1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.386 2006/08/21 11:31:43 fanf2 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TF/01 In the add_headers option to the mail command in an Exim filter,
10 there was a bug that Exim would claim a syntax error in any
11 header after the first one which had an odd number of characters
18 SC/01 Use a glob alias rather than an array ref in eximstats generated
19 parser. This improves both readability and performance.
21 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
22 Don't display local sender or destination tables in eximstats unless
23 there is data to show.
24 Added average volumes into the eximstats top table text output.
26 SC/03 Collect data on the number of addresses (recipients) as well
27 as the number of messages in eximstats.
29 TF/01 Correct an error in the documentation for the redirect router. Exim
30 does (usually) call initgroups() when daemonizing.
32 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
33 with consistent privilege compared to when running as a daemon.
35 TF/03 Note in the spec that $authenticated_id is not set for local
36 submissions from trusted users.
38 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
39 Thanks to Dean Brooks <dean@iglou.com> for the patch.
41 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
42 by adding some example configuration directives to the default
43 configuration file. A little bit of work is required to uncomment the
44 directives and define how usernames and passwords are checked, but
45 there is now a framework to start from.
47 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
48 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
49 without this. I don't know how relevant this is to other LDAP libraries.
51 PH/02 Add the verb name to the "unknown ACL verb" error.
53 PH/03 Magnus Holmgren's patch for filter_prepend_home.
55 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
57 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
58 directory not expanded when it should be if an expanded home directory
59 was set for the address (which is overridden by the transport).
61 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
64 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
65 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
66 because it is too late at that time, and has no effect.
68 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
69 security issue with \' (bugzilla #107). I could not use the
70 PQescapeStringConn() function, because it needs a PGconn value as one of
73 PH/08 When testing addresses using -bt, indicate those final addresses that
74 are duplicates that would not cause an additional delivery. At least one
75 person was confused, thinking that -bt output corresponded to deliveries.
76 (Suppressing duplicates isn't a good idea as you lose the information
77 about possibly different redirections that led to the duplicates.)
79 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
80 systems where poll() doesn't work, in particular OS X.
82 PH/10 Added more information to debugging output for retry time not reached.
84 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
85 operations in malware.c.
87 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
90 PH/13 If write_rejectlog was set false when logging was sent to syslog with
91 syslog_duplication set false, log lines that would normally be written
92 both the the main log and to the reject log were not written to syslog at
95 PH/14 In the default configuration, change the use of "message" in ACL warn
96 statements to "add_header".
98 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
99 not followed by a command (e.g. "seen endif").
101 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
102 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
105 PH/17 Added extra conditions to the default value of delay_warning_condition
109 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
110 { match{$h_precedence:}{(?i)bulk|list|junk} } \
111 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
114 The Auto-Submitted: and various List- headers are standardised, whereas I
115 don't think Precedence: ever was.
117 PH/18 Refactored debugging code in route_finduser() to show more information,
118 in particular, the error code if getpwnam() issues one.
120 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
121 This is apparently needed in addition to the PH/07 change above to avoid
122 any possible encoding problems.
124 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
125 but not after initializing Perl.
127 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
128 output them only if debugging. By default they are written stderr,
129 apparently, which is not desirable.
131 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
134 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
137 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
139 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
140 authenticated or an ident call has been made. Suppress the default
141 values for $authenticated_id and $authenticated_sender (but permit -oMai
142 and -oMas) when testing with -bh.
144 PH/24 Re-jigged the order of the tests in the default configuration so that the
145 tests for valid domains and recipients precede the DNS black list and CSA
146 tests, on the grounds that those ones are more expensive.
148 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
149 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
150 This bug exists in every version of Exim that I still have, right back to
153 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
154 However, an attempt to turn on case-sensitivity in a regex key by
155 including (?-i) didn't work because the subject string was already
156 lowercased, and the effects were non-intuitive. It turns out that a
157 one-line patch can be used to allow (?-i) to work as expected.
163 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
164 other effects) broke the use of negated acl sub-conditions.
166 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
169 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
170 "Deny" causes Exim to reject the incoming connection with a 554 error.
171 Unfortunately, if there is a major crisis, such as a disk failure,
172 tcp-wrappers gives "deny", whereas what one would like would be some
173 kind of temporary error. A kludge has been added to help with this.
174 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
175 554 error is used if errno is still zero or contains ENOENT (which occurs
176 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
179 PH/03 Add -lutil to the default FreeBSD LIBS setting.
181 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
182 errors. Otherwise a message that provokes a temporary error (when other
183 messages do not) can cause a whole host to time out.
185 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
186 addresses were routed directly to files or pipes from a redirect router.
187 File deliveries just didn't batch; pipe deliveries might have suffered
190 PH/06 A failure to get a lock for a hints database would erroneously always say
191 "Failed to get write lock", even when it was really a read lock.
193 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
194 of 0600. This has been changed to use the value of the lockfile_mode
195 option (which defaults to 0600).
197 PH/08 Applied small patch from the Sieve maintainer.
199 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
200 folder from quota calculations, a direct delivery into this folder messed
201 up the contents of the maildirsize file. This was because the regex was
202 used only to exclude .Trash (or whatever) when the size of the mailbox
203 was calculated. There was no check that a delivery was happening into an
204 excluded directory. This bug has been fixed by ignoring all quota
205 processing for deliveries into excluded directories.
207 PH/10 Added the maildirfolder_create_regex option to appendfile.
213 PH/01 The code for finding all the local interface addresses on a FreeBSD
214 system running IPv6 was broken. This may well have applied to all BSD
215 systems, as well as to others that have similar system calls. The broken
216 code found IPv4 interfaces correctly, but gave incorrect values for the
217 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
218 that it would not match correctly against @[] and not recognize the IPv6
221 PH/02 The ipliteral router was not recognizing addresses of the form user@
222 [ipv6:....] because it didn't know about the "ipv6:" prefix.
224 PH/03 Added disable_ipv6.
226 PH/04 Changed $reply_address to use the raw form of the headers instead of the
227 decoded form, because it is most often used to construct To: headers
228 lines in autoreplies, and the decoded form may well be syntactically
229 invalid. However, $reply_address has leading white space removed, and all
230 newlines turned into spaces so that the autoreply transport does not
233 PH/05 If group was specified without a user on a router, and no group or user
234 was specified on a transport, the group from the router was ignored.
236 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
237 for visible compile-time settings that can be used to change these
238 numbers, for those that want even more. Backwards compatibility with old
239 spool files has been maintained. However, going back to a previous Exim
240 release will lost any variables that are in spool files.
242 PH/07 Two small changes when running in the test harness: increase delay when
243 passing a TCP/IP connection to a new process, in case the original
244 process has to generate a bounce, and remove special handling of
245 127.0.0.2 (sic), which is no longer necessary.
247 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
248 be the same on different OS.
250 PH/09 Moved a debug statement in filter processing to avoid a race problem when
253 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
254 whether --show-vars was specified or not
256 JJ/02 exipick: Added support for new ACL variable spool format introduced
259 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
260 syntactically invalid From: or Reply-to: line, and a filter used this to
261 generate an autoreply, and therefore failed to obtain an address for the
262 autoreply, Exim could try to deliver to a non-existent relative file
263 name, causing unrelated and misleading errors. What now happens is that
264 it logs this as a hard delivery error, but does not attempt to create a
267 PH/11 The exinext utility has a -C option for testing purposes, but although
268 the given file was scanned by exinext itself; it wasn't being passed on
269 when Exim was called.
271 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
272 an end-of-file indication when reading a command response.
274 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
275 compiled. In many other places in Exim, IPv6 addresses are always
276 recognized, so I have changed this. It also means that IPv4 domain
277 literals of the form [IPV4:n.n.n.n] are now always recognized.
279 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
280 used if the router is not running as root, for example, when verifying at
281 ACL time, or when using -bh. The debugging output from this situation was
282 non-existent - all you got was a failure to exec. I have made two
285 (a) Failures to set uid/gid, the current directory, or a process leader
286 in a subprocess such as that created by queryprogram now generate
287 suitable debugging ouput when -d is set.
289 (b) The queryprogram router detects when it is not running as root,
290 outputs suitable debugging information if -d is set, and then runs
291 the subprocess without attempting to change uid/gid.
293 PH/15 Minor change to Makefile for building test_host (undocumented testing
296 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
297 additional section of a DNS packet that returns MX or SRV records.
298 Instead, it always explicitly searches for A/AAAA records. This avoids
299 major problems that occur when a DNS server includes only records of one
300 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
301 fixed another bug: if SRV records were looked up and the corresponding
302 address records were *not* found in the additional section, the port
303 values from the SRV records were lost.
305 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
306 using the correct key (the original address) when searching the retry
307 rules in order to find which one to use for generating the retry hint.
309 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
310 adding the default one. Similarly, if it contains a Reply-To: header, the
311 errors_reply_to option, if set, is not used.
313 PH/19 When calculating a retry time, Exim used to measure the "time since
314 failure" by looking at the "first failed" field in the retry record. Now
315 it does not use this if it is later than than the arrival time of the
316 message. Instead it uses the arrival time. This makes for better
317 behaviour in cases where some deliveries succeed, thus re-setting the
318 "first failed" field. An example is a quota failure for a huge message
319 when small messages continue to be delivered. Without this change, the
320 "time since failure" will always be short, possible causing more frequent
321 delivery attempts for the huge message than are intended.
322 [Note: This change was subsequently modified - see PH/04 for 4.62.]
324 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
325 $1, $2, $3) because the numerical variables can be reset during some
326 expansion items (e.g. "match"), thereby losing the authentication data.
328 PH/21 Make -bV show the size of off_t variables so that the test suite can
329 decide whether to run tests for quotas > 2G.
331 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
332 mailbox_size, and mailbox_filecount in the appendfile transport. If a
333 filecount value is greater than 2G or if a quota value is greater than 2G
334 on a system where the size of off_t is not greater than 4, a panic error
337 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
338 never match. The debug and -bh output now contains an explicit error
339 message indicating a malformed IPv4 address or mask.
341 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
342 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
345 PH/25 Do not write to syslog when running in the test harness. The only
346 occasion when this arises is a failure to open the main or panic logs
347 (for which there is an explicit test).
349 PH/26 Added the /no_tell option to "control=freeze".
351 PH/27 If a host name lookup failed very early in a connection, for example, if
352 the IP address matched host_lookup and the reverse lookup yielded a name
353 that did not have a forward lookup, an error message of the form "no IP
354 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
355 could be logged. Now it outputs the IP address instead of "NULL".
357 PH/28 An enabling patch from MH: add new function child_open_exim2() which
358 allows the sender and the authenticated sender to be set when
359 submitting a message from within Exim. Since child_open_exim() is
360 documented for local_scan(), the new function should be too.
362 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
363 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
364 results in an empty string is now treated as unset.
366 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
368 PH/31 Added sender_verify_fail logging option.
370 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
371 needed by RFC 822 but not by RFC 2822 was commented out. I have now
372 tidied the source and removed it altogether.
374 PH/33 When a queue run was abandoned because the load average was too high, a
375 log line was always written; now it is written only if the queue_run log
376 selector is set. In addition, the log line for abandonment now contains
377 information about the queue run such as the pid. This is always present
378 in "start" and "stop" lines but was omitted from the "abandon" line.
380 PH/34 Omit spaces between a header name and the colon in the error message that
381 is given when verify = headers_syntax fails (if there are lots of them,
382 the message gets confusing).
384 PH/35 Change the default for dns_check_names_pattern to allow slashes within
385 names, as there are now some PTR records that contain slashes. This check
386 is only to protect against broken name servers that fall over on strange
387 characters, so the fact that it applies to all lookups doesn't matter.
389 PH/36 Now that the new test suite is complete, we can remove some of the
390 special code in Exim that was needed for the old test suite. For example,
391 sorting DNS records because real resolvers return them in an arbitrary
392 order. The new test suite's fake resolver always returns records in the
395 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
396 bounces) except when queue_only is set, to avoid logging races between
397 the different processes.
399 PH/38 Panic-die if .include specifies a non-absolute path.
401 PH/39 A tweak to the "H" retry rule from its user.
403 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
404 a label. They prevented compilation on older perls.
406 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
407 a warning to be raised on newish perls.
409 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
410 on queue. Changes to match documented behaviour of showing count of
411 messages matching specified criteria.
413 PH/40 Changed the default ident timeout from 30s to 5s.
415 PH/41 Added support for the use of login_cap features, on those BSD systems
416 that have them, for controlling the resources used by pipe deliveries.
418 PH/42 The content-scanning code uses fopen() to create files in which to put
419 message data. Previously it was not paying any attention to the mode of
420 the files. Exim runs with umask(0) because the rest of the code creates
421 files with open(), and sets the required mode explicitly. Thus, these
422 files were ending up world-writeable. This was not a big issue, because,
423 being within the spool directory, they were not world-accessible. I have
424 created a function called modefopen, which takes an additional mode
425 argument. It sets umask(777), creates the file, chmods it to the required
426 mode, then resets the umask. All the relevant calls to fopen() in the
427 content scanning code have been changed to use this function.
429 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
430 to 24 hours. This avoids potential overflow problems when processing G
431 and H retry rules. I suspect nobody ever tinkers with this value.
433 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
435 PH/45 When the plaintext authenticator is running as a client, the server's
436 challenges are checked to ensure they are valid base64 strings. By
437 default, the authentication attempt is cancelled if an invalid string is
438 received. Setting client_ignore_invalid_base64 true ignores these errors.
439 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
440 they are received. Thus, the responses can be made to depend on the
441 challenges. If an invalid string is ignored, an empty string is placed in
444 PH/46 Messages that are created by the autoreply transport now contains a
445 References: header, in accordance with RFCs 2822 and 3834.
447 PH/47 Added authenticated_sender_force to the smtp transport.
449 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
451 PH/49 Installed latest patch from the Sieve maintainer.
453 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
454 was also set, the appendfile transport was unnecessarily scanning a
455 directory of message files (e.g. for maildir delivery) to find the count
456 of files (along with the size), even though it did not need this
457 information. It now does the scan only if it needs to find either the
458 size of the count of files.
460 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
462 PH/52 Two bugs concerned with error handling when the smtp transport is
465 (i) Exim was not creating retry information for temporary errors given
466 for individual recipients after the DATA command when the smtp transport
467 was used in LMTP mode. This meant that they could be retried too
468 frequently, and not timed out correctly.
470 (ii) Exim was setting the flag that allows error details to be returned
471 for LMTP errors on RCPT commands, but not for LMTP errors for individual
472 recipients that were returned after the DATA command.
474 PH/53 This is related to PH/52, but is more general: for any failing address,
475 when detailed error information was permitted to be returned to the
476 sender, but the error was temporary, then after the final timeout, only
477 "retry timeout exceeded" was returned. Now it returns the full error as
478 well as "retry timeout exceeded".
480 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
481 do this, and (what is worse) MTAs that accept it.
483 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
484 will now be deprecated.
486 PH/56 New os.c-cygwin from the Cygwin maintainer.
488 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
489 formats (previously only available in exim formats via -bpr, -bpru,
490 and -bpra. Now also available in native and exiqgrep formats)
492 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
493 with very large, slow to parse queues
495 JJ/08 exipick: added ! as generic prefix to negate any criteria format
497 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
499 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
500 responses to authentication challenges, though it was showing the
501 challenges; (ii) I've removed the CR characters from the debug output for
504 PH/58 Allow for the insertion of a newline as well as a space when a string
505 is turned into more than one encoded-word during RFC 2047 encoding. The
506 Sieve code now uses this.
508 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
509 data_4xx, lost_connection, tls_required.
511 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
512 message was being sent as an SMTP response.
514 PH/61 Add -l and -k options to exicyclog.
516 PH/62 When verifying, if an address was redirected to one new address, so that
517 verification continued, and the new address failed or deferred after
518 having set something in $address_data, the value of $address_data was not
519 passed back to the ACL. This was different to the case when no
520 redirection occurred. The value is now passed back in both cases.
522 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
523 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
524 use login_cap.h, so on its own it isn't the distinguishing feature. The
525 new name refers directly to the setclassresources() function.
527 PH/65 Added configuration files for NetBSD3.
529 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
531 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
532 is preferred over IPv4.
534 PH/68 The bounce_return_message and bounce_return_body options were not being
535 honoured for bounces generated during the reception of non-SMTP messages.
536 In particular, this applied to messages rejected by the ACL. This bug has
537 been fixed. However, if bounce_return_message is true and bounce_return_
538 body is false, the headers that are returned for a non-SMTP message
539 include only those that have been read before the error was detected.
540 (In the case of an ACL rejection, they have all been read.)
542 PH/69 The HTML version of the specification is now built in a directory called
543 spec_html instead of spec.html, because the latter looks like a path with
544 a MIME-type, and this confuses some software.
546 PH/70 Catch two compiler warnings in sieve.c.
548 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
549 function verify_get_ident() calls ip_connect() to connect a socket, but
550 if the "connect()" function timed out, ip_connect() used to close the
551 socket. However, verify_get_ident() also closes the socket later, and in
552 between Exim writes to the log, which may get opened at this point. When
553 the socket was closed in ip_connect(), the log could get the same file
554 descriptor number as the socket. This naturally causes chaos. The fix is
555 not to close the socket in ip_connect(); the socket should be closed by
556 the function that creates it. There was only one place in the code where
557 this was missing, in the iplookup router, which I don't think anybody now
558 uses, but I've fixed it anyway.
560 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
561 well as to direct DNS lookups. Otherwise the handling of names in host
562 lists is inconsistent and therefore confusing.
568 PH/01 Two changes to the default runtime configuration:
570 (1) Move the checks for relay_from_hosts and authenticated clients from
571 after to before the (commented out) DNS black list checks.
573 (2) Add control=submission to the relay_from_hosts and authenticated
574 clients checks, on the grounds that messages accepted by these
575 statements are most likely to be submissions.
577 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
579 (1) Generate an error if the third argument for the ${prvs expansion is
582 (2) Treat a missing third argument of ${prvscheck as if it were an empty
585 (3) Reset the variables that are obtained from the first argument of
586 ${prvscheck and used in the second argument before leaving the code,
587 because their memory is reclaimed, so using them afterwards may do
590 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
591 one (it's much easier than Tom thought :-).
593 (5) Because of (4), we can now allow for the use of $prvscheck_result
594 inside the third argument.
596 PH/03 For some reason, the default setting of PATH when running a command from
597 a pipe transport was just "/usr/bin". I have changed it to
600 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
601 anything to be listed in the output from -bV.
603 PH/05 When a filter generated an autoreply, the entire To: header line was
604 quoted in the delivery log line, like this:
606 => >A.N.Other <ano@some.domain> <original@ddress> ...
608 This has been changed so that it extracts the operative address. There
609 may be more than one such address. If so, they are comma-separated, like
612 => >ano@some.domain,ona@other.domain <original@ddress> ...
614 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
615 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
616 not being looked up in the rDNS to get a host name, Exim was showing the
617 IP address twice in Received: lines, even though the IP addresses were
618 identical. For example:
620 Received: from [1.2.3.4] (helo=[1.2.3.4])
622 However, if the real host name was known, it was omitting the HELO data
623 if it matched the actual IP address. This has been tidied up so that it
624 doesn't show the same IP address twice.
626 PH/07 When both +timestamp and +memory debugging was on, the value given by
627 $tod_xxx expansions could be wrong, because the tod_stamp() function was
628 called by the debug printing, thereby overwriting the timestamp buffer.
629 Debugging no longer uses the tod_stamp() function when +timestamp is set.
631 PH/08 When the original message was included in an autoreply transport, it
632 always said "this is a copy of the message, including all the headers",
633 even if body_only or headers_only was set. It now gives an appropriate
636 PH/09 Applied a patch from the Sieve maintainer which:
638 o fixes some comments
639 o adds the (disabled) notify extension core
640 o adds some debug output for the result of if/elsif tests
641 o points to the current vacation draft in the documentation
642 and documents the missing references header update
646 o fixes a bug in processing the envelope test (when testing
647 multiple envelope elements, the last element determinted the
650 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
651 Electronic Mail") by including:
653 Auto-submitted: auto-generated
655 in the messages that it generates (bounce messages and others, such as
656 warnings). In the case of bounce messages for non-SMTP mesages, there was
657 also a typo: it was using "Auto_submitted" (underscore instead of
658 hyphen). Since every message generated by Exim is necessarily in response
659 to another message, thes have all been changed to:
661 Auto-Submitted: auto-replied
663 in accordance with these statements in the RFC:
665 The auto-replied keyword:
667 - SHOULD be used on messages sent in direct response to another
668 message by an automatic process,
670 - MUST NOT be used on manually-generated messages,
672 - MAY be used on Delivery Status Notifications (DSNs) and Message
673 Disposition Notifications (MDNs),
675 - MUST NOT be used on messages generated by automatic or periodic
676 processes, except for messages which are automatic responses to
679 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
680 to the default Received: header definition.
682 PH/12 Added log selector acl_warn_skipped (default on).
684 PH/13 After a successful wildlsearch lookup, discard the values of numeric
685 variables because (a) they are in the wrong storage pool and (b) even if
686 they were copied, it wouldn't work properly because of the caching.
688 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
689 checking when decoding. Apparently there are clients that generate
690 overlong encoded strings. Why am I not surprised?
692 PH/15 If the first argument of "${if match_address" was not empty, but did not
693 contain an "@" character, Exim crashed. Now it writes a panic log message
694 and treats the condition as false.
696 PH/16 In autoreply, treat an empty string for "once" the same as unset.
698 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
699 extension "envelope-auth". The code is finished and in agreement with
700 other implementations, but there is no documentation so far and in fact,
701 nobody wrote the draft yet. This extension is currently #undef'ed, thus
702 not changing the active code.
704 Print executed "if" and "elsif" statements when debugging is used. This
705 helps a great deal to understand what a filter does.
707 Document more things not specified clearly in RFC3028. I had all this
708 sorted out, when out of a sudden new issues came to my mind. Oops."
710 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
713 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
714 canonical form (as documented). However, after a host name lookup from
715 the IP address, check_host() was doing a simple string comparison with
716 addresses acquired from the DNS when checking that the found name did
717 have the original IP as one of its addresses. Since any found IPv6
718 addresses are likely to be in abbreviated form, the comparison could
719 fail. Luckily, there already exists a function for doing the comparison
720 by converting both addresses to binary, so now that is used instead of
723 PH/20 There was another similar case to PH/19, when a complete host name was
724 given in a host list; looking up its IP address could give an abbreviated
725 form, whereas the current host's name might or might not be abbreviated.
726 The same fix has been applied.
732 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
733 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
736 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
737 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
739 PH/03 Typo: missing ".o" in src/pcre/Makefile.
741 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
742 header line, restrict the check to what is listed in RFCs 2369 and 2929.
743 Also, for "Auto-Submitted", treat anything other than "no" as
744 non-personal, in accordance with RFC 3834. (Previously it treated
745 anything starting "auto-" as non-personal.)
747 TF/01 The control=submission/name=... option had a problem with syntax
748 errors if the name included a slash character. The /name= option
749 now slurps the rest of the string, so it can include any characters
750 but it must come last in the list of options (after /sender_retain
753 PH/05 Some modifications to the interface to the fake nameserver for the new
761 TK/01 Added the "success_on_redirect" address verification option. See
762 NewStuff for rationale and an example.
764 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
766 PH/02 Patch to exigrep to allow it to work on syslog lines.
768 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
769 fread() to skip over the body file's header line, because in Cygwin the
770 header line is locked and is inaccessible.
772 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
773 co-exist for some time) to make it clear that it is the Exim ID that is
774 referenced, not the Message-ID: header line.
776 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
777 string_format() function, because snprintf() does not exist on all
780 PH/06 The use of forbid_filter_existstest now also locks out the use of the
781 ${stat: expansion item.
783 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
784 protocol synchronization error", to keep the pedants happy.
786 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
787 well as for IRIX systems, when gcc is being used. See the host.c source
790 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
792 PH/10 Named domain lists were not working if used in a queue_smtp_domains
795 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
796 transport and to the smtp transport in LMTP mode.
798 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
800 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
801 run a filter in a subprocess. This could lead to confusion in subsequent
802 lookups in the parent process. There should also be a search_tidyup() at
803 the end of the subprocess.
805 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
806 only if the host matched helo_try_verify_hosts, which caused the
807 verification to occur when the EHLO/HELO command was issued. The ACL just
808 tested the remembered result. Now, if a previous verification attempt has
809 not happened, "verify = helo" does it there and then.
811 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
813 TK/03 Fix log output including CR from clamd.
815 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
816 exist provoked a memory error which could cause a segfault.
818 PH/15 Installed PCRE 6.2
820 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
822 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
823 of the problem. Specifically, suggested +O2 rather than +O1 for the
826 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
828 PH/20 If a delivery was routed to a non-standard port by means of an SRV
829 record, the port was not correctly logged when the outgoing_port log
830 selector was set (it logged the transort's default port).
832 PH/21 Added support for host-specific ports to manualroute, queryprogram,
833 fallback_hosts, and "hosts" in the smtp transport.
835 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
836 host errors such as "Connection refused".
838 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
839 authentication with radiusclient 0.4.9:
841 - Error returned from rc_read_config was caught wrongly
842 - Username/password not passed on to radius server due to wrong length.
844 The presumption is that some radiusclient API changes for 4.51/PH/17
845 were not taken care of correctly. The code is still untested by me (my
846 Linux distribution still has 0.3.2 of radiusclient), but it was
847 contributed by a Radius user.
849 PH/24 When doing a callout, the value of $domain wasn't set correctly when
850 expanding the "port" option of the smtp transport.
852 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
853 while reading a MIME header. Thanks to Tom Hughes for a patch.
855 PH/24 Include config.h inside local_scan.h so that configuration settings are
858 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
859 that in an ACL for RCPT (for example), you can examine exactly what was
862 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
863 commands, but it was not correctly comparing the address with the actual
864 client host address. Thus, it would show the EHLO address in Received:
865 header lines when this was not necessary.
867 PH/27 Added the % operator to ${eval:}.
869 PH/28 Exim tries to create and chdir to its spool directory when it starts;
870 it should be ignoring failures (because with -C, for example, it has lost
871 privilege). It wasn't ignoring creation failures other than "already
874 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
877 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
878 because an input line was too long, either on its own, or by virtue of
879 too many continuations, the temporary file was not being removed, and the
880 return code was incorrect.
882 PH/31 Missing "BOOL" in function definition in filtertest.c.
884 PH/32 Applied Sieve patches from the maintainer.
886 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
888 PH/33 Added "verify = not_blind".
890 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
891 Local/Makefile (with some defaults set). These are used in built scripts
892 such as exicyclog, but they have never been used in the exim_install
893 script (though there are many overriding facilities there). I have
894 arranged that the exim_install script now takes note of these two
897 PH/35 Installed configuration files for Dragonfly.
899 PH/36 When a locally submitted message by a trusted user did not contain a
900 From: header, and the sender address was obtained from -f or from an SMTP
901 MAIL command, and the trusted user did not use -F to supply a sender
902 name, $originator_name was incorrectly used when constructing a From:
903 header. Furthermore, $originator_name was used for submission mode
904 messages from external hosts without From: headers in a similar way,
905 which is clearly wrong.
907 PH/37 Added control=suppress_local_fixups.
909 PH/38 When log_selector = +received_sender was set, and the addition of the
910 sender made the log line's construction buffer exactly full, or one byte
911 less than full, an overflow happened when the terminating "\n" was
914 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
915 when the result of a list match is failure because a DNS lookup failed.
917 PH/40 RM_COMMAND is now used in the building process.
919 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
920 the "build-* directories that it finds.
922 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
923 address in a domain literal was a prefix of an interface address.
925 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
926 when verifying a sender address, unless rewrite_headers is false.
928 PH/44 Wrote a long comment about why errors_to addresses are verified as
929 recipients, not senders.
931 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
932 the ratelimit ACL was added.
934 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
936 PH/46 Added extra information about PostgreSQL errors to the error string.
938 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
939 avoiding the need to install special zones in a real server. This is
940 backwards compatible; if it can't find the fake resolver, it drops back.
941 Thus, both old and new test suites can be run.
943 TF/02 Added util/ratelimit.pl
945 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
946 clock is set back in time.
948 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
949 Candler <B.Candler@pobox.com>.
951 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
952 OK for addresses that are the result of redirections.
954 PH/48 A number of further additions for the benefit of the new test suite,
955 including a fake gethostbyname() that interfaces to the fake DNS resolver
958 TF/06 The fix for widen_domains has also been applied to qualify_single and
959 search_parents which are the other dnslookup options that can cause
962 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
965 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
967 TF/07 Exim produced the error message "an SRV record indicated no SMTP
968 service" if it encountered an MX record with an empty target hostname.
969 The message is now "an MX or SRV record indicated no SMTP service".
971 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
972 if the DNS of the sending site is misconfigured. This is quite a
973 common situation. This change restores the behaviour of treating a
974 helo verification defer as a failure.
976 PH/51 If self=fail was set on a router, the bounce message did not include the
977 actual error message.
983 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
985 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
986 command itself ended in error, the underlying message about the transport
987 filter timeout was being overwritten with the pipe command error. Now the
988 underlying error message should be appended to the second error message.
990 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
992 PH/02 Reduce the amount of output that "make" produces by default. Full output
993 can still be requested.
995 PH/03 The warning log line about a condition test deferring for a "warn" verb
996 was being output only once per connection, rather than after each
997 occurrence (because it was using the same function as for successful
998 "warn" verbs). This seems wrong, so I have changed it.
1000 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1001 it should not have, which might have caused a crash in the right
1002 circumstances, but probably never did.
1004 PH/04 Installed a modified version of Tony Finch's patch to make submission
1005 mode fix the return path as well as the Sender: header line, and to
1006 add a /name= option so that you can make the user's friendly name appear
1009 TF/03 Added the control = fakedefer ACL modifier.
1011 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1012 Mark Lowes for thorough testing.
1014 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1016 TK/03 Merged latest SRS patch from Miles Wilton.
1018 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1019 with the definition in sysexits.h (which is #included earlier).
1020 Fortunately, Exim does not actually use EX_OK. The code used to try to
1021 preserve the sysexits.h value, by assumimg that macro definitions were
1022 scanned for macro replacements. I have been disabused of this notion,
1023 so now the code just undefines EX_OK before #including unistd.h.
1025 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1026 in the smtp transport. When a block could not be written in a single
1027 write() function, the timeout was being re-applied to each part-write.
1028 This seems wrong - if the receiver was accepting one byte at a time it
1029 would take for ever. The timeout is now adjusted when this happens. It
1030 doesn't have to be particularly precise.
1032 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1033 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1035 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1036 without a domain if the check to <postmaster@domain> fails.
1038 SC/01 Eximstats: added -xls and the ability to specify output files
1039 (patch written by Frank Heydlauf).
1041 SC/02 Eximstats: use FileHandles for outputing results.
1043 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1045 SC/04 Eximstats: fixed display of large numbers with -nvr option
1047 SC/05 Eximstats: fixed merging of reports with empty tables.
1049 SC/06 Eximstats: added the -include_original_destination flag
1051 SC/07 Eximstats: removed tabs and trailing whitespace.
1053 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1055 TK/06 MBOX spool code: Add real "From " MBOX separator line
1056 so the .eml file is really in mbox format (even though
1057 most programs do not really care). Patch from Alex Miller.
1059 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1060 The latter is generated from $received_to and is only set if the
1061 message has one envelope recipient. SA can use these headers,
1062 obviously out-of-the-box. Patch from Alex Miller.
1064 PH/08 The ${def test on a variable was returning false if the variable's
1065 value was "0", contrary to what the specification has always said!
1066 The result should be true unless the variable is empty.
1068 PH/09 The syntax error of a character other than { following "${if
1069 def:variable_name" (after optional whitespace) was not being diagnosed.
1070 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1071 accidental colon was present, for example, could give incorrect results.
1073 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1074 result is used (not including appendfile, where other changes are about
1077 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1078 This involved changing a lot of size variables from int to off_t. It
1079 should work with maildirs and everything.
1081 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1082 spamd dying while we are connected to it.
1084 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1087 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1088 function for BDB 4.3.
1090 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1092 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1093 the sources for PCRE have been re-arranged and more files are now
1096 PH/15 The code I had for printing potentially long long variables in PH/11
1097 above was not the best (it lost precision). The length of off_t variables
1098 is now inspected at build time, and an appropriate printing format (%ld
1099 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1100 to be "long long int" or "long int". This is needed for the internal
1101 formatting function string_vformat().
1103 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1104 the configuration file to be ":syslog", then the script "guesses" where
1105 the logs files are, rather than using the compiled in default. In our
1106 case the guess is not the same as the compiled default, so the script
1107 suddenly stopped working when I started to use syslog. The patch checks
1108 to see if log_file_path is "". If so, it attempts to read it from exim
1109 with no configuration file to get the compiled in version, before it
1110 falls back to the previous guessing code."
1112 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1113 implementing BATV in an Exim configuration. See NewStuff for the gory
1116 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1117 Makefile that are specific to HP-UX.
1119 PH/18 If the "use_postmaster" option was set for a recipient callout together
1120 with the "random" option, the postmaster address was used as the MAIL
1121 FROM address for the random test, but not for the subsequent recipient
1122 test. It is now used for both.
1124 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1125 patch removes a few documentation additions to RFC 3028, because the
1126 latest draft now contains them. It adds the new en;ascii-case comparator
1127 and a new error check for 8bit text in MIME parts. Comparator and
1128 require names are now matched exactly. I enabled the subaddress
1129 extension, but it is not well tested yet (read: it works for me)."
1131 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1132 rework some of the code of TK/09 above to avoid the hardwired use of
1133 "%lld" and "long long". Replaced the call to snprintf() with a call to
1136 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1137 records point to non-existent hosts", "retry timeout exceeded", and
1138 "retry time not reached for any host after a long failure period".
1140 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1141 experimental DomainKeys support:
1143 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1144 (2) On an error such as an illegally used "control", the wrong name for
1145 the control was given.
1147 These problems did NOT occur unless DomainKeys support was compiled.
1149 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1151 PH/24 Added ${if match_ip condition.
1153 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1154 databases so that it will be absolutely obvious if a crash occurs in the
1155 DB library. This is a regular occurrence (often caused by mis-matched
1158 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1159 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1160 picked up on a user's system that detects such things. There doesn't seem
1161 to be a gcc warning option for this - only an attribute that has to be
1162 put on the function's prototype. It seems that in Fedora Core 4 they have
1163 set this on a number of new functions. No doubt there will be more in due
1166 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1167 specify a transport. However, if an address that was verified by such a
1168 router was the subject of a callout, Exim crashed because it tried to
1169 read the rcpt_include_affixes from the non-existent transport. Now it
1170 just assumes that the setting of that option is false. This bug was
1171 introduced by 4.51/PH/31.
1173 PH/28 Changed -d+all to exclude +memory, because that information is very
1174 rarely of interest, but it makes the output a lot bigger. People tend to
1175 do -d+all out of habit.
1177 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1178 code in os-type was giving problems when libc.so lives in lib64, like on
1181 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1182 aren't the modern standard, and it seems that some systems' include files
1183 don't always have them. Exim was already checking for some of the newer
1184 ones like T_AAAA, and defining it itself. I've added checks for all the
1185 record types that Exim uses.
1187 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1188 not automatically generating a new one, as it is supposed to. This
1189 prevented TLS from working. If the file did exist, but contained invalid
1190 data, a new version was generated, as expected. It was only the case of a
1191 non-existent file that was broken.
1193 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1194 with a change in libdomainkeys > 0.64.
1196 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1197 from DNS. If the selector record carries the flag, it now has
1198 precedence over the domain-wide flag.
1200 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1202 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1203 the use of a port name that isn't defined in /etc/services) occurred, the
1204 message was deferred as in a normal delivery, and thus remained on the
1205 spool, instead of being failed because of the mua_wrapper setting. This
1206 is now fixed, and I tidied up some of the mua_wrapper messages at the
1209 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1210 the messages in a hash of arrays rather than using individual hashes.
1211 This is a bit cleaner and results in dramatic memory savings, albeit
1212 at a slight CPU cost.
1214 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1215 as requested by Marc Sherman.
1217 SC/10 Eximstats: added histograms for user specified patterns as requested
1220 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1222 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1223 fopen() in the content-scanning modules that did not already have it.
1229 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1230 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1232 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1234 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1236 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1237 to test Sieve filters that use "vacation".
1239 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1240 that changes the way the GnuTLS parameters are stored in the cache file.
1241 The new format can be generated externally. For backward compatibility,
1242 if the data in the cache doesn't make sense, Exim assumes it has read an
1243 old-format file, and it generates new data and writes a new file. This
1244 means that you can't go back to an older release without removing the
1247 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1248 work if there are any delivery delays because "one_time" forces the
1249 parent to be marked "delivered", so its unseen clone is never tried
1250 again. For this reason, Exim now forbids the simultaneous setting of
1253 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1254 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1255 entry if you want to know the details. The fix, however, neglected to
1256 consider the case when local delivery batching is involved. The test for
1257 "previously delivered" was not happening when checking to see if an
1258 address could be batched with a previous (undelivered) one; under
1259 certain circumstances this could lead to multiple deliveries to the same
1262 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1263 in its include files, and this causes problems building Exim.
1265 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1266 header_syntax) but Exim was just ignoring anything given after a slash.
1267 In particular, this caused confusion with an attempt to use "verify =
1268 reverse_host_lookup/defer_ok". An error is now given when options are
1269 supplied for verify items that do not have them. (Maybe reverse_host_
1270 lookup should have a defer_ok option, but that's a different point.)
1272 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1273 defined by RFC 821) to 2048, because there were problems with some AUTH
1274 commands, and RFC 1869 says the size should be increased for extended
1275 SMTP commands that take arguments.
1277 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1280 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1281 "unknown" error; now it says that the functionality isn't in the binary.
1283 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1284 an address' error message when a string expansion fails (syntax or
1285 whatever). Otherwise the password may appear in the log. Following change
1286 PH/42 below, there is no longer a chance of it appearing in a bounce
1289 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1291 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1292 of its addresses was ever tried. (Bugzilla bug #2.)
1294 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1295 the result incorrectly in the debug output. (It correctly added a newline
1296 to what was transported.)
1298 TF/01 Added $received_time.
1300 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1301 commented out examples of how to interface to a virus scanner and to
1302 SpamAssassin. Also added commented examples of av_scanner and
1303 spamd_address settings.
1305 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1306 and controls are allowed in which ACLs. There were a couple of minor
1307 errors. Some of the entries in the conditions table (which is a table of
1308 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1309 negation of where the condition IS allowed.
1311 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1313 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1314 header file does not have a version number, so I've had to invent a new
1315 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1316 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1317 radiusclient), but it was contributed by a Radius user.
1319 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1320 files or directories, for OpenSSL.
1322 PH/19 When an Exim process that is running as root has to create an Exim log
1323 file, it does so in a subprocess that runs as exim:exim so as to get the
1324 ownership right at creation (otherwise, other Exim processes might see
1325 the file with the wrong ownership). There was no test for failure of this
1326 fork() call, which would lead to the process getting stuck as it waited
1327 for a non-existent subprocess. Forks do occasionally fail when resources
1328 run out. I reviewed all the other calls to fork(); they all seem to check
1331 PH/20 When checking for unexpected SMTP input at connect time (before writing
1332 the banner), Exim was not dealing correctly with a non-positive return
1333 from the read() function. If the client had disconnected by this time,
1334 the result was a log entry for a synchronization error with an empty
1335 string after "input=" when read() returned zero. If read() returned -1
1336 (an event I could not check), uninitialized data bytes were printed.
1337 There were reports of junk text (parts of files, etc) appearing after
1340 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1342 PH/22 Added support for macro redefinition, and (re)definition in between
1343 driver and ACL definitions.
1345 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1346 forgetting to use the resulting value; it was using the unexpanded value.
1348 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1349 hadn't been configured. The fix is from Juergen Kreileder, who
1350 understands it better than I do:
1352 "Here's what I see happening with three configured cyrus_sasl
1353 authenticators configured (plain, login, cram-md5):
1355 On startup auth_cyrus_sasl_init() gets called for each of these.
1356 This means three calls to sasl_listmech() without a specified mech_list.
1357 => SASL tests which mechs of all available mechs actually work
1358 => three warnings about OTP not working
1359 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1361 With the patch, sasl_listmech() also gets called three times. But now
1362 SASL's mech_list option is set to the server_mech specified in the the
1363 authenticator. Or in other words, the answer from sasl_listmech()
1364 gets limited to just the mech you're testing for (which is different
1366 => the return list contains just 'plain' or 'login', 'cram-md5' or
1367 nothing depending on the value of ob->server_mech.
1369 I've just tested the patch: Authentication still works fine,
1370 unavailable mechs specified in the exim configuration are still
1371 caught, and the auth.log warnings about OTP are gone."
1373 PH/25 When debugging is enabled, the contents of the command line are added
1374 to the debugging output, even when log_selector=+arguments is not
1377 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1378 answer is "GNU", and only if the return is "GNU/something" is the answer
1381 PH/27 $acl_verify_message is now set immediately after the failure of a
1382 verification in an ACL, and so is available in subsequent modifiers. In
1383 particular, the message can be preserved by coding like this:
1385 warn !verify = sender
1386 set acl_m0 = $acl_verify_message
1388 Previously, $acl_verify_message was set only while expanding "message"
1389 and "log_message" when a very denied access.
1391 PH/28 Modified OS/os.c-Linux with
1393 -#ifndef OS_LOAD_AVERAGE
1394 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1396 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1397 nomenclature these days.)
1399 PH/29 Installed patch from the Sieve maintainer that adds the options
1400 sieve_useraddress and sieve_subaddress to the redirect router.
1402 PH/30 In these circumstances:
1403 . Two addresses routed to the same list of hosts;
1404 . First host does not offer TLS;
1405 . First host accepts first address;
1406 . First host gives temporary error to second address;
1407 . Second host offers TLS and a TLS session is established;
1408 . Second host accepts second address.
1409 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1410 and peerdn, if requested) that were in fact used only for the second
1413 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1414 attention to any local part prefix or suffix that was matched by the
1415 router that accepted the address. It now behaves in the same way as it
1416 does for delivery: the affixes are removed from the local part unless
1417 rcpt_include_affixes is set on the transport.
1419 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1420 timeout during the DATA phase of an incoming message.
1422 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1423 applied a patch sanctioned by the Sieve maintainer.
1425 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1426 the uid or gid is negative. A case of a negative gid caused this to be
1427 noticed. The fix allows for either to be negative.
1429 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1430 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1433 PH/36 The change PH/12 above was broken. Fixed it.
1435 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1436 the grounds that routing the same address twice would always produce the
1437 same answer. This might have been true once, but it is certainly no
1438 longer true now. Routing a child address may depend on the previous
1439 routing that produced that child. Some complicated redirection strategies
1440 went wrong when messages had multiple recipients, and made Exim's
1441 behaviour dependent on the order in which the addresses were given.
1443 I have moved the duplicate checking until after the routing is complete.
1444 Exim scans the addresses that are assigned to local and remote
1445 transports, and removes any duplicates. This means that more work will be
1446 done, as duplicates will always all be routed, but duplicates are
1447 presumably rare, so I don't expect this is of any significance.
1449 For deliveries to pipes, files, and autoreplies, the duplicate checking
1450 still happens during the routing process, since they are not going to be
1453 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1454 It corrects a timeout issue with spamd. This is Ian's comment: "The
1455 background is that sometimes spamd either never reads data from a
1456 connection it has accepted, or it never writes response data. The exiscan
1457 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1458 blindly assumes that writes won't block so it may never time out."
1460 PH/39 Allow G after quota size as well as K and M.
1462 PH/40 The value set for $authenticated_id in an authenticator may not contain
1463 binary zeroes or newlines because the value is written to log lines and
1464 to spool files. There was no check on this. Now the value is run through
1465 the string_printing() function so that such characters are converted to
1466 printable escape sequences.
1468 PH/41 $message_linecount is a new variable that contains the total number of
1469 lines in the message. Compare $body_linecount, which is the count for the
1472 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1473 bounce and delay warning messages, except in certain special cases, which
1476 (a) An SMTP error message from a remote host;
1477 (b) A message specified in a :fail: redirection;
1478 (c) A message specified in a "fail" command in a system filter;
1479 (d) A message specified in a FAIL return from the queryprogram router;
1480 (e) A message specified by the cannot_route_message router option.
1482 In these cases only, Exim does include the error details in bounce and
1483 warning messages. There are also a few cases where bland messages such
1484 as "unrouteable address" or "local delivery error" are given.
1486 PH/43 $value is now also set for the "else" part of a ${run expansion.
1488 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1489 being worked on, but at least Exim now implements the latest version to
1492 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1493 process to complete was treated as a delivery failure, a timeout while
1494 writing the message to the pipe was logged, but erroneously treated as a
1495 successful delivery. Such timeouts include transport filter timeouts. For
1496 consistency with the overall process timeout, these timeouts are now
1497 treated as errors, giving rise to delivery failures by default. However,
1498 there is now a new Boolean option for the pipe transport called
1499 timeout_defer, which, if set TRUE, converts the failures into defers for
1500 both kinds of timeout. A transport filter timeout is now identified in
1503 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1504 systems where "make" and "gmake" are different, calling "gmake" at top
1505 level broke things. I've arranged for the value of $(MAKE) to be passed
1506 from the Makefile to this script so that it can call the same version of
1510 A note about Exim versions 4.44 and 4.50
1511 ----------------------------------------
1513 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1514 changes of various kinds. As a consequence, a big documentation update was
1515 needed. This delayed the release for rather longer than seemed good, especially
1516 in the light of a couple of (minor) security issues. Therefore, the changes
1517 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1518 release. So 4.44 and 4.50 are in effect two different branches that both start
1521 I have left the 4.50 change log unchanged; it contains all the changes since
1522 4.43. The change log for 4.44 is below; many of its items are identical to
1523 those for 4.50. This seems to be the most sensible way to preserve the
1524 historical information.
1530 1. Minor wording change to the doc/README.SIEVE file.
1532 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1533 computation of the current number of files was incorrect.
1535 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1536 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1539 4. Give more explanation in the error message when the command for a transport
1540 filter fails to execute.
1542 5. There are several places where Exim runs a non-Exim command in a
1543 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1544 was being done only for the command run by the queryprogram router. It is
1545 now done for all such subprocesses. The other cases are: ${run, transport
1546 filters, and the commands run by the lmtp and pipe transports.
1548 6. Added CONFIGURE_GROUP build-time option.
1550 7. Some older OS have a limit of 256 on the maximum number of file
1551 descriptors. Exim was using setrlimit() to set 1000 as a large value
1552 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1553 systems. I've change it so that if it can't get 1000, it tries for 256.
1555 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1556 was an oversight, and furthermore, ever since the addition of extra
1557 controls (e.g. 4.43/32), the checks on when to allow different forms of
1558 "control" were broken. There should now be diagnostics for all cases when a
1559 control that does not make sense is encountered.
1561 9. Added the /retain_sender option to "control=submission".
1563 10. $recipients is now available in the predata ACL (oversight).
1565 11. Tidy the search cache before the fork to do a delivery from a message
1566 received from the command line. Otherwise the child will trigger a lookup
1567 failure and thereby defer the delivery if it tries to use (for example) a
1568 cached ldap connection that the parent has called unbind on.
1570 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1571 of $address_data from the recipient verification was clobbered by the
1572 sender verification.
1574 13. The value of address_data from a sender verification is now available in
1575 $sender_address_data in subsequent conditions in the ACL statement.
1577 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1579 15. Added a new option "connect=<time>" to callout options, to set a different
1582 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1583 was its contents. (It was OK if the option was not defined at all.)
1585 17. A "Completed" log line is now written for messages that are removed from
1586 the spool by the -Mrm option.
1588 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1589 information about exactly what failed.
1591 19. Added -dd to debug only the daemon process.
1593 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1594 handles timeouts, both on the server side and network timeouts. Renamed the
1595 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1597 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1598 It is now set to "smtps".
1600 22. $host_address is now set to the target address during the checking of
1601 ignore_target_hosts.
1603 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1604 being passed; this would have caused $sender_host_name to have been used if
1605 matching the list had actually called for a host name (not very likely,
1606 since this list is usually IP addresses). A host name is now passed as
1609 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1610 code that specifies a non-restarting handler (typically sigaction() in
1611 modern systems) in an attempt to fix a rare and obscure crash bug.
1613 25. Narrowed the window for a race in the daemon that could cause it to ignore
1614 SIGCHLD signals. This is not a major problem, because they are used only to
1615 wake it up if nothing else does.
1617 26. A malformed maildirsize file could cause Exim to calculate negative values
1618 for the mailbox size or file count. Odd effects could occur as a result.
1619 The maildirsize information is now recalculated if the size or filecount
1622 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1623 support for a long time. Removed HAVE_SYS_VFS_H.
1625 28. Installed the latest version of exipick from John Jetmore.
1627 29. In an address list, if the pattern was not a regular expression, an empty
1628 subject address (from a bounce message) matched only if the pattern was an
1629 empty string. Non-empty patterns were not even tested. This was the wrong
1630 because it is perfectly reasonable to use an empty address as part of a
1631 database query. An empty address is now tested by patterns that are
1632 lookups. However, all the other forms of pattern expect the subject to
1633 contain a local part and a domain, and therefore, for them, an empty
1634 address still always fails if the pattern is not itself empty.
1636 30. Exim went into a mad DNS loop when attempting to do a callout where the
1637 host was specified on an smtp transport, and looking it up yielded more
1638 than one IP address.
1640 31. Re-factored the code for checking spool and log partition space into a
1641 function that finds that data and another that does the check. The former
1642 is then used to implement four new variables: $spool_space, $log_space,
1643 $spool_inodes, and $log_inodes.
1645 32. The RFC2047 encoding function was originally intended for short strings
1646 such as real names; it was not keeping to the 75-character limit for
1647 encoded words that the RFC imposes. It now respects the limit, and
1648 generates multiple encoded words if necessary. To be on the safe side, I
1649 have increased the buffer size for the ${rfc2047: expansion operator from
1652 33. It is now permitted to omit both strings after an "if" condition; if the
1653 condition is true, the result is "true". As before, when the second string
1654 is omitted, a false condition yields an empty string. This makes it less
1655 cumbersome to write custom ACL and router conditions.
1657 34. Failure to deliver a bounce message always caused it to be frozen, even if
1658 there was an errors_to setting on the router. The errors_to setting is now
1661 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1662 canonical form (fully expanded) before being placed in
1663 $sender_host_address.
1665 36. The table in the code that translates DNS record types into text (T_A to
1666 "A" for instance) was missing entries for NS and CNAME. It is just possible
1667 that this could have caused confusion if both these types were looked up
1668 for the same domain, because the text type is used as part of Exim's
1669 per-process caching. But the chance of anyone hitting this buglet seems
1672 37. The dnsdb lookup has been extended in a number of ways.
1674 (1) There is a new type, "zns", which walks up the domain tree until it
1675 finds some nameserver records. It should be used with care.
1677 (2) There is a new type, "mxh", which is like "mx" except that it returns
1678 just the host names, not the priorities.
1680 (3) It is now possible to give a list of domains (or IP addresses) to be
1681 looked up. The behaviour when one of the lookups defers can be
1682 controlled by a keyword.
1684 (4) It is now possible to specify the separator character for use when
1685 multiple records are returned.
1687 38. The dnslists ACL condition has been extended: it is now possible to supply
1688 a list of IP addresses and/or domains to be looked up in a particular DNS
1691 39. Added log_selector=+queue_time_overall.
1693 40. When running the queue in the test harness, wait just a tad after forking a
1694 delivery process, to get repeatability of debugging output.
1696 41. Include certificate and key file names in error message when GnuTLS fails
1697 to set them up, because the GnuTLS error message doesn't include the name
1698 of the failing file when there is a problem reading it.
1700 42. Allow both -bf and -bF in the same test run.
1702 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1704 44. The "Exiscan patch" is now merged into the mainline Exim source.
1706 45. Sometimes the final signoff response after QUIT could fail to get
1707 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1708 < 0 before doing a fflush(). This bug looks as though it goes back to the
1709 introduction of TLS in release 3.20, but "sometimes" must have been rare
1710 because the tests only now provoked it.
1712 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1713 (this can affect the format of dates).
1715 47. exim_tidydb, when checking for the continued existence of a message for
1716 which it has found a message-specific retry record, was not finding
1717 messages that were in split spool directories. Consequently, it was
1718 deleting retry records that should have stayed in existence.
1720 48. Steve fixed some bugs in eximstats.
1722 49. The SPA authentication driver was not abandoning authentication and moving
1723 on to the next authenticator when an expansion was forced to fail,
1724 contradicting the general specification for all authenticators. Instead it
1725 was generating a temporary error. It now behaves as specified.
1727 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1728 (the order specifies the preference for clients). The order is now AES256,
1729 AES128, 3DES, ARCFOUR128.
1731 51. Small patch to Sieve code - explicitly set From: when generating an
1734 52. Exim crashed if a remote delivery caused a very long error message to be
1735 recorded - for instance if somebody sent an entire SpamAssassin report back
1736 as a large number of 550 error lines. This bug was coincidentally fixed by
1737 increasing the size of one of Exim's internal buffers (big_buffer) that
1738 happened as part of the Exiscan merge. However, to be on the safe side, I
1739 have made the code more robust (and fixed the comments that describe what
1742 53. Now that there can be additional text after "Completed" in log lines (if
1743 the queue_time_overall log selector is set), a one-byte patch to exigrep
1744 was needed to allow it to recognize "Completed" as not the last thing in
1747 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1748 patch that reportedly fixes this has been added. I am not expert enough to
1749 create a test for it. This is what the patch creator wrote:
1751 "I found a little strange behaviour of ldap code when working with
1752 Windows 2003 AD Domain, where users was placed in more than one
1753 Organization Units. When I tried to give exim partial DN, the exit code
1754 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1755 But simultaneously result of request was absolutely normal ldap result,
1756 so I produce this patch..."
1758 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1759 REFERENCE, so I have modified the code to exclude the patch when that macro
1762 55. Some experimental protocols are using DNS PTR records for new purposes. The
1763 keys for these records are domain names, not reversed IP addresses. The
1764 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1765 leaves it alone. Component reversal etc. now happens only for IP addresses.
1768 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1770 57. Double the size of the debug message buffer (to 2048) so that more of very
1771 long debug lines gets shown.
1773 58. The exicyclog utility now does better if the number of log files to keep
1774 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1776 59. Two changes related to the smtp_active_hostname option:
1778 (1) $smtp_active_hostname is now available as a variable.
1779 (2) The default for smtp_banner uses $smtp_active_hostname instead
1780 of $primary_hostname.
1782 60. The host_aton() function is supposed to be passed a string that is known
1783 to be a valid IP address. However, in the case of IPv6 addresses, it was
1784 not checking this. This is a hostage to fortune. Exim now panics and dies
1785 if the condition is not met. A case was found where this could be provoked
1786 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1787 components; fortuitously, this particular loophole had already been fixed
1788 by change 4.50/55 above.
1790 If there are any other similar loopholes, the new check in host_aton()
1791 itself should stop them being exploited. The report I received stated that
1792 data on the command line could provoke the exploit when Exim was running as
1793 exim, but did not say which command line option was involved. All I could
1794 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1795 running as the user.
1798 61. There was a buffer overflow vulnerability in the SPA authentication code
1799 (which came originally from the Samba project). I have added a test to the
1800 spa_base64_to_bits() function which I hope fixes it.
1803 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1804 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1806 63. The daemon start-up calls getloadavg() while still root for those OS that
1807 need the first call to be done as root, but it missed one case: when
1808 deliver_queue_load_max is set with deliver_drop_privilege. This is
1809 necessary for the benefit of the queue runner, because there is no re-exec
1810 when deliver_drop_privilege is set.
1812 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1813 This has been fixed.
1815 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1816 was in use, was not putting the data itself into the right store pool;
1817 consequently, it could be overwritten for a subsequent message in the same
1818 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1821 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1823 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1824 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1825 the function were treating the return as a boolean value, which happened to
1826 work because 0=false and not-0=true, but is not correct code.
1828 68. The host_aton() function was not handling scoped IPv6 addresses (those
1829 with, for example, "%eth0" on the end) correctly.
1831 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1832 negated items (that is, ~something) in unsigned ints. Some compilers
1833 apparently mutter when there is no cast.
1835 70. If an address verification called from an ACL failed, and did not produce a
1836 user-specific message (i.e. there was only a "system" message), nothing was
1837 put in $acl_verify_message. In this situation, it now puts the system
1840 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1841 session; change 4.31/43 added the unwanted input to the log line - except
1842 that it did not do this in the start of session case. It now does.
1844 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1845 This is wrong and can cause the other end to generate a synchronization
1846 error if it is another Exim or anything else that does the synchronization
1847 check. A QUIT command is no longer sent after a timeout.
1849 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1850 during host lookups.
1852 74. The defer_ok option of callout verification was not working if it was used
1853 when verifying addresses in header lines, that is, for this case:
1855 verify = header_sender/callout=defer_ok
1857 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1858 those file descriptors could be used for SMTP connections. If anything
1859 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1860 could be sent to the SMTP client, causing chaos. The daemon now opens
1861 stdin, stdout, and stderr to /dev/null when it puts itself into the
1864 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1865 log by default. The user can override this with suitable Perl magic.
1867 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1868 the log message when discard triggers, was not working for the DATA ACL or
1869 for the non-SMTP ACL.
1871 78. Error message wording change in sieve.c.
1873 79. If smtp_accept_max_per_host was set, the number of connections could be
1874 restricted to fewer than expected, because the daemon was trying to set up
1875 a new connection before checking whether the processes handling previous
1876 connections had finished. The check for completed processes is now done
1877 earlier. On busy systems, this bug wouldn't be noticed because something
1878 else would have woken the daemon, and it would have reaped the completed
1881 80. If a message was submitted locally by a user whose login name contained one
1882 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1883 It caused a spool format error. I have fixed the spool reading code. A
1884 related problem was that the "from" clause in the Received: line became
1885 illegal because of the space(s). It is now covered by ${quote_local_part.
1887 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1890 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1892 83. Patch from Sieve maintainer to fix unterminated string problem in
1893 "vacation" handling.
1895 84. Some minor changes to the Linux configuration files to help with other
1896 OS variants using glibc.
1898 85. One more patch for Sieve to update vacation handling to latest spec.
1901 ----------------------------------------------------
1902 See the note above about the 4.44 and 4.50 releases.
1903 ----------------------------------------------------
1909 1. Change 4.43/35 introduced a bug that caused file counts to be
1910 incorrectly computed when quota_filecount was set in an appendfile
1913 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1914 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1917 3. Give more explanation in the error message when the command for a transport
1918 filter fails to execute.
1920 4. There are several places where Exim runs a non-Exim command in a
1921 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1922 was being done only for the command run by the queryprogram router. It is
1923 now done for all such subprocesses. The other cases are: ${run, transport
1924 filters, and the commands run by the lmtp and pipe transports.
1926 5. Some older OS have a limit of 256 on the maximum number of file
1927 descriptors. Exim was using setrlimit() to set 1000 as a large value
1928 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1929 systems. I've change it so that if it can't get 1000, it tries for 256.
1931 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1932 was an oversight, and furthermore, ever since the addition of extra
1933 controls (e.g. 4.43/32), the checks on when to allow different forms of
1934 "control" were broken. There should now be diagnostics for all cases when a
1935 control that does not make sense is encountered.
1937 7. $recipients is now available in the predata ACL (oversight).
1939 8. Tidy the search cache before the fork to do a delivery from a message
1940 received from the command line. Otherwise the child will trigger a lookup
1941 failure and thereby defer the delivery if it tries to use (for example) a
1942 cached ldap connection that the parent has called unbind on.
1944 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1945 of $address_data from the recipient verification was clobbered by the
1946 sender verification.
1948 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1949 was its contents. (It was OK if the option was not defined at all.)
1951 11. A "Completed" log line is now written for messages that are removed from
1952 the spool by the -Mrm option.
1954 12. $host_address is now set to the target address during the checking of
1955 ignore_target_hosts.
1957 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1958 being passed; this would have caused $sender_host_name to have been used if
1959 matching the list had actually called for a host name (not very likely,
1960 since this list is usually IP addresses). A host name is now passed as
1963 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1964 code that specifies a non-restarting handler (typically sigaction() in
1965 modern systems) in an attempt to fix a rare and obscure crash bug.
1967 15. Narrowed the window for a race in the daemon that could cause it to ignore
1968 SIGCHLD signals. This is not a major problem, because they are used only to
1969 wake it up if nothing else does.
1971 16. A malformed maildirsize file could cause Exim to calculate negative values
1972 for the mailbox size or file count. Odd effects could occur as a result.
1973 The maildirsize information is now recalculated if the size or filecount
1976 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1977 support for a long time. Removed HAVE_SYS_VFS_H.
1979 18. Updated exipick to current release from John Jetmore.
1981 19. Allow an empty sender to be matched against a lookup in an address list.
1982 Previously the only cases considered were a regular expression, or an
1985 20. Exim went into a mad DNS lookup loop when doing a callout where the
1986 host was specified on the transport, if the DNS lookup yielded more than
1989 21. The RFC2047 encoding function was originally intended for short strings
1990 such as real names; it was not keeping to the 75-character limit for
1991 encoded words that the RFC imposes. It now respects the limit, and
1992 generates multiple encoded words if necessary. To be on the safe side, I
1993 have increased the buffer size for the ${rfc2047: expansion operator from
1996 22. Failure to deliver a bounce message always caused it to be frozen, even if
1997 there was an errors_to setting on the router. The errors_to setting is now
2000 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2001 canonical form (fully expanded) before being placed in
2002 $sender_host_address.
2004 24. Updated eximstats to version 1.33
2006 25. Include certificate and key file names in error message when GnuTLS fails
2007 to set them up, because the GnuTLS error message doesn't include the name
2008 of the failing file when there is a problem reading it.
2010 26. Expand error message when OpenSSL has problems setting up cert/key files.
2013 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2014 (this can affect the format of dates).
2016 28. exim_tidydb, when checking for the continued existence of a message for
2017 which it has found a message-specific retry record, was not finding
2018 messages that were in split spool directories. Consequently, it was
2019 deleting retry records that should have stayed in existence.
2021 29. eximstats updated to version 1.35
2022 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2023 1.35 - bugfix such that pie charts by volume are generated correctly
2025 30. The SPA authentication driver was not abandoning authentication and moving
2026 on to the next authenticator when an expansion was forced to fail,
2027 contradicting the general specification for all authenticators. Instead it
2028 was generating a temporary error. It now behaves as specified.
2030 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2031 (the order specifies the preference for clients). The order is now AES256,
2032 AES128, 3DES, ARCFOUR128.
2034 31. Small patch to Sieve code - explicitly set From: when generating an
2037 32. Exim crashed if a remote delivery caused a very long error message to be
2038 recorded - for instance if somebody sent an entire SpamAssassin report back
2039 as a large number of 550 error lines. This bug was coincidentally fixed by
2040 increasing the size of one of Exim's internal buffers (big_buffer) that
2041 happened as part of the Exiscan merge. However, to be on the safe side, I
2042 have made the code more robust (and fixed the comments that describe what
2045 33. Some experimental protocols are using DNS PTR records for new purposes. The
2046 keys for these records are domain names, not reversed IP addresses. The
2047 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2048 leaves it alone. Component reversal etc. now happens only for IP addresses.
2051 34. The host_aton() function is supposed to be passed a string that is known
2052 to be a valid IP address. However, in the case of IPv6 addresses, it was
2053 not checking this. This is a hostage to fortune. Exim now panics and dies
2054 if the condition is not met. A case was found where this could be provoked
2055 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2056 components; fortuitously, this particular loophole had already been fixed
2057 by change 4.50/55 or 4.44/33 above.
2059 If there are any other similar loopholes, the new check in host_aton()
2060 itself should stop them being exploited. The report I received stated that
2061 data on the command line could provoke the exploit when Exim was running as
2062 exim, but did not say which command line option was involved. All I could
2063 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2064 running as the user.
2067 35. There was a buffer overflow vulnerability in the SPA authentication code
2068 (which came originally from the Samba project). I have added a test to the
2069 spa_base64_to_bits() function which I hope fixes it.
2072 36. The daemon start-up calls getloadavg() while still root for those OS that
2073 need the first call to be done as root, but it missed one case: when
2074 deliver_queue_load_max is set with deliver_drop_privilege. This is
2075 necessary for the benefit of the queue runner, because there is no re-exec
2076 when deliver_drop_privilege is set.
2078 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2079 was in use, was not putting the data itself into the right store pool;
2080 consequently, it could be overwritten for a subsequent message in the same
2081 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2084 38. Sometimes the final signoff response after QUIT could fail to get
2085 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2086 < 0 before doing a fflush(). This bug looks as though it goes back to the
2087 introduction of TLS in release 3.20, but "sometimes" must have been rare
2088 because the tests only now provoked it.
2094 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2095 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2096 Now it returns an integer. A number of calls were still expecting a T/F
2097 return. Fortuitously, in all cases, the tests worked in OK situations,
2098 which is the norm. However, things would have gone wrong on any write
2099 failures on the smtp file descriptor. This function is used when sending
2100 messages over SMTP and also when doing verify callouts.
2102 2. When Exim is called to do synchronous delivery of a locally submitted
2103 message (the -odf or -odi options), it no longer closes stderr before doing
2106 3. Implemented the mua_wrapper option.
2108 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2110 5. Implemented the functions header_remove(), header_testname(),
2111 header_add_at_position(), and receive_remove_recipient(), and exported them
2114 6. If an ACL "warn" statement specified the addition of headers, Exim already
2115 inserted X-ACL-Warn: at the start if there was no header name. However, it
2116 was not making this test for the second and subsequent header lines if
2117 there were newlines in the string. This meant that an invalid header could
2118 be inserted if Exim was badly configured.
2120 7. Allow an ACL "warn" statement to add header lines at the start or after all
2121 the Received: headers, as well as at the end.
2123 8. Added the rcpt_4xx retry error code.
2125 9. Added postmaster_mailfrom=xxx to callout verification option.
2127 10. Added mailfrom=xxxx to the callout verification option, for verify=
2130 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2131 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2133 12. Inserted some casts to stop certain compilers warning when using pointer
2134 differences as field lengths or precisions in printf-type calls (mostly
2135 affecting debugging statements).
2137 13. Added optional readline() support for -be (dynamically loaded).
2139 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2140 same clock tick as a message's arrival, so that its received time was the
2141 same as the "first fail" time on the retry record, and that message
2142 remained on the queue past the ultimate address timeout, every queue runner
2143 would try a delivery (because it was past the ultimate address timeout) but
2144 after another failure, the ultimate address timeout, which should have then
2145 bounced the address, did not kick in. This was a "< instead of <=" error;
2146 in most cases the first failure would have been in the next clock tick
2147 after the received time, and all would be well.
2149 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2150 being recognized when the domain list was tested by the match_domain
2151 condition in an expansion string.
2153 16. Added the ${str2b64: operator.
2155 17. Exim was always calling setrlimit() to set a large limit for the number of
2156 processes, without checking whether the existing limit was already
2157 adequate. (It did check for the limit on file descriptors.) Furthermore,
2158 errors from getrlimit() and setrlimit() were being ignored. Now they are
2159 logged to the main and panic logs, but Exim does carry on, to try to do its
2160 job under whatever limits there are.
2162 18. Imported PCRE 5.0.
2164 19. Trivial typo in log message " temporarily refused connection" (the leading
2167 20. If the log selector return_path_on_delivery was set and an address was
2168 redirected to /dev/null, the delivery process crashed because it assumed
2169 that a return path would always be set for a "successful" delivery. In this
2170 case, the whole delivery is bypassed as an optimization, and therefore no
2173 21. Internal re-arrangement: the function for sending a challenge and reading
2174 a response while authentication was assuming a zero-terminated challenge
2175 string. It's now changed to take a pointer and a length, to allow for
2176 binary data in such strings.
2178 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2180 23. Exim was not respecting finduser_retries when seeking the login of the
2181 uid under which it was called; it was always trying 10 times. (The default
2182 setting of finduser_retries is zero.) Also, it was sleeping after the final
2183 failure, which is pointless.
2185 24. Implemented tls_on_connect_ports.
2187 25. Implemented acl_smtp_predata.
2189 26. If the domain in control=submission is set empty, Exim assumes that the
2190 authenticated id is a complete email address when it generates From: or
2191 Sender: header lines.
2193 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2194 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2195 chown and chgrp in /bin and hostname in /usr/bin.
2197 28. Exim was keeping the "process log" file open after each use, just as it
2198 does for the main log. This opens the possibility of it remaining open for
2199 long periods when the USR1 signal hits a daemon. Occasional processlog
2200 errors were reported, that could have been caused by this. Anyway, it seems
2201 much more sensible not to leave this file open at all, so that is what now
2204 29. The long-running daemon process does not normally write to the log once it
2205 has entered its main loop, and it closes the log before doing so. This is
2206 so that log files can straightforwardly be renamed and moved. However,
2207 there are a couple of unusual error situations where the daemon does write
2208 log entries, and I had neglected to close the log afterwards.
2210 30. The text of an SMTP error response that was received during a remote
2211 delivery was being truncated at 512 bytes. This is too short for some of
2212 the long messages that one sometimes sees. I've increased the limit to
2215 31. It is now possible to make retry rules that apply only when a message has a
2216 specific sender, in particular, an empty sender.
2218 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2219 it possible to be selective about when SMTP synchronization is enforced.
2221 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2223 32. Implemented hosts_connection_nolog.
2225 33. Added an ACL for QUIT.
2227 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2230 35. Added mailbox_size and mailbox_filecount to appendfile.
2232 36. Added control = no_multiline_responses to ACLs.
2234 37. There was a bug in the logic of the code that waits for the clock to tick
2235 in the case where the clock went backwards by a substantial amount such
2236 that the microsecond fraction of "now" was more than the microsecond
2237 fraction of "then" (but the whole seconds number was less).
2239 38. Added support for the libradius Radius client library this is found on
2240 FreeBSD (previously only the radiusclient library was supported).
2246 1. When certain lookups returned multiple values in the form name=value, the
2247 quoting of the values was not always being done properly. Specifically:
2248 (a) If the value started with a double quote, but contained no whitespace,
2250 (b) If the value contained whitespace other than a space character (i.e.
2251 tabs or newlines or carriage returns) it was not quoted.
2252 This fix has been applied to the mysql and pgsql lookups by writing a
2253 separate quoting function and calling it from the lookup code. The fix
2254 should probably also be applied to nisplus, ibase and oracle lookups, but
2255 since I cannot test any of those, I have not disturbed their existing code.
2257 2. A hit in the callout cache for a specific address caused a log line with no
2258 reason for rejecting RCPT. Now it says "Previous (cached) callout
2259 verification failure".
2261 3. There was an off-by-one bug in the queryprogram router. An over-long
2262 return line was truncated at 256 instead of 255 characters, thereby
2263 overflowing its buffer with the terminating zero. As well as fixing this, I
2264 have increased the buffer size to 1024 (and made a note to document this).
2266 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2267 when Exim is waiting for an SMTP response from a remote server, Exim
2268 restarts its select() call on the socket, thereby resetting its timeout.
2269 This is not a problem when such interrupts are rare. Somebody set up a cron
2270 job to run exiwhat every 2 minutes, which is less than the normal select()
2271 timeout (5 or 10 minutes). This meant that the select() timeout never
2272 kicked in because it was always reset. I have fixed this by comparing the
2273 time when an interrupt arrives with the time at the start of the first call
2274 to select(). If more time than the timeout has elapsed, the interrupt is
2275 treated as a timeout.
2277 5. Some internal re-factoring in preparation for the addition of Sieve
2278 extensions (by MH). In particular, the "personal" test is moved to a
2279 separate function, and given an option for scanning Cc: and Bcc: (which is
2280 not set for Exim filters).
2282 6. When Exim created an email address using the login of the caller as the
2283 local part (e.g. when creating a From: or Sender: header line), it was not
2284 quoting the local part when it contained special characters such as @.
2286 7. Installed new OpenBSD configuration files.
2288 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2289 try to make them clearer.
2291 9. Callout options, other than the timeout value, were being ignored when
2292 verifying sender addresses in header lines. For example, when using
2294 verify = header_sender/callout=no_cache
2296 the cache was (incorrectly) being used.
2298 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2299 only the Cygwin environment.
2301 11. When return_path_on_delivery was set as a log selector, if different remote
2302 addresses in the same message used different return paths and parallel
2303 remote delivery occurred, the wrong values would sometimes be logged.
2304 (Whenever a remote delivery process finished, the return path value from
2305 the most recently started remote delivery process was logged.)
2307 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2308 lines when AUTH and/or TLS are in use. This is the "received protocol"
2309 field. Exim used to use "asmtp" for authenticated SMTP, without any
2310 indication (in the protocol name) for TLS use. Now it follows the RFC and
2311 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2312 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2313 names appear in log lines as well as in Received: header lines.
2315 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2316 extensions, and comparison tests, and to fix some bugs.
2318 14. Changes to the "personal" filter test:
2320 (1) The test was buggy in that it was just doing the equivalent of
2321 "contains" tests on header lines. For example, if a user's address was
2322 anne@some.where, the "personal" test would incorrectly be true for
2324 To: susanne@some.where
2326 This test is now done by extracting each address from the header in turn,
2327 and checking the entire address. Other tests that are part of "personal"
2328 are now done using regular expressions (for example, to check local parts
2329 of addresses in From: header lines).
2331 (2) The list of non-personal local parts in From: addresses has been
2332 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2333 taken from the Sieve specification recommendations.
2335 (3) If the message contains any header line starting with "List-" it is
2336 treated as non-personal.
2338 (4) The test for "circular" in the Subject: header line has been removed
2339 because it now seems ill-conceived.
2341 15. Minor typos in src/EDITME comments corrected.
2343 16. Installed latest exipick from John Jetmore.
2345 17. If headers_add on a router specified a text string that was too long for
2346 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2347 of string_sprintf() is now avoided.
2349 18. $message_body_size was not set (it was always zero) when running the DATA
2350 ACL and the local_scan() function.
2352 19. For the "mail" command in an Exim filter, no default was being set for
2353 the once_repeat time, causing a random time value to be used if "once" was
2354 specified. (If the value happened to be <= 0, no repeat happened.) The
2355 default is now 0s, meaning "never repeat". The "vacation" command was OK
2356 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2357 (I found it when inspecting the code).
2359 20. There is now an overall timeout for performing a callout verification. It
2360 defaults to 4 times the callout timeout, which applies to individual SMTP
2361 commands during the callout. The overall timeout applies when there is more
2362 than one host that can be tried. The timeout is checked before trying the
2363 next host. This prevents very long delays if there are a large number of
2364 hosts and all are timing out (e.g. when the network connections are timing
2365 out). The value of the overall timeout can be changed by specifying an
2366 additional sub-option for "callout", called "maxwait". For example:
2368 verify = sender/callout=5s,maxwait=20s
2370 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2371 to the end before writing, but this should make it even safer).
2373 22. Exim was forgetting that it had advertised PIPELINING for the second and
2374 subsequent messages on an SMTP connection. It was also not resetting its
2375 memory on STARTTLS and an internal HELO.
2377 23. When Exim logs an SMTP synchronization error within a session, it now
2378 records whether PIPELINING has been advertised or not.
2380 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2381 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2382 rather than long int.
2384 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2386 26. Added the never_mail option to autoreply.
2392 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2393 crash if the getsockname() call failed; this can happen if a connection is
2394 closed very soon after it is established. The problem was simply in the
2395 order in which certain operations were done, causing Exim to try to write
2396 to the SMTP stream before it had set up the file descriptor. The bug has
2397 been fixed by making things happen in the correct order.
2403 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2404 before the connection was closed, thus losing the rejection response.
2406 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2407 some early Solaris releases, but causes trouble in current releases where
2408 socklen_t is defined.
2410 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2413 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2416 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2417 that releasing the top of it at the end releases what was used for sub-
2418 expansions (unless the block got too big). However, discard this block if
2419 the first thing is a variable or header, so that we can use its block when
2420 it is dynamic (useful for very large $message_headers, for example).
2422 6. Lookups now cache *every* query, not just the most recent. A new, separate
2423 store pool is used for this. It can be recovered when all lookup caches are
2424 flushed. Lookups now release memory at the end of their result strings.
2425 This has involved some general refactoring of the lookup sources.
2427 7. Some code has been added to the store_xxx() functions to reduce the amount
2428 of flapping under certain conditions.
2430 8. log_incoming_interface used to affect only the <= reception log lines. Now
2431 it causes the local interface and port to be added to several more SMTP log
2432 lines, for example "SMTP connection from", and rejection lines.
2434 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2436 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2438 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2439 could be overwritten at the end of the current message (or the start of a
2440 new message if it was set in a HELO ACL). The value is now preserved for
2441 the duration of the SMTP connection.
2443 12. If a transport had a headers_rewrite setting, and a matching header line
2444 contained an unqualified address, that address was qualified, even if it
2445 did not match any rewriting rules. The underlying bug was that the values
2446 of the flags that permit the existence of unqualified sender and recipient
2447 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2448 non-local messages, and by -bnq for local messages) were not being
2449 preserved with the message after it was received.
2451 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2452 "next input=" as part of the text comprising the host identity instead of
2453 the correct text. The code was using the same buffer for two different
2454 strings. However, depending on which order the printing function evaluated
2455 its arguments, the bug did not always show up. Under Linux, for example, my
2456 test suite worked just fine.
2458 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2459 doesn't work with some older versions of Perl. It has been changed to "my",
2460 which in any case is probably the better facility to use.
2462 15. A really picky compiler found some instances of statements for creating
2463 error messages that either had too many or two few arguments for the format
2466 16. The size of the buffer for calls to the DNS resolver has been increased
2467 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2468 for addresses that have a lot of PTR records. This alleviates a problem; it
2469 does not fully solve it.
2471 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2472 buffer now truncates the list and logs the incident, which is the same
2473 action as happens when Exim is looking up a host name and its aliases.
2474 Previously in this situation something unpredictable would happen;
2475 sometimes it was "internal error: store_reset failed".
2477 18. If a server dropped the connection unexpectedly when an Exim client was
2478 using GnuTLS and trying to read a response, the client delivery process
2479 crashed while trying to generate an error log message.
2481 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2482 string, for example:
2484 warn message = H1: something\nH2: something
2486 the text was added as a single header line from Exim's point of view
2487 though it ended up OK in the delivered message. However, searching for the
2488 second and subsequent header lines using $h_h2: did not work. This has been
2489 fixed. Similarly, if a system filter added multiple headers in this way,
2490 the routers could not see them.
2492 20. Expanded the error message when iplsearch is called with an invalid key to
2493 suggest using net-iplsearch in a host list.
2495 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2496 ACLs are no longer actually imposed (and a message to that effect is
2499 22. If a "gecos" field in a passwd entry contained escaped characters, in
2500 particular, if it contained a \" sequence, Exim got it wrong when building
2501 a From: or a Sender: header from that name. A second bug also caused
2502 incorrect handling when an unquoted " was present following a character
2503 that needed quoting.
2505 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2506 was not being matched caselessly.
2508 24. Arranged for all hyphens in the exim.8 source to be escaped with
2511 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2512 properly. Recipient callout cache records were still being keyed to include
2513 the sender, even when use_sender was set false. This led to far more
2514 callouts that were necessary. The sender is no longer included in the key
2515 when use_sender is false.
2517 26. Added "control = submission" modifier to ACLs.
2519 27. Added the ${base62d: operator to decode base 62 numbers.
2521 28. dnsdb lookups can now access SRV records.
2523 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2524 the configuration file.
2526 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2527 (-v) mode. This makes the output for a verbose queue run more intelligible.
2529 31. Added a use_postmaster feature to recipient callouts.
2531 32. Added the $body_zerocount variable, containing the number of binary zero
2532 bytes in the message body.
2534 33. The time of last modification of the "new" subdirectory is now used as the
2535 "mailbox time last read" when there is a quota error for a maildir
2538 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2540 35. Added +ignore_unknown as a special item in host lists.
2542 36. Code for decoding IPv6 addresses in host lists is now included, even if
2543 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2544 address was recognized as an IP address, but was then not correctly decoded
2545 into binary, causing unexpected and incorrect effects when compared with
2552 1. Very minor rewording of debugging text in manualroute to say "list of
2553 hosts" instead of "hostlist".
2555 2. If verify=header_syntax was set, and a header line with an unqualified
2556 address (no domain) and a large number of spaces between the end of the
2557 name and the colon was received, the reception process suffered a buffer
2558 overflow, and (when I tested it) crashed. This was caused by some obsolete
2559 code that should have been removed. The fix is to remove it!
2561 3. When running in the test harness, delay a bit after writing a bounce
2562 message to get a bit more predictability in the log output.
2564 4. Added a call to search_tidyup() just before forking a reception process. In
2565 theory, someone could use a lookup in the expansion of smtp_accept_max_
2566 per_host which, without the tidyup, could leave open a database connection.
2568 5. Added the variables $recipient_data and $sender_data which get set from a
2569 lookup success in an ACL "recipients" or "senders" condition, or a router
2570 "senders" option, similar to $domain_data and $local_part_data.
2572 6. Moved the writing of debug_print from before to after the "senders" test
2575 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2576 problems for message scanning, either using a data ACL, or using
2577 local_scan() because the Received: header was not generated till after they
2578 were called (in order to set the time as the time of reception completion).
2579 I have revised the way this works. The header is now generated after the
2580 body is received, but before the ACL or local_scan() are called. After they
2581 are run, the timestamp in the header is updated.
2587 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2588 before starting a queue runner without re-exec. This happened only when
2589 deliver_drop_privilege was set or when the Exim user was set to root. The
2590 effect of the bug was that timeouts during subsequent deliveries caused
2591 crashes instead of being properly handled. The handler is now left at its
2592 default (and expected) setting.
2594 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2595 message, again when deliver_drop_privilege is set or Exim is run as root.
2596 The bug described in (1) was not present in this case, but the tidying up
2597 of the other signals was missing. I have made the two cases consistent.
2599 3. The ignore_target_hosts setting on a manualroute router was being ignored
2600 for hosts that were looked up using the /MX notation.
2602 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2605 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2606 operated on the sender address. After changing the $sender_address to <>
2607 for the sender address verify, Exim was re-instated it as the original
2608 (before rewriting) address, but remembering that it had rewritten it, so it
2609 wasn't rewriting it again. This bug also had the effect of breaking the
2610 sender address verification caching when the sender address was rewritten.
2612 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2613 This has been changed so that if the ip literal address matches
2614 ignore_target_hosts, the router declines.
2616 7. Added expansion conditions match_domain, match_address, and match_local_
2617 part (NOT match_host).
2619 8. The placeholder for the Received: header didn't have a length field set.
2621 9. Added code to Exim itself and to exim_lock to test for a specific race
2622 condition that could lead to file corruption when using MBX delivery. The
2623 issue is with the lockfile that is created in /tmp. If this file is removed
2624 after a process has opened it but before that process has acquired a lock,
2625 there is the potential for a second process to recreate the file and also
2626 acquire a lock. This could lead to two Exim processes writing to the file
2627 at the same time. The added code performs the same test as UW imapd; it
2628 checks after acquiring the lock that its file descriptor still refers to
2629 the same named file.
2631 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2632 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2635 11. Added the smtp_active_hostname option. If used, this will typically be made
2636 to depend on the incoming interface address. Because $interface_address is
2637 not set up until the daemon has forked a reception process, error responses
2638 that can happen earlier (such as "too many connections") no longer contain
2641 12. If an expansion in a condition on a "warn" statement fails because a lookup
2642 defers, the "warn" statement is abandoned, and the next ACL statement is
2643 processed. Previously this caused the whole ACL to be aborted.
2645 13. Added the iplsearch lookup type.
2647 14. Added ident_timeout as a log selector.
2649 15. Added tls_certificate_verified as a log selector.
2651 16. Added a global option tls_require_ciphers (compare the smtp transport
2652 option of the same name). This controls incoming TLS connections.
2654 17. I finally figured out how to make tls_require_ciphers do a similar thing
2655 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2656 before starting the TLS session.
2658 18. Tabs are now shown as \t in -bP output.
2660 19. If the log selector return_path_on_delivery was set, Exim crashed when
2661 bouncing a message because it had too many Received: header lines.
2663 20. If two routers both had headers_remove settings, and the first one included
2664 a superfluous trailing colon, the final name in the first list and the
2665 first name in the second list were incorrectly joined into one item (with a
2666 colon in the middle).
2672 1. Added -C and -D options to the exinext utility, mainly to make it easier
2673 to include in the automated testing, but these could be helpful when
2674 multiple configurations are in use.
2676 2. The exinext utility was not formatting the output nicely when there was
2677 an alternate port involved in the retry record key, nor when there was a
2678 message id as well (for retries that were specific to a specific message
2679 and a specific host). It was also confused by IPv6 addresses, because of
2680 the additional colons they contain. I have fixed the IPv4 problem, and
2681 patched it up to do a reasonable job for IPv6.
2683 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2684 delivery, the log line now contains "pipelined" if PIPELINING was used.
2686 4. An SMTP transport process used to panic and die if the bind() call to set
2687 an explicit outgoing interface failed. This has been changed; it is now
2688 treated in the same way as a connect() failure.
2690 5. A reference to $sender_host_name in the part of a conditional expansion
2691 that was being skipped was still causing a DNS lookup. This no longer
2694 6. The def: expansion condition was not recognizing references to header lines
2695 that used bh_ and bheader_.
2697 7. Added the _cache feature to named lists.
2699 8. The code for checking quota_filecount in the appendfile transport was
2700 allowing one more file than it should have been.
2702 9. For compatibility with Sendmail, the command line option
2710 and sets the incoming protocol and host name (for trusted callers). The
2711 host name and its colon can be omitted when only the protocol is to be set.
2712 Note the Exim already has two private options, -pd and -ps, that refer to
2713 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2714 "s", but I don't think that's a major issue.
2716 10. A number of refactoring changes to the code, none of which should affect
2719 (a) The number of logging options was getting close to filling up the
2720 32-bit word that was used as a bit map. I have split them into two classes:
2721 those that are passed in the argument to log_write(), and those that are
2722 only ever tested independently outside of that function. These are now in
2723 separate 32-bit words, so there is plenty of room for expansion again.
2724 There is no change in the user interface or the logging behaviour.
2726 (b) When building, for example, log lines, the code previously used a
2727 macro that called string_cat() twice, in order to add two strings. This is
2728 not really sufficiently general. Furthermore, there was one instance where
2729 it was actually wrong because one of the argument was used twice, and in
2730 one call a function was used. (As it happened, calling the function twice
2731 did not affect the overall behaviour.) The macro has been replaced by a
2732 function that can join an arbitrary number of extra strings onto a growing
2735 (c) The code for expansion conditions now uses a table and a binary chop
2736 instead of a serial search (which was left over from when there were very
2737 few conditions). Also, it now recognizes conditions like "pam" even when
2738 the relevant support is not compiled in: a suitably worded error message is
2739 given if an attempt is made to use such a condition.
2741 11. Added ${time_interval:xxxxx}.
2743 12. A bug was causing one of the ddress fields not to be passed back correctly
2744 from remote delivery subprocesses. The field in question was not being
2745 subsequently used, so this caused to problems in practice.
2747 13. Added new log selectors queue_time and deliver_time.
2749 14. Might have fixed a bug in maildirsizefile handling that threw up
2750 "unexpected character" debug warnings, and recalculated the data
2751 unnecessarily. In any case, I expanded the warning message to give more
2754 15. Added the message "Restricted characters in address" to the statements in
2755 the default ACL that block characters like @ and % in local parts.
2757 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2758 Three changes have been made:
2760 (a) There was a serious bug; a negative response to MAIL caused the whole
2761 recipient domain to be cached as invalid, thereby blocking all messages
2762 to all local parts at the same domain, from all senders. This bug has
2763 been fixed. The domain is no longer cached after a negative response to
2764 MAIL if the sender used is not empty.
2766 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2769 (c) A new callout option, "use_sender" has been added for people who want
2770 the modified behaviour.
2776 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2779 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2780 indeed breaks things for older releases.
2782 3. Added additional logging to the case where there is a problem reading data
2783 from a filter that is running in a subprocess using a pipe, in order to
2784 try to track down a specific problem.
2786 4. Testing facility fudge: when running in the test harness and attempting
2787 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2788 getting "No route to host". Convert this to a timeout.
2790 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2793 6. Some OS don't have socklen_t but use size_t instead. This affects the
2794 fifth argument of getsockopt() amongst other things. This is now
2795 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2796 can be set for individual OS. I have set it for SunOS5, OSF1, and
2797 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2798 some earlier ones do not.
2800 7. Change 4.30/15 was not doing the test caselessly.
2802 8. The standard form for an IPv6 address literal was being rejected by address
2803 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2804 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2805 this, as well as the form without the "IPv6" on the front (but only when
2806 address literals are enabled, of course).
2808 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2810 10. Exim crashed if a message with an empty sender address specified by -f
2811 encountered a router with an errors_to setting. This could be provoked only
2812 by a command such as
2816 where an empty string was supplied; "<>" did not hit this bug.
2818 11. Installed PCRE release 4.5.
2820 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2821 remained set. It is now erased.
2823 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2824 times from message ids (which are base 36 rather than the normal 62).
2826 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2827 were being counted as actual protocol errors, and logged if the log
2828 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2829 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2830 and DATA following a set of rejected RCPTs do not count as protocol errors.
2831 In other words, Exim assumes they were pipelined, though this may not
2832 actually be the case. Of course, in all cases the client gets an
2833 appropriate error code.
2835 15. If a lookup fails in an ACL condition, a message about the failure may
2836 be available; it is used if testing the ACL cannot continue, because most
2837 such messages specify what the cause of the deferral is. However, some
2838 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2839 that caused an old message to be retained and used if a later statement
2840 caused a defer, replacing the real cause of the deferral.
2842 16. If an IP address had so many PTR records that the DNS lookup buffer
2843 was not large enough to hold them, Exim could crash while trying to process
2844 the truncated data. It now detects and logs this case.
2846 17. Further to 4.21/58, another change has been made: if (and only if) the
2847 first line of a message (the first header line) ends with CRLF, a bare LF
2848 in a subsequent header line has a space inserted after it, so as not to
2849 terminate the header.
2851 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2852 unnecessarily, used atoi() instead of strtol(), and didn't check the
2853 termination when getting file sizes from file names by regex.
2855 19. Completely re-implemented the support for maildirsize files, in the light
2856 of a number of problems with the previous contributed implementation
2857 (4.30/29). In particular:
2859 . If the quota is zero, the maildirsize file is maintained, but no quota is
2862 . If the maildir directory does not exist, it is created before any attempt
2863 to write a maildirsize file.
2865 . The quota value in the file is just a cache; if the quota is changed in
2866 the transport, the new value overrides.
2868 . A regular expression is available for excluding directories from the
2871 20. The autoreply transport checks the characters in options that define the
2872 message's headers; it allows continued headers, but it was checking with
2873 isspace() after an embedded newline instead of explicitly looking for a
2876 21. If all the "regular" hosts to which an address was routed had passed their
2877 expiry times, and had not reached their retry times, the address was
2878 bounced, even if fallback hosts were defined. Now Exim should go on to try
2881 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2882 equivalent code in the SMTP transport. Some hosts send humungous responses
2883 to HELO/EHLO, more than 1024 it seems.
2885 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2886 gives compiler warnings in some environments. I've now done it "properly",
2889 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2890 (because of problems with the built-in one) was declared to return uschar *
2891 instead of char *, causing compiler failure.
2893 25. Fixed a file descriptor leak when processing alias/forward files.
2895 26. Fixed a minor format string issue in dbfn.c.
2897 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2899 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2900 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2903 29. When a sender address is verified, it is cached, to save repeating the test
2904 when there is more than one recipient in a message. However, when the
2905 verification involves a callout, it is possible for different callout
2906 options to be set for different recipients. It is too complicated to keep
2907 track of this in the cache, so now Exim always runs a verification when a
2908 callout is required, relying on the callout cache for the optimization.
2909 The overhead is duplication of the address routing, but this should not be
2912 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2913 to be verified with callout=postmaster, and the main callout worked but the
2914 postmaster check failed, the verification correctly failed. However, if a
2915 subsequent RCPT command asked for sender verification *without* the
2916 postmaster check, incorrect caching caused this verification also to fail,
2919 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2920 it was not caching the DNS options (qualify_single, search_parents) that
2921 were used when the lookup failed. A subsequent lookup with different
2922 options therefore always gave the same answer, though there were cases
2923 where it should not have. (Example: a "domains = !$mx_any" option on a
2924 dnslookup router: the "domains" option is always processed without any
2925 widening, but the router might have qualify_single set.) Now Exim uses the
2926 cached value only when the same options are set.
2928 32. Added John Jetmore's "exipick" utility to the distribution.
2930 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2931 than a timeout (e.g. a certificate is required, and is not provided), an
2932 Exim server now closes the connection immediately. Previously it waited for
2933 the client to close - but if the client is SSL, it seems that they each
2934 wait for each other, leading to a delay before one of them times out.
2936 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2937 maintained 0.8.x compatibility because I don't think many are using it, and
2938 it is clearly obsolete.
2940 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2943 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2944 client certificate was expired. A simple patch fixes this, though I don't
2945 understand the full logic of why the verify callback is called multiple
2948 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2949 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2950 which causes problems with some clients (such as the Certicom SSL Plus
2951 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2952 disables the coutermeasure allowing Eudora to connect."
2954 38. Exim was not checking that a write() to a log file succeeded. This could
2955 lead to Bad Things if a log got too big, in particular if it hit a file
2956 size limit. Exim now panics and dies if it cannot write to a log file, just
2957 as it does if it cannot open a log file.
2959 39. Modified OS/Makefile-Linux so that it now contains
2961 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2963 The two -D definitions ensure that Exim is compiled with large file
2964 support, which makes it possible to handle log files that are bigger than
2967 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2968 instance) a domain was checked against a named list that involved a lookup,
2969 causing $domain_data to be set, then another domain was checked against the
2970 same list, then the first domain was re-checked, the value of $domain_data
2971 after the final check could be wrong. In particular, if the second check
2972 failed, it could be set empty. This bug probably also applied to
2975 41. The strip_trailing_dot option was not being applied to the address given
2976 with the -f command-line option.
2978 42. The code for reading a message's header from the spool was incrementing
2979 $received_count, but never initializing it. This meant that the value was
2980 incorrect (doubled) while delivering a message in the same process in which
2981 it was received. In the most common configuration of Exim, this never
2982 happens - a fresh exec is done - but it can happen when
2983 deliver_drop_privilege is set.
2985 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2986 it now includes up to 150 characters of the unexpected data in the log
2989 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2990 and building data strings. The size of both of these buffers was 10 000
2991 bytes - far larger than anybody would *ever* want, thought I. Needless to
2992 say, somebody hit the limit. I have increased the maximum line length to
2993 20 000 and the maximum data length of concatenated lines to 100 000. I have
2994 also fixed two bugs, because there was no checking on these buffers. Tsk,
2995 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2996 buffer is too small.
2998 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2999 lsearch lookups. Now it does.
3001 46. When parsing a route_list item in a manualroute router, a fixed-length
3002 buffer was used for the list of hosts. I made this 1024 bytes long,
3003 thinking that nobody would ever have a list of hosts that long. Wrong.
3004 Somebody had a whole pile of complicated expansion conditions, and the
3005 string was silently truncated, leading to an expansion error. It turns out
3006 that it is easier to change to an unlimited length (owing to other changes
3007 that have happened since this code was originally written) than to build
3008 structure for giving a limitation error. The length of the item that
3009 expands into the list of hosts is now unlimited.
3011 47. The lsearch lookup could not handle data where the length of text line was
3012 more than 4095 characters. Such lines were truncated, leading to shortened
3013 data being returned. It should now handle lines of any length.
3015 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3016 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3019 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3020 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3021 no longer happens in comment lines. A list of replacements is now placed
3022 at the head of all of the source files, except those whose only change is
3023 to replace PERL_COMMAND in the very first #! line.
3025 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3026 messages on the queue, with a bottom-up merge sort, using code contributed
3027 by Michael Haardt. This should make operations like -bp somewhat faster on
3028 large queues. It won't affect queue runners, except when queue_run_in_order
3031 51. Installed eximstats 1.31 in the distribution.
3033 52. Added support for SRV lookups to the dnslookup router.
3035 53. If an ACL referred to $message_body or $message_body_end, the value was not
3036 reset for any messages that followed in the same SMTP session.
3038 54. The store-handling optimization for building very long strings was not
3039 differentiating between the different store pools. I don't think this
3040 actually made any difference in practice, but I've tidied it.
3042 55. While running the routers to verify a sender address, $sender_address
3043 was still set to the sender address. This is wrong, because when routing to
3044 send a bounce to the sender, it would be empty. Therefore, I have changed
3045 it so that, while verifying a sender address, $sender_address is set to <>.
3046 (There is no change to what happens when verifying a recipient address.)
3048 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3049 target A or AAAA records (if not already returned) without resetting the
3050 qualify_single or search_parents options of the DNS resolver. These are
3051 inappropriate in this case because the targets of MX and SRV records must
3052 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3053 target that, when qualified, matched something in the local domain. These
3054 two options are now turned off when doing these lookups.
3056 57. It seems that at least some releases of Reiserfs (which does not have the
3057 concept of a fixed number of inodes) returns zero and not -1 for the
3058 number of available inodes. This interacted badly with check_spool_inodes,
3059 which assumed that -1 was the "no such thing" setting. What I have done is
3060 to check that the total number of inodes is greater than zero before doing
3061 the test of how many are available.
3063 58. When a "warn" ACL statement has a log_message modifier, the message is
3064 remembered, and not repeated. This is to avoid a lot of repetition when a
3065 message has many recipients that cause the same warning to be written.
3066 Howewer, Exim was preserving the list of already written lines for an
3067 entire SMTP session, which doesn't seem right. The memory is now reset if a
3068 new message is started.
3070 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3071 debugging output unless log_rewrite was also set.
3073 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3074 of (int)(handle) when we know that handle contains (void *)(-1).
3076 61. The Exim daemon panic-logs an error return when it closes the incoming
3077 connection. However "connection reset by peer" seems to be common, and
3078 isn't really an error worthy of noting specially, so that particular error
3081 62. When Exim is trying to find all the local interfaces, it used to panic and
3082 die if the ioctl to get the interface flags failed. However, it seems that
3083 on at least one OS (Solaris 9) it is possible to have an interface that is
3084 included in the list of interfaces, but for which you get a failure error
3085 for this call. This happens when the interface is not "plumbed" into a
3086 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3087 failure of the "get flags" call assumes that the interface is down.
3089 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3090 makes life easier for people who are doing arithmetic on fields extracted
3091 from dates, where you often get leading zeros that should not be
3092 interpreted as octal.
3094 64. Added qualify_domain to the redirect router, to override the global
3097 65. If a pathologically long header line contained very many addresses (the
3098 report of this problem mentioned 10 000) and each of them was rewritten,
3099 Exim could use up a very large amount of memory. (It kept on making new
3100 copies of the header line as it rewrote, and never released the old ones.)
3101 At the expense of a bit more processing, the header rewriting function has
3102 been changed so that it no longer eats memory in this way.
3104 66. The generation of the Received: header has been moved from the time that a
3105 message starts to be received, to the time that it finishes. The timestamp
3106 in the Received: header should now be very close to that of the <= log
3107 line. There are two side-effects of this change:
3109 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3110 logged header lines no longer include the local Received: line, because
3111 it has not yet been created. The same applies to a copy of the message
3112 that is returned to a non-SMTP sender when a message is rejected.
3114 (b) When a filter file is tested using -bf, no additional Received: header
3115 is added to the test message. After some thought, I decided that this
3118 This change does not affect the value of $received_for. It is still set
3119 after address rewriting, but before local_scan() is called.
3121 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3123 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3124 gave an unhelpful panic error message, and a defer error. I have managed to
3125 change this behaviour so that it now rejects any supplied certificate,
3126 which seems right, as the list of acceptable certificates is empty.
3128 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3129 gave an unhelpful defer error. I have not managed to make this reject any
3130 supplied certificates, but the error message it gives is "no certificate
3131 supplied", which is not helpful.
3133 70. exigrep's output now also includes lines that are not associated with any
3134 message, but which match the given pattern. Implemented by a patch from
3135 Martin Sluka, which also tidied up the Perl a bit.
3137 71. Recipient callout verification, like sender verification, was using <> in
3138 the MAIL FROM command. This isn't really the right thing, since the actual
3139 sender may affect whether the remote host accepts the recipient or not. I
3140 have changed it to use the actual sender in the callout; this means that
3141 the cache record is now keyed on a recipient/sender pair, not just the
3142 recipient address. There doesn't seem to be a real danger of callout loops,
3143 since a callout by the remote host to check the sender would use <>.
3144 [SEE ABOVE: changed after hitting problems.]
3146 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3147 temporary errors. However, in the case of such a code being given after
3148 the end of a data transmission (i.e. after ".") Exim was failing to write
3149 a retry record for the message. (Yes, there was some broken host that was
3150 actually sending 8xx at this point.)
3152 73. An unknown lookup type in a host list could cause Exim to panic-die when
3153 the list was checked. (An example that provoked this was putting <; in the
3154 middle of a list instead of at the start.) If this happened during a DATA
3155 ACL check, a -D file could be left lying around. This kind of configuration
3156 error no longer causes Exim to die; instead it causes a defer errror. The
3157 incident is still logged to the main and panic logs.
3159 74. Buglet left over from Exim 3 conversion. The message "too many messages
3160 in one connection" was written to the rejectlog but not the mainlog, except
3161 when address rewriting (yes!) was being logged.
3163 75. Added write_rejectlog option.
3165 76. When a system filter was run not as root (that is, when system_filter_user
3166 was set), the values of the $n variables were not being returned to the
3167 main process; thus, they were not subsequently available in the $sn
3170 77. Added +return_path_on_delivery log selector.
3172 78. A connection timeout was being treated differently from recipients deferred
3173 when testing hosts_max_try with a message that was older than the host's
3174 retry timeout. (The host should not be counted, thus allowing all hosts to
3175 be tried at least once before bouncing.) This may have been the cause of an
3176 occasionally reported bug whereby a message would remain on the queue
3177 longer than the retry timeout, but would be bounced if a delivery was
3178 forced. I say "may" because I never totally pinned down the problem;
3179 setting up timeout/retry tests is difficult. See also the next item.
3181 79. The ultimate address timeout was not being applied to errors that involved
3182 a combination of host plus message (for example, a timeout on a MAIL
3183 command). When an address resolved to a number of possible hosts, and they
3184 were not all tried for each delivery (e.g. because of hosts_max_try), a
3185 message could remain on the queue longer than the retry timeout.
3187 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3190 81. Fixed an obscure SMTP outgoing bug which required at least the following
3191 conditions: (a) there was another message waiting for the same server;
3192 (b) the server returned 5xx to all RCPT commands in the first message so
3193 that the message was not completed; (c) the server dropped the connection
3194 or gave a negative response to the RSET that Exim sends to abort the
3195 transaction. The observed case was a dropped connection after DATA that had
3196 been sent in pipelining mode. That is, the server had advertised PIPELINING
3197 but was not implementing it correctly. The effect of the bug was incorrect
3198 behaviour, such as trying another host, and this could lead to a crash.
3204 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3205 and daemon.c were passed as pointers to ints; they should have been
3206 pointers to socklen_t variables (which are typically unsigned ints).
3208 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3211 3. Fixed a really odd bug that affected only the testing scheme; patching a
3212 certain fixed string in the binary changed the value of another string that
3213 happened to be identical to the end of the original first string.
3215 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3216 name", it returns that address as the IP address. On some operating
3217 systems (e.g. Solaris), it also passes back the IP address string as the
3218 "host name". However, on others (e.g. Linux), it passes back an empty
3219 string. Exim wasn't checking for this, and was changing the host name to an
3220 empty string, assuming it had been canonicized.
3222 5. Although rare, it is permitted to have more than one PTR record for a given
3223 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3224 all the names associated with an address, because they do in Solaris.
3225 However, it seems that they do not in Linux for data that comes from the
3226 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3227 I found this out when I moved to a new Linux workstation and tried to run
3228 the Exim test suite.
3230 To get round this problem I have changed the code so that it now does its
3231 own call to the DNS to look up PTR records when searching for a host name.
3232 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3233 addresses that are only in /etc/hosts are still found.
3235 This behaviour is, however, controlled by an option called host_lookup_
3236 order, which defaults to "bydns:byaddr". If people want to use the other
3237 order, or indeed, just use one or the other means of lookup, they can
3238 specify it in this variable.
3240 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3241 some operating systems, this comes back from gethostbyaddr() as an empty
3242 string, and this is what Exim used to test for. However, it seems that in
3243 other systems, "." is yielded. Exim now tests for this case too.
3245 7. The values of check_spool_space and check_log_space are now held internally
3246 as a number of kilobytes instead of an absolute number of bytes. If a
3247 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3248 kilobyte. This means that much larger values can be stored.
3250 8. Exim monitor: an attempt to get the action menu when not actually pointing
3251 at a message produces an empty menu entitled "No message selected". This
3252 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3253 no entries in it ("Shell widget menu has zero width and/or height"). So I
3254 have added a single, blank menu entry in this case.
3256 9. Added ${quote_local_part.
3258 10. MIME decoding is now applied to the contents of Subject: header lines when
3261 11. Now that a reference to $sender_host_address automatically causes a reverse
3262 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3263 host lookup before query-style lookups in lists that might use this
3264 variable. This has therefore been abolished, and the "net-" prefix is no
3265 longer necessary for query-style lookups.
3267 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3268 have been a typo for LFLAGS, so it has been changed.
3270 13. The install script calls Exim with "-C /dev/null" in order to find the
3271 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3272 to be output. Howeve, since Exim outputs its version number before the
3273 error, it didn't break the script. It just looked ugly. I fixed this by
3274 always allowing "-C /dev/null" if the caller is root.
3276 14. Ignore overlarge ACL variable number when reading spool file - insurance
3277 against a later release with more variables having written the file.
3279 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3280 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3281 this, as well as the form without the "IPv6" on the front.
3283 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3284 OS/Makefile-Darwin file.
3286 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3287 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3289 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3290 variable. However, some OS use ints for inodes. I've added cast to long int
3291 to get rid of the compiler warning.
3293 19. I had forgotten to lock out "/../" in configuration file names when
3294 ALT_CONFIG_PREFIX was set.
3296 20. Routers used for verification do not need to specify transports. However,
3297 if such a router generated a host list, and callout was configured, Exim
3298 crashed, because it could not find a port number from the (non-existent)
3299 transport. It now assumes port 25 in this circumstance.
3301 21. Added the -t option to exigrep.
3303 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3304 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3305 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3306 them is set, LOOKUP_LSEARCH is forced.
3308 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3310 24. Added sender and host information to the "rejected by local_scan()" log
3311 line; previously there was no indication of these.
3313 25. Added .include_if_exists.
3315 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3316 Linux. It turns out that not all file systems support this. Apparently some
3317 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3318 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3319 not supported on the file descriptor, is now ignored when Exim is trying to
3320 sync a directory. This applies only to Linux.
3322 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3324 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3325 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3328 29. Added support for maildirsize files from supplied patch (modified a bit).
3330 30. The use of :fail: followed by an empty string could lead Exim to respond to
3331 sender verification failures with (e.g.):
3333 550 Verification failed for <xxx>
3334 550 Sender verify failed
3336 where the first response line was missing the '-' that indicates it is not
3337 the final line of the response.
3339 31. The loop for finding the name of the user that called Exim had a hardwired
3340 limit of 10; it now uses the value of finduser_retries, which is used for
3341 all other user lookups.
3343 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3346 33. Exim was neglecting to zero errno before one call of strtol() when
3347 expanding a string and expecting an integer value. On some systems this
3348 resulted in spurious "integer overflow" errors. Also, it was casting the
3349 result into an int without checking.
3351 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3352 did not work. The code looks as if it has *never* worked, though it appears
3353 to have been documented since at least releast 1.62. I have made it work.
3355 35. The "timeout_DNS" error in retry rules, also documented since at least
3356 1.62, also never worked. As it isn't clear exactly what this means, and
3357 clearly it isn't a major issue, I have abolished the feature by treating it
3358 as "timeout", and writing a warning to the main and panic logs.
3360 36. The display of retry rules for -brt wasn't always showing the error code
3363 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3364 timeout_connect_A, timeout_connect_MX.
3366 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3367 to the empty sender.
3369 39. The daemon was not analysing the content of -oX till after it had closed
3370 stderr and disconnected from the controlling terminal. This meant that any
3371 syntax errors were only noted on the panic log, and the return code from
3372 the command was 0. By re-arranging the code a little, I've made the
3373 decoding happen first, so such errors now appear on stderr, and the return
3374 code is 1. However, the actual setting up of the sockets still happens in
3375 the disconnected process, so errors there are still only recorded on the
3378 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3379 connections (as happens on some IP stacks) was logged at start up time as
3380 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3381 it from "IPv6 and IPv4", which means that two separate sockets are being
3384 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3385 says whether AF_INET or AF_INET6 was passed as an argument.
3387 42. Exiwhat output was messed up when time zones were included in log
3390 43. Exiwhat now gives more information about the daemon's listening ports,
3391 and whether -tls-on-connect was used.
3393 44. The "port" option of the smtp transport is now expanded.
3395 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3396 silently ignored. Now an error message is written to the main and panic
3399 46. There's a new ACL modifier called "logwrite" which writes to a log file
3400 as soon as it is encountered.
3402 47. Added $local_user_uid and $local_user_gid at routing time.
3404 48. Exim crashed when trying to verify a sender address that was being
3407 49. Exim was recognizing only a space character after ".include". It now also
3408 recognizes a tab character.
3410 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3411 extracting the relevant information from the specification. The man page no
3412 longer contains scrambled data for the -d option, and I've added a section
3413 at the front about calling Exim under different names.
3415 51. Added "extra_headers" argument to the "mail" command in filter files.
3417 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3420 53. Installed eximstats 1.29.
3422 54. Added transport_filter_timeout as a generic transport option.
3424 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3425 Cc: header lines. This was required by RFC 822, but it not required by RFC
3428 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3429 incoming messages that did not have them. Now it does so only if the
3430 message originates locally, that is, if there is no associated remote host
3431 address. When Resent- header lines are present, this applies to the Resent-
3432 lines rather than the non-Resent- lines.
3434 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3435 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3437 58. Messages for configuration errors now include the name of the main
3438 configuration file - useful now that there may be more than one file in a
3439 list (.included file names were always shown).
3441 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3442 for those rare installations that do not start the daemon as root or run it
3443 setuid root. I've cut out the call to initgroups() if the daemon is not
3446 60. The Exim user and group can now be bound into the binary as text strings
3447 that are looked up at the start of Exim's processing.
3449 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3451 62. Added $mailstore_basename variable.
3453 63. Installed patch to sieve.c from Michael Haardt.
3455 64. When Exim failed to open the panic log after failing to open the main log,
3456 the original message it was trying to log was written to stderr and debug
3457 output, but if they were not available (the usual case in production), it
3458 was lost. Now it is written to syslog before the two lines that record the
3459 failures to open the logs.
3461 65. Users' Exim filters run in subprocesses under the user's uid. It is
3462 possible for a "deliver" command or an alias in a "personal" command to
3463 provoke an address rewrite. If logging of address rewriting is configured,
3464 this fails because the process is not running as root or exim. There may be
3465 a better way of dealing with this, but for the moment (because 4.30 needs
3466 to be released), I have disabled address rewrite logging when running a
3467 filter in a non-root, non-exim process.
3473 1. The buildconfig auxiliary program wasn't quoting the value set for
3474 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3475 not defined. This bug was masked in 4.22 by the effect that was fixed in
3478 2. Some messages that were rejected after a message id was allocated were
3479 shown as "incomplete" by exigrep. It no longer does this for messages that
3480 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3482 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3483 have allow_domain_literals set, the ID did not get logged in the <= line.
3484 Domain literals are now always recognized in Message-ID: header lines.
3486 4. The first argument for a ${extract expansion item is the key name or field
3487 number. Leading and trailing spaces in this item were not being ignored,
3488 causing some misleading effects.
3490 5. When deliver_drop_privilege was set, single queue runner processes started
3491 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3492 same command in the process it spins off) were not dropping privilege.
3494 6. When the daemon running as "exim" started a queue runner, it always
3495 re-executed Exim in the spun-off process. This is a waste of effort when
3496 deliver_drop_privilege is set. The new process now just calls the
3497 queue-runner function directly.
3503 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3506 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3507 ignored. Though the use of -oP was forcing the writing of a pid file, it
3508 was always written to the default place.
3510 3. If the message "no IP address found for host xxxx" is generated during
3511 incoming verification, it is now followed by identification of the incoming
3512 connection (so you can more easily find what provoked it).
3514 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3516 5. Added some features to "harden" Exim a bit more against certain attacks:
3518 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3519 be put in Local/Makefile. This is like the never_users runtime option,
3520 but it cannot be overridden. The default setting is "root".
3522 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3523 prefix string with which any file named in a -C command line option
3526 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3527 is retained for -C and -D only if the caller of Exim is root. Without
3528 it, the exim user may also use -C and -D and retain privilege.
3530 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3531 command line option is disabled.
3533 6. Macro names set by the -D option must start with an upper case letter, just
3534 like macro names defined in the configuration file.
3536 7. Added "dereference=" facility to LDAP.
3538 8. Two instances of the typo "uknown" in the source files are fixed.
3540 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3541 the Configure-Makefile script screwed up while processing it.
3543 10. Incorporated PCRE 4.4.
3545 11. The SMTP synchronization check was not operating right at the start of an
3546 SMTP session. For example, it could not catch a HELO sent before the client
3547 waited for the greeting. There is now a check for outstanding input at the
3548 point when the greeting is written. Because of the duplex, asynchronous
3549 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3550 way, but not yet received, when the check is performed.
3552 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3553 on TCP/IP sockets, because this apparently causes some broken clients to
3556 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3557 unchanged) from the Cygwin maintainer.
3559 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3560 was supported instead of testing for mbx. Effectively a typo.
3562 15. The spa authenticator server code was not checking that the input it
3563 received was valid base64.
3565 16. The debug output line for the "set" modifier in ACLs was not showing the
3566 name of the variable that was being set.
3568 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3570 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3571 lookup on its own. Something else was needed to trigger the lookup. For
3572 example, a match in host_lookup or the need for a host name in a host list.
3573 Now, if $sender_host_name is referenced and the host name has not yet been
3574 looked up, a lookup is performed. If the lookup fails, the variable remains
3575 empty, and $host_lookup_failed is set to "1".
3577 19. Added "eqi" as a case-independent comparison operator.
3579 20. The saslauthd authentication condition could segfault if neither service
3580 nor realm was specified.
3582 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3583 error message that was logged was misleading, and incoming SMTP
3584 connections were dropped. The message is now more accurate, and temporary
3585 errors are given to SMTP connections.
3587 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3588 (except RSET) with a 421 error, until QUIT is received. However, it was
3589 failing to send a response to QUIT.
3591 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3592 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3593 ACL is now run after the helo_try_verify_hosts code.
3595 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3596 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3597 case-independent, so other case variants are also recognized). Apparently
3598 some systems use these upper case variants.
3600 25. If more than two messages were waiting for the same host, and a transport
3601 filter was specified for the transport, Exim sent two messages over the
3602 same TCP/IP connection, and then failed with "socket operation on non-
3603 socket" when it tried to send the third.
3605 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3607 27. The extern definition of crypt16() in expand.c was not being excluded when
3608 the OS had its own crypt16() function.
3610 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3611 as a preferred synonym for return_size_limit, both as an option and as an
3614 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3616 30. Changed the default configuration ACL to relax the local part checking rule
3617 for addresses that are not in any local domains. For these addresses,
3618 slashes and pipe symbols are allowed within local parts, but the sequence
3619 /../ is explicitly forbidden.
3621 31. SPA server authentication was not clearing the challenge buffer before
3624 32. log_message in a "warn" ACL statement was writing to the reject log as
3625 well as to the main log, which contradicts the documentation and doesn't
3626 seem right (because no rejection is happening). So I have stopped it.
3628 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3629 However, I am unable to do any testing of this.
3631 34. Fixed an infelicity in the appendfile transport. When checking directories
3632 for a mailbox, to see if any needed to be created, it was accidentally
3633 using path names with one or more superfluous leading slashes; tracing
3634 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3636 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3637 contents are added to the log line that is written for every discarded
3638 recipient. (Previously a log_message setting was ignored.)
3640 36. The ${quote: operator now quotes the string if it is empty.
3642 37. The install script runs exim in order to find its version number. If for
3643 some reason other than non-existence or emptiness, which it checks, it
3644 could not run './exim', it was installing it with an empty version number,
3645 i.e. as "exim-". This error state is now caught, and the installation is
3648 38. An argument was missing from the function that creates an error message
3649 when Exim fails to connect to the socket for saslauthd authentication.
3650 This could cause Exim to crash, or give a corrupted message.
3652 39. Added isip, isip4, and isip6 to ${if conditions.
3654 40. The ACL variables $acl_xx are now saved with the message, and can be
3655 accessed later in routers, transports, and filters.
3657 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3658 strings in the file are not string-expanded.
3660 42. If a MAIL command specified a SIZE value that was too large to fit into an
3661 int variable, the check against message_size_limit failed. Such values are
3662 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3663 day this will have to be increased, but I don't think I want to be around
3664 when emails are that large.
3671 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3672 iconv() is not standard in FreeBSD.
3674 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3675 IPv6 enabled. The observed symptom was a segmentation fault on return from
3676 the function os_common_find_running_interfaces() in src/os.c.
3678 3. In the check_special_case() function in daemon.c I had used "errno" as an
3679 argument name, which causes warnings on some systems. This was basically a
3680 typo, since it was named "eno" in the comments!
3682 4. The code that waits for the clock to tick (at a resolution of some fraction
3683 of a second) so as to ensure message-id uniqueness was always waiting for
3684 at least one whole tick, when it could have waited for less. [This is
3685 almost certainly not relevant at current processor speeds, where it is
3686 unlikely to ever wait at all. But we try to future-proof.]
3688 5. The function that sleeps for a time interval that includes fractions of a
3689 second contained a race. It did not block SIGALRM between setting the
3690 timer, and suspending (a couple of lines later). If the interval was short
3691 and the sigsuspend() was delayed until after it had expired, the suspension
3692 never ended. On busy systems this could lead to processes getting stuck for
3695 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3696 process, before it forks any delivery processes. The open lookup caching
3697 mechanism meant that the open file or database connection was passed into
3698 the delivery process. The problem was that delivery processes always tidy
3699 up cached lookup data. This could cause a problem for the next delivery
3700 process started by the queue runner, because the external queue runner
3701 process does not know about the closure. So the next delivery process
3702 still has data in the lookup cache. In the case of a file lookup, there was
3703 no problem because closing a file descriptor in a subprocess doesn't affect
3704 the parent. However, if the lookup was caching a connection to a database,
3705 the connection was closed, and the second delivery process was likely to
3706 see errors such as "PGSQL: query failed: server closed the connection
3707 unexpectedly". The problem has been fixed by closing all cached lookups
3708 in a queue runner before running a delivery process.
3710 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3711 seem to have the "const" qualifier which it has on other OS. I've
3714 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3715 *of the same type* (client or server) with the same public name that an
3716 error should be diagnosed.
3718 9. When Exim looked up a host name for an IP address, but failed to find the
3719 original IP address when looking up the host name (a safety check), it
3720 output the message "<ip address> does not match any IP for NULL", which was
3721 confusing, to say the least. The bug was that the host name should have
3722 appeared instead of "NULL".
3724 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3725 user that is built into the binary, and the -C or -D options is used, root
3726 privilege is dropped before the configuration file is read. In addition,
3727 logging is switched to stderr instead of the normal log files. If the
3728 configuration then re-defines the Exim user, the unprivileged environment
3729 is probably not what is expected, so Exim logs a panic warning message (but
3732 However, if deliver_drop_privilege is set, the unprivileged state may well
3733 be exactly what is intended, so the warning has been cut out in that case,
3734 and Exim is allowed to try to write to its normal log files.
3740 1. smtp_return_error_details was not giving details for temporary sender
3741 or receiver verification errors.
3743 2. Diagnose a configuration error if two authenticators have the same public
3746 3. Exim used not to create the message log file for a message until the first
3747 delivery attempt. This could be confusing when incoming messages were held
3748 for policy or load reasons. The message log file is now created at the time
3749 the message is received, and an initial "Received" line is written to it.
3751 4. The automatically generated man page for command line options had a minor
3752 bug that caused no ill effects; however, a more serious problem was that
3753 the procedure for building the man page automatically didn't always
3754 operate. Consequently, release 4.20 contains an out-of-date version. This
3755 shouldn't happen again.
3757 5. When building Exim with embedded Perl support, the script that builds the
3758 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3759 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3761 6. The freeze_tell option was not being used for messages that were frozen on
3762 arrival, either by an ACL or by local_scan().
3764 7. Added the smtp_incomplete_transaction log selector.
3766 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3767 was accepting AUTH without a new EHLO.
3769 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3770 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3773 10. Logging of TCP/IP connections (when configured) now happens in the main
3774 daemon process instead of the child process, so that the TCP/IP connection
3775 count is more accurate (but it can never be perfect).
3777 11. The use of "drop" in a nested ACL was not being handled correctly in the
3778 outer ACL. Now, if condition failure induced by the nested "drop" causes
3779 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3780 or "require"), the connection is dropped.
3782 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3783 that yield "discard" can now be used with an "accept" or a "discard" verb,
3784 but an error is generated for any others (because I can't see a useful way
3785 to define what should happen).
3787 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3788 are now processed in the same way as lines in the Exim configuration file.
3789 In particular, continuation lines are supported.
3791 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3793 15. Added -ti meaning -t -i.
3795 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3796 domains, and warn by logging if others are found.
3798 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3799 returned from GIFCONF when Exim is trying to find the list of interfaces on
3800 a host. The code in os.c has been modified to copy each ifreq to an aligned
3801 structure in all cases.
3803 Also, in some cases, the returned ifreq's were being copied to a 'struct
3804 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3805 means the last couple of bytes of an IPv6 address could be chopped if the
3806 ifreq contained only a normal sockaddr (14 bytes storage).
3808 18. Named domain lists were not supported in the hosts_treat_as_local option.
3809 An entry such as +xxxx was not recognized, and was treated as a literal
3812 19. Ensure that header lines added by a DATA ACL are included in the reject log
3813 if the ACL subsequently rejects the message.
3815 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3816 MD5 (which is deprecated).
3818 21. When testing a filter file using -bf, Exim was writing a message when it
3819 took the sender from a "From " line in the message, but it was not doing so
3820 when it took $return_path from a Return-Path: header line. It now does.
3822 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3823 with a valid header line field name (a series of printing characters
3824 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3826 23. Changed "disc" in the source to "disk" to conform to the documentation and
3827 the book and for uniformity.
3829 24. Ignore Sendmail's -Ooption=value command line item.
3831 25. When execve() failed while trying to run a command in a pipe transport,
3832 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3833 could be confused with a return value of 69 from the command itself. This
3834 has been changed to 127, the value the shell returns if it is asked to run
3835 a non-existent command. The wording for the related log line suggests a
3836 non-existent command as the problem.
3838 26. If received_header_text expands to an empty string, do not add a Received:
3839 header line to the message. (Well, it adds a token one on the spool, but
3840 marks it "old" so that it doesn't get used or transmitted.)
3842 27. Installed eximstats 1.28 (addition of -nt option).
3844 28. There was no check for failure on the call to getsockname() in the daemon
3845 code. This can fail if there is a shortage of resources on the system, with
3846 ENOMEM, for example. A temporary error is now given on failure.
3848 29. Contrary to the C standard, it seems that in some environments, the
3849 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3850 program. Exim now does this explicitly; it affects the formatting of
3851 timestamps using strftime().
3853 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3854 complaints. I've now initialized all the variables, to avoid this.
3856 32. Header lines added by a system filter were not being "seen" during
3857 transport-time rewrites.
3859 33. The info_callback() function passed to OpenSSL is set up with type void
3860 (*)(SSL *, int, int), as described somewhere. However, when calling the
3861 function (actually a macro) that sets it up, the type void(*)() is
3862 expected. I've put in a cast to prevent warnings from picky compilers.
3864 34. If a DNS black list lookup found a CNAME record, but there were no A
3865 records associated with the domain it pointed at, Exim crashed.
3867 35. If a DNS black list lookup returned more than one A record, Exim ignored
3868 all but the first. It now scans all returned addresses if a particular IP
3869 value is being sought. In this situation, the contents of the
3870 $dnslist_value variable are a list of all the addresses, separated by a
3873 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3874 to accept a host name and all its aliases if the forward lookup for any of
3875 them yielded the IP address of the incoming connection. Now it accepts only
3876 those names whose forward lookup yields the correct IP address. Any other
3877 names are discarded. This closes a loophole whereby a rogue DNS
3878 administrator could create reverse DNS records to break through a
3879 wildcarded host restriction in an ACL.
3881 37. If a user filter or a system filter that ran in a subprocess used any of
3882 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3883 the wrong values were passed to the pipe command ($thisaddress had the
3884 value of $0, $0 had the value of $1, etc). This bug was introduced by
3885 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3887 38. Improved the line breaking for long SMTP error messages from ACLs.
3888 Previously, if there was no break point between 40 and 75 characters, Exim
3889 left the rest of the message alone. Two changes have been made: (a) I've
3890 reduced the minimum length to 35 characters; (b) if it can't find a break
3891 point between 35 and 75 characters, it looks ahead and uses the first one
3892 that it finds. This may give the occasional overlong line, but at least the
3893 remaining text gets split now.
3895 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3896 file descriptors might be low, and that setting 1000 would always raise it.
3897 It turns out that in some environments, the limit is already over 1000 and
3898 that lowering it causes trouble. So now Exim takes care not to decrease it.
3900 40. When delivering a message, the value of $return_path is set to $sender_
3901 address at the start of routing (routers may change the value). By an
3902 oversight, this default was not being set up when an address was tested by
3903 -bt or -bv, which affected the outcome if any router or filter referred to
3906 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3907 log only when "message" or "log_message" are set. However, if one of the
3908 conditions was an address verification, or a call to a nested ACL, the
3909 messages generated by the underlying test were being passed through. This
3910 no longer happens. The underlying message is available in $acl_verify_
3911 message for both "message" and "log_message" expansions, so it can be
3912 passed through if needed.
3914 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3915 new expansion $bh_ to give the encoded byte string without charset
3916 translation. Translation happens only if iconv() is available; HAVE_ICONV
3917 indicates this at build time. HEADERS_CHARSET gives the charset to
3918 translate to; headers_charset can change it in the configuration, and
3919 "headers charset" can change it in an individual filter file.
3921 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3922 that creates RFC 2047 encoded "words" labels them as that charset instead
3923 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3924 expansion operator; (ii) when Exim creates a From: line for a local
3925 message; (iii) when a header line is rewritten to include a "phrase" part.
3927 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3928 buggy, causing it to skip the first lines of messages whose message ID
3929 ended in 'D'. This would not have bitten before Exim release 4.14, because
3930 message IDs were unlikely to end in 'D' before then. The effect was to have
3931 incorrect size information for certain domains.
3933 45. #include "config.h" was missing at the start of the crypt16.c module. This
3934 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3937 46. If there was a timeout during a "random" callout check, Exim treated it as
3938 a failure of the random address, and carried on sending RSET and the real
3939 address. If the delay was just some slowness somewhere, the response to the
3940 original RCPT would be taken as a response to RSET and so on, causing
3941 mayhem of various kinds.
3943 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3944 when I implemented it. It didn't allow for the fact that some option values
3945 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3946 the right test for positive values.
3948 48. Domain names in DNS records are case-independent. Exim always looks them up
3949 in lower case. Some resolvers return domain names in exactly the case they
3950 appear in the zone file, that is, they may contain uppercase letters. Not
3951 all resolvers do this - some return always lower case. Exim was treating a
3952 change of case by a resolver as a change of domain, similar to a widening
3953 of a domain abbreviation. This triggered its re-routing code and so it was
3954 trying to route what was effectively the same domain again. This normally
3955 caused routing to fail (because the router wouldn't handle the domain
3956 twice). Now Exim checks for this case specially, and just changes the
3957 casing of the domain that it ultimately uses when it transmits the message
3960 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3963 50. If a filter generated a file delivery with a non-absolute name (possible if
3964 no home directory exists for the router), the forbid_file option was not
3967 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3968 the existing equality matching.
3970 52. Exim was using ints instead of ino_t variables in some places where it was
3971 dealing with inode numbers.
3973 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3974 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3975 called TMPDIR, and if it finds it is different, it changes its value.
3977 54. The smtp_printf() function is now made available to local_scan() so
3978 additional output lines can be written before returning. There is also an
3979 smtp_fflush() function to enable the detection of a dropped connection.
3980 The variables smtp_input and smtp_batched_input are exported to
3983 55. Changed the default runtime configuration: the message "Unknown user"
3984 has been removed from the ACL, and instead placed on the localuser router,
3985 using the cannot_route_message feature. This means that any verification
3986 failures that generate their own messages won't get overridden. Similarly,
3987 the "Unrouteable address" message that was in the ACL for unverifiable
3988 relay addresses has also been removed.
3990 56. Added hosts_avoid_esmtp to the smtp transport.
3992 57. The exicyclog script was not checking for the esoteric option
3993 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3994 will work only if exicyclog is run under the appropriate euid.
3996 58. Following a discussion on the list, the rules by which Exim recognises line
3997 endings on incoming messages have been changed. The -dropcr and drop_cr
3998 options are now no-ops, retained only for backwards compatibility. The
3999 following line terminators are recognized: LF CRLF CR. However, special
4000 processing applies to CR:
4002 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4003 nor a local message in the state where . is a terminator.
4005 (ii) If a bare CR is encountered in a header line, an extra space is added
4006 after the line terminator so as not to end the header. The reasoning
4007 behind this is that bare CRs in header lines are most likely either
4008 to be mistakes, or people trying to play silly games.
4010 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4011 was being incorrectly given as 18 bytes larger than it should have been.
4012 This is a VOB (very old bug).
4014 60. This may never have affected anything current, but just in case it has:
4015 When the local host is found other than at the start of a list of hosts,
4016 the local host, those with the same MX, and any that follow, are discarded.
4017 When the list in question was part of a longer list of hosts, the following
4018 hosts (not currently being processed) were also being discarded. This no
4019 longer happens. I'm not sure if this situation could ever has previously
4022 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4025 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4026 header. This is something that is recommended in a new Internet Draft, and
4027 is something that is documented as being done by Sendmail. There are two
4028 possible values. For messages generated by the autoreply transport, Exim
4031 Auto-Submitted: auto-replied
4033 whereas for all other generated messages (e.g. bounces) it adds
4035 Auto-Submitted: auto-generated
4037 63. The "personal" condition in filters now includes a test for the
4038 Auto-Submitted: header. If it contains the string "auto-" the message it
4039 not considered personal.
4041 64. Added rcpt_include_affixes as a generic transport option.
4043 65. Added queue_only_override (default true).
4045 66. Added the syslog_duplication option.
4047 67. If what should have been the first header line of a message consisted of
4048 a space followed by a colon, Exim was mis-interpreting it as a header line.
4049 It isn't of course - it is syntactically invalid and should therefore be
4050 treated as the start of the message body. The misbehaviour could have
4051 caused a number of strange effects, including loss of data in subsequent
4052 header lines, and spool format errors.
4054 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4055 client host had authenticated. This control can now be exercised by an ACL
4056 for more flexibility.
4058 69. By default, callouts do not happen when testing with -bh. There is now a
4059 variant, -bhc, which does actually run the callout code, including
4060 consulting and updating the callout cache.
4062 70. Added support for saslauthd authentication, courtesy of Alexander
4065 71. If statvfs() failed on the spool or log directories while checking their
4066 size for availability, Exim confusingly gave the error "space shortage".
4067 Furthermore, in debugging mode it crashed with a floating point exception.
4068 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4069 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4070 serious problem, Exim now writes to the main and panic logs when this
4071 happens, with details of the failure. It then refuses to accept the
4072 incoming message, giving the message "spool directory problem" or "log
4073 directory problem" with a 421 code for SMTP messages.
4075 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4076 0, 1, and 2 exist, because some OS complain for execs without them (see
4077 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4078 descriptors. However, the code omitted to check that the open succeeded,
4079 causing mysterious errors if for some reason the permissions on /dev/null
4080 got screwed. Now Exim writes a message to the main and panic logs, and
4081 bombs out if it can't open /dev/null.
4083 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4084 interact so that it is all more flexible. It is supposed to remain
4085 backwards compatible. Also added extra_local_interfaces.
4087 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4088 to bomb out with an assertion failure - to the client this appears as a
4089 connection drop. This problem occurs in the part of the code that was taken
4090 from the Samba project. Fortunately, the assertion is in a very simple
4091 function, so I have fixed this by reproducing the function inline in the
4092 one place where it is called, and arranging for authentication to fail
4093 instead of killing the process with assert().
4095 75. The SPA client code was not working when the server requested OEM rather
4096 than Unicode encoding.
4098 76. Added code to make require_files with a specific uid setting more usable in
4099 the case where statting the file as root fails - usually a non-root-mounted
4100 NFS file system. When this happens and the failure is EACCES, Exim now
4101 forks a subprocess and does the per-uid checking as the relevant uid.
4103 77. Added process_log_path.
4105 78. If log_file_path was not explicitly set, a setting of check_log_space or
4106 check_log_inodes was ignored.
4108 79. If a space check for the spool or log partitions fails, the incident is now
4109 logged. Of course, in the latter case the data may get lost...
4111 80. Added the %p formatting code to string_format() so that it can be used to
4112 print addresses in debug_print(). Adjusted all the address printing in the
4113 debugging in store.c to use %p rather than %d.
4115 81. There was a concern that a line of code in smtp_in.c could overflow a
4116 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4117 initially expressed, the concern was not well-founded, because trailing
4118 spaces are removed early. However, if the trailing spaces were followed by
4119 a NULL, they did not get removed, so the overflow was possible. Two fixes
4122 (a) I re-wrote the offending code in a cleaner fashion.
4123 (b) If an incoming SMTP command contains a NULL character, it is rejected
4126 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4127 runs initgroups(), so that if the Exim user is in any additional groups,
4128 they will be used during message reception.
4134 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob