1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.236 2005/09/19 11:56:11 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TK/01 Added the "success_on_redirect" address verification option. See
10 NewStuff for rationale and an example.
12 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
14 PH/02 Patch to exigrep to allow it to work on syslog lines.
16 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
17 fread() to skip over the body file's header line, because in Cygwin the
18 header line is locked and is inaccessible.
20 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
21 co-exist for some time) to make it clear that it is the Exim ID that is
22 referenced, not the Message-ID: header line.
24 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
25 string_format() function, because snprintf() does not exist on all
28 PH/06 The use of forbid_filter_existstest now also locks out the use of the
29 ${stat: expansion item.
31 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
32 protocol synchronization error", to keep the pedants happy.
34 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
35 well as for IRIX systems, when gcc is being used. See the host.c source
38 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
40 PH/10 Named domain lists were not working if used in a queue_smtp_domains
43 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
44 transport and to the smtp transport in LMTP mode.
46 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
48 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
49 run a filter in a subprocess. This could lead to confusion in subsequent
50 lookups in the parent process. There should also be a search_tidyup() at
51 the end of the subprocess.
53 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
54 only if the host matched helo_try_verify_hosts, which caused the
55 verification to occur when the EHLO/HELO command was issued. The ACL just
56 tested the remembered result. Now, if a previous verification attempt has
57 not happened, "verify = helo" does it there and then.
59 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
61 TK/03 Fix log output including CR from clamd.
63 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
64 exist provoked a memory error which could cause a segfault.
66 PH/15 Installed PCRE 6.2
68 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
70 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
71 of the problem. Specifically, suggested +O2 rather than +O1 for the
74 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
76 PH/20 If a delivery was routed to a non-standard port by means of an SRV
77 record, the port was not correctly logged when the outgoing_port log
78 selector was set (it logged the transort's default port).
80 PH/21 Added support for host-specific ports to manualroute, queryprogram,
81 fallback_hosts, and "hosts" in the smtp transport.
83 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
84 host errors such as "Connection refused".
86 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
87 authentication with radiusclient 0.4.9:
89 - Error returned from rc_read_config was caught wrongly
90 - Username/password not passed on to radius server due to wrong length.
92 The presumption is that some radiusclient API changes for 4.51/PH/17
93 were not taken care of correctly. The code is still untested by me (my
94 Linux distribution still has 0.3.2 of radiusclient), but it was
95 contributed by a Radius user.
97 PH/24 When doing a callout, the value of $domain wasn't set correctly when
98 expanding the "port" option of the smtp transport.
100 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
101 while reading a MIME header. Thanks to Tom Hughes for a patch.
103 PH/24 Include config.h inside local_scan.h so that configuration settings are
106 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
107 that in an ACL for RCPT (for example), you can examine exactly what was
110 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
111 commands, but it was not correctly comparing the address with the actual
112 client host address. Thus, it would show the EHLO address in Received:
113 header lines when this was not necessary.
115 PH/27 Added the % operator to ${eval:}.
117 PH/28 Exim tries to create and chdir to its spool directory when it starts;
118 it should be ignoring failures (because with -C, for example, it has lost
119 privilege). It wasn't ignoring creation failures other than "already
122 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
125 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
126 because an input line was too long, either on its own, or by virtue of
127 too many continuations, the temporary file was not being removed, and the
128 return code was incorrect.
130 PH/31 Missing "BOOL" in function definition in filtertest.c.
132 PH/32 Applied Sieve patches from the maintainer.
134 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
136 PH/33 Added "verify = not_blind".
138 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
139 Local/Makefile (with some defaults set). These are used in built scripts
140 such as exicyclog, but they have never been used in the exim_install
141 script (though there are many overriding facilities there). I have
142 arranged that the exim_install script now takes note of these two
145 PH/35 Installed configuration files for Dragonfly.
147 PH/36 When a locally submitted message by a trusted user did not contain a
148 From: header, and the sender address was obtained from -f or from an SMTP
149 MAIL command, and the trusted user did not use -F to supply a sender
150 name, $originator_name was incorrectly used when constructing a From:
151 header. Furthermore, $originator_name was used for submission mode
152 messages from external hosts without From: headers in a similar way,
153 which is clearly wrong.
155 PH/37 Added control=suppress_local_fixups.
157 PH/38 When log_selector = +received_sender was set, and the addition of the
158 sender made the log line's construction buffer exactly full, or one byte
159 less than full, an overflow happened when the terminating "\n" was
162 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
163 when the result of a list match is failure because a DNS lookup failed.
165 PH/40 RM_COMMAND is now used in the building process.
167 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
168 the "build-* directories that it finds.
170 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
171 address in a domain literal was a prefix of an interface address.
173 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
174 when verifying a sender address, unless rewrite_headers is false.
176 PH/44 Wrote a long comment about why errors_to addresses are verified as
177 recipients, not senders.
179 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
180 the ratelimit ACL was added.
182 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
184 PH/46 Added extra information about PostgreSQL errors to the error string.
186 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
187 avoiding the need to install special zones in a real server. This is
188 backwards compatible; if it can't find the fake resolver, it drops back.
189 Thus, both old and new test suites can be run.
191 TF/02 Added util/ratelimit.pl
193 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
194 clock is set back in time.
196 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
197 Candler <B.Candler@pobox.com>.
199 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
200 OK for addresses that are the result of redirections.
202 PH/48 A number of further additions for the benefit of the new test suite,
203 including a fake gethostbyname() that interfaces to the fake DNS resolver
206 TF/06 The fix for widen_domains has also been applied to qualify_single and
207 search_parents which are the other dnslookup options that can cause
210 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
217 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
219 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
220 command itself ended in error, the underlying message about the transport
221 filter timeout was being overwritten with the pipe command error. Now the
222 underlying error message should be appended to the second error message.
224 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
226 PH/02 Reduce the amount of output that "make" produces by default. Full output
227 can still be requested.
229 PH/03 The warning log line about a condition test deferring for a "warn" verb
230 was being output only once per connection, rather than after each
231 occurrence (because it was using the same function as for successful
232 "warn" verbs). This seems wrong, so I have changed it.
234 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
235 it should not have, which might have caused a crash in the right
236 circumstances, but probably never did.
238 PH/04 Installed a modified version of Tony Finch's patch to make submission
239 mode fix the return path as well as the Sender: header line, and to
240 add a /name= option so that you can make the user's friendly name appear
243 TF/03 Added the control = fakedefer ACL modifier.
245 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
246 Mark Lowes for thorough testing.
248 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
250 TK/03 Merged latest SRS patch from Miles Wilton.
252 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
253 with the definition in sysexits.h (which is #included earlier).
254 Fortunately, Exim does not actually use EX_OK. The code used to try to
255 preserve the sysexits.h value, by assumimg that macro definitions were
256 scanned for macro replacements. I have been disabused of this notion,
257 so now the code just undefines EX_OK before #including unistd.h.
259 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
260 in the smtp transport. When a block could not be written in a single
261 write() function, the timeout was being re-applied to each part-write.
262 This seems wrong - if the receiver was accepting one byte at a time it
263 would take for ever. The timeout is now adjusted when this happens. It
264 doesn't have to be particularly precise.
266 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
267 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
269 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
270 without a domain if the check to <postmaster@domain> fails.
272 SC/01 Eximstats: added -xls and the ability to specify output files
273 (patch written by Frank Heydlauf).
275 SC/02 Eximstats: use FileHandles for outputing results.
277 SC/03 Eximstats: allow any combination of xls, txt, and html output.
279 SC/04 Eximstats: fixed display of large numbers with -nvr option
281 SC/05 Eximstats: fixed merging of reports with empty tables.
283 SC/06 Eximstats: added the -include_original_destination flag
285 SC/07 Eximstats: removed tabs and trailing whitespace.
287 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
289 TK/06 MBOX spool code: Add real "From " MBOX separator line
290 so the .eml file is really in mbox format (even though
291 most programs do not really care). Patch from Alex Miller.
293 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
294 The latter is generated from $received_to and is only set if the
295 message has one envelope recipient. SA can use these headers,
296 obviously out-of-the-box. Patch from Alex Miller.
298 PH/08 The ${def test on a variable was returning false if the variable's
299 value was "0", contrary to what the specification has always said!
300 The result should be true unless the variable is empty.
302 PH/09 The syntax error of a character other than { following "${if
303 def:variable_name" (after optional whitespace) was not being diagnosed.
304 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
305 accidental colon was present, for example, could give incorrect results.
307 PH/10 Tidied the code in a number of places where the st_size field of a stat()
308 result is used (not including appendfile, where other changes are about
311 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
312 This involved changing a lot of size variables from int to off_t. It
313 should work with maildirs and everything.
315 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
316 spamd dying while we are connected to it.
318 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
321 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
322 function for BDB 4.3.
324 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
326 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
327 the sources for PCRE have been re-arranged and more files are now
330 PH/15 The code I had for printing potentially long long variables in PH/11
331 above was not the best (it lost precision). The length of off_t variables
332 is now inspected at build time, and an appropriate printing format (%ld
333 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
334 to be "long long int" or "long int". This is needed for the internal
335 formatting function string_vformat().
337 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
338 the configuration file to be ":syslog", then the script "guesses" where
339 the logs files are, rather than using the compiled in default. In our
340 case the guess is not the same as the compiled default, so the script
341 suddenly stopped working when I started to use syslog. The patch checks
342 to see if log_file_path is "". If so, it attempts to read it from exim
343 with no configuration file to get the compiled in version, before it
344 falls back to the previous guessing code."
346 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
347 implementing BATV in an Exim configuration. See NewStuff for the gory
350 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
351 Makefile that are specific to HP-UX.
353 PH/18 If the "use_postmaster" option was set for a recipient callout together
354 with the "random" option, the postmaster address was used as the MAIL
355 FROM address for the random test, but not for the subsequent recipient
356 test. It is now used for both.
358 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
359 patch removes a few documentation additions to RFC 3028, because the
360 latest draft now contains them. It adds the new en;ascii-case comparator
361 and a new error check for 8bit text in MIME parts. Comparator and
362 require names are now matched exactly. I enabled the subaddress
363 extension, but it is not well tested yet (read: it works for me)."
365 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
366 rework some of the code of TK/09 above to avoid the hardwired use of
367 "%lld" and "long long". Replaced the call to snprintf() with a call to
370 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
371 records point to non-existent hosts", "retry timeout exceeded", and
372 "retry time not reached for any host after a long failure period".
374 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
375 experimental DomainKeys support:
377 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
378 (2) On an error such as an illegally used "control", the wrong name for
379 the control was given.
381 These problems did NOT occur unless DomainKeys support was compiled.
383 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
385 PH/24 Added ${if match_ip condition.
387 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
388 databases so that it will be absolutely obvious if a crash occurs in the
389 DB library. This is a regular occurrence (often caused by mis-matched
392 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
393 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
394 picked up on a user's system that detects such things. There doesn't seem
395 to be a gcc warning option for this - only an attribute that has to be
396 put on the function's prototype. It seems that in Fedora Core 4 they have
397 set this on a number of new functions. No doubt there will be more in due
400 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
401 specify a transport. However, if an address that was verified by such a
402 router was the subject of a callout, Exim crashed because it tried to
403 read the rcpt_include_affixes from the non-existent transport. Now it
404 just assumes that the setting of that option is false. This bug was
405 introduced by 4.51/PH/31.
407 PH/28 Changed -d+all to exclude +memory, because that information is very
408 rarely of interest, but it makes the output a lot bigger. People tend to
409 do -d+all out of habit.
411 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
412 code in os-type was giving problems when libc.so lives in lib64, like on
415 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
416 aren't the modern standard, and it seems that some systems' include files
417 don't always have them. Exim was already checking for some of the newer
418 ones like T_AAAA, and defining it itself. I've added checks for all the
419 record types that Exim uses.
421 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
422 not automatically generating a new one, as it is supposed to. This
423 prevented TLS from working. If the file did exist, but contained invalid
424 data, a new version was generated, as expected. It was only the case of a
425 non-existent file that was broken.
427 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
428 with a change in libdomainkeys > 0.64.
430 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
431 from DNS. If the selector record carries the flag, it now has
432 precedence over the domain-wide flag.
434 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
436 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
437 the use of a port name that isn't defined in /etc/services) occurred, the
438 message was deferred as in a normal delivery, and thus remained on the
439 spool, instead of being failed because of the mua_wrapper setting. This
440 is now fixed, and I tidied up some of the mua_wrapper messages at the
443 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
444 the messages in a hash of arrays rather than using individual hashes.
445 This is a bit cleaner and results in dramatic memory savings, albeit
446 at a slight CPU cost.
448 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
449 as requested by Marc Sherman.
451 SC/10 Eximstats: added histograms for user specified patterns as requested
454 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
456 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
457 fopen() in the content-scanning modules that did not already have it.
463 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
464 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
466 TK/02 Fix ACL "control" statement not being available in MIME ACL.
468 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
470 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
471 to test Sieve filters that use "vacation".
473 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
474 that changes the way the GnuTLS parameters are stored in the cache file.
475 The new format can be generated externally. For backward compatibility,
476 if the data in the cache doesn't make sense, Exim assumes it has read an
477 old-format file, and it generates new data and writes a new file. This
478 means that you can't go back to an older release without removing the
481 PH/03 A redirect router that has both "unseen" and "one_time" set does not
482 work if there are any delivery delays because "one_time" forces the
483 parent to be marked "delivered", so its unseen clone is never tried
484 again. For this reason, Exim now forbids the simultaneous setting of
487 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
488 redirected to themselves ("homonym" addresses). Read the long ChangeLog
489 entry if you want to know the details. The fix, however, neglected to
490 consider the case when local delivery batching is involved. The test for
491 "previously delivered" was not happening when checking to see if an
492 address could be batched with a previous (undelivered) one; under
493 certain circumstances this could lead to multiple deliveries to the same
496 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
497 in its include files, and this causes problems building Exim.
499 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
500 header_syntax) but Exim was just ignoring anything given after a slash.
501 In particular, this caused confusion with an attempt to use "verify =
502 reverse_host_lookup/defer_ok". An error is now given when options are
503 supplied for verify items that do not have them. (Maybe reverse_host_
504 lookup should have a defer_ok option, but that's a different point.)
506 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
507 defined by RFC 821) to 2048, because there were problems with some AUTH
508 commands, and RFC 1869 says the size should be increased for extended
509 SMTP commands that take arguments.
511 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
514 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
515 "unknown" error; now it says that the functionality isn't in the binary.
517 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
518 an address' error message when a string expansion fails (syntax or
519 whatever). Otherwise the password may appear in the log. Following change
520 PH/42 below, there is no longer a chance of it appearing in a bounce
523 PH/11 Installed exipick version 20050225.0 from John Jetmore.
525 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
526 of its addresses was ever tried. (Bugzilla bug #2.)
528 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
529 the result incorrectly in the debug output. (It correctly added a newline
530 to what was transported.)
532 TF/01 Added $received_time.
534 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
535 commented out examples of how to interface to a virus scanner and to
536 SpamAssassin. Also added commented examples of av_scanner and
537 spamd_address settings.
539 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
540 and controls are allowed in which ACLs. There were a couple of minor
541 errors. Some of the entries in the conditions table (which is a table of
542 where they are NOT allowed) were getting very unwieldy; rewrote them as a
543 negation of where the condition IS allowed.
545 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
547 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
548 header file does not have a version number, so I've had to invent a new
549 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
550 API. The code is untested by me (my Linux distribution still has 0.3.2 of
551 radiusclient), but it was contributed by a Radius user.
553 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
554 files or directories, for OpenSSL.
556 PH/19 When an Exim process that is running as root has to create an Exim log
557 file, it does so in a subprocess that runs as exim:exim so as to get the
558 ownership right at creation (otherwise, other Exim processes might see
559 the file with the wrong ownership). There was no test for failure of this
560 fork() call, which would lead to the process getting stuck as it waited
561 for a non-existent subprocess. Forks do occasionally fail when resources
562 run out. I reviewed all the other calls to fork(); they all seem to check
565 PH/20 When checking for unexpected SMTP input at connect time (before writing
566 the banner), Exim was not dealing correctly with a non-positive return
567 from the read() function. If the client had disconnected by this time,
568 the result was a log entry for a synchronization error with an empty
569 string after "input=" when read() returned zero. If read() returned -1
570 (an event I could not check), uninitialized data bytes were printed.
571 There were reports of junk text (parts of files, etc) appearing after
574 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
576 PH/22 Added support for macro redefinition, and (re)definition in between
577 driver and ACL definitions.
579 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
580 forgetting to use the resulting value; it was using the unexpanded value.
582 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
583 hadn't been configured. The fix is from Juergen Kreileder, who
584 understands it better than I do:
586 "Here's what I see happening with three configured cyrus_sasl
587 authenticators configured (plain, login, cram-md5):
589 On startup auth_cyrus_sasl_init() gets called for each of these.
590 This means three calls to sasl_listmech() without a specified mech_list.
591 => SASL tests which mechs of all available mechs actually work
592 => three warnings about OTP not working
593 => the returned list contains: plain, login, cram-md5, digest-md5, ...
595 With the patch, sasl_listmech() also gets called three times. But now
596 SASL's mech_list option is set to the server_mech specified in the the
597 authenticator. Or in other words, the answer from sasl_listmech()
598 gets limited to just the mech you're testing for (which is different
600 => the return list contains just 'plain' or 'login', 'cram-md5' or
601 nothing depending on the value of ob->server_mech.
603 I've just tested the patch: Authentication still works fine,
604 unavailable mechs specified in the exim configuration are still
605 caught, and the auth.log warnings about OTP are gone."
607 PH/25 When debugging is enabled, the contents of the command line are added
608 to the debugging output, even when log_selector=+arguments is not
611 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
612 answer is "GNU", and only if the return is "GNU/something" is the answer
615 PH/27 $acl_verify_message is now set immediately after the failure of a
616 verification in an ACL, and so is available in subsequent modifiers. In
617 particular, the message can be preserved by coding like this:
619 warn !verify = sender
620 set acl_m0 = $acl_verify_message
622 Previously, $acl_verify_message was set only while expanding "message"
623 and "log_message" when a very denied access.
625 PH/28 Modified OS/os.c-Linux with
627 -#ifndef OS_LOAD_AVERAGE
628 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
630 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
631 nomenclature these days.)
633 PH/29 Installed patch from the Sieve maintainer that adds the options
634 sieve_useraddress and sieve_subaddress to the redirect router.
636 PH/30 In these circumstances:
637 . Two addresses routed to the same list of hosts;
638 . First host does not offer TLS;
639 . First host accepts first address;
640 . First host gives temporary error to second address;
641 . Second host offers TLS and a TLS session is established;
642 . Second host accepts second address.
643 Exim incorrectly logged both deliveries with the TLS parameters (cipher
644 and peerdn, if requested) that were in fact used only for the second
647 PH/31 When doing a callout as part of verifying an address, Exim was not paying
648 attention to any local part prefix or suffix that was matched by the
649 router that accepted the address. It now behaves in the same way as it
650 does for delivery: the affixes are removed from the local part unless
651 rcpt_include_affixes is set on the transport.
653 PH/32 Add the sender address, as F=<...>, to the log line when logging a
654 timeout during the DATA phase of an incoming message.
656 PH/33 Sieve envelope tests were broken for match types other than :is. I have
657 applied a patch sanctioned by the Sieve maintainer.
659 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
660 the uid or gid is negative. A case of a negative gid caused this to be
661 noticed. The fix allows for either to be negative.
663 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
664 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
667 PH/36 The change PH/12 above was broken. Fixed it.
669 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
670 the grounds that routing the same address twice would always produce the
671 same answer. This might have been true once, but it is certainly no
672 longer true now. Routing a child address may depend on the previous
673 routing that produced that child. Some complicated redirection strategies
674 went wrong when messages had multiple recipients, and made Exim's
675 behaviour dependent on the order in which the addresses were given.
677 I have moved the duplicate checking until after the routing is complete.
678 Exim scans the addresses that are assigned to local and remote
679 transports, and removes any duplicates. This means that more work will be
680 done, as duplicates will always all be routed, but duplicates are
681 presumably rare, so I don't expect this is of any significance.
683 For deliveries to pipes, files, and autoreplies, the duplicate checking
684 still happens during the routing process, since they are not going to be
687 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
688 It corrects a timeout issue with spamd. This is Ian's comment: "The
689 background is that sometimes spamd either never reads data from a
690 connection it has accepted, or it never writes response data. The exiscan
691 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
692 blindly assumes that writes won't block so it may never time out."
694 PH/39 Allow G after quota size as well as K and M.
696 PH/40 The value set for $authenticated_id in an authenticator may not contain
697 binary zeroes or newlines because the value is written to log lines and
698 to spool files. There was no check on this. Now the value is run through
699 the string_printing() function so that such characters are converted to
700 printable escape sequences.
702 PH/41 $message_linecount is a new variable that contains the total number of
703 lines in the message. Compare $body_linecount, which is the count for the
706 PH/42 Exim no longer gives details of delivery errors for specific addresses in
707 bounce and delay warning messages, except in certain special cases, which
710 (a) An SMTP error message from a remote host;
711 (b) A message specified in a :fail: redirection;
712 (c) A message specified in a "fail" command in a system filter;
713 (d) A message specified in a FAIL return from the queryprogram router;
714 (e) A message specified by the cannot_route_message router option.
716 In these cases only, Exim does include the error details in bounce and
717 warning messages. There are also a few cases where bland messages such
718 as "unrouteable address" or "local delivery error" are given.
720 PH/43 $value is now also set for the "else" part of a ${run expansion.
722 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
723 being worked on, but at least Exim now implements the latest version to
726 PH/45 In a pipe transport, although a timeout while waiting for the pipe
727 process to complete was treated as a delivery failure, a timeout while
728 writing the message to the pipe was logged, but erroneously treated as a
729 successful delivery. Such timeouts include transport filter timeouts. For
730 consistency with the overall process timeout, these timeouts are now
731 treated as errors, giving rise to delivery failures by default. However,
732 there is now a new Boolean option for the pipe transport called
733 timeout_defer, which, if set TRUE, converts the failures into defers for
734 both kinds of timeout. A transport filter timeout is now identified in
737 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
738 systems where "make" and "gmake" are different, calling "gmake" at top
739 level broke things. I've arranged for the value of $(MAKE) to be passed
740 from the Makefile to this script so that it can call the same version of
744 A note about Exim versions 4.44 and 4.50
745 ----------------------------------------
747 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
748 changes of various kinds. As a consequence, a big documentation update was
749 needed. This delayed the release for rather longer than seemed good, especially
750 in the light of a couple of (minor) security issues. Therefore, the changes
751 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
752 release. So 4.44 and 4.50 are in effect two different branches that both start
755 I have left the 4.50 change log unchanged; it contains all the changes since
756 4.43. The change log for 4.44 is below; many of its items are identical to
757 those for 4.50. This seems to be the most sensible way to preserve the
758 historical information.
764 1. Minor wording change to the doc/README.SIEVE file.
766 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
767 computation of the current number of files was incorrect.
769 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
770 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
773 4. Give more explanation in the error message when the command for a transport
774 filter fails to execute.
776 5. There are several places where Exim runs a non-Exim command in a
777 subprocess. The SIGUSR1 signal should be disabled for these processes. This
778 was being done only for the command run by the queryprogram router. It is
779 now done for all such subprocesses. The other cases are: ${run, transport
780 filters, and the commands run by the lmtp and pipe transports.
782 6. Added CONFIGURE_GROUP build-time option.
784 7. Some older OS have a limit of 256 on the maximum number of file
785 descriptors. Exim was using setrlimit() to set 1000 as a large value
786 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
787 systems. I've change it so that if it can't get 1000, it tries for 256.
789 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
790 was an oversight, and furthermore, ever since the addition of extra
791 controls (e.g. 4.43/32), the checks on when to allow different forms of
792 "control" were broken. There should now be diagnostics for all cases when a
793 control that does not make sense is encountered.
795 9. Added the /retain_sender option to "control=submission".
797 10. $recipients is now available in the predata ACL (oversight).
799 11. Tidy the search cache before the fork to do a delivery from a message
800 received from the command line. Otherwise the child will trigger a lookup
801 failure and thereby defer the delivery if it tries to use (for example) a
802 cached ldap connection that the parent has called unbind on.
804 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
805 of $address_data from the recipient verification was clobbered by the
808 13. The value of address_data from a sender verification is now available in
809 $sender_address_data in subsequent conditions in the ACL statement.
811 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
813 15. Added a new option "connect=<time>" to callout options, to set a different
816 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
817 was its contents. (It was OK if the option was not defined at all.)
819 17. A "Completed" log line is now written for messages that are removed from
820 the spool by the -Mrm option.
822 18. New variables $sender_verify_failure and $recipient_verify_failure contain
823 information about exactly what failed.
825 19. Added -dd to debug only the daemon process.
827 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
828 handles timeouts, both on the server side and network timeouts. Renamed the
829 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
831 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
832 It is now set to "smtps".
834 22. $host_address is now set to the target address during the checking of
837 23. When checking ignore_target_hosts for an ipliteral router, no host name was
838 being passed; this would have caused $sender_host_name to have been used if
839 matching the list had actually called for a host name (not very likely,
840 since this list is usually IP addresses). A host name is now passed as
843 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
844 code that specifies a non-restarting handler (typically sigaction() in
845 modern systems) in an attempt to fix a rare and obscure crash bug.
847 25. Narrowed the window for a race in the daemon that could cause it to ignore
848 SIGCHLD signals. This is not a major problem, because they are used only to
849 wake it up if nothing else does.
851 26. A malformed maildirsize file could cause Exim to calculate negative values
852 for the mailbox size or file count. Odd effects could occur as a result.
853 The maildirsize information is now recalculated if the size or filecount
856 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
857 support for a long time. Removed HAVE_SYS_VFS_H.
859 28. Installed the latest version of exipick from John Jetmore.
861 29. In an address list, if the pattern was not a regular expression, an empty
862 subject address (from a bounce message) matched only if the pattern was an
863 empty string. Non-empty patterns were not even tested. This was the wrong
864 because it is perfectly reasonable to use an empty address as part of a
865 database query. An empty address is now tested by patterns that are
866 lookups. However, all the other forms of pattern expect the subject to
867 contain a local part and a domain, and therefore, for them, an empty
868 address still always fails if the pattern is not itself empty.
870 30. Exim went into a mad DNS loop when attempting to do a callout where the
871 host was specified on an smtp transport, and looking it up yielded more
874 31. Re-factored the code for checking spool and log partition space into a
875 function that finds that data and another that does the check. The former
876 is then used to implement four new variables: $spool_space, $log_space,
877 $spool_inodes, and $log_inodes.
879 32. The RFC2047 encoding function was originally intended for short strings
880 such as real names; it was not keeping to the 75-character limit for
881 encoded words that the RFC imposes. It now respects the limit, and
882 generates multiple encoded words if necessary. To be on the safe side, I
883 have increased the buffer size for the ${rfc2047: expansion operator from
886 33. It is now permitted to omit both strings after an "if" condition; if the
887 condition is true, the result is "true". As before, when the second string
888 is omitted, a false condition yields an empty string. This makes it less
889 cumbersome to write custom ACL and router conditions.
891 34. Failure to deliver a bounce message always caused it to be frozen, even if
892 there was an errors_to setting on the router. The errors_to setting is now
895 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
896 canonical form (fully expanded) before being placed in
897 $sender_host_address.
899 36. The table in the code that translates DNS record types into text (T_A to
900 "A" for instance) was missing entries for NS and CNAME. It is just possible
901 that this could have caused confusion if both these types were looked up
902 for the same domain, because the text type is used as part of Exim's
903 per-process caching. But the chance of anyone hitting this buglet seems
906 37. The dnsdb lookup has been extended in a number of ways.
908 (1) There is a new type, "zns", which walks up the domain tree until it
909 finds some nameserver records. It should be used with care.
911 (2) There is a new type, "mxh", which is like "mx" except that it returns
912 just the host names, not the priorities.
914 (3) It is now possible to give a list of domains (or IP addresses) to be
915 looked up. The behaviour when one of the lookups defers can be
916 controlled by a keyword.
918 (4) It is now possible to specify the separator character for use when
919 multiple records are returned.
921 38. The dnslists ACL condition has been extended: it is now possible to supply
922 a list of IP addresses and/or domains to be looked up in a particular DNS
925 39. Added log_selector=+queue_time_overall.
927 40. When running the queue in the test harness, wait just a tad after forking a
928 delivery process, to get repeatability of debugging output.
930 41. Include certificate and key file names in error message when GnuTLS fails
931 to set them up, because the GnuTLS error message doesn't include the name
932 of the failing file when there is a problem reading it.
934 42. Allow both -bf and -bF in the same test run.
936 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
938 44. The "Exiscan patch" is now merged into the mainline Exim source.
940 45. Sometimes the final signoff response after QUIT could fail to get
941 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
942 < 0 before doing a fflush(). This bug looks as though it goes back to the
943 introduction of TLS in release 3.20, but "sometimes" must have been rare
944 because the tests only now provoked it.
946 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
947 (this can affect the format of dates).
949 47. exim_tidydb, when checking for the continued existence of a message for
950 which it has found a message-specific retry record, was not finding
951 messages that were in split spool directories. Consequently, it was
952 deleting retry records that should have stayed in existence.
954 48. Steve fixed some bugs in eximstats.
956 49. The SPA authentication driver was not abandoning authentication and moving
957 on to the next authenticator when an expansion was forced to fail,
958 contradicting the general specification for all authenticators. Instead it
959 was generating a temporary error. It now behaves as specified.
961 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
962 (the order specifies the preference for clients). The order is now AES256,
963 AES128, 3DES, ARCFOUR128.
965 51. Small patch to Sieve code - explicitly set From: when generating an
968 52. Exim crashed if a remote delivery caused a very long error message to be
969 recorded - for instance if somebody sent an entire SpamAssassin report back
970 as a large number of 550 error lines. This bug was coincidentally fixed by
971 increasing the size of one of Exim's internal buffers (big_buffer) that
972 happened as part of the Exiscan merge. However, to be on the safe side, I
973 have made the code more robust (and fixed the comments that describe what
976 53. Now that there can be additional text after "Completed" in log lines (if
977 the queue_time_overall log selector is set), a one-byte patch to exigrep
978 was needed to allow it to recognize "Completed" as not the last thing in
981 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
982 patch that reportedly fixes this has been added. I am not expert enough to
983 create a test for it. This is what the patch creator wrote:
985 "I found a little strange behaviour of ldap code when working with
986 Windows 2003 AD Domain, where users was placed in more than one
987 Organization Units. When I tried to give exim partial DN, the exit code
988 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
989 But simultaneously result of request was absolutely normal ldap result,
990 so I produce this patch..."
992 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
993 REFERENCE, so I have modified the code to exclude the patch when that macro
996 55. Some experimental protocols are using DNS PTR records for new purposes. The
997 keys for these records are domain names, not reversed IP addresses. The
998 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
999 leaves it alone. Component reversal etc. now happens only for IP addresses.
1002 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1004 57. Double the size of the debug message buffer (to 2048) so that more of very
1005 long debug lines gets shown.
1007 58. The exicyclog utility now does better if the number of log files to keep
1008 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1010 59. Two changes related to the smtp_active_hostname option:
1012 (1) $smtp_active_hostname is now available as a variable.
1013 (2) The default for smtp_banner uses $smtp_active_hostname instead
1014 of $primary_hostname.
1016 60. The host_aton() function is supposed to be passed a string that is known
1017 to be a valid IP address. However, in the case of IPv6 addresses, it was
1018 not checking this. This is a hostage to fortune. Exim now panics and dies
1019 if the condition is not met. A case was found where this could be provoked
1020 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1021 components; fortuitously, this particular loophole had already been fixed
1022 by change 4.50/55 above.
1024 If there are any other similar loopholes, the new check in host_aton()
1025 itself should stop them being exploited. The report I received stated that
1026 data on the command line could provoke the exploit when Exim was running as
1027 exim, but did not say which command line option was involved. All I could
1028 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1029 running as the user.
1032 61. There was a buffer overflow vulnerability in the SPA authentication code
1033 (which came originally from the Samba project). I have added a test to the
1034 spa_base64_to_bits() function which I hope fixes it.
1037 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1038 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1040 63. The daemon start-up calls getloadavg() while still root for those OS that
1041 need the first call to be done as root, but it missed one case: when
1042 deliver_queue_load_max is set with deliver_drop_privilege. This is
1043 necessary for the benefit of the queue runner, because there is no re-exec
1044 when deliver_drop_privilege is set.
1046 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1047 This has been fixed.
1049 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1050 was in use, was not putting the data itself into the right store pool;
1051 consequently, it could be overwritten for a subsequent message in the same
1052 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1055 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1057 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1058 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1059 the function were treating the return as a boolean value, which happened to
1060 work because 0=false and not-0=true, but is not correct code.
1062 68. The host_aton() function was not handling scoped IPv6 addresses (those
1063 with, for example, "%eth0" on the end) correctly.
1065 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1066 negated items (that is, ~something) in unsigned ints. Some compilers
1067 apparently mutter when there is no cast.
1069 70. If an address verification called from an ACL failed, and did not produce a
1070 user-specific message (i.e. there was only a "system" message), nothing was
1071 put in $acl_verify_message. In this situation, it now puts the system
1074 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1075 session; change 4.31/43 added the unwanted input to the log line - except
1076 that it did not do this in the start of session case. It now does.
1078 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1079 This is wrong and can cause the other end to generate a synchronization
1080 error if it is another Exim or anything else that does the synchronization
1081 check. A QUIT command is no longer sent after a timeout.
1083 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1084 during host lookups.
1086 74. The defer_ok option of callout verification was not working if it was used
1087 when verifying addresses in header lines, that is, for this case:
1089 verify = header_sender/callout=defer_ok
1091 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1092 those file descriptors could be used for SMTP connections. If anything
1093 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1094 could be sent to the SMTP client, causing chaos. The daemon now opens
1095 stdin, stdout, and stderr to /dev/null when it puts itself into the
1098 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1099 log by default. The user can override this with suitable Perl magic.
1101 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1102 the log message when discard triggers, was not working for the DATA ACL or
1103 for the non-SMTP ACL.
1105 78. Error message wording change in sieve.c.
1107 79. If smtp_accept_max_per_host was set, the number of connections could be
1108 restricted to fewer than expected, because the daemon was trying to set up
1109 a new connection before checking whether the processes handling previous
1110 connections had finished. The check for completed processes is now done
1111 earlier. On busy systems, this bug wouldn't be noticed because something
1112 else would have woken the daemon, and it would have reaped the completed
1115 80. If a message was submitted locally by a user whose login name contained one
1116 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1117 It caused a spool format error. I have fixed the spool reading code. A
1118 related problem was that the "from" clause in the Received: line became
1119 illegal because of the space(s). It is now covered by ${quote_local_part.
1121 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1124 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1126 83. Patch from Sieve maintainer to fix unterminated string problem in
1127 "vacation" handling.
1129 84. Some minor changes to the Linux configuration files to help with other
1130 OS variants using glibc.
1132 85. One more patch for Sieve to update vacation handling to latest spec.
1135 ----------------------------------------------------
1136 See the note above about the 4.44 and 4.50 releases.
1137 ----------------------------------------------------
1143 1. Change 4.43/35 introduced a bug that caused file counts to be
1144 incorrectly computed when quota_filecount was set in an appendfile
1147 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1148 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1151 3. Give more explanation in the error message when the command for a transport
1152 filter fails to execute.
1154 4. There are several places where Exim runs a non-Exim command in a
1155 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1156 was being done only for the command run by the queryprogram router. It is
1157 now done for all such subprocesses. The other cases are: ${run, transport
1158 filters, and the commands run by the lmtp and pipe transports.
1160 5. Some older OS have a limit of 256 on the maximum number of file
1161 descriptors. Exim was using setrlimit() to set 1000 as a large value
1162 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1163 systems. I've change it so that if it can't get 1000, it tries for 256.
1165 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1166 was an oversight, and furthermore, ever since the addition of extra
1167 controls (e.g. 4.43/32), the checks on when to allow different forms of
1168 "control" were broken. There should now be diagnostics for all cases when a
1169 control that does not make sense is encountered.
1171 7. $recipients is now available in the predata ACL (oversight).
1173 8. Tidy the search cache before the fork to do a delivery from a message
1174 received from the command line. Otherwise the child will trigger a lookup
1175 failure and thereby defer the delivery if it tries to use (for example) a
1176 cached ldap connection that the parent has called unbind on.
1178 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1179 of $address_data from the recipient verification was clobbered by the
1180 sender verification.
1182 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1183 was its contents. (It was OK if the option was not defined at all.)
1185 11. A "Completed" log line is now written for messages that are removed from
1186 the spool by the -Mrm option.
1188 12. $host_address is now set to the target address during the checking of
1189 ignore_target_hosts.
1191 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1192 being passed; this would have caused $sender_host_name to have been used if
1193 matching the list had actually called for a host name (not very likely,
1194 since this list is usually IP addresses). A host name is now passed as
1197 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1198 code that specifies a non-restarting handler (typically sigaction() in
1199 modern systems) in an attempt to fix a rare and obscure crash bug.
1201 15. Narrowed the window for a race in the daemon that could cause it to ignore
1202 SIGCHLD signals. This is not a major problem, because they are used only to
1203 wake it up if nothing else does.
1205 16. A malformed maildirsize file could cause Exim to calculate negative values
1206 for the mailbox size or file count. Odd effects could occur as a result.
1207 The maildirsize information is now recalculated if the size or filecount
1210 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1211 support for a long time. Removed HAVE_SYS_VFS_H.
1213 18. Updated exipick to current release from John Jetmore.
1215 19. Allow an empty sender to be matched against a lookup in an address list.
1216 Previously the only cases considered were a regular expression, or an
1219 20. Exim went into a mad DNS lookup loop when doing a callout where the
1220 host was specified on the transport, if the DNS lookup yielded more than
1223 21. The RFC2047 encoding function was originally intended for short strings
1224 such as real names; it was not keeping to the 75-character limit for
1225 encoded words that the RFC imposes. It now respects the limit, and
1226 generates multiple encoded words if necessary. To be on the safe side, I
1227 have increased the buffer size for the ${rfc2047: expansion operator from
1230 22. Failure to deliver a bounce message always caused it to be frozen, even if
1231 there was an errors_to setting on the router. The errors_to setting is now
1234 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1235 canonical form (fully expanded) before being placed in
1236 $sender_host_address.
1238 24. Updated eximstats to version 1.33
1240 25. Include certificate and key file names in error message when GnuTLS fails
1241 to set them up, because the GnuTLS error message doesn't include the name
1242 of the failing file when there is a problem reading it.
1244 26. Expand error message when OpenSSL has problems setting up cert/key files.
1247 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1248 (this can affect the format of dates).
1250 28. exim_tidydb, when checking for the continued existence of a message for
1251 which it has found a message-specific retry record, was not finding
1252 messages that were in split spool directories. Consequently, it was
1253 deleting retry records that should have stayed in existence.
1255 29. eximstats updated to version 1.35
1256 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1257 1.35 - bugfix such that pie charts by volume are generated correctly
1259 30. The SPA authentication driver was not abandoning authentication and moving
1260 on to the next authenticator when an expansion was forced to fail,
1261 contradicting the general specification for all authenticators. Instead it
1262 was generating a temporary error. It now behaves as specified.
1264 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1265 (the order specifies the preference for clients). The order is now AES256,
1266 AES128, 3DES, ARCFOUR128.
1268 31. Small patch to Sieve code - explicitly set From: when generating an
1271 32. Exim crashed if a remote delivery caused a very long error message to be
1272 recorded - for instance if somebody sent an entire SpamAssassin report back
1273 as a large number of 550 error lines. This bug was coincidentally fixed by
1274 increasing the size of one of Exim's internal buffers (big_buffer) that
1275 happened as part of the Exiscan merge. However, to be on the safe side, I
1276 have made the code more robust (and fixed the comments that describe what
1279 33. Some experimental protocols are using DNS PTR records for new purposes. The
1280 keys for these records are domain names, not reversed IP addresses. The
1281 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1282 leaves it alone. Component reversal etc. now happens only for IP addresses.
1285 34. The host_aton() function is supposed to be passed a string that is known
1286 to be a valid IP address. However, in the case of IPv6 addresses, it was
1287 not checking this. This is a hostage to fortune. Exim now panics and dies
1288 if the condition is not met. A case was found where this could be provoked
1289 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1290 components; fortuitously, this particular loophole had already been fixed
1291 by change 4.50/55 or 4.44/33 above.
1293 If there are any other similar loopholes, the new check in host_aton()
1294 itself should stop them being exploited. The report I received stated that
1295 data on the command line could provoke the exploit when Exim was running as
1296 exim, but did not say which command line option was involved. All I could
1297 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1298 running as the user.
1301 35. There was a buffer overflow vulnerability in the SPA authentication code
1302 (which came originally from the Samba project). I have added a test to the
1303 spa_base64_to_bits() function which I hope fixes it.
1306 36. The daemon start-up calls getloadavg() while still root for those OS that
1307 need the first call to be done as root, but it missed one case: when
1308 deliver_queue_load_max is set with deliver_drop_privilege. This is
1309 necessary for the benefit of the queue runner, because there is no re-exec
1310 when deliver_drop_privilege is set.
1312 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1313 was in use, was not putting the data itself into the right store pool;
1314 consequently, it could be overwritten for a subsequent message in the same
1315 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1318 38. Sometimes the final signoff response after QUIT could fail to get
1319 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1320 < 0 before doing a fflush(). This bug looks as though it goes back to the
1321 introduction of TLS in release 3.20, but "sometimes" must have been rare
1322 because the tests only now provoked it.
1328 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1329 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1330 Now it returns an integer. A number of calls were still expecting a T/F
1331 return. Fortuitously, in all cases, the tests worked in OK situations,
1332 which is the norm. However, things would have gone wrong on any write
1333 failures on the smtp file descriptor. This function is used when sending
1334 messages over SMTP and also when doing verify callouts.
1336 2. When Exim is called to do synchronous delivery of a locally submitted
1337 message (the -odf or -odi options), it no longer closes stderr before doing
1340 3. Implemented the mua_wrapper option.
1342 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1344 5. Implemented the functions header_remove(), header_testname(),
1345 header_add_at_position(), and receive_remove_recipient(), and exported them
1348 6. If an ACL "warn" statement specified the addition of headers, Exim already
1349 inserted X-ACL-Warn: at the start if there was no header name. However, it
1350 was not making this test for the second and subsequent header lines if
1351 there were newlines in the string. This meant that an invalid header could
1352 be inserted if Exim was badly configured.
1354 7. Allow an ACL "warn" statement to add header lines at the start or after all
1355 the Received: headers, as well as at the end.
1357 8. Added the rcpt_4xx retry error code.
1359 9. Added postmaster_mailfrom=xxx to callout verification option.
1361 10. Added mailfrom=xxxx to the callout verification option, for verify=
1364 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1365 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1367 12. Inserted some casts to stop certain compilers warning when using pointer
1368 differences as field lengths or precisions in printf-type calls (mostly
1369 affecting debugging statements).
1371 13. Added optional readline() support for -be (dynamically loaded).
1373 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1374 same clock tick as a message's arrival, so that its received time was the
1375 same as the "first fail" time on the retry record, and that message
1376 remained on the queue past the ultimate address timeout, every queue runner
1377 would try a delivery (because it was past the ultimate address timeout) but
1378 after another failure, the ultimate address timeout, which should have then
1379 bounced the address, did not kick in. This was a "< instead of <=" error;
1380 in most cases the first failure would have been in the next clock tick
1381 after the received time, and all would be well.
1383 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1384 being recognized when the domain list was tested by the match_domain
1385 condition in an expansion string.
1387 16. Added the ${str2b64: operator.
1389 17. Exim was always calling setrlimit() to set a large limit for the number of
1390 processes, without checking whether the existing limit was already
1391 adequate. (It did check for the limit on file descriptors.) Furthermore,
1392 errors from getrlimit() and setrlimit() were being ignored. Now they are
1393 logged to the main and panic logs, but Exim does carry on, to try to do its
1394 job under whatever limits there are.
1396 18. Imported PCRE 5.0.
1398 19. Trivial typo in log message " temporarily refused connection" (the leading
1401 20. If the log selector return_path_on_delivery was set and an address was
1402 redirected to /dev/null, the delivery process crashed because it assumed
1403 that a return path would always be set for a "successful" delivery. In this
1404 case, the whole delivery is bypassed as an optimization, and therefore no
1407 21. Internal re-arrangement: the function for sending a challenge and reading
1408 a response while authentication was assuming a zero-terminated challenge
1409 string. It's now changed to take a pointer and a length, to allow for
1410 binary data in such strings.
1412 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1414 23. Exim was not respecting finduser_retries when seeking the login of the
1415 uid under which it was called; it was always trying 10 times. (The default
1416 setting of finduser_retries is zero.) Also, it was sleeping after the final
1417 failure, which is pointless.
1419 24. Implemented tls_on_connect_ports.
1421 25. Implemented acl_smtp_predata.
1423 26. If the domain in control=submission is set empty, Exim assumes that the
1424 authenticated id is a complete email address when it generates From: or
1425 Sender: header lines.
1427 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1428 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1429 chown and chgrp in /bin and hostname in /usr/bin.
1431 28. Exim was keeping the "process log" file open after each use, just as it
1432 does for the main log. This opens the possibility of it remaining open for
1433 long periods when the USR1 signal hits a daemon. Occasional processlog
1434 errors were reported, that could have been caused by this. Anyway, it seems
1435 much more sensible not to leave this file open at all, so that is what now
1438 29. The long-running daemon process does not normally write to the log once it
1439 has entered its main loop, and it closes the log before doing so. This is
1440 so that log files can straightforwardly be renamed and moved. However,
1441 there are a couple of unusual error situations where the daemon does write
1442 log entries, and I had neglected to close the log afterwards.
1444 30. The text of an SMTP error response that was received during a remote
1445 delivery was being truncated at 512 bytes. This is too short for some of
1446 the long messages that one sometimes sees. I've increased the limit to
1449 31. It is now possible to make retry rules that apply only when a message has a
1450 specific sender, in particular, an empty sender.
1452 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1453 it possible to be selective about when SMTP synchronization is enforced.
1455 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1457 32. Implemented hosts_connection_nolog.
1459 33. Added an ACL for QUIT.
1461 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1464 35. Added mailbox_size and mailbox_filecount to appendfile.
1466 36. Added control = no_multiline_responses to ACLs.
1468 37. There was a bug in the logic of the code that waits for the clock to tick
1469 in the case where the clock went backwards by a substantial amount such
1470 that the microsecond fraction of "now" was more than the microsecond
1471 fraction of "then" (but the whole seconds number was less).
1473 38. Added support for the libradius Radius client library this is found on
1474 FreeBSD (previously only the radiusclient library was supported).
1480 1. When certain lookups returned multiple values in the form name=value, the
1481 quoting of the values was not always being done properly. Specifically:
1482 (a) If the value started with a double quote, but contained no whitespace,
1484 (b) If the value contained whitespace other than a space character (i.e.
1485 tabs or newlines or carriage returns) it was not quoted.
1486 This fix has been applied to the mysql and pgsql lookups by writing a
1487 separate quoting function and calling it from the lookup code. The fix
1488 should probably also be applied to nisplus, ibase and oracle lookups, but
1489 since I cannot test any of those, I have not disturbed their existing code.
1491 2. A hit in the callout cache for a specific address caused a log line with no
1492 reason for rejecting RCPT. Now it says "Previous (cached) callout
1493 verification failure".
1495 3. There was an off-by-one bug in the queryprogram router. An over-long
1496 return line was truncated at 256 instead of 255 characters, thereby
1497 overflowing its buffer with the terminating zero. As well as fixing this, I
1498 have increased the buffer size to 1024 (and made a note to document this).
1500 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1501 when Exim is waiting for an SMTP response from a remote server, Exim
1502 restarts its select() call on the socket, thereby resetting its timeout.
1503 This is not a problem when such interrupts are rare. Somebody set up a cron
1504 job to run exiwhat every 2 minutes, which is less than the normal select()
1505 timeout (5 or 10 minutes). This meant that the select() timeout never
1506 kicked in because it was always reset. I have fixed this by comparing the
1507 time when an interrupt arrives with the time at the start of the first call
1508 to select(). If more time than the timeout has elapsed, the interrupt is
1509 treated as a timeout.
1511 5. Some internal re-factoring in preparation for the addition of Sieve
1512 extensions (by MH). In particular, the "personal" test is moved to a
1513 separate function, and given an option for scanning Cc: and Bcc: (which is
1514 not set for Exim filters).
1516 6. When Exim created an email address using the login of the caller as the
1517 local part (e.g. when creating a From: or Sender: header line), it was not
1518 quoting the local part when it contained special characters such as @.
1520 7. Installed new OpenBSD configuration files.
1522 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1523 try to make them clearer.
1525 9. Callout options, other than the timeout value, were being ignored when
1526 verifying sender addresses in header lines. For example, when using
1528 verify = header_sender/callout=no_cache
1530 the cache was (incorrectly) being used.
1532 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1533 only the Cygwin environment.
1535 11. When return_path_on_delivery was set as a log selector, if different remote
1536 addresses in the same message used different return paths and parallel
1537 remote delivery occurred, the wrong values would sometimes be logged.
1538 (Whenever a remote delivery process finished, the return path value from
1539 the most recently started remote delivery process was logged.)
1541 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1542 lines when AUTH and/or TLS are in use. This is the "received protocol"
1543 field. Exim used to use "asmtp" for authenticated SMTP, without any
1544 indication (in the protocol name) for TLS use. Now it follows the RFC and
1545 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1546 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1547 names appear in log lines as well as in Received: header lines.
1549 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1550 extensions, and comparison tests, and to fix some bugs.
1552 14. Changes to the "personal" filter test:
1554 (1) The test was buggy in that it was just doing the equivalent of
1555 "contains" tests on header lines. For example, if a user's address was
1556 anne@some.where, the "personal" test would incorrectly be true for
1558 To: susanne@some.where
1560 This test is now done by extracting each address from the header in turn,
1561 and checking the entire address. Other tests that are part of "personal"
1562 are now done using regular expressions (for example, to check local parts
1563 of addresses in From: header lines).
1565 (2) The list of non-personal local parts in From: addresses has been
1566 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1567 taken from the Sieve specification recommendations.
1569 (3) If the message contains any header line starting with "List-" it is
1570 treated as non-personal.
1572 (4) The test for "circular" in the Subject: header line has been removed
1573 because it now seems ill-conceived.
1575 15. Minor typos in src/EDITME comments corrected.
1577 16. Installed latest exipick from John Jetmore.
1579 17. If headers_add on a router specified a text string that was too long for
1580 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1581 of string_sprintf() is now avoided.
1583 18. $message_body_size was not set (it was always zero) when running the DATA
1584 ACL and the local_scan() function.
1586 19. For the "mail" command in an Exim filter, no default was being set for
1587 the once_repeat time, causing a random time value to be used if "once" was
1588 specified. (If the value happened to be <= 0, no repeat happened.) The
1589 default is now 0s, meaning "never repeat". The "vacation" command was OK
1590 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1591 (I found it when inspecting the code).
1593 20. There is now an overall timeout for performing a callout verification. It
1594 defaults to 4 times the callout timeout, which applies to individual SMTP
1595 commands during the callout. The overall timeout applies when there is more
1596 than one host that can be tried. The timeout is checked before trying the
1597 next host. This prevents very long delays if there are a large number of
1598 hosts and all are timing out (e.g. when the network connections are timing
1599 out). The value of the overall timeout can be changed by specifying an
1600 additional sub-option for "callout", called "maxwait". For example:
1602 verify = sender/callout=5s,maxwait=20s
1604 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1605 to the end before writing, but this should make it even safer).
1607 22. Exim was forgetting that it had advertised PIPELINING for the second and
1608 subsequent messages on an SMTP connection. It was also not resetting its
1609 memory on STARTTLS and an internal HELO.
1611 23. When Exim logs an SMTP synchronization error within a session, it now
1612 records whether PIPELINING has been advertised or not.
1614 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1615 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1616 rather than long int.
1618 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1620 26. Added the never_mail option to autoreply.
1626 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1627 crash if the getsockname() call failed; this can happen if a connection is
1628 closed very soon after it is established. The problem was simply in the
1629 order in which certain operations were done, causing Exim to try to write
1630 to the SMTP stream before it had set up the file descriptor. The bug has
1631 been fixed by making things happen in the correct order.
1637 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1638 before the connection was closed, thus losing the rejection response.
1640 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1641 some early Solaris releases, but causes trouble in current releases where
1642 socklen_t is defined.
1644 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1647 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1650 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1651 that releasing the top of it at the end releases what was used for sub-
1652 expansions (unless the block got too big). However, discard this block if
1653 the first thing is a variable or header, so that we can use its block when
1654 it is dynamic (useful for very large $message_headers, for example).
1656 6. Lookups now cache *every* query, not just the most recent. A new, separate
1657 store pool is used for this. It can be recovered when all lookup caches are
1658 flushed. Lookups now release memory at the end of their result strings.
1659 This has involved some general refactoring of the lookup sources.
1661 7. Some code has been added to the store_xxx() functions to reduce the amount
1662 of flapping under certain conditions.
1664 8. log_incoming_interface used to affect only the <= reception log lines. Now
1665 it causes the local interface and port to be added to several more SMTP log
1666 lines, for example "SMTP connection from", and rejection lines.
1668 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1670 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1672 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1673 could be overwritten at the end of the current message (or the start of a
1674 new message if it was set in a HELO ACL). The value is now preserved for
1675 the duration of the SMTP connection.
1677 12. If a transport had a headers_rewrite setting, and a matching header line
1678 contained an unqualified address, that address was qualified, even if it
1679 did not match any rewriting rules. The underlying bug was that the values
1680 of the flags that permit the existence of unqualified sender and recipient
1681 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1682 non-local messages, and by -bnq for local messages) were not being
1683 preserved with the message after it was received.
1685 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1686 "next input=" as part of the text comprising the host identity instead of
1687 the correct text. The code was using the same buffer for two different
1688 strings. However, depending on which order the printing function evaluated
1689 its arguments, the bug did not always show up. Under Linux, for example, my
1690 test suite worked just fine.
1692 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1693 doesn't work with some older versions of Perl. It has been changed to "my",
1694 which in any case is probably the better facility to use.
1696 15. A really picky compiler found some instances of statements for creating
1697 error messages that either had too many or two few arguments for the format
1700 16. The size of the buffer for calls to the DNS resolver has been increased
1701 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1702 for addresses that have a lot of PTR records. This alleviates a problem; it
1703 does not fully solve it.
1705 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1706 buffer now truncates the list and logs the incident, which is the same
1707 action as happens when Exim is looking up a host name and its aliases.
1708 Previously in this situation something unpredictable would happen;
1709 sometimes it was "internal error: store_reset failed".
1711 18. If a server dropped the connection unexpectedly when an Exim client was
1712 using GnuTLS and trying to read a response, the client delivery process
1713 crashed while trying to generate an error log message.
1715 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1716 string, for example:
1718 warn message = H1: something\nH2: something
1720 the text was added as a single header line from Exim's point of view
1721 though it ended up OK in the delivered message. However, searching for the
1722 second and subsequent header lines using $h_h2: did not work. This has been
1723 fixed. Similarly, if a system filter added multiple headers in this way,
1724 the routers could not see them.
1726 20. Expanded the error message when iplsearch is called with an invalid key to
1727 suggest using net-iplsearch in a host list.
1729 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1730 ACLs are no longer actually imposed (and a message to that effect is
1733 22. If a "gecos" field in a passwd entry contained escaped characters, in
1734 particular, if it contained a \" sequence, Exim got it wrong when building
1735 a From: or a Sender: header from that name. A second bug also caused
1736 incorrect handling when an unquoted " was present following a character
1737 that needed quoting.
1739 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1740 was not being matched caselessly.
1742 24. Arranged for all hyphens in the exim.8 source to be escaped with
1745 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1746 properly. Recipient callout cache records were still being keyed to include
1747 the sender, even when use_sender was set false. This led to far more
1748 callouts that were necessary. The sender is no longer included in the key
1749 when use_sender is false.
1751 26. Added "control = submission" modifier to ACLs.
1753 27. Added the ${base62d: operator to decode base 62 numbers.
1755 28. dnsdb lookups can now access SRV records.
1757 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1758 the configuration file.
1760 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1761 (-v) mode. This makes the output for a verbose queue run more intelligible.
1763 31. Added a use_postmaster feature to recipient callouts.
1765 32. Added the $body_zerocount variable, containing the number of binary zero
1766 bytes in the message body.
1768 33. The time of last modification of the "new" subdirectory is now used as the
1769 "mailbox time last read" when there is a quota error for a maildir
1772 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1774 35. Added +ignore_unknown as a special item in host lists.
1776 36. Code for decoding IPv6 addresses in host lists is now included, even if
1777 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1778 address was recognized as an IP address, but was then not correctly decoded
1779 into binary, causing unexpected and incorrect effects when compared with
1786 1. Very minor rewording of debugging text in manualroute to say "list of
1787 hosts" instead of "hostlist".
1789 2. If verify=header_syntax was set, and a header line with an unqualified
1790 address (no domain) and a large number of spaces between the end of the
1791 name and the colon was received, the reception process suffered a buffer
1792 overflow, and (when I tested it) crashed. This was caused by some obsolete
1793 code that should have been removed. The fix is to remove it!
1795 3. When running in the test harness, delay a bit after writing a bounce
1796 message to get a bit more predictability in the log output.
1798 4. Added a call to search_tidyup() just before forking a reception process. In
1799 theory, someone could use a lookup in the expansion of smtp_accept_max_
1800 per_host which, without the tidyup, could leave open a database connection.
1802 5. Added the variables $recipient_data and $sender_data which get set from a
1803 lookup success in an ACL "recipients" or "senders" condition, or a router
1804 "senders" option, similar to $domain_data and $local_part_data.
1806 6. Moved the writing of debug_print from before to after the "senders" test
1809 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1810 problems for message scanning, either using a data ACL, or using
1811 local_scan() because the Received: header was not generated till after they
1812 were called (in order to set the time as the time of reception completion).
1813 I have revised the way this works. The header is now generated after the
1814 body is received, but before the ACL or local_scan() are called. After they
1815 are run, the timestamp in the header is updated.
1821 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1822 before starting a queue runner without re-exec. This happened only when
1823 deliver_drop_privilege was set or when the Exim user was set to root. The
1824 effect of the bug was that timeouts during subsequent deliveries caused
1825 crashes instead of being properly handled. The handler is now left at its
1826 default (and expected) setting.
1828 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1829 message, again when deliver_drop_privilege is set or Exim is run as root.
1830 The bug described in (1) was not present in this case, but the tidying up
1831 of the other signals was missing. I have made the two cases consistent.
1833 3. The ignore_target_hosts setting on a manualroute router was being ignored
1834 for hosts that were looked up using the /MX notation.
1836 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1839 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1840 operated on the sender address. After changing the $sender_address to <>
1841 for the sender address verify, Exim was re-instated it as the original
1842 (before rewriting) address, but remembering that it had rewritten it, so it
1843 wasn't rewriting it again. This bug also had the effect of breaking the
1844 sender address verification caching when the sender address was rewritten.
1846 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1847 This has been changed so that if the ip literal address matches
1848 ignore_target_hosts, the router declines.
1850 7. Added expansion conditions match_domain, match_address, and match_local_
1851 part (NOT match_host).
1853 8. The placeholder for the Received: header didn't have a length field set.
1855 9. Added code to Exim itself and to exim_lock to test for a specific race
1856 condition that could lead to file corruption when using MBX delivery. The
1857 issue is with the lockfile that is created in /tmp. If this file is removed
1858 after a process has opened it but before that process has acquired a lock,
1859 there is the potential for a second process to recreate the file and also
1860 acquire a lock. This could lead to two Exim processes writing to the file
1861 at the same time. The added code performs the same test as UW imapd; it
1862 checks after acquiring the lock that its file descriptor still refers to
1863 the same named file.
1865 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1866 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1869 11. Added the smtp_active_hostname option. If used, this will typically be made
1870 to depend on the incoming interface address. Because $interface_address is
1871 not set up until the daemon has forked a reception process, error responses
1872 that can happen earlier (such as "too many connections") no longer contain
1875 12. If an expansion in a condition on a "warn" statement fails because a lookup
1876 defers, the "warn" statement is abandoned, and the next ACL statement is
1877 processed. Previously this caused the whole ACL to be aborted.
1879 13. Added the iplsearch lookup type.
1881 14. Added ident_timeout as a log selector.
1883 15. Added tls_certificate_verified as a log selector.
1885 16. Added a global option tls_require_ciphers (compare the smtp transport
1886 option of the same name). This controls incoming TLS connections.
1888 17. I finally figured out how to make tls_require_ciphers do a similar thing
1889 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1890 before starting the TLS session.
1892 18. Tabs are now shown as \t in -bP output.
1894 19. If the log selector return_path_on_delivery was set, Exim crashed when
1895 bouncing a message because it had too many Received: header lines.
1897 20. If two routers both had headers_remove settings, and the first one included
1898 a superfluous trailing colon, the final name in the first list and the
1899 first name in the second list were incorrectly joined into one item (with a
1900 colon in the middle).
1906 1. Added -C and -D options to the exinext utility, mainly to make it easier
1907 to include in the automated testing, but these could be helpful when
1908 multiple configurations are in use.
1910 2. The exinext utility was not formatting the output nicely when there was
1911 an alternate port involved in the retry record key, nor when there was a
1912 message id as well (for retries that were specific to a specific message
1913 and a specific host). It was also confused by IPv6 addresses, because of
1914 the additional colons they contain. I have fixed the IPv4 problem, and
1915 patched it up to do a reasonable job for IPv6.
1917 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1918 delivery, the log line now contains "pipelined" if PIPELINING was used.
1920 4. An SMTP transport process used to panic and die if the bind() call to set
1921 an explicit outgoing interface failed. This has been changed; it is now
1922 treated in the same way as a connect() failure.
1924 5. A reference to $sender_host_name in the part of a conditional expansion
1925 that was being skipped was still causing a DNS lookup. This no longer
1928 6. The def: expansion condition was not recognizing references to header lines
1929 that used bh_ and bheader_.
1931 7. Added the _cache feature to named lists.
1933 8. The code for checking quota_filecount in the appendfile transport was
1934 allowing one more file than it should have been.
1936 9. For compatibility with Sendmail, the command line option
1944 and sets the incoming protocol and host name (for trusted callers). The
1945 host name and its colon can be omitted when only the protocol is to be set.
1946 Note the Exim already has two private options, -pd and -ps, that refer to
1947 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1948 "s", but I don't think that's a major issue.
1950 10. A number of refactoring changes to the code, none of which should affect
1953 (a) The number of logging options was getting close to filling up the
1954 32-bit word that was used as a bit map. I have split them into two classes:
1955 those that are passed in the argument to log_write(), and those that are
1956 only ever tested independently outside of that function. These are now in
1957 separate 32-bit words, so there is plenty of room for expansion again.
1958 There is no change in the user interface or the logging behaviour.
1960 (b) When building, for example, log lines, the code previously used a
1961 macro that called string_cat() twice, in order to add two strings. This is
1962 not really sufficiently general. Furthermore, there was one instance where
1963 it was actually wrong because one of the argument was used twice, and in
1964 one call a function was used. (As it happened, calling the function twice
1965 did not affect the overall behaviour.) The macro has been replaced by a
1966 function that can join an arbitrary number of extra strings onto a growing
1969 (c) The code for expansion conditions now uses a table and a binary chop
1970 instead of a serial search (which was left over from when there were very
1971 few conditions). Also, it now recognizes conditions like "pam" even when
1972 the relevant support is not compiled in: a suitably worded error message is
1973 given if an attempt is made to use such a condition.
1975 11. Added ${time_interval:xxxxx}.
1977 12. A bug was causing one of the ddress fields not to be passed back correctly
1978 from remote delivery subprocesses. The field in question was not being
1979 subsequently used, so this caused to problems in practice.
1981 13. Added new log selectors queue_time and deliver_time.
1983 14. Might have fixed a bug in maildirsizefile handling that threw up
1984 "unexpected character" debug warnings, and recalculated the data
1985 unnecessarily. In any case, I expanded the warning message to give more
1988 15. Added the message "Restricted characters in address" to the statements in
1989 the default ACL that block characters like @ and % in local parts.
1991 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
1992 Three changes have been made:
1994 (a) There was a serious bug; a negative response to MAIL caused the whole
1995 recipient domain to be cached as invalid, thereby blocking all messages
1996 to all local parts at the same domain, from all senders. This bug has
1997 been fixed. The domain is no longer cached after a negative response to
1998 MAIL if the sender used is not empty.
2000 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2003 (c) A new callout option, "use_sender" has been added for people who want
2004 the modified behaviour.
2010 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2013 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2014 indeed breaks things for older releases.
2016 3. Added additional logging to the case where there is a problem reading data
2017 from a filter that is running in a subprocess using a pipe, in order to
2018 try to track down a specific problem.
2020 4. Testing facility fudge: when running in the test harness and attempting
2021 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2022 getting "No route to host". Convert this to a timeout.
2024 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2027 6. Some OS don't have socklen_t but use size_t instead. This affects the
2028 fifth argument of getsockopt() amongst other things. This is now
2029 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2030 can be set for individual OS. I have set it for SunOS5, OSF1, and
2031 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2032 some earlier ones do not.
2034 7. Change 4.30/15 was not doing the test caselessly.
2036 8. The standard form for an IPv6 address literal was being rejected by address
2037 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2038 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2039 this, as well as the form without the "IPv6" on the front (but only when
2040 address literals are enabled, of course).
2042 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2044 10. Exim crashed if a message with an empty sender address specified by -f
2045 encountered a router with an errors_to setting. This could be provoked only
2046 by a command such as
2050 where an empty string was supplied; "<>" did not hit this bug.
2052 11. Installed PCRE release 4.5.
2054 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2055 remained set. It is now erased.
2057 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2058 times from message ids (which are base 36 rather than the normal 62).
2060 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2061 were being counted as actual protocol errors, and logged if the log
2062 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2063 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2064 and DATA following a set of rejected RCPTs do not count as protocol errors.
2065 In other words, Exim assumes they were pipelined, though this may not
2066 actually be the case. Of course, in all cases the client gets an
2067 appropriate error code.
2069 15. If a lookup fails in an ACL condition, a message about the failure may
2070 be available; it is used if testing the ACL cannot continue, because most
2071 such messages specify what the cause of the deferral is. However, some
2072 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2073 that caused an old message to be retained and used if a later statement
2074 caused a defer, replacing the real cause of the deferral.
2076 16. If an IP address had so many PTR records that the DNS lookup buffer
2077 was not large enough to hold them, Exim could crash while trying to process
2078 the truncated data. It now detects and logs this case.
2080 17. Further to 4.21/58, another change has been made: if (and only if) the
2081 first line of a message (the first header line) ends with CRLF, a bare LF
2082 in a subsequent header line has a space inserted after it, so as not to
2083 terminate the header.
2085 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2086 unnecessarily, used atoi() instead of strtol(), and didn't check the
2087 termination when getting file sizes from file names by regex.
2089 19. Completely re-implemented the support for maildirsize files, in the light
2090 of a number of problems with the previous contributed implementation
2091 (4.30/29). In particular:
2093 . If the quota is zero, the maildirsize file is maintained, but no quota is
2096 . If the maildir directory does not exist, it is created before any attempt
2097 to write a maildirsize file.
2099 . The quota value in the file is just a cache; if the quota is changed in
2100 the transport, the new value overrides.
2102 . A regular expression is available for excluding directories from the
2105 20. The autoreply transport checks the characters in options that define the
2106 message's headers; it allows continued headers, but it was checking with
2107 isspace() after an embedded newline instead of explicitly looking for a
2110 21. If all the "regular" hosts to which an address was routed had passed their
2111 expiry times, and had not reached their retry times, the address was
2112 bounced, even if fallback hosts were defined. Now Exim should go on to try
2115 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2116 equivalent code in the SMTP transport. Some hosts send humungous responses
2117 to HELO/EHLO, more than 1024 it seems.
2119 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2120 gives compiler warnings in some environments. I've now done it "properly",
2123 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2124 (because of problems with the built-in one) was declared to return uschar *
2125 instead of char *, causing compiler failure.
2127 25. Fixed a file descriptor leak when processing alias/forward files.
2129 26. Fixed a minor format string issue in dbfn.c.
2131 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2133 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2134 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2137 29. When a sender address is verified, it is cached, to save repeating the test
2138 when there is more than one recipient in a message. However, when the
2139 verification involves a callout, it is possible for different callout
2140 options to be set for different recipients. It is too complicated to keep
2141 track of this in the cache, so now Exim always runs a verification when a
2142 callout is required, relying on the callout cache for the optimization.
2143 The overhead is duplication of the address routing, but this should not be
2146 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2147 to be verified with callout=postmaster, and the main callout worked but the
2148 postmaster check failed, the verification correctly failed. However, if a
2149 subsequent RCPT command asked for sender verification *without* the
2150 postmaster check, incorrect caching caused this verification also to fail,
2153 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2154 it was not caching the DNS options (qualify_single, search_parents) that
2155 were used when the lookup failed. A subsequent lookup with different
2156 options therefore always gave the same answer, though there were cases
2157 where it should not have. (Example: a "domains = !$mx_any" option on a
2158 dnslookup router: the "domains" option is always processed without any
2159 widening, but the router might have qualify_single set.) Now Exim uses the
2160 cached value only when the same options are set.
2162 32. Added John Jetmore's "exipick" utility to the distribution.
2164 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2165 than a timeout (e.g. a certificate is required, and is not provided), an
2166 Exim server now closes the connection immediately. Previously it waited for
2167 the client to close - but if the client is SSL, it seems that they each
2168 wait for each other, leading to a delay before one of them times out.
2170 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2171 maintained 0.8.x compatibility because I don't think many are using it, and
2172 it is clearly obsolete.
2174 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2177 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2178 client certificate was expired. A simple patch fixes this, though I don't
2179 understand the full logic of why the verify callback is called multiple
2182 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2183 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2184 which causes problems with some clients (such as the Certicom SSL Plus
2185 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2186 disables the coutermeasure allowing Eudora to connect."
2188 38. Exim was not checking that a write() to a log file succeeded. This could
2189 lead to Bad Things if a log got too big, in particular if it hit a file
2190 size limit. Exim now panics and dies if it cannot write to a log file, just
2191 as it does if it cannot open a log file.
2193 39. Modified OS/Makefile-Linux so that it now contains
2195 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2197 The two -D definitions ensure that Exim is compiled with large file
2198 support, which makes it possible to handle log files that are bigger than
2201 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2202 instance) a domain was checked against a named list that involved a lookup,
2203 causing $domain_data to be set, then another domain was checked against the
2204 same list, then the first domain was re-checked, the value of $domain_data
2205 after the final check could be wrong. In particular, if the second check
2206 failed, it could be set empty. This bug probably also applied to
2209 41. The strip_trailing_dot option was not being applied to the address given
2210 with the -f command-line option.
2212 42. The code for reading a message's header from the spool was incrementing
2213 $received_count, but never initializing it. This meant that the value was
2214 incorrect (doubled) while delivering a message in the same process in which
2215 it was received. In the most common configuration of Exim, this never
2216 happens - a fresh exec is done - but it can happen when
2217 deliver_drop_privilege is set.
2219 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2220 it now includes up to 150 characters of the unexpected data in the log
2223 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2224 and building data strings. The size of both of these buffers was 10 000
2225 bytes - far larger than anybody would *ever* want, thought I. Needless to
2226 say, somebody hit the limit. I have increased the maximum line length to
2227 20 000 and the maximum data length of concatenated lines to 100 000. I have
2228 also fixed two bugs, because there was no checking on these buffers. Tsk,
2229 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2230 buffer is too small.
2232 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2233 lsearch lookups. Now it does.
2235 46. When parsing a route_list item in a manualroute router, a fixed-length
2236 buffer was used for the list of hosts. I made this 1024 bytes long,
2237 thinking that nobody would ever have a list of hosts that long. Wrong.
2238 Somebody had a whole pile of complicated expansion conditions, and the
2239 string was silently truncated, leading to an expansion error. It turns out
2240 that it is easier to change to an unlimited length (owing to other changes
2241 that have happened since this code was originally written) than to build
2242 structure for giving a limitation error. The length of the item that
2243 expands into the list of hosts is now unlimited.
2245 47. The lsearch lookup could not handle data where the length of text line was
2246 more than 4095 characters. Such lines were truncated, leading to shortened
2247 data being returned. It should now handle lines of any length.
2249 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2250 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2253 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2254 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2255 no longer happens in comment lines. A list of replacements is now placed
2256 at the head of all of the source files, except those whose only change is
2257 to replace PERL_COMMAND in the very first #! line.
2259 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2260 messages on the queue, with a bottom-up merge sort, using code contributed
2261 by Michael Haardt. This should make operations like -bp somewhat faster on
2262 large queues. It won't affect queue runners, except when queue_run_in_order
2265 51. Installed eximstats 1.31 in the distribution.
2267 52. Added support for SRV lookups to the dnslookup router.
2269 53. If an ACL referred to $message_body or $message_body_end, the value was not
2270 reset for any messages that followed in the same SMTP session.
2272 54. The store-handling optimization for building very long strings was not
2273 differentiating between the different store pools. I don't think this
2274 actually made any difference in practice, but I've tidied it.
2276 55. While running the routers to verify a sender address, $sender_address
2277 was still set to the sender address. This is wrong, because when routing to
2278 send a bounce to the sender, it would be empty. Therefore, I have changed
2279 it so that, while verifying a sender address, $sender_address is set to <>.
2280 (There is no change to what happens when verifying a recipient address.)
2282 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2283 target A or AAAA records (if not already returned) without resetting the
2284 qualify_single or search_parents options of the DNS resolver. These are
2285 inappropriate in this case because the targets of MX and SRV records must
2286 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2287 target that, when qualified, matched something in the local domain. These
2288 two options are now turned off when doing these lookups.
2290 57. It seems that at least some releases of Reiserfs (which does not have the
2291 concept of a fixed number of inodes) returns zero and not -1 for the
2292 number of available inodes. This interacted badly with check_spool_inodes,
2293 which assumed that -1 was the "no such thing" setting. What I have done is
2294 to check that the total number of inodes is greater than zero before doing
2295 the test of how many are available.
2297 58. When a "warn" ACL statement has a log_message modifier, the message is
2298 remembered, and not repeated. This is to avoid a lot of repetition when a
2299 message has many recipients that cause the same warning to be written.
2300 Howewer, Exim was preserving the list of already written lines for an
2301 entire SMTP session, which doesn't seem right. The memory is now reset if a
2302 new message is started.
2304 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2305 debugging output unless log_rewrite was also set.
2307 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2308 of (int)(handle) when we know that handle contains (void *)(-1).
2310 61. The Exim daemon panic-logs an error return when it closes the incoming
2311 connection. However "connection reset by peer" seems to be common, and
2312 isn't really an error worthy of noting specially, so that particular error
2315 62. When Exim is trying to find all the local interfaces, it used to panic and
2316 die if the ioctl to get the interface flags failed. However, it seems that
2317 on at least one OS (Solaris 9) it is possible to have an interface that is
2318 included in the list of interfaces, but for which you get a failure error
2319 for this call. This happens when the interface is not "plumbed" into a
2320 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2321 failure of the "get flags" call assumes that the interface is down.
2323 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2324 makes life easier for people who are doing arithmetic on fields extracted
2325 from dates, where you often get leading zeros that should not be
2326 interpreted as octal.
2328 64. Added qualify_domain to the redirect router, to override the global
2331 65. If a pathologically long header line contained very many addresses (the
2332 report of this problem mentioned 10 000) and each of them was rewritten,
2333 Exim could use up a very large amount of memory. (It kept on making new
2334 copies of the header line as it rewrote, and never released the old ones.)
2335 At the expense of a bit more processing, the header rewriting function has
2336 been changed so that it no longer eats memory in this way.
2338 66. The generation of the Received: header has been moved from the time that a
2339 message starts to be received, to the time that it finishes. The timestamp
2340 in the Received: header should now be very close to that of the <= log
2341 line. There are two side-effects of this change:
2343 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2344 logged header lines no longer include the local Received: line, because
2345 it has not yet been created. The same applies to a copy of the message
2346 that is returned to a non-SMTP sender when a message is rejected.
2348 (b) When a filter file is tested using -bf, no additional Received: header
2349 is added to the test message. After some thought, I decided that this
2352 This change does not affect the value of $received_for. It is still set
2353 after address rewriting, but before local_scan() is called.
2355 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2357 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2358 gave an unhelpful panic error message, and a defer error. I have managed to
2359 change this behaviour so that it now rejects any supplied certificate,
2360 which seems right, as the list of acceptable certificates is empty.
2362 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2363 gave an unhelpful defer error. I have not managed to make this reject any
2364 supplied certificates, but the error message it gives is "no certificate
2365 supplied", which is not helpful.
2367 70. exigrep's output now also includes lines that are not associated with any
2368 message, but which match the given pattern. Implemented by a patch from
2369 Martin Sluka, which also tidied up the Perl a bit.
2371 71. Recipient callout verification, like sender verification, was using <> in
2372 the MAIL FROM command. This isn't really the right thing, since the actual
2373 sender may affect whether the remote host accepts the recipient or not. I
2374 have changed it to use the actual sender in the callout; this means that
2375 the cache record is now keyed on a recipient/sender pair, not just the
2376 recipient address. There doesn't seem to be a real danger of callout loops,
2377 since a callout by the remote host to check the sender would use <>.
2378 [SEE ABOVE: changed after hitting problems.]
2380 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2381 temporary errors. However, in the case of such a code being given after
2382 the end of a data transmission (i.e. after ".") Exim was failing to write
2383 a retry record for the message. (Yes, there was some broken host that was
2384 actually sending 8xx at this point.)
2386 73. An unknown lookup type in a host list could cause Exim to panic-die when
2387 the list was checked. (An example that provoked this was putting <; in the
2388 middle of a list instead of at the start.) If this happened during a DATA
2389 ACL check, a -D file could be left lying around. This kind of configuration
2390 error no longer causes Exim to die; instead it causes a defer errror. The
2391 incident is still logged to the main and panic logs.
2393 74. Buglet left over from Exim 3 conversion. The message "too many messages
2394 in one connection" was written to the rejectlog but not the mainlog, except
2395 when address rewriting (yes!) was being logged.
2397 75. Added write_rejectlog option.
2399 76. When a system filter was run not as root (that is, when system_filter_user
2400 was set), the values of the $n variables were not being returned to the
2401 main process; thus, they were not subsequently available in the $sn
2404 77. Added +return_path_on_delivery log selector.
2406 78. A connection timeout was being treated differently from recipients deferred
2407 when testing hosts_max_try with a message that was older than the host's
2408 retry timeout. (The host should not be counted, thus allowing all hosts to
2409 be tried at least once before bouncing.) This may have been the cause of an
2410 occasionally reported bug whereby a message would remain on the queue
2411 longer than the retry timeout, but would be bounced if a delivery was
2412 forced. I say "may" because I never totally pinned down the problem;
2413 setting up timeout/retry tests is difficult. See also the next item.
2415 79. The ultimate address timeout was not being applied to errors that involved
2416 a combination of host plus message (for example, a timeout on a MAIL
2417 command). When an address resolved to a number of possible hosts, and they
2418 were not all tried for each delivery (e.g. because of hosts_max_try), a
2419 message could remain on the queue longer than the retry timeout.
2421 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2424 81. Fixed an obscure SMTP outgoing bug which required at least the following
2425 conditions: (a) there was another message waiting for the same server;
2426 (b) the server returned 5xx to all RCPT commands in the first message so
2427 that the message was not completed; (c) the server dropped the connection
2428 or gave a negative response to the RSET that Exim sends to abort the
2429 transaction. The observed case was a dropped connection after DATA that had
2430 been sent in pipelining mode. That is, the server had advertised PIPELINING
2431 but was not implementing it correctly. The effect of the bug was incorrect
2432 behaviour, such as trying another host, and this could lead to a crash.
2438 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2439 and daemon.c were passed as pointers to ints; they should have been
2440 pointers to socklen_t variables (which are typically unsigned ints).
2442 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2445 3. Fixed a really odd bug that affected only the testing scheme; patching a
2446 certain fixed string in the binary changed the value of another string that
2447 happened to be identical to the end of the original first string.
2449 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2450 name", it returns that address as the IP address. On some operating
2451 systems (e.g. Solaris), it also passes back the IP address string as the
2452 "host name". However, on others (e.g. Linux), it passes back an empty
2453 string. Exim wasn't checking for this, and was changing the host name to an
2454 empty string, assuming it had been canonicized.
2456 5. Although rare, it is permitted to have more than one PTR record for a given
2457 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2458 all the names associated with an address, because they do in Solaris.
2459 However, it seems that they do not in Linux for data that comes from the
2460 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2461 I found this out when I moved to a new Linux workstation and tried to run
2462 the Exim test suite.
2464 To get round this problem I have changed the code so that it now does its
2465 own call to the DNS to look up PTR records when searching for a host name.
2466 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2467 addresses that are only in /etc/hosts are still found.
2469 This behaviour is, however, controlled by an option called host_lookup_
2470 order, which defaults to "bydns:byaddr". If people want to use the other
2471 order, or indeed, just use one or the other means of lookup, they can
2472 specify it in this variable.
2474 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2475 some operating systems, this comes back from gethostbyaddr() as an empty
2476 string, and this is what Exim used to test for. However, it seems that in
2477 other systems, "." is yielded. Exim now tests for this case too.
2479 7. The values of check_spool_space and check_log_space are now held internally
2480 as a number of kilobytes instead of an absolute number of bytes. If a
2481 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2482 kilobyte. This means that much larger values can be stored.
2484 8. Exim monitor: an attempt to get the action menu when not actually pointing
2485 at a message produces an empty menu entitled "No message selected". This
2486 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2487 no entries in it ("Shell widget menu has zero width and/or height"). So I
2488 have added a single, blank menu entry in this case.
2490 9. Added ${quote_local_part.
2492 10. MIME decoding is now applied to the contents of Subject: header lines when
2495 11. Now that a reference to $sender_host_address automatically causes a reverse
2496 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2497 host lookup before query-style lookups in lists that might use this
2498 variable. This has therefore been abolished, and the "net-" prefix is no
2499 longer necessary for query-style lookups.
2501 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2502 have been a typo for LFLAGS, so it has been changed.
2504 13. The install script calls Exim with "-C /dev/null" in order to find the
2505 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2506 to be output. Howeve, since Exim outputs its version number before the
2507 error, it didn't break the script. It just looked ugly. I fixed this by
2508 always allowing "-C /dev/null" if the caller is root.
2510 14. Ignore overlarge ACL variable number when reading spool file - insurance
2511 against a later release with more variables having written the file.
2513 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2514 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2515 this, as well as the form without the "IPv6" on the front.
2517 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2518 OS/Makefile-Darwin file.
2520 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2521 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2523 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2524 variable. However, some OS use ints for inodes. I've added cast to long int
2525 to get rid of the compiler warning.
2527 19. I had forgotten to lock out "/../" in configuration file names when
2528 ALT_CONFIG_PREFIX was set.
2530 20. Routers used for verification do not need to specify transports. However,
2531 if such a router generated a host list, and callout was configured, Exim
2532 crashed, because it could not find a port number from the (non-existent)
2533 transport. It now assumes port 25 in this circumstance.
2535 21. Added the -t option to exigrep.
2537 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2538 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2539 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2540 them is set, LOOKUP_LSEARCH is forced.
2542 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2544 24. Added sender and host information to the "rejected by local_scan()" log
2545 line; previously there was no indication of these.
2547 25. Added .include_if_exists.
2549 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2550 Linux. It turns out that not all file systems support this. Apparently some
2551 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2552 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2553 not supported on the file descriptor, is now ignored when Exim is trying to
2554 sync a directory. This applies only to Linux.
2556 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2558 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2559 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2562 29. Added support for maildirsize files from supplied patch (modified a bit).
2564 30. The use of :fail: followed by an empty string could lead Exim to respond to
2565 sender verification failures with (e.g.):
2567 550 Verification failed for <xxx>
2568 550 Sender verify failed
2570 where the first response line was missing the '-' that indicates it is not
2571 the final line of the response.
2573 31. The loop for finding the name of the user that called Exim had a hardwired
2574 limit of 10; it now uses the value of finduser_retries, which is used for
2575 all other user lookups.
2577 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2580 33. Exim was neglecting to zero errno before one call of strtol() when
2581 expanding a string and expecting an integer value. On some systems this
2582 resulted in spurious "integer overflow" errors. Also, it was casting the
2583 result into an int without checking.
2585 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2586 did not work. The code looks as if it has *never* worked, though it appears
2587 to have been documented since at least releast 1.62. I have made it work.
2589 35. The "timeout_DNS" error in retry rules, also documented since at least
2590 1.62, also never worked. As it isn't clear exactly what this means, and
2591 clearly it isn't a major issue, I have abolished the feature by treating it
2592 as "timeout", and writing a warning to the main and panic logs.
2594 36. The display of retry rules for -brt wasn't always showing the error code
2597 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2598 timeout_connect_A, timeout_connect_MX.
2600 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2601 to the empty sender.
2603 39. The daemon was not analysing the content of -oX till after it had closed
2604 stderr and disconnected from the controlling terminal. This meant that any
2605 syntax errors were only noted on the panic log, and the return code from
2606 the command was 0. By re-arranging the code a little, I've made the
2607 decoding happen first, so such errors now appear on stderr, and the return
2608 code is 1. However, the actual setting up of the sockets still happens in
2609 the disconnected process, so errors there are still only recorded on the
2612 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2613 connections (as happens on some IP stacks) was logged at start up time as
2614 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2615 it from "IPv6 and IPv4", which means that two separate sockets are being
2618 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2619 says whether AF_INET or AF_INET6 was passed as an argument.
2621 42. Exiwhat output was messed up when time zones were included in log
2624 43. Exiwhat now gives more information about the daemon's listening ports,
2625 and whether -tls-on-connect was used.
2627 44. The "port" option of the smtp transport is now expanded.
2629 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2630 silently ignored. Now an error message is written to the main and panic
2633 46. There's a new ACL modifier called "logwrite" which writes to a log file
2634 as soon as it is encountered.
2636 47. Added $local_user_uid and $local_user_gid at routing time.
2638 48. Exim crashed when trying to verify a sender address that was being
2641 49. Exim was recognizing only a space character after ".include". It now also
2642 recognizes a tab character.
2644 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2645 extracting the relevant information from the specification. The man page no
2646 longer contains scrambled data for the -d option, and I've added a section
2647 at the front about calling Exim under different names.
2649 51. Added "extra_headers" argument to the "mail" command in filter files.
2651 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2654 53. Installed eximstats 1.29.
2656 54. Added transport_filter_timeout as a generic transport option.
2658 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2659 Cc: header lines. This was required by RFC 822, but it not required by RFC
2662 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2663 incoming messages that did not have them. Now it does so only if the
2664 message originates locally, that is, if there is no associated remote host
2665 address. When Resent- header lines are present, this applies to the Resent-
2666 lines rather than the non-Resent- lines.
2668 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2669 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2671 58. Messages for configuration errors now include the name of the main
2672 configuration file - useful now that there may be more than one file in a
2673 list (.included file names were always shown).
2675 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2676 for those rare installations that do not start the daemon as root or run it
2677 setuid root. I've cut out the call to initgroups() if the daemon is not
2680 60. The Exim user and group can now be bound into the binary as text strings
2681 that are looked up at the start of Exim's processing.
2683 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2685 62. Added $mailstore_basename variable.
2687 63. Installed patch to sieve.c from Michael Haardt.
2689 64. When Exim failed to open the panic log after failing to open the main log,
2690 the original message it was trying to log was written to stderr and debug
2691 output, but if they were not available (the usual case in production), it
2692 was lost. Now it is written to syslog before the two lines that record the
2693 failures to open the logs.
2695 65. Users' Exim filters run in subprocesses under the user's uid. It is
2696 possible for a "deliver" command or an alias in a "personal" command to
2697 provoke an address rewrite. If logging of address rewriting is configured,
2698 this fails because the process is not running as root or exim. There may be
2699 a better way of dealing with this, but for the moment (because 4.30 needs
2700 to be released), I have disabled address rewrite logging when running a
2701 filter in a non-root, non-exim process.
2707 1. The buildconfig auxiliary program wasn't quoting the value set for
2708 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2709 not defined. This bug was masked in 4.22 by the effect that was fixed in
2712 2. Some messages that were rejected after a message id was allocated were
2713 shown as "incomplete" by exigrep. It no longer does this for messages that
2714 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2716 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2717 have allow_domain_literals set, the ID did not get logged in the <= line.
2718 Domain literals are now always recognized in Message-ID: header lines.
2720 4. The first argument for a ${extract expansion item is the key name or field
2721 number. Leading and trailing spaces in this item were not being ignored,
2722 causing some misleading effects.
2724 5. When deliver_drop_privilege was set, single queue runner processes started
2725 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2726 same command in the process it spins off) were not dropping privilege.
2728 6. When the daemon running as "exim" started a queue runner, it always
2729 re-executed Exim in the spun-off process. This is a waste of effort when
2730 deliver_drop_privilege is set. The new process now just calls the
2731 queue-runner function directly.
2737 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2740 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2741 ignored. Though the use of -oP was forcing the writing of a pid file, it
2742 was always written to the default place.
2744 3. If the message "no IP address found for host xxxx" is generated during
2745 incoming verification, it is now followed by identification of the incoming
2746 connection (so you can more easily find what provoked it).
2748 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2750 5. Added some features to "harden" Exim a bit more against certain attacks:
2752 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2753 be put in Local/Makefile. This is like the never_users runtime option,
2754 but it cannot be overridden. The default setting is "root".
2756 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2757 prefix string with which any file named in a -C command line option
2760 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2761 is retained for -C and -D only if the caller of Exim is root. Without
2762 it, the exim user may also use -C and -D and retain privilege.
2764 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2765 command line option is disabled.
2767 6. Macro names set by the -D option must start with an upper case letter, just
2768 like macro names defined in the configuration file.
2770 7. Added "dereference=" facility to LDAP.
2772 8. Two instances of the typo "uknown" in the source files are fixed.
2774 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2775 the Configure-Makefile script screwed up while processing it.
2777 10. Incorporated PCRE 4.4.
2779 11. The SMTP synchronization check was not operating right at the start of an
2780 SMTP session. For example, it could not catch a HELO sent before the client
2781 waited for the greeting. There is now a check for outstanding input at the
2782 point when the greeting is written. Because of the duplex, asynchronous
2783 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2784 way, but not yet received, when the check is performed.
2786 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2787 on TCP/IP sockets, because this apparently causes some broken clients to
2790 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2791 unchanged) from the Cygwin maintainer.
2793 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2794 was supported instead of testing for mbx. Effectively a typo.
2796 15. The spa authenticator server code was not checking that the input it
2797 received was valid base64.
2799 16. The debug output line for the "set" modifier in ACLs was not showing the
2800 name of the variable that was being set.
2802 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2804 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2805 lookup on its own. Something else was needed to trigger the lookup. For
2806 example, a match in host_lookup or the need for a host name in a host list.
2807 Now, if $sender_host_name is referenced and the host name has not yet been
2808 looked up, a lookup is performed. If the lookup fails, the variable remains
2809 empty, and $host_lookup_failed is set to "1".
2811 19. Added "eqi" as a case-independent comparison operator.
2813 20. The saslauthd authentication condition could segfault if neither service
2814 nor realm was specified.
2816 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2817 error message that was logged was misleading, and incoming SMTP
2818 connections were dropped. The message is now more accurate, and temporary
2819 errors are given to SMTP connections.
2821 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2822 (except RSET) with a 421 error, until QUIT is received. However, it was
2823 failing to send a response to QUIT.
2825 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2826 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2827 ACL is now run after the helo_try_verify_hosts code.
2829 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2830 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2831 case-independent, so other case variants are also recognized). Apparently
2832 some systems use these upper case variants.
2834 25. If more than two messages were waiting for the same host, and a transport
2835 filter was specified for the transport, Exim sent two messages over the
2836 same TCP/IP connection, and then failed with "socket operation on non-
2837 socket" when it tried to send the third.
2839 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2841 27. The extern definition of crypt16() in expand.c was not being excluded when
2842 the OS had its own crypt16() function.
2844 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2845 as a preferred synonym for return_size_limit, both as an option and as an
2848 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2850 30. Changed the default configuration ACL to relax the local part checking rule
2851 for addresses that are not in any local domains. For these addresses,
2852 slashes and pipe symbols are allowed within local parts, but the sequence
2853 /../ is explicitly forbidden.
2855 31. SPA server authentication was not clearing the challenge buffer before
2858 32. log_message in a "warn" ACL statement was writing to the reject log as
2859 well as to the main log, which contradicts the documentation and doesn't
2860 seem right (because no rejection is happening). So I have stopped it.
2862 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2863 However, I am unable to do any testing of this.
2865 34. Fixed an infelicity in the appendfile transport. When checking directories
2866 for a mailbox, to see if any needed to be created, it was accidentally
2867 using path names with one or more superfluous leading slashes; tracing
2868 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2870 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2871 contents are added to the log line that is written for every discarded
2872 recipient. (Previously a log_message setting was ignored.)
2874 36. The ${quote: operator now quotes the string if it is empty.
2876 37. The install script runs exim in order to find its version number. If for
2877 some reason other than non-existence or emptiness, which it checks, it
2878 could not run './exim', it was installing it with an empty version number,
2879 i.e. as "exim-". This error state is now caught, and the installation is
2882 38. An argument was missing from the function that creates an error message
2883 when Exim fails to connect to the socket for saslauthd authentication.
2884 This could cause Exim to crash, or give a corrupted message.
2886 39. Added isip, isip4, and isip6 to ${if conditions.
2888 40. The ACL variables $acl_xx are now saved with the message, and can be
2889 accessed later in routers, transports, and filters.
2891 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2892 strings in the file are not string-expanded.
2894 42. If a MAIL command specified a SIZE value that was too large to fit into an
2895 int variable, the check against message_size_limit failed. Such values are
2896 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2897 day this will have to be increased, but I don't think I want to be around
2898 when emails are that large.
2905 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2906 iconv() is not standard in FreeBSD.
2908 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2909 IPv6 enabled. The observed symptom was a segmentation fault on return from
2910 the function os_common_find_running_interfaces() in src/os.c.
2912 3. In the check_special_case() function in daemon.c I had used "errno" as an
2913 argument name, which causes warnings on some systems. This was basically a
2914 typo, since it was named "eno" in the comments!
2916 4. The code that waits for the clock to tick (at a resolution of some fraction
2917 of a second) so as to ensure message-id uniqueness was always waiting for
2918 at least one whole tick, when it could have waited for less. [This is
2919 almost certainly not relevant at current processor speeds, where it is
2920 unlikely to ever wait at all. But we try to future-proof.]
2922 5. The function that sleeps for a time interval that includes fractions of a
2923 second contained a race. It did not block SIGALRM between setting the
2924 timer, and suspending (a couple of lines later). If the interval was short
2925 and the sigsuspend() was delayed until after it had expired, the suspension
2926 never ended. On busy systems this could lead to processes getting stuck for
2929 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2930 process, before it forks any delivery processes. The open lookup caching
2931 mechanism meant that the open file or database connection was passed into
2932 the delivery process. The problem was that delivery processes always tidy
2933 up cached lookup data. This could cause a problem for the next delivery
2934 process started by the queue runner, because the external queue runner
2935 process does not know about the closure. So the next delivery process
2936 still has data in the lookup cache. In the case of a file lookup, there was
2937 no problem because closing a file descriptor in a subprocess doesn't affect
2938 the parent. However, if the lookup was caching a connection to a database,
2939 the connection was closed, and the second delivery process was likely to
2940 see errors such as "PGSQL: query failed: server closed the connection
2941 unexpectedly". The problem has been fixed by closing all cached lookups
2942 in a queue runner before running a delivery process.
2944 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2945 seem to have the "const" qualifier which it has on other OS. I've
2948 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2949 *of the same type* (client or server) with the same public name that an
2950 error should be diagnosed.
2952 9. When Exim looked up a host name for an IP address, but failed to find the
2953 original IP address when looking up the host name (a safety check), it
2954 output the message "<ip address> does not match any IP for NULL", which was
2955 confusing, to say the least. The bug was that the host name should have
2956 appeared instead of "NULL".
2958 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
2959 user that is built into the binary, and the -C or -D options is used, root
2960 privilege is dropped before the configuration file is read. In addition,
2961 logging is switched to stderr instead of the normal log files. If the
2962 configuration then re-defines the Exim user, the unprivileged environment
2963 is probably not what is expected, so Exim logs a panic warning message (but
2966 However, if deliver_drop_privilege is set, the unprivileged state may well
2967 be exactly what is intended, so the warning has been cut out in that case,
2968 and Exim is allowed to try to write to its normal log files.
2974 1. smtp_return_error_details was not giving details for temporary sender
2975 or receiver verification errors.
2977 2. Diagnose a configuration error if two authenticators have the same public
2980 3. Exim used not to create the message log file for a message until the first
2981 delivery attempt. This could be confusing when incoming messages were held
2982 for policy or load reasons. The message log file is now created at the time
2983 the message is received, and an initial "Received" line is written to it.
2985 4. The automatically generated man page for command line options had a minor
2986 bug that caused no ill effects; however, a more serious problem was that
2987 the procedure for building the man page automatically didn't always
2988 operate. Consequently, release 4.20 contains an out-of-date version. This
2989 shouldn't happen again.
2991 5. When building Exim with embedded Perl support, the script that builds the
2992 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2993 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2995 6. The freeze_tell option was not being used for messages that were frozen on
2996 arrival, either by an ACL or by local_scan().
2998 7. Added the smtp_incomplete_transaction log selector.
3000 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3001 was accepting AUTH without a new EHLO.
3003 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3004 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3007 10. Logging of TCP/IP connections (when configured) now happens in the main
3008 daemon process instead of the child process, so that the TCP/IP connection
3009 count is more accurate (but it can never be perfect).
3011 11. The use of "drop" in a nested ACL was not being handled correctly in the
3012 outer ACL. Now, if condition failure induced by the nested "drop" causes
3013 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3014 or "require"), the connection is dropped.
3016 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3017 that yield "discard" can now be used with an "accept" or a "discard" verb,
3018 but an error is generated for any others (because I can't see a useful way
3019 to define what should happen).
3021 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3022 are now processed in the same way as lines in the Exim configuration file.
3023 In particular, continuation lines are supported.
3025 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3027 15. Added -ti meaning -t -i.
3029 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3030 domains, and warn by logging if others are found.
3032 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3033 returned from GIFCONF when Exim is trying to find the list of interfaces on
3034 a host. The code in os.c has been modified to copy each ifreq to an aligned
3035 structure in all cases.
3037 Also, in some cases, the returned ifreq's were being copied to a 'struct
3038 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3039 means the last couple of bytes of an IPv6 address could be chopped if the
3040 ifreq contained only a normal sockaddr (14 bytes storage).
3042 18. Named domain lists were not supported in the hosts_treat_as_local option.
3043 An entry such as +xxxx was not recognized, and was treated as a literal
3046 19. Ensure that header lines added by a DATA ACL are included in the reject log
3047 if the ACL subsequently rejects the message.
3049 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3050 MD5 (which is deprecated).
3052 21. When testing a filter file using -bf, Exim was writing a message when it
3053 took the sender from a "From " line in the message, but it was not doing so
3054 when it took $return_path from a Return-Path: header line. It now does.
3056 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3057 with a valid header line field name (a series of printing characters
3058 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3060 23. Changed "disc" in the source to "disk" to conform to the documentation and
3061 the book and for uniformity.
3063 24. Ignore Sendmail's -Ooption=value command line item.
3065 25. When execve() failed while trying to run a command in a pipe transport,
3066 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3067 could be confused with a return value of 69 from the command itself. This
3068 has been changed to 127, the value the shell returns if it is asked to run
3069 a non-existent command. The wording for the related log line suggests a
3070 non-existent command as the problem.
3072 26. If received_header_text expands to an empty string, do not add a Received:
3073 header line to the message. (Well, it adds a token one on the spool, but
3074 marks it "old" so that it doesn't get used or transmitted.)
3076 27. Installed eximstats 1.28 (addition of -nt option).
3078 28. There was no check for failure on the call to getsockname() in the daemon
3079 code. This can fail if there is a shortage of resources on the system, with
3080 ENOMEM, for example. A temporary error is now given on failure.
3082 29. Contrary to the C standard, it seems that in some environments, the
3083 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3084 program. Exim now does this explicitly; it affects the formatting of
3085 timestamps using strftime().
3087 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3088 complaints. I've now initialized all the variables, to avoid this.
3090 32. Header lines added by a system filter were not being "seen" during
3091 transport-time rewrites.
3093 33. The info_callback() function passed to OpenSSL is set up with type void
3094 (*)(SSL *, int, int), as described somewhere. However, when calling the
3095 function (actually a macro) that sets it up, the type void(*)() is
3096 expected. I've put in a cast to prevent warnings from picky compilers.
3098 34. If a DNS black list lookup found a CNAME record, but there were no A
3099 records associated with the domain it pointed at, Exim crashed.
3101 35. If a DNS black list lookup returned more than one A record, Exim ignored
3102 all but the first. It now scans all returned addresses if a particular IP
3103 value is being sought. In this situation, the contents of the
3104 $dnslist_value variable are a list of all the addresses, separated by a
3107 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3108 to accept a host name and all its aliases if the forward lookup for any of
3109 them yielded the IP address of the incoming connection. Now it accepts only
3110 those names whose forward lookup yields the correct IP address. Any other
3111 names are discarded. This closes a loophole whereby a rogue DNS
3112 administrator could create reverse DNS records to break through a
3113 wildcarded host restriction in an ACL.
3115 37. If a user filter or a system filter that ran in a subprocess used any of
3116 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3117 the wrong values were passed to the pipe command ($thisaddress had the
3118 value of $0, $0 had the value of $1, etc). This bug was introduced by
3119 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3121 38. Improved the line breaking for long SMTP error messages from ACLs.
3122 Previously, if there was no break point between 40 and 75 characters, Exim
3123 left the rest of the message alone. Two changes have been made: (a) I've
3124 reduced the minimum length to 35 characters; (b) if it can't find a break
3125 point between 35 and 75 characters, it looks ahead and uses the first one
3126 that it finds. This may give the occasional overlong line, but at least the
3127 remaining text gets split now.
3129 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3130 file descriptors might be low, and that setting 1000 would always raise it.
3131 It turns out that in some environments, the limit is already over 1000 and
3132 that lowering it causes trouble. So now Exim takes care not to decrease it.
3134 40. When delivering a message, the value of $return_path is set to $sender_
3135 address at the start of routing (routers may change the value). By an
3136 oversight, this default was not being set up when an address was tested by
3137 -bt or -bv, which affected the outcome if any router or filter referred to
3140 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3141 log only when "message" or "log_message" are set. However, if one of the
3142 conditions was an address verification, or a call to a nested ACL, the
3143 messages generated by the underlying test were being passed through. This
3144 no longer happens. The underlying message is available in $acl_verify_
3145 message for both "message" and "log_message" expansions, so it can be
3146 passed through if needed.
3148 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3149 new expansion $bh_ to give the encoded byte string without charset
3150 translation. Translation happens only if iconv() is available; HAVE_ICONV
3151 indicates this at build time. HEADERS_CHARSET gives the charset to
3152 translate to; headers_charset can change it in the configuration, and
3153 "headers charset" can change it in an individual filter file.
3155 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3156 that creates RFC 2047 encoded "words" labels them as that charset instead
3157 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3158 expansion operator; (ii) when Exim creates a From: line for a local
3159 message; (iii) when a header line is rewritten to include a "phrase" part.
3161 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3162 buggy, causing it to skip the first lines of messages whose message ID
3163 ended in 'D'. This would not have bitten before Exim release 4.14, because
3164 message IDs were unlikely to end in 'D' before then. The effect was to have
3165 incorrect size information for certain domains.
3167 45. #include "config.h" was missing at the start of the crypt16.c module. This
3168 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3171 46. If there was a timeout during a "random" callout check, Exim treated it as
3172 a failure of the random address, and carried on sending RSET and the real
3173 address. If the delay was just some slowness somewhere, the response to the
3174 original RCPT would be taken as a response to RSET and so on, causing
3175 mayhem of various kinds.
3177 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3178 when I implemented it. It didn't allow for the fact that some option values
3179 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3180 the right test for positive values.
3182 48. Domain names in DNS records are case-independent. Exim always looks them up
3183 in lower case. Some resolvers return domain names in exactly the case they
3184 appear in the zone file, that is, they may contain uppercase letters. Not
3185 all resolvers do this - some return always lower case. Exim was treating a
3186 change of case by a resolver as a change of domain, similar to a widening
3187 of a domain abbreviation. This triggered its re-routing code and so it was
3188 trying to route what was effectively the same domain again. This normally
3189 caused routing to fail (because the router wouldn't handle the domain
3190 twice). Now Exim checks for this case specially, and just changes the
3191 casing of the domain that it ultimately uses when it transmits the message
3194 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3197 50. If a filter generated a file delivery with a non-absolute name (possible if
3198 no home directory exists for the router), the forbid_file option was not
3201 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3202 the existing equality matching.
3204 52. Exim was using ints instead of ino_t variables in some places where it was
3205 dealing with inode numbers.
3207 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3208 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3209 called TMPDIR, and if it finds it is different, it changes its value.
3211 54. The smtp_printf() function is now made available to local_scan() so
3212 additional output lines can be written before returning. There is also an
3213 smtp_fflush() function to enable the detection of a dropped connection.
3214 The variables smtp_input and smtp_batched_input are exported to
3217 55. Changed the default runtime configuration: the message "Unknown user"
3218 has been removed from the ACL, and instead placed on the localuser router,
3219 using the cannot_route_message feature. This means that any verification
3220 failures that generate their own messages won't get overridden. Similarly,
3221 the "Unrouteable address" message that was in the ACL for unverifiable
3222 relay addresses has also been removed.
3224 56. Added hosts_avoid_esmtp to the smtp transport.
3226 57. The exicyclog script was not checking for the esoteric option
3227 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3228 will work only if exicyclog is run under the appropriate euid.
3230 58. Following a discussion on the list, the rules by which Exim recognises line
3231 endings on incoming messages have been changed. The -dropcr and drop_cr
3232 options are now no-ops, retained only for backwards compatibility. The
3233 following line terminators are recognized: LF CRLF CR. However, special
3234 processing applies to CR:
3236 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3237 nor a local message in the state where . is a terminator.
3239 (ii) If a bare CR is encountered in a header line, an extra space is added
3240 after the line terminator so as not to end the header. The reasoning
3241 behind this is that bare CRs in header lines are most likely either
3242 to be mistakes, or people trying to play silly games.
3244 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3245 was being incorrectly given as 18 bytes larger than it should have been.
3246 This is a VOB (very old bug).
3248 60. This may never have affected anything current, but just in case it has:
3249 When the local host is found other than at the start of a list of hosts,
3250 the local host, those with the same MX, and any that follow, are discarded.
3251 When the list in question was part of a longer list of hosts, the following
3252 hosts (not currently being processed) were also being discarded. This no
3253 longer happens. I'm not sure if this situation could ever has previously
3256 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3259 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3260 header. This is something that is recommended in a new Internet Draft, and
3261 is something that is documented as being done by Sendmail. There are two
3262 possible values. For messages generated by the autoreply transport, Exim
3265 Auto-Submitted: auto-replied
3267 whereas for all other generated messages (e.g. bounces) it adds
3269 Auto-Submitted: auto-generated
3271 63. The "personal" condition in filters now includes a test for the
3272 Auto-Submitted: header. If it contains the string "auto-" the message it
3273 not considered personal.
3275 64. Added rcpt_include_affixes as a generic transport option.
3277 65. Added queue_only_override (default true).
3279 66. Added the syslog_duplication option.
3281 67. If what should have been the first header line of a message consisted of
3282 a space followed by a colon, Exim was mis-interpreting it as a header line.
3283 It isn't of course - it is syntactically invalid and should therefore be
3284 treated as the start of the message body. The misbehaviour could have
3285 caused a number of strange effects, including loss of data in subsequent
3286 header lines, and spool format errors.
3288 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3289 client host had authenticated. This control can now be exercised by an ACL
3290 for more flexibility.
3292 69. By default, callouts do not happen when testing with -bh. There is now a
3293 variant, -bhc, which does actually run the callout code, including
3294 consulting and updating the callout cache.
3296 70. Added support for saslauthd authentication, courtesy of Alexander
3299 71. If statvfs() failed on the spool or log directories while checking their
3300 size for availability, Exim confusingly gave the error "space shortage".
3301 Furthermore, in debugging mode it crashed with a floating point exception.
3302 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3303 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3304 serious problem, Exim now writes to the main and panic logs when this
3305 happens, with details of the failure. It then refuses to accept the
3306 incoming message, giving the message "spool directory problem" or "log
3307 directory problem" with a 421 code for SMTP messages.
3309 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3310 0, 1, and 2 exist, because some OS complain for execs without them (see
3311 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3312 descriptors. However, the code omitted to check that the open succeeded,
3313 causing mysterious errors if for some reason the permissions on /dev/null
3314 got screwed. Now Exim writes a message to the main and panic logs, and
3315 bombs out if it can't open /dev/null.
3317 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3318 interact so that it is all more flexible. It is supposed to remain
3319 backwards compatible. Also added extra_local_interfaces.
3321 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3322 to bomb out with an assertion failure - to the client this appears as a
3323 connection drop. This problem occurs in the part of the code that was taken
3324 from the Samba project. Fortunately, the assertion is in a very simple
3325 function, so I have fixed this by reproducing the function inline in the
3326 one place where it is called, and arranging for authentication to fail
3327 instead of killing the process with assert().
3329 75. The SPA client code was not working when the server requested OEM rather
3330 than Unicode encoding.
3332 76. Added code to make require_files with a specific uid setting more usable in
3333 the case where statting the file as root fails - usually a non-root-mounted
3334 NFS file system. When this happens and the failure is EACCES, Exim now
3335 forks a subprocess and does the per-uid checking as the relevant uid.
3337 77. Added process_log_path.
3339 78. If log_file_path was not explicitly set, a setting of check_log_space or
3340 check_log_inodes was ignored.
3342 79. If a space check for the spool or log partitions fails, the incident is now
3343 logged. Of course, in the latter case the data may get lost...
3345 80. Added the %p formatting code to string_format() so that it can be used to
3346 print addresses in debug_print(). Adjusted all the address printing in the
3347 debugging in store.c to use %p rather than %d.
3349 81. There was a concern that a line of code in smtp_in.c could overflow a
3350 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3351 initially expressed, the concern was not well-founded, because trailing
3352 spaces are removed early. However, if the trailing spaces were followed by
3353 a NULL, they did not get removed, so the overflow was possible. Two fixes
3356 (a) I re-wrote the offending code in a cleaner fashion.
3357 (b) If an incoming SMTP command contains a NULL character, it is rejected
3360 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3361 runs initgroups(), so that if the Exim user is in any additional groups,
3362 they will be used during message reception.
3368 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob