1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.248 2005/10/12 10:07:00 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 Two changes to the default runtime configuration:
11 (1) Move the checks for relay_from_hosts and authenticated clients from
12 after to before the (commented out) DNS black list checks.
14 (2) Add control=submission to the relay_from_hosts and authenticated
15 clients checks, on the grounds that messages accepted by these
16 statements are most likely to be submissions.
18 PH/02 Generate an error if the third argument for the ${prvs expansion is not
25 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
26 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
29 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
30 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
32 PH/03 Typo: missing ".o" in src/pcre/Makefile.
34 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
35 header line, restrict the check to what is listed in RFCs 2369 and 2929.
36 Also, for "Auto-Submitted", treat anything other than "no" as
37 non-personal, in accordance with RFC 3834. (Previously it treated
38 anything starting "auto-" as non-personal.)
40 TF/01 The control=submission/name=... option had a problem with syntax
41 errors if the name included a slash character. The /name= option
42 now slurps the rest of the string, so it can include any characters
43 but it must come last in the list of options (after /sender_retain
46 PH/05 Some modifications to the interface to the fake nameserver for the new
53 TK/01 Added the "success_on_redirect" address verification option. See
54 NewStuff for rationale and an example.
56 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
58 PH/02 Patch to exigrep to allow it to work on syslog lines.
60 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
61 fread() to skip over the body file's header line, because in Cygwin the
62 header line is locked and is inaccessible.
64 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
65 co-exist for some time) to make it clear that it is the Exim ID that is
66 referenced, not the Message-ID: header line.
68 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
69 string_format() function, because snprintf() does not exist on all
72 PH/06 The use of forbid_filter_existstest now also locks out the use of the
73 ${stat: expansion item.
75 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
76 protocol synchronization error", to keep the pedants happy.
78 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
79 well as for IRIX systems, when gcc is being used. See the host.c source
82 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
84 PH/10 Named domain lists were not working if used in a queue_smtp_domains
87 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
88 transport and to the smtp transport in LMTP mode.
90 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
92 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
93 run a filter in a subprocess. This could lead to confusion in subsequent
94 lookups in the parent process. There should also be a search_tidyup() at
95 the end of the subprocess.
97 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
98 only if the host matched helo_try_verify_hosts, which caused the
99 verification to occur when the EHLO/HELO command was issued. The ACL just
100 tested the remembered result. Now, if a previous verification attempt has
101 not happened, "verify = helo" does it there and then.
103 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
105 TK/03 Fix log output including CR from clamd.
107 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
108 exist provoked a memory error which could cause a segfault.
110 PH/15 Installed PCRE 6.2
112 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
114 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
115 of the problem. Specifically, suggested +O2 rather than +O1 for the
118 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
120 PH/20 If a delivery was routed to a non-standard port by means of an SRV
121 record, the port was not correctly logged when the outgoing_port log
122 selector was set (it logged the transort's default port).
124 PH/21 Added support for host-specific ports to manualroute, queryprogram,
125 fallback_hosts, and "hosts" in the smtp transport.
127 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
128 host errors such as "Connection refused".
130 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
131 authentication with radiusclient 0.4.9:
133 - Error returned from rc_read_config was caught wrongly
134 - Username/password not passed on to radius server due to wrong length.
136 The presumption is that some radiusclient API changes for 4.51/PH/17
137 were not taken care of correctly. The code is still untested by me (my
138 Linux distribution still has 0.3.2 of radiusclient), but it was
139 contributed by a Radius user.
141 PH/24 When doing a callout, the value of $domain wasn't set correctly when
142 expanding the "port" option of the smtp transport.
144 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
145 while reading a MIME header. Thanks to Tom Hughes for a patch.
147 PH/24 Include config.h inside local_scan.h so that configuration settings are
150 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
151 that in an ACL for RCPT (for example), you can examine exactly what was
154 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
155 commands, but it was not correctly comparing the address with the actual
156 client host address. Thus, it would show the EHLO address in Received:
157 header lines when this was not necessary.
159 PH/27 Added the % operator to ${eval:}.
161 PH/28 Exim tries to create and chdir to its spool directory when it starts;
162 it should be ignoring failures (because with -C, for example, it has lost
163 privilege). It wasn't ignoring creation failures other than "already
166 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
169 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
170 because an input line was too long, either on its own, or by virtue of
171 too many continuations, the temporary file was not being removed, and the
172 return code was incorrect.
174 PH/31 Missing "BOOL" in function definition in filtertest.c.
176 PH/32 Applied Sieve patches from the maintainer.
178 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
180 PH/33 Added "verify = not_blind".
182 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
183 Local/Makefile (with some defaults set). These are used in built scripts
184 such as exicyclog, but they have never been used in the exim_install
185 script (though there are many overriding facilities there). I have
186 arranged that the exim_install script now takes note of these two
189 PH/35 Installed configuration files for Dragonfly.
191 PH/36 When a locally submitted message by a trusted user did not contain a
192 From: header, and the sender address was obtained from -f or from an SMTP
193 MAIL command, and the trusted user did not use -F to supply a sender
194 name, $originator_name was incorrectly used when constructing a From:
195 header. Furthermore, $originator_name was used for submission mode
196 messages from external hosts without From: headers in a similar way,
197 which is clearly wrong.
199 PH/37 Added control=suppress_local_fixups.
201 PH/38 When log_selector = +received_sender was set, and the addition of the
202 sender made the log line's construction buffer exactly full, or one byte
203 less than full, an overflow happened when the terminating "\n" was
206 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
207 when the result of a list match is failure because a DNS lookup failed.
209 PH/40 RM_COMMAND is now used in the building process.
211 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
212 the "build-* directories that it finds.
214 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
215 address in a domain literal was a prefix of an interface address.
217 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
218 when verifying a sender address, unless rewrite_headers is false.
220 PH/44 Wrote a long comment about why errors_to addresses are verified as
221 recipients, not senders.
223 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
224 the ratelimit ACL was added.
226 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
228 PH/46 Added extra information about PostgreSQL errors to the error string.
230 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
231 avoiding the need to install special zones in a real server. This is
232 backwards compatible; if it can't find the fake resolver, it drops back.
233 Thus, both old and new test suites can be run.
235 TF/02 Added util/ratelimit.pl
237 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
238 clock is set back in time.
240 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
241 Candler <B.Candler@pobox.com>.
243 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
244 OK for addresses that are the result of redirections.
246 PH/48 A number of further additions for the benefit of the new test suite,
247 including a fake gethostbyname() that interfaces to the fake DNS resolver
250 TF/06 The fix for widen_domains has also been applied to qualify_single and
251 search_parents which are the other dnslookup options that can cause
254 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
257 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
259 TF/07 Exim produced the error message "an SRV record indicated no SMTP
260 service" if it encountered an MX record with an empty target hostname.
261 The message is now "an MX or SRV record indicated no SMTP service".
263 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
264 if the DNS of the sending site is misconfigured. This is quite a
265 common situation. This change restores the behaviour of treating a
266 helo verification defer as a failure.
268 PH/51 If self=fail was set on a router, the bounce message did not include the
269 actual error message.
275 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
277 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
278 command itself ended in error, the underlying message about the transport
279 filter timeout was being overwritten with the pipe command error. Now the
280 underlying error message should be appended to the second error message.
282 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
284 PH/02 Reduce the amount of output that "make" produces by default. Full output
285 can still be requested.
287 PH/03 The warning log line about a condition test deferring for a "warn" verb
288 was being output only once per connection, rather than after each
289 occurrence (because it was using the same function as for successful
290 "warn" verbs). This seems wrong, so I have changed it.
292 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
293 it should not have, which might have caused a crash in the right
294 circumstances, but probably never did.
296 PH/04 Installed a modified version of Tony Finch's patch to make submission
297 mode fix the return path as well as the Sender: header line, and to
298 add a /name= option so that you can make the user's friendly name appear
301 TF/03 Added the control = fakedefer ACL modifier.
303 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
304 Mark Lowes for thorough testing.
306 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
308 TK/03 Merged latest SRS patch from Miles Wilton.
310 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
311 with the definition in sysexits.h (which is #included earlier).
312 Fortunately, Exim does not actually use EX_OK. The code used to try to
313 preserve the sysexits.h value, by assumimg that macro definitions were
314 scanned for macro replacements. I have been disabused of this notion,
315 so now the code just undefines EX_OK before #including unistd.h.
317 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
318 in the smtp transport. When a block could not be written in a single
319 write() function, the timeout was being re-applied to each part-write.
320 This seems wrong - if the receiver was accepting one byte at a time it
321 would take for ever. The timeout is now adjusted when this happens. It
322 doesn't have to be particularly precise.
324 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
325 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
327 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
328 without a domain if the check to <postmaster@domain> fails.
330 SC/01 Eximstats: added -xls and the ability to specify output files
331 (patch written by Frank Heydlauf).
333 SC/02 Eximstats: use FileHandles for outputing results.
335 SC/03 Eximstats: allow any combination of xls, txt, and html output.
337 SC/04 Eximstats: fixed display of large numbers with -nvr option
339 SC/05 Eximstats: fixed merging of reports with empty tables.
341 SC/06 Eximstats: added the -include_original_destination flag
343 SC/07 Eximstats: removed tabs and trailing whitespace.
345 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
347 TK/06 MBOX spool code: Add real "From " MBOX separator line
348 so the .eml file is really in mbox format (even though
349 most programs do not really care). Patch from Alex Miller.
351 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
352 The latter is generated from $received_to and is only set if the
353 message has one envelope recipient. SA can use these headers,
354 obviously out-of-the-box. Patch from Alex Miller.
356 PH/08 The ${def test on a variable was returning false if the variable's
357 value was "0", contrary to what the specification has always said!
358 The result should be true unless the variable is empty.
360 PH/09 The syntax error of a character other than { following "${if
361 def:variable_name" (after optional whitespace) was not being diagnosed.
362 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
363 accidental colon was present, for example, could give incorrect results.
365 PH/10 Tidied the code in a number of places where the st_size field of a stat()
366 result is used (not including appendfile, where other changes are about
369 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
370 This involved changing a lot of size variables from int to off_t. It
371 should work with maildirs and everything.
373 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
374 spamd dying while we are connected to it.
376 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
379 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
380 function for BDB 4.3.
382 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
384 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
385 the sources for PCRE have been re-arranged and more files are now
388 PH/15 The code I had for printing potentially long long variables in PH/11
389 above was not the best (it lost precision). The length of off_t variables
390 is now inspected at build time, and an appropriate printing format (%ld
391 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
392 to be "long long int" or "long int". This is needed for the internal
393 formatting function string_vformat().
395 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
396 the configuration file to be ":syslog", then the script "guesses" where
397 the logs files are, rather than using the compiled in default. In our
398 case the guess is not the same as the compiled default, so the script
399 suddenly stopped working when I started to use syslog. The patch checks
400 to see if log_file_path is "". If so, it attempts to read it from exim
401 with no configuration file to get the compiled in version, before it
402 falls back to the previous guessing code."
404 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
405 implementing BATV in an Exim configuration. See NewStuff for the gory
408 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
409 Makefile that are specific to HP-UX.
411 PH/18 If the "use_postmaster" option was set for a recipient callout together
412 with the "random" option, the postmaster address was used as the MAIL
413 FROM address for the random test, but not for the subsequent recipient
414 test. It is now used for both.
416 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
417 patch removes a few documentation additions to RFC 3028, because the
418 latest draft now contains them. It adds the new en;ascii-case comparator
419 and a new error check for 8bit text in MIME parts. Comparator and
420 require names are now matched exactly. I enabled the subaddress
421 extension, but it is not well tested yet (read: it works for me)."
423 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
424 rework some of the code of TK/09 above to avoid the hardwired use of
425 "%lld" and "long long". Replaced the call to snprintf() with a call to
428 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
429 records point to non-existent hosts", "retry timeout exceeded", and
430 "retry time not reached for any host after a long failure period".
432 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
433 experimental DomainKeys support:
435 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
436 (2) On an error such as an illegally used "control", the wrong name for
437 the control was given.
439 These problems did NOT occur unless DomainKeys support was compiled.
441 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
443 PH/24 Added ${if match_ip condition.
445 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
446 databases so that it will be absolutely obvious if a crash occurs in the
447 DB library. This is a regular occurrence (often caused by mis-matched
450 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
451 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
452 picked up on a user's system that detects such things. There doesn't seem
453 to be a gcc warning option for this - only an attribute that has to be
454 put on the function's prototype. It seems that in Fedora Core 4 they have
455 set this on a number of new functions. No doubt there will be more in due
458 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
459 specify a transport. However, if an address that was verified by such a
460 router was the subject of a callout, Exim crashed because it tried to
461 read the rcpt_include_affixes from the non-existent transport. Now it
462 just assumes that the setting of that option is false. This bug was
463 introduced by 4.51/PH/31.
465 PH/28 Changed -d+all to exclude +memory, because that information is very
466 rarely of interest, but it makes the output a lot bigger. People tend to
467 do -d+all out of habit.
469 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
470 code in os-type was giving problems when libc.so lives in lib64, like on
473 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
474 aren't the modern standard, and it seems that some systems' include files
475 don't always have them. Exim was already checking for some of the newer
476 ones like T_AAAA, and defining it itself. I've added checks for all the
477 record types that Exim uses.
479 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
480 not automatically generating a new one, as it is supposed to. This
481 prevented TLS from working. If the file did exist, but contained invalid
482 data, a new version was generated, as expected. It was only the case of a
483 non-existent file that was broken.
485 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
486 with a change in libdomainkeys > 0.64.
488 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
489 from DNS. If the selector record carries the flag, it now has
490 precedence over the domain-wide flag.
492 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
494 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
495 the use of a port name that isn't defined in /etc/services) occurred, the
496 message was deferred as in a normal delivery, and thus remained on the
497 spool, instead of being failed because of the mua_wrapper setting. This
498 is now fixed, and I tidied up some of the mua_wrapper messages at the
501 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
502 the messages in a hash of arrays rather than using individual hashes.
503 This is a bit cleaner and results in dramatic memory savings, albeit
504 at a slight CPU cost.
506 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
507 as requested by Marc Sherman.
509 SC/10 Eximstats: added histograms for user specified patterns as requested
512 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
514 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
515 fopen() in the content-scanning modules that did not already have it.
521 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
522 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
524 TK/02 Fix ACL "control" statement not being available in MIME ACL.
526 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
528 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
529 to test Sieve filters that use "vacation".
531 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
532 that changes the way the GnuTLS parameters are stored in the cache file.
533 The new format can be generated externally. For backward compatibility,
534 if the data in the cache doesn't make sense, Exim assumes it has read an
535 old-format file, and it generates new data and writes a new file. This
536 means that you can't go back to an older release without removing the
539 PH/03 A redirect router that has both "unseen" and "one_time" set does not
540 work if there are any delivery delays because "one_time" forces the
541 parent to be marked "delivered", so its unseen clone is never tried
542 again. For this reason, Exim now forbids the simultaneous setting of
545 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
546 redirected to themselves ("homonym" addresses). Read the long ChangeLog
547 entry if you want to know the details. The fix, however, neglected to
548 consider the case when local delivery batching is involved. The test for
549 "previously delivered" was not happening when checking to see if an
550 address could be batched with a previous (undelivered) one; under
551 certain circumstances this could lead to multiple deliveries to the same
554 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
555 in its include files, and this causes problems building Exim.
557 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
558 header_syntax) but Exim was just ignoring anything given after a slash.
559 In particular, this caused confusion with an attempt to use "verify =
560 reverse_host_lookup/defer_ok". An error is now given when options are
561 supplied for verify items that do not have them. (Maybe reverse_host_
562 lookup should have a defer_ok option, but that's a different point.)
564 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
565 defined by RFC 821) to 2048, because there were problems with some AUTH
566 commands, and RFC 1869 says the size should be increased for extended
567 SMTP commands that take arguments.
569 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
572 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
573 "unknown" error; now it says that the functionality isn't in the binary.
575 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
576 an address' error message when a string expansion fails (syntax or
577 whatever). Otherwise the password may appear in the log. Following change
578 PH/42 below, there is no longer a chance of it appearing in a bounce
581 PH/11 Installed exipick version 20050225.0 from John Jetmore.
583 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
584 of its addresses was ever tried. (Bugzilla bug #2.)
586 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
587 the result incorrectly in the debug output. (It correctly added a newline
588 to what was transported.)
590 TF/01 Added $received_time.
592 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
593 commented out examples of how to interface to a virus scanner and to
594 SpamAssassin. Also added commented examples of av_scanner and
595 spamd_address settings.
597 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
598 and controls are allowed in which ACLs. There were a couple of minor
599 errors. Some of the entries in the conditions table (which is a table of
600 where they are NOT allowed) were getting very unwieldy; rewrote them as a
601 negation of where the condition IS allowed.
603 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
605 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
606 header file does not have a version number, so I've had to invent a new
607 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
608 API. The code is untested by me (my Linux distribution still has 0.3.2 of
609 radiusclient), but it was contributed by a Radius user.
611 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
612 files or directories, for OpenSSL.
614 PH/19 When an Exim process that is running as root has to create an Exim log
615 file, it does so in a subprocess that runs as exim:exim so as to get the
616 ownership right at creation (otherwise, other Exim processes might see
617 the file with the wrong ownership). There was no test for failure of this
618 fork() call, which would lead to the process getting stuck as it waited
619 for a non-existent subprocess. Forks do occasionally fail when resources
620 run out. I reviewed all the other calls to fork(); they all seem to check
623 PH/20 When checking for unexpected SMTP input at connect time (before writing
624 the banner), Exim was not dealing correctly with a non-positive return
625 from the read() function. If the client had disconnected by this time,
626 the result was a log entry for a synchronization error with an empty
627 string after "input=" when read() returned zero. If read() returned -1
628 (an event I could not check), uninitialized data bytes were printed.
629 There were reports of junk text (parts of files, etc) appearing after
632 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
634 PH/22 Added support for macro redefinition, and (re)definition in between
635 driver and ACL definitions.
637 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
638 forgetting to use the resulting value; it was using the unexpanded value.
640 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
641 hadn't been configured. The fix is from Juergen Kreileder, who
642 understands it better than I do:
644 "Here's what I see happening with three configured cyrus_sasl
645 authenticators configured (plain, login, cram-md5):
647 On startup auth_cyrus_sasl_init() gets called for each of these.
648 This means three calls to sasl_listmech() without a specified mech_list.
649 => SASL tests which mechs of all available mechs actually work
650 => three warnings about OTP not working
651 => the returned list contains: plain, login, cram-md5, digest-md5, ...
653 With the patch, sasl_listmech() also gets called three times. But now
654 SASL's mech_list option is set to the server_mech specified in the the
655 authenticator. Or in other words, the answer from sasl_listmech()
656 gets limited to just the mech you're testing for (which is different
658 => the return list contains just 'plain' or 'login', 'cram-md5' or
659 nothing depending on the value of ob->server_mech.
661 I've just tested the patch: Authentication still works fine,
662 unavailable mechs specified in the exim configuration are still
663 caught, and the auth.log warnings about OTP are gone."
665 PH/25 When debugging is enabled, the contents of the command line are added
666 to the debugging output, even when log_selector=+arguments is not
669 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
670 answer is "GNU", and only if the return is "GNU/something" is the answer
673 PH/27 $acl_verify_message is now set immediately after the failure of a
674 verification in an ACL, and so is available in subsequent modifiers. In
675 particular, the message can be preserved by coding like this:
677 warn !verify = sender
678 set acl_m0 = $acl_verify_message
680 Previously, $acl_verify_message was set only while expanding "message"
681 and "log_message" when a very denied access.
683 PH/28 Modified OS/os.c-Linux with
685 -#ifndef OS_LOAD_AVERAGE
686 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
688 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
689 nomenclature these days.)
691 PH/29 Installed patch from the Sieve maintainer that adds the options
692 sieve_useraddress and sieve_subaddress to the redirect router.
694 PH/30 In these circumstances:
695 . Two addresses routed to the same list of hosts;
696 . First host does not offer TLS;
697 . First host accepts first address;
698 . First host gives temporary error to second address;
699 . Second host offers TLS and a TLS session is established;
700 . Second host accepts second address.
701 Exim incorrectly logged both deliveries with the TLS parameters (cipher
702 and peerdn, if requested) that were in fact used only for the second
705 PH/31 When doing a callout as part of verifying an address, Exim was not paying
706 attention to any local part prefix or suffix that was matched by the
707 router that accepted the address. It now behaves in the same way as it
708 does for delivery: the affixes are removed from the local part unless
709 rcpt_include_affixes is set on the transport.
711 PH/32 Add the sender address, as F=<...>, to the log line when logging a
712 timeout during the DATA phase of an incoming message.
714 PH/33 Sieve envelope tests were broken for match types other than :is. I have
715 applied a patch sanctioned by the Sieve maintainer.
717 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
718 the uid or gid is negative. A case of a negative gid caused this to be
719 noticed. The fix allows for either to be negative.
721 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
722 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
725 PH/36 The change PH/12 above was broken. Fixed it.
727 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
728 the grounds that routing the same address twice would always produce the
729 same answer. This might have been true once, but it is certainly no
730 longer true now. Routing a child address may depend on the previous
731 routing that produced that child. Some complicated redirection strategies
732 went wrong when messages had multiple recipients, and made Exim's
733 behaviour dependent on the order in which the addresses were given.
735 I have moved the duplicate checking until after the routing is complete.
736 Exim scans the addresses that are assigned to local and remote
737 transports, and removes any duplicates. This means that more work will be
738 done, as duplicates will always all be routed, but duplicates are
739 presumably rare, so I don't expect this is of any significance.
741 For deliveries to pipes, files, and autoreplies, the duplicate checking
742 still happens during the routing process, since they are not going to be
745 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
746 It corrects a timeout issue with spamd. This is Ian's comment: "The
747 background is that sometimes spamd either never reads data from a
748 connection it has accepted, or it never writes response data. The exiscan
749 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
750 blindly assumes that writes won't block so it may never time out."
752 PH/39 Allow G after quota size as well as K and M.
754 PH/40 The value set for $authenticated_id in an authenticator may not contain
755 binary zeroes or newlines because the value is written to log lines and
756 to spool files. There was no check on this. Now the value is run through
757 the string_printing() function so that such characters are converted to
758 printable escape sequences.
760 PH/41 $message_linecount is a new variable that contains the total number of
761 lines in the message. Compare $body_linecount, which is the count for the
764 PH/42 Exim no longer gives details of delivery errors for specific addresses in
765 bounce and delay warning messages, except in certain special cases, which
768 (a) An SMTP error message from a remote host;
769 (b) A message specified in a :fail: redirection;
770 (c) A message specified in a "fail" command in a system filter;
771 (d) A message specified in a FAIL return from the queryprogram router;
772 (e) A message specified by the cannot_route_message router option.
774 In these cases only, Exim does include the error details in bounce and
775 warning messages. There are also a few cases where bland messages such
776 as "unrouteable address" or "local delivery error" are given.
778 PH/43 $value is now also set for the "else" part of a ${run expansion.
780 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
781 being worked on, but at least Exim now implements the latest version to
784 PH/45 In a pipe transport, although a timeout while waiting for the pipe
785 process to complete was treated as a delivery failure, a timeout while
786 writing the message to the pipe was logged, but erroneously treated as a
787 successful delivery. Such timeouts include transport filter timeouts. For
788 consistency with the overall process timeout, these timeouts are now
789 treated as errors, giving rise to delivery failures by default. However,
790 there is now a new Boolean option for the pipe transport called
791 timeout_defer, which, if set TRUE, converts the failures into defers for
792 both kinds of timeout. A transport filter timeout is now identified in
795 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
796 systems where "make" and "gmake" are different, calling "gmake" at top
797 level broke things. I've arranged for the value of $(MAKE) to be passed
798 from the Makefile to this script so that it can call the same version of
802 A note about Exim versions 4.44 and 4.50
803 ----------------------------------------
805 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
806 changes of various kinds. As a consequence, a big documentation update was
807 needed. This delayed the release for rather longer than seemed good, especially
808 in the light of a couple of (minor) security issues. Therefore, the changes
809 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
810 release. So 4.44 and 4.50 are in effect two different branches that both start
813 I have left the 4.50 change log unchanged; it contains all the changes since
814 4.43. The change log for 4.44 is below; many of its items are identical to
815 those for 4.50. This seems to be the most sensible way to preserve the
816 historical information.
822 1. Minor wording change to the doc/README.SIEVE file.
824 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
825 computation of the current number of files was incorrect.
827 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
828 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
831 4. Give more explanation in the error message when the command for a transport
832 filter fails to execute.
834 5. There are several places where Exim runs a non-Exim command in a
835 subprocess. The SIGUSR1 signal should be disabled for these processes. This
836 was being done only for the command run by the queryprogram router. It is
837 now done for all such subprocesses. The other cases are: ${run, transport
838 filters, and the commands run by the lmtp and pipe transports.
840 6. Added CONFIGURE_GROUP build-time option.
842 7. Some older OS have a limit of 256 on the maximum number of file
843 descriptors. Exim was using setrlimit() to set 1000 as a large value
844 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
845 systems. I've change it so that if it can't get 1000, it tries for 256.
847 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
848 was an oversight, and furthermore, ever since the addition of extra
849 controls (e.g. 4.43/32), the checks on when to allow different forms of
850 "control" were broken. There should now be diagnostics for all cases when a
851 control that does not make sense is encountered.
853 9. Added the /retain_sender option to "control=submission".
855 10. $recipients is now available in the predata ACL (oversight).
857 11. Tidy the search cache before the fork to do a delivery from a message
858 received from the command line. Otherwise the child will trigger a lookup
859 failure and thereby defer the delivery if it tries to use (for example) a
860 cached ldap connection that the parent has called unbind on.
862 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
863 of $address_data from the recipient verification was clobbered by the
866 13. The value of address_data from a sender verification is now available in
867 $sender_address_data in subsequent conditions in the ACL statement.
869 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
871 15. Added a new option "connect=<time>" to callout options, to set a different
874 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
875 was its contents. (It was OK if the option was not defined at all.)
877 17. A "Completed" log line is now written for messages that are removed from
878 the spool by the -Mrm option.
880 18. New variables $sender_verify_failure and $recipient_verify_failure contain
881 information about exactly what failed.
883 19. Added -dd to debug only the daemon process.
885 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
886 handles timeouts, both on the server side and network timeouts. Renamed the
887 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
889 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
890 It is now set to "smtps".
892 22. $host_address is now set to the target address during the checking of
895 23. When checking ignore_target_hosts for an ipliteral router, no host name was
896 being passed; this would have caused $sender_host_name to have been used if
897 matching the list had actually called for a host name (not very likely,
898 since this list is usually IP addresses). A host name is now passed as
901 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
902 code that specifies a non-restarting handler (typically sigaction() in
903 modern systems) in an attempt to fix a rare and obscure crash bug.
905 25. Narrowed the window for a race in the daemon that could cause it to ignore
906 SIGCHLD signals. This is not a major problem, because they are used only to
907 wake it up if nothing else does.
909 26. A malformed maildirsize file could cause Exim to calculate negative values
910 for the mailbox size or file count. Odd effects could occur as a result.
911 The maildirsize information is now recalculated if the size or filecount
914 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
915 support for a long time. Removed HAVE_SYS_VFS_H.
917 28. Installed the latest version of exipick from John Jetmore.
919 29. In an address list, if the pattern was not a regular expression, an empty
920 subject address (from a bounce message) matched only if the pattern was an
921 empty string. Non-empty patterns were not even tested. This was the wrong
922 because it is perfectly reasonable to use an empty address as part of a
923 database query. An empty address is now tested by patterns that are
924 lookups. However, all the other forms of pattern expect the subject to
925 contain a local part and a domain, and therefore, for them, an empty
926 address still always fails if the pattern is not itself empty.
928 30. Exim went into a mad DNS loop when attempting to do a callout where the
929 host was specified on an smtp transport, and looking it up yielded more
932 31. Re-factored the code for checking spool and log partition space into a
933 function that finds that data and another that does the check. The former
934 is then used to implement four new variables: $spool_space, $log_space,
935 $spool_inodes, and $log_inodes.
937 32. The RFC2047 encoding function was originally intended for short strings
938 such as real names; it was not keeping to the 75-character limit for
939 encoded words that the RFC imposes. It now respects the limit, and
940 generates multiple encoded words if necessary. To be on the safe side, I
941 have increased the buffer size for the ${rfc2047: expansion operator from
944 33. It is now permitted to omit both strings after an "if" condition; if the
945 condition is true, the result is "true". As before, when the second string
946 is omitted, a false condition yields an empty string. This makes it less
947 cumbersome to write custom ACL and router conditions.
949 34. Failure to deliver a bounce message always caused it to be frozen, even if
950 there was an errors_to setting on the router. The errors_to setting is now
953 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
954 canonical form (fully expanded) before being placed in
955 $sender_host_address.
957 36. The table in the code that translates DNS record types into text (T_A to
958 "A" for instance) was missing entries for NS and CNAME. It is just possible
959 that this could have caused confusion if both these types were looked up
960 for the same domain, because the text type is used as part of Exim's
961 per-process caching. But the chance of anyone hitting this buglet seems
964 37. The dnsdb lookup has been extended in a number of ways.
966 (1) There is a new type, "zns", which walks up the domain tree until it
967 finds some nameserver records. It should be used with care.
969 (2) There is a new type, "mxh", which is like "mx" except that it returns
970 just the host names, not the priorities.
972 (3) It is now possible to give a list of domains (or IP addresses) to be
973 looked up. The behaviour when one of the lookups defers can be
974 controlled by a keyword.
976 (4) It is now possible to specify the separator character for use when
977 multiple records are returned.
979 38. The dnslists ACL condition has been extended: it is now possible to supply
980 a list of IP addresses and/or domains to be looked up in a particular DNS
983 39. Added log_selector=+queue_time_overall.
985 40. When running the queue in the test harness, wait just a tad after forking a
986 delivery process, to get repeatability of debugging output.
988 41. Include certificate and key file names in error message when GnuTLS fails
989 to set them up, because the GnuTLS error message doesn't include the name
990 of the failing file when there is a problem reading it.
992 42. Allow both -bf and -bF in the same test run.
994 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
996 44. The "Exiscan patch" is now merged into the mainline Exim source.
998 45. Sometimes the final signoff response after QUIT could fail to get
999 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1000 < 0 before doing a fflush(). This bug looks as though it goes back to the
1001 introduction of TLS in release 3.20, but "sometimes" must have been rare
1002 because the tests only now provoked it.
1004 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1005 (this can affect the format of dates).
1007 47. exim_tidydb, when checking for the continued existence of a message for
1008 which it has found a message-specific retry record, was not finding
1009 messages that were in split spool directories. Consequently, it was
1010 deleting retry records that should have stayed in existence.
1012 48. Steve fixed some bugs in eximstats.
1014 49. The SPA authentication driver was not abandoning authentication and moving
1015 on to the next authenticator when an expansion was forced to fail,
1016 contradicting the general specification for all authenticators. Instead it
1017 was generating a temporary error. It now behaves as specified.
1019 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1020 (the order specifies the preference for clients). The order is now AES256,
1021 AES128, 3DES, ARCFOUR128.
1023 51. Small patch to Sieve code - explicitly set From: when generating an
1026 52. Exim crashed if a remote delivery caused a very long error message to be
1027 recorded - for instance if somebody sent an entire SpamAssassin report back
1028 as a large number of 550 error lines. This bug was coincidentally fixed by
1029 increasing the size of one of Exim's internal buffers (big_buffer) that
1030 happened as part of the Exiscan merge. However, to be on the safe side, I
1031 have made the code more robust (and fixed the comments that describe what
1034 53. Now that there can be additional text after "Completed" in log lines (if
1035 the queue_time_overall log selector is set), a one-byte patch to exigrep
1036 was needed to allow it to recognize "Completed" as not the last thing in
1039 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1040 patch that reportedly fixes this has been added. I am not expert enough to
1041 create a test for it. This is what the patch creator wrote:
1043 "I found a little strange behaviour of ldap code when working with
1044 Windows 2003 AD Domain, where users was placed in more than one
1045 Organization Units. When I tried to give exim partial DN, the exit code
1046 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1047 But simultaneously result of request was absolutely normal ldap result,
1048 so I produce this patch..."
1050 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1051 REFERENCE, so I have modified the code to exclude the patch when that macro
1054 55. Some experimental protocols are using DNS PTR records for new purposes. The
1055 keys for these records are domain names, not reversed IP addresses. The
1056 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1057 leaves it alone. Component reversal etc. now happens only for IP addresses.
1060 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1062 57. Double the size of the debug message buffer (to 2048) so that more of very
1063 long debug lines gets shown.
1065 58. The exicyclog utility now does better if the number of log files to keep
1066 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1068 59. Two changes related to the smtp_active_hostname option:
1070 (1) $smtp_active_hostname is now available as a variable.
1071 (2) The default for smtp_banner uses $smtp_active_hostname instead
1072 of $primary_hostname.
1074 60. The host_aton() function is supposed to be passed a string that is known
1075 to be a valid IP address. However, in the case of IPv6 addresses, it was
1076 not checking this. This is a hostage to fortune. Exim now panics and dies
1077 if the condition is not met. A case was found where this could be provoked
1078 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1079 components; fortuitously, this particular loophole had already been fixed
1080 by change 4.50/55 above.
1082 If there are any other similar loopholes, the new check in host_aton()
1083 itself should stop them being exploited. The report I received stated that
1084 data on the command line could provoke the exploit when Exim was running as
1085 exim, but did not say which command line option was involved. All I could
1086 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1087 running as the user.
1090 61. There was a buffer overflow vulnerability in the SPA authentication code
1091 (which came originally from the Samba project). I have added a test to the
1092 spa_base64_to_bits() function which I hope fixes it.
1095 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1096 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1098 63. The daemon start-up calls getloadavg() while still root for those OS that
1099 need the first call to be done as root, but it missed one case: when
1100 deliver_queue_load_max is set with deliver_drop_privilege. This is
1101 necessary for the benefit of the queue runner, because there is no re-exec
1102 when deliver_drop_privilege is set.
1104 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1105 This has been fixed.
1107 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1108 was in use, was not putting the data itself into the right store pool;
1109 consequently, it could be overwritten for a subsequent message in the same
1110 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1113 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1115 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1116 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1117 the function were treating the return as a boolean value, which happened to
1118 work because 0=false and not-0=true, but is not correct code.
1120 68. The host_aton() function was not handling scoped IPv6 addresses (those
1121 with, for example, "%eth0" on the end) correctly.
1123 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1124 negated items (that is, ~something) in unsigned ints. Some compilers
1125 apparently mutter when there is no cast.
1127 70. If an address verification called from an ACL failed, and did not produce a
1128 user-specific message (i.e. there was only a "system" message), nothing was
1129 put in $acl_verify_message. In this situation, it now puts the system
1132 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1133 session; change 4.31/43 added the unwanted input to the log line - except
1134 that it did not do this in the start of session case. It now does.
1136 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1137 This is wrong and can cause the other end to generate a synchronization
1138 error if it is another Exim or anything else that does the synchronization
1139 check. A QUIT command is no longer sent after a timeout.
1141 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1142 during host lookups.
1144 74. The defer_ok option of callout verification was not working if it was used
1145 when verifying addresses in header lines, that is, for this case:
1147 verify = header_sender/callout=defer_ok
1149 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1150 those file descriptors could be used for SMTP connections. If anything
1151 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1152 could be sent to the SMTP client, causing chaos. The daemon now opens
1153 stdin, stdout, and stderr to /dev/null when it puts itself into the
1156 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1157 log by default. The user can override this with suitable Perl magic.
1159 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1160 the log message when discard triggers, was not working for the DATA ACL or
1161 for the non-SMTP ACL.
1163 78. Error message wording change in sieve.c.
1165 79. If smtp_accept_max_per_host was set, the number of connections could be
1166 restricted to fewer than expected, because the daemon was trying to set up
1167 a new connection before checking whether the processes handling previous
1168 connections had finished. The check for completed processes is now done
1169 earlier. On busy systems, this bug wouldn't be noticed because something
1170 else would have woken the daemon, and it would have reaped the completed
1173 80. If a message was submitted locally by a user whose login name contained one
1174 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1175 It caused a spool format error. I have fixed the spool reading code. A
1176 related problem was that the "from" clause in the Received: line became
1177 illegal because of the space(s). It is now covered by ${quote_local_part.
1179 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1182 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1184 83. Patch from Sieve maintainer to fix unterminated string problem in
1185 "vacation" handling.
1187 84. Some minor changes to the Linux configuration files to help with other
1188 OS variants using glibc.
1190 85. One more patch for Sieve to update vacation handling to latest spec.
1193 ----------------------------------------------------
1194 See the note above about the 4.44 and 4.50 releases.
1195 ----------------------------------------------------
1201 1. Change 4.43/35 introduced a bug that caused file counts to be
1202 incorrectly computed when quota_filecount was set in an appendfile
1205 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1206 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1209 3. Give more explanation in the error message when the command for a transport
1210 filter fails to execute.
1212 4. There are several places where Exim runs a non-Exim command in a
1213 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1214 was being done only for the command run by the queryprogram router. It is
1215 now done for all such subprocesses. The other cases are: ${run, transport
1216 filters, and the commands run by the lmtp and pipe transports.
1218 5. Some older OS have a limit of 256 on the maximum number of file
1219 descriptors. Exim was using setrlimit() to set 1000 as a large value
1220 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1221 systems. I've change it so that if it can't get 1000, it tries for 256.
1223 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1224 was an oversight, and furthermore, ever since the addition of extra
1225 controls (e.g. 4.43/32), the checks on when to allow different forms of
1226 "control" were broken. There should now be diagnostics for all cases when a
1227 control that does not make sense is encountered.
1229 7. $recipients is now available in the predata ACL (oversight).
1231 8. Tidy the search cache before the fork to do a delivery from a message
1232 received from the command line. Otherwise the child will trigger a lookup
1233 failure and thereby defer the delivery if it tries to use (for example) a
1234 cached ldap connection that the parent has called unbind on.
1236 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1237 of $address_data from the recipient verification was clobbered by the
1238 sender verification.
1240 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1241 was its contents. (It was OK if the option was not defined at all.)
1243 11. A "Completed" log line is now written for messages that are removed from
1244 the spool by the -Mrm option.
1246 12. $host_address is now set to the target address during the checking of
1247 ignore_target_hosts.
1249 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1250 being passed; this would have caused $sender_host_name to have been used if
1251 matching the list had actually called for a host name (not very likely,
1252 since this list is usually IP addresses). A host name is now passed as
1255 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1256 code that specifies a non-restarting handler (typically sigaction() in
1257 modern systems) in an attempt to fix a rare and obscure crash bug.
1259 15. Narrowed the window for a race in the daemon that could cause it to ignore
1260 SIGCHLD signals. This is not a major problem, because they are used only to
1261 wake it up if nothing else does.
1263 16. A malformed maildirsize file could cause Exim to calculate negative values
1264 for the mailbox size or file count. Odd effects could occur as a result.
1265 The maildirsize information is now recalculated if the size or filecount
1268 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1269 support for a long time. Removed HAVE_SYS_VFS_H.
1271 18. Updated exipick to current release from John Jetmore.
1273 19. Allow an empty sender to be matched against a lookup in an address list.
1274 Previously the only cases considered were a regular expression, or an
1277 20. Exim went into a mad DNS lookup loop when doing a callout where the
1278 host was specified on the transport, if the DNS lookup yielded more than
1281 21. The RFC2047 encoding function was originally intended for short strings
1282 such as real names; it was not keeping to the 75-character limit for
1283 encoded words that the RFC imposes. It now respects the limit, and
1284 generates multiple encoded words if necessary. To be on the safe side, I
1285 have increased the buffer size for the ${rfc2047: expansion operator from
1288 22. Failure to deliver a bounce message always caused it to be frozen, even if
1289 there was an errors_to setting on the router. The errors_to setting is now
1292 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1293 canonical form (fully expanded) before being placed in
1294 $sender_host_address.
1296 24. Updated eximstats to version 1.33
1298 25. Include certificate and key file names in error message when GnuTLS fails
1299 to set them up, because the GnuTLS error message doesn't include the name
1300 of the failing file when there is a problem reading it.
1302 26. Expand error message when OpenSSL has problems setting up cert/key files.
1305 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1306 (this can affect the format of dates).
1308 28. exim_tidydb, when checking for the continued existence of a message for
1309 which it has found a message-specific retry record, was not finding
1310 messages that were in split spool directories. Consequently, it was
1311 deleting retry records that should have stayed in existence.
1313 29. eximstats updated to version 1.35
1314 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1315 1.35 - bugfix such that pie charts by volume are generated correctly
1317 30. The SPA authentication driver was not abandoning authentication and moving
1318 on to the next authenticator when an expansion was forced to fail,
1319 contradicting the general specification for all authenticators. Instead it
1320 was generating a temporary error. It now behaves as specified.
1322 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1323 (the order specifies the preference for clients). The order is now AES256,
1324 AES128, 3DES, ARCFOUR128.
1326 31. Small patch to Sieve code - explicitly set From: when generating an
1329 32. Exim crashed if a remote delivery caused a very long error message to be
1330 recorded - for instance if somebody sent an entire SpamAssassin report back
1331 as a large number of 550 error lines. This bug was coincidentally fixed by
1332 increasing the size of one of Exim's internal buffers (big_buffer) that
1333 happened as part of the Exiscan merge. However, to be on the safe side, I
1334 have made the code more robust (and fixed the comments that describe what
1337 33. Some experimental protocols are using DNS PTR records for new purposes. The
1338 keys for these records are domain names, not reversed IP addresses. The
1339 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1340 leaves it alone. Component reversal etc. now happens only for IP addresses.
1343 34. The host_aton() function is supposed to be passed a string that is known
1344 to be a valid IP address. However, in the case of IPv6 addresses, it was
1345 not checking this. This is a hostage to fortune. Exim now panics and dies
1346 if the condition is not met. A case was found where this could be provoked
1347 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1348 components; fortuitously, this particular loophole had already been fixed
1349 by change 4.50/55 or 4.44/33 above.
1351 If there are any other similar loopholes, the new check in host_aton()
1352 itself should stop them being exploited. The report I received stated that
1353 data on the command line could provoke the exploit when Exim was running as
1354 exim, but did not say which command line option was involved. All I could
1355 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1356 running as the user.
1359 35. There was a buffer overflow vulnerability in the SPA authentication code
1360 (which came originally from the Samba project). I have added a test to the
1361 spa_base64_to_bits() function which I hope fixes it.
1364 36. The daemon start-up calls getloadavg() while still root for those OS that
1365 need the first call to be done as root, but it missed one case: when
1366 deliver_queue_load_max is set with deliver_drop_privilege. This is
1367 necessary for the benefit of the queue runner, because there is no re-exec
1368 when deliver_drop_privilege is set.
1370 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1371 was in use, was not putting the data itself into the right store pool;
1372 consequently, it could be overwritten for a subsequent message in the same
1373 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1376 38. Sometimes the final signoff response after QUIT could fail to get
1377 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1378 < 0 before doing a fflush(). This bug looks as though it goes back to the
1379 introduction of TLS in release 3.20, but "sometimes" must have been rare
1380 because the tests only now provoked it.
1386 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1387 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1388 Now it returns an integer. A number of calls were still expecting a T/F
1389 return. Fortuitously, in all cases, the tests worked in OK situations,
1390 which is the norm. However, things would have gone wrong on any write
1391 failures on the smtp file descriptor. This function is used when sending
1392 messages over SMTP and also when doing verify callouts.
1394 2. When Exim is called to do synchronous delivery of a locally submitted
1395 message (the -odf or -odi options), it no longer closes stderr before doing
1398 3. Implemented the mua_wrapper option.
1400 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1402 5. Implemented the functions header_remove(), header_testname(),
1403 header_add_at_position(), and receive_remove_recipient(), and exported them
1406 6. If an ACL "warn" statement specified the addition of headers, Exim already
1407 inserted X-ACL-Warn: at the start if there was no header name. However, it
1408 was not making this test for the second and subsequent header lines if
1409 there were newlines in the string. This meant that an invalid header could
1410 be inserted if Exim was badly configured.
1412 7. Allow an ACL "warn" statement to add header lines at the start or after all
1413 the Received: headers, as well as at the end.
1415 8. Added the rcpt_4xx retry error code.
1417 9. Added postmaster_mailfrom=xxx to callout verification option.
1419 10. Added mailfrom=xxxx to the callout verification option, for verify=
1422 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1423 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1425 12. Inserted some casts to stop certain compilers warning when using pointer
1426 differences as field lengths or precisions in printf-type calls (mostly
1427 affecting debugging statements).
1429 13. Added optional readline() support for -be (dynamically loaded).
1431 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1432 same clock tick as a message's arrival, so that its received time was the
1433 same as the "first fail" time on the retry record, and that message
1434 remained on the queue past the ultimate address timeout, every queue runner
1435 would try a delivery (because it was past the ultimate address timeout) but
1436 after another failure, the ultimate address timeout, which should have then
1437 bounced the address, did not kick in. This was a "< instead of <=" error;
1438 in most cases the first failure would have been in the next clock tick
1439 after the received time, and all would be well.
1441 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1442 being recognized when the domain list was tested by the match_domain
1443 condition in an expansion string.
1445 16. Added the ${str2b64: operator.
1447 17. Exim was always calling setrlimit() to set a large limit for the number of
1448 processes, without checking whether the existing limit was already
1449 adequate. (It did check for the limit on file descriptors.) Furthermore,
1450 errors from getrlimit() and setrlimit() were being ignored. Now they are
1451 logged to the main and panic logs, but Exim does carry on, to try to do its
1452 job under whatever limits there are.
1454 18. Imported PCRE 5.0.
1456 19. Trivial typo in log message " temporarily refused connection" (the leading
1459 20. If the log selector return_path_on_delivery was set and an address was
1460 redirected to /dev/null, the delivery process crashed because it assumed
1461 that a return path would always be set for a "successful" delivery. In this
1462 case, the whole delivery is bypassed as an optimization, and therefore no
1465 21. Internal re-arrangement: the function for sending a challenge and reading
1466 a response while authentication was assuming a zero-terminated challenge
1467 string. It's now changed to take a pointer and a length, to allow for
1468 binary data in such strings.
1470 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1472 23. Exim was not respecting finduser_retries when seeking the login of the
1473 uid under which it was called; it was always trying 10 times. (The default
1474 setting of finduser_retries is zero.) Also, it was sleeping after the final
1475 failure, which is pointless.
1477 24. Implemented tls_on_connect_ports.
1479 25. Implemented acl_smtp_predata.
1481 26. If the domain in control=submission is set empty, Exim assumes that the
1482 authenticated id is a complete email address when it generates From: or
1483 Sender: header lines.
1485 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1486 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1487 chown and chgrp in /bin and hostname in /usr/bin.
1489 28. Exim was keeping the "process log" file open after each use, just as it
1490 does for the main log. This opens the possibility of it remaining open for
1491 long periods when the USR1 signal hits a daemon. Occasional processlog
1492 errors were reported, that could have been caused by this. Anyway, it seems
1493 much more sensible not to leave this file open at all, so that is what now
1496 29. The long-running daemon process does not normally write to the log once it
1497 has entered its main loop, and it closes the log before doing so. This is
1498 so that log files can straightforwardly be renamed and moved. However,
1499 there are a couple of unusual error situations where the daemon does write
1500 log entries, and I had neglected to close the log afterwards.
1502 30. The text of an SMTP error response that was received during a remote
1503 delivery was being truncated at 512 bytes. This is too short for some of
1504 the long messages that one sometimes sees. I've increased the limit to
1507 31. It is now possible to make retry rules that apply only when a message has a
1508 specific sender, in particular, an empty sender.
1510 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1511 it possible to be selective about when SMTP synchronization is enforced.
1513 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1515 32. Implemented hosts_connection_nolog.
1517 33. Added an ACL for QUIT.
1519 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1522 35. Added mailbox_size and mailbox_filecount to appendfile.
1524 36. Added control = no_multiline_responses to ACLs.
1526 37. There was a bug in the logic of the code that waits for the clock to tick
1527 in the case where the clock went backwards by a substantial amount such
1528 that the microsecond fraction of "now" was more than the microsecond
1529 fraction of "then" (but the whole seconds number was less).
1531 38. Added support for the libradius Radius client library this is found on
1532 FreeBSD (previously only the radiusclient library was supported).
1538 1. When certain lookups returned multiple values in the form name=value, the
1539 quoting of the values was not always being done properly. Specifically:
1540 (a) If the value started with a double quote, but contained no whitespace,
1542 (b) If the value contained whitespace other than a space character (i.e.
1543 tabs or newlines or carriage returns) it was not quoted.
1544 This fix has been applied to the mysql and pgsql lookups by writing a
1545 separate quoting function and calling it from the lookup code. The fix
1546 should probably also be applied to nisplus, ibase and oracle lookups, but
1547 since I cannot test any of those, I have not disturbed their existing code.
1549 2. A hit in the callout cache for a specific address caused a log line with no
1550 reason for rejecting RCPT. Now it says "Previous (cached) callout
1551 verification failure".
1553 3. There was an off-by-one bug in the queryprogram router. An over-long
1554 return line was truncated at 256 instead of 255 characters, thereby
1555 overflowing its buffer with the terminating zero. As well as fixing this, I
1556 have increased the buffer size to 1024 (and made a note to document this).
1558 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1559 when Exim is waiting for an SMTP response from a remote server, Exim
1560 restarts its select() call on the socket, thereby resetting its timeout.
1561 This is not a problem when such interrupts are rare. Somebody set up a cron
1562 job to run exiwhat every 2 minutes, which is less than the normal select()
1563 timeout (5 or 10 minutes). This meant that the select() timeout never
1564 kicked in because it was always reset. I have fixed this by comparing the
1565 time when an interrupt arrives with the time at the start of the first call
1566 to select(). If more time than the timeout has elapsed, the interrupt is
1567 treated as a timeout.
1569 5. Some internal re-factoring in preparation for the addition of Sieve
1570 extensions (by MH). In particular, the "personal" test is moved to a
1571 separate function, and given an option for scanning Cc: and Bcc: (which is
1572 not set for Exim filters).
1574 6. When Exim created an email address using the login of the caller as the
1575 local part (e.g. when creating a From: or Sender: header line), it was not
1576 quoting the local part when it contained special characters such as @.
1578 7. Installed new OpenBSD configuration files.
1580 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1581 try to make them clearer.
1583 9. Callout options, other than the timeout value, were being ignored when
1584 verifying sender addresses in header lines. For example, when using
1586 verify = header_sender/callout=no_cache
1588 the cache was (incorrectly) being used.
1590 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1591 only the Cygwin environment.
1593 11. When return_path_on_delivery was set as a log selector, if different remote
1594 addresses in the same message used different return paths and parallel
1595 remote delivery occurred, the wrong values would sometimes be logged.
1596 (Whenever a remote delivery process finished, the return path value from
1597 the most recently started remote delivery process was logged.)
1599 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1600 lines when AUTH and/or TLS are in use. This is the "received protocol"
1601 field. Exim used to use "asmtp" for authenticated SMTP, without any
1602 indication (in the protocol name) for TLS use. Now it follows the RFC and
1603 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1604 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1605 names appear in log lines as well as in Received: header lines.
1607 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1608 extensions, and comparison tests, and to fix some bugs.
1610 14. Changes to the "personal" filter test:
1612 (1) The test was buggy in that it was just doing the equivalent of
1613 "contains" tests on header lines. For example, if a user's address was
1614 anne@some.where, the "personal" test would incorrectly be true for
1616 To: susanne@some.where
1618 This test is now done by extracting each address from the header in turn,
1619 and checking the entire address. Other tests that are part of "personal"
1620 are now done using regular expressions (for example, to check local parts
1621 of addresses in From: header lines).
1623 (2) The list of non-personal local parts in From: addresses has been
1624 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1625 taken from the Sieve specification recommendations.
1627 (3) If the message contains any header line starting with "List-" it is
1628 treated as non-personal.
1630 (4) The test for "circular" in the Subject: header line has been removed
1631 because it now seems ill-conceived.
1633 15. Minor typos in src/EDITME comments corrected.
1635 16. Installed latest exipick from John Jetmore.
1637 17. If headers_add on a router specified a text string that was too long for
1638 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1639 of string_sprintf() is now avoided.
1641 18. $message_body_size was not set (it was always zero) when running the DATA
1642 ACL and the local_scan() function.
1644 19. For the "mail" command in an Exim filter, no default was being set for
1645 the once_repeat time, causing a random time value to be used if "once" was
1646 specified. (If the value happened to be <= 0, no repeat happened.) The
1647 default is now 0s, meaning "never repeat". The "vacation" command was OK
1648 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1649 (I found it when inspecting the code).
1651 20. There is now an overall timeout for performing a callout verification. It
1652 defaults to 4 times the callout timeout, which applies to individual SMTP
1653 commands during the callout. The overall timeout applies when there is more
1654 than one host that can be tried. The timeout is checked before trying the
1655 next host. This prevents very long delays if there are a large number of
1656 hosts and all are timing out (e.g. when the network connections are timing
1657 out). The value of the overall timeout can be changed by specifying an
1658 additional sub-option for "callout", called "maxwait". For example:
1660 verify = sender/callout=5s,maxwait=20s
1662 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1663 to the end before writing, but this should make it even safer).
1665 22. Exim was forgetting that it had advertised PIPELINING for the second and
1666 subsequent messages on an SMTP connection. It was also not resetting its
1667 memory on STARTTLS and an internal HELO.
1669 23. When Exim logs an SMTP synchronization error within a session, it now
1670 records whether PIPELINING has been advertised or not.
1672 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1673 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1674 rather than long int.
1676 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1678 26. Added the never_mail option to autoreply.
1684 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1685 crash if the getsockname() call failed; this can happen if a connection is
1686 closed very soon after it is established. The problem was simply in the
1687 order in which certain operations were done, causing Exim to try to write
1688 to the SMTP stream before it had set up the file descriptor. The bug has
1689 been fixed by making things happen in the correct order.
1695 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1696 before the connection was closed, thus losing the rejection response.
1698 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1699 some early Solaris releases, but causes trouble in current releases where
1700 socklen_t is defined.
1702 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1705 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1708 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1709 that releasing the top of it at the end releases what was used for sub-
1710 expansions (unless the block got too big). However, discard this block if
1711 the first thing is a variable or header, so that we can use its block when
1712 it is dynamic (useful for very large $message_headers, for example).
1714 6. Lookups now cache *every* query, not just the most recent. A new, separate
1715 store pool is used for this. It can be recovered when all lookup caches are
1716 flushed. Lookups now release memory at the end of their result strings.
1717 This has involved some general refactoring of the lookup sources.
1719 7. Some code has been added to the store_xxx() functions to reduce the amount
1720 of flapping under certain conditions.
1722 8. log_incoming_interface used to affect only the <= reception log lines. Now
1723 it causes the local interface and port to be added to several more SMTP log
1724 lines, for example "SMTP connection from", and rejection lines.
1726 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1728 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1730 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1731 could be overwritten at the end of the current message (or the start of a
1732 new message if it was set in a HELO ACL). The value is now preserved for
1733 the duration of the SMTP connection.
1735 12. If a transport had a headers_rewrite setting, and a matching header line
1736 contained an unqualified address, that address was qualified, even if it
1737 did not match any rewriting rules. The underlying bug was that the values
1738 of the flags that permit the existence of unqualified sender and recipient
1739 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1740 non-local messages, and by -bnq for local messages) were not being
1741 preserved with the message after it was received.
1743 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1744 "next input=" as part of the text comprising the host identity instead of
1745 the correct text. The code was using the same buffer for two different
1746 strings. However, depending on which order the printing function evaluated
1747 its arguments, the bug did not always show up. Under Linux, for example, my
1748 test suite worked just fine.
1750 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1751 doesn't work with some older versions of Perl. It has been changed to "my",
1752 which in any case is probably the better facility to use.
1754 15. A really picky compiler found some instances of statements for creating
1755 error messages that either had too many or two few arguments for the format
1758 16. The size of the buffer for calls to the DNS resolver has been increased
1759 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1760 for addresses that have a lot of PTR records. This alleviates a problem; it
1761 does not fully solve it.
1763 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1764 buffer now truncates the list and logs the incident, which is the same
1765 action as happens when Exim is looking up a host name and its aliases.
1766 Previously in this situation something unpredictable would happen;
1767 sometimes it was "internal error: store_reset failed".
1769 18. If a server dropped the connection unexpectedly when an Exim client was
1770 using GnuTLS and trying to read a response, the client delivery process
1771 crashed while trying to generate an error log message.
1773 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1774 string, for example:
1776 warn message = H1: something\nH2: something
1778 the text was added as a single header line from Exim's point of view
1779 though it ended up OK in the delivered message. However, searching for the
1780 second and subsequent header lines using $h_h2: did not work. This has been
1781 fixed. Similarly, if a system filter added multiple headers in this way,
1782 the routers could not see them.
1784 20. Expanded the error message when iplsearch is called with an invalid key to
1785 suggest using net-iplsearch in a host list.
1787 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1788 ACLs are no longer actually imposed (and a message to that effect is
1791 22. If a "gecos" field in a passwd entry contained escaped characters, in
1792 particular, if it contained a \" sequence, Exim got it wrong when building
1793 a From: or a Sender: header from that name. A second bug also caused
1794 incorrect handling when an unquoted " was present following a character
1795 that needed quoting.
1797 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1798 was not being matched caselessly.
1800 24. Arranged for all hyphens in the exim.8 source to be escaped with
1803 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1804 properly. Recipient callout cache records were still being keyed to include
1805 the sender, even when use_sender was set false. This led to far more
1806 callouts that were necessary. The sender is no longer included in the key
1807 when use_sender is false.
1809 26. Added "control = submission" modifier to ACLs.
1811 27. Added the ${base62d: operator to decode base 62 numbers.
1813 28. dnsdb lookups can now access SRV records.
1815 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1816 the configuration file.
1818 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1819 (-v) mode. This makes the output for a verbose queue run more intelligible.
1821 31. Added a use_postmaster feature to recipient callouts.
1823 32. Added the $body_zerocount variable, containing the number of binary zero
1824 bytes in the message body.
1826 33. The time of last modification of the "new" subdirectory is now used as the
1827 "mailbox time last read" when there is a quota error for a maildir
1830 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1832 35. Added +ignore_unknown as a special item in host lists.
1834 36. Code for decoding IPv6 addresses in host lists is now included, even if
1835 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1836 address was recognized as an IP address, but was then not correctly decoded
1837 into binary, causing unexpected and incorrect effects when compared with
1844 1. Very minor rewording of debugging text in manualroute to say "list of
1845 hosts" instead of "hostlist".
1847 2. If verify=header_syntax was set, and a header line with an unqualified
1848 address (no domain) and a large number of spaces between the end of the
1849 name and the colon was received, the reception process suffered a buffer
1850 overflow, and (when I tested it) crashed. This was caused by some obsolete
1851 code that should have been removed. The fix is to remove it!
1853 3. When running in the test harness, delay a bit after writing a bounce
1854 message to get a bit more predictability in the log output.
1856 4. Added a call to search_tidyup() just before forking a reception process. In
1857 theory, someone could use a lookup in the expansion of smtp_accept_max_
1858 per_host which, without the tidyup, could leave open a database connection.
1860 5. Added the variables $recipient_data and $sender_data which get set from a
1861 lookup success in an ACL "recipients" or "senders" condition, or a router
1862 "senders" option, similar to $domain_data and $local_part_data.
1864 6. Moved the writing of debug_print from before to after the "senders" test
1867 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1868 problems for message scanning, either using a data ACL, or using
1869 local_scan() because the Received: header was not generated till after they
1870 were called (in order to set the time as the time of reception completion).
1871 I have revised the way this works. The header is now generated after the
1872 body is received, but before the ACL or local_scan() are called. After they
1873 are run, the timestamp in the header is updated.
1879 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1880 before starting a queue runner without re-exec. This happened only when
1881 deliver_drop_privilege was set or when the Exim user was set to root. The
1882 effect of the bug was that timeouts during subsequent deliveries caused
1883 crashes instead of being properly handled. The handler is now left at its
1884 default (and expected) setting.
1886 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1887 message, again when deliver_drop_privilege is set or Exim is run as root.
1888 The bug described in (1) was not present in this case, but the tidying up
1889 of the other signals was missing. I have made the two cases consistent.
1891 3. The ignore_target_hosts setting on a manualroute router was being ignored
1892 for hosts that were looked up using the /MX notation.
1894 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1897 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1898 operated on the sender address. After changing the $sender_address to <>
1899 for the sender address verify, Exim was re-instated it as the original
1900 (before rewriting) address, but remembering that it had rewritten it, so it
1901 wasn't rewriting it again. This bug also had the effect of breaking the
1902 sender address verification caching when the sender address was rewritten.
1904 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1905 This has been changed so that if the ip literal address matches
1906 ignore_target_hosts, the router declines.
1908 7. Added expansion conditions match_domain, match_address, and match_local_
1909 part (NOT match_host).
1911 8. The placeholder for the Received: header didn't have a length field set.
1913 9. Added code to Exim itself and to exim_lock to test for a specific race
1914 condition that could lead to file corruption when using MBX delivery. The
1915 issue is with the lockfile that is created in /tmp. If this file is removed
1916 after a process has opened it but before that process has acquired a lock,
1917 there is the potential for a second process to recreate the file and also
1918 acquire a lock. This could lead to two Exim processes writing to the file
1919 at the same time. The added code performs the same test as UW imapd; it
1920 checks after acquiring the lock that its file descriptor still refers to
1921 the same named file.
1923 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1924 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1927 11. Added the smtp_active_hostname option. If used, this will typically be made
1928 to depend on the incoming interface address. Because $interface_address is
1929 not set up until the daemon has forked a reception process, error responses
1930 that can happen earlier (such as "too many connections") no longer contain
1933 12. If an expansion in a condition on a "warn" statement fails because a lookup
1934 defers, the "warn" statement is abandoned, and the next ACL statement is
1935 processed. Previously this caused the whole ACL to be aborted.
1937 13. Added the iplsearch lookup type.
1939 14. Added ident_timeout as a log selector.
1941 15. Added tls_certificate_verified as a log selector.
1943 16. Added a global option tls_require_ciphers (compare the smtp transport
1944 option of the same name). This controls incoming TLS connections.
1946 17. I finally figured out how to make tls_require_ciphers do a similar thing
1947 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1948 before starting the TLS session.
1950 18. Tabs are now shown as \t in -bP output.
1952 19. If the log selector return_path_on_delivery was set, Exim crashed when
1953 bouncing a message because it had too many Received: header lines.
1955 20. If two routers both had headers_remove settings, and the first one included
1956 a superfluous trailing colon, the final name in the first list and the
1957 first name in the second list were incorrectly joined into one item (with a
1958 colon in the middle).
1964 1. Added -C and -D options to the exinext utility, mainly to make it easier
1965 to include in the automated testing, but these could be helpful when
1966 multiple configurations are in use.
1968 2. The exinext utility was not formatting the output nicely when there was
1969 an alternate port involved in the retry record key, nor when there was a
1970 message id as well (for retries that were specific to a specific message
1971 and a specific host). It was also confused by IPv6 addresses, because of
1972 the additional colons they contain. I have fixed the IPv4 problem, and
1973 patched it up to do a reasonable job for IPv6.
1975 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1976 delivery, the log line now contains "pipelined" if PIPELINING was used.
1978 4. An SMTP transport process used to panic and die if the bind() call to set
1979 an explicit outgoing interface failed. This has been changed; it is now
1980 treated in the same way as a connect() failure.
1982 5. A reference to $sender_host_name in the part of a conditional expansion
1983 that was being skipped was still causing a DNS lookup. This no longer
1986 6. The def: expansion condition was not recognizing references to header lines
1987 that used bh_ and bheader_.
1989 7. Added the _cache feature to named lists.
1991 8. The code for checking quota_filecount in the appendfile transport was
1992 allowing one more file than it should have been.
1994 9. For compatibility with Sendmail, the command line option
2002 and sets the incoming protocol and host name (for trusted callers). The
2003 host name and its colon can be omitted when only the protocol is to be set.
2004 Note the Exim already has two private options, -pd and -ps, that refer to
2005 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2006 "s", but I don't think that's a major issue.
2008 10. A number of refactoring changes to the code, none of which should affect
2011 (a) The number of logging options was getting close to filling up the
2012 32-bit word that was used as a bit map. I have split them into two classes:
2013 those that are passed in the argument to log_write(), and those that are
2014 only ever tested independently outside of that function. These are now in
2015 separate 32-bit words, so there is plenty of room for expansion again.
2016 There is no change in the user interface or the logging behaviour.
2018 (b) When building, for example, log lines, the code previously used a
2019 macro that called string_cat() twice, in order to add two strings. This is
2020 not really sufficiently general. Furthermore, there was one instance where
2021 it was actually wrong because one of the argument was used twice, and in
2022 one call a function was used. (As it happened, calling the function twice
2023 did not affect the overall behaviour.) The macro has been replaced by a
2024 function that can join an arbitrary number of extra strings onto a growing
2027 (c) The code for expansion conditions now uses a table and a binary chop
2028 instead of a serial search (which was left over from when there were very
2029 few conditions). Also, it now recognizes conditions like "pam" even when
2030 the relevant support is not compiled in: a suitably worded error message is
2031 given if an attempt is made to use such a condition.
2033 11. Added ${time_interval:xxxxx}.
2035 12. A bug was causing one of the ddress fields not to be passed back correctly
2036 from remote delivery subprocesses. The field in question was not being
2037 subsequently used, so this caused to problems in practice.
2039 13. Added new log selectors queue_time and deliver_time.
2041 14. Might have fixed a bug in maildirsizefile handling that threw up
2042 "unexpected character" debug warnings, and recalculated the data
2043 unnecessarily. In any case, I expanded the warning message to give more
2046 15. Added the message "Restricted characters in address" to the statements in
2047 the default ACL that block characters like @ and % in local parts.
2049 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2050 Three changes have been made:
2052 (a) There was a serious bug; a negative response to MAIL caused the whole
2053 recipient domain to be cached as invalid, thereby blocking all messages
2054 to all local parts at the same domain, from all senders. This bug has
2055 been fixed. The domain is no longer cached after a negative response to
2056 MAIL if the sender used is not empty.
2058 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2061 (c) A new callout option, "use_sender" has been added for people who want
2062 the modified behaviour.
2068 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2071 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2072 indeed breaks things for older releases.
2074 3. Added additional logging to the case where there is a problem reading data
2075 from a filter that is running in a subprocess using a pipe, in order to
2076 try to track down a specific problem.
2078 4. Testing facility fudge: when running in the test harness and attempting
2079 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2080 getting "No route to host". Convert this to a timeout.
2082 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2085 6. Some OS don't have socklen_t but use size_t instead. This affects the
2086 fifth argument of getsockopt() amongst other things. This is now
2087 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2088 can be set for individual OS. I have set it for SunOS5, OSF1, and
2089 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2090 some earlier ones do not.
2092 7. Change 4.30/15 was not doing the test caselessly.
2094 8. The standard form for an IPv6 address literal was being rejected by address
2095 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2096 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2097 this, as well as the form without the "IPv6" on the front (but only when
2098 address literals are enabled, of course).
2100 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2102 10. Exim crashed if a message with an empty sender address specified by -f
2103 encountered a router with an errors_to setting. This could be provoked only
2104 by a command such as
2108 where an empty string was supplied; "<>" did not hit this bug.
2110 11. Installed PCRE release 4.5.
2112 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2113 remained set. It is now erased.
2115 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2116 times from message ids (which are base 36 rather than the normal 62).
2118 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2119 were being counted as actual protocol errors, and logged if the log
2120 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2121 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2122 and DATA following a set of rejected RCPTs do not count as protocol errors.
2123 In other words, Exim assumes they were pipelined, though this may not
2124 actually be the case. Of course, in all cases the client gets an
2125 appropriate error code.
2127 15. If a lookup fails in an ACL condition, a message about the failure may
2128 be available; it is used if testing the ACL cannot continue, because most
2129 such messages specify what the cause of the deferral is. However, some
2130 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2131 that caused an old message to be retained and used if a later statement
2132 caused a defer, replacing the real cause of the deferral.
2134 16. If an IP address had so many PTR records that the DNS lookup buffer
2135 was not large enough to hold them, Exim could crash while trying to process
2136 the truncated data. It now detects and logs this case.
2138 17. Further to 4.21/58, another change has been made: if (and only if) the
2139 first line of a message (the first header line) ends with CRLF, a bare LF
2140 in a subsequent header line has a space inserted after it, so as not to
2141 terminate the header.
2143 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2144 unnecessarily, used atoi() instead of strtol(), and didn't check the
2145 termination when getting file sizes from file names by regex.
2147 19. Completely re-implemented the support for maildirsize files, in the light
2148 of a number of problems with the previous contributed implementation
2149 (4.30/29). In particular:
2151 . If the quota is zero, the maildirsize file is maintained, but no quota is
2154 . If the maildir directory does not exist, it is created before any attempt
2155 to write a maildirsize file.
2157 . The quota value in the file is just a cache; if the quota is changed in
2158 the transport, the new value overrides.
2160 . A regular expression is available for excluding directories from the
2163 20. The autoreply transport checks the characters in options that define the
2164 message's headers; it allows continued headers, but it was checking with
2165 isspace() after an embedded newline instead of explicitly looking for a
2168 21. If all the "regular" hosts to which an address was routed had passed their
2169 expiry times, and had not reached their retry times, the address was
2170 bounced, even if fallback hosts were defined. Now Exim should go on to try
2173 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2174 equivalent code in the SMTP transport. Some hosts send humungous responses
2175 to HELO/EHLO, more than 1024 it seems.
2177 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2178 gives compiler warnings in some environments. I've now done it "properly",
2181 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2182 (because of problems with the built-in one) was declared to return uschar *
2183 instead of char *, causing compiler failure.
2185 25. Fixed a file descriptor leak when processing alias/forward files.
2187 26. Fixed a minor format string issue in dbfn.c.
2189 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2191 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2192 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2195 29. When a sender address is verified, it is cached, to save repeating the test
2196 when there is more than one recipient in a message. However, when the
2197 verification involves a callout, it is possible for different callout
2198 options to be set for different recipients. It is too complicated to keep
2199 track of this in the cache, so now Exim always runs a verification when a
2200 callout is required, relying on the callout cache for the optimization.
2201 The overhead is duplication of the address routing, but this should not be
2204 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2205 to be verified with callout=postmaster, and the main callout worked but the
2206 postmaster check failed, the verification correctly failed. However, if a
2207 subsequent RCPT command asked for sender verification *without* the
2208 postmaster check, incorrect caching caused this verification also to fail,
2211 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2212 it was not caching the DNS options (qualify_single, search_parents) that
2213 were used when the lookup failed. A subsequent lookup with different
2214 options therefore always gave the same answer, though there were cases
2215 where it should not have. (Example: a "domains = !$mx_any" option on a
2216 dnslookup router: the "domains" option is always processed without any
2217 widening, but the router might have qualify_single set.) Now Exim uses the
2218 cached value only when the same options are set.
2220 32. Added John Jetmore's "exipick" utility to the distribution.
2222 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2223 than a timeout (e.g. a certificate is required, and is not provided), an
2224 Exim server now closes the connection immediately. Previously it waited for
2225 the client to close - but if the client is SSL, it seems that they each
2226 wait for each other, leading to a delay before one of them times out.
2228 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2229 maintained 0.8.x compatibility because I don't think many are using it, and
2230 it is clearly obsolete.
2232 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2235 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2236 client certificate was expired. A simple patch fixes this, though I don't
2237 understand the full logic of why the verify callback is called multiple
2240 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2241 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2242 which causes problems with some clients (such as the Certicom SSL Plus
2243 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2244 disables the coutermeasure allowing Eudora to connect."
2246 38. Exim was not checking that a write() to a log file succeeded. This could
2247 lead to Bad Things if a log got too big, in particular if it hit a file
2248 size limit. Exim now panics and dies if it cannot write to a log file, just
2249 as it does if it cannot open a log file.
2251 39. Modified OS/Makefile-Linux so that it now contains
2253 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2255 The two -D definitions ensure that Exim is compiled with large file
2256 support, which makes it possible to handle log files that are bigger than
2259 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2260 instance) a domain was checked against a named list that involved a lookup,
2261 causing $domain_data to be set, then another domain was checked against the
2262 same list, then the first domain was re-checked, the value of $domain_data
2263 after the final check could be wrong. In particular, if the second check
2264 failed, it could be set empty. This bug probably also applied to
2267 41. The strip_trailing_dot option was not being applied to the address given
2268 with the -f command-line option.
2270 42. The code for reading a message's header from the spool was incrementing
2271 $received_count, but never initializing it. This meant that the value was
2272 incorrect (doubled) while delivering a message in the same process in which
2273 it was received. In the most common configuration of Exim, this never
2274 happens - a fresh exec is done - but it can happen when
2275 deliver_drop_privilege is set.
2277 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2278 it now includes up to 150 characters of the unexpected data in the log
2281 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2282 and building data strings. The size of both of these buffers was 10 000
2283 bytes - far larger than anybody would *ever* want, thought I. Needless to
2284 say, somebody hit the limit. I have increased the maximum line length to
2285 20 000 and the maximum data length of concatenated lines to 100 000. I have
2286 also fixed two bugs, because there was no checking on these buffers. Tsk,
2287 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2288 buffer is too small.
2290 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2291 lsearch lookups. Now it does.
2293 46. When parsing a route_list item in a manualroute router, a fixed-length
2294 buffer was used for the list of hosts. I made this 1024 bytes long,
2295 thinking that nobody would ever have a list of hosts that long. Wrong.
2296 Somebody had a whole pile of complicated expansion conditions, and the
2297 string was silently truncated, leading to an expansion error. It turns out
2298 that it is easier to change to an unlimited length (owing to other changes
2299 that have happened since this code was originally written) than to build
2300 structure for giving a limitation error. The length of the item that
2301 expands into the list of hosts is now unlimited.
2303 47. The lsearch lookup could not handle data where the length of text line was
2304 more than 4095 characters. Such lines were truncated, leading to shortened
2305 data being returned. It should now handle lines of any length.
2307 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2308 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2311 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2312 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2313 no longer happens in comment lines. A list of replacements is now placed
2314 at the head of all of the source files, except those whose only change is
2315 to replace PERL_COMMAND in the very first #! line.
2317 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2318 messages on the queue, with a bottom-up merge sort, using code contributed
2319 by Michael Haardt. This should make operations like -bp somewhat faster on
2320 large queues. It won't affect queue runners, except when queue_run_in_order
2323 51. Installed eximstats 1.31 in the distribution.
2325 52. Added support for SRV lookups to the dnslookup router.
2327 53. If an ACL referred to $message_body or $message_body_end, the value was not
2328 reset for any messages that followed in the same SMTP session.
2330 54. The store-handling optimization for building very long strings was not
2331 differentiating between the different store pools. I don't think this
2332 actually made any difference in practice, but I've tidied it.
2334 55. While running the routers to verify a sender address, $sender_address
2335 was still set to the sender address. This is wrong, because when routing to
2336 send a bounce to the sender, it would be empty. Therefore, I have changed
2337 it so that, while verifying a sender address, $sender_address is set to <>.
2338 (There is no change to what happens when verifying a recipient address.)
2340 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2341 target A or AAAA records (if not already returned) without resetting the
2342 qualify_single or search_parents options of the DNS resolver. These are
2343 inappropriate in this case because the targets of MX and SRV records must
2344 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2345 target that, when qualified, matched something in the local domain. These
2346 two options are now turned off when doing these lookups.
2348 57. It seems that at least some releases of Reiserfs (which does not have the
2349 concept of a fixed number of inodes) returns zero and not -1 for the
2350 number of available inodes. This interacted badly with check_spool_inodes,
2351 which assumed that -1 was the "no such thing" setting. What I have done is
2352 to check that the total number of inodes is greater than zero before doing
2353 the test of how many are available.
2355 58. When a "warn" ACL statement has a log_message modifier, the message is
2356 remembered, and not repeated. This is to avoid a lot of repetition when a
2357 message has many recipients that cause the same warning to be written.
2358 Howewer, Exim was preserving the list of already written lines for an
2359 entire SMTP session, which doesn't seem right. The memory is now reset if a
2360 new message is started.
2362 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2363 debugging output unless log_rewrite was also set.
2365 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2366 of (int)(handle) when we know that handle contains (void *)(-1).
2368 61. The Exim daemon panic-logs an error return when it closes the incoming
2369 connection. However "connection reset by peer" seems to be common, and
2370 isn't really an error worthy of noting specially, so that particular error
2373 62. When Exim is trying to find all the local interfaces, it used to panic and
2374 die if the ioctl to get the interface flags failed. However, it seems that
2375 on at least one OS (Solaris 9) it is possible to have an interface that is
2376 included in the list of interfaces, but for which you get a failure error
2377 for this call. This happens when the interface is not "plumbed" into a
2378 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2379 failure of the "get flags" call assumes that the interface is down.
2381 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2382 makes life easier for people who are doing arithmetic on fields extracted
2383 from dates, where you often get leading zeros that should not be
2384 interpreted as octal.
2386 64. Added qualify_domain to the redirect router, to override the global
2389 65. If a pathologically long header line contained very many addresses (the
2390 report of this problem mentioned 10 000) and each of them was rewritten,
2391 Exim could use up a very large amount of memory. (It kept on making new
2392 copies of the header line as it rewrote, and never released the old ones.)
2393 At the expense of a bit more processing, the header rewriting function has
2394 been changed so that it no longer eats memory in this way.
2396 66. The generation of the Received: header has been moved from the time that a
2397 message starts to be received, to the time that it finishes. The timestamp
2398 in the Received: header should now be very close to that of the <= log
2399 line. There are two side-effects of this change:
2401 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2402 logged header lines no longer include the local Received: line, because
2403 it has not yet been created. The same applies to a copy of the message
2404 that is returned to a non-SMTP sender when a message is rejected.
2406 (b) When a filter file is tested using -bf, no additional Received: header
2407 is added to the test message. After some thought, I decided that this
2410 This change does not affect the value of $received_for. It is still set
2411 after address rewriting, but before local_scan() is called.
2413 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2415 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2416 gave an unhelpful panic error message, and a defer error. I have managed to
2417 change this behaviour so that it now rejects any supplied certificate,
2418 which seems right, as the list of acceptable certificates is empty.
2420 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2421 gave an unhelpful defer error. I have not managed to make this reject any
2422 supplied certificates, but the error message it gives is "no certificate
2423 supplied", which is not helpful.
2425 70. exigrep's output now also includes lines that are not associated with any
2426 message, but which match the given pattern. Implemented by a patch from
2427 Martin Sluka, which also tidied up the Perl a bit.
2429 71. Recipient callout verification, like sender verification, was using <> in
2430 the MAIL FROM command. This isn't really the right thing, since the actual
2431 sender may affect whether the remote host accepts the recipient or not. I
2432 have changed it to use the actual sender in the callout; this means that
2433 the cache record is now keyed on a recipient/sender pair, not just the
2434 recipient address. There doesn't seem to be a real danger of callout loops,
2435 since a callout by the remote host to check the sender would use <>.
2436 [SEE ABOVE: changed after hitting problems.]
2438 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2439 temporary errors. However, in the case of such a code being given after
2440 the end of a data transmission (i.e. after ".") Exim was failing to write
2441 a retry record for the message. (Yes, there was some broken host that was
2442 actually sending 8xx at this point.)
2444 73. An unknown lookup type in a host list could cause Exim to panic-die when
2445 the list was checked. (An example that provoked this was putting <; in the
2446 middle of a list instead of at the start.) If this happened during a DATA
2447 ACL check, a -D file could be left lying around. This kind of configuration
2448 error no longer causes Exim to die; instead it causes a defer errror. The
2449 incident is still logged to the main and panic logs.
2451 74. Buglet left over from Exim 3 conversion. The message "too many messages
2452 in one connection" was written to the rejectlog but not the mainlog, except
2453 when address rewriting (yes!) was being logged.
2455 75. Added write_rejectlog option.
2457 76. When a system filter was run not as root (that is, when system_filter_user
2458 was set), the values of the $n variables were not being returned to the
2459 main process; thus, they were not subsequently available in the $sn
2462 77. Added +return_path_on_delivery log selector.
2464 78. A connection timeout was being treated differently from recipients deferred
2465 when testing hosts_max_try with a message that was older than the host's
2466 retry timeout. (The host should not be counted, thus allowing all hosts to
2467 be tried at least once before bouncing.) This may have been the cause of an
2468 occasionally reported bug whereby a message would remain on the queue
2469 longer than the retry timeout, but would be bounced if a delivery was
2470 forced. I say "may" because I never totally pinned down the problem;
2471 setting up timeout/retry tests is difficult. See also the next item.
2473 79. The ultimate address timeout was not being applied to errors that involved
2474 a combination of host plus message (for example, a timeout on a MAIL
2475 command). When an address resolved to a number of possible hosts, and they
2476 were not all tried for each delivery (e.g. because of hosts_max_try), a
2477 message could remain on the queue longer than the retry timeout.
2479 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2482 81. Fixed an obscure SMTP outgoing bug which required at least the following
2483 conditions: (a) there was another message waiting for the same server;
2484 (b) the server returned 5xx to all RCPT commands in the first message so
2485 that the message was not completed; (c) the server dropped the connection
2486 or gave a negative response to the RSET that Exim sends to abort the
2487 transaction. The observed case was a dropped connection after DATA that had
2488 been sent in pipelining mode. That is, the server had advertised PIPELINING
2489 but was not implementing it correctly. The effect of the bug was incorrect
2490 behaviour, such as trying another host, and this could lead to a crash.
2496 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2497 and daemon.c were passed as pointers to ints; they should have been
2498 pointers to socklen_t variables (which are typically unsigned ints).
2500 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2503 3. Fixed a really odd bug that affected only the testing scheme; patching a
2504 certain fixed string in the binary changed the value of another string that
2505 happened to be identical to the end of the original first string.
2507 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2508 name", it returns that address as the IP address. On some operating
2509 systems (e.g. Solaris), it also passes back the IP address string as the
2510 "host name". However, on others (e.g. Linux), it passes back an empty
2511 string. Exim wasn't checking for this, and was changing the host name to an
2512 empty string, assuming it had been canonicized.
2514 5. Although rare, it is permitted to have more than one PTR record for a given
2515 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2516 all the names associated with an address, because they do in Solaris.
2517 However, it seems that they do not in Linux for data that comes from the
2518 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2519 I found this out when I moved to a new Linux workstation and tried to run
2520 the Exim test suite.
2522 To get round this problem I have changed the code so that it now does its
2523 own call to the DNS to look up PTR records when searching for a host name.
2524 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2525 addresses that are only in /etc/hosts are still found.
2527 This behaviour is, however, controlled by an option called host_lookup_
2528 order, which defaults to "bydns:byaddr". If people want to use the other
2529 order, or indeed, just use one or the other means of lookup, they can
2530 specify it in this variable.
2532 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2533 some operating systems, this comes back from gethostbyaddr() as an empty
2534 string, and this is what Exim used to test for. However, it seems that in
2535 other systems, "." is yielded. Exim now tests for this case too.
2537 7. The values of check_spool_space and check_log_space are now held internally
2538 as a number of kilobytes instead of an absolute number of bytes. If a
2539 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2540 kilobyte. This means that much larger values can be stored.
2542 8. Exim monitor: an attempt to get the action menu when not actually pointing
2543 at a message produces an empty menu entitled "No message selected". This
2544 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2545 no entries in it ("Shell widget menu has zero width and/or height"). So I
2546 have added a single, blank menu entry in this case.
2548 9. Added ${quote_local_part.
2550 10. MIME decoding is now applied to the contents of Subject: header lines when
2553 11. Now that a reference to $sender_host_address automatically causes a reverse
2554 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2555 host lookup before query-style lookups in lists that might use this
2556 variable. This has therefore been abolished, and the "net-" prefix is no
2557 longer necessary for query-style lookups.
2559 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2560 have been a typo for LFLAGS, so it has been changed.
2562 13. The install script calls Exim with "-C /dev/null" in order to find the
2563 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2564 to be output. Howeve, since Exim outputs its version number before the
2565 error, it didn't break the script. It just looked ugly. I fixed this by
2566 always allowing "-C /dev/null" if the caller is root.
2568 14. Ignore overlarge ACL variable number when reading spool file - insurance
2569 against a later release with more variables having written the file.
2571 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2572 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2573 this, as well as the form without the "IPv6" on the front.
2575 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2576 OS/Makefile-Darwin file.
2578 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2579 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2581 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2582 variable. However, some OS use ints for inodes. I've added cast to long int
2583 to get rid of the compiler warning.
2585 19. I had forgotten to lock out "/../" in configuration file names when
2586 ALT_CONFIG_PREFIX was set.
2588 20. Routers used for verification do not need to specify transports. However,
2589 if such a router generated a host list, and callout was configured, Exim
2590 crashed, because it could not find a port number from the (non-existent)
2591 transport. It now assumes port 25 in this circumstance.
2593 21. Added the -t option to exigrep.
2595 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2596 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2597 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2598 them is set, LOOKUP_LSEARCH is forced.
2600 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2602 24. Added sender and host information to the "rejected by local_scan()" log
2603 line; previously there was no indication of these.
2605 25. Added .include_if_exists.
2607 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2608 Linux. It turns out that not all file systems support this. Apparently some
2609 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2610 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2611 not supported on the file descriptor, is now ignored when Exim is trying to
2612 sync a directory. This applies only to Linux.
2614 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2616 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2617 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2620 29. Added support for maildirsize files from supplied patch (modified a bit).
2622 30. The use of :fail: followed by an empty string could lead Exim to respond to
2623 sender verification failures with (e.g.):
2625 550 Verification failed for <xxx>
2626 550 Sender verify failed
2628 where the first response line was missing the '-' that indicates it is not
2629 the final line of the response.
2631 31. The loop for finding the name of the user that called Exim had a hardwired
2632 limit of 10; it now uses the value of finduser_retries, which is used for
2633 all other user lookups.
2635 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2638 33. Exim was neglecting to zero errno before one call of strtol() when
2639 expanding a string and expecting an integer value. On some systems this
2640 resulted in spurious "integer overflow" errors. Also, it was casting the
2641 result into an int without checking.
2643 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2644 did not work. The code looks as if it has *never* worked, though it appears
2645 to have been documented since at least releast 1.62. I have made it work.
2647 35. The "timeout_DNS" error in retry rules, also documented since at least
2648 1.62, also never worked. As it isn't clear exactly what this means, and
2649 clearly it isn't a major issue, I have abolished the feature by treating it
2650 as "timeout", and writing a warning to the main and panic logs.
2652 36. The display of retry rules for -brt wasn't always showing the error code
2655 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2656 timeout_connect_A, timeout_connect_MX.
2658 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2659 to the empty sender.
2661 39. The daemon was not analysing the content of -oX till after it had closed
2662 stderr and disconnected from the controlling terminal. This meant that any
2663 syntax errors were only noted on the panic log, and the return code from
2664 the command was 0. By re-arranging the code a little, I've made the
2665 decoding happen first, so such errors now appear on stderr, and the return
2666 code is 1. However, the actual setting up of the sockets still happens in
2667 the disconnected process, so errors there are still only recorded on the
2670 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2671 connections (as happens on some IP stacks) was logged at start up time as
2672 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2673 it from "IPv6 and IPv4", which means that two separate sockets are being
2676 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2677 says whether AF_INET or AF_INET6 was passed as an argument.
2679 42. Exiwhat output was messed up when time zones were included in log
2682 43. Exiwhat now gives more information about the daemon's listening ports,
2683 and whether -tls-on-connect was used.
2685 44. The "port" option of the smtp transport is now expanded.
2687 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2688 silently ignored. Now an error message is written to the main and panic
2691 46. There's a new ACL modifier called "logwrite" which writes to a log file
2692 as soon as it is encountered.
2694 47. Added $local_user_uid and $local_user_gid at routing time.
2696 48. Exim crashed when trying to verify a sender address that was being
2699 49. Exim was recognizing only a space character after ".include". It now also
2700 recognizes a tab character.
2702 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2703 extracting the relevant information from the specification. The man page no
2704 longer contains scrambled data for the -d option, and I've added a section
2705 at the front about calling Exim under different names.
2707 51. Added "extra_headers" argument to the "mail" command in filter files.
2709 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2712 53. Installed eximstats 1.29.
2714 54. Added transport_filter_timeout as a generic transport option.
2716 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2717 Cc: header lines. This was required by RFC 822, but it not required by RFC
2720 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2721 incoming messages that did not have them. Now it does so only if the
2722 message originates locally, that is, if there is no associated remote host
2723 address. When Resent- header lines are present, this applies to the Resent-
2724 lines rather than the non-Resent- lines.
2726 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2727 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2729 58. Messages for configuration errors now include the name of the main
2730 configuration file - useful now that there may be more than one file in a
2731 list (.included file names were always shown).
2733 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2734 for those rare installations that do not start the daemon as root or run it
2735 setuid root. I've cut out the call to initgroups() if the daemon is not
2738 60. The Exim user and group can now be bound into the binary as text strings
2739 that are looked up at the start of Exim's processing.
2741 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2743 62. Added $mailstore_basename variable.
2745 63. Installed patch to sieve.c from Michael Haardt.
2747 64. When Exim failed to open the panic log after failing to open the main log,
2748 the original message it was trying to log was written to stderr and debug
2749 output, but if they were not available (the usual case in production), it
2750 was lost. Now it is written to syslog before the two lines that record the
2751 failures to open the logs.
2753 65. Users' Exim filters run in subprocesses under the user's uid. It is
2754 possible for a "deliver" command or an alias in a "personal" command to
2755 provoke an address rewrite. If logging of address rewriting is configured,
2756 this fails because the process is not running as root or exim. There may be
2757 a better way of dealing with this, but for the moment (because 4.30 needs
2758 to be released), I have disabled address rewrite logging when running a
2759 filter in a non-root, non-exim process.
2765 1. The buildconfig auxiliary program wasn't quoting the value set for
2766 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2767 not defined. This bug was masked in 4.22 by the effect that was fixed in
2770 2. Some messages that were rejected after a message id was allocated were
2771 shown as "incomplete" by exigrep. It no longer does this for messages that
2772 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2774 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2775 have allow_domain_literals set, the ID did not get logged in the <= line.
2776 Domain literals are now always recognized in Message-ID: header lines.
2778 4. The first argument for a ${extract expansion item is the key name or field
2779 number. Leading and trailing spaces in this item were not being ignored,
2780 causing some misleading effects.
2782 5. When deliver_drop_privilege was set, single queue runner processes started
2783 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2784 same command in the process it spins off) were not dropping privilege.
2786 6. When the daemon running as "exim" started a queue runner, it always
2787 re-executed Exim in the spun-off process. This is a waste of effort when
2788 deliver_drop_privilege is set. The new process now just calls the
2789 queue-runner function directly.
2795 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2798 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2799 ignored. Though the use of -oP was forcing the writing of a pid file, it
2800 was always written to the default place.
2802 3. If the message "no IP address found for host xxxx" is generated during
2803 incoming verification, it is now followed by identification of the incoming
2804 connection (so you can more easily find what provoked it).
2806 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2808 5. Added some features to "harden" Exim a bit more against certain attacks:
2810 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2811 be put in Local/Makefile. This is like the never_users runtime option,
2812 but it cannot be overridden. The default setting is "root".
2814 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2815 prefix string with which any file named in a -C command line option
2818 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2819 is retained for -C and -D only if the caller of Exim is root. Without
2820 it, the exim user may also use -C and -D and retain privilege.
2822 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2823 command line option is disabled.
2825 6. Macro names set by the -D option must start with an upper case letter, just
2826 like macro names defined in the configuration file.
2828 7. Added "dereference=" facility to LDAP.
2830 8. Two instances of the typo "uknown" in the source files are fixed.
2832 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2833 the Configure-Makefile script screwed up while processing it.
2835 10. Incorporated PCRE 4.4.
2837 11. The SMTP synchronization check was not operating right at the start of an
2838 SMTP session. For example, it could not catch a HELO sent before the client
2839 waited for the greeting. There is now a check for outstanding input at the
2840 point when the greeting is written. Because of the duplex, asynchronous
2841 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2842 way, but not yet received, when the check is performed.
2844 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2845 on TCP/IP sockets, because this apparently causes some broken clients to
2848 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2849 unchanged) from the Cygwin maintainer.
2851 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2852 was supported instead of testing for mbx. Effectively a typo.
2854 15. The spa authenticator server code was not checking that the input it
2855 received was valid base64.
2857 16. The debug output line for the "set" modifier in ACLs was not showing the
2858 name of the variable that was being set.
2860 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2862 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2863 lookup on its own. Something else was needed to trigger the lookup. For
2864 example, a match in host_lookup or the need for a host name in a host list.
2865 Now, if $sender_host_name is referenced and the host name has not yet been
2866 looked up, a lookup is performed. If the lookup fails, the variable remains
2867 empty, and $host_lookup_failed is set to "1".
2869 19. Added "eqi" as a case-independent comparison operator.
2871 20. The saslauthd authentication condition could segfault if neither service
2872 nor realm was specified.
2874 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2875 error message that was logged was misleading, and incoming SMTP
2876 connections were dropped. The message is now more accurate, and temporary
2877 errors are given to SMTP connections.
2879 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2880 (except RSET) with a 421 error, until QUIT is received. However, it was
2881 failing to send a response to QUIT.
2883 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2884 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2885 ACL is now run after the helo_try_verify_hosts code.
2887 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2888 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2889 case-independent, so other case variants are also recognized). Apparently
2890 some systems use these upper case variants.
2892 25. If more than two messages were waiting for the same host, and a transport
2893 filter was specified for the transport, Exim sent two messages over the
2894 same TCP/IP connection, and then failed with "socket operation on non-
2895 socket" when it tried to send the third.
2897 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2899 27. The extern definition of crypt16() in expand.c was not being excluded when
2900 the OS had its own crypt16() function.
2902 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2903 as a preferred synonym for return_size_limit, both as an option and as an
2906 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2908 30. Changed the default configuration ACL to relax the local part checking rule
2909 for addresses that are not in any local domains. For these addresses,
2910 slashes and pipe symbols are allowed within local parts, but the sequence
2911 /../ is explicitly forbidden.
2913 31. SPA server authentication was not clearing the challenge buffer before
2916 32. log_message in a "warn" ACL statement was writing to the reject log as
2917 well as to the main log, which contradicts the documentation and doesn't
2918 seem right (because no rejection is happening). So I have stopped it.
2920 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2921 However, I am unable to do any testing of this.
2923 34. Fixed an infelicity in the appendfile transport. When checking directories
2924 for a mailbox, to see if any needed to be created, it was accidentally
2925 using path names with one or more superfluous leading slashes; tracing
2926 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2928 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2929 contents are added to the log line that is written for every discarded
2930 recipient. (Previously a log_message setting was ignored.)
2932 36. The ${quote: operator now quotes the string if it is empty.
2934 37. The install script runs exim in order to find its version number. If for
2935 some reason other than non-existence or emptiness, which it checks, it
2936 could not run './exim', it was installing it with an empty version number,
2937 i.e. as "exim-". This error state is now caught, and the installation is
2940 38. An argument was missing from the function that creates an error message
2941 when Exim fails to connect to the socket for saslauthd authentication.
2942 This could cause Exim to crash, or give a corrupted message.
2944 39. Added isip, isip4, and isip6 to ${if conditions.
2946 40. The ACL variables $acl_xx are now saved with the message, and can be
2947 accessed later in routers, transports, and filters.
2949 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2950 strings in the file are not string-expanded.
2952 42. If a MAIL command specified a SIZE value that was too large to fit into an
2953 int variable, the check against message_size_limit failed. Such values are
2954 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2955 day this will have to be increased, but I don't think I want to be around
2956 when emails are that large.
2963 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2964 iconv() is not standard in FreeBSD.
2966 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2967 IPv6 enabled. The observed symptom was a segmentation fault on return from
2968 the function os_common_find_running_interfaces() in src/os.c.
2970 3. In the check_special_case() function in daemon.c I had used "errno" as an
2971 argument name, which causes warnings on some systems. This was basically a
2972 typo, since it was named "eno" in the comments!
2974 4. The code that waits for the clock to tick (at a resolution of some fraction
2975 of a second) so as to ensure message-id uniqueness was always waiting for
2976 at least one whole tick, when it could have waited for less. [This is
2977 almost certainly not relevant at current processor speeds, where it is
2978 unlikely to ever wait at all. But we try to future-proof.]
2980 5. The function that sleeps for a time interval that includes fractions of a
2981 second contained a race. It did not block SIGALRM between setting the
2982 timer, and suspending (a couple of lines later). If the interval was short
2983 and the sigsuspend() was delayed until after it had expired, the suspension
2984 never ended. On busy systems this could lead to processes getting stuck for
2987 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2988 process, before it forks any delivery processes. The open lookup caching
2989 mechanism meant that the open file or database connection was passed into
2990 the delivery process. The problem was that delivery processes always tidy
2991 up cached lookup data. This could cause a problem for the next delivery
2992 process started by the queue runner, because the external queue runner
2993 process does not know about the closure. So the next delivery process
2994 still has data in the lookup cache. In the case of a file lookup, there was
2995 no problem because closing a file descriptor in a subprocess doesn't affect
2996 the parent. However, if the lookup was caching a connection to a database,
2997 the connection was closed, and the second delivery process was likely to
2998 see errors such as "PGSQL: query failed: server closed the connection
2999 unexpectedly". The problem has been fixed by closing all cached lookups
3000 in a queue runner before running a delivery process.
3002 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3003 seem to have the "const" qualifier which it has on other OS. I've
3006 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3007 *of the same type* (client or server) with the same public name that an
3008 error should be diagnosed.
3010 9. When Exim looked up a host name for an IP address, but failed to find the
3011 original IP address when looking up the host name (a safety check), it
3012 output the message "<ip address> does not match any IP for NULL", which was
3013 confusing, to say the least. The bug was that the host name should have
3014 appeared instead of "NULL".
3016 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3017 user that is built into the binary, and the -C or -D options is used, root
3018 privilege is dropped before the configuration file is read. In addition,
3019 logging is switched to stderr instead of the normal log files. If the
3020 configuration then re-defines the Exim user, the unprivileged environment
3021 is probably not what is expected, so Exim logs a panic warning message (but
3024 However, if deliver_drop_privilege is set, the unprivileged state may well
3025 be exactly what is intended, so the warning has been cut out in that case,
3026 and Exim is allowed to try to write to its normal log files.
3032 1. smtp_return_error_details was not giving details for temporary sender
3033 or receiver verification errors.
3035 2. Diagnose a configuration error if two authenticators have the same public
3038 3. Exim used not to create the message log file for a message until the first
3039 delivery attempt. This could be confusing when incoming messages were held
3040 for policy or load reasons. The message log file is now created at the time
3041 the message is received, and an initial "Received" line is written to it.
3043 4. The automatically generated man page for command line options had a minor
3044 bug that caused no ill effects; however, a more serious problem was that
3045 the procedure for building the man page automatically didn't always
3046 operate. Consequently, release 4.20 contains an out-of-date version. This
3047 shouldn't happen again.
3049 5. When building Exim with embedded Perl support, the script that builds the
3050 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3051 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3053 6. The freeze_tell option was not being used for messages that were frozen on
3054 arrival, either by an ACL or by local_scan().
3056 7. Added the smtp_incomplete_transaction log selector.
3058 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3059 was accepting AUTH without a new EHLO.
3061 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3062 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3065 10. Logging of TCP/IP connections (when configured) now happens in the main
3066 daemon process instead of the child process, so that the TCP/IP connection
3067 count is more accurate (but it can never be perfect).
3069 11. The use of "drop" in a nested ACL was not being handled correctly in the
3070 outer ACL. Now, if condition failure induced by the nested "drop" causes
3071 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3072 or "require"), the connection is dropped.
3074 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3075 that yield "discard" can now be used with an "accept" or a "discard" verb,
3076 but an error is generated for any others (because I can't see a useful way
3077 to define what should happen).
3079 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3080 are now processed in the same way as lines in the Exim configuration file.
3081 In particular, continuation lines are supported.
3083 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3085 15. Added -ti meaning -t -i.
3087 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3088 domains, and warn by logging if others are found.
3090 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3091 returned from GIFCONF when Exim is trying to find the list of interfaces on
3092 a host. The code in os.c has been modified to copy each ifreq to an aligned
3093 structure in all cases.
3095 Also, in some cases, the returned ifreq's were being copied to a 'struct
3096 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3097 means the last couple of bytes of an IPv6 address could be chopped if the
3098 ifreq contained only a normal sockaddr (14 bytes storage).
3100 18. Named domain lists were not supported in the hosts_treat_as_local option.
3101 An entry such as +xxxx was not recognized, and was treated as a literal
3104 19. Ensure that header lines added by a DATA ACL are included in the reject log
3105 if the ACL subsequently rejects the message.
3107 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3108 MD5 (which is deprecated).
3110 21. When testing a filter file using -bf, Exim was writing a message when it
3111 took the sender from a "From " line in the message, but it was not doing so
3112 when it took $return_path from a Return-Path: header line. It now does.
3114 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3115 with a valid header line field name (a series of printing characters
3116 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3118 23. Changed "disc" in the source to "disk" to conform to the documentation and
3119 the book and for uniformity.
3121 24. Ignore Sendmail's -Ooption=value command line item.
3123 25. When execve() failed while trying to run a command in a pipe transport,
3124 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3125 could be confused with a return value of 69 from the command itself. This
3126 has been changed to 127, the value the shell returns if it is asked to run
3127 a non-existent command. The wording for the related log line suggests a
3128 non-existent command as the problem.
3130 26. If received_header_text expands to an empty string, do not add a Received:
3131 header line to the message. (Well, it adds a token one on the spool, but
3132 marks it "old" so that it doesn't get used or transmitted.)
3134 27. Installed eximstats 1.28 (addition of -nt option).
3136 28. There was no check for failure on the call to getsockname() in the daemon
3137 code. This can fail if there is a shortage of resources on the system, with
3138 ENOMEM, for example. A temporary error is now given on failure.
3140 29. Contrary to the C standard, it seems that in some environments, the
3141 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3142 program. Exim now does this explicitly; it affects the formatting of
3143 timestamps using strftime().
3145 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3146 complaints. I've now initialized all the variables, to avoid this.
3148 32. Header lines added by a system filter were not being "seen" during
3149 transport-time rewrites.
3151 33. The info_callback() function passed to OpenSSL is set up with type void
3152 (*)(SSL *, int, int), as described somewhere. However, when calling the
3153 function (actually a macro) that sets it up, the type void(*)() is
3154 expected. I've put in a cast to prevent warnings from picky compilers.
3156 34. If a DNS black list lookup found a CNAME record, but there were no A
3157 records associated with the domain it pointed at, Exim crashed.
3159 35. If a DNS black list lookup returned more than one A record, Exim ignored
3160 all but the first. It now scans all returned addresses if a particular IP
3161 value is being sought. In this situation, the contents of the
3162 $dnslist_value variable are a list of all the addresses, separated by a
3165 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3166 to accept a host name and all its aliases if the forward lookup for any of
3167 them yielded the IP address of the incoming connection. Now it accepts only
3168 those names whose forward lookup yields the correct IP address. Any other
3169 names are discarded. This closes a loophole whereby a rogue DNS
3170 administrator could create reverse DNS records to break through a
3171 wildcarded host restriction in an ACL.
3173 37. If a user filter or a system filter that ran in a subprocess used any of
3174 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3175 the wrong values were passed to the pipe command ($thisaddress had the
3176 value of $0, $0 had the value of $1, etc). This bug was introduced by
3177 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3179 38. Improved the line breaking for long SMTP error messages from ACLs.
3180 Previously, if there was no break point between 40 and 75 characters, Exim
3181 left the rest of the message alone. Two changes have been made: (a) I've
3182 reduced the minimum length to 35 characters; (b) if it can't find a break
3183 point between 35 and 75 characters, it looks ahead and uses the first one
3184 that it finds. This may give the occasional overlong line, but at least the
3185 remaining text gets split now.
3187 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3188 file descriptors might be low, and that setting 1000 would always raise it.
3189 It turns out that in some environments, the limit is already over 1000 and
3190 that lowering it causes trouble. So now Exim takes care not to decrease it.
3192 40. When delivering a message, the value of $return_path is set to $sender_
3193 address at the start of routing (routers may change the value). By an
3194 oversight, this default was not being set up when an address was tested by
3195 -bt or -bv, which affected the outcome if any router or filter referred to
3198 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3199 log only when "message" or "log_message" are set. However, if one of the
3200 conditions was an address verification, or a call to a nested ACL, the
3201 messages generated by the underlying test were being passed through. This
3202 no longer happens. The underlying message is available in $acl_verify_
3203 message for both "message" and "log_message" expansions, so it can be
3204 passed through if needed.
3206 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3207 new expansion $bh_ to give the encoded byte string without charset
3208 translation. Translation happens only if iconv() is available; HAVE_ICONV
3209 indicates this at build time. HEADERS_CHARSET gives the charset to
3210 translate to; headers_charset can change it in the configuration, and
3211 "headers charset" can change it in an individual filter file.
3213 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3214 that creates RFC 2047 encoded "words" labels them as that charset instead
3215 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3216 expansion operator; (ii) when Exim creates a From: line for a local
3217 message; (iii) when a header line is rewritten to include a "phrase" part.
3219 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3220 buggy, causing it to skip the first lines of messages whose message ID
3221 ended in 'D'. This would not have bitten before Exim release 4.14, because
3222 message IDs were unlikely to end in 'D' before then. The effect was to have
3223 incorrect size information for certain domains.
3225 45. #include "config.h" was missing at the start of the crypt16.c module. This
3226 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3229 46. If there was a timeout during a "random" callout check, Exim treated it as
3230 a failure of the random address, and carried on sending RSET and the real
3231 address. If the delay was just some slowness somewhere, the response to the
3232 original RCPT would be taken as a response to RSET and so on, causing
3233 mayhem of various kinds.
3235 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3236 when I implemented it. It didn't allow for the fact that some option values
3237 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3238 the right test for positive values.
3240 48. Domain names in DNS records are case-independent. Exim always looks them up
3241 in lower case. Some resolvers return domain names in exactly the case they
3242 appear in the zone file, that is, they may contain uppercase letters. Not
3243 all resolvers do this - some return always lower case. Exim was treating a
3244 change of case by a resolver as a change of domain, similar to a widening
3245 of a domain abbreviation. This triggered its re-routing code and so it was
3246 trying to route what was effectively the same domain again. This normally
3247 caused routing to fail (because the router wouldn't handle the domain
3248 twice). Now Exim checks for this case specially, and just changes the
3249 casing of the domain that it ultimately uses when it transmits the message
3252 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3255 50. If a filter generated a file delivery with a non-absolute name (possible if
3256 no home directory exists for the router), the forbid_file option was not
3259 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3260 the existing equality matching.
3262 52. Exim was using ints instead of ino_t variables in some places where it was
3263 dealing with inode numbers.
3265 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3266 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3267 called TMPDIR, and if it finds it is different, it changes its value.
3269 54. The smtp_printf() function is now made available to local_scan() so
3270 additional output lines can be written before returning. There is also an
3271 smtp_fflush() function to enable the detection of a dropped connection.
3272 The variables smtp_input and smtp_batched_input are exported to
3275 55. Changed the default runtime configuration: the message "Unknown user"
3276 has been removed from the ACL, and instead placed on the localuser router,
3277 using the cannot_route_message feature. This means that any verification
3278 failures that generate their own messages won't get overridden. Similarly,
3279 the "Unrouteable address" message that was in the ACL for unverifiable
3280 relay addresses has also been removed.
3282 56. Added hosts_avoid_esmtp to the smtp transport.
3284 57. The exicyclog script was not checking for the esoteric option
3285 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3286 will work only if exicyclog is run under the appropriate euid.
3288 58. Following a discussion on the list, the rules by which Exim recognises line
3289 endings on incoming messages have been changed. The -dropcr and drop_cr
3290 options are now no-ops, retained only for backwards compatibility. The
3291 following line terminators are recognized: LF CRLF CR. However, special
3292 processing applies to CR:
3294 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3295 nor a local message in the state where . is a terminator.
3297 (ii) If a bare CR is encountered in a header line, an extra space is added
3298 after the line terminator so as not to end the header. The reasoning
3299 behind this is that bare CRs in header lines are most likely either
3300 to be mistakes, or people trying to play silly games.
3302 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3303 was being incorrectly given as 18 bytes larger than it should have been.
3304 This is a VOB (very old bug).
3306 60. This may never have affected anything current, but just in case it has:
3307 When the local host is found other than at the start of a list of hosts,
3308 the local host, those with the same MX, and any that follow, are discarded.
3309 When the list in question was part of a longer list of hosts, the following
3310 hosts (not currently being processed) were also being discarded. This no
3311 longer happens. I'm not sure if this situation could ever has previously
3314 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3317 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3318 header. This is something that is recommended in a new Internet Draft, and
3319 is something that is documented as being done by Sendmail. There are two
3320 possible values. For messages generated by the autoreply transport, Exim
3323 Auto-Submitted: auto-replied
3325 whereas for all other generated messages (e.g. bounces) it adds
3327 Auto-Submitted: auto-generated
3329 63. The "personal" condition in filters now includes a test for the
3330 Auto-Submitted: header. If it contains the string "auto-" the message it
3331 not considered personal.
3333 64. Added rcpt_include_affixes as a generic transport option.
3335 65. Added queue_only_override (default true).
3337 66. Added the syslog_duplication option.
3339 67. If what should have been the first header line of a message consisted of
3340 a space followed by a colon, Exim was mis-interpreting it as a header line.
3341 It isn't of course - it is syntactically invalid and should therefore be
3342 treated as the start of the message body. The misbehaviour could have
3343 caused a number of strange effects, including loss of data in subsequent
3344 header lines, and spool format errors.
3346 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3347 client host had authenticated. This control can now be exercised by an ACL
3348 for more flexibility.
3350 69. By default, callouts do not happen when testing with -bh. There is now a
3351 variant, -bhc, which does actually run the callout code, including
3352 consulting and updating the callout cache.
3354 70. Added support for saslauthd authentication, courtesy of Alexander
3357 71. If statvfs() failed on the spool or log directories while checking their
3358 size for availability, Exim confusingly gave the error "space shortage".
3359 Furthermore, in debugging mode it crashed with a floating point exception.
3360 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3361 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3362 serious problem, Exim now writes to the main and panic logs when this
3363 happens, with details of the failure. It then refuses to accept the
3364 incoming message, giving the message "spool directory problem" or "log
3365 directory problem" with a 421 code for SMTP messages.
3367 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3368 0, 1, and 2 exist, because some OS complain for execs without them (see
3369 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3370 descriptors. However, the code omitted to check that the open succeeded,
3371 causing mysterious errors if for some reason the permissions on /dev/null
3372 got screwed. Now Exim writes a message to the main and panic logs, and
3373 bombs out if it can't open /dev/null.
3375 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3376 interact so that it is all more flexible. It is supposed to remain
3377 backwards compatible. Also added extra_local_interfaces.
3379 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3380 to bomb out with an assertion failure - to the client this appears as a
3381 connection drop. This problem occurs in the part of the code that was taken
3382 from the Samba project. Fortunately, the assertion is in a very simple
3383 function, so I have fixed this by reproducing the function inline in the
3384 one place where it is called, and arranging for authentication to fail
3385 instead of killing the process with assert().
3387 75. The SPA client code was not working when the server requested OEM rather
3388 than Unicode encoding.
3390 76. Added code to make require_files with a specific uid setting more usable in
3391 the case where statting the file as root fails - usually a non-root-mounted
3392 NFS file system. When this happens and the failure is EACCES, Exim now
3393 forks a subprocess and does the per-uid checking as the relevant uid.
3395 77. Added process_log_path.
3397 78. If log_file_path was not explicitly set, a setting of check_log_space or
3398 check_log_inodes was ignored.
3400 79. If a space check for the spool or log partitions fails, the incident is now
3401 logged. Of course, in the latter case the data may get lost...
3403 80. Added the %p formatting code to string_format() so that it can be used to
3404 print addresses in debug_print(). Adjusted all the address printing in the
3405 debugging in store.c to use %p rather than %d.
3407 81. There was a concern that a line of code in smtp_in.c could overflow a
3408 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3409 initially expressed, the concern was not well-founded, because trailing
3410 spaces are removed early. However, if the trailing spaces were followed by
3411 a NULL, they did not get removed, so the overflow was possible. Two fixes
3414 (a) I re-wrote the offending code in a cleaner fashion.
3415 (b) If an incoming SMTP command contains a NULL character, it is rejected
3418 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3419 runs initgroups(), so that if the Exim user is in any additional groups,
3420 they will be used during message reception.
3426 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob