1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.362 2006/06/28 13:59:12 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).
52 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
59 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
60 other effects) broke the use of negated acl sub-conditions.
62 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
65 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
66 "Deny" causes Exim to reject the incoming connection with a 554 error.
67 Unfortunately, if there is a major crisis, such as a disk failure,
68 tcp-wrappers gives "deny", whereas what one would like would be some
69 kind of temporary error. A kludge has been added to help with this.
70 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
71 554 error is used if errno is still zero or contains ENOENT (which occurs
72 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
75 PH/03 Add -lutil to the default FreeBSD LIBS setting.
77 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
78 errors. Otherwise a message that provokes a temporary error (when other
79 messages do not) can cause a whole host to time out.
81 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
82 addresses were routed directly to files or pipes from a redirect router.
83 File deliveries just didn't batch; pipe deliveries might have suffered
86 PH/06 A failure to get a lock for a hints database would erroneously always say
87 "Failed to get write lock", even when it was really a read lock.
89 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
90 of 0600. This has been changed to use the value of the lockfile_mode
91 option (which defaults to 0600).
93 PH/08 Applied small patch from the Sieve maintainer.
95 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
96 folder from quota calculations, a direct delivery into this folder messed
97 up the contents of the maildirsize file. This was because the regex was
98 used only to exclude .Trash (or whatever) when the size of the mailbox
99 was calculated. There was no check that a delivery was happening into an
100 excluded directory. This bug has been fixed by ignoring all quota
101 processing for deliveries into excluded directories.
103 PH/10 Added the maildirfolder_create_regex option to appendfile.
109 PH/01 The code for finding all the local interface addresses on a FreeBSD
110 system running IPv6 was broken. This may well have applied to all BSD
111 systems, as well as to others that have similar system calls. The broken
112 code found IPv4 interfaces correctly, but gave incorrect values for the
113 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
114 that it would not match correctly against @[] and not recognize the IPv6
117 PH/02 The ipliteral router was not recognizing addresses of the form user@
118 [ipv6:....] because it didn't know about the "ipv6:" prefix.
120 PH/03 Added disable_ipv6.
122 PH/04 Changed $reply_address to use the raw form of the headers instead of the
123 decoded form, because it is most often used to construct To: headers
124 lines in autoreplies, and the decoded form may well be syntactically
125 invalid. However, $reply_address has leading white space removed, and all
126 newlines turned into spaces so that the autoreply transport does not
129 PH/05 If group was specified without a user on a router, and no group or user
130 was specified on a transport, the group from the router was ignored.
132 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
133 for visible compile-time settings that can be used to change these
134 numbers, for those that want even more. Backwards compatibility with old
135 spool files has been maintained. However, going back to a previous Exim
136 release will lost any variables that are in spool files.
138 PH/07 Two small changes when running in the test harness: increase delay when
139 passing a TCP/IP connection to a new process, in case the original
140 process has to generate a bounce, and remove special handling of
141 127.0.0.2 (sic), which is no longer necessary.
143 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
144 be the same on different OS.
146 PH/09 Moved a debug statement in filter processing to avoid a race problem when
149 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
150 whether --show-vars was specified or not
152 JJ/02 exipick: Added support for new ACL variable spool format introduced
155 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
156 syntactically invalid From: or Reply-to: line, and a filter used this to
157 generate an autoreply, and therefore failed to obtain an address for the
158 autoreply, Exim could try to deliver to a non-existent relative file
159 name, causing unrelated and misleading errors. What now happens is that
160 it logs this as a hard delivery error, but does not attempt to create a
163 PH/11 The exinext utility has a -C option for testing purposes, but although
164 the given file was scanned by exinext itself; it wasn't being passed on
165 when Exim was called.
167 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
168 an end-of-file indication when reading a command response.
170 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
171 compiled. In many other places in Exim, IPv6 addresses are always
172 recognized, so I have changed this. It also means that IPv4 domain
173 literals of the form [IPV4:n.n.n.n] are now always recognized.
175 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
176 used if the router is not running as root, for example, when verifying at
177 ACL time, or when using -bh. The debugging output from this situation was
178 non-existent - all you got was a failure to exec. I have made two
181 (a) Failures to set uid/gid, the current directory, or a process leader
182 in a subprocess such as that created by queryprogram now generate
183 suitable debugging ouput when -d is set.
185 (b) The queryprogram router detects when it is not running as root,
186 outputs suitable debugging information if -d is set, and then runs
187 the subprocess without attempting to change uid/gid.
189 PH/15 Minor change to Makefile for building test_host (undocumented testing
192 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
193 additional section of a DNS packet that returns MX or SRV records.
194 Instead, it always explicitly searches for A/AAAA records. This avoids
195 major problems that occur when a DNS server includes only records of one
196 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
197 fixed another bug: if SRV records were looked up and the corresponding
198 address records were *not* found in the additional section, the port
199 values from the SRV records were lost.
201 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
202 using the correct key (the original address) when searching the retry
203 rules in order to find which one to use for generating the retry hint.
205 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
206 adding the default one. Similarly, if it contains a Reply-To: header, the
207 errors_reply_to option, if set, is not used.
209 PH/19 When calculating a retry time, Exim used to measure the "time since
210 failure" by looking at the "first failed" field in the retry record. Now
211 it does not use this if it is later than than the arrival time of the
212 message. Instead it uses the arrival time. This makes for better
213 behaviour in cases where some deliveries succeed, thus re-setting the
214 "first failed" field. An example is a quota failure for a huge message
215 when small messages continue to be delivered. Without this change, the
216 "time since failure" will always be short, possible causing more frequent
217 delivery attempts for the huge message than are intended.
218 [Note: This change was subsequently modified - see PH/04 for 4.62.]
220 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
221 $1, $2, $3) because the numerical variables can be reset during some
222 expansion items (e.g. "match"), thereby losing the authentication data.
224 PH/21 Make -bV show the size of off_t variables so that the test suite can
225 decide whether to run tests for quotas > 2G.
227 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
228 mailbox_size, and mailbox_filecount in the appendfile transport. If a
229 filecount value is greater than 2G or if a quota value is greater than 2G
230 on a system where the size of off_t is not greater than 4, a panic error
233 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
234 never match. The debug and -bh output now contains an explicit error
235 message indicating a malformed IPv4 address or mask.
237 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
238 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
241 PH/25 Do not write to syslog when running in the test harness. The only
242 occasion when this arises is a failure to open the main or panic logs
243 (for which there is an explicit test).
245 PH/26 Added the /no_tell option to "control=freeze".
247 PH/27 If a host name lookup failed very early in a connection, for example, if
248 the IP address matched host_lookup and the reverse lookup yielded a name
249 that did not have a forward lookup, an error message of the form "no IP
250 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
251 could be logged. Now it outputs the IP address instead of "NULL".
253 PH/28 An enabling patch from MH: add new function child_open_exim2() which
254 allows the sender and the authenticated sender to be set when
255 submitting a message from within Exim. Since child_open_exim() is
256 documented for local_scan(), the new function should be too.
258 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
259 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
260 results in an empty string is now treated as unset.
262 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
264 PH/31 Added sender_verify_fail logging option.
266 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
267 needed by RFC 822 but not by RFC 2822 was commented out. I have now
268 tidied the source and removed it altogether.
270 PH/33 When a queue run was abandoned because the load average was too high, a
271 log line was always written; now it is written only if the queue_run log
272 selector is set. In addition, the log line for abandonment now contains
273 information about the queue run such as the pid. This is always present
274 in "start" and "stop" lines but was omitted from the "abandon" line.
276 PH/34 Omit spaces between a header name and the colon in the error message that
277 is given when verify = headers_syntax fails (if there are lots of them,
278 the message gets confusing).
280 PH/35 Change the default for dns_check_names_pattern to allow slashes within
281 names, as there are now some PTR records that contain slashes. This check
282 is only to protect against broken name servers that fall over on strange
283 characters, so the fact that it applies to all lookups doesn't matter.
285 PH/36 Now that the new test suite is complete, we can remove some of the
286 special code in Exim that was needed for the old test suite. For example,
287 sorting DNS records because real resolvers return them in an arbitrary
288 order. The new test suite's fake resolver always returns records in the
291 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
292 bounces) except when queue_only is set, to avoid logging races between
293 the different processes.
295 PH/38 Panic-die if .include specifies a non-absolute path.
297 PH/39 A tweak to the "H" retry rule from its user.
299 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
300 a label. They prevented compilation on older perls.
302 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
303 a warning to be raised on newish perls.
305 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
306 on queue. Changes to match documented behaviour of showing count of
307 messages matching specified criteria.
309 PH/40 Changed the default ident timeout from 30s to 5s.
311 PH/41 Added support for the use of login_cap features, on those BSD systems
312 that have them, for controlling the resources used by pipe deliveries.
314 PH/42 The content-scanning code uses fopen() to create files in which to put
315 message data. Previously it was not paying any attention to the mode of
316 the files. Exim runs with umask(0) because the rest of the code creates
317 files with open(), and sets the required mode explicitly. Thus, these
318 files were ending up world-writeable. This was not a big issue, because,
319 being within the spool directory, they were not world-accessible. I have
320 created a function called modefopen, which takes an additional mode
321 argument. It sets umask(777), creates the file, chmods it to the required
322 mode, then resets the umask. All the relevant calls to fopen() in the
323 content scanning code have been changed to use this function.
325 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
326 to 24 hours. This avoids potential overflow problems when processing G
327 and H retry rules. I suspect nobody ever tinkers with this value.
329 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
331 PH/45 When the plaintext authenticator is running as a client, the server's
332 challenges are checked to ensure they are valid base64 strings. By
333 default, the authentication attempt is cancelled if an invalid string is
334 received. Setting client_ignore_invalid_base64 true ignores these errors.
335 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
336 they are received. Thus, the responses can be made to depend on the
337 challenges. If an invalid string is ignored, an empty string is placed in
340 PH/46 Messages that are created by the autoreply transport now contains a
341 References: header, in accordance with RFCs 2822 and 3834.
343 PH/47 Added authenticated_sender_force to the smtp transport.
345 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
347 PH/49 Installed latest patch from the Sieve maintainer.
349 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
350 was also set, the appendfile transport was unnecessarily scanning a
351 directory of message files (e.g. for maildir delivery) to find the count
352 of files (along with the size), even though it did not need this
353 information. It now does the scan only if it needs to find either the
354 size of the count of files.
356 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
358 PH/52 Two bugs concerned with error handling when the smtp transport is
361 (i) Exim was not creating retry information for temporary errors given
362 for individual recipients after the DATA command when the smtp transport
363 was used in LMTP mode. This meant that they could be retried too
364 frequently, and not timed out correctly.
366 (ii) Exim was setting the flag that allows error details to be returned
367 for LMTP errors on RCPT commands, but not for LMTP errors for individual
368 recipients that were returned after the DATA command.
370 PH/53 This is related to PH/52, but is more general: for any failing address,
371 when detailed error information was permitted to be returned to the
372 sender, but the error was temporary, then after the final timeout, only
373 "retry timeout exceeded" was returned. Now it returns the full error as
374 well as "retry timeout exceeded".
376 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
377 do this, and (what is worse) MTAs that accept it.
379 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
380 will now be deprecated.
382 PH/56 New os.c-cygwin from the Cygwin maintainer.
384 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
385 formats (previously only available in exim formats via -bpr, -bpru,
386 and -bpra. Now also available in native and exiqgrep formats)
388 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
389 with very large, slow to parse queues
391 JJ/08 exipick: added ! as generic prefix to negate any criteria format
393 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
395 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
396 responses to authentication challenges, though it was showing the
397 challenges; (ii) I've removed the CR characters from the debug output for
400 PH/58 Allow for the insertion of a newline as well as a space when a string
401 is turned into more than one encoded-word during RFC 2047 encoding. The
402 Sieve code now uses this.
404 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
405 data_4xx, lost_connection, tls_required.
407 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
408 message was being sent as an SMTP response.
410 PH/61 Add -l and -k options to exicyclog.
412 PH/62 When verifying, if an address was redirected to one new address, so that
413 verification continued, and the new address failed or deferred after
414 having set something in $address_data, the value of $address_data was not
415 passed back to the ACL. This was different to the case when no
416 redirection occurred. The value is now passed back in both cases.
418 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
419 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
420 use login_cap.h, so on its own it isn't the distinguishing feature. The
421 new name refers directly to the setclassresources() function.
423 PH/65 Added configuration files for NetBSD3.
425 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
427 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
428 is preferred over IPv4.
430 PH/68 The bounce_return_message and bounce_return_body options were not being
431 honoured for bounces generated during the reception of non-SMTP messages.
432 In particular, this applied to messages rejected by the ACL. This bug has
433 been fixed. However, if bounce_return_message is true and bounce_return_
434 body is false, the headers that are returned for a non-SMTP message
435 include only those that have been read before the error was detected.
436 (In the case of an ACL rejection, they have all been read.)
438 PH/69 The HTML version of the specification is now built in a directory called
439 spec_html instead of spec.html, because the latter looks like a path with
440 a MIME-type, and this confuses some software.
442 PH/70 Catch two compiler warnings in sieve.c.
444 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
445 function verify_get_ident() calls ip_connect() to connect a socket, but
446 if the "connect()" function timed out, ip_connect() used to close the
447 socket. However, verify_get_ident() also closes the socket later, and in
448 between Exim writes to the log, which may get opened at this point. When
449 the socket was closed in ip_connect(), the log could get the same file
450 descriptor number as the socket. This naturally causes chaos. The fix is
451 not to close the socket in ip_connect(); the socket should be closed by
452 the function that creates it. There was only one place in the code where
453 this was missing, in the iplookup router, which I don't think anybody now
454 uses, but I've fixed it anyway.
456 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
457 well as to direct DNS lookups. Otherwise the handling of names in host
458 lists is inconsistent and therefore confusing.
464 PH/01 Two changes to the default runtime configuration:
466 (1) Move the checks for relay_from_hosts and authenticated clients from
467 after to before the (commented out) DNS black list checks.
469 (2) Add control=submission to the relay_from_hosts and authenticated
470 clients checks, on the grounds that messages accepted by these
471 statements are most likely to be submissions.
473 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
475 (1) Generate an error if the third argument for the ${prvs expansion is
478 (2) Treat a missing third argument of ${prvscheck as if it were an empty
481 (3) Reset the variables that are obtained from the first argument of
482 ${prvscheck and used in the second argument before leaving the code,
483 because their memory is reclaimed, so using them afterwards may do
486 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
487 one (it's much easier than Tom thought :-).
489 (5) Because of (4), we can now allow for the use of $prvscheck_result
490 inside the third argument.
492 PH/03 For some reason, the default setting of PATH when running a command from
493 a pipe transport was just "/usr/bin". I have changed it to
496 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
497 anything to be listed in the output from -bV.
499 PH/05 When a filter generated an autoreply, the entire To: header line was
500 quoted in the delivery log line, like this:
502 => >A.N.Other <ano@some.domain> <original@ddress> ...
504 This has been changed so that it extracts the operative address. There
505 may be more than one such address. If so, they are comma-separated, like
508 => >ano@some.domain,ona@other.domain <original@ddress> ...
510 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
511 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
512 not being looked up in the rDNS to get a host name, Exim was showing the
513 IP address twice in Received: lines, even though the IP addresses were
514 identical. For example:
516 Received: from [1.2.3.4] (helo=[1.2.3.4])
518 However, if the real host name was known, it was omitting the HELO data
519 if it matched the actual IP address. This has been tidied up so that it
520 doesn't show the same IP address twice.
522 PH/07 When both +timestamp and +memory debugging was on, the value given by
523 $tod_xxx expansions could be wrong, because the tod_stamp() function was
524 called by the debug printing, thereby overwriting the timestamp buffer.
525 Debugging no longer uses the tod_stamp() function when +timestamp is set.
527 PH/08 When the original message was included in an autoreply transport, it
528 always said "this is a copy of the message, including all the headers",
529 even if body_only or headers_only was set. It now gives an appropriate
532 PH/09 Applied a patch from the Sieve maintainer which:
534 o fixes some comments
535 o adds the (disabled) notify extension core
536 o adds some debug output for the result of if/elsif tests
537 o points to the current vacation draft in the documentation
538 and documents the missing references header update
542 o fixes a bug in processing the envelope test (when testing
543 multiple envelope elements, the last element determinted the
546 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
547 Electronic Mail") by including:
549 Auto-submitted: auto-generated
551 in the messages that it generates (bounce messages and others, such as
552 warnings). In the case of bounce messages for non-SMTP mesages, there was
553 also a typo: it was using "Auto_submitted" (underscore instead of
554 hyphen). Since every message generated by Exim is necessarily in response
555 to another message, thes have all been changed to:
557 Auto-Submitted: auto-replied
559 in accordance with these statements in the RFC:
561 The auto-replied keyword:
563 - SHOULD be used on messages sent in direct response to another
564 message by an automatic process,
566 - MUST NOT be used on manually-generated messages,
568 - MAY be used on Delivery Status Notifications (DSNs) and Message
569 Disposition Notifications (MDNs),
571 - MUST NOT be used on messages generated by automatic or periodic
572 processes, except for messages which are automatic responses to
575 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
576 to the default Received: header definition.
578 PH/12 Added log selector acl_warn_skipped (default on).
580 PH/13 After a successful wildlsearch lookup, discard the values of numeric
581 variables because (a) they are in the wrong storage pool and (b) even if
582 they were copied, it wouldn't work properly because of the caching.
584 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
585 checking when decoding. Apparently there are clients that generate
586 overlong encoded strings. Why am I not surprised?
588 PH/15 If the first argument of "${if match_address" was not empty, but did not
589 contain an "@" character, Exim crashed. Now it writes a panic log message
590 and treats the condition as false.
592 PH/16 In autoreply, treat an empty string for "once" the same as unset.
594 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
595 extension "envelope-auth". The code is finished and in agreement with
596 other implementations, but there is no documentation so far and in fact,
597 nobody wrote the draft yet. This extension is currently #undef'ed, thus
598 not changing the active code.
600 Print executed "if" and "elsif" statements when debugging is used. This
601 helps a great deal to understand what a filter does.
603 Document more things not specified clearly in RFC3028. I had all this
604 sorted out, when out of a sudden new issues came to my mind. Oops."
606 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
609 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
610 canonical form (as documented). However, after a host name lookup from
611 the IP address, check_host() was doing a simple string comparison with
612 addresses acquired from the DNS when checking that the found name did
613 have the original IP as one of its addresses. Since any found IPv6
614 addresses are likely to be in abbreviated form, the comparison could
615 fail. Luckily, there already exists a function for doing the comparison
616 by converting both addresses to binary, so now that is used instead of
619 PH/20 There was another similar case to PH/19, when a complete host name was
620 given in a host list; looking up its IP address could give an abbreviated
621 form, whereas the current host's name might or might not be abbreviated.
622 The same fix has been applied.
628 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
629 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
632 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
633 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
635 PH/03 Typo: missing ".o" in src/pcre/Makefile.
637 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
638 header line, restrict the check to what is listed in RFCs 2369 and 2929.
639 Also, for "Auto-Submitted", treat anything other than "no" as
640 non-personal, in accordance with RFC 3834. (Previously it treated
641 anything starting "auto-" as non-personal.)
643 TF/01 The control=submission/name=... option had a problem with syntax
644 errors if the name included a slash character. The /name= option
645 now slurps the rest of the string, so it can include any characters
646 but it must come last in the list of options (after /sender_retain
649 PH/05 Some modifications to the interface to the fake nameserver for the new
657 TK/01 Added the "success_on_redirect" address verification option. See
658 NewStuff for rationale and an example.
660 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
662 PH/02 Patch to exigrep to allow it to work on syslog lines.
664 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
665 fread() to skip over the body file's header line, because in Cygwin the
666 header line is locked and is inaccessible.
668 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
669 co-exist for some time) to make it clear that it is the Exim ID that is
670 referenced, not the Message-ID: header line.
672 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
673 string_format() function, because snprintf() does not exist on all
676 PH/06 The use of forbid_filter_existstest now also locks out the use of the
677 ${stat: expansion item.
679 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
680 protocol synchronization error", to keep the pedants happy.
682 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
683 well as for IRIX systems, when gcc is being used. See the host.c source
686 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
688 PH/10 Named domain lists were not working if used in a queue_smtp_domains
691 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
692 transport and to the smtp transport in LMTP mode.
694 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
696 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
697 run a filter in a subprocess. This could lead to confusion in subsequent
698 lookups in the parent process. There should also be a search_tidyup() at
699 the end of the subprocess.
701 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
702 only if the host matched helo_try_verify_hosts, which caused the
703 verification to occur when the EHLO/HELO command was issued. The ACL just
704 tested the remembered result. Now, if a previous verification attempt has
705 not happened, "verify = helo" does it there and then.
707 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
709 TK/03 Fix log output including CR from clamd.
711 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
712 exist provoked a memory error which could cause a segfault.
714 PH/15 Installed PCRE 6.2
716 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
718 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
719 of the problem. Specifically, suggested +O2 rather than +O1 for the
722 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
724 PH/20 If a delivery was routed to a non-standard port by means of an SRV
725 record, the port was not correctly logged when the outgoing_port log
726 selector was set (it logged the transort's default port).
728 PH/21 Added support for host-specific ports to manualroute, queryprogram,
729 fallback_hosts, and "hosts" in the smtp transport.
731 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
732 host errors such as "Connection refused".
734 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
735 authentication with radiusclient 0.4.9:
737 - Error returned from rc_read_config was caught wrongly
738 - Username/password not passed on to radius server due to wrong length.
740 The presumption is that some radiusclient API changes for 4.51/PH/17
741 were not taken care of correctly. The code is still untested by me (my
742 Linux distribution still has 0.3.2 of radiusclient), but it was
743 contributed by a Radius user.
745 PH/24 When doing a callout, the value of $domain wasn't set correctly when
746 expanding the "port" option of the smtp transport.
748 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
749 while reading a MIME header. Thanks to Tom Hughes for a patch.
751 PH/24 Include config.h inside local_scan.h so that configuration settings are
754 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
755 that in an ACL for RCPT (for example), you can examine exactly what was
758 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
759 commands, but it was not correctly comparing the address with the actual
760 client host address. Thus, it would show the EHLO address in Received:
761 header lines when this was not necessary.
763 PH/27 Added the % operator to ${eval:}.
765 PH/28 Exim tries to create and chdir to its spool directory when it starts;
766 it should be ignoring failures (because with -C, for example, it has lost
767 privilege). It wasn't ignoring creation failures other than "already
770 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
773 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
774 because an input line was too long, either on its own, or by virtue of
775 too many continuations, the temporary file was not being removed, and the
776 return code was incorrect.
778 PH/31 Missing "BOOL" in function definition in filtertest.c.
780 PH/32 Applied Sieve patches from the maintainer.
782 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
784 PH/33 Added "verify = not_blind".
786 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
787 Local/Makefile (with some defaults set). These are used in built scripts
788 such as exicyclog, but they have never been used in the exim_install
789 script (though there are many overriding facilities there). I have
790 arranged that the exim_install script now takes note of these two
793 PH/35 Installed configuration files for Dragonfly.
795 PH/36 When a locally submitted message by a trusted user did not contain a
796 From: header, and the sender address was obtained from -f or from an SMTP
797 MAIL command, and the trusted user did not use -F to supply a sender
798 name, $originator_name was incorrectly used when constructing a From:
799 header. Furthermore, $originator_name was used for submission mode
800 messages from external hosts without From: headers in a similar way,
801 which is clearly wrong.
803 PH/37 Added control=suppress_local_fixups.
805 PH/38 When log_selector = +received_sender was set, and the addition of the
806 sender made the log line's construction buffer exactly full, or one byte
807 less than full, an overflow happened when the terminating "\n" was
810 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
811 when the result of a list match is failure because a DNS lookup failed.
813 PH/40 RM_COMMAND is now used in the building process.
815 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
816 the "build-* directories that it finds.
818 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
819 address in a domain literal was a prefix of an interface address.
821 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
822 when verifying a sender address, unless rewrite_headers is false.
824 PH/44 Wrote a long comment about why errors_to addresses are verified as
825 recipients, not senders.
827 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
828 the ratelimit ACL was added.
830 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
832 PH/46 Added extra information about PostgreSQL errors to the error string.
834 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
835 avoiding the need to install special zones in a real server. This is
836 backwards compatible; if it can't find the fake resolver, it drops back.
837 Thus, both old and new test suites can be run.
839 TF/02 Added util/ratelimit.pl
841 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
842 clock is set back in time.
844 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
845 Candler <B.Candler@pobox.com>.
847 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
848 OK for addresses that are the result of redirections.
850 PH/48 A number of further additions for the benefit of the new test suite,
851 including a fake gethostbyname() that interfaces to the fake DNS resolver
854 TF/06 The fix for widen_domains has also been applied to qualify_single and
855 search_parents which are the other dnslookup options that can cause
858 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
861 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
863 TF/07 Exim produced the error message "an SRV record indicated no SMTP
864 service" if it encountered an MX record with an empty target hostname.
865 The message is now "an MX or SRV record indicated no SMTP service".
867 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
868 if the DNS of the sending site is misconfigured. This is quite a
869 common situation. This change restores the behaviour of treating a
870 helo verification defer as a failure.
872 PH/51 If self=fail was set on a router, the bounce message did not include the
873 actual error message.
879 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
881 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
882 command itself ended in error, the underlying message about the transport
883 filter timeout was being overwritten with the pipe command error. Now the
884 underlying error message should be appended to the second error message.
886 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
888 PH/02 Reduce the amount of output that "make" produces by default. Full output
889 can still be requested.
891 PH/03 The warning log line about a condition test deferring for a "warn" verb
892 was being output only once per connection, rather than after each
893 occurrence (because it was using the same function as for successful
894 "warn" verbs). This seems wrong, so I have changed it.
896 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
897 it should not have, which might have caused a crash in the right
898 circumstances, but probably never did.
900 PH/04 Installed a modified version of Tony Finch's patch to make submission
901 mode fix the return path as well as the Sender: header line, and to
902 add a /name= option so that you can make the user's friendly name appear
905 TF/03 Added the control = fakedefer ACL modifier.
907 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
908 Mark Lowes for thorough testing.
910 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
912 TK/03 Merged latest SRS patch from Miles Wilton.
914 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
915 with the definition in sysexits.h (which is #included earlier).
916 Fortunately, Exim does not actually use EX_OK. The code used to try to
917 preserve the sysexits.h value, by assumimg that macro definitions were
918 scanned for macro replacements. I have been disabused of this notion,
919 so now the code just undefines EX_OK before #including unistd.h.
921 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
922 in the smtp transport. When a block could not be written in a single
923 write() function, the timeout was being re-applied to each part-write.
924 This seems wrong - if the receiver was accepting one byte at a time it
925 would take for ever. The timeout is now adjusted when this happens. It
926 doesn't have to be particularly precise.
928 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
929 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
931 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
932 without a domain if the check to <postmaster@domain> fails.
934 SC/01 Eximstats: added -xls and the ability to specify output files
935 (patch written by Frank Heydlauf).
937 SC/02 Eximstats: use FileHandles for outputing results.
939 SC/03 Eximstats: allow any combination of xls, txt, and html output.
941 SC/04 Eximstats: fixed display of large numbers with -nvr option
943 SC/05 Eximstats: fixed merging of reports with empty tables.
945 SC/06 Eximstats: added the -include_original_destination flag
947 SC/07 Eximstats: removed tabs and trailing whitespace.
949 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
951 TK/06 MBOX spool code: Add real "From " MBOX separator line
952 so the .eml file is really in mbox format (even though
953 most programs do not really care). Patch from Alex Miller.
955 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
956 The latter is generated from $received_to and is only set if the
957 message has one envelope recipient. SA can use these headers,
958 obviously out-of-the-box. Patch from Alex Miller.
960 PH/08 The ${def test on a variable was returning false if the variable's
961 value was "0", contrary to what the specification has always said!
962 The result should be true unless the variable is empty.
964 PH/09 The syntax error of a character other than { following "${if
965 def:variable_name" (after optional whitespace) was not being diagnosed.
966 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
967 accidental colon was present, for example, could give incorrect results.
969 PH/10 Tidied the code in a number of places where the st_size field of a stat()
970 result is used (not including appendfile, where other changes are about
973 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
974 This involved changing a lot of size variables from int to off_t. It
975 should work with maildirs and everything.
977 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
978 spamd dying while we are connected to it.
980 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
983 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
984 function for BDB 4.3.
986 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
988 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
989 the sources for PCRE have been re-arranged and more files are now
992 PH/15 The code I had for printing potentially long long variables in PH/11
993 above was not the best (it lost precision). The length of off_t variables
994 is now inspected at build time, and an appropriate printing format (%ld
995 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
996 to be "long long int" or "long int". This is needed for the internal
997 formatting function string_vformat().
999 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1000 the configuration file to be ":syslog", then the script "guesses" where
1001 the logs files are, rather than using the compiled in default. In our
1002 case the guess is not the same as the compiled default, so the script
1003 suddenly stopped working when I started to use syslog. The patch checks
1004 to see if log_file_path is "". If so, it attempts to read it from exim
1005 with no configuration file to get the compiled in version, before it
1006 falls back to the previous guessing code."
1008 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1009 implementing BATV in an Exim configuration. See NewStuff for the gory
1012 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1013 Makefile that are specific to HP-UX.
1015 PH/18 If the "use_postmaster" option was set for a recipient callout together
1016 with the "random" option, the postmaster address was used as the MAIL
1017 FROM address for the random test, but not for the subsequent recipient
1018 test. It is now used for both.
1020 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1021 patch removes a few documentation additions to RFC 3028, because the
1022 latest draft now contains them. It adds the new en;ascii-case comparator
1023 and a new error check for 8bit text in MIME parts. Comparator and
1024 require names are now matched exactly. I enabled the subaddress
1025 extension, but it is not well tested yet (read: it works for me)."
1027 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1028 rework some of the code of TK/09 above to avoid the hardwired use of
1029 "%lld" and "long long". Replaced the call to snprintf() with a call to
1032 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1033 records point to non-existent hosts", "retry timeout exceeded", and
1034 "retry time not reached for any host after a long failure period".
1036 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1037 experimental DomainKeys support:
1039 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1040 (2) On an error such as an illegally used "control", the wrong name for
1041 the control was given.
1043 These problems did NOT occur unless DomainKeys support was compiled.
1045 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1047 PH/24 Added ${if match_ip condition.
1049 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1050 databases so that it will be absolutely obvious if a crash occurs in the
1051 DB library. This is a regular occurrence (often caused by mis-matched
1054 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1055 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1056 picked up on a user's system that detects such things. There doesn't seem
1057 to be a gcc warning option for this - only an attribute that has to be
1058 put on the function's prototype. It seems that in Fedora Core 4 they have
1059 set this on a number of new functions. No doubt there will be more in due
1062 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1063 specify a transport. However, if an address that was verified by such a
1064 router was the subject of a callout, Exim crashed because it tried to
1065 read the rcpt_include_affixes from the non-existent transport. Now it
1066 just assumes that the setting of that option is false. This bug was
1067 introduced by 4.51/PH/31.
1069 PH/28 Changed -d+all to exclude +memory, because that information is very
1070 rarely of interest, but it makes the output a lot bigger. People tend to
1071 do -d+all out of habit.
1073 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1074 code in os-type was giving problems when libc.so lives in lib64, like on
1077 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1078 aren't the modern standard, and it seems that some systems' include files
1079 don't always have them. Exim was already checking for some of the newer
1080 ones like T_AAAA, and defining it itself. I've added checks for all the
1081 record types that Exim uses.
1083 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1084 not automatically generating a new one, as it is supposed to. This
1085 prevented TLS from working. If the file did exist, but contained invalid
1086 data, a new version was generated, as expected. It was only the case of a
1087 non-existent file that was broken.
1089 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1090 with a change in libdomainkeys > 0.64.
1092 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1093 from DNS. If the selector record carries the flag, it now has
1094 precedence over the domain-wide flag.
1096 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1098 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1099 the use of a port name that isn't defined in /etc/services) occurred, the
1100 message was deferred as in a normal delivery, and thus remained on the
1101 spool, instead of being failed because of the mua_wrapper setting. This
1102 is now fixed, and I tidied up some of the mua_wrapper messages at the
1105 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1106 the messages in a hash of arrays rather than using individual hashes.
1107 This is a bit cleaner and results in dramatic memory savings, albeit
1108 at a slight CPU cost.
1110 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1111 as requested by Marc Sherman.
1113 SC/10 Eximstats: added histograms for user specified patterns as requested
1116 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1118 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1119 fopen() in the content-scanning modules that did not already have it.
1125 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1126 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1128 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1130 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1132 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1133 to test Sieve filters that use "vacation".
1135 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1136 that changes the way the GnuTLS parameters are stored in the cache file.
1137 The new format can be generated externally. For backward compatibility,
1138 if the data in the cache doesn't make sense, Exim assumes it has read an
1139 old-format file, and it generates new data and writes a new file. This
1140 means that you can't go back to an older release without removing the
1143 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1144 work if there are any delivery delays because "one_time" forces the
1145 parent to be marked "delivered", so its unseen clone is never tried
1146 again. For this reason, Exim now forbids the simultaneous setting of
1149 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1150 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1151 entry if you want to know the details. The fix, however, neglected to
1152 consider the case when local delivery batching is involved. The test for
1153 "previously delivered" was not happening when checking to see if an
1154 address could be batched with a previous (undelivered) one; under
1155 certain circumstances this could lead to multiple deliveries to the same
1158 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1159 in its include files, and this causes problems building Exim.
1161 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1162 header_syntax) but Exim was just ignoring anything given after a slash.
1163 In particular, this caused confusion with an attempt to use "verify =
1164 reverse_host_lookup/defer_ok". An error is now given when options are
1165 supplied for verify items that do not have them. (Maybe reverse_host_
1166 lookup should have a defer_ok option, but that's a different point.)
1168 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1169 defined by RFC 821) to 2048, because there were problems with some AUTH
1170 commands, and RFC 1869 says the size should be increased for extended
1171 SMTP commands that take arguments.
1173 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1176 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1177 "unknown" error; now it says that the functionality isn't in the binary.
1179 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1180 an address' error message when a string expansion fails (syntax or
1181 whatever). Otherwise the password may appear in the log. Following change
1182 PH/42 below, there is no longer a chance of it appearing in a bounce
1185 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1187 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1188 of its addresses was ever tried. (Bugzilla bug #2.)
1190 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1191 the result incorrectly in the debug output. (It correctly added a newline
1192 to what was transported.)
1194 TF/01 Added $received_time.
1196 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1197 commented out examples of how to interface to a virus scanner and to
1198 SpamAssassin. Also added commented examples of av_scanner and
1199 spamd_address settings.
1201 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1202 and controls are allowed in which ACLs. There were a couple of minor
1203 errors. Some of the entries in the conditions table (which is a table of
1204 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1205 negation of where the condition IS allowed.
1207 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1209 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1210 header file does not have a version number, so I've had to invent a new
1211 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1212 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1213 radiusclient), but it was contributed by a Radius user.
1215 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1216 files or directories, for OpenSSL.
1218 PH/19 When an Exim process that is running as root has to create an Exim log
1219 file, it does so in a subprocess that runs as exim:exim so as to get the
1220 ownership right at creation (otherwise, other Exim processes might see
1221 the file with the wrong ownership). There was no test for failure of this
1222 fork() call, which would lead to the process getting stuck as it waited
1223 for a non-existent subprocess. Forks do occasionally fail when resources
1224 run out. I reviewed all the other calls to fork(); they all seem to check
1227 PH/20 When checking for unexpected SMTP input at connect time (before writing
1228 the banner), Exim was not dealing correctly with a non-positive return
1229 from the read() function. If the client had disconnected by this time,
1230 the result was a log entry for a synchronization error with an empty
1231 string after "input=" when read() returned zero. If read() returned -1
1232 (an event I could not check), uninitialized data bytes were printed.
1233 There were reports of junk text (parts of files, etc) appearing after
1236 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1238 PH/22 Added support for macro redefinition, and (re)definition in between
1239 driver and ACL definitions.
1241 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1242 forgetting to use the resulting value; it was using the unexpanded value.
1244 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1245 hadn't been configured. The fix is from Juergen Kreileder, who
1246 understands it better than I do:
1248 "Here's what I see happening with three configured cyrus_sasl
1249 authenticators configured (plain, login, cram-md5):
1251 On startup auth_cyrus_sasl_init() gets called for each of these.
1252 This means three calls to sasl_listmech() without a specified mech_list.
1253 => SASL tests which mechs of all available mechs actually work
1254 => three warnings about OTP not working
1255 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1257 With the patch, sasl_listmech() also gets called three times. But now
1258 SASL's mech_list option is set to the server_mech specified in the the
1259 authenticator. Or in other words, the answer from sasl_listmech()
1260 gets limited to just the mech you're testing for (which is different
1262 => the return list contains just 'plain' or 'login', 'cram-md5' or
1263 nothing depending on the value of ob->server_mech.
1265 I've just tested the patch: Authentication still works fine,
1266 unavailable mechs specified in the exim configuration are still
1267 caught, and the auth.log warnings about OTP are gone."
1269 PH/25 When debugging is enabled, the contents of the command line are added
1270 to the debugging output, even when log_selector=+arguments is not
1273 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1274 answer is "GNU", and only if the return is "GNU/something" is the answer
1277 PH/27 $acl_verify_message is now set immediately after the failure of a
1278 verification in an ACL, and so is available in subsequent modifiers. In
1279 particular, the message can be preserved by coding like this:
1281 warn !verify = sender
1282 set acl_m0 = $acl_verify_message
1284 Previously, $acl_verify_message was set only while expanding "message"
1285 and "log_message" when a very denied access.
1287 PH/28 Modified OS/os.c-Linux with
1289 -#ifndef OS_LOAD_AVERAGE
1290 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1292 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1293 nomenclature these days.)
1295 PH/29 Installed patch from the Sieve maintainer that adds the options
1296 sieve_useraddress and sieve_subaddress to the redirect router.
1298 PH/30 In these circumstances:
1299 . Two addresses routed to the same list of hosts;
1300 . First host does not offer TLS;
1301 . First host accepts first address;
1302 . First host gives temporary error to second address;
1303 . Second host offers TLS and a TLS session is established;
1304 . Second host accepts second address.
1305 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1306 and peerdn, if requested) that were in fact used only for the second
1309 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1310 attention to any local part prefix or suffix that was matched by the
1311 router that accepted the address. It now behaves in the same way as it
1312 does for delivery: the affixes are removed from the local part unless
1313 rcpt_include_affixes is set on the transport.
1315 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1316 timeout during the DATA phase of an incoming message.
1318 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1319 applied a patch sanctioned by the Sieve maintainer.
1321 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1322 the uid or gid is negative. A case of a negative gid caused this to be
1323 noticed. The fix allows for either to be negative.
1325 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1326 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1329 PH/36 The change PH/12 above was broken. Fixed it.
1331 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1332 the grounds that routing the same address twice would always produce the
1333 same answer. This might have been true once, but it is certainly no
1334 longer true now. Routing a child address may depend on the previous
1335 routing that produced that child. Some complicated redirection strategies
1336 went wrong when messages had multiple recipients, and made Exim's
1337 behaviour dependent on the order in which the addresses were given.
1339 I have moved the duplicate checking until after the routing is complete.
1340 Exim scans the addresses that are assigned to local and remote
1341 transports, and removes any duplicates. This means that more work will be
1342 done, as duplicates will always all be routed, but duplicates are
1343 presumably rare, so I don't expect this is of any significance.
1345 For deliveries to pipes, files, and autoreplies, the duplicate checking
1346 still happens during the routing process, since they are not going to be
1349 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1350 It corrects a timeout issue with spamd. This is Ian's comment: "The
1351 background is that sometimes spamd either never reads data from a
1352 connection it has accepted, or it never writes response data. The exiscan
1353 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1354 blindly assumes that writes won't block so it may never time out."
1356 PH/39 Allow G after quota size as well as K and M.
1358 PH/40 The value set for $authenticated_id in an authenticator may not contain
1359 binary zeroes or newlines because the value is written to log lines and
1360 to spool files. There was no check on this. Now the value is run through
1361 the string_printing() function so that such characters are converted to
1362 printable escape sequences.
1364 PH/41 $message_linecount is a new variable that contains the total number of
1365 lines in the message. Compare $body_linecount, which is the count for the
1368 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1369 bounce and delay warning messages, except in certain special cases, which
1372 (a) An SMTP error message from a remote host;
1373 (b) A message specified in a :fail: redirection;
1374 (c) A message specified in a "fail" command in a system filter;
1375 (d) A message specified in a FAIL return from the queryprogram router;
1376 (e) A message specified by the cannot_route_message router option.
1378 In these cases only, Exim does include the error details in bounce and
1379 warning messages. There are also a few cases where bland messages such
1380 as "unrouteable address" or "local delivery error" are given.
1382 PH/43 $value is now also set for the "else" part of a ${run expansion.
1384 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1385 being worked on, but at least Exim now implements the latest version to
1388 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1389 process to complete was treated as a delivery failure, a timeout while
1390 writing the message to the pipe was logged, but erroneously treated as a
1391 successful delivery. Such timeouts include transport filter timeouts. For
1392 consistency with the overall process timeout, these timeouts are now
1393 treated as errors, giving rise to delivery failures by default. However,
1394 there is now a new Boolean option for the pipe transport called
1395 timeout_defer, which, if set TRUE, converts the failures into defers for
1396 both kinds of timeout. A transport filter timeout is now identified in
1399 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1400 systems where "make" and "gmake" are different, calling "gmake" at top
1401 level broke things. I've arranged for the value of $(MAKE) to be passed
1402 from the Makefile to this script so that it can call the same version of
1406 A note about Exim versions 4.44 and 4.50
1407 ----------------------------------------
1409 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1410 changes of various kinds. As a consequence, a big documentation update was
1411 needed. This delayed the release for rather longer than seemed good, especially
1412 in the light of a couple of (minor) security issues. Therefore, the changes
1413 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1414 release. So 4.44 and 4.50 are in effect two different branches that both start
1417 I have left the 4.50 change log unchanged; it contains all the changes since
1418 4.43. The change log for 4.44 is below; many of its items are identical to
1419 those for 4.50. This seems to be the most sensible way to preserve the
1420 historical information.
1426 1. Minor wording change to the doc/README.SIEVE file.
1428 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1429 computation of the current number of files was incorrect.
1431 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1432 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1435 4. Give more explanation in the error message when the command for a transport
1436 filter fails to execute.
1438 5. There are several places where Exim runs a non-Exim command in a
1439 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1440 was being done only for the command run by the queryprogram router. It is
1441 now done for all such subprocesses. The other cases are: ${run, transport
1442 filters, and the commands run by the lmtp and pipe transports.
1444 6. Added CONFIGURE_GROUP build-time option.
1446 7. Some older OS have a limit of 256 on the maximum number of file
1447 descriptors. Exim was using setrlimit() to set 1000 as a large value
1448 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1449 systems. I've change it so that if it can't get 1000, it tries for 256.
1451 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1452 was an oversight, and furthermore, ever since the addition of extra
1453 controls (e.g. 4.43/32), the checks on when to allow different forms of
1454 "control" were broken. There should now be diagnostics for all cases when a
1455 control that does not make sense is encountered.
1457 9. Added the /retain_sender option to "control=submission".
1459 10. $recipients is now available in the predata ACL (oversight).
1461 11. Tidy the search cache before the fork to do a delivery from a message
1462 received from the command line. Otherwise the child will trigger a lookup
1463 failure and thereby defer the delivery if it tries to use (for example) a
1464 cached ldap connection that the parent has called unbind on.
1466 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1467 of $address_data from the recipient verification was clobbered by the
1468 sender verification.
1470 13. The value of address_data from a sender verification is now available in
1471 $sender_address_data in subsequent conditions in the ACL statement.
1473 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1475 15. Added a new option "connect=<time>" to callout options, to set a different
1478 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1479 was its contents. (It was OK if the option was not defined at all.)
1481 17. A "Completed" log line is now written for messages that are removed from
1482 the spool by the -Mrm option.
1484 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1485 information about exactly what failed.
1487 19. Added -dd to debug only the daemon process.
1489 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1490 handles timeouts, both on the server side and network timeouts. Renamed the
1491 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1493 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1494 It is now set to "smtps".
1496 22. $host_address is now set to the target address during the checking of
1497 ignore_target_hosts.
1499 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1500 being passed; this would have caused $sender_host_name to have been used if
1501 matching the list had actually called for a host name (not very likely,
1502 since this list is usually IP addresses). A host name is now passed as
1505 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1506 code that specifies a non-restarting handler (typically sigaction() in
1507 modern systems) in an attempt to fix a rare and obscure crash bug.
1509 25. Narrowed the window for a race in the daemon that could cause it to ignore
1510 SIGCHLD signals. This is not a major problem, because they are used only to
1511 wake it up if nothing else does.
1513 26. A malformed maildirsize file could cause Exim to calculate negative values
1514 for the mailbox size or file count. Odd effects could occur as a result.
1515 The maildirsize information is now recalculated if the size or filecount
1518 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1519 support for a long time. Removed HAVE_SYS_VFS_H.
1521 28. Installed the latest version of exipick from John Jetmore.
1523 29. In an address list, if the pattern was not a regular expression, an empty
1524 subject address (from a bounce message) matched only if the pattern was an
1525 empty string. Non-empty patterns were not even tested. This was the wrong
1526 because it is perfectly reasonable to use an empty address as part of a
1527 database query. An empty address is now tested by patterns that are
1528 lookups. However, all the other forms of pattern expect the subject to
1529 contain a local part and a domain, and therefore, for them, an empty
1530 address still always fails if the pattern is not itself empty.
1532 30. Exim went into a mad DNS loop when attempting to do a callout where the
1533 host was specified on an smtp transport, and looking it up yielded more
1534 than one IP address.
1536 31. Re-factored the code for checking spool and log partition space into a
1537 function that finds that data and another that does the check. The former
1538 is then used to implement four new variables: $spool_space, $log_space,
1539 $spool_inodes, and $log_inodes.
1541 32. The RFC2047 encoding function was originally intended for short strings
1542 such as real names; it was not keeping to the 75-character limit for
1543 encoded words that the RFC imposes. It now respects the limit, and
1544 generates multiple encoded words if necessary. To be on the safe side, I
1545 have increased the buffer size for the ${rfc2047: expansion operator from
1548 33. It is now permitted to omit both strings after an "if" condition; if the
1549 condition is true, the result is "true". As before, when the second string
1550 is omitted, a false condition yields an empty string. This makes it less
1551 cumbersome to write custom ACL and router conditions.
1553 34. Failure to deliver a bounce message always caused it to be frozen, even if
1554 there was an errors_to setting on the router. The errors_to setting is now
1557 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1558 canonical form (fully expanded) before being placed in
1559 $sender_host_address.
1561 36. The table in the code that translates DNS record types into text (T_A to
1562 "A" for instance) was missing entries for NS and CNAME. It is just possible
1563 that this could have caused confusion if both these types were looked up
1564 for the same domain, because the text type is used as part of Exim's
1565 per-process caching. But the chance of anyone hitting this buglet seems
1568 37. The dnsdb lookup has been extended in a number of ways.
1570 (1) There is a new type, "zns", which walks up the domain tree until it
1571 finds some nameserver records. It should be used with care.
1573 (2) There is a new type, "mxh", which is like "mx" except that it returns
1574 just the host names, not the priorities.
1576 (3) It is now possible to give a list of domains (or IP addresses) to be
1577 looked up. The behaviour when one of the lookups defers can be
1578 controlled by a keyword.
1580 (4) It is now possible to specify the separator character for use when
1581 multiple records are returned.
1583 38. The dnslists ACL condition has been extended: it is now possible to supply
1584 a list of IP addresses and/or domains to be looked up in a particular DNS
1587 39. Added log_selector=+queue_time_overall.
1589 40. When running the queue in the test harness, wait just a tad after forking a
1590 delivery process, to get repeatability of debugging output.
1592 41. Include certificate and key file names in error message when GnuTLS fails
1593 to set them up, because the GnuTLS error message doesn't include the name
1594 of the failing file when there is a problem reading it.
1596 42. Allow both -bf and -bF in the same test run.
1598 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1600 44. The "Exiscan patch" is now merged into the mainline Exim source.
1602 45. Sometimes the final signoff response after QUIT could fail to get
1603 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1604 < 0 before doing a fflush(). This bug looks as though it goes back to the
1605 introduction of TLS in release 3.20, but "sometimes" must have been rare
1606 because the tests only now provoked it.
1608 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1609 (this can affect the format of dates).
1611 47. exim_tidydb, when checking for the continued existence of a message for
1612 which it has found a message-specific retry record, was not finding
1613 messages that were in split spool directories. Consequently, it was
1614 deleting retry records that should have stayed in existence.
1616 48. Steve fixed some bugs in eximstats.
1618 49. The SPA authentication driver was not abandoning authentication and moving
1619 on to the next authenticator when an expansion was forced to fail,
1620 contradicting the general specification for all authenticators. Instead it
1621 was generating a temporary error. It now behaves as specified.
1623 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1624 (the order specifies the preference for clients). The order is now AES256,
1625 AES128, 3DES, ARCFOUR128.
1627 51. Small patch to Sieve code - explicitly set From: when generating an
1630 52. Exim crashed if a remote delivery caused a very long error message to be
1631 recorded - for instance if somebody sent an entire SpamAssassin report back
1632 as a large number of 550 error lines. This bug was coincidentally fixed by
1633 increasing the size of one of Exim's internal buffers (big_buffer) that
1634 happened as part of the Exiscan merge. However, to be on the safe side, I
1635 have made the code more robust (and fixed the comments that describe what
1638 53. Now that there can be additional text after "Completed" in log lines (if
1639 the queue_time_overall log selector is set), a one-byte patch to exigrep
1640 was needed to allow it to recognize "Completed" as not the last thing in
1643 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1644 patch that reportedly fixes this has been added. I am not expert enough to
1645 create a test for it. This is what the patch creator wrote:
1647 "I found a little strange behaviour of ldap code when working with
1648 Windows 2003 AD Domain, where users was placed in more than one
1649 Organization Units. When I tried to give exim partial DN, the exit code
1650 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1651 But simultaneously result of request was absolutely normal ldap result,
1652 so I produce this patch..."
1654 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1655 REFERENCE, so I have modified the code to exclude the patch when that macro
1658 55. Some experimental protocols are using DNS PTR records for new purposes. The
1659 keys for these records are domain names, not reversed IP addresses. The
1660 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1661 leaves it alone. Component reversal etc. now happens only for IP addresses.
1664 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1666 57. Double the size of the debug message buffer (to 2048) so that more of very
1667 long debug lines gets shown.
1669 58. The exicyclog utility now does better if the number of log files to keep
1670 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1672 59. Two changes related to the smtp_active_hostname option:
1674 (1) $smtp_active_hostname is now available as a variable.
1675 (2) The default for smtp_banner uses $smtp_active_hostname instead
1676 of $primary_hostname.
1678 60. The host_aton() function is supposed to be passed a string that is known
1679 to be a valid IP address. However, in the case of IPv6 addresses, it was
1680 not checking this. This is a hostage to fortune. Exim now panics and dies
1681 if the condition is not met. A case was found where this could be provoked
1682 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1683 components; fortuitously, this particular loophole had already been fixed
1684 by change 4.50/55 above.
1686 If there are any other similar loopholes, the new check in host_aton()
1687 itself should stop them being exploited. The report I received stated that
1688 data on the command line could provoke the exploit when Exim was running as
1689 exim, but did not say which command line option was involved. All I could
1690 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1691 running as the user.
1694 61. There was a buffer overflow vulnerability in the SPA authentication code
1695 (which came originally from the Samba project). I have added a test to the
1696 spa_base64_to_bits() function which I hope fixes it.
1699 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1700 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1702 63. The daemon start-up calls getloadavg() while still root for those OS that
1703 need the first call to be done as root, but it missed one case: when
1704 deliver_queue_load_max is set with deliver_drop_privilege. This is
1705 necessary for the benefit of the queue runner, because there is no re-exec
1706 when deliver_drop_privilege is set.
1708 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1709 This has been fixed.
1711 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1712 was in use, was not putting the data itself into the right store pool;
1713 consequently, it could be overwritten for a subsequent message in the same
1714 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1717 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1719 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1720 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1721 the function were treating the return as a boolean value, which happened to
1722 work because 0=false and not-0=true, but is not correct code.
1724 68. The host_aton() function was not handling scoped IPv6 addresses (those
1725 with, for example, "%eth0" on the end) correctly.
1727 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1728 negated items (that is, ~something) in unsigned ints. Some compilers
1729 apparently mutter when there is no cast.
1731 70. If an address verification called from an ACL failed, and did not produce a
1732 user-specific message (i.e. there was only a "system" message), nothing was
1733 put in $acl_verify_message. In this situation, it now puts the system
1736 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1737 session; change 4.31/43 added the unwanted input to the log line - except
1738 that it did not do this in the start of session case. It now does.
1740 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1741 This is wrong and can cause the other end to generate a synchronization
1742 error if it is another Exim or anything else that does the synchronization
1743 check. A QUIT command is no longer sent after a timeout.
1745 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1746 during host lookups.
1748 74. The defer_ok option of callout verification was not working if it was used
1749 when verifying addresses in header lines, that is, for this case:
1751 verify = header_sender/callout=defer_ok
1753 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1754 those file descriptors could be used for SMTP connections. If anything
1755 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1756 could be sent to the SMTP client, causing chaos. The daemon now opens
1757 stdin, stdout, and stderr to /dev/null when it puts itself into the
1760 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1761 log by default. The user can override this with suitable Perl magic.
1763 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1764 the log message when discard triggers, was not working for the DATA ACL or
1765 for the non-SMTP ACL.
1767 78. Error message wording change in sieve.c.
1769 79. If smtp_accept_max_per_host was set, the number of connections could be
1770 restricted to fewer than expected, because the daemon was trying to set up
1771 a new connection before checking whether the processes handling previous
1772 connections had finished. The check for completed processes is now done
1773 earlier. On busy systems, this bug wouldn't be noticed because something
1774 else would have woken the daemon, and it would have reaped the completed
1777 80. If a message was submitted locally by a user whose login name contained one
1778 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1779 It caused a spool format error. I have fixed the spool reading code. A
1780 related problem was that the "from" clause in the Received: line became
1781 illegal because of the space(s). It is now covered by ${quote_local_part.
1783 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1786 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1788 83. Patch from Sieve maintainer to fix unterminated string problem in
1789 "vacation" handling.
1791 84. Some minor changes to the Linux configuration files to help with other
1792 OS variants using glibc.
1794 85. One more patch for Sieve to update vacation handling to latest spec.
1797 ----------------------------------------------------
1798 See the note above about the 4.44 and 4.50 releases.
1799 ----------------------------------------------------
1805 1. Change 4.43/35 introduced a bug that caused file counts to be
1806 incorrectly computed when quota_filecount was set in an appendfile
1809 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1810 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1813 3. Give more explanation in the error message when the command for a transport
1814 filter fails to execute.
1816 4. There are several places where Exim runs a non-Exim command in a
1817 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1818 was being done only for the command run by the queryprogram router. It is
1819 now done for all such subprocesses. The other cases are: ${run, transport
1820 filters, and the commands run by the lmtp and pipe transports.
1822 5. Some older OS have a limit of 256 on the maximum number of file
1823 descriptors. Exim was using setrlimit() to set 1000 as a large value
1824 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1825 systems. I've change it so that if it can't get 1000, it tries for 256.
1827 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1828 was an oversight, and furthermore, ever since the addition of extra
1829 controls (e.g. 4.43/32), the checks on when to allow different forms of
1830 "control" were broken. There should now be diagnostics for all cases when a
1831 control that does not make sense is encountered.
1833 7. $recipients is now available in the predata ACL (oversight).
1835 8. Tidy the search cache before the fork to do a delivery from a message
1836 received from the command line. Otherwise the child will trigger a lookup
1837 failure and thereby defer the delivery if it tries to use (for example) a
1838 cached ldap connection that the parent has called unbind on.
1840 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1841 of $address_data from the recipient verification was clobbered by the
1842 sender verification.
1844 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1845 was its contents. (It was OK if the option was not defined at all.)
1847 11. A "Completed" log line is now written for messages that are removed from
1848 the spool by the -Mrm option.
1850 12. $host_address is now set to the target address during the checking of
1851 ignore_target_hosts.
1853 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1854 being passed; this would have caused $sender_host_name to have been used if
1855 matching the list had actually called for a host name (not very likely,
1856 since this list is usually IP addresses). A host name is now passed as
1859 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1860 code that specifies a non-restarting handler (typically sigaction() in
1861 modern systems) in an attempt to fix a rare and obscure crash bug.
1863 15. Narrowed the window for a race in the daemon that could cause it to ignore
1864 SIGCHLD signals. This is not a major problem, because they are used only to
1865 wake it up if nothing else does.
1867 16. A malformed maildirsize file could cause Exim to calculate negative values
1868 for the mailbox size or file count. Odd effects could occur as a result.
1869 The maildirsize information is now recalculated if the size or filecount
1872 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1873 support for a long time. Removed HAVE_SYS_VFS_H.
1875 18. Updated exipick to current release from John Jetmore.
1877 19. Allow an empty sender to be matched against a lookup in an address list.
1878 Previously the only cases considered were a regular expression, or an
1881 20. Exim went into a mad DNS lookup loop when doing a callout where the
1882 host was specified on the transport, if the DNS lookup yielded more than
1885 21. The RFC2047 encoding function was originally intended for short strings
1886 such as real names; it was not keeping to the 75-character limit for
1887 encoded words that the RFC imposes. It now respects the limit, and
1888 generates multiple encoded words if necessary. To be on the safe side, I
1889 have increased the buffer size for the ${rfc2047: expansion operator from
1892 22. Failure to deliver a bounce message always caused it to be frozen, even if
1893 there was an errors_to setting on the router. The errors_to setting is now
1896 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1897 canonical form (fully expanded) before being placed in
1898 $sender_host_address.
1900 24. Updated eximstats to version 1.33
1902 25. Include certificate and key file names in error message when GnuTLS fails
1903 to set them up, because the GnuTLS error message doesn't include the name
1904 of the failing file when there is a problem reading it.
1906 26. Expand error message when OpenSSL has problems setting up cert/key files.
1909 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1910 (this can affect the format of dates).
1912 28. exim_tidydb, when checking for the continued existence of a message for
1913 which it has found a message-specific retry record, was not finding
1914 messages that were in split spool directories. Consequently, it was
1915 deleting retry records that should have stayed in existence.
1917 29. eximstats updated to version 1.35
1918 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1919 1.35 - bugfix such that pie charts by volume are generated correctly
1921 30. The SPA authentication driver was not abandoning authentication and moving
1922 on to the next authenticator when an expansion was forced to fail,
1923 contradicting the general specification for all authenticators. Instead it
1924 was generating a temporary error. It now behaves as specified.
1926 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1927 (the order specifies the preference for clients). The order is now AES256,
1928 AES128, 3DES, ARCFOUR128.
1930 31. Small patch to Sieve code - explicitly set From: when generating an
1933 32. Exim crashed if a remote delivery caused a very long error message to be
1934 recorded - for instance if somebody sent an entire SpamAssassin report back
1935 as a large number of 550 error lines. This bug was coincidentally fixed by
1936 increasing the size of one of Exim's internal buffers (big_buffer) that
1937 happened as part of the Exiscan merge. However, to be on the safe side, I
1938 have made the code more robust (and fixed the comments that describe what
1941 33. Some experimental protocols are using DNS PTR records for new purposes. The
1942 keys for these records are domain names, not reversed IP addresses. The
1943 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1944 leaves it alone. Component reversal etc. now happens only for IP addresses.
1947 34. The host_aton() function is supposed to be passed a string that is known
1948 to be a valid IP address. However, in the case of IPv6 addresses, it was
1949 not checking this. This is a hostage to fortune. Exim now panics and dies
1950 if the condition is not met. A case was found where this could be provoked
1951 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1952 components; fortuitously, this particular loophole had already been fixed
1953 by change 4.50/55 or 4.44/33 above.
1955 If there are any other similar loopholes, the new check in host_aton()
1956 itself should stop them being exploited. The report I received stated that
1957 data on the command line could provoke the exploit when Exim was running as
1958 exim, but did not say which command line option was involved. All I could
1959 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1960 running as the user.
1963 35. There was a buffer overflow vulnerability in the SPA authentication code
1964 (which came originally from the Samba project). I have added a test to the
1965 spa_base64_to_bits() function which I hope fixes it.
1968 36. The daemon start-up calls getloadavg() while still root for those OS that
1969 need the first call to be done as root, but it missed one case: when
1970 deliver_queue_load_max is set with deliver_drop_privilege. This is
1971 necessary for the benefit of the queue runner, because there is no re-exec
1972 when deliver_drop_privilege is set.
1974 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1975 was in use, was not putting the data itself into the right store pool;
1976 consequently, it could be overwritten for a subsequent message in the same
1977 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1980 38. Sometimes the final signoff response after QUIT could fail to get
1981 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1982 < 0 before doing a fflush(). This bug looks as though it goes back to the
1983 introduction of TLS in release 3.20, but "sometimes" must have been rare
1984 because the tests only now provoked it.
1990 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1991 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1992 Now it returns an integer. A number of calls were still expecting a T/F
1993 return. Fortuitously, in all cases, the tests worked in OK situations,
1994 which is the norm. However, things would have gone wrong on any write
1995 failures on the smtp file descriptor. This function is used when sending
1996 messages over SMTP and also when doing verify callouts.
1998 2. When Exim is called to do synchronous delivery of a locally submitted
1999 message (the -odf or -odi options), it no longer closes stderr before doing
2002 3. Implemented the mua_wrapper option.
2004 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2006 5. Implemented the functions header_remove(), header_testname(),
2007 header_add_at_position(), and receive_remove_recipient(), and exported them
2010 6. If an ACL "warn" statement specified the addition of headers, Exim already
2011 inserted X-ACL-Warn: at the start if there was no header name. However, it
2012 was not making this test for the second and subsequent header lines if
2013 there were newlines in the string. This meant that an invalid header could
2014 be inserted if Exim was badly configured.
2016 7. Allow an ACL "warn" statement to add header lines at the start or after all
2017 the Received: headers, as well as at the end.
2019 8. Added the rcpt_4xx retry error code.
2021 9. Added postmaster_mailfrom=xxx to callout verification option.
2023 10. Added mailfrom=xxxx to the callout verification option, for verify=
2026 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2027 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2029 12. Inserted some casts to stop certain compilers warning when using pointer
2030 differences as field lengths or precisions in printf-type calls (mostly
2031 affecting debugging statements).
2033 13. Added optional readline() support for -be (dynamically loaded).
2035 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2036 same clock tick as a message's arrival, so that its received time was the
2037 same as the "first fail" time on the retry record, and that message
2038 remained on the queue past the ultimate address timeout, every queue runner
2039 would try a delivery (because it was past the ultimate address timeout) but
2040 after another failure, the ultimate address timeout, which should have then
2041 bounced the address, did not kick in. This was a "< instead of <=" error;
2042 in most cases the first failure would have been in the next clock tick
2043 after the received time, and all would be well.
2045 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2046 being recognized when the domain list was tested by the match_domain
2047 condition in an expansion string.
2049 16. Added the ${str2b64: operator.
2051 17. Exim was always calling setrlimit() to set a large limit for the number of
2052 processes, without checking whether the existing limit was already
2053 adequate. (It did check for the limit on file descriptors.) Furthermore,
2054 errors from getrlimit() and setrlimit() were being ignored. Now they are
2055 logged to the main and panic logs, but Exim does carry on, to try to do its
2056 job under whatever limits there are.
2058 18. Imported PCRE 5.0.
2060 19. Trivial typo in log message " temporarily refused connection" (the leading
2063 20. If the log selector return_path_on_delivery was set and an address was
2064 redirected to /dev/null, the delivery process crashed because it assumed
2065 that a return path would always be set for a "successful" delivery. In this
2066 case, the whole delivery is bypassed as an optimization, and therefore no
2069 21. Internal re-arrangement: the function for sending a challenge and reading
2070 a response while authentication was assuming a zero-terminated challenge
2071 string. It's now changed to take a pointer and a length, to allow for
2072 binary data in such strings.
2074 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2076 23. Exim was not respecting finduser_retries when seeking the login of the
2077 uid under which it was called; it was always trying 10 times. (The default
2078 setting of finduser_retries is zero.) Also, it was sleeping after the final
2079 failure, which is pointless.
2081 24. Implemented tls_on_connect_ports.
2083 25. Implemented acl_smtp_predata.
2085 26. If the domain in control=submission is set empty, Exim assumes that the
2086 authenticated id is a complete email address when it generates From: or
2087 Sender: header lines.
2089 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2090 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2091 chown and chgrp in /bin and hostname in /usr/bin.
2093 28. Exim was keeping the "process log" file open after each use, just as it
2094 does for the main log. This opens the possibility of it remaining open for
2095 long periods when the USR1 signal hits a daemon. Occasional processlog
2096 errors were reported, that could have been caused by this. Anyway, it seems
2097 much more sensible not to leave this file open at all, so that is what now
2100 29. The long-running daemon process does not normally write to the log once it
2101 has entered its main loop, and it closes the log before doing so. This is
2102 so that log files can straightforwardly be renamed and moved. However,
2103 there are a couple of unusual error situations where the daemon does write
2104 log entries, and I had neglected to close the log afterwards.
2106 30. The text of an SMTP error response that was received during a remote
2107 delivery was being truncated at 512 bytes. This is too short for some of
2108 the long messages that one sometimes sees. I've increased the limit to
2111 31. It is now possible to make retry rules that apply only when a message has a
2112 specific sender, in particular, an empty sender.
2114 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2115 it possible to be selective about when SMTP synchronization is enforced.
2117 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2119 32. Implemented hosts_connection_nolog.
2121 33. Added an ACL for QUIT.
2123 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2126 35. Added mailbox_size and mailbox_filecount to appendfile.
2128 36. Added control = no_multiline_responses to ACLs.
2130 37. There was a bug in the logic of the code that waits for the clock to tick
2131 in the case where the clock went backwards by a substantial amount such
2132 that the microsecond fraction of "now" was more than the microsecond
2133 fraction of "then" (but the whole seconds number was less).
2135 38. Added support for the libradius Radius client library this is found on
2136 FreeBSD (previously only the radiusclient library was supported).
2142 1. When certain lookups returned multiple values in the form name=value, the
2143 quoting of the values was not always being done properly. Specifically:
2144 (a) If the value started with a double quote, but contained no whitespace,
2146 (b) If the value contained whitespace other than a space character (i.e.
2147 tabs or newlines or carriage returns) it was not quoted.
2148 This fix has been applied to the mysql and pgsql lookups by writing a
2149 separate quoting function and calling it from the lookup code. The fix
2150 should probably also be applied to nisplus, ibase and oracle lookups, but
2151 since I cannot test any of those, I have not disturbed their existing code.
2153 2. A hit in the callout cache for a specific address caused a log line with no
2154 reason for rejecting RCPT. Now it says "Previous (cached) callout
2155 verification failure".
2157 3. There was an off-by-one bug in the queryprogram router. An over-long
2158 return line was truncated at 256 instead of 255 characters, thereby
2159 overflowing its buffer with the terminating zero. As well as fixing this, I
2160 have increased the buffer size to 1024 (and made a note to document this).
2162 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2163 when Exim is waiting for an SMTP response from a remote server, Exim
2164 restarts its select() call on the socket, thereby resetting its timeout.
2165 This is not a problem when such interrupts are rare. Somebody set up a cron
2166 job to run exiwhat every 2 minutes, which is less than the normal select()
2167 timeout (5 or 10 minutes). This meant that the select() timeout never
2168 kicked in because it was always reset. I have fixed this by comparing the
2169 time when an interrupt arrives with the time at the start of the first call
2170 to select(). If more time than the timeout has elapsed, the interrupt is
2171 treated as a timeout.
2173 5. Some internal re-factoring in preparation for the addition of Sieve
2174 extensions (by MH). In particular, the "personal" test is moved to a
2175 separate function, and given an option for scanning Cc: and Bcc: (which is
2176 not set for Exim filters).
2178 6. When Exim created an email address using the login of the caller as the
2179 local part (e.g. when creating a From: or Sender: header line), it was not
2180 quoting the local part when it contained special characters such as @.
2182 7. Installed new OpenBSD configuration files.
2184 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2185 try to make them clearer.
2187 9. Callout options, other than the timeout value, were being ignored when
2188 verifying sender addresses in header lines. For example, when using
2190 verify = header_sender/callout=no_cache
2192 the cache was (incorrectly) being used.
2194 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2195 only the Cygwin environment.
2197 11. When return_path_on_delivery was set as a log selector, if different remote
2198 addresses in the same message used different return paths and parallel
2199 remote delivery occurred, the wrong values would sometimes be logged.
2200 (Whenever a remote delivery process finished, the return path value from
2201 the most recently started remote delivery process was logged.)
2203 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2204 lines when AUTH and/or TLS are in use. This is the "received protocol"
2205 field. Exim used to use "asmtp" for authenticated SMTP, without any
2206 indication (in the protocol name) for TLS use. Now it follows the RFC and
2207 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2208 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2209 names appear in log lines as well as in Received: header lines.
2211 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2212 extensions, and comparison tests, and to fix some bugs.
2214 14. Changes to the "personal" filter test:
2216 (1) The test was buggy in that it was just doing the equivalent of
2217 "contains" tests on header lines. For example, if a user's address was
2218 anne@some.where, the "personal" test would incorrectly be true for
2220 To: susanne@some.where
2222 This test is now done by extracting each address from the header in turn,
2223 and checking the entire address. Other tests that are part of "personal"
2224 are now done using regular expressions (for example, to check local parts
2225 of addresses in From: header lines).
2227 (2) The list of non-personal local parts in From: addresses has been
2228 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2229 taken from the Sieve specification recommendations.
2231 (3) If the message contains any header line starting with "List-" it is
2232 treated as non-personal.
2234 (4) The test for "circular" in the Subject: header line has been removed
2235 because it now seems ill-conceived.
2237 15. Minor typos in src/EDITME comments corrected.
2239 16. Installed latest exipick from John Jetmore.
2241 17. If headers_add on a router specified a text string that was too long for
2242 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2243 of string_sprintf() is now avoided.
2245 18. $message_body_size was not set (it was always zero) when running the DATA
2246 ACL and the local_scan() function.
2248 19. For the "mail" command in an Exim filter, no default was being set for
2249 the once_repeat time, causing a random time value to be used if "once" was
2250 specified. (If the value happened to be <= 0, no repeat happened.) The
2251 default is now 0s, meaning "never repeat". The "vacation" command was OK
2252 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2253 (I found it when inspecting the code).
2255 20. There is now an overall timeout for performing a callout verification. It
2256 defaults to 4 times the callout timeout, which applies to individual SMTP
2257 commands during the callout. The overall timeout applies when there is more
2258 than one host that can be tried. The timeout is checked before trying the
2259 next host. This prevents very long delays if there are a large number of
2260 hosts and all are timing out (e.g. when the network connections are timing
2261 out). The value of the overall timeout can be changed by specifying an
2262 additional sub-option for "callout", called "maxwait". For example:
2264 verify = sender/callout=5s,maxwait=20s
2266 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2267 to the end before writing, but this should make it even safer).
2269 22. Exim was forgetting that it had advertised PIPELINING for the second and
2270 subsequent messages on an SMTP connection. It was also not resetting its
2271 memory on STARTTLS and an internal HELO.
2273 23. When Exim logs an SMTP synchronization error within a session, it now
2274 records whether PIPELINING has been advertised or not.
2276 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2277 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2278 rather than long int.
2280 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2282 26. Added the never_mail option to autoreply.
2288 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2289 crash if the getsockname() call failed; this can happen if a connection is
2290 closed very soon after it is established. The problem was simply in the
2291 order in which certain operations were done, causing Exim to try to write
2292 to the SMTP stream before it had set up the file descriptor. The bug has
2293 been fixed by making things happen in the correct order.
2299 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2300 before the connection was closed, thus losing the rejection response.
2302 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2303 some early Solaris releases, but causes trouble in current releases where
2304 socklen_t is defined.
2306 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2309 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2312 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2313 that releasing the top of it at the end releases what was used for sub-
2314 expansions (unless the block got too big). However, discard this block if
2315 the first thing is a variable or header, so that we can use its block when
2316 it is dynamic (useful for very large $message_headers, for example).
2318 6. Lookups now cache *every* query, not just the most recent. A new, separate
2319 store pool is used for this. It can be recovered when all lookup caches are
2320 flushed. Lookups now release memory at the end of their result strings.
2321 This has involved some general refactoring of the lookup sources.
2323 7. Some code has been added to the store_xxx() functions to reduce the amount
2324 of flapping under certain conditions.
2326 8. log_incoming_interface used to affect only the <= reception log lines. Now
2327 it causes the local interface and port to be added to several more SMTP log
2328 lines, for example "SMTP connection from", and rejection lines.
2330 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2332 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2334 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2335 could be overwritten at the end of the current message (or the start of a
2336 new message if it was set in a HELO ACL). The value is now preserved for
2337 the duration of the SMTP connection.
2339 12. If a transport had a headers_rewrite setting, and a matching header line
2340 contained an unqualified address, that address was qualified, even if it
2341 did not match any rewriting rules. The underlying bug was that the values
2342 of the flags that permit the existence of unqualified sender and recipient
2343 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2344 non-local messages, and by -bnq for local messages) were not being
2345 preserved with the message after it was received.
2347 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2348 "next input=" as part of the text comprising the host identity instead of
2349 the correct text. The code was using the same buffer for two different
2350 strings. However, depending on which order the printing function evaluated
2351 its arguments, the bug did not always show up. Under Linux, for example, my
2352 test suite worked just fine.
2354 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2355 doesn't work with some older versions of Perl. It has been changed to "my",
2356 which in any case is probably the better facility to use.
2358 15. A really picky compiler found some instances of statements for creating
2359 error messages that either had too many or two few arguments for the format
2362 16. The size of the buffer for calls to the DNS resolver has been increased
2363 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2364 for addresses that have a lot of PTR records. This alleviates a problem; it
2365 does not fully solve it.
2367 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2368 buffer now truncates the list and logs the incident, which is the same
2369 action as happens when Exim is looking up a host name and its aliases.
2370 Previously in this situation something unpredictable would happen;
2371 sometimes it was "internal error: store_reset failed".
2373 18. If a server dropped the connection unexpectedly when an Exim client was
2374 using GnuTLS and trying to read a response, the client delivery process
2375 crashed while trying to generate an error log message.
2377 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2378 string, for example:
2380 warn message = H1: something\nH2: something
2382 the text was added as a single header line from Exim's point of view
2383 though it ended up OK in the delivered message. However, searching for the
2384 second and subsequent header lines using $h_h2: did not work. This has been
2385 fixed. Similarly, if a system filter added multiple headers in this way,
2386 the routers could not see them.
2388 20. Expanded the error message when iplsearch is called with an invalid key to
2389 suggest using net-iplsearch in a host list.
2391 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2392 ACLs are no longer actually imposed (and a message to that effect is
2395 22. If a "gecos" field in a passwd entry contained escaped characters, in
2396 particular, if it contained a \" sequence, Exim got it wrong when building
2397 a From: or a Sender: header from that name. A second bug also caused
2398 incorrect handling when an unquoted " was present following a character
2399 that needed quoting.
2401 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2402 was not being matched caselessly.
2404 24. Arranged for all hyphens in the exim.8 source to be escaped with
2407 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2408 properly. Recipient callout cache records were still being keyed to include
2409 the sender, even when use_sender was set false. This led to far more
2410 callouts that were necessary. The sender is no longer included in the key
2411 when use_sender is false.
2413 26. Added "control = submission" modifier to ACLs.
2415 27. Added the ${base62d: operator to decode base 62 numbers.
2417 28. dnsdb lookups can now access SRV records.
2419 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2420 the configuration file.
2422 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2423 (-v) mode. This makes the output for a verbose queue run more intelligible.
2425 31. Added a use_postmaster feature to recipient callouts.
2427 32. Added the $body_zerocount variable, containing the number of binary zero
2428 bytes in the message body.
2430 33. The time of last modification of the "new" subdirectory is now used as the
2431 "mailbox time last read" when there is a quota error for a maildir
2434 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2436 35. Added +ignore_unknown as a special item in host lists.
2438 36. Code for decoding IPv6 addresses in host lists is now included, even if
2439 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2440 address was recognized as an IP address, but was then not correctly decoded
2441 into binary, causing unexpected and incorrect effects when compared with
2448 1. Very minor rewording of debugging text in manualroute to say "list of
2449 hosts" instead of "hostlist".
2451 2. If verify=header_syntax was set, and a header line with an unqualified
2452 address (no domain) and a large number of spaces between the end of the
2453 name and the colon was received, the reception process suffered a buffer
2454 overflow, and (when I tested it) crashed. This was caused by some obsolete
2455 code that should have been removed. The fix is to remove it!
2457 3. When running in the test harness, delay a bit after writing a bounce
2458 message to get a bit more predictability in the log output.
2460 4. Added a call to search_tidyup() just before forking a reception process. In
2461 theory, someone could use a lookup in the expansion of smtp_accept_max_
2462 per_host which, without the tidyup, could leave open a database connection.
2464 5. Added the variables $recipient_data and $sender_data which get set from a
2465 lookup success in an ACL "recipients" or "senders" condition, or a router
2466 "senders" option, similar to $domain_data and $local_part_data.
2468 6. Moved the writing of debug_print from before to after the "senders" test
2471 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2472 problems for message scanning, either using a data ACL, or using
2473 local_scan() because the Received: header was not generated till after they
2474 were called (in order to set the time as the time of reception completion).
2475 I have revised the way this works. The header is now generated after the
2476 body is received, but before the ACL or local_scan() are called. After they
2477 are run, the timestamp in the header is updated.
2483 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2484 before starting a queue runner without re-exec. This happened only when
2485 deliver_drop_privilege was set or when the Exim user was set to root. The
2486 effect of the bug was that timeouts during subsequent deliveries caused
2487 crashes instead of being properly handled. The handler is now left at its
2488 default (and expected) setting.
2490 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2491 message, again when deliver_drop_privilege is set or Exim is run as root.
2492 The bug described in (1) was not present in this case, but the tidying up
2493 of the other signals was missing. I have made the two cases consistent.
2495 3. The ignore_target_hosts setting on a manualroute router was being ignored
2496 for hosts that were looked up using the /MX notation.
2498 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2501 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2502 operated on the sender address. After changing the $sender_address to <>
2503 for the sender address verify, Exim was re-instated it as the original
2504 (before rewriting) address, but remembering that it had rewritten it, so it
2505 wasn't rewriting it again. This bug also had the effect of breaking the
2506 sender address verification caching when the sender address was rewritten.
2508 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2509 This has been changed so that if the ip literal address matches
2510 ignore_target_hosts, the router declines.
2512 7. Added expansion conditions match_domain, match_address, and match_local_
2513 part (NOT match_host).
2515 8. The placeholder for the Received: header didn't have a length field set.
2517 9. Added code to Exim itself and to exim_lock to test for a specific race
2518 condition that could lead to file corruption when using MBX delivery. The
2519 issue is with the lockfile that is created in /tmp. If this file is removed
2520 after a process has opened it but before that process has acquired a lock,
2521 there is the potential for a second process to recreate the file and also
2522 acquire a lock. This could lead to two Exim processes writing to the file
2523 at the same time. The added code performs the same test as UW imapd; it
2524 checks after acquiring the lock that its file descriptor still refers to
2525 the same named file.
2527 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2528 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2531 11. Added the smtp_active_hostname option. If used, this will typically be made
2532 to depend on the incoming interface address. Because $interface_address is
2533 not set up until the daemon has forked a reception process, error responses
2534 that can happen earlier (such as "too many connections") no longer contain
2537 12. If an expansion in a condition on a "warn" statement fails because a lookup
2538 defers, the "warn" statement is abandoned, and the next ACL statement is
2539 processed. Previously this caused the whole ACL to be aborted.
2541 13. Added the iplsearch lookup type.
2543 14. Added ident_timeout as a log selector.
2545 15. Added tls_certificate_verified as a log selector.
2547 16. Added a global option tls_require_ciphers (compare the smtp transport
2548 option of the same name). This controls incoming TLS connections.
2550 17. I finally figured out how to make tls_require_ciphers do a similar thing
2551 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2552 before starting the TLS session.
2554 18. Tabs are now shown as \t in -bP output.
2556 19. If the log selector return_path_on_delivery was set, Exim crashed when
2557 bouncing a message because it had too many Received: header lines.
2559 20. If two routers both had headers_remove settings, and the first one included
2560 a superfluous trailing colon, the final name in the first list and the
2561 first name in the second list were incorrectly joined into one item (with a
2562 colon in the middle).
2568 1. Added -C and -D options to the exinext utility, mainly to make it easier
2569 to include in the automated testing, but these could be helpful when
2570 multiple configurations are in use.
2572 2. The exinext utility was not formatting the output nicely when there was
2573 an alternate port involved in the retry record key, nor when there was a
2574 message id as well (for retries that were specific to a specific message
2575 and a specific host). It was also confused by IPv6 addresses, because of
2576 the additional colons they contain. I have fixed the IPv4 problem, and
2577 patched it up to do a reasonable job for IPv6.
2579 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2580 delivery, the log line now contains "pipelined" if PIPELINING was used.
2582 4. An SMTP transport process used to panic and die if the bind() call to set
2583 an explicit outgoing interface failed. This has been changed; it is now
2584 treated in the same way as a connect() failure.
2586 5. A reference to $sender_host_name in the part of a conditional expansion
2587 that was being skipped was still causing a DNS lookup. This no longer
2590 6. The def: expansion condition was not recognizing references to header lines
2591 that used bh_ and bheader_.
2593 7. Added the _cache feature to named lists.
2595 8. The code for checking quota_filecount in the appendfile transport was
2596 allowing one more file than it should have been.
2598 9. For compatibility with Sendmail, the command line option
2606 and sets the incoming protocol and host name (for trusted callers). The
2607 host name and its colon can be omitted when only the protocol is to be set.
2608 Note the Exim already has two private options, -pd and -ps, that refer to
2609 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2610 "s", but I don't think that's a major issue.
2612 10. A number of refactoring changes to the code, none of which should affect
2615 (a) The number of logging options was getting close to filling up the
2616 32-bit word that was used as a bit map. I have split them into two classes:
2617 those that are passed in the argument to log_write(), and those that are
2618 only ever tested independently outside of that function. These are now in
2619 separate 32-bit words, so there is plenty of room for expansion again.
2620 There is no change in the user interface or the logging behaviour.
2622 (b) When building, for example, log lines, the code previously used a
2623 macro that called string_cat() twice, in order to add two strings. This is
2624 not really sufficiently general. Furthermore, there was one instance where
2625 it was actually wrong because one of the argument was used twice, and in
2626 one call a function was used. (As it happened, calling the function twice
2627 did not affect the overall behaviour.) The macro has been replaced by a
2628 function that can join an arbitrary number of extra strings onto a growing
2631 (c) The code for expansion conditions now uses a table and a binary chop
2632 instead of a serial search (which was left over from when there were very
2633 few conditions). Also, it now recognizes conditions like "pam" even when
2634 the relevant support is not compiled in: a suitably worded error message is
2635 given if an attempt is made to use such a condition.
2637 11. Added ${time_interval:xxxxx}.
2639 12. A bug was causing one of the ddress fields not to be passed back correctly
2640 from remote delivery subprocesses. The field in question was not being
2641 subsequently used, so this caused to problems in practice.
2643 13. Added new log selectors queue_time and deliver_time.
2645 14. Might have fixed a bug in maildirsizefile handling that threw up
2646 "unexpected character" debug warnings, and recalculated the data
2647 unnecessarily. In any case, I expanded the warning message to give more
2650 15. Added the message "Restricted characters in address" to the statements in
2651 the default ACL that block characters like @ and % in local parts.
2653 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2654 Three changes have been made:
2656 (a) There was a serious bug; a negative response to MAIL caused the whole
2657 recipient domain to be cached as invalid, thereby blocking all messages
2658 to all local parts at the same domain, from all senders. This bug has
2659 been fixed. The domain is no longer cached after a negative response to
2660 MAIL if the sender used is not empty.
2662 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2665 (c) A new callout option, "use_sender" has been added for people who want
2666 the modified behaviour.
2672 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2675 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2676 indeed breaks things for older releases.
2678 3. Added additional logging to the case where there is a problem reading data
2679 from a filter that is running in a subprocess using a pipe, in order to
2680 try to track down a specific problem.
2682 4. Testing facility fudge: when running in the test harness and attempting
2683 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2684 getting "No route to host". Convert this to a timeout.
2686 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2689 6. Some OS don't have socklen_t but use size_t instead. This affects the
2690 fifth argument of getsockopt() amongst other things. This is now
2691 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2692 can be set for individual OS. I have set it for SunOS5, OSF1, and
2693 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2694 some earlier ones do not.
2696 7. Change 4.30/15 was not doing the test caselessly.
2698 8. The standard form for an IPv6 address literal was being rejected by address
2699 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2700 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2701 this, as well as the form without the "IPv6" on the front (but only when
2702 address literals are enabled, of course).
2704 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2706 10. Exim crashed if a message with an empty sender address specified by -f
2707 encountered a router with an errors_to setting. This could be provoked only
2708 by a command such as
2712 where an empty string was supplied; "<>" did not hit this bug.
2714 11. Installed PCRE release 4.5.
2716 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2717 remained set. It is now erased.
2719 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2720 times from message ids (which are base 36 rather than the normal 62).
2722 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2723 were being counted as actual protocol errors, and logged if the log
2724 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2725 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2726 and DATA following a set of rejected RCPTs do not count as protocol errors.
2727 In other words, Exim assumes they were pipelined, though this may not
2728 actually be the case. Of course, in all cases the client gets an
2729 appropriate error code.
2731 15. If a lookup fails in an ACL condition, a message about the failure may
2732 be available; it is used if testing the ACL cannot continue, because most
2733 such messages specify what the cause of the deferral is. However, some
2734 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2735 that caused an old message to be retained and used if a later statement
2736 caused a defer, replacing the real cause of the deferral.
2738 16. If an IP address had so many PTR records that the DNS lookup buffer
2739 was not large enough to hold them, Exim could crash while trying to process
2740 the truncated data. It now detects and logs this case.
2742 17. Further to 4.21/58, another change has been made: if (and only if) the
2743 first line of a message (the first header line) ends with CRLF, a bare LF
2744 in a subsequent header line has a space inserted after it, so as not to
2745 terminate the header.
2747 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2748 unnecessarily, used atoi() instead of strtol(), and didn't check the
2749 termination when getting file sizes from file names by regex.
2751 19. Completely re-implemented the support for maildirsize files, in the light
2752 of a number of problems with the previous contributed implementation
2753 (4.30/29). In particular:
2755 . If the quota is zero, the maildirsize file is maintained, but no quota is
2758 . If the maildir directory does not exist, it is created before any attempt
2759 to write a maildirsize file.
2761 . The quota value in the file is just a cache; if the quota is changed in
2762 the transport, the new value overrides.
2764 . A regular expression is available for excluding directories from the
2767 20. The autoreply transport checks the characters in options that define the
2768 message's headers; it allows continued headers, but it was checking with
2769 isspace() after an embedded newline instead of explicitly looking for a
2772 21. If all the "regular" hosts to which an address was routed had passed their
2773 expiry times, and had not reached their retry times, the address was
2774 bounced, even if fallback hosts were defined. Now Exim should go on to try
2777 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2778 equivalent code in the SMTP transport. Some hosts send humungous responses
2779 to HELO/EHLO, more than 1024 it seems.
2781 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2782 gives compiler warnings in some environments. I've now done it "properly",
2785 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2786 (because of problems with the built-in one) was declared to return uschar *
2787 instead of char *, causing compiler failure.
2789 25. Fixed a file descriptor leak when processing alias/forward files.
2791 26. Fixed a minor format string issue in dbfn.c.
2793 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2795 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2796 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2799 29. When a sender address is verified, it is cached, to save repeating the test
2800 when there is more than one recipient in a message. However, when the
2801 verification involves a callout, it is possible for different callout
2802 options to be set for different recipients. It is too complicated to keep
2803 track of this in the cache, so now Exim always runs a verification when a
2804 callout is required, relying on the callout cache for the optimization.
2805 The overhead is duplication of the address routing, but this should not be
2808 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2809 to be verified with callout=postmaster, and the main callout worked but the
2810 postmaster check failed, the verification correctly failed. However, if a
2811 subsequent RCPT command asked for sender verification *without* the
2812 postmaster check, incorrect caching caused this verification also to fail,
2815 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2816 it was not caching the DNS options (qualify_single, search_parents) that
2817 were used when the lookup failed. A subsequent lookup with different
2818 options therefore always gave the same answer, though there were cases
2819 where it should not have. (Example: a "domains = !$mx_any" option on a
2820 dnslookup router: the "domains" option is always processed without any
2821 widening, but the router might have qualify_single set.) Now Exim uses the
2822 cached value only when the same options are set.
2824 32. Added John Jetmore's "exipick" utility to the distribution.
2826 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2827 than a timeout (e.g. a certificate is required, and is not provided), an
2828 Exim server now closes the connection immediately. Previously it waited for
2829 the client to close - but if the client is SSL, it seems that they each
2830 wait for each other, leading to a delay before one of them times out.
2832 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2833 maintained 0.8.x compatibility because I don't think many are using it, and
2834 it is clearly obsolete.
2836 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2839 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2840 client certificate was expired. A simple patch fixes this, though I don't
2841 understand the full logic of why the verify callback is called multiple
2844 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2845 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2846 which causes problems with some clients (such as the Certicom SSL Plus
2847 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2848 disables the coutermeasure allowing Eudora to connect."
2850 38. Exim was not checking that a write() to a log file succeeded. This could
2851 lead to Bad Things if a log got too big, in particular if it hit a file
2852 size limit. Exim now panics and dies if it cannot write to a log file, just
2853 as it does if it cannot open a log file.
2855 39. Modified OS/Makefile-Linux so that it now contains
2857 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2859 The two -D definitions ensure that Exim is compiled with large file
2860 support, which makes it possible to handle log files that are bigger than
2863 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2864 instance) a domain was checked against a named list that involved a lookup,
2865 causing $domain_data to be set, then another domain was checked against the
2866 same list, then the first domain was re-checked, the value of $domain_data
2867 after the final check could be wrong. In particular, if the second check
2868 failed, it could be set empty. This bug probably also applied to
2871 41. The strip_trailing_dot option was not being applied to the address given
2872 with the -f command-line option.
2874 42. The code for reading a message's header from the spool was incrementing
2875 $received_count, but never initializing it. This meant that the value was
2876 incorrect (doubled) while delivering a message in the same process in which
2877 it was received. In the most common configuration of Exim, this never
2878 happens - a fresh exec is done - but it can happen when
2879 deliver_drop_privilege is set.
2881 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2882 it now includes up to 150 characters of the unexpected data in the log
2885 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2886 and building data strings. The size of both of these buffers was 10 000
2887 bytes - far larger than anybody would *ever* want, thought I. Needless to
2888 say, somebody hit the limit. I have increased the maximum line length to
2889 20 000 and the maximum data length of concatenated lines to 100 000. I have
2890 also fixed two bugs, because there was no checking on these buffers. Tsk,
2891 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2892 buffer is too small.
2894 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2895 lsearch lookups. Now it does.
2897 46. When parsing a route_list item in a manualroute router, a fixed-length
2898 buffer was used for the list of hosts. I made this 1024 bytes long,
2899 thinking that nobody would ever have a list of hosts that long. Wrong.
2900 Somebody had a whole pile of complicated expansion conditions, and the
2901 string was silently truncated, leading to an expansion error. It turns out
2902 that it is easier to change to an unlimited length (owing to other changes
2903 that have happened since this code was originally written) than to build
2904 structure for giving a limitation error. The length of the item that
2905 expands into the list of hosts is now unlimited.
2907 47. The lsearch lookup could not handle data where the length of text line was
2908 more than 4095 characters. Such lines were truncated, leading to shortened
2909 data being returned. It should now handle lines of any length.
2911 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2912 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2915 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2916 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2917 no longer happens in comment lines. A list of replacements is now placed
2918 at the head of all of the source files, except those whose only change is
2919 to replace PERL_COMMAND in the very first #! line.
2921 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2922 messages on the queue, with a bottom-up merge sort, using code contributed
2923 by Michael Haardt. This should make operations like -bp somewhat faster on
2924 large queues. It won't affect queue runners, except when queue_run_in_order
2927 51. Installed eximstats 1.31 in the distribution.
2929 52. Added support for SRV lookups to the dnslookup router.
2931 53. If an ACL referred to $message_body or $message_body_end, the value was not
2932 reset for any messages that followed in the same SMTP session.
2934 54. The store-handling optimization for building very long strings was not
2935 differentiating between the different store pools. I don't think this
2936 actually made any difference in practice, but I've tidied it.
2938 55. While running the routers to verify a sender address, $sender_address
2939 was still set to the sender address. This is wrong, because when routing to
2940 send a bounce to the sender, it would be empty. Therefore, I have changed
2941 it so that, while verifying a sender address, $sender_address is set to <>.
2942 (There is no change to what happens when verifying a recipient address.)
2944 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2945 target A or AAAA records (if not already returned) without resetting the
2946 qualify_single or search_parents options of the DNS resolver. These are
2947 inappropriate in this case because the targets of MX and SRV records must
2948 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2949 target that, when qualified, matched something in the local domain. These
2950 two options are now turned off when doing these lookups.
2952 57. It seems that at least some releases of Reiserfs (which does not have the
2953 concept of a fixed number of inodes) returns zero and not -1 for the
2954 number of available inodes. This interacted badly with check_spool_inodes,
2955 which assumed that -1 was the "no such thing" setting. What I have done is
2956 to check that the total number of inodes is greater than zero before doing
2957 the test of how many are available.
2959 58. When a "warn" ACL statement has a log_message modifier, the message is
2960 remembered, and not repeated. This is to avoid a lot of repetition when a
2961 message has many recipients that cause the same warning to be written.
2962 Howewer, Exim was preserving the list of already written lines for an
2963 entire SMTP session, which doesn't seem right. The memory is now reset if a
2964 new message is started.
2966 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2967 debugging output unless log_rewrite was also set.
2969 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2970 of (int)(handle) when we know that handle contains (void *)(-1).
2972 61. The Exim daemon panic-logs an error return when it closes the incoming
2973 connection. However "connection reset by peer" seems to be common, and
2974 isn't really an error worthy of noting specially, so that particular error
2977 62. When Exim is trying to find all the local interfaces, it used to panic and
2978 die if the ioctl to get the interface flags failed. However, it seems that
2979 on at least one OS (Solaris 9) it is possible to have an interface that is
2980 included in the list of interfaces, but for which you get a failure error
2981 for this call. This happens when the interface is not "plumbed" into a
2982 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2983 failure of the "get flags" call assumes that the interface is down.
2985 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2986 makes life easier for people who are doing arithmetic on fields extracted
2987 from dates, where you often get leading zeros that should not be
2988 interpreted as octal.
2990 64. Added qualify_domain to the redirect router, to override the global
2993 65. If a pathologically long header line contained very many addresses (the
2994 report of this problem mentioned 10 000) and each of them was rewritten,
2995 Exim could use up a very large amount of memory. (It kept on making new
2996 copies of the header line as it rewrote, and never released the old ones.)
2997 At the expense of a bit more processing, the header rewriting function has
2998 been changed so that it no longer eats memory in this way.
3000 66. The generation of the Received: header has been moved from the time that a
3001 message starts to be received, to the time that it finishes. The timestamp
3002 in the Received: header should now be very close to that of the <= log
3003 line. There are two side-effects of this change:
3005 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3006 logged header lines no longer include the local Received: line, because
3007 it has not yet been created. The same applies to a copy of the message
3008 that is returned to a non-SMTP sender when a message is rejected.
3010 (b) When a filter file is tested using -bf, no additional Received: header
3011 is added to the test message. After some thought, I decided that this
3014 This change does not affect the value of $received_for. It is still set
3015 after address rewriting, but before local_scan() is called.
3017 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3019 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3020 gave an unhelpful panic error message, and a defer error. I have managed to
3021 change this behaviour so that it now rejects any supplied certificate,
3022 which seems right, as the list of acceptable certificates is empty.
3024 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3025 gave an unhelpful defer error. I have not managed to make this reject any
3026 supplied certificates, but the error message it gives is "no certificate
3027 supplied", which is not helpful.
3029 70. exigrep's output now also includes lines that are not associated with any
3030 message, but which match the given pattern. Implemented by a patch from
3031 Martin Sluka, which also tidied up the Perl a bit.
3033 71. Recipient callout verification, like sender verification, was using <> in
3034 the MAIL FROM command. This isn't really the right thing, since the actual
3035 sender may affect whether the remote host accepts the recipient or not. I
3036 have changed it to use the actual sender in the callout; this means that
3037 the cache record is now keyed on a recipient/sender pair, not just the
3038 recipient address. There doesn't seem to be a real danger of callout loops,
3039 since a callout by the remote host to check the sender would use <>.
3040 [SEE ABOVE: changed after hitting problems.]
3042 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3043 temporary errors. However, in the case of such a code being given after
3044 the end of a data transmission (i.e. after ".") Exim was failing to write
3045 a retry record for the message. (Yes, there was some broken host that was
3046 actually sending 8xx at this point.)
3048 73. An unknown lookup type in a host list could cause Exim to panic-die when
3049 the list was checked. (An example that provoked this was putting <; in the
3050 middle of a list instead of at the start.) If this happened during a DATA
3051 ACL check, a -D file could be left lying around. This kind of configuration
3052 error no longer causes Exim to die; instead it causes a defer errror. The
3053 incident is still logged to the main and panic logs.
3055 74. Buglet left over from Exim 3 conversion. The message "too many messages
3056 in one connection" was written to the rejectlog but not the mainlog, except
3057 when address rewriting (yes!) was being logged.
3059 75. Added write_rejectlog option.
3061 76. When a system filter was run not as root (that is, when system_filter_user
3062 was set), the values of the $n variables were not being returned to the
3063 main process; thus, they were not subsequently available in the $sn
3066 77. Added +return_path_on_delivery log selector.
3068 78. A connection timeout was being treated differently from recipients deferred
3069 when testing hosts_max_try with a message that was older than the host's
3070 retry timeout. (The host should not be counted, thus allowing all hosts to
3071 be tried at least once before bouncing.) This may have been the cause of an
3072 occasionally reported bug whereby a message would remain on the queue
3073 longer than the retry timeout, but would be bounced if a delivery was
3074 forced. I say "may" because I never totally pinned down the problem;
3075 setting up timeout/retry tests is difficult. See also the next item.
3077 79. The ultimate address timeout was not being applied to errors that involved
3078 a combination of host plus message (for example, a timeout on a MAIL
3079 command). When an address resolved to a number of possible hosts, and they
3080 were not all tried for each delivery (e.g. because of hosts_max_try), a
3081 message could remain on the queue longer than the retry timeout.
3083 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3086 81. Fixed an obscure SMTP outgoing bug which required at least the following
3087 conditions: (a) there was another message waiting for the same server;
3088 (b) the server returned 5xx to all RCPT commands in the first message so
3089 that the message was not completed; (c) the server dropped the connection
3090 or gave a negative response to the RSET that Exim sends to abort the
3091 transaction. The observed case was a dropped connection after DATA that had
3092 been sent in pipelining mode. That is, the server had advertised PIPELINING
3093 but was not implementing it correctly. The effect of the bug was incorrect
3094 behaviour, such as trying another host, and this could lead to a crash.
3100 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3101 and daemon.c were passed as pointers to ints; they should have been
3102 pointers to socklen_t variables (which are typically unsigned ints).
3104 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3107 3. Fixed a really odd bug that affected only the testing scheme; patching a
3108 certain fixed string in the binary changed the value of another string that
3109 happened to be identical to the end of the original first string.
3111 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3112 name", it returns that address as the IP address. On some operating
3113 systems (e.g. Solaris), it also passes back the IP address string as the
3114 "host name". However, on others (e.g. Linux), it passes back an empty
3115 string. Exim wasn't checking for this, and was changing the host name to an
3116 empty string, assuming it had been canonicized.
3118 5. Although rare, it is permitted to have more than one PTR record for a given
3119 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3120 all the names associated with an address, because they do in Solaris.
3121 However, it seems that they do not in Linux for data that comes from the
3122 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3123 I found this out when I moved to a new Linux workstation and tried to run
3124 the Exim test suite.
3126 To get round this problem I have changed the code so that it now does its
3127 own call to the DNS to look up PTR records when searching for a host name.
3128 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3129 addresses that are only in /etc/hosts are still found.
3131 This behaviour is, however, controlled by an option called host_lookup_
3132 order, which defaults to "bydns:byaddr". If people want to use the other
3133 order, or indeed, just use one or the other means of lookup, they can
3134 specify it in this variable.
3136 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3137 some operating systems, this comes back from gethostbyaddr() as an empty
3138 string, and this is what Exim used to test for. However, it seems that in
3139 other systems, "." is yielded. Exim now tests for this case too.
3141 7. The values of check_spool_space and check_log_space are now held internally
3142 as a number of kilobytes instead of an absolute number of bytes. If a
3143 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3144 kilobyte. This means that much larger values can be stored.
3146 8. Exim monitor: an attempt to get the action menu when not actually pointing
3147 at a message produces an empty menu entitled "No message selected". This
3148 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3149 no entries in it ("Shell widget menu has zero width and/or height"). So I
3150 have added a single, blank menu entry in this case.
3152 9. Added ${quote_local_part.
3154 10. MIME decoding is now applied to the contents of Subject: header lines when
3157 11. Now that a reference to $sender_host_address automatically causes a reverse
3158 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3159 host lookup before query-style lookups in lists that might use this
3160 variable. This has therefore been abolished, and the "net-" prefix is no
3161 longer necessary for query-style lookups.
3163 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3164 have been a typo for LFLAGS, so it has been changed.
3166 13. The install script calls Exim with "-C /dev/null" in order to find the
3167 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3168 to be output. Howeve, since Exim outputs its version number before the
3169 error, it didn't break the script. It just looked ugly. I fixed this by
3170 always allowing "-C /dev/null" if the caller is root.
3172 14. Ignore overlarge ACL variable number when reading spool file - insurance
3173 against a later release with more variables having written the file.
3175 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3176 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3177 this, as well as the form without the "IPv6" on the front.
3179 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3180 OS/Makefile-Darwin file.
3182 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3183 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3185 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3186 variable. However, some OS use ints for inodes. I've added cast to long int
3187 to get rid of the compiler warning.
3189 19. I had forgotten to lock out "/../" in configuration file names when
3190 ALT_CONFIG_PREFIX was set.
3192 20. Routers used for verification do not need to specify transports. However,
3193 if such a router generated a host list, and callout was configured, Exim
3194 crashed, because it could not find a port number from the (non-existent)
3195 transport. It now assumes port 25 in this circumstance.
3197 21. Added the -t option to exigrep.
3199 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3200 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3201 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3202 them is set, LOOKUP_LSEARCH is forced.
3204 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3206 24. Added sender and host information to the "rejected by local_scan()" log
3207 line; previously there was no indication of these.
3209 25. Added .include_if_exists.
3211 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3212 Linux. It turns out that not all file systems support this. Apparently some
3213 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3214 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3215 not supported on the file descriptor, is now ignored when Exim is trying to
3216 sync a directory. This applies only to Linux.
3218 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3220 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3221 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3224 29. Added support for maildirsize files from supplied patch (modified a bit).
3226 30. The use of :fail: followed by an empty string could lead Exim to respond to
3227 sender verification failures with (e.g.):
3229 550 Verification failed for <xxx>
3230 550 Sender verify failed
3232 where the first response line was missing the '-' that indicates it is not
3233 the final line of the response.
3235 31. The loop for finding the name of the user that called Exim had a hardwired
3236 limit of 10; it now uses the value of finduser_retries, which is used for
3237 all other user lookups.
3239 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3242 33. Exim was neglecting to zero errno before one call of strtol() when
3243 expanding a string and expecting an integer value. On some systems this
3244 resulted in spurious "integer overflow" errors. Also, it was casting the
3245 result into an int without checking.
3247 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3248 did not work. The code looks as if it has *never* worked, though it appears
3249 to have been documented since at least releast 1.62. I have made it work.
3251 35. The "timeout_DNS" error in retry rules, also documented since at least
3252 1.62, also never worked. As it isn't clear exactly what this means, and
3253 clearly it isn't a major issue, I have abolished the feature by treating it
3254 as "timeout", and writing a warning to the main and panic logs.
3256 36. The display of retry rules for -brt wasn't always showing the error code
3259 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3260 timeout_connect_A, timeout_connect_MX.
3262 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3263 to the empty sender.
3265 39. The daemon was not analysing the content of -oX till after it had closed
3266 stderr and disconnected from the controlling terminal. This meant that any
3267 syntax errors were only noted on the panic log, and the return code from
3268 the command was 0. By re-arranging the code a little, I've made the
3269 decoding happen first, so such errors now appear on stderr, and the return
3270 code is 1. However, the actual setting up of the sockets still happens in
3271 the disconnected process, so errors there are still only recorded on the
3274 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3275 connections (as happens on some IP stacks) was logged at start up time as
3276 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3277 it from "IPv6 and IPv4", which means that two separate sockets are being
3280 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3281 says whether AF_INET or AF_INET6 was passed as an argument.
3283 42. Exiwhat output was messed up when time zones were included in log
3286 43. Exiwhat now gives more information about the daemon's listening ports,
3287 and whether -tls-on-connect was used.
3289 44. The "port" option of the smtp transport is now expanded.
3291 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3292 silently ignored. Now an error message is written to the main and panic
3295 46. There's a new ACL modifier called "logwrite" which writes to a log file
3296 as soon as it is encountered.
3298 47. Added $local_user_uid and $local_user_gid at routing time.
3300 48. Exim crashed when trying to verify a sender address that was being
3303 49. Exim was recognizing only a space character after ".include". It now also
3304 recognizes a tab character.
3306 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3307 extracting the relevant information from the specification. The man page no
3308 longer contains scrambled data for the -d option, and I've added a section
3309 at the front about calling Exim under different names.
3311 51. Added "extra_headers" argument to the "mail" command in filter files.
3313 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3316 53. Installed eximstats 1.29.
3318 54. Added transport_filter_timeout as a generic transport option.
3320 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3321 Cc: header lines. This was required by RFC 822, but it not required by RFC
3324 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3325 incoming messages that did not have them. Now it does so only if the
3326 message originates locally, that is, if there is no associated remote host
3327 address. When Resent- header lines are present, this applies to the Resent-
3328 lines rather than the non-Resent- lines.
3330 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3331 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3333 58. Messages for configuration errors now include the name of the main
3334 configuration file - useful now that there may be more than one file in a
3335 list (.included file names were always shown).
3337 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3338 for those rare installations that do not start the daemon as root or run it
3339 setuid root. I've cut out the call to initgroups() if the daemon is not
3342 60. The Exim user and group can now be bound into the binary as text strings
3343 that are looked up at the start of Exim's processing.
3345 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3347 62. Added $mailstore_basename variable.
3349 63. Installed patch to sieve.c from Michael Haardt.
3351 64. When Exim failed to open the panic log after failing to open the main log,
3352 the original message it was trying to log was written to stderr and debug
3353 output, but if they were not available (the usual case in production), it
3354 was lost. Now it is written to syslog before the two lines that record the
3355 failures to open the logs.
3357 65. Users' Exim filters run in subprocesses under the user's uid. It is
3358 possible for a "deliver" command or an alias in a "personal" command to
3359 provoke an address rewrite. If logging of address rewriting is configured,
3360 this fails because the process is not running as root or exim. There may be
3361 a better way of dealing with this, but for the moment (because 4.30 needs
3362 to be released), I have disabled address rewrite logging when running a
3363 filter in a non-root, non-exim process.
3369 1. The buildconfig auxiliary program wasn't quoting the value set for
3370 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3371 not defined. This bug was masked in 4.22 by the effect that was fixed in
3374 2. Some messages that were rejected after a message id was allocated were
3375 shown as "incomplete" by exigrep. It no longer does this for messages that
3376 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3378 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3379 have allow_domain_literals set, the ID did not get logged in the <= line.
3380 Domain literals are now always recognized in Message-ID: header lines.
3382 4. The first argument for a ${extract expansion item is the key name or field
3383 number. Leading and trailing spaces in this item were not being ignored,
3384 causing some misleading effects.
3386 5. When deliver_drop_privilege was set, single queue runner processes started
3387 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3388 same command in the process it spins off) were not dropping privilege.
3390 6. When the daemon running as "exim" started a queue runner, it always
3391 re-executed Exim in the spun-off process. This is a waste of effort when
3392 deliver_drop_privilege is set. The new process now just calls the
3393 queue-runner function directly.
3399 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3402 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3403 ignored. Though the use of -oP was forcing the writing of a pid file, it
3404 was always written to the default place.
3406 3. If the message "no IP address found for host xxxx" is generated during
3407 incoming verification, it is now followed by identification of the incoming
3408 connection (so you can more easily find what provoked it).
3410 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3412 5. Added some features to "harden" Exim a bit more against certain attacks:
3414 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3415 be put in Local/Makefile. This is like the never_users runtime option,
3416 but it cannot be overridden. The default setting is "root".
3418 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3419 prefix string with which any file named in a -C command line option
3422 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3423 is retained for -C and -D only if the caller of Exim is root. Without
3424 it, the exim user may also use -C and -D and retain privilege.
3426 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3427 command line option is disabled.
3429 6. Macro names set by the -D option must start with an upper case letter, just
3430 like macro names defined in the configuration file.
3432 7. Added "dereference=" facility to LDAP.
3434 8. Two instances of the typo "uknown" in the source files are fixed.
3436 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3437 the Configure-Makefile script screwed up while processing it.
3439 10. Incorporated PCRE 4.4.
3441 11. The SMTP synchronization check was not operating right at the start of an
3442 SMTP session. For example, it could not catch a HELO sent before the client
3443 waited for the greeting. There is now a check for outstanding input at the
3444 point when the greeting is written. Because of the duplex, asynchronous
3445 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3446 way, but not yet received, when the check is performed.
3448 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3449 on TCP/IP sockets, because this apparently causes some broken clients to
3452 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3453 unchanged) from the Cygwin maintainer.
3455 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3456 was supported instead of testing for mbx. Effectively a typo.
3458 15. The spa authenticator server code was not checking that the input it
3459 received was valid base64.
3461 16. The debug output line for the "set" modifier in ACLs was not showing the
3462 name of the variable that was being set.
3464 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3466 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3467 lookup on its own. Something else was needed to trigger the lookup. For
3468 example, a match in host_lookup or the need for a host name in a host list.
3469 Now, if $sender_host_name is referenced and the host name has not yet been
3470 looked up, a lookup is performed. If the lookup fails, the variable remains
3471 empty, and $host_lookup_failed is set to "1".
3473 19. Added "eqi" as a case-independent comparison operator.
3475 20. The saslauthd authentication condition could segfault if neither service
3476 nor realm was specified.
3478 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3479 error message that was logged was misleading, and incoming SMTP
3480 connections were dropped. The message is now more accurate, and temporary
3481 errors are given to SMTP connections.
3483 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3484 (except RSET) with a 421 error, until QUIT is received. However, it was
3485 failing to send a response to QUIT.
3487 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3488 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3489 ACL is now run after the helo_try_verify_hosts code.
3491 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3492 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3493 case-independent, so other case variants are also recognized). Apparently
3494 some systems use these upper case variants.
3496 25. If more than two messages were waiting for the same host, and a transport
3497 filter was specified for the transport, Exim sent two messages over the
3498 same TCP/IP connection, and then failed with "socket operation on non-
3499 socket" when it tried to send the third.
3501 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3503 27. The extern definition of crypt16() in expand.c was not being excluded when
3504 the OS had its own crypt16() function.
3506 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3507 as a preferred synonym for return_size_limit, both as an option and as an
3510 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3512 30. Changed the default configuration ACL to relax the local part checking rule
3513 for addresses that are not in any local domains. For these addresses,
3514 slashes and pipe symbols are allowed within local parts, but the sequence
3515 /../ is explicitly forbidden.
3517 31. SPA server authentication was not clearing the challenge buffer before
3520 32. log_message in a "warn" ACL statement was writing to the reject log as
3521 well as to the main log, which contradicts the documentation and doesn't
3522 seem right (because no rejection is happening). So I have stopped it.
3524 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3525 However, I am unable to do any testing of this.
3527 34. Fixed an infelicity in the appendfile transport. When checking directories
3528 for a mailbox, to see if any needed to be created, it was accidentally
3529 using path names with one or more superfluous leading slashes; tracing
3530 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3532 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3533 contents are added to the log line that is written for every discarded
3534 recipient. (Previously a log_message setting was ignored.)
3536 36. The ${quote: operator now quotes the string if it is empty.
3538 37. The install script runs exim in order to find its version number. If for
3539 some reason other than non-existence or emptiness, which it checks, it
3540 could not run './exim', it was installing it with an empty version number,
3541 i.e. as "exim-". This error state is now caught, and the installation is
3544 38. An argument was missing from the function that creates an error message
3545 when Exim fails to connect to the socket for saslauthd authentication.
3546 This could cause Exim to crash, or give a corrupted message.
3548 39. Added isip, isip4, and isip6 to ${if conditions.
3550 40. The ACL variables $acl_xx are now saved with the message, and can be
3551 accessed later in routers, transports, and filters.
3553 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3554 strings in the file are not string-expanded.
3556 42. If a MAIL command specified a SIZE value that was too large to fit into an
3557 int variable, the check against message_size_limit failed. Such values are
3558 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3559 day this will have to be increased, but I don't think I want to be around
3560 when emails are that large.
3567 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3568 iconv() is not standard in FreeBSD.
3570 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3571 IPv6 enabled. The observed symptom was a segmentation fault on return from
3572 the function os_common_find_running_interfaces() in src/os.c.
3574 3. In the check_special_case() function in daemon.c I had used "errno" as an
3575 argument name, which causes warnings on some systems. This was basically a
3576 typo, since it was named "eno" in the comments!
3578 4. The code that waits for the clock to tick (at a resolution of some fraction
3579 of a second) so as to ensure message-id uniqueness was always waiting for
3580 at least one whole tick, when it could have waited for less. [This is
3581 almost certainly not relevant at current processor speeds, where it is
3582 unlikely to ever wait at all. But we try to future-proof.]
3584 5. The function that sleeps for a time interval that includes fractions of a
3585 second contained a race. It did not block SIGALRM between setting the
3586 timer, and suspending (a couple of lines later). If the interval was short
3587 and the sigsuspend() was delayed until after it had expired, the suspension
3588 never ended. On busy systems this could lead to processes getting stuck for
3591 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3592 process, before it forks any delivery processes. The open lookup caching
3593 mechanism meant that the open file or database connection was passed into
3594 the delivery process. The problem was that delivery processes always tidy
3595 up cached lookup data. This could cause a problem for the next delivery
3596 process started by the queue runner, because the external queue runner
3597 process does not know about the closure. So the next delivery process
3598 still has data in the lookup cache. In the case of a file lookup, there was
3599 no problem because closing a file descriptor in a subprocess doesn't affect
3600 the parent. However, if the lookup was caching a connection to a database,
3601 the connection was closed, and the second delivery process was likely to
3602 see errors such as "PGSQL: query failed: server closed the connection
3603 unexpectedly". The problem has been fixed by closing all cached lookups
3604 in a queue runner before running a delivery process.
3606 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3607 seem to have the "const" qualifier which it has on other OS. I've
3610 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3611 *of the same type* (client or server) with the same public name that an
3612 error should be diagnosed.
3614 9. When Exim looked up a host name for an IP address, but failed to find the
3615 original IP address when looking up the host name (a safety check), it
3616 output the message "<ip address> does not match any IP for NULL", which was
3617 confusing, to say the least. The bug was that the host name should have
3618 appeared instead of "NULL".
3620 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3621 user that is built into the binary, and the -C or -D options is used, root
3622 privilege is dropped before the configuration file is read. In addition,
3623 logging is switched to stderr instead of the normal log files. If the
3624 configuration then re-defines the Exim user, the unprivileged environment
3625 is probably not what is expected, so Exim logs a panic warning message (but
3628 However, if deliver_drop_privilege is set, the unprivileged state may well
3629 be exactly what is intended, so the warning has been cut out in that case,
3630 and Exim is allowed to try to write to its normal log files.
3636 1. smtp_return_error_details was not giving details for temporary sender
3637 or receiver verification errors.
3639 2. Diagnose a configuration error if two authenticators have the same public
3642 3. Exim used not to create the message log file for a message until the first
3643 delivery attempt. This could be confusing when incoming messages were held
3644 for policy or load reasons. The message log file is now created at the time
3645 the message is received, and an initial "Received" line is written to it.
3647 4. The automatically generated man page for command line options had a minor
3648 bug that caused no ill effects; however, a more serious problem was that
3649 the procedure for building the man page automatically didn't always
3650 operate. Consequently, release 4.20 contains an out-of-date version. This
3651 shouldn't happen again.
3653 5. When building Exim with embedded Perl support, the script that builds the
3654 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3655 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3657 6. The freeze_tell option was not being used for messages that were frozen on
3658 arrival, either by an ACL or by local_scan().
3660 7. Added the smtp_incomplete_transaction log selector.
3662 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3663 was accepting AUTH without a new EHLO.
3665 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3666 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3669 10. Logging of TCP/IP connections (when configured) now happens in the main
3670 daemon process instead of the child process, so that the TCP/IP connection
3671 count is more accurate (but it can never be perfect).
3673 11. The use of "drop" in a nested ACL was not being handled correctly in the
3674 outer ACL. Now, if condition failure induced by the nested "drop" causes
3675 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3676 or "require"), the connection is dropped.
3678 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3679 that yield "discard" can now be used with an "accept" or a "discard" verb,
3680 but an error is generated for any others (because I can't see a useful way
3681 to define what should happen).
3683 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3684 are now processed in the same way as lines in the Exim configuration file.
3685 In particular, continuation lines are supported.
3687 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3689 15. Added -ti meaning -t -i.
3691 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3692 domains, and warn by logging if others are found.
3694 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3695 returned from GIFCONF when Exim is trying to find the list of interfaces on
3696 a host. The code in os.c has been modified to copy each ifreq to an aligned
3697 structure in all cases.
3699 Also, in some cases, the returned ifreq's were being copied to a 'struct
3700 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3701 means the last couple of bytes of an IPv6 address could be chopped if the
3702 ifreq contained only a normal sockaddr (14 bytes storage).
3704 18. Named domain lists were not supported in the hosts_treat_as_local option.
3705 An entry such as +xxxx was not recognized, and was treated as a literal
3708 19. Ensure that header lines added by a DATA ACL are included in the reject log
3709 if the ACL subsequently rejects the message.
3711 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3712 MD5 (which is deprecated).
3714 21. When testing a filter file using -bf, Exim was writing a message when it
3715 took the sender from a "From " line in the message, but it was not doing so
3716 when it took $return_path from a Return-Path: header line. It now does.
3718 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3719 with a valid header line field name (a series of printing characters
3720 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3722 23. Changed "disc" in the source to "disk" to conform to the documentation and
3723 the book and for uniformity.
3725 24. Ignore Sendmail's -Ooption=value command line item.
3727 25. When execve() failed while trying to run a command in a pipe transport,
3728 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3729 could be confused with a return value of 69 from the command itself. This
3730 has been changed to 127, the value the shell returns if it is asked to run
3731 a non-existent command. The wording for the related log line suggests a
3732 non-existent command as the problem.
3734 26. If received_header_text expands to an empty string, do not add a Received:
3735 header line to the message. (Well, it adds a token one on the spool, but
3736 marks it "old" so that it doesn't get used or transmitted.)
3738 27. Installed eximstats 1.28 (addition of -nt option).
3740 28. There was no check for failure on the call to getsockname() in the daemon
3741 code. This can fail if there is a shortage of resources on the system, with
3742 ENOMEM, for example. A temporary error is now given on failure.
3744 29. Contrary to the C standard, it seems that in some environments, the
3745 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3746 program. Exim now does this explicitly; it affects the formatting of
3747 timestamps using strftime().
3749 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3750 complaints. I've now initialized all the variables, to avoid this.
3752 32. Header lines added by a system filter were not being "seen" during
3753 transport-time rewrites.
3755 33. The info_callback() function passed to OpenSSL is set up with type void
3756 (*)(SSL *, int, int), as described somewhere. However, when calling the
3757 function (actually a macro) that sets it up, the type void(*)() is
3758 expected. I've put in a cast to prevent warnings from picky compilers.
3760 34. If a DNS black list lookup found a CNAME record, but there were no A
3761 records associated with the domain it pointed at, Exim crashed.
3763 35. If a DNS black list lookup returned more than one A record, Exim ignored
3764 all but the first. It now scans all returned addresses if a particular IP
3765 value is being sought. In this situation, the contents of the
3766 $dnslist_value variable are a list of all the addresses, separated by a
3769 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3770 to accept a host name and all its aliases if the forward lookup for any of
3771 them yielded the IP address of the incoming connection. Now it accepts only
3772 those names whose forward lookup yields the correct IP address. Any other
3773 names are discarded. This closes a loophole whereby a rogue DNS
3774 administrator could create reverse DNS records to break through a
3775 wildcarded host restriction in an ACL.
3777 37. If a user filter or a system filter that ran in a subprocess used any of
3778 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3779 the wrong values were passed to the pipe command ($thisaddress had the
3780 value of $0, $0 had the value of $1, etc). This bug was introduced by
3781 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3783 38. Improved the line breaking for long SMTP error messages from ACLs.
3784 Previously, if there was no break point between 40 and 75 characters, Exim
3785 left the rest of the message alone. Two changes have been made: (a) I've
3786 reduced the minimum length to 35 characters; (b) if it can't find a break
3787 point between 35 and 75 characters, it looks ahead and uses the first one
3788 that it finds. This may give the occasional overlong line, but at least the
3789 remaining text gets split now.
3791 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3792 file descriptors might be low, and that setting 1000 would always raise it.
3793 It turns out that in some environments, the limit is already over 1000 and
3794 that lowering it causes trouble. So now Exim takes care not to decrease it.
3796 40. When delivering a message, the value of $return_path is set to $sender_
3797 address at the start of routing (routers may change the value). By an
3798 oversight, this default was not being set up when an address was tested by
3799 -bt or -bv, which affected the outcome if any router or filter referred to
3802 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3803 log only when "message" or "log_message" are set. However, if one of the
3804 conditions was an address verification, or a call to a nested ACL, the
3805 messages generated by the underlying test were being passed through. This
3806 no longer happens. The underlying message is available in $acl_verify_
3807 message for both "message" and "log_message" expansions, so it can be
3808 passed through if needed.
3810 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3811 new expansion $bh_ to give the encoded byte string without charset
3812 translation. Translation happens only if iconv() is available; HAVE_ICONV
3813 indicates this at build time. HEADERS_CHARSET gives the charset to
3814 translate to; headers_charset can change it in the configuration, and
3815 "headers charset" can change it in an individual filter file.
3817 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3818 that creates RFC 2047 encoded "words" labels them as that charset instead
3819 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3820 expansion operator; (ii) when Exim creates a From: line for a local
3821 message; (iii) when a header line is rewritten to include a "phrase" part.
3823 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3824 buggy, causing it to skip the first lines of messages whose message ID
3825 ended in 'D'. This would not have bitten before Exim release 4.14, because
3826 message IDs were unlikely to end in 'D' before then. The effect was to have
3827 incorrect size information for certain domains.
3829 45. #include "config.h" was missing at the start of the crypt16.c module. This
3830 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3833 46. If there was a timeout during a "random" callout check, Exim treated it as
3834 a failure of the random address, and carried on sending RSET and the real
3835 address. If the delay was just some slowness somewhere, the response to the
3836 original RCPT would be taken as a response to RSET and so on, causing
3837 mayhem of various kinds.
3839 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3840 when I implemented it. It didn't allow for the fact that some option values
3841 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3842 the right test for positive values.
3844 48. Domain names in DNS records are case-independent. Exim always looks them up
3845 in lower case. Some resolvers return domain names in exactly the case they
3846 appear in the zone file, that is, they may contain uppercase letters. Not
3847 all resolvers do this - some return always lower case. Exim was treating a
3848 change of case by a resolver as a change of domain, similar to a widening
3849 of a domain abbreviation. This triggered its re-routing code and so it was
3850 trying to route what was effectively the same domain again. This normally
3851 caused routing to fail (because the router wouldn't handle the domain
3852 twice). Now Exim checks for this case specially, and just changes the
3853 casing of the domain that it ultimately uses when it transmits the message
3856 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3859 50. If a filter generated a file delivery with a non-absolute name (possible if
3860 no home directory exists for the router), the forbid_file option was not
3863 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3864 the existing equality matching.
3866 52. Exim was using ints instead of ino_t variables in some places where it was
3867 dealing with inode numbers.
3869 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3870 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3871 called TMPDIR, and if it finds it is different, it changes its value.
3873 54. The smtp_printf() function is now made available to local_scan() so
3874 additional output lines can be written before returning. There is also an
3875 smtp_fflush() function to enable the detection of a dropped connection.
3876 The variables smtp_input and smtp_batched_input are exported to
3879 55. Changed the default runtime configuration: the message "Unknown user"
3880 has been removed from the ACL, and instead placed on the localuser router,
3881 using the cannot_route_message feature. This means that any verification
3882 failures that generate their own messages won't get overridden. Similarly,
3883 the "Unrouteable address" message that was in the ACL for unverifiable
3884 relay addresses has also been removed.
3886 56. Added hosts_avoid_esmtp to the smtp transport.
3888 57. The exicyclog script was not checking for the esoteric option
3889 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3890 will work only if exicyclog is run under the appropriate euid.
3892 58. Following a discussion on the list, the rules by which Exim recognises line
3893 endings on incoming messages have been changed. The -dropcr and drop_cr
3894 options are now no-ops, retained only for backwards compatibility. The
3895 following line terminators are recognized: LF CRLF CR. However, special
3896 processing applies to CR:
3898 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3899 nor a local message in the state where . is a terminator.
3901 (ii) If a bare CR is encountered in a header line, an extra space is added
3902 after the line terminator so as not to end the header. The reasoning
3903 behind this is that bare CRs in header lines are most likely either
3904 to be mistakes, or people trying to play silly games.
3906 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3907 was being incorrectly given as 18 bytes larger than it should have been.
3908 This is a VOB (very old bug).
3910 60. This may never have affected anything current, but just in case it has:
3911 When the local host is found other than at the start of a list of hosts,
3912 the local host, those with the same MX, and any that follow, are discarded.
3913 When the list in question was part of a longer list of hosts, the following
3914 hosts (not currently being processed) were also being discarded. This no
3915 longer happens. I'm not sure if this situation could ever has previously
3918 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3921 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3922 header. This is something that is recommended in a new Internet Draft, and
3923 is something that is documented as being done by Sendmail. There are two
3924 possible values. For messages generated by the autoreply transport, Exim
3927 Auto-Submitted: auto-replied
3929 whereas for all other generated messages (e.g. bounces) it adds
3931 Auto-Submitted: auto-generated
3933 63. The "personal" condition in filters now includes a test for the
3934 Auto-Submitted: header. If it contains the string "auto-" the message it
3935 not considered personal.
3937 64. Added rcpt_include_affixes as a generic transport option.
3939 65. Added queue_only_override (default true).
3941 66. Added the syslog_duplication option.
3943 67. If what should have been the first header line of a message consisted of
3944 a space followed by a colon, Exim was mis-interpreting it as a header line.
3945 It isn't of course - it is syntactically invalid and should therefore be
3946 treated as the start of the message body. The misbehaviour could have
3947 caused a number of strange effects, including loss of data in subsequent
3948 header lines, and spool format errors.
3950 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3951 client host had authenticated. This control can now be exercised by an ACL
3952 for more flexibility.
3954 69. By default, callouts do not happen when testing with -bh. There is now a
3955 variant, -bhc, which does actually run the callout code, including
3956 consulting and updating the callout cache.
3958 70. Added support for saslauthd authentication, courtesy of Alexander
3961 71. If statvfs() failed on the spool or log directories while checking their
3962 size for availability, Exim confusingly gave the error "space shortage".
3963 Furthermore, in debugging mode it crashed with a floating point exception.
3964 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3965 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3966 serious problem, Exim now writes to the main and panic logs when this
3967 happens, with details of the failure. It then refuses to accept the
3968 incoming message, giving the message "spool directory problem" or "log
3969 directory problem" with a 421 code for SMTP messages.
3971 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3972 0, 1, and 2 exist, because some OS complain for execs without them (see
3973 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3974 descriptors. However, the code omitted to check that the open succeeded,
3975 causing mysterious errors if for some reason the permissions on /dev/null
3976 got screwed. Now Exim writes a message to the main and panic logs, and
3977 bombs out if it can't open /dev/null.
3979 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3980 interact so that it is all more flexible. It is supposed to remain
3981 backwards compatible. Also added extra_local_interfaces.
3983 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3984 to bomb out with an assertion failure - to the client this appears as a
3985 connection drop. This problem occurs in the part of the code that was taken
3986 from the Samba project. Fortunately, the assertion is in a very simple
3987 function, so I have fixed this by reproducing the function inline in the
3988 one place where it is called, and arranging for authentication to fail
3989 instead of killing the process with assert().
3991 75. The SPA client code was not working when the server requested OEM rather
3992 than Unicode encoding.
3994 76. Added code to make require_files with a specific uid setting more usable in
3995 the case where statting the file as root fails - usually a non-root-mounted
3996 NFS file system. When this happens and the failure is EACCES, Exim now
3997 forks a subprocess and does the per-uid checking as the relevant uid.
3999 77. Added process_log_path.
4001 78. If log_file_path was not explicitly set, a setting of check_log_space or
4002 check_log_inodes was ignored.
4004 79. If a space check for the spool or log partitions fails, the incident is now
4005 logged. Of course, in the latter case the data may get lost...
4007 80. Added the %p formatting code to string_format() so that it can be used to
4008 print addresses in debug_print(). Adjusted all the address printing in the
4009 debugging in store.c to use %p rather than %d.
4011 81. There was a concern that a line of code in smtp_in.c could overflow a
4012 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4013 initially expressed, the concern was not well-founded, because trailing
4014 spaces are removed early. However, if the trailing spaces were followed by
4015 a NULL, they did not get removed, so the overflow was possible. Two fixes
4018 (a) I re-wrote the offending code in a cleaner fashion.
4019 (b) If an incoming SMTP command contains a NULL character, it is rejected
4022 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4023 runs initgroups(), so that if the Exim user is in any additional groups,
4024 they will be used during message reception.
4030 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob