cause the other end to generate a synchronization
1739 error if it is another Exim or anything else that does the synchronization
1740 check. A QUIT command is no longer sent after a timeout.
1742 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1743 during host lookups.
1745 74. The defer_ok option of callout verification was not working if it was used
1746 when verifying addresses in header lines, that is, for this case:
1748 verify = header_sender/callout=defer_ok
1750 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1751 those file descriptors could be used for SMTP connections. If anything
1752 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1753 could be sent to the SMTP client, causing chaos. The daemon now opens
1754 stdin, stdout, and stderr to /dev/null when it puts itself into the
1757 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1758 log by default. The user can override this with suitable Perl magic.
1760 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1761 the log message when discard triggers, was not working for the DATA ACL or
1762 for the non-SMTP ACL.
1764 78. Error message wording change in sieve.c.
1766 79. If smtp_accept_max_per_host was set, the number of connections could be
1767 restricted to fewer than expected, because the daemon was trying to set up
1768 a new connection before checking whether the processes handling previous
1769 connections had finished. The check for completed processes is now done
1770 earlier. On busy systems, this bug wouldn't be noticed because something
1771 else would have woken the daemon, and it would have reaped the completed
1774 80. If a message was submitted locally by a user whose login name contained one
1775 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1776 It caused a spool format error. I have fixed the spool reading code. A
1777 related problem was that the "from" clause in the Received: line became
1778 illegal because of the space(s). It is now covered by ${quote_local_part.
1780 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1783 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1785 83. Patch from Sieve maintainer to fix unterminated string problem in
1786 "vacation" handling.
1788 84. Some minor changes to the Linux configuration files to help with other
1789 OS variants using glibc.
1791 85. One more patch for Sieve to update vacation handling to latest spec.
1794 ----------------------------------------------------
1795 See the note above about the 4.44 and 4.50 releases.
1796 ----------------------------------------------------
1802 1. Change 4.43/35 introduced a bug that caused file counts to be
1803 incorrectly computed when quota_filecount was set in an appendfile
1806 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1807 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1810 3. Give more explanation in the error message when the command for a transport
1811 filter fails to execute.
1813 4. There are several places where Exim runs a non-Exim command in a
1814 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1815 was being done only for the command run by the queryprogram router. It is
1816 now done for all such subprocesses. The other cases are: ${run, transport
1817 filters, and the commands run by the lmtp and pipe transports.
1819 5. Some older OS have a limit of 256 on the maximum number of file
1820 descriptors. Exim was using setrlimit() to set 1000 as a large value
1821 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1822 systems. I've change it so that if it can't get 1000, it tries for 256.
1824 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1825 was an oversight, and furthermore, ever since the addition of extra
1826 controls (e.g. 4.43/32), the checks on when to allow different forms of
1827 "control" were broken. There should now be diagnostics for all cases when a
1828 control that does not make sense is encountered.
1830 7. $recipients is now available in the predata ACL (oversight).
1832 8. Tidy the search cache before the fork to do a delivery from a message
1833 received from the command line. Otherwise the child will trigger a lookup
1834 failure and thereby defer the delivery if it tries to use (for example) a
1835 cached ldap connection that the parent has called unbind on.
1837 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1838 of $address_data from the recipient verification was clobbered by the
1839 sender verification.
1841 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1842 was its contents. (It was OK if the option was not defined at all.)
1844 11. A "Completed" log line is now written for messages that are removed from
1845 the spool by the -Mrm option.
1847 12. $host_address is now set to the target address during the checking of
1848 ignore_target_hosts.
1850 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1851 being passed; this would have caused $sender_host_name to have been used if
1852 matching the list had actually called for a host name (not very likely,
1853 since this list is usually IP addresses). A host name is now passed as
1856 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1857 code that specifies a non-restarting handler (typically sigaction() in
1858 modern systems) in an attempt to fix a rare and obscure crash bug.
1860 15. Narrowed the window for a race in the daemon that could cause it to ignore
1861 SIGCHLD signals. This is not a major problem, because they are used only to
1862 wake it up if nothing else does.
1864 16. A malformed maildirsize file could cause Exim to calculate negative values
1865 for the mailbox size or file count. Odd effects could occur as a result.
1866 The maildirsize information is now recalculated if the size or filecount
1869 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1870 support for a long time. Removed HAVE_SYS_VFS_H.
1872 18. Updated exipick to current release from John Jetmore.
1874 19. Allow an empty sender to be matched against a lookup in an address list.
1875 Previously the only cases considered were a regular expression, or an
1878 20. Exim went into a mad DNS lookup loop when doing a callout where the
1879 host was specified on the transport, if the DNS lookup yielded more than
1882 21. The RFC2047 encoding function was originally intended for short strings
1883 such as real names; it was not keeping to the 75-character limit for
1884 encoded words that the RFC imposes. It now respects the limit, and
1885 generates multiple encoded words if necessary. To be on the safe side, I
1886 have increased the buffer size for the ${rfc2047: expansion operator from
1889 22. Failure to deliver a bounce message always caused it to be frozen, even if
1890 there was an errors_to setting on the router. The errors_to setting is now
1893 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1894 canonical form (fully expanded) before being placed in
1895 $sender_host_address.
1897 24. Updated eximstats to version 1.33
1899 25. Include certificate and key file names in error message when GnuTLS fails
1900 to set them up, because the GnuTLS error message doesn't include the name
1901 of the failing file when there is a problem reading it.
1903 26. Expand error message when OpenSSL has problems setting up cert/key files.
1906 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1907 (this can affect the format of dates).
1909 28. exim_tidydb, when checking for the continued existence of a message for
1910 which it has found a message-specific retry record, was not finding
1911 messages that were in split spool directories. Consequently, it was
1912 deleting retry records that should have stayed in existence.
1914 29. eximstats updated to version 1.35
1915 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1916 1.35 - bugfix such that pie charts by volume are generated correctly
1918 30. The SPA authentication driver was not abandoning authentication and moving
1919 on to the next authenticator when an expansion was forced to fail,
1920 contradicting the general specification for all authenticators. Instead it
1921 was generating a temporary error. It now behaves as specified.
1923 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1924 (the order specifies the preference for clients). The order is now AES256,
1925 AES128, 3DES, ARCFOUR128.
1927 31. Small patch to Sieve code - explicitly set From: when generating an
1930 32. Exim crashed if a remote delivery caused a very long error message to be
1931 recorded - for instance if somebody sent an entire SpamAssassin report back
1932 as a large number of 550 error lines. This bug was coincidentally fixed by
1933 increasing the size of one of Exim's internal buffers (big_buffer) that
1934 happened as part of the Exiscan merge. However, to be on the safe side, I
1935 have made the code more robust (and fixed the comments that describe what
1938 33. Some experimental protocols are using DNS PTR records for new purposes. The
1939 keys for these records are domain names, not reversed IP addresses. The
1940 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1941 leaves it alone. Component reversal etc. now happens only for IP addresses.
1944 34. The host_aton() function is supposed to be passed a string that is known
1945 to be a valid IP address. However, in the case of IPv6 addresses, it was
1946 not checking this. This is a hostage to fortune. Exim now panics and dies
1947 if the condition is not met. A case was found where this could be provoked
1948 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1949 components; fortuitously, this particular loophole had already been fixed
1950 by change 4.50/55 or 4.44/33 above.
1952 If there are any other similar loopholes, the new check in host_aton()
1953 itself should stop them being exploited. The report I received stated that
1954 data on the command line could provoke the exploit when Exim was running as
1955 exim, but did not say which command line option was involved. All I could
1956 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1957 running as the user.
1960 35. There was a buffer overflow vulnerability in the SPA authentication code
1961 (which came originally from the Samba project). I have added a test to the
1962 spa_base64_to_bits() function which I hope fixes it.
1965 36. The daemon start-up calls getloadavg() while still root for those OS that
1966 need the first call to be done as root, but it missed one case: when
1967 deliver_queue_load_max is set with deliver_drop_privilege. This is
1968 necessary for the benefit of the queue runner, because there is no re-exec
1969 when deliver_drop_privilege is set.
1971 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1972 was in use, was not putting the data itself into the right store pool;
1973 consequently, it could be overwritten for a subsequent message in the same
1974 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1977 38. Sometimes the final signoff response after QUIT could fail to get
1978 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1979 < 0 before doing a fflush(). This bug looks as though it goes back to the
1980 introduction of TLS in release 3.20, but "sometimes" must have been rare
1981 because the tests only now provoked it.
1987 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1988 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1989 Now it returns an integer. A number of calls were still expecting a T/F
1990 return. Fortuitously, in all cases, the tests worked in OK situations,
1991 which is the norm. However, things would have gone wrong on any write
1992 failures on the smtp file descriptor. This function is used when sending
1993 messages over SMTP and also when doing verify callouts.
1995 2. When Exim is called to do synchronous delivery of a locally submitted
1996 message (the -odf or -odi options), it no longer closes stderr before doing
1999 3. Implemented the mua_wrapper option.
2001 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2003 5. Implemented the functions header_remove(), header_testname(),
2004 header_add_at_position(), and receive_remove_recipient(), and exported them
2007 6. If an ACL "warn" statement specified the addition of headers, Exim already
2008 inserted X-ACL-Warn: at the start if there was no header name. However, it
2009 was not making this test for the second and subsequent header lines if
2010 there were newlines in the string. This meant that an invalid header could
2011 be inserted if Exim was badly configured.
2013 7. Allow an ACL "warn" statement to add header lines at the start or after all
2014 the Received: headers, as well as at the end.
2016 8. Added the rcpt_4xx retry error code.
2018 9. Added postmaster_mailfrom=xxx to callout verification option.
2020 10. Added mailfrom=xxxx to the callout verification option, for verify=
2023 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2024 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2026 12. Inserted some casts to stop certain compilers warning when using pointer
2027 differences as field lengths or precisions in printf-type calls (mostly
2028 affecting debugging statements).
2030 13. Added optional readline() support for -be (dynamically loaded).
2032 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2033 same clock tick as a message's arrival, so that its received time was the
2034 same as the "first fail" time on the retry record, and that message
2035 remained on the queue past the ultimate address timeout, every queue runner
2036 would try a delivery (because it was past the ultimate address timeout) but
2037 after another failure, the ultimate address timeout, which should have then
2038 bounced the address, did not kick in. This was a "< instead of <=" error;
2039 in most cases the first failure would have been in the next clock tick
2040 after the received time, and all would be well.
2042 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2043 being recognized when the domain list was tested by the match_domain
2044 condition in an expansion string.
2046 16. Added the ${str2b64: operator.
2048 17. Exim was always calling setrlimit() to set a large limit for the number of
2049 processes, without checking whether the existing limit was already
2050 adequate. (It did check for the limit on file descriptors.) Furthermore,
2051 errors from getrlimit() and setrlimit() were being ignored. Now they are
2052 logged to the main and panic logs, but Exim does carry on, to try to do its
2053 job under whatever limits there are.
2055 18. Imported PCRE 5.0.
2057 19. Trivial typo in log message " temporarily refused connection" (the leading
2060 20. If the log selector return_path_on_delivery was set and an address was
2061 redirected to /dev/null, the delivery process crashed because it assumed
2062 that a return path would always be set for a "successful" delivery. In this
2063 case, the whole delivery is bypassed as an optimization, and therefore no
2066 21. Internal re-arrangement: the function for sending a challenge and reading
2067 a response while authentication was assuming a zero-terminated challenge
2068 string. It's now changed to take a pointer and a length, to allow for
2069 binary data in such strings.
2071 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2073 23. Exim was not respecting finduser_retries when seeking the login of the
2074 uid under which it was called; it was always trying 10 times. (The default
2075 setting of finduser_retries is zero.) Also, it was sleeping after the final
2076 failure, which is pointless.
2078 24. Implemented tls_on_connect_ports.
2080 25. Implemented acl_smtp_predata.
2082 26. If the domain in control=submission is set empty, Exim assumes that the
2083 authenticated id is a complete email address when it generates From: or
2084 Sender: header lines.
2086 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2087 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2088 chown and chgrp in /bin and hostname in /usr/bin.
2090 28. Exim was keeping the "process log" file open after each use, just as it
2091 does for the main log. This opens the possibility of it remaining open for
2092 long periods when the USR1 signal hits a daemon. Occasional processlog
2093 errors were reported, that could have been caused by this. Anyway, it seems
2094 much more sensible not to leave this file open at all, so that is what now
2097 29. The long-running daemon process does not normally write to the log once it
2098 has entered its main loop, and it closes the log before doing so. This is
2099 so that log files can straightforwardly be renamed and moved. However,
2100 there are a couple of unusual error situations where the daemon does write
2101 log entries, and I had neglected to close the log afterwards.
2103 30. The text of an SMTP error response that was received during a remote
2104 delivery was being truncated at 512 bytes. This is too short for some of
2105 the long messages that one sometimes sees. I've increased the limit to
2108 31. It is now possible to make retry rules that apply only when a message has a
2109 specific sender, in particular, an empty sender.
2111 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2112 it possible to be selective about when SMTP synchronization is enforced.
2114 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2116 32. Implemented hosts_connection_nolog.
2118 33. Added an ACL for QUIT.
2120 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2123 35. Added mailbox_size and mailbox_filecount to appendfile.
2125 36. Added control = no_multiline_responses to ACLs.
2127 37. There was a bug in the logic of the code that waits for the clock to tick
2128 in the case where the clock went backwards by a substantial amount such
2129 that the microsecond fraction of "now" was more than the microsecond
2130 fraction of "then" (but the whole seconds number was less).
2132 38. Added support for the libradius Radius client library this is found on
2133 FreeBSD (previously only the radiusclient library was supported).
2139 1. When certain lookups returned multiple values in the form name=value, the
2140 quoting of the values was not always being done properly. Specifically:
2141 (a) If the value started with a double quote, but contained no whitespace,
2143 (b) If the value contained whitespace other than a space character (i.e.
2144 tabs or newlines or carriage returns) it was not quoted.
2145 This fix has been applied to the mysql and pgsql lookups by writing a
2146 separate quoting function and calling it from the lookup code. The fix
2147 should probably also be applied to nisplus, ibase and oracle lookups, but
2148 since I cannot test any of those, I have not disturbed their existing code.
2150 2. A hit in the callout cache for a specific address caused a log line with no
2151 reason for rejecting RCPT. Now it says "Previous (cached) callout
2152 verification failure".
2154 3. There was an off-by-one bug in the queryprogram router. An over-long
2155 return line was truncated at 256 instead of 255 characters, thereby
2156 overflowing its buffer with the terminating zero. As well as fixing this, I
2157 have increased the buffer size to 1024 (and made a note to document this).
2159 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2160 when Exim is waiting for an SMTP response from a remote server, Exim
2161 restarts its select() call on the socket, thereby resetting its timeout.
2162 This is not a problem when such interrupts are rare. Somebody set up a cron
2163 job to run exiwhat every 2 minutes, which is less than the normal select()
2164 timeout (5 or 10 minutes). This meant that the select() timeout never
2165 kicked in because it was always reset. I have fixed this by comparing the
2166 time when an interrupt arrives with the time at the start of the first call
2167 to select(). If more time than the timeout has elapsed, the interrupt is
2168 treated as a timeout.
2170 5. Some internal re-factoring in preparation for the addition of Sieve
2171 extensions (by MH). In particular, the "personal" test is moved to a
2172 separate function, and given an option for scanning Cc: and Bcc: (which is
2173 not set for Exim filters).
2175 6. When Exim created an email address using the login of the caller as the
2176 local part (e.g. when creating a From: or Sender: header line), it was not
2177 quoting the local part when it contained special characters such as @.
2179 7. Installed new OpenBSD configuration files.
2181 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2182 try to make them clearer.
2184 9. Callout options, other than the timeout value, were being ignored when
2185 verifying sender addresses in header lines. For example, when using
2187 verify = header_sender/callout=no_cache
2189 the cache was (incorrectly) being used.
2191 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2192 only the Cygwin environment.
2194 11. When return_path_on_delivery was set as a log selector, if different remote
2195 addresses in the same message used different return paths and parallel
2196 remote delivery occurred, the wrong values would sometimes be logged.
2197 (Whenever a remote delivery process finished, the return path value from
2198 the most recently started remote delivery process was logged.)
2200 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2201 lines when AUTH and/or TLS are in use. This is the "received protocol"
2202 field. Exim used to use "asmtp" for authenticated SMTP, without any
2203 indication (in the protocol name) for TLS use. Now it follows the RFC and
2204 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2205 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2206 names appear in log lines as well as in Received: header lines.
2208 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2209 extensions, and comparison tests, and to fix some bugs.
2211 14. Changes to the "personal" filter test:
2213 (1) The test was buggy in that it was just doing the equivalent of
2214 "contains" tests on header lines. For example, if a user's address was
2215 anne@some.where, the "personal" test would incorrectly be true for
2217 To: susanne@some.where
2219 This test is now done by extracting each address from the header in turn,
2220 and checking the entire address. Other tests that are part of "personal"
2221 are now done using regular expressions (for example, to check local parts
2222 of addresses in From: header lines).
2224 (2) The list of non-personal local parts in From: addresses has been
2225 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2226 taken from the Sieve specification recommendations.
2228 (3) If the message contains any header line starting with "List-" it is
2229 treated as non-personal.
2231 (4) The test for "circular" in the Subject: header line has been removed
2232 because it now seems ill-conceived.
2234 15. Minor typos in src/EDITME comments corrected.
2236 16. Installed latest exipick from John Jetmore.
2238 17. If headers_add on a router specified a text string that was too long for
2239 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2240 of string_sprintf() is now avoided.
2242 18. $message_body_size was not set (it was always zero) when running the DATA
2243 ACL and the local_scan() function.
2245 19. For the "mail" command in an Exim filter, no default was being set for
2246 the once_repeat time, causing a random time value to be used if "once" was
2247 specified. (If the value happened to be <= 0, no repeat happened.) The
2248 default is now 0s, meaning "never repeat". The "vacation" command was OK
2249 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2250 (I found it when inspecting the code).
2252 20. There is now an overall timeout for performing a callout verification. It
2253 defaults to 4 times the callout timeout, which applies to individual SMTP
2254 commands during the callout. The overall timeout applies when there is more
2255 than one host that can be tried. The timeout is checked before trying the
2256 next host. This prevents very long delays if there are a large number of
2257 hosts and all are timing out (e.g. when the network connections are timing
2258 out). The value of the overall timeout can be changed by specifying an
2259 additional sub-option for "callout", called "maxwait". For example:
2261 verify = sender/callout=5s,maxwait=20s
2263 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2264 to the end before writing, but this should make it even safer).
2266 22. Exim was forgetting that it had advertised PIPELINING for the second and
2267 subsequent messages on an SMTP connection. It was also not resetting its
2268 memory on STARTTLS and an internal HELO.
2270 23. When Exim logs an SMTP synchronization error within a session, it now
2271 records whether PIPELINING has been advertised or not.
2273 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2274 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2275 rather than long int.
2277 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2279 26. Added the never_mail option to autoreply.
2285 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2286 crash if the getsockname() call failed; this can happen if a connection is
2287 closed very soon after it is established. The problem was simply in the
2288 order in which certain operations were done, causing Exim to try to write
2289 to the SMTP stream before it had set up the file descriptor. The bug has
2290 been fixed by making things happen in the correct order.
2296 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2297 before the connection was closed, thus losing the rejection response.
2299 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2300 some early Solaris releases, but causes trouble in current releases where
2301 socklen_t is defined.
2303 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2306 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2309 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2310 that releasing the top of it at the end releases what was used for sub-
2311 expansions (unless the block got too big). However, discard this block if
2312 the first thing is a variable or header, so that we can use its block when
2313 it is dynamic (useful for very large $message_headers, for example).
2315 6. Lookups now cache *every* query, not just the most recent. A new, separate
2316 store pool is used for this. It can be recovered when all lookup caches are
2317 flushed. Lookups now release memory at the end of their result strings.
2318 This has involved some general refactoring of the lookup sources.
2320 7. Some code has been added to the store_xxx() functions to reduce the amount
2321 of flapping under certain conditions.
2323 8. log_incoming_interface used to affect only the <= reception log lines. Now
2324 it causes the local interface and port to be added to several more SMTP log
2325 lines, for example "SMTP connection from", and rejection lines.
2327 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2329 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2331 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2332 could be overwritten at the end of the current message (or the start of a
2333 new message if it was set in a HELO ACL). The value is now preserved for
2334 the duration of the SMTP connection.
2336 12. If a transport had a headers_rewrite setting, and a matching header line
2337 contained an unqualified address, that address was qualified, even if it
2338 did not match any rewriting rules. The underlying bug was that the values
2339 of the flags that permit the existence of unqualified sender and recipient
2340 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2341 non-local messages, and by -bnq for local messages) were not being
2342 preserved with the message after it was received.
2344 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2345 "next input=" as part of the text comprising the host identity instead of
2346 the correct text. The code was using the same buffer for two different
2347 strings. However, depending on which order the printing function evaluated
2348 its arguments, the bug did not always show up. Under Linux, for example, my
2349 test suite worked just fine.
2351 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2352 doesn't work with some older versions of Perl. It has been changed to "my",
2353 which in any case is probably the better facility to use.
2355 15. A really picky compiler found some instances of statements for creating
2356 error messages that either had too many or two few arguments for the format
2359 16. The size of the buffer for calls to the DNS resolver has been increased
2360 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2361 for addresses that have a lot of PTR records. This alleviates a problem; it
2362 does not fully solve it.
2364 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2365 buffer now truncates the list and logs the incident, which is the same
2366 action as happens when Exim is looking up a host name and its aliases.
2367 Previously in this situation something unpredictable would happen;
2368 sometimes it was "internal error: store_reset failed".
2370 18. If a server dropped the connection unexpectedly when an Exim client was
2371 using GnuTLS and trying to read a response, the client delivery process
2372 crashed while trying to generate an error log message.
2374 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2375 string, for example:
2377 warn message = H1: something\nH2: something
2379 the text was added as a single header line from Exim's point of view
2380 though it ended up OK in the delivered message. However, searching for the
2381 second and subsequent header lines using $h_h2: did not work. This has been
2382 fixed. Similarly, if a system filter added multiple headers in this way,
2383 the routers could not see them.
2385 20. Expanded the error message when iplsearch is called with an invalid key to
2386 suggest using net-iplsearch in a host list.
2388 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2389 ACLs are no longer actually imposed (and a message to that effect is
2392 22. If a "gecos" field in a passwd entry contained escaped characters, in
2393 particular, if it contained a \" sequence, Exim got it wrong when building
2394 a From: or a Sender: header from that name. A second bug also caused
2395 incorrect handling when an unquoted " was present following a character
2396 that needed quoting.
2398 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2399 was not being matched caselessly.
2401 24. Arranged for all hyphens in the exim.8 source to be escaped with
2404 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2405 properly. Recipient callout cache records were still being keyed to include
2406 the sender, even when use_sender was set false. This led to far more
2407 callouts that were necessary. The sender is no longer included in the key
2408 when use_sender is false.
2410 26. Added "control = submission" modifier to ACLs.
2412 27. Added the ${base62d: operator to decode base 62 numbers.
2414 28. dnsdb lookups can now access SRV records.
2416 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2417 the configuration file.
2419 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2420 (-v) mode. This makes the output for a verbose queue run more intelligible.
2422 31. Added a use_postmaster feature to recipient callouts.
2424 32. Added the $body_zerocount variable, containing the number of binary zero
2425 bytes in the message body.
2427 33. The time of last modification of the "new" subdirectory is now used as the
2428 "mailbox time last read" when there is a quota error for a maildir
2431 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2433 35. Added +ignore_unknown as a special item in host lists.
2435 36. Code for decoding IPv6 addresses in host lists is now included, even if
2436 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2437 address was recognized as an IP address, but was then not correctly decoded
2438 into binary, causing unexpected and incorrect effects when compared with
2445 1. Very minor rewording of debugging text in manualroute to say "list of
2446 hosts" instead of "hostlist".
2448 2. If verify=header_syntax was set, and a header line with an unqualified
2449 address (no domain) and a large number of spaces between the end of the
2450 name and the colon was received, the reception process suffered a buffer
2451 overflow, and (when I tested it) crashed. This was caused by some obsolete
2452 code that should have been removed. The fix is to remove it!
2454 3. When running in the test harness, delay a bit after writing a bounce
2455 message to get a bit more predictability in the log output.
2457 4. Added a call to search_tidyup() just before forking a reception process. In
2458 theory, someone could use a lookup in the expansion of smtp_accept_max_
2459 per_host which, without the tidyup, could leave open a database connection.
2461 5. Added the variables $recipient_data and $sender_data which get set from a
2462 lookup success in an ACL "recipients" or "senders" condition, or a router
2463 "senders" option, similar to $domain_data and $local_part_data.
2465 6. Moved the writing of debug_print from before to after the "senders" test
2468 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2469 problems for message scanning, either using a data ACL, or using
2470 local_scan() because the Received: header was not generated till after they
2471 were called (in order to set the time as the time of reception completion).
2472 I have revised the way this works. The header is now generated after the
2473 body is received, but before the ACL or local_scan() are called. After they
2474 are run, the timestamp in the header is updated.
2480 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2481 before starting a queue runner without re-exec. This happened only when
2482 deliver_drop_privilege was set or when the Exim user was set to root. The
2483 effect of the bug was that timeouts during subsequent deliveries caused
2484 crashes instead of being properly handled. The handler is now left at its
2485 default (and expected) setting.
2487 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2488 message, again when deliver_drop_privilege is set or Exim is run as root.
2489 The bug described in (1) was not present in this case, but the tidying up
2490 of the other signals was missing. I have made the two cases consistent.
2492 3. The ignore_target_hosts setting on a manualroute router was being ignored
2493 for hosts that were looked up using the /MX notation.
2495 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2498 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2499 operated on the sender address. After changing the $sender_address to <>
2500 for the sender address verify, Exim was re-instated it as the original
2501 (before rewriting) address, but remembering that it had rewritten it, so it
2502 wasn't rewriting it again. This bug also had the effect of breaking the
2503 sender address verification caching when the sender address was rewritten.
2505 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2506 This has been changed so that if the ip literal address matches
2507 ignore_target_hosts, the router declines.
2509 7. Added expansion conditions match_domain, match_address, and match_local_
2510 part (NOT match_host).
2512 8. The placeholder for the Received: header didn't have a length field set.
2514 9. Added code to Exim itself and to exim_lock to test for a specific race
2515 condition that could lead to file corruption when using MBX delivery. The
2516 issue is with the lockfile that is created in /tmp. If this file is removed
2517 after a process has opened it but before that process has acquired a lock,
2518 there is the potential for a second process to recreate the file and also
2519 acquire a lock. This could lead to two Exim processes writing to the file
2520 at the same time. The added code performs the same test as UW imapd; it
2521 checks after acquiring the lock that its file descriptor still refers to
2522 the same named file.
2524 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2525 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2528 11. Added the smtp_active_hostname option. If used, this will typically be made
2529 to depend on the incoming interface address. Because $interface_address is
2530 not set up until the daemon has forked a reception process, error responses
2531 that can happen earlier (such as "too many connections") no longer contain
2534 12. If an expansion in a condition on a "warn" statement fails because a lookup
2535 defers, the "warn" statement is abandoned, and the next ACL statement is
2536 processed. Previously this caused the whole ACL to be aborted.
2538 13. Added the iplsearch lookup type.
2540 14. Added ident_timeout as a log selector.
2542 15. Added tls_certificate_verified as a log selector.
2544 16. Added a global option tls_require_ciphers (compare the smtp transport
2545 option of the same name). This controls incoming TLS connections.
2547 17. I finally figured out how to make tls_require_ciphers do a similar thing
2548 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2549 before starting the TLS session.
2551 18. Tabs are now shown as \t in -bP output.
2553 19. If the log selector return_path_on_delivery was set, Exim crashed when
2554 bouncing a message because it had too many Received: header lines.
2556 20. If two routers both had headers_remove settings, and the first one included
2557 a superfluous trailing colon, the final name in the first list and the
2558 first name in the second list were incorrectly joined into one item (with a
2559 colon in the middle).
2565 1. Added -C and -D options to the exinext utility, mainly to make it easier
2566 to include in the automated testing, but these could be helpful when
2567 multiple configurations are in use.
2569 2. The exinext utility was not formatting the output nicely when there was
2570 an alternate port involved in the retry record key, nor when there was a
2571 message id as well (for retries that were specific to a specific message
2572 and a specific host). It was also confused by IPv6 addresses, because of
2573 the additional colons they contain. I have fixed the IPv4 problem, and
2574 patched it up to do a reasonable job for IPv6.
2576 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2577 delivery, the log line now contains "pipelined" if PIPELINING was used.
2579 4. An SMTP transport process used to panic and die if the bind() call to set
2580 an explicit outgoing interface failed. This has been changed; it is now
2581 treated in the same way as a connect() failure.
2583 5. A reference to $sender_host_name in the part of a conditional expansion
2584 that was being skipped was still causing a DNS lookup. This no longer
2587 6. The def: expansion condition was not recognizing references to header lines
2588 that used bh_ and bheader_.
2590 7. Added the _cache feature to named lists.
2592 8. The code for checking quota_filecount in the appendfile transport was
2593 allowing one more file than it should have been.
2595 9. For compatibility with Sendmail, the command line option
2603 and sets the incoming protocol and host name (for trusted callers). The
2604 host name and its colon can be omitted when only the protocol is to be set.
2605 Note the Exim already has two private options, -pd and -ps, that refer to
2606 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2607 "s", but I don't think that's a major issue.
2609 10. A number of refactoring changes to the code, none of which should affect
2612 (a) The number of logging options was getting close to filling up the
2613 32-bit word that was used as a bit map. I have split them into two classes:
2614 those that are passed in the argument to log_write(), and those that are
2615 only ever tested independently outside of that function. These are now in
2616 separate 32-bit words, so there is plenty of room for expansion again.
2617 There is no change in the user interface or the logging behaviour.
2619 (b) When building, for example, log lines, the code previously used a
2620 macro that called string_cat() twice, in order to add two strings. This is
2621 not really sufficiently general. Furthermore, there was one instance where
2622 it was actually wrong because one of the argument was used twice, and in
2623 one call a function was used. (As it happened, calling the function twice
2624 did not affect the overall behaviour.) The macro has been replaced by a
2625 function that can join an arbitrary number of extra strings onto a growing
2628 (c) The code for expansion conditions now uses a table and a binary chop
2629 instead of a serial search (which was left over from when there were very
2630 few conditions). Also, it now recognizes conditions like "pam" even when
2631 the relevant support is not compiled in: a suitably worded error message is
2632 given if an attempt is made to use such a condition.
2634 11. Added ${time_interval:xxxxx}.
2636 12. A bug was causing one of the ddress fields not to be passed back correctly
2637 from remote delivery subprocesses. The field in question was not being
2638 subsequently used, so this caused to problems in practice.
2640 13. Added new log selectors queue_time and deliver_time.
2642 14. Might have fixed a bug in maildirsizefile handling that threw up
2643 "unexpected character" debug warnings, and recalculated the data
2644 unnecessarily. In any case, I expanded the warning message to give more
2647 15. Added the message "Restricted characters in address" to the statements in
2648 the default ACL that block characters like @ and % in local parts.
2650 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2651 Three changes have been made:
2653 (a) There was a serious bug; a negative response to MAIL caused the whole
2654 recipient domain to be cached as invalid, thereby blocking all messages
2655 to all local parts at the same domain, from all senders. This bug has
2656 been fixed. The domain is no longer cached after a negative response to
2657 MAIL if the sender used is not empty.
2659 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2662 (c) A new callout option, "use_sender" has been added for people who want
2663 the modified behaviour.
2669 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2672 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2673 indeed breaks things for older releases.
2675 3. Added additional logging to the case where there is a problem reading data
2676 from a filter that is running in a subprocess using a pipe, in order to
2677 try to track down a specific problem.
2679 4. Testing facility fudge: when running in the test harness and attempting
2680 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2681 getting "No route to host". Convert this to a timeout.
2683 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2686 6. Some OS don't have socklen_t but use size_t instead. This affects the
2687 fifth argument of getsockopt() amongst other things. This is now
2688 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2689 can be set for individual OS. I have set it for SunOS5, OSF1, and
2690 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2691 some earlier ones do not.
2693 7. Change 4.30/15 was not doing the test caselessly.
2695 8. The standard form for an IPv6 address literal was being rejected by address
2696 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2697 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2698 this, as well as the form without the "IPv6" on the front (but only when
2699 address literals are enabled, of course).
2701 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2703 10. Exim crashed if a message with an empty sender address specified by -f
2704 encountered a router with an errors_to setting. This could be provoked only
2705 by a command such as
2709 where an empty string was supplied; "<>" did not hit this bug.
2711 11. Installed PCRE release 4.5.
2713 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2714 remained set. It is now erased.
2716 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2717 times from message ids (which are base 36 rather than the normal 62).
2719 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2720 were being counted as actual protocol errors, and logged if the log
2721 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2722 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2723 and DATA following a set of rejected RCPTs do not count as protocol errors.
2724 In other words, Exim assumes they were pipelined, though this may not
2725 actually be the case. Of course, in all cases the client gets an
2726 appropriate error code.
2728 15. If a lookup fails in an ACL condition, a message about the failure may
2729 be available; it is used if testing the ACL cannot continue, because most
2730 such messages specify what the cause of the deferral is. However, some
2731 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2732 that caused an old message to be retained and used if a later statement
2733 caused a defer, replacing the real cause of the deferral.
2735 16. If an IP address had so many PTR records that the DNS lookup buffer
2736 was not large enough to hold them, Exim could crash while trying to process
2737 the truncated data. It now detects and logs this case.
2739 17. Further to 4.21/58, another change has been made: if (and only if) the
2740 first line of a message (the first header line) ends with CRLF, a bare LF
2741 in a subsequent header line has a space inserted after it, so as not to
2742 terminate the header.
2744 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2745 unnecessarily, used atoi() instead of strtol(), and didn't check the
2746 termination when getting file sizes from file names by regex.
2748 19. Completely re-implemented the support for maildirsize files, in the light
2749 of a number of problems with the previous contributed implementation
2750 (4.30/29). In particular:
2752 . If the quota is zero, the maildirsize file is maintained, but no quota is
2755 . If the maildir directory does not exist, it is created before any attempt
2756 to write a maildirsize file.
2758 . The quota value in the file is just a cache; if the quota is changed in
2759 the transport, the new value overrides.
2761 . A regular expression is available for excluding directories from the
2764 20. The autoreply transport checks the characters in options that define the
2765 message's headers; it allows continued headers, but it was checking with
2766 isspace() after an embedded newline instead of explicitly looking for a
2769 21. If all the "regular" hosts to which an address was routed had passed their
2770 expiry times, and had not reached their retry times, the address was
2771 bounced, even if fallback hosts were defined. Now Exim should go on to try
2774 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2775 equivalent code in the SMTP transport. Some hosts send humungous responses
2776 to HELO/EHLO, more than 1024 it seems.
2778 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2779 gives compiler warnings in some environments. I've now done it "properly",
2782 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2783 (because of problems with the built-in one) was declared to return uschar *
2784 instead of char *, causing compiler failure.
2786 25. Fixed a file descriptor leak when processing alias/forward files.
2788 26. Fixed a minor format string issue in dbfn.c.
2790 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2792 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2793 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2796 29. When a sender address is verified, it is cached, to save repeating the test
2797 when there is more than one recipient in a message. However, when the
2798 verification involves a callout, it is possible for different callout
2799 options to be set for different recipients. It is too complicated to keep
2800 track of this in the cache, so now Exim always runs a verification when a
2801 callout is required, relying on the callout cache for the optimization.
2802 The overhead is duplication of the address routing, but this should not be
2805 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2806 to be verified with callout=postmaster, and the main callout worked but the
2807 postmaster check failed, the verification correctly failed. However, if a
2808 subsequent RCPT command asked for sender verification *without* the
2809 postmaster check, incorrect caching caused this verification also to fail,
2812 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2813 it was not caching the DNS options (qualify_single, search_parents) that
2814 were used when the lookup failed. A subsequent lookup with different
2815 options therefore always gave the same answer, though there were cases
2816 where it should not have. (Example: a "domains = !$mx_any" option on a
2817 dnslookup router: the "domains" option is always processed without any
2818 widening, but the router might have qualify_single set.) Now Exim uses the
2819 cached value only when the same options are set.
2821 32. Added John Jetmore's "exipick" utility to the distribution.
2823 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2824 than a timeout (e.g. a certificate is required, and is not provided), an
2825 Exim server now closes the connection immediately. Previously it waited for
2826 the client to close - but if the client is SSL, it seems that they each
2827 wait for each other, leading to a delay before one of them times out.
2829 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2830 maintained 0.8.x compatibility because I don't think many are using it, and
2831 it is clearly obsolete.
2833 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2836 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2837 client certificate was expired. A simple patch fixes this, though I don't
2838 understand the full logic of why the verify callback is called multiple
2841 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2842 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2843 which causes problems with some clients (such as the Certicom SSL Plus
2844 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2845 disables the coutermeasure allowing Eudora to connect."
2847 38. Exim was not checking that a write() to a log file succeeded. This could
2848 lead to Bad Things if a log got too big, in particular if it hit a file
2849 size limit. Exim now panics and dies if it cannot write to a log file, just
2850 as it does if it cannot open a log file.
2852 39. Modified OS/Makefile-Linux so that it now contains
2854 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2856 The two -D definitions ensure that Exim is compiled with large file
2857 support, which makes it possible to handle log files that are bigger than
2860 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2861 instance) a domain was checked against a named list that involved a lookup,
2862 causing $domain_data to be set, then another domain was checked against the
2863 same list, then the first domain was re-checked, the value of $domain_data
2864 after the final check could be wrong. In particular, if the second check
2865 failed, it could be set empty. This bug probably also applied to
2868 41. The strip_trailing_dot option was not being applied to the address given
2869 with the -f command-line option.
2871 42. The code for reading a message's header from the spool was incrementing
2872 $received_count, but never initializing it. This meant that the value was
2873 incorrect (doubled) while delivering a message in the same process in which
2874 it was received. In the most common configuration of Exim, this never
2875 happens - a fresh exec is done - but it can happen when
2876 deliver_drop_privilege is set.
2878 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2879 it now includes up to 150 characters of the unexpected data in the log
2882 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2883 and building data strings. The size of both of these buffers was 10 000
2884 bytes - far larger than anybody would *ever* want, thought I. Needless to
2885 say, somebody hit the limit. I have increased the maximum line length to
2886 20 000 and the maximum data length of concatenated lines to 100 000. I have
2887 also fixed two bugs, because there was no checking on these buffers. Tsk,
2888 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2889 buffer is too small.
2891 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2892 lsearch lookups. Now it does.
2894 46. When parsing a route_list item in a manualroute router, a fixed-length
2895 buffer was used for the list of hosts. I made this 1024 bytes long,
2896 thinking that nobody would ever have a list of hosts that long. Wrong.
2897 Somebody had a whole pile of complicated expansion conditions, and the
2898 string was silently truncated, leading to an expansion error. It turns out
2899 that it is easier to change to an unlimited length (owing to other changes
2900 that have happened since this code was originally written) than to build
2901 structure for giving a limitation error. The length of the item that
2902 expands into the list of hosts is now unlimited.
2904 47. The lsearch lookup could not handle data where the length of text line was
2905 more than 4095 characters. Such lines were truncated, leading to shortened
2906 data being returned. It should now handle lines of any length.
2908 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2909 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2912 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2913 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2914 no longer happens in comment lines. A list of replacements is now placed
2915 at the head of all of the source files, except those whose only change is
2916 to replace PERL_COMMAND in the very first #! line.
2918 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2919 messages on the queue, with a bottom-up merge sort, using code contributed
2920 by Michael Haardt. This should make operations like -bp somewhat faster on
2921 large queues. It won't affect queue runners, except when queue_run_in_order
2924 51. Installed eximstats 1.31 in the distribution.
2926 52. Added support for SRV lookups to the dnslookup router.
2928 53. If an ACL referred to $message_body or $message_body_end, the value was not
2929 reset for any messages that followed in the same SMTP session.
2931 54. The store-handling optimization for building very long strings was not
2932 differentiating between the different store pools. I don't think this
2933 actually made any difference in practice, but I've tidied it.
2935 55. While running the routers to verify a sender address, $sender_address
2936 was still set to the sender address. This is wrong, because when routing to
2937 send a bounce to the sender, it would be empty. Therefore, I have changed
2938 it so that, while verifying a sender address, $sender_address is set to <>.
2939 (There is no change to what happens when verifying a recipient address.)
2941 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2942 target A or AAAA records (if not already returned) without resetting the
2943 qualify_single or search_parents options of the DNS resolver. These are
2944 inappropriate in this case because the targets of MX and SRV records must
2945 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2946 target that, when qualified, matched something in the local domain. These
2947 two options are now turned off when doing these lookups.
2949 57. It seems that at least some releases of Reiserfs (which does not have the
2950 concept of a fixed number of inodes) returns zero and not -1 for the
2951 number of available inodes. This interacted badly with check_spool_inodes,
2952 which assumed that -1 was the "no such thing" setting. What I have done is
2953 to check that the total number of inodes is greater than zero before doing
2954 the test of how many are available.
2956 58. When a "warn" ACL statement has a log_message modifier, the message is
2957 remembered, and not repeated. This is to avoid a lot of repetition when a
2958 message has many recipients that cause the same warning to be written.
2959 Howewer, Exim was preserving the list of already written lines for an
2960 entire SMTP session, which doesn't seem right. The memory is now reset if a
2961 new message is started.
2963 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2964 debugging output unless log_rewrite was also set.
2966 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2967 of (int)(handle) when we know that handle contains (void *)(-1).
2969 61. The Exim daemon panic-logs an error return when it closes the incoming
2970 connection. However "connection reset by peer" seems to be common, and
2971 isn't really an error worthy of noting specially, so that particular error
2974 62. When Exim is trying to find all the local interfaces, it used to panic and
2975 die if the ioctl to get the interface flags failed. However, it seems that
2976 on at least one OS (Solaris 9) it is possible to have an interface that is
2977 included in the list of interfaces, but for which you get a failure error
2978 for this call. This happens when the interface is not "plumbed" into a
2979 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2980 failure of the "get flags" call assumes that the interface is down.
2982 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2983 makes life easier for people who are doing arithmetic on fields extracted
2984 from dates, where you often get leading zeros that should not be
2985 interpreted as octal.
2987 64. Added qualify_domain to the redirect router, to override the global
2990 65. If a pathologically long header line contained very many addresses (the
2991 report of this problem mentioned 10 000) and each of them was rewritten,
2992 Exim could use up a very large amount of memory. (It kept on making new
2993 copies of the header line as it rewrote, and never released the old ones.)
2994 At the expense of a bit more processing, the header rewriting function has
2995 been changed so that it no longer eats memory in this way.
2997 66. The generation of the Received: header has been moved from the time that a
2998 message starts to be received, to the time that it finishes. The timestamp
2999 in the Received: header should now be very close to that of the <= log
3000 line. There are two side-effects of this change:
3002 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3003 logged header lines no longer include the local Received: line, because
3004 it has not yet been created. The same applies to a copy of the message
3005 that is returned to a non-SMTP sender when a message is rejected.
3007 (b) When a filter file is tested using -bf, no additional Received: header
3008 is added to the test message. After some thought, I decided that this
3011 This change does not affect the value of $received_for. It is still set
3012 after address rewriting, but before local_scan() is called.
3014 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3016 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3017 gave an unhelpful panic error message, and a defer error. I have managed to
3018 change this behaviour so that it now rejects any supplied certificate,
3019 which seems right, as the list of acceptable certificates is empty.
3021 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3022 gave an unhelpful defer error. I have not managed to make this reject any
3023 supplied certificates, but the error message it gives is "no certificate
3024 supplied", which is not helpful.
3026 70. exigrep's output now also includes lines that are not associated with any
3027 message, but which match the given pattern. Implemented by a patch from
3028 Martin Sluka, which also tidied up the Perl a bit.
3030 71. Recipient callout verification, like sender verification, was using <> in
3031 the MAIL FROM command. This isn't really the right thing, since the actual
3032 sender may affect whether the remote host accepts the recipient or not. I
3033 have changed it to use the actual sender in the callout; this means that
3034 the cache record is now keyed on a recipient/sender pair, not just the
3035 recipient address. There doesn't seem to be a real danger of callout loops,
3036 since a callout by the remote host to check the sender would use <>.
3037 [SEE ABOVE: changed after hitting problems.]
3039 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3040 temporary errors. However, in the case of such a code being given after
3041 the end of a data transmission (i.e. after ".") Exim was failing to write
3042 a retry record for the message. (Yes, there was some broken host that was
3043 actually sending 8xx at this point.)
3045 73. An unknown lookup type in a host list could cause Exim to panic-die when
3046 the list was checked. (An example that provoked this was putting <; in the
3047 middle of a list instead of at the start.) If this happened during a DATA
3048 ACL check, a -D file could be left lying around. This kind of configuration
3049 error no longer causes Exim to die; instead it causes a defer errror. The
3050 incident is still logged to the main and panic logs.
3052 74. Buglet left over from Exim 3 conversion. The message "too many messages
3053 in one connection" was written to the rejectlog but not the mainlog, except
3054 when address rewriting (yes!) was being logged.
3056 75. Added write_rejectlog option.
3058 76. When a system filter was run not as root (that is, when system_filter_user
3059 was set), the values of the $n variables were not being returned to the
3060 main process; thus, they were not subsequently available in the $sn
3063 77. Added +return_path_on_delivery log selector.
3065 78. A connection timeout was being treated differently from recipients deferred
3066 when testing hosts_max_try with a message that was older than the host's
3067 retry timeout. (The host should not be counted, thus allowing all hosts to
3068 be tried at least once before bouncing.) This may have been the cause of an
3069 occasionally reported bug whereby a message would remain on the queue
3070 longer than the retry timeout, but would be bounced if a delivery was
3071 forced. I say "may" because I never totally pinned down the problem;
3072 setting up timeout/retry tests is difficult. See also the next item.
3074 79. The ultimate address timeout was not being applied to errors that involved
3075 a combination of host plus message (for example, a timeout on a MAIL
3076 command). When an address resolved to a number of possible hosts, and they
3077 were not all tried for each delivery (e.g. because of hosts_max_try), a
3078 message could remain on the queue longer than the retry timeout.
3080 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3083 81. Fixed an obscure SMTP outgoing bug which required at least the following
3084 conditions: (a) there was another message waiting for the same server;
3085 (b) the server returned 5xx to all RCPT commands in the first message so
3086 that the message was not completed; (c) the server dropped the connection
3087 or gave a negative response to the RSET that Exim sends to abort the
3088 transaction. The observed case was a dropped connection after DATA that had
3089 been sent in pipelining mode. That is, the server had advertised PIPELINING
3090 but was not implementing it correctly. The effect of the bug was incorrect
3091 behaviour, such as trying another host, and this could lead to a crash.
3097 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3098 and daemon.c were passed as pointers to ints; they should have been
3099 pointers to socklen_t variables (which are typically unsigned ints).
3101 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3104 3. Fixed a really odd bug that affected only the testing scheme; patching a
3105 certain fixed string in the binary changed the value of another string that
3106 happened to be identical to the end of the original first string.
3108 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3109 name", it returns that address as the IP address. On some operating
3110 systems (e.g. Solaris), it also passes back the IP address string as the
3111 "host name". However, on others (e.g. Linux), it passes back an empty
3112 string. Exim wasn't checking for this, and was changing the host name to an
3113 empty string, assuming it had been canonicized.
3115 5. Although rare, it is permitted to have more than one PTR record for a given
3116 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3117 all the names associated with an address, because they do in Solaris.
3118 However, it seems that they do not in Linux for data that comes from the
3119 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3120 I found this out when I moved to a new Linux workstation and tried to run
3121 the Exim test suite.
3123 To get round this problem I have changed the code so that it now does its
3124 own call to the DNS to look up PTR records when searching for a host name.
3125 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3126 addresses that are only in /etc/hosts are still found.
3128 This behaviour is, however, controlled by an option called host_lookup_
3129 order, which defaults to "bydns:byaddr". If people want to use the other
3130 order, or indeed, just use one or the other means of lookup, they can
3131 specify it in this variable.
3133 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3134 some operating systems, this comes back from gethostbyaddr() as an empty
3135 string, and this is what Exim used to test for. However, it seems that in
3136 other systems, "." is yielded. Exim now tests for this case too.
3138 7. The values of check_spool_space and check_log_space are now held internally
3139 as a number of kilobytes instead of an absolute number of bytes. If a
3140 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3141 kilobyte. This means that much larger values can be stored.
3143 8. Exim monitor: an attempt to get the action menu when not actually pointing
3144 at a message produces an empty menu entitled "No message selected". This
3145 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3146 no entries in it ("Shell widget menu has zero width and/or height"). So I
3147 have added a single, blank menu entry in this case.
3149 9. Added ${quote_local_part.
3151 10. MIME decoding is now applied to the contents of Subject: header lines when
3154 11. Now that a reference to $sender_host_address automatically causes a reverse
3155 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3156 host lookup before query-style lookups in lists that might use this
3157 variable. This has therefore been abolished, and the "net-" prefix is no
3158 longer necessary for query-style lookups.
3160 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3161 have been a typo for LFLAGS, so it has been changed.
3163 13. The install script calls Exim with "-C /dev/null" in order to find the
3164 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3165 to be output. Howeve, since Exim outputs its version number before the
3166 error, it didn't break the script. It just looked ugly. I fixed this by
3167 always allowing "-C /dev/null" if the caller is root.
3169 14. Ignore overlarge ACL variable number when reading spool file - insurance
3170 against a later release with more variables having written the file.
3172 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3173 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3174 this, as well as the form without the "IPv6" on the front.
3176 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3177 OS/Makefile-Darwin file.
3179 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3180 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3182 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3183 variable. However, some OS use ints for inodes. I've added cast to long int
3184 to get rid of the compiler warning.
3186 19. I had forgotten to lock out "/../" in configuration file names when
3187 ALT_CONFIG_PREFIX was set.
3189 20. Routers used for verification do not need to specify transports. However,
3190 if such a router generated a host list, and callout was configured, Exim
3191 crashed, because it could not find a port number from the (non-existent)
3192 transport. It now assumes port 25 in this circumstance.
3194 21. Added the -t option to exigrep.
3196 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3197 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3198 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3199 them is set, LOOKUP_LSEARCH is forced.
3201 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3203 24. Added sender and host information to the "rejected by local_scan()" log
3204 line; previously there was no indication of these.
3206 25. Added .include_if_exists.
3208 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3209 Linux. It turns out that not all file systems support this. Apparently some
3210 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3211 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3212 not supported on the file descriptor, is now ignored when Exim is trying to
3213 sync a directory. This applies only to Linux.
3215 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3217 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3218 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3221 29. Added support for maildirsize files from supplied patch (modified a bit).
3223 30. The use of :fail: followed by an empty string could lead Exim to respond to
3224 sender verification failures with (e.g.):
3226 550 Verification failed for <xxx>
3227 550 Sender verify failed
3229 where the first response line was missing the '-' that indicates it is not
3230 the final line of the response.
3232 31. The loop for finding the name of the user that called Exim had a hardwired
3233 limit of 10; it now uses the value of finduser_retries, which is used for
3234 all other user lookups.
3236 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3239 33. Exim was neglecting to zero errno before one call of strtol() when
3240 expanding a string and expecting an integer value. On some systems this
3241 resulted in spurious "integer overflow" errors. Also, it was casting the
3242 result into an int without checking.
3244 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3245 did not work. The code looks as if it has *never* worked, though it appears
3246 to have been documented since at least releast 1.62. I have made it work.
3248 35. The "timeout_DNS" error in retry rules, also documented since at least
3249 1.62, also never worked. As it isn't clear exactly what this means, and
3250 clearly it isn't a major issue, I have abolished the feature by treating it
3251 as "timeout", and writing a warning to the main and panic logs.
3253 36. The display of retry rules for -brt wasn't always showing the error code
3256 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3257 timeout_connect_A, timeout_connect_MX.
3259 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3260 to the empty sender.
3262 39. The daemon was not analysing the content of -oX till after it had closed
3263 stderr and disconnected from the controlling terminal. This meant that any
3264 syntax errors were only noted on the panic log, and the return code from
3265 the command was 0. By re-arranging the code a little, I've made the
3266 decoding happen first, so such errors now appear on stderr, and the return
3267 code is 1. However, the actual setting up of the sockets still happens in
3268 the disconnected process, so errors there are still only recorded on the
3271 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3272 connections (as happens on some IP stacks) was logged at start up time as
3273 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3274 it from "IPv6 and IPv4", which means that two separate sockets are being
3277 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3278 says whether AF_INET or AF_INET6 was passed as an argument.
3280 42. Exiwhat output was messed up when time zones were included in log
3283 43. Exiwhat now gives more information about the daemon's listening ports,
3284 and whether -tls-on-connect was used.
3286 44. The "port" option of the smtp transport is now expanded.
3288 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3289 silently ignored. Now an error message is written to the main and panic
3292 46. There's a new ACL modifier called "logwrite" which writes to a log file
3293 as soon as it is encountered.
3295 47. Added $local_user_uid and $local_user_gid at routing time.
3297 48. Exim crashed when trying to verify a sender address that was being
3300 49. Exim was recognizing only a space character after ".include". It now also
3301 recognizes a tab character.
3303 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3304 extracting the relevant information from the specification. The man page no
3305 longer contains scrambled data for the -d option, and I've added a section
3306 at the front about calling Exim under different names.
3308 51. Added "extra_headers" argument to the "mail" command in filter files.
3310 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3313 53. Installed eximstats 1.29.
3315 54. Added transport_filter_timeout as a generic transport option.
3317 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3318 Cc: header lines. This was required by RFC 822, but it not required by RFC
3321 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3322 incoming messages that did not have them. Now it does so only if the
3323 message originates locally, that is, if there is no associated remote host
3324 address. When Resent- header lines are present, this applies to the Resent-
3325 lines rather than the non-Resent- lines.
3327 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3328 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3330 58. Messages for configuration errors now include the name of the main
3331 configuration file - useful now that there may be more than one file in a
3332 list (.included file names were always shown).
3334 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3335 for those rare installations that do not start the daemon as root or run it
3336 setuid root. I've cut out the call to initgroups() if the daemon is not
3339 60. The Exim user and group can now be bound into the binary as text strings
3340 that are looked up at the start of Exim's processing.
3342 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3344 62. Added $mailstore_basename variable.
3346 63. Installed patch to sieve.c from Michael Haardt.
3348 64. When Exim failed to open the panic log after failing to open the main log,
3349 the original message it was trying to log was written to stderr and debug
3350 output, but if they were not available (the usual case in production), it
3351 was lost. Now it is written to syslog before the two lines that record the
3352 failures to open the logs.
3354 65. Users' Exim filters run in subprocesses under the user's uid. It is
3355 possible for a "deliver" command or an alias in a "personal" command to
3356 provoke an address rewrite. If logging of address rewriting is configured,
3357 this fails because the process is not running as root or exim. There may be
3358 a better way of dealing with this, but for the moment (because 4.30 needs
3359 to be released), I have disabled address rewrite logging when running a
3360 filter in a non-root, non-exim process.
3366 1. The buildconfig auxiliary program wasn't quoting the value set for
3367 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3368 not defined. This bug was masked in 4.22 by the effect that was fixed in
3371 2. Some messages that were rejected after a message id was allocated were
3372 shown as "incomplete" by exigrep. It no longer does this for messages that
3373 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3375 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3376 have allow_domain_literals set, the ID did not get logged in the <= line.
3377 Domain literals are now always recognized in Message-ID: header lines.
3379 4. The first argument for a ${extract expansion item is the key name or field
3380 number. Leading and trailing spaces in this item were not being ignored,
3381 causing some misleading effects.
3383 5. When deliver_drop_privilege was set, single queue runner processes started
3384 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3385 same command in the process it spins off) were not dropping privilege.
3387 6. When the daemon running as "exim" started a queue runner, it always
3388 re-executed Exim in the spun-off process. This is a waste of effort when
3389 deliver_drop_privilege is set. The new process now just calls the
3390 queue-runner function directly.
3396 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3399 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3400 ignored. Though the use of -oP was forcing the writing of a pid file, it
3401 was always written to the default place.
3403 3. If the message "no IP address found for host xxxx" is generated during
3404 incoming verification, it is now followed by identification of the incoming
3405 connection (so you can more easily find what provoked it).
3407 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3409 5. Added some features to "harden" Exim a bit more against certain attacks:
3411 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3412 be put in Local/Makefile. This is like the never_users runtime option,
3413 but it cannot be overridden. The default setting is "root".
3415 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3416 prefix string with which any file named in a -C command line option
3419 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3420 is retained for -C and -D only if the caller of Exim is root. Without
3421 it, the exim user may also use -C and -D and retain privilege.
3423 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3424 command line option is disabled.
3426 6. Macro names set by the -D option must start with an upper case letter, just
3427 like macro names defined in the configuration file.
3429 7. Added "dereference=" facility to LDAP.
3431 8. Two instances of the typo "uknown" in the source files are fixed.
3433 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3434 the Configure-Makefile script screwed up while processing it.
3436 10. Incorporated PCRE 4.4.
3438 11. The SMTP synchronization check was not operating right at the start of an
3439 SMTP session. For example, it could not catch a HELO sent before the client
3440 waited for the greeting. There is now a check for outstanding input at the
3441 point when the greeting is written. Because of the duplex, asynchronous
3442 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3443 way, but not yet received, when the check is performed.
3445 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3446 on TCP/IP sockets, because this apparently causes some broken clients to
3449 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3450 unchanged) from the Cygwin maintainer.
3452 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3453 was supported instead of testing for mbx. Effectively a typo.
3455 15. The spa authenticator server code was not checking that the input it
3456 received was valid base64.
3458 16. The debug output line for the "set" modifier in ACLs was not showing the
3459 name of the variable that was being set.
3461 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3463 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3464 lookup on its own. Something else was needed to trigger the lookup. For
3465 example, a match in host_lookup or the need for a host name in a host list.
3466 Now, if $sender_host_name is referenced and the host name has not yet been
3467 looked up, a lookup is performed. If the lookup fails, the variable remains
3468 empty, and $host_lookup_failed is set to "1".
3470 19. Added "eqi" as a case-independent comparison operator.
3472 20. The saslauthd authentication condition could segfault if neither service
3473 nor realm was specified.
3475 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3476 error message that was logged was misleading, and incoming SMTP
3477 connections were dropped. The message is now more accurate, and temporary
3478 errors are given to SMTP connections.
3480 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3481 (except RSET) with a 421 error, until QUIT is received. However, it was
3482 failing to send a response to QUIT.
3484 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3485 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3486 ACL is now run after the helo_try_verify_hosts code.
3488 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3489 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3490 case-independent, so other case variants are also recognized). Apparently
3491 some systems use these upper case variants.
3493 25. If more than two messages were waiting for the same host, and a transport
3494 filter was specified for the transport, Exim sent two messages over the
3495 same TCP/IP connection, and then failed with "socket operation on non-
3496 socket" when it tried to send the third.
3498 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3500 27. The extern definition of crypt16() in expand.c was not being excluded when
3501 the OS had its own crypt16() function.
3503 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3504 as a preferred synonym for return_size_limit, both as an option and as an
3507 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3509 30. Changed the default configuration ACL to relax the local part checking rule
3510 for addresses that are not in any local domains. For these addresses,
3511 slashes and pipe symbols are allowed within local parts, but the sequence
3512 /../ is explicitly forbidden.
3514 31. SPA server authentication was not clearing the challenge buffer before
3517 32. log_message in a "warn" ACL statement was writing to the reject log as
3518 well as to the main log, which contradicts the documentation and doesn't
3519 seem right (because no rejection is happening). So I have stopped it.
3521 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3522 However, I am unable to do any testing of this.
3524 34. Fixed an infelicity in the appendfile transport. When checking directories
3525 for a mailbox, to see if any needed to be created, it was accidentally
3526 using path names with one or more superfluous leading slashes; tracing
3527 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3529 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3530 contents are added to the log line that is written for every discarded
3531 recipient. (Previously a log_message setting was ignored.)
3533 36. The ${quote: operator now quotes the string if it is empty.
3535 37. The install script runs exim in order to find its version number. If for
3536 some reason other than non-existence or emptiness, which it checks, it
3537 could not run './exim', it was installing it with an empty version number,
3538 i.e. as "exim-". This error state is now caught, and the installation is
3541 38. An argument was missing from the function that creates an error message
3542 when Exim fails to connect to the socket for saslauthd authentication.
3543 This could cause Exim to crash, or give a corrupted message.
3545 39. Added isip, isip4, and isip6 to ${if conditions.
3547 40. The ACL variables $acl_xx are now saved with the message, and can be
3548 accessed later in routers, transports, and filters.
3550 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3551 strings in the file are not string-expanded.
3553 42. If a MAIL command specified a SIZE value that was too large to fit into an
3554 int variable, the check against message_size_limit failed. Such values are
3555 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3556 day this will have to be increased, but I don't think I want to be around
3557 when emails are that large.
3564 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3565 iconv() is not standard in FreeBSD.
3567 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3568 IPv6 enabled. The observed symptom was a segmentation fault on return from
3569 the function os_common_find_running_interfaces() in src/os.c.
3571 3. In the check_special_case() function in daemon.c I had used "errno" as an
3572 argument name, which causes warnings on some systems. This was basically a
3573 typo, since it was named "eno" in the comments!
3575 4. The code that waits for the clock to tick (at a resolution of some fraction
3576 of a second) so as to ensure message-id uniqueness was always waiting for
3577 at least one whole tick, when it could have waited for less. [This is
3578 almost certainly not relevant at current processor speeds, where it is
3579 unlikely to ever wait at all. But we try to future-proof.]
3581 5. The function that sleeps for a time interval that includes fractions of a
3582 second contained a race. It did not block SIGALRM between setting the
3583 timer, and suspending (a couple of lines later). If the interval was short
3584 and the sigsuspend() was delayed until after it had expired, the suspension
3585 never ended. On busy systems this could lead to processes getting stuck for
3588 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3589 process, before it forks any delivery processes. The open lookup caching
3590 mechanism meant that the open file or database connection was passed into
3591 the delivery process. The problem was that delivery processes always tidy
3592 up cached lookup data. This could cause a problem for the next delivery
3593 process started by the queue runner, because the external queue runner
3594 process does not know about the closure. So the next delivery process
3595 still has data in the lookup cache. In the case of a file lookup, there was
3596 no problem because closing a file descriptor in a subprocess doesn't affect
3597 the parent. However, if the lookup was caching a connection to a database,
3598 the connection was closed, and the second delivery process was likely to
3599 see errors such as "PGSQL: query failed: server closed the connection
3600 unexpectedly". The problem has been fixed by closing all cached lookups
3601 in a queue runner before running a delivery process.
3603 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3604 seem to have the "const" qualifier which it has on other OS. I've
3607 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3608 *of the same type* (client or server) with the same public name that an
3609 error should be diagnosed.
3611 9. When Exim looked up a host name for an IP address, but failed to find the
3612 original IP address when looking up the host name (a safety check), it
3613 output the message "<ip address> does not match any IP for NULL", which was
3614 confusing, to say the least. The bug was that the host name should have
3615 appeared instead of "NULL".
3617 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3618 user that is built into the binary, and the -C or -D options is used, root
3619 privilege is dropped before the configuration file is read. In addition,
3620 logging is switched to stderr instead of the normal log files. If the
3621 configuration then re-defines the Exim user, the unprivileged environment
3622 is probably not what is expected, so Exim logs a panic warning message (but
3625 However, if deliver_drop_privilege is set, the unprivileged state may well
3626 be exactly what is intended, so the warning has been cut out in that case,
3627 and Exim is allowed to try to write to its normal log files.
3633 1. smtp_return_error_details was not giving details for temporary sender
3634 or receiver verification errors.
3636 2. Diagnose a configuration error if two authenticators have the same public
3639 3. Exim used not to create the message log file for a message until the first
3640 delivery attempt. This could be confusing when incoming messages were held
3641 for policy or load reasons. The message log file is now created at the time
3642 the message is received, and an initial "Received" line is written to it.
3644 4. The automatically generated man page for command line options had a minor
3645 bug that caused no ill effects; however, a more serious problem was that
3646 the procedure for building the man page automatically didn't always
3647 operate. Consequently, release 4.20 contains an out-of-date version. This
3648 shouldn't happen again.
3650 5. When building Exim with embedded Perl support, the script that builds the
3651 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3652 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3654 6. The freeze_tell option was not being used for messages that were frozen on
3655 arrival, either by an ACL or by local_scan().
3657 7. Added the smtp_incomplete_transaction log selector.
3659 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3660 was accepting AUTH without a new EHLO.
3662 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3663 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3666 10. Logging of TCP/IP connections (when configured) now happens in the main
3667 daemon process instead of the child process, so that the TCP/IP connection
3668 count is more accurate (but it can never be perfect).
3670 11. The use of "drop" in a nested ACL was not being handled correctly in the
3671 outer ACL. Now, if condition failure induced by the nested "drop" causes
3672 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3673 or "require"), the connection is dropped.
3675 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3676 that yield "discard" can now be used with an "accept" or a "discard" verb,
3677 but an error is generated for any others (because I can't see a useful way
3678 to define what should happen).
3680 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3681 are now processed in the same way as lines in the Exim configuration file.
3682 In particular, continuation lines are supported.
3684 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3686 15. Added -ti meaning -t -i.
3688 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3689 domains, and warn by logging if others are found.
3691 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3692 returned from GIFCONF when Exim is trying to find the list of interfaces on
3693 a host. The code in os.c has been modified to copy each ifreq to an aligned
3694 structure in all cases.
3696 Also, in some cases, the returned ifreq's were being copied to a 'struct
3697 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3698 means the last couple of bytes of an IPv6 address could be chopped if the
3699 ifreq contained only a normal sockaddr (14 bytes storage).
3701 18. Named domain lists were not supported in the hosts_treat_as_local option.
3702 An entry such as +xxxx was not recognized, and was treated as a literal
3705 19. Ensure that header lines added by a DATA ACL are included in the reject log
3706 if the ACL subsequently rejects the message.
3708 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3709 MD5 (which is deprecated).
3711 21. When testing a filter file using -bf, Exim was writing a message when it
3712 took the sender from a "From " line in the message, but it was not doing so
3713 when it took $return_path from a Return-Path: header line. It now does.
3715 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3716 with a valid header line field name (a series of printing characters
3717 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3719 23. Changed "disc" in the source to "disk" to conform to the documentation and
3720 the book and for uniformity.
3722 24. Ignore Sendmail's -Ooption=value command line item.
3724 25. When execve() failed while trying to run a command in a pipe transport,
3725 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3726 could be confused with a return value of 69 from the command itself. This
3727 has been changed to 127, the value the shell returns if it is asked to run
3728 a non-existent command. The wording for the related log line suggests a
3729 non-existent command as the problem.
3731 26. If received_header_text expands to an empty string, do not add a Received:
3732 header line to the message. (Well, it adds a token one on the spool, but
3733 marks it "old" so that it doesn't get used or transmitted.)
3735 27. Installed eximstats 1.28 (addition of -nt option).
3737 28. There was no check for failure on the call to getsockname() in the daemon
3738 code. This can fail if there is a shortage of resources on the system, with
3739 ENOMEM, for example. A temporary error is now given on failure.
3741 29. Contrary to the C standard, it seems that in some environments, the
3742 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3743 program. Exim now does this explicitly; it affects the formatting of
3744 timestamps using strftime().
3746 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3747 complaints. I've now initialized all the variables, to avoid this.
3749 32. Header lines added by a system filter were not being "seen" during
3750 transport-time rewrites.
3752 33. The info_callback() function passed to OpenSSL is set up with type void
3753 (*)(SSL *, int, int), as described somewhere. However, when calling the
3754 function (actually a macro) that sets it up, the type void(*)() is
3755 expected. I've put in a cast to prevent warnings from picky compilers.
3757 34. If a DNS black list lookup found a CNAME record, but there were no A
3758 records associated with the domain it pointed at, Exim crashed.
3760 35. If a DNS black list lookup returned more than one A record, Exim ignored
3761 all but the first. It now scans all returned addresses if a particular IP
3762 value is being sought. In this situation, the contents of the
3763 $dnslist_value variable are a list of all the addresses, separated by a
3766 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3767 to accept a host name and all its aliases if the forward lookup for any of
3768 them yielded the IP address of the incoming connection. Now it accepts only
3769 those names whose forward lookup yields the correct IP address. Any other
3770 names are discarded. This closes a loophole whereby a rogue DNS
3771 administrator could create reverse DNS records to break through a
3772 wildcarded host restriction in an ACL.
3774 37. If a user filter or a system filter that ran in a subprocess used any of
3775 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3776 the wrong values were passed to the pipe command ($thisaddress had the
3777 value of $0, $0 had the value of $1, etc). This bug was introduced by
3778 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3780 38. Improved the line breaking for long SMTP error messages from ACLs.
3781 Previously, if there was no break point between 40 and 75 characters, Exim
3782 left the rest of the message alone. Two changes have been made: (a) I've
3783 reduced the minimum length to 35 characters; (b) if it can't find a break
3784 point between 35 and 75 characters, it looks ahead and uses the first one
3785 that it finds. This may give the occasional overlong line, but at least the
3786 remaining text gets split now.
3788 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3789 file descriptors might be low, and that setting 1000 would always raise it.
3790 It turns out that in some environments, the limit is already over 1000 and
3791 that lowering it causes trouble. So now Exim takes care not to decrease it.
3793 40. When delivering a message, the value of $return_path is set to $sender_
3794 address at the start of routing (routers may change the value). By an
3795 oversight, this default was not being set up when an address was tested by
3796 -bt or -bv, which affected the outcome if any router or filter referred to
3799 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3800 log only when "message" or "log_message" are set. However, if one of the
3801 conditions was an address verification, or a call to a nested ACL, the
3802 messages generated by the underlying test were being passed through. This
3803 no longer happens. The underlying message is available in $acl_verify_
3804 message for both "message" and "log_message" expansions, so it can be
3805 passed through if needed.
3807 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3808 new expansion $bh_ to give the encoded byte string without charset
3809 translation. Translation happens only if iconv() is available; HAVE_ICONV
3810 indicates this at build time. HEADERS_CHARSET gives the charset to
3811 translate to; headers_charset can change it in the configuration, and
3812 "headers charset" can change it in an individual filter file.
3814 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3815 that creates RFC 2047 encoded "words" labels them as that charset instead
3816 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3817 expansion operator; (ii) when Exim creates a From: line for a local
3818 message; (iii) when a header line is rewritten to include a "phrase" part.
3820 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3821 buggy, causing it to skip the first lines of messages whose message ID
3822 ended in 'D'. This would not have bitten before Exim release 4.14, because
3823 message IDs were unlikely to end in 'D' before then. The effect was to have
3824 incorrect size information for certain domains.
3826 45. #include "config.h" was missing at the start of the crypt16.c module. This
3827 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3830 46. If there was a timeout during a "random" callout check, Exim treated it as
3831 a failure of the random address, and carried on sending RSET and the real
3832 address. If the delay was just some slowness somewhere, the response to the
3833 original RCPT would be taken as a response to RSET and so on, causing
3834 mayhem of various kinds.
3836 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3837 when I implemented it. It didn't allow for the fact that some option values
3838 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3839 the right test for positive values.
3841 48. Domain names in DNS records are case-independent. Exim always looks them up
3842 in lower case. Some resolvers return domain names in exactly the case they
3843 appear in the zone file, that is, they may contain uppercase letters. Not
3844 all resolvers do this - some return always lower case. Exim was treating a
3845 change of case by a resolver as a change of domain, similar to a widening
3846 of a domain abbreviation. This triggered its re-routing code and so it was
3847 trying to route what was effectively the same domain again. This normally
3848 caused routing to fail (because the router wouldn't handle the domain
3849 twice). Now Exim checks for this case specially, and just changes the
3850 casing of the domain that it ultimately uses when it transmits the message
3853 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3856 50. If a filter generated a file delivery with a non-absolute name (possible if
3857 no home directory exists for the router), the forbid_file option was not
3860 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3861 the existing equality matching.
3863 52. Exim was using ints instead of ino_t variables in some places where it was
3864 dealing with inode numbers.
3866 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3867 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3868 called TMPDIR, and if it finds it is different, it changes its value.
3870 54. The smtp_printf() function is now made available to local_scan() so
3871 additional output lines can be written before returning. There is also an
3872 smtp_fflush() function to enable the detection of a dropped connection.
3873 The variables smtp_input and smtp_batched_input are exported to
3876 55. Changed the default runtime configuration: the message "Unknown user"
3877 has been removed from the ACL, and instead placed on the localuser router,
3878 using the cannot_route_message feature. This means that any verification
3879 failures that generate their own messages won't get overridden. Similarly,
3880 the "Unrouteable address" message that was in the ACL for unverifiable
3881 relay addresses has also been removed.
3883 56. Added hosts_avoid_esmtp to the smtp transport.
3885 57. The exicyclog script was not checking for the esoteric option
3886 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3887 will work only if exicyclog is run under the appropriate euid.
3889 58. Following a discussion on the list, the rules by which Exim recognises line
3890 endings on incoming messages have been changed. The -dropcr and drop_cr
3891 options are now no-ops, retained only for backwards compatibility. The
3892 following line terminators are recognized: LF CRLF CR. However, special
3893 processing applies to CR:
3895 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3896 nor a local message in the state where . is a terminator.
3898 (ii) If a bare CR is encountered in a header line, an extra space is added
3899 after the line terminator so as not to end the header. The reasoning
3900 behind this is that bare CRs in header lines are most likely either
3901 to be mistakes, or people trying to play silly games.
3903 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3904 was being incorrectly given as 18 bytes larger than it should have been.
3905 This is a VOB (very old bug).
3907 60. This may never have affected anything current, but just in case it has:
3908 When the local host is found other than at the start of a list of hosts,
3909 the local host, those with the same MX, and any that follow, are discarded.
3910 When the list in question was part of a longer list of hosts, the following
3911 hosts (not currently being processed) were also being discarded. This no
3912 longer happens. I'm not sure if this situation could ever has previously
3915 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3918 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3919 header. This is something that is recommended in a new Internet Draft, and
3920 is something that is documented as being done by Sendmail. There are two
3921 possible values. For messages generated by the autoreply transport, Exim
3924 Auto-Submitted: auto-replied
3926 whereas for all other generated messages (e.g. bounces) it adds
3928 Auto-Submitted: auto-generated
3930 63. The "personal" condition in filters now includes a test for the
3931 Auto-Submitted: header. If it contains the string "auto-" the message it
3932 not considered personal.
3934 64. Added rcpt_include_affixes as a generic transport option.
3936 65. Added queue_only_override (default true).
3938 66. Added the syslog_duplication option.
3940 67. If what should have been the first header line of a message consisted of
3941 a space followed by a colon, Exim was mis-interpreting it as a header line.
3942 It isn't of course - it is syntactically invalid and should therefore be
3943 treated as the start of the message body. The misbehaviour could have
3944 caused a number of strange effects, including loss of data in subsequent
3945 header lines, and spool format errors.
3947 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3948 client host had authenticated. This control can now be exercised by an ACL
3949 for more flexibility.
3951 69. By default, callouts do not happen when testing with -bh. There is now a
3952 variant, -bhc, which does actually run the callout code, including
3953 consulting and updating the callout cache.
3955 70. Added support for saslauthd authentication, courtesy of Alexander
3958 71. If statvfs() failed on the spool or log directories while checking their
3959 size for availability, Exim confusingly gave the error "space shortage".
3960 Furthermore, in debugging mode it crashed with a floating point exception.
3961 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3962 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3963 serious problem, Exim now writes to the main and panic logs when this
3964 happens, with details of the failure. It then refuses to accept the
3965 incoming message, giving the message "spool directory problem" or "log
3966 directory problem" with a 421 code for SMTP messages.
3968 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3969 0, 1, and 2 exist, because some OS complain for execs without them (see
3970 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3971 descriptors. However, the code omitted to check that the open succeeded,
3972 causing mysterious errors if for some reason the permissions on /dev/null
3973 got screwed. Now Exim writes a message to the main and panic logs, and
3974 bombs out if it can't open /dev/null.
3976 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3977 interact so that it is all more flexible. It is supposed to remain
3978 backwards compatible. Also added extra_local_interfaces.
3980 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3981 to bomb out with an assertion failure - to the client this appears as a
3982 connection drop. This problem occurs in the part of the code that was taken
3983 from the Samba project. Fortunately, the assertion is in a very simple
3984 function, so I have fixed this by reproducing the function inline in the
3985 one place where it is called, and arranging for authentication to fail
3986 instead of killing the process with assert().
3988 75. The SPA client code was not working when the server requested OEM rather
3989 than Unicode encoding.
3991 76. Added code to make require_files with a specific uid setting more usable in
3992 the case where statting the file as root fails - usually a non-root-mounted
3993 NFS file system. When this happens and the failure is EACCES, Exim now
3994 forks a subprocess and does the per-uid checking as the relevant uid.
3996 77. Added process_log_path.
3998 78. If log_file_path was not explicitly set, a setting of check_log_space or
3999 check_log_inodes was ignored.
4001 79. If a space check for the spool or log partitions fails, the incident is now
4002 logged. Of course, in the latter case the data may get lost...
4004 80. Added the %p formatting code to string_format() so that it can be used to
4005 print addresses in debug_print(). Adjusted all the address printing in the
4006 debugging in store.c to use %p rather than %d.
4008 81. There was a concern that a line of code in smtp_in.c could overflow a
4009 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4010 initially expressed, the concern was not well-founded, because trailing
4011 spaces are removed early. However, if the trailing spaces were followed by
4012 a NULL, they did not get removed, so the overflow was possible. Two fixes
4015 (a) I re-wrote the offending code in a cleaner fashion.
4016 (b) If an incoming SMTP command contains a NULL character, it is rejected
4019 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4020 runs initgroups(), so that if the Exim user is in any additional groups,
4021 they will be used during message reception.
4027 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob