1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.223 2005/09/12 14:03:42 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.
177 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
179 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
180 command itself ended in error, the underlying message about the transport
181 filter timeout was being overwritten with the pipe command error. Now the
182 underlying error message should be appended to the second error message.
184 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
186 PH/02 Reduce the amount of output that "make" produces by default. Full output
187 can still be requested.
189 PH/03 The warning log line about a condition test deferring for a "warn" verb
190 was being output only once per connection, rather than after each
191 occurrence (because it was using the same function as for successful
192 "warn" verbs). This seems wrong, so I have changed it.
194 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
195 it should not have, which might have caused a crash in the right
196 circumstances, but probably never did.
198 PH/04 Installed a modified version of Tony Finch's patch to make submission
199 mode fix the return path as well as the Sender: header line, and to
200 add a /name= option so that you can make the user's friendly name appear
203 TF/03 Added the control = fakedefer ACL modifier.
205 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
206 Mark Lowes for thorough testing.
208 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
210 TK/03 Merged latest SRS patch from Miles Wilton.
212 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
213 with the definition in sysexits.h (which is #included earlier).
214 Fortunately, Exim does not actually use EX_OK. The code used to try to
215 preserve the sysexits.h value, by assumimg that macro definitions were
216 scanned for macro replacements. I have been disabused of this notion,
217 so now the code just undefines EX_OK before #including unistd.h.
219 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
220 in the smtp transport. When a block could not be written in a single
221 write() function, the timeout was being re-applied to each part-write.
222 This seems wrong - if the receiver was accepting one byte at a time it
223 would take for ever. The timeout is now adjusted when this happens. It
224 doesn't have to be particularly precise.
226 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
227 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
229 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
230 without a domain if the check to <postmaster@domain> fails.
232 SC/01 Eximstats: added -xls and the ability to specify output files
233 (patch written by Frank Heydlauf).
235 SC/02 Eximstats: use FileHandles for outputing results.
237 SC/03 Eximstats: allow any combination of xls, txt, and html output.
239 SC/04 Eximstats: fixed display of large numbers with -nvr option
241 SC/05 Eximstats: fixed merging of reports with empty tables.
243 SC/06 Eximstats: added the -include_original_destination flag
245 SC/07 Eximstats: removed tabs and trailing whitespace.
247 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
249 TK/06 MBOX spool code: Add real "From " MBOX separator line
250 so the .eml file is really in mbox format (even though
251 most programs do not really care). Patch from Alex Miller.
253 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
254 The latter is generated from $received_to and is only set if the
255 message has one envelope recipient. SA can use these headers,
256 obviously out-of-the-box. Patch from Alex Miller.
258 PH/08 The ${def test on a variable was returning false if the variable's
259 value was "0", contrary to what the specification has always said!
260 The result should be true unless the variable is empty.
262 PH/09 The syntax error of a character other than { following "${if
263 def:variable_name" (after optional whitespace) was not being diagnosed.
264 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
265 accidental colon was present, for example, could give incorrect results.
267 PH/10 Tidied the code in a number of places where the st_size field of a stat()
268 result is used (not including appendfile, where other changes are about
271 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
272 This involved changing a lot of size variables from int to off_t. It
273 should work with maildirs and everything.
275 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
276 spamd dying while we are connected to it.
278 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
281 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
282 function for BDB 4.3.
284 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
286 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
287 the sources for PCRE have been re-arranged and more files are now
290 PH/15 The code I had for printing potentially long long variables in PH/11
291 above was not the best (it lost precision). The length of off_t variables
292 is now inspected at build time, and an appropriate printing format (%ld
293 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
294 to be "long long int" or "long int". This is needed for the internal
295 formatting function string_vformat().
297 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
298 the configuration file to be ":syslog", then the script "guesses" where
299 the logs files are, rather than using the compiled in default. In our
300 case the guess is not the same as the compiled default, so the script
301 suddenly stopped working when I started to use syslog. The patch checks
302 to see if log_file_path is "". If so, it attempts to read it from exim
303 with no configuration file to get the compiled in version, before it
304 falls back to the previous guessing code."
306 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
307 implementing BATV in an Exim configuration. See NewStuff for the gory
310 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
311 Makefile that are specific to HP-UX.
313 PH/18 If the "use_postmaster" option was set for a recipient callout together
314 with the "random" option, the postmaster address was used as the MAIL
315 FROM address for the random test, but not for the subsequent recipient
316 test. It is now used for both.
318 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
319 patch removes a few documentation additions to RFC 3028, because the
320 latest draft now contains them. It adds the new en;ascii-case comparator
321 and a new error check for 8bit text in MIME parts. Comparator and
322 require names are now matched exactly. I enabled the subaddress
323 extension, but it is not well tested yet (read: it works for me)."
325 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
326 rework some of the code of TK/09 above to avoid the hardwired use of
327 "%lld" and "long long". Replaced the call to snprintf() with a call to
330 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
331 records point to non-existent hosts", "retry timeout exceeded", and
332 "retry time not reached for any host after a long failure period".
334 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
335 experimental DomainKeys support:
337 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
338 (2) On an error such as an illegally used "control", the wrong name for
339 the control was given.
341 These problems did NOT occur unless DomainKeys support was compiled.
343 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
345 PH/24 Added ${if match_ip condition.
347 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
348 databases so that it will be absolutely obvious if a crash occurs in the
349 DB library. This is a regular occurrence (often caused by mis-matched
352 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
353 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
354 picked up on a user's system that detects such things. There doesn't seem
355 to be a gcc warning option for this - only an attribute that has to be
356 put on the function's prototype. It seems that in Fedora Core 4 they have
357 set this on a number of new functions. No doubt there will be more in due
360 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
361 specify a transport. However, if an address that was verified by such a
362 router was the subject of a callout, Exim crashed because it tried to
363 read the rcpt_include_affixes from the non-existent transport. Now it
364 just assumes that the setting of that option is false. This bug was
365 introduced by 4.51/PH/31.
367 PH/28 Changed -d+all to exclude +memory, because that information is very
368 rarely of interest, but it makes the output a lot bigger. People tend to
369 do -d+all out of habit.
371 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
372 code in os-type was giving problems when libc.so lives in lib64, like on
375 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
376 aren't the modern standard, and it seems that some systems' include files
377 don't always have them. Exim was already checking for some of the newer
378 ones like T_AAAA, and defining it itself. I've added checks for all the
379 record types that Exim uses.
381 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
382 not automatically generating a new one, as it is supposed to. This
383 prevented TLS from working. If the file did exist, but contained invalid
384 data, a new version was generated, as expected. It was only the case of a
385 non-existent file that was broken.
387 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
388 with a change in libdomainkeys > 0.64.
390 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
391 from DNS. If the selector record carries the flag, it now has
392 precedence over the domain-wide flag.
394 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
396 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
397 the use of a port name that isn't defined in /etc/services) occurred, the
398 message was deferred as in a normal delivery, and thus remained on the
399 spool, instead of being failed because of the mua_wrapper setting. This
400 is now fixed, and I tidied up some of the mua_wrapper messages at the
403 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
404 the messages in a hash of arrays rather than using individual hashes.
405 This is a bit cleaner and results in dramatic memory savings, albeit
406 at a slight CPU cost.
408 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
409 as requested by Marc Sherman.
411 SC/10 Eximstats: added histograms for user specified patterns as requested
414 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
416 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
417 fopen() in the content-scanning modules that did not already have it.
423 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
424 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
426 TK/02 Fix ACL "control" statement not being available in MIME ACL.
428 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
430 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
431 to test Sieve filters that use "vacation".
433 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
434 that changes the way the GnuTLS parameters are stored in the cache file.
435 The new format can be generated externally. For backward compatibility,
436 if the data in the cache doesn't make sense, Exim assumes it has read an
437 old-format file, and it generates new data and writes a new file. This
438 means that you can't go back to an older release without removing the
441 PH/03 A redirect router that has both "unseen" and "one_time" set does not
442 work if there are any delivery delays because "one_time" forces the
443 parent to be marked "delivered", so its unseen clone is never tried
444 again. For this reason, Exim now forbids the simultaneous setting of
447 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
448 redirected to themselves ("homonym" addresses). Read the long ChangeLog
449 entry if you want to know the details. The fix, however, neglected to
450 consider the case when local delivery batching is involved. The test for
451 "previously delivered" was not happening when checking to see if an
452 address could be batched with a previous (undelivered) one; under
453 certain circumstances this could lead to multiple deliveries to the same
456 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
457 in its include files, and this causes problems building Exim.
459 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
460 header_syntax) but Exim was just ignoring anything given after a slash.
461 In particular, this caused confusion with an attempt to use "verify =
462 reverse_host_lookup/defer_ok". An error is now given when options are
463 supplied for verify items that do not have them. (Maybe reverse_host_
464 lookup should have a defer_ok option, but that's a different point.)
466 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
467 defined by RFC 821) to 2048, because there were problems with some AUTH
468 commands, and RFC 1869 says the size should be increased for extended
469 SMTP commands that take arguments.
471 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
474 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
475 "unknown" error; now it says that the functionality isn't in the binary.
477 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
478 an address' error message when a string expansion fails (syntax or
479 whatever). Otherwise the password may appear in the log. Following change
480 PH/42 below, there is no longer a chance of it appearing in a bounce
483 PH/11 Installed exipick version 20050225.0 from John Jetmore.
485 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
486 of its addresses was ever tried. (Bugzilla bug #2.)
488 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
489 the result incorrectly in the debug output. (It correctly added a newline
490 to what was transported.)
492 TF/01 Added $received_time.
494 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
495 commented out examples of how to interface to a virus scanner and to
496 SpamAssassin. Also added commented examples of av_scanner and
497 spamd_address settings.
499 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
500 and controls are allowed in which ACLs. There were a couple of minor
501 errors. Some of the entries in the conditions table (which is a table of
502 where they are NOT allowed) were getting very unwieldy; rewrote them as a
503 negation of where the condition IS allowed.
505 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
507 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
508 header file does not have a version number, so I've had to invent a new
509 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
510 API. The code is untested by me (my Linux distribution still has 0.3.2 of
511 radiusclient), but it was contributed by a Radius user.
513 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
514 files or directories, for OpenSSL.
516 PH/19 When an Exim process that is running as root has to create an Exim log
517 file, it does so in a subprocess that runs as exim:exim so as to get the
518 ownership right at creation (otherwise, other Exim processes might see
519 the file with the wrong ownership). There was no test for failure of this
520 fork() call, which would lead to the process getting stuck as it waited
521 for a non-existent subprocess. Forks do occasionally fail when resources
522 run out. I reviewed all the other calls to fork(); they all seem to check
525 PH/20 When checking for unexpected SMTP input at connect time (before writing
526 the banner), Exim was not dealing correctly with a non-positive return
527 from the read() function. If the client had disconnected by this time,
528 the result was a log entry for a synchronization error with an empty
529 string after "input=" when read() returned zero. If read() returned -1
530 (an event I could not check), uninitialized data bytes were printed.
531 There were reports of junk text (parts of files, etc) appearing after
534 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
536 PH/22 Added support for macro redefinition, and (re)definition in between
537 driver and ACL definitions.
539 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
540 forgetting to use the resulting value; it was using the unexpanded value.
542 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
543 hadn't been configured. The fix is from Juergen Kreileder, who
544 understands it better than I do:
546 "Here's what I see happening with three configured cyrus_sasl
547 authenticators configured (plain, login, cram-md5):
549 On startup auth_cyrus_sasl_init() gets called for each of these.
550 This means three calls to sasl_listmech() without a specified mech_list.
551 => SASL tests which mechs of all available mechs actually work
552 => three warnings about OTP not working
553 => the returned list contains: plain, login, cram-md5, digest-md5, ...
555 With the patch, sasl_listmech() also gets called three times. But now
556 SASL's mech_list option is set to the server_mech specified in the the
557 authenticator. Or in other words, the answer from sasl_listmech()
558 gets limited to just the mech you're testing for (which is different
560 => the return list contains just 'plain' or 'login', 'cram-md5' or
561 nothing depending on the value of ob->server_mech.
563 I've just tested the patch: Authentication still works fine,
564 unavailable mechs specified in the exim configuration are still
565 caught, and the auth.log warnings about OTP are gone."
567 PH/25 When debugging is enabled, the contents of the command line are added
568 to the debugging output, even when log_selector=+arguments is not
571 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
572 answer is "GNU", and only if the return is "GNU/something" is the answer
575 PH/27 $acl_verify_message is now set immediately after the failure of a
576 verification in an ACL, and so is available in subsequent modifiers. In
577 particular, the message can be preserved by coding like this:
579 warn !verify = sender
580 set acl_m0 = $acl_verify_message
582 Previously, $acl_verify_message was set only while expanding "message"
583 and "log_message" when a very denied access.
585 PH/28 Modified OS/os.c-Linux with
587 -#ifndef OS_LOAD_AVERAGE
588 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
590 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
591 nomenclature these days.)
593 PH/29 Installed patch from the Sieve maintainer that adds the options
594 sieve_useraddress and sieve_subaddress to the redirect router.
596 PH/30 In these circumstances:
597 . Two addresses routed to the same list of hosts;
598 . First host does not offer TLS;
599 . First host accepts first address;
600 . First host gives temporary error to second address;
601 . Second host offers TLS and a TLS session is established;
602 . Second host accepts second address.
603 Exim incorrectly logged both deliveries with the TLS parameters (cipher
604 and peerdn, if requested) that were in fact used only for the second
607 PH/31 When doing a callout as part of verifying an address, Exim was not paying
608 attention to any local part prefix or suffix that was matched by the
609 router that accepted the address. It now behaves in the same way as it
610 does for delivery: the affixes are removed from the local part unless
611 rcpt_include_affixes is set on the transport.
613 PH/32 Add the sender address, as F=<...>, to the log line when logging a
614 timeout during the DATA phase of an incoming message.
616 PH/33 Sieve envelope tests were broken for match types other than :is. I have
617 applied a patch sanctioned by the Sieve maintainer.
619 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
620 the uid or gid is negative. A case of a negative gid caused this to be
621 noticed. The fix allows for either to be negative.
623 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
624 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
627 PH/36 The change PH/12 above was broken. Fixed it.
629 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
630 the grounds that routing the same address twice would always produce the
631 same answer. This might have been true once, but it is certainly no
632 longer true now. Routing a child address may depend on the previous
633 routing that produced that child. Some complicated redirection strategies
634 went wrong when messages had multiple recipients, and made Exim's
635 behaviour dependent on the order in which the addresses were given.
637 I have moved the duplicate checking until after the routing is complete.
638 Exim scans the addresses that are assigned to local and remote
639 transports, and removes any duplicates. This means that more work will be
640 done, as duplicates will always all be routed, but duplicates are
641 presumably rare, so I don't expect this is of any significance.
643 For deliveries to pipes, files, and autoreplies, the duplicate checking
644 still happens during the routing process, since they are not going to be
647 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
648 It corrects a timeout issue with spamd. This is Ian's comment: "The
649 background is that sometimes spamd either never reads data from a
650 connection it has accepted, or it never writes response data. The exiscan
651 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
652 blindly assumes that writes won't block so it may never time out."
654 PH/39 Allow G after quota size as well as K and M.
656 PH/40 The value set for $authenticated_id in an authenticator may not contain
657 binary zeroes or newlines because the value is written to log lines and
658 to spool files. There was no check on this. Now the value is run through
659 the string_printing() function so that such characters are converted to
660 printable escape sequences.
662 PH/41 $message_linecount is a new variable that contains the total number of
663 lines in the message. Compare $body_linecount, which is the count for the
666 PH/42 Exim no longer gives details of delivery errors for specific addresses in
667 bounce and delay warning messages, except in certain special cases, which
670 (a) An SMTP error message from a remote host;
671 (b) A message specified in a :fail: redirection;
672 (c) A message specified in a "fail" command in a system filter;
673 (d) A message specified in a FAIL return from the queryprogram router;
674 (e) A message specified by the cannot_route_message router option.
676 In these cases only, Exim does include the error details in bounce and
677 warning messages. There are also a few cases where bland messages such
678 as "unrouteable address" or "local delivery error" are given.
680 PH/43 $value is now also set for the "else" part of a ${run expansion.
682 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
683 being worked on, but at least Exim now implements the latest version to
686 PH/45 In a pipe transport, although a timeout while waiting for the pipe
687 process to complete was treated as a delivery failure, a timeout while
688 writing the message to the pipe was logged, but erroneously treated as a
689 successful delivery. Such timeouts include transport filter timeouts. For
690 consistency with the overall process timeout, these timeouts are now
691 treated as errors, giving rise to delivery failures by default. However,
692 there is now a new Boolean option for the pipe transport called
693 timeout_defer, which, if set TRUE, converts the failures into defers for
694 both kinds of timeout. A transport filter timeout is now identified in
697 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
698 systems where "make" and "gmake" are different, calling "gmake" at top
699 level broke things. I've arranged for the value of $(MAKE) to be passed
700 from the Makefile to this script so that it can call the same version of
704 A note about Exim versions 4.44 and 4.50
705 ----------------------------------------
707 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
708 changes of various kinds. As a consequence, a big documentation update was
709 needed. This delayed the release for rather longer than seemed good, especially
710 in the light of a couple of (minor) security issues. Therefore, the changes
711 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
712 release. So 4.44 and 4.50 are in effect two different branches that both start
715 I have left the 4.50 change log unchanged; it contains all the changes since
716 4.43. The change log for 4.44 is below; many of its items are identical to
717 those for 4.50. This seems to be the most sensible way to preserve the
718 historical information.
724 1. Minor wording change to the doc/README.SIEVE file.
726 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
727 computation of the current number of files was incorrect.
729 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
730 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
733 4. Give more explanation in the error message when the command for a transport
734 filter fails to execute.
736 5. There are several places where Exim runs a non-Exim command in a
737 subprocess. The SIGUSR1 signal should be disabled for these processes. This
738 was being done only for the command run by the queryprogram router. It is
739 now done for all such subprocesses. The other cases are: ${run, transport
740 filters, and the commands run by the lmtp and pipe transports.
742 6. Added CONFIGURE_GROUP build-time option.
744 7. Some older OS have a limit of 256 on the maximum number of file
745 descriptors. Exim was using setrlimit() to set 1000 as a large value
746 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
747 systems. I've change it so that if it can't get 1000, it tries for 256.
749 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
750 was an oversight, and furthermore, ever since the addition of extra
751 controls (e.g. 4.43/32), the checks on when to allow different forms of
752 "control" were broken. There should now be diagnostics for all cases when a
753 control that does not make sense is encountered.
755 9. Added the /retain_sender option to "control=submission".
757 10. $recipients is now available in the predata ACL (oversight).
759 11. Tidy the search cache before the fork to do a delivery from a message
760 received from the command line. Otherwise the child will trigger a lookup
761 failure and thereby defer the delivery if it tries to use (for example) a
762 cached ldap connection that the parent has called unbind on.
764 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
765 of $address_data from the recipient verification was clobbered by the
768 13. The value of address_data from a sender verification is now available in
769 $sender_address_data in subsequent conditions in the ACL statement.
771 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
773 15. Added a new option "connect=<time>" to callout options, to set a different
776 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
777 was its contents. (It was OK if the option was not defined at all.)
779 17. A "Completed" log line is now written for messages that are removed from
780 the spool by the -Mrm option.
782 18. New variables $sender_verify_failure and $recipient_verify_failure contain
783 information about exactly what failed.
785 19. Added -dd to debug only the daemon process.
787 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
788 handles timeouts, both on the server side and network timeouts. Renamed the
789 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
791 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
792 It is now set to "smtps".
794 22. $host_address is now set to the target address during the checking of
797 23. When checking ignore_target_hosts for an ipliteral router, no host name was
798 being passed; this would have caused $sender_host_name to have been used if
799 matching the list had actually called for a host name (not very likely,
800 since this list is usually IP addresses). A host name is now passed as
803 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
804 code that specifies a non-restarting handler (typically sigaction() in
805 modern systems) in an attempt to fix a rare and obscure crash bug.
807 25. Narrowed the window for a race in the daemon that could cause it to ignore
808 SIGCHLD signals. This is not a major problem, because they are used only to
809 wake it up if nothing else does.
811 26. A malformed maildirsize file could cause Exim to calculate negative values
812 for the mailbox size or file count. Odd effects could occur as a result.
813 The maildirsize information is now recalculated if the size or filecount
816 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
817 support for a long time. Removed HAVE_SYS_VFS_H.
819 28. Installed the latest version of exipick from John Jetmore.
821 29. In an address list, if the pattern was not a regular expression, an empty
822 subject address (from a bounce message) matched only if the pattern was an
823 empty string. Non-empty patterns were not even tested. This was the wrong
824 because it is perfectly reasonable to use an empty address as part of a
825 database query. An empty address is now tested by patterns that are
826 lookups. However, all the other forms of pattern expect the subject to
827 contain a local part and a domain, and therefore, for them, an empty
828 address still always fails if the pattern is not itself empty.
830 30. Exim went into a mad DNS loop when attempting to do a callout where the
831 host was specified on an smtp transport, and looking it up yielded more
834 31. Re-factored the code for checking spool and log partition space into a
835 function that finds that data and another that does the check. The former
836 is then used to implement four new variables: $spool_space, $log_space,
837 $spool_inodes, and $log_inodes.
839 32. The RFC2047 encoding function was originally intended for short strings
840 such as real names; it was not keeping to the 75-character limit for
841 encoded words that the RFC imposes. It now respects the limit, and
842 generates multiple encoded words if necessary. To be on the safe side, I
843 have increased the buffer size for the ${rfc2047: expansion operator from
846 33. It is now permitted to omit both strings after an "if" condition; if the
847 condition is true, the result is "true". As before, when the second string
848 is omitted, a false condition yields an empty string. This makes it less
849 cumbersome to write custom ACL and router conditions.
851 34. Failure to deliver a bounce message always caused it to be frozen, even if
852 there was an errors_to setting on the router. The errors_to setting is now
855 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
856 canonical form (fully expanded) before being placed in
857 $sender_host_address.
859 36. The table in the code that translates DNS record types into text (T_A to
860 "A" for instance) was missing entries for NS and CNAME. It is just possible
861 that this could have caused confusion if both these types were looked up
862 for the same domain, because the text type is used as part of Exim's
863 per-process caching. But the chance of anyone hitting this buglet seems
866 37. The dnsdb lookup has been extended in a number of ways.
868 (1) There is a new type, "zns", which walks up the domain tree until it
869 finds some nameserver records. It should be used with care.
871 (2) There is a new type, "mxh", which is like "mx" except that it returns
872 just the host names, not the priorities.
874 (3) It is now possible to give a list of domains (or IP addresses) to be
875 looked up. The behaviour when one of the lookups defers can be
876 controlled by a keyword.
878 (4) It is now possible to specify the separator character for use when
879 multiple records are returned.
881 38. The dnslists ACL condition has been extended: it is now possible to supply
882 a list of IP addresses and/or domains to be looked up in a particular DNS
885 39. Added log_selector=+queue_time_overall.
887 40. When running the queue in the test harness, wait just a tad after forking a
888 delivery process, to get repeatability of debugging output.
890 41. Include certificate and key file names in error message when GnuTLS fails
891 to set them up, because the GnuTLS error message doesn't include the name
892 of the failing file when there is a problem reading it.
894 42. Allow both -bf and -bF in the same test run.
896 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
898 44. The "Exiscan patch" is now merged into the mainline Exim source.
900 45. Sometimes the final signoff response after QUIT could fail to get
901 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
902 < 0 before doing a fflush(). This bug looks as though it goes back to the
903 introduction of TLS in release 3.20, but "sometimes" must have been rare
904 because the tests only now provoked it.
906 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
907 (this can affect the format of dates).
909 47. exim_tidydb, when checking for the continued existence of a message for
910 which it has found a message-specific retry record, was not finding
911 messages that were in split spool directories. Consequently, it was
912 deleting retry records that should have stayed in existence.
914 48. Steve fixed some bugs in eximstats.
916 49. The SPA authentication driver was not abandoning authentication and moving
917 on to the next authenticator when an expansion was forced to fail,
918 contradicting the general specification for all authenticators. Instead it
919 was generating a temporary error. It now behaves as specified.
921 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
922 (the order specifies the preference for clients). The order is now AES256,
923 AES128, 3DES, ARCFOUR128.
925 51. Small patch to Sieve code - explicitly set From: when generating an
928 52. Exim crashed if a remote delivery caused a very long error message to be
929 recorded - for instance if somebody sent an entire SpamAssassin report back
930 as a large number of 550 error lines. This bug was coincidentally fixed by
931 increasing the size of one of Exim's internal buffers (big_buffer) that
932 happened as part of the Exiscan merge. However, to be on the safe side, I
933 have made the code more robust (and fixed the comments that describe what
936 53. Now that there can be additional text after "Completed" in log lines (if
937 the queue_time_overall log selector is set), a one-byte patch to exigrep
938 was needed to allow it to recognize "Completed" as not the last thing in
941 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
942 patch that reportedly fixes this has been added. I am not expert enough to
943 create a test for it. This is what the patch creator wrote:
945 "I found a little strange behaviour of ldap code when working with
946 Windows 2003 AD Domain, where users was placed in more than one
947 Organization Units. When I tried to give exim partial DN, the exit code
948 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
949 But simultaneously result of request was absolutely normal ldap result,
950 so I produce this patch..."
952 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
953 REFERENCE, so I have modified the code to exclude the patch when that macro
956 55. Some experimental protocols are using DNS PTR records for new purposes. The
957 keys for these records are domain names, not reversed IP addresses. The
958 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
959 leaves it alone. Component reversal etc. now happens only for IP addresses.
962 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
964 57. Double the size of the debug message buffer (to 2048) so that more of very
965 long debug lines gets shown.
967 58. The exicyclog utility now does better if the number of log files to keep
968 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
970 59. Two changes related to the smtp_active_hostname option:
972 (1) $smtp_active_hostname is now available as a variable.
973 (2) The default for smtp_banner uses $smtp_active_hostname instead
974 of $primary_hostname.
976 60. The host_aton() function is supposed to be passed a string that is known
977 to be a valid IP address. However, in the case of IPv6 addresses, it was
978 not checking this. This is a hostage to fortune. Exim now panics and dies
979 if the condition is not met. A case was found where this could be provoked
980 from a dnsdb PTR lookup with an IPv6 address that had more than 8
981 components; fortuitously, this particular loophole had already been fixed
982 by change 4.50/55 above.
984 If there are any other similar loopholes, the new check in host_aton()
985 itself should stop them being exploited. The report I received stated that
986 data on the command line could provoke the exploit when Exim was running as
987 exim, but did not say which command line option was involved. All I could
988 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
992 61. There was a buffer overflow vulnerability in the SPA authentication code
993 (which came originally from the Samba project). I have added a test to the
994 spa_base64_to_bits() function which I hope fixes it.
997 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
998 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1000 63. The daemon start-up calls getloadavg() while still root for those OS that
1001 need the first call to be done as root, but it missed one case: when
1002 deliver_queue_load_max is set with deliver_drop_privilege. This is
1003 necessary for the benefit of the queue runner, because there is no re-exec
1004 when deliver_drop_privilege is set.
1006 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1007 This has been fixed.
1009 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1010 was in use, was not putting the data itself into the right store pool;
1011 consequently, it could be overwritten for a subsequent message in the same
1012 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1015 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1017 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1018 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1019 the function were treating the return as a boolean value, which happened to
1020 work because 0=false and not-0=true, but is not correct code.
1022 68. The host_aton() function was not handling scoped IPv6 addresses (those
1023 with, for example, "%eth0" on the end) correctly.
1025 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1026 negated items (that is, ~something) in unsigned ints. Some compilers
1027 apparently mutter when there is no cast.
1029 70. If an address verification called from an ACL failed, and did not produce a
1030 user-specific message (i.e. there was only a "system" message), nothing was
1031 put in $acl_verify_message. In this situation, it now puts the system
1034 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1035 session; change 4.31/43 added the unwanted input to the log line - except
1036 that it did not do this in the start of session case. It now does.
1038 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1039 This is wrong and can cause the other end to generate a synchronization
1040 error if it is another Exim or anything else that does the synchronization
1041 check. A QUIT command is no longer sent after a timeout.
1043 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1044 during host lookups.
1046 74. The defer_ok option of callout verification was not working if it was used
1047 when verifying addresses in header lines, that is, for this case:
1049 verify = header_sender/callout=defer_ok
1051 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1052 those file descriptors could be used for SMTP connections. If anything
1053 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1054 could be sent to the SMTP client, causing chaos. The daemon now opens
1055 stdin, stdout, and stderr to /dev/null when it puts itself into the
1058 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1059 log by default. The user can override this with suitable Perl magic.
1061 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1062 the log message when discard triggers, was not working for the DATA ACL or
1063 for the non-SMTP ACL.
1065 78. Error message wording change in sieve.c.
1067 79. If smtp_accept_max_per_host was set, the number of connections could be
1068 restricted to fewer than expected, because the daemon was trying to set up
1069 a new connection before checking whether the processes handling previous
1070 connections had finished. The check for completed processes is now done
1071 earlier. On busy systems, this bug wouldn't be noticed because something
1072 else would have woken the daemon, and it would have reaped the completed
1075 80. If a message was submitted locally by a user whose login name contained one
1076 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1077 It caused a spool format error. I have fixed the spool reading code. A
1078 related problem was that the "from" clause in the Received: line became
1079 illegal because of the space(s). It is now covered by ${quote_local_part.
1081 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1084 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1086 83. Patch from Sieve maintainer to fix unterminated string problem in
1087 "vacation" handling.
1089 84. Some minor changes to the Linux configuration files to help with other
1090 OS variants using glibc.
1092 85. One more patch for Sieve to update vacation handling to latest spec.
1095 ----------------------------------------------------
1096 See the note above about the 4.44 and 4.50 releases.
1097 ----------------------------------------------------
1103 1. Change 4.43/35 introduced a bug that caused file counts to be
1104 incorrectly computed when quota_filecount was set in an appendfile
1107 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1108 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1111 3. Give more explanation in the error message when the command for a transport
1112 filter fails to execute.
1114 4. There are several places where Exim runs a non-Exim command in a
1115 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1116 was being done only for the command run by the queryprogram router. It is
1117 now done for all such subprocesses. The other cases are: ${run, transport
1118 filters, and the commands run by the lmtp and pipe transports.
1120 5. Some older OS have a limit of 256 on the maximum number of file
1121 descriptors. Exim was using setrlimit() to set 1000 as a large value
1122 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1123 systems. I've change it so that if it can't get 1000, it tries for 256.
1125 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1126 was an oversight, and furthermore, ever since the addition of extra
1127 controls (e.g. 4.43/32), the checks on when to allow different forms of
1128 "control" were broken. There should now be diagnostics for all cases when a
1129 control that does not make sense is encountered.
1131 7. $recipients is now available in the predata ACL (oversight).
1133 8. Tidy the search cache before the fork to do a delivery from a message
1134 received from the command line. Otherwise the child will trigger a lookup
1135 failure and thereby defer the delivery if it tries to use (for example) a
1136 cached ldap connection that the parent has called unbind on.
1138 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1139 of $address_data from the recipient verification was clobbered by the
1140 sender verification.
1142 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1143 was its contents. (It was OK if the option was not defined at all.)
1145 11. A "Completed" log line is now written for messages that are removed from
1146 the spool by the -Mrm option.
1148 12. $host_address is now set to the target address during the checking of
1149 ignore_target_hosts.
1151 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1152 being passed; this would have caused $sender_host_name to have been used if
1153 matching the list had actually called for a host name (not very likely,
1154 since this list is usually IP addresses). A host name is now passed as
1157 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1158 code that specifies a non-restarting handler (typically sigaction() in
1159 modern systems) in an attempt to fix a rare and obscure crash bug.
1161 15. Narrowed the window for a race in the daemon that could cause it to ignore
1162 SIGCHLD signals. This is not a major problem, because they are used only to
1163 wake it up if nothing else does.
1165 16. A malformed maildirsize file could cause Exim to calculate negative values
1166 for the mailbox size or file count. Odd effects could occur as a result.
1167 The maildirsize information is now recalculated if the size or filecount
1170 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1171 support for a long time. Removed HAVE_SYS_VFS_H.
1173 18. Updated exipick to current release from John Jetmore.
1175 19. Allow an empty sender to be matched against a lookup in an address list.
1176 Previously the only cases considered were a regular expression, or an
1179 20. Exim went into a mad DNS lookup loop when doing a callout where the
1180 host was specified on the transport, if the DNS lookup yielded more than
1183 21. The RFC2047 encoding function was originally intended for short strings
1184 such as real names; it was not keeping to the 75-character limit for
1185 encoded words that the RFC imposes. It now respects the limit, and
1186 generates multiple encoded words if necessary. To be on the safe side, I
1187 have increased the buffer size for the ${rfc2047: expansion operator from
1190 22. Failure to deliver a bounce message always caused it to be frozen, even if
1191 there was an errors_to setting on the router. The errors_to setting is now
1194 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1195 canonical form (fully expanded) before being placed in
1196 $sender_host_address.
1198 24. Updated eximstats to version 1.33
1200 25. Include certificate and key file names in error message when GnuTLS fails
1201 to set them up, because the GnuTLS error message doesn't include the name
1202 of the failing file when there is a problem reading it.
1204 26. Expand error message when OpenSSL has problems setting up cert/key files.
1207 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1208 (this can affect the format of dates).
1210 28. exim_tidydb, when checking for the continued existence of a message for
1211 which it has found a message-specific retry record, was not finding
1212 messages that were in split spool directories. Consequently, it was
1213 deleting retry records that should have stayed in existence.
1215 29. eximstats updated to version 1.35
1216 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1217 1.35 - bugfix such that pie charts by volume are generated correctly
1219 30. The SPA authentication driver was not abandoning authentication and moving
1220 on to the next authenticator when an expansion was forced to fail,
1221 contradicting the general specification for all authenticators. Instead it
1222 was generating a temporary error. It now behaves as specified.
1224 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1225 (the order specifies the preference for clients). The order is now AES256,
1226 AES128, 3DES, ARCFOUR128.
1228 31. Small patch to Sieve code - explicitly set From: when generating an
1231 32. Exim crashed if a remote delivery caused a very long error message to be
1232 recorded - for instance if somebody sent an entire SpamAssassin report back
1233 as a large number of 550 error lines. This bug was coincidentally fixed by
1234 increasing the size of one of Exim's internal buffers (big_buffer) that
1235 happened as part of the Exiscan merge. However, to be on the safe side, I
1236 have made the code more robust (and fixed the comments that describe what
1239 33. Some experimental protocols are using DNS PTR records for new purposes. The
1240 keys for these records are domain names, not reversed IP addresses. The
1241 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1242 leaves it alone. Component reversal etc. now happens only for IP addresses.
1245 34. The host_aton() function is supposed to be passed a string that is known
1246 to be a valid IP address. However, in the case of IPv6 addresses, it was
1247 not checking this. This is a hostage to fortune. Exim now panics and dies
1248 if the condition is not met. A case was found where this could be provoked
1249 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1250 components; fortuitously, this particular loophole had already been fixed
1251 by change 4.50/55 or 4.44/33 above.
1253 If there are any other similar loopholes, the new check in host_aton()
1254 itself should stop them being exploited. The report I received stated that
1255 data on the command line could provoke the exploit when Exim was running as
1256 exim, but did not say which command line option was involved. All I could
1257 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1258 running as the user.
1261 35. There was a buffer overflow vulnerability in the SPA authentication code
1262 (which came originally from the Samba project). I have added a test to the
1263 spa_base64_to_bits() function which I hope fixes it.
1266 36. The daemon start-up calls getloadavg() while still root for those OS that
1267 need the first call to be done as root, but it missed one case: when
1268 deliver_queue_load_max is set with deliver_drop_privilege. This is
1269 necessary for the benefit of the queue runner, because there is no re-exec
1270 when deliver_drop_privilege is set.
1272 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1273 was in use, was not putting the data itself into the right store pool;
1274 consequently, it could be overwritten for a subsequent message in the same
1275 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1278 38. Sometimes the final signoff response after QUIT could fail to get
1279 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1280 < 0 before doing a fflush(). This bug looks as though it goes back to the
1281 introduction of TLS in release 3.20, but "sometimes" must have been rare
1282 because the tests only now provoked it.
1288 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1289 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1290 Now it returns an integer. A number of calls were still expecting a T/F
1291 return. Fortuitously, in all cases, the tests worked in OK situations,
1292 which is the norm. However, things would have gone wrong on any write
1293 failures on the smtp file descriptor. This function is used when sending
1294 messages over SMTP and also when doing verify callouts.
1296 2. When Exim is called to do synchronous delivery of a locally submitted
1297 message (the -odf or -odi options), it no longer closes stderr before doing
1300 3. Implemented the mua_wrapper option.
1302 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1304 5. Implemented the functions header_remove(), header_testname(),
1305 header_add_at_position(), and receive_remove_recipient(), and exported them
1308 6. If an ACL "warn" statement specified the addition of headers, Exim already
1309 inserted X-ACL-Warn: at the start if there was no header name. However, it
1310 was not making this test for the second and subsequent header lines if
1311 there were newlines in the string. This meant that an invalid header could
1312 be inserted if Exim was badly configured.
1314 7. Allow an ACL "warn" statement to add header lines at the start or after all
1315 the Received: headers, as well as at the end.
1317 8. Added the rcpt_4xx retry error code.
1319 9. Added postmaster_mailfrom=xxx to callout verification option.
1321 10. Added mailfrom=xxxx to the callout verification option, for verify=
1324 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1325 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1327 12. Inserted some casts to stop certain compilers warning when using pointer
1328 differences as field lengths or precisions in printf-type calls (mostly
1329 affecting debugging statements).
1331 13. Added optional readline() support for -be (dynamically loaded).
1333 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1334 same clock tick as a message's arrival, so that its received time was the
1335 same as the "first fail" time on the retry record, and that message
1336 remained on the queue past the ultimate address timeout, every queue runner
1337 would try a delivery (because it was past the ultimate address timeout) but
1338 after another failure, the ultimate address timeout, which should have then
1339 bounced the address, did not kick in. This was a "< instead of <=" error;
1340 in most cases the first failure would have been in the next clock tick
1341 after the received time, and all would be well.
1343 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1344 being recognized when the domain list was tested by the match_domain
1345 condition in an expansion string.
1347 16. Added the ${str2b64: operator.
1349 17. Exim was always calling setrlimit() to set a large limit for the number of
1350 processes, without checking whether the existing limit was already
1351 adequate. (It did check for the limit on file descriptors.) Furthermore,
1352 errors from getrlimit() and setrlimit() were being ignored. Now they are
1353 logged to the main and panic logs, but Exim does carry on, to try to do its
1354 job under whatever limits there are.
1356 18. Imported PCRE 5.0.
1358 19. Trivial typo in log message " temporarily refused connection" (the leading
1361 20. If the log selector return_path_on_delivery was set and an address was
1362 redirected to /dev/null, the delivery process crashed because it assumed
1363 that a return path would always be set for a "successful" delivery. In this
1364 case, the whole delivery is bypassed as an optimization, and therefore no
1367 21. Internal re-arrangement: the function for sending a challenge and reading
1368 a response while authentication was assuming a zero-terminated challenge
1369 string. It's now changed to take a pointer and a length, to allow for
1370 binary data in such strings.
1372 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1374 23. Exim was not respecting finduser_retries when seeking the login of the
1375 uid under which it was called; it was always trying 10 times. (The default
1376 setting of finduser_retries is zero.) Also, it was sleeping after the final
1377 failure, which is pointless.
1379 24. Implemented tls_on_connect_ports.
1381 25. Implemented acl_smtp_predata.
1383 26. If the domain in control=submission is set empty, Exim assumes that the
1384 authenticated id is a complete email address when it generates From: or
1385 Sender: header lines.
1387 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1388 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1389 chown and chgrp in /bin and hostname in /usr/bin.
1391 28. Exim was keeping the "process log" file open after each use, just as it
1392 does for the main log. This opens the possibility of it remaining open for
1393 long periods when the USR1 signal hits a daemon. Occasional processlog
1394 errors were reported, that could have been caused by this. Anyway, it seems
1395 much more sensible not to leave this file open at all, so that is what now
1398 29. The long-running daemon process does not normally write to the log once it
1399 has entered its main loop, and it closes the log before doing so. This is
1400 so that log files can straightforwardly be renamed and moved. However,
1401 there are a couple of unusual error situations where the daemon does write
1402 log entries, and I had neglected to close the log afterwards.
1404 30. The text of an SMTP error response that was received during a remote
1405 delivery was being truncated at 512 bytes. This is too short for some of
1406 the long messages that one sometimes sees. I've increased the limit to
1409 31. It is now possible to make retry rules that apply only when a message has a
1410 specific sender, in particular, an empty sender.
1412 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1413 it possible to be selective about when SMTP synchronization is enforced.
1415 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1417 32. Implemented hosts_connection_nolog.
1419 33. Added an ACL for QUIT.
1421 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1424 35. Added mailbox_size and mailbox_filecount to appendfile.
1426 36. Added control = no_multiline_responses to ACLs.
1428 37. There was a bug in the logic of the code that waits for the clock to tick
1429 in the case where the clock went backwards by a substantial amount such
1430 that the microsecond fraction of "now" was more than the microsecond
1431 fraction of "then" (but the whole seconds number was less).
1433 38. Added support for the libradius Radius client library this is found on
1434 FreeBSD (previously only the radiusclient library was supported).
1440 1. When certain lookups returned multiple values in the form name=value, the
1441 quoting of the values was not always being done properly. Specifically:
1442 (a) If the value started with a double quote, but contained no whitespace,
1444 (b) If the value contained whitespace other than a space character (i.e.
1445 tabs or newlines or carriage returns) it was not quoted.
1446 This fix has been applied to the mysql and pgsql lookups by writing a
1447 separate quoting function and calling it from the lookup code. The fix
1448 should probably also be applied to nisplus, ibase and oracle lookups, but
1449 since I cannot test any of those, I have not disturbed their existing code.
1451 2. A hit in the callout cache for a specific address caused a log line with no
1452 reason for rejecting RCPT. Now it says "Previous (cached) callout
1453 verification failure".
1455 3. There was an off-by-one bug in the queryprogram router. An over-long
1456 return line was truncated at 256 instead of 255 characters, thereby
1457 overflowing its buffer with the terminating zero. As well as fixing this, I
1458 have increased the buffer size to 1024 (and made a note to document this).
1460 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1461 when Exim is waiting for an SMTP response from a remote server, Exim
1462 restarts its select() call on the socket, thereby resetting its timeout.
1463 This is not a problem when such interrupts are rare. Somebody set up a cron
1464 job to run exiwhat every 2 minutes, which is less than the normal select()
1465 timeout (5 or 10 minutes). This meant that the select() timeout never
1466 kicked in because it was always reset. I have fixed this by comparing the
1467 time when an interrupt arrives with the time at the start of the first call
1468 to select(). If more time than the timeout has elapsed, the interrupt is
1469 treated as a timeout.
1471 5. Some internal re-factoring in preparation for the addition of Sieve
1472 extensions (by MH). In particular, the "personal" test is moved to a
1473 separate function, and given an option for scanning Cc: and Bcc: (which is
1474 not set for Exim filters).
1476 6. When Exim created an email address using the login of the caller as the
1477 local part (e.g. when creating a From: or Sender: header line), it was not
1478 quoting the local part when it contained special characters such as @.
1480 7. Installed new OpenBSD configuration files.
1482 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1483 try to make them clearer.
1485 9. Callout options, other than the timeout value, were being ignored when
1486 verifying sender addresses in header lines. For example, when using
1488 verify = header_sender/callout=no_cache
1490 the cache was (incorrectly) being used.
1492 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1493 only the Cygwin environment.
1495 11. When return_path_on_delivery was set as a log selector, if different remote
1496 addresses in the same message used different return paths and parallel
1497 remote delivery occurred, the wrong values would sometimes be logged.
1498 (Whenever a remote delivery process finished, the return path value from
1499 the most recently started remote delivery process was logged.)
1501 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1502 lines when AUTH and/or TLS are in use. This is the "received protocol"
1503 field. Exim used to use "asmtp" for authenticated SMTP, without any
1504 indication (in the protocol name) for TLS use. Now it follows the RFC and
1505 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1506 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1507 names appear in log lines as well as in Received: header lines.
1509 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1510 extensions, and comparison tests, and to fix some bugs.
1512 14. Changes to the "personal" filter test:
1514 (1) The test was buggy in that it was just doing the equivalent of
1515 "contains" tests on header lines. For example, if a user's address was
1516 anne@some.where, the "personal" test would incorrectly be true for
1518 To: susanne@some.where
1520 This test is now done by extracting each address from the header in turn,
1521 and checking the entire address. Other tests that are part of "personal"
1522 are now done using regular expressions (for example, to check local parts
1523 of addresses in From: header lines).
1525 (2) The list of non-personal local parts in From: addresses has been
1526 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1527 taken from the Sieve specification recommendations.
1529 (3) If the message contains any header line starting with "List-" it is
1530 treated as non-personal.
1532 (4) The test for "circular" in the Subject: header line has been removed
1533 because it now seems ill-conceived.
1535 15. Minor typos in src/EDITME comments corrected.
1537 16. Installed latest exipick from John Jetmore.
1539 17. If headers_add on a router specified a text string that was too long for
1540 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1541 of string_sprintf() is now avoided.
1543 18. $message_body_size was not set (it was always zero) when running the DATA
1544 ACL and the local_scan() function.
1546 19. For the "mail" command in an Exim filter, no default was being set for
1547 the once_repeat time, causing a random time value to be used if "once" was
1548 specified. (If the value happened to be <= 0, no repeat happened.) The
1549 default is now 0s, meaning "never repeat". The "vacation" command was OK
1550 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1551 (I found it when inspecting the code).
1553 20. There is now an overall timeout for performing a callout verification. It
1554 defaults to 4 times the callout timeout, which applies to individual SMTP
1555 commands during the callout. The overall timeout applies when there is more
1556 than one host that can be tried. The timeout is checked before trying the
1557 next host. This prevents very long delays if there are a large number of
1558 hosts and all are timing out (e.g. when the network connections are timing
1559 out). The value of the overall timeout can be changed by specifying an
1560 additional sub-option for "callout", called "maxwait". For example:
1562 verify = sender/callout=5s,maxwait=20s
1564 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1565 to the end before writing, but this should make it even safer).
1567 22. Exim was forgetting that it had advertised PIPELINING for the second and
1568 subsequent messages on an SMTP connection. It was also not resetting its
1569 memory on STARTTLS and an internal HELO.
1571 23. When Exim logs an SMTP synchronization error within a session, it now
1572 records whether PIPELINING has been advertised or not.
1574 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1575 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1576 rather than long int.
1578 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1580 26. Added the never_mail option to autoreply.
1586 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1587 crash if the getsockname() call failed; this can happen if a connection is
1588 closed very soon after it is established. The problem was simply in the
1589 order in which certain operations were done, causing Exim to try to write
1590 to the SMTP stream before it had set up the file descriptor. The bug has
1591 been fixed by making things happen in the correct order.
1597 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1598 before the connection was closed, thus losing the rejection response.
1600 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1601 some early Solaris releases, but causes trouble in current releases where
1602 socklen_t is defined.
1604 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1607 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1610 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1611 that releasing the top of it at the end releases what was used for sub-
1612 expansions (unless the block got too big). However, discard this block if
1613 the first thing is a variable or header, so that we can use its block when
1614 it is dynamic (useful for very large $message_headers, for example).
1616 6. Lookups now cache *every* query, not just the most recent. A new, separate
1617 store pool is used for this. It can be recovered when all lookup caches are
1618 flushed. Lookups now release memory at the end of their result strings.
1619 This has involved some general refactoring of the lookup sources.
1621 7. Some code has been added to the store_xxx() functions to reduce the amount
1622 of flapping under certain conditions.
1624 8. log_incoming_interface used to affect only the <= reception log lines. Now
1625 it causes the local interface and port to be added to several more SMTP log
1626 lines, for example "SMTP connection from", and rejection lines.
1628 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1630 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1632 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1633 could be overwritten at the end of the current message (or the start of a
1634 new message if it was set in a HELO ACL). The value is now preserved for
1635 the duration of the SMTP connection.
1637 12. If a transport had a headers_rewrite setting, and a matching header line
1638 contained an unqualified address, that address was qualified, even if it
1639 did not match any rewriting rules. The underlying bug was that the values
1640 of the flags that permit the existence of unqualified sender and recipient
1641 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1642 non-local messages, and by -bnq for local messages) were not being
1643 preserved with the message after it was received.
1645 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1646 "next input=" as part of the text comprising the host identity instead of
1647 the correct text. The code was using the same buffer for two different
1648 strings. However, depending on which order the printing function evaluated
1649 its arguments, the bug did not always show up. Under Linux, for example, my
1650 test suite worked just fine.
1652 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1653 doesn't work with some older versions of Perl. It has been changed to "my",
1654 which in any case is probably the better facility to use.
1656 15. A really picky compiler found some instances of statements for creating
1657 error messages that either had too many or two few arguments for the format
1660 16. The size of the buffer for calls to the DNS resolver has been increased
1661 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1662 for addresses that have a lot of PTR records. This alleviates a problem; it
1663 does not fully solve it.
1665 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1666 buffer now truncates the list and logs the incident, which is the same
1667 action as happens when Exim is looking up a host name and its aliases.
1668 Previously in this situation something unpredictable would happen;
1669 sometimes it was "internal error: store_reset failed".
1671 18. If a server dropped the connection unexpectedly when an Exim client was
1672 using GnuTLS and trying to read a response, the client delivery process
1673 crashed while trying to generate an error log message.
1675 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1676 string, for example:
1678 warn message = H1: something\nH2: something
1680 the text was added as a single header line from Exim's point of view
1681 though it ended up OK in the delivered message. However, searching for the
1682 second and subsequent header lines using $h_h2: did not work. This has been
1683 fixed. Similarly, if a system filter added multiple headers in this way,
1684 the routers could not see them.
1686 20. Expanded the error message when iplsearch is called with an invalid key to
1687 suggest using net-iplsearch in a host list.
1689 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1690 ACLs are no longer actually imposed (and a message to that effect is
1693 22. If a "gecos" field in a passwd entry contained escaped characters, in
1694 particular, if it contained a \" sequence, Exim got it wrong when building
1695 a From: or a Sender: header from that name. A second bug also caused
1696 incorrect handling when an unquoted " was present following a character
1697 that needed quoting.
1699 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1700 was not being matched caselessly.
1702 24. Arranged for all hyphens in the exim.8 source to be escaped with
1705 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1706 properly. Recipient callout cache records were still being keyed to include
1707 the sender, even when use_sender was set false. This led to far more
1708 callouts that were necessary. The sender is no longer included in the key
1709 when use_sender is false.
1711 26. Added "control = submission" modifier to ACLs.
1713 27. Added the ${base62d: operator to decode base 62 numbers.
1715 28. dnsdb lookups can now access SRV records.
1717 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1718 the configuration file.
1720 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1721 (-v) mode. This makes the output for a verbose queue run more intelligible.
1723 31. Added a use_postmaster feature to recipient callouts.
1725 32. Added the $body_zerocount variable, containing the number of binary zero
1726 bytes in the message body.
1728 33. The time of last modification of the "new" subdirectory is now used as the
1729 "mailbox time last read" when there is a quota error for a maildir
1732 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1734 35. Added +ignore_unknown as a special item in host lists.
1736 36. Code for decoding IPv6 addresses in host lists is now included, even if
1737 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1738 address was recognized as an IP address, but was then not correctly decoded
1739 into binary, causing unexpected and incorrect effects when compared with
1746 1. Very minor rewording of debugging text in manualroute to say "list of
1747 hosts" instead of "hostlist".
1749 2. If verify=header_syntax was set, and a header line with an unqualified
1750 address (no domain) and a large number of spaces between the end of the
1751 name and the colon was received, the reception process suffered a buffer
1752 overflow, and (when I tested it) crashed. This was caused by some obsolete
1753 code that should have been removed. The fix is to remove it!
1755 3. When running in the test harness, delay a bit after writing a bounce
1756 message to get a bit more predictability in the log output.
1758 4. Added a call to search_tidyup() just before forking a reception process. In
1759 theory, someone could use a lookup in the expansion of smtp_accept_max_
1760 per_host which, without the tidyup, could leave open a database connection.
1762 5. Added the variables $recipient_data and $sender_data which get set from a
1763 lookup success in an ACL "recipients" or "senders" condition, or a router
1764 "senders" option, similar to $domain_data and $local_part_data.
1766 6. Moved the writing of debug_print from before to after the "senders" test
1769 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1770 problems for message scanning, either using a data ACL, or using
1771 local_scan() because the Received: header was not generated till after they
1772 were called (in order to set the time as the time of reception completion).
1773 I have revised the way this works. The header is now generated after the
1774 body is received, but before the ACL or local_scan() are called. After they
1775 are run, the timestamp in the header is updated.
1781 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1782 before starting a queue runner without re-exec. This happened only when
1783 deliver_drop_privilege was set or when the Exim user was set to root. The
1784 effect of the bug was that timeouts during subsequent deliveries caused
1785 crashes instead of being properly handled. The handler is now left at its
1786 default (and expected) setting.
1788 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1789 message, again when deliver_drop_privilege is set or Exim is run as root.
1790 The bug described in (1) was not present in this case, but the tidying up
1791 of the other signals was missing. I have made the two cases consistent.
1793 3. The ignore_target_hosts setting on a manualroute router was being ignored
1794 for hosts that were looked up using the /MX notation.
1796 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1799 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1800 operated on the sender address. After changing the $sender_address to <>
1801 for the sender address verify, Exim was re-instated it as the original
1802 (before rewriting) address, but remembering that it had rewritten it, so it
1803 wasn't rewriting it again. This bug also had the effect of breaking the
1804 sender address verification caching when the sender address was rewritten.
1806 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1807 This has been changed so that if the ip literal address matches
1808 ignore_target_hosts, the router declines.
1810 7. Added expansion conditions match_domain, match_address, and match_local_
1811 part (NOT match_host).
1813 8. The placeholder for the Received: header didn't have a length field set.
1815 9. Added code to Exim itself and to exim_lock to test for a specific race
1816 condition that could lead to file corruption when using MBX delivery. The
1817 issue is with the lockfile that is created in /tmp. If this file is removed
1818 after a process has opened it but before that process has acquired a lock,
1819 there is the potential for a second process to recreate the file and also
1820 acquire a lock. This could lead to two Exim processes writing to the file
1821 at the same time. The added code performs the same test as UW imapd; it
1822 checks after acquiring the lock that its file descriptor still refers to
1823 the same named file.
1825 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1826 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1829 11. Added the smtp_active_hostname option. If used, this will typically be made
1830 to depend on the incoming interface address. Because $interface_address is
1831 not set up until the daemon has forked a reception process, error responses
1832 that can happen earlier (such as "too many connections") no longer contain
1835 12. If an expansion in a condition on a "warn" statement fails because a lookup
1836 defers, the "warn" statement is abandoned, and the next ACL statement is
1837 processed. Previously this caused the whole ACL to be aborted.
1839 13. Added the iplsearch lookup type.
1841 14. Added ident_timeout as a log selector.
1843 15. Added tls_certificate_verified as a log selector.
1845 16. Added a global option tls_require_ciphers (compare the smtp transport
1846 option of the same name). This controls incoming TLS connections.
1848 17. I finally figured out how to make tls_require_ciphers do a similar thing
1849 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1850 before starting the TLS session.
1852 18. Tabs are now shown as \t in -bP output.
1854 19. If the log selector return_path_on_delivery was set, Exim crashed when
1855 bouncing a message because it had too many Received: header lines.
1857 20. If two routers both had headers_remove settings, and the first one included
1858 a superfluous trailing colon, the final name in the first list and the
1859 first name in the second list were incorrectly joined into one item (with a
1860 colon in the middle).
1866 1. Added -C and -D options to the exinext utility, mainly to make it easier
1867 to include in the automated testing, but these could be helpful when
1868 multiple configurations are in use.
1870 2. The exinext utility was not formatting the output nicely when there was
1871 an alternate port involved in the retry record key, nor when there was a
1872 message id as well (for retries that were specific to a specific message
1873 and a specific host). It was also confused by IPv6 addresses, because of
1874 the additional colons they contain. I have fixed the IPv4 problem, and
1875 patched it up to do a reasonable job for IPv6.
1877 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1878 delivery, the log line now contains "pipelined" if PIPELINING was used.
1880 4. An SMTP transport process used to panic and die if the bind() call to set
1881 an explicit outgoing interface failed. This has been changed; it is now
1882 treated in the same way as a connect() failure.
1884 5. A reference to $sender_host_name in the part of a conditional expansion
1885 that was being skipped was still causing a DNS lookup. This no longer
1888 6. The def: expansion condition was not recognizing references to header lines
1889 that used bh_ and bheader_.
1891 7. Added the _cache feature to named lists.
1893 8. The code for checking quota_filecount in the appendfile transport was
1894 allowing one more file than it should have been.
1896 9. For compatibility with Sendmail, the command line option
1904 and sets the incoming protocol and host name (for trusted callers). The
1905 host name and its colon can be omitted when only the protocol is to be set.
1906 Note the Exim already has two private options, -pd and -ps, that refer to
1907 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1908 "s", but I don't think that's a major issue.
1910 10. A number of refactoring changes to the code, none of which should affect
1913 (a) The number of logging options was getting close to filling up the
1914 32-bit word that was used as a bit map. I have split them into two classes:
1915 those that are passed in the argument to log_write(), and those that are
1916 only ever tested independently outside of that function. These are now in
1917 separate 32-bit words, so there is plenty of room for expansion again.
1918 There is no change in the user interface or the logging behaviour.
1920 (b) When building, for example, log lines, the code previously used a
1921 macro that called string_cat() twice, in order to add two strings. This is
1922 not really sufficiently general. Furthermore, there was one instance where
1923 it was actually wrong because one of the argument was used twice, and in
1924 one call a function was used. (As it happened, calling the function twice
1925 did not affect the overall behaviour.) The macro has been replaced by a
1926 function that can join an arbitrary number of extra strings onto a growing
1929 (c) The code for expansion conditions now uses a table and a binary chop
1930 instead of a serial search (which was left over from when there were very
1931 few conditions). Also, it now recognizes conditions like "pam" even when
1932 the relevant support is not compiled in: a suitably worded error message is
1933 given if an attempt is made to use such a condition.
1935 11. Added ${time_interval:xxxxx}.
1937 12. A bug was causing one of the ddress fields not to be passed back correctly
1938 from remote delivery subprocesses. The field in question was not being
1939 subsequently used, so this caused to problems in practice.
1941 13. Added new log selectors queue_time and deliver_time.
1943 14. Might have fixed a bug in maildirsizefile handling that threw up
1944 "unexpected character" debug warnings, and recalculated the data
1945 unnecessarily. In any case, I expanded the warning message to give more
1948 15. Added the message "Restricted characters in address" to the statements in
1949 the default ACL that block characters like @ and % in local parts.
1951 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
1952 Three changes have been made:
1954 (a) There was a serious bug; a negative response to MAIL caused the whole
1955 recipient domain to be cached as invalid, thereby blocking all messages
1956 to all local parts at the same domain, from all senders. This bug has
1957 been fixed. The domain is no longer cached after a negative response to
1958 MAIL if the sender used is not empty.
1960 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1963 (c) A new callout option, "use_sender" has been added for people who want
1964 the modified behaviour.
1970 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1973 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1974 indeed breaks things for older releases.
1976 3. Added additional logging to the case where there is a problem reading data
1977 from a filter that is running in a subprocess using a pipe, in order to
1978 try to track down a specific problem.
1980 4. Testing facility fudge: when running in the test harness and attempting
1981 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1982 getting "No route to host". Convert this to a timeout.
1984 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1987 6. Some OS don't have socklen_t but use size_t instead. This affects the
1988 fifth argument of getsockopt() amongst other things. This is now
1989 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1990 can be set for individual OS. I have set it for SunOS5, OSF1, and
1991 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1992 some earlier ones do not.
1994 7. Change 4.30/15 was not doing the test caselessly.
1996 8. The standard form for an IPv6 address literal was being rejected by address
1997 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1998 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1999 this, as well as the form without the "IPv6" on the front (but only when
2000 address literals are enabled, of course).
2002 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2004 10. Exim crashed if a message with an empty sender address specified by -f
2005 encountered a router with an errors_to setting. This could be provoked only
2006 by a command such as
2010 where an empty string was supplied; "<>" did not hit this bug.
2012 11. Installed PCRE release 4.5.
2014 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2015 remained set. It is now erased.
2017 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2018 times from message ids (which are base 36 rather than the normal 62).
2020 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2021 were being counted as actual protocol errors, and logged if the log
2022 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2023 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2024 and DATA following a set of rejected RCPTs do not count as protocol errors.
2025 In other words, Exim assumes they were pipelined, though this may not
2026 actually be the case. Of course, in all cases the client gets an
2027 appropriate error code.
2029 15. If a lookup fails in an ACL condition, a message about the failure may
2030 be available; it is used if testing the ACL cannot continue, because most
2031 such messages specify what the cause of the deferral is. However, some
2032 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2033 that caused an old message to be retained and used if a later statement
2034 caused a defer, replacing the real cause of the deferral.
2036 16. If an IP address had so many PTR records that the DNS lookup buffer
2037 was not large enough to hold them, Exim could crash while trying to process
2038 the truncated data. It now detects and logs this case.
2040 17. Further to 4.21/58, another change has been made: if (and only if) the
2041 first line of a message (the first header line) ends with CRLF, a bare LF
2042 in a subsequent header line has a space inserted after it, so as not to
2043 terminate the header.
2045 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2046 unnecessarily, used atoi() instead of strtol(), and didn't check the
2047 termination when getting file sizes from file names by regex.
2049 19. Completely re-implemented the support for maildirsize files, in the light
2050 of a number of problems with the previous contributed implementation
2051 (4.30/29). In particular:
2053 . If the quota is zero, the maildirsize file is maintained, but no quota is
2056 . If the maildir directory does not exist, it is created before any attempt
2057 to write a maildirsize file.
2059 . The quota value in the file is just a cache; if the quota is changed in
2060 the transport, the new value overrides.
2062 . A regular expression is available for excluding directories from the
2065 20. The autoreply transport checks the characters in options that define the
2066 message's headers; it allows continued headers, but it was checking with
2067 isspace() after an embedded newline instead of explicitly looking for a
2070 21. If all the "regular" hosts to which an address was routed had passed their
2071 expiry times, and had not reached their retry times, the address was
2072 bounced, even if fallback hosts were defined. Now Exim should go on to try
2075 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2076 equivalent code in the SMTP transport. Some hosts send humungous responses
2077 to HELO/EHLO, more than 1024 it seems.
2079 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2080 gives compiler warnings in some environments. I've now done it "properly",
2083 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2084 (because of problems with the built-in one) was declared to return uschar *
2085 instead of char *, causing compiler failure.
2087 25. Fixed a file descriptor leak when processing alias/forward files.
2089 26. Fixed a minor format string issue in dbfn.c.
2091 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2093 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2094 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2097 29. When a sender address is verified, it is cached, to save repeating the test
2098 when there is more than one recipient in a message. However, when the
2099 verification involves a callout, it is possible for different callout
2100 options to be set for different recipients. It is too complicated to keep
2101 track of this in the cache, so now Exim always runs a verification when a
2102 callout is required, relying on the callout cache for the optimization.
2103 The overhead is duplication of the address routing, but this should not be
2106 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2107 to be verified with callout=postmaster, and the main callout worked but the
2108 postmaster check failed, the verification correctly failed. However, if a
2109 subsequent RCPT command asked for sender verification *without* the
2110 postmaster check, incorrect caching caused this verification also to fail,
2113 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2114 it was not caching the DNS options (qualify_single, search_parents) that
2115 were used when the lookup failed. A subsequent lookup with different
2116 options therefore always gave the same answer, though there were cases
2117 where it should not have. (Example: a "domains = !$mx_any" option on a
2118 dnslookup router: the "domains" option is always processed without any
2119 widening, but the router might have qualify_single set.) Now Exim uses the
2120 cached value only when the same options are set.
2122 32. Added John Jetmore's "exipick" utility to the distribution.
2124 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2125 than a timeout (e.g. a certificate is required, and is not provided), an
2126 Exim server now closes the connection immediately. Previously it waited for
2127 the client to close - but if the client is SSL, it seems that they each
2128 wait for each other, leading to a delay before one of them times out.
2130 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2131 maintained 0.8.x compatibility because I don't think many are using it, and
2132 it is clearly obsolete.
2134 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2137 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2138 client certificate was expired. A simple patch fixes this, though I don't
2139 understand the full logic of why the verify callback is called multiple
2142 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2143 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2144 which causes problems with some clients (such as the Certicom SSL Plus
2145 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2146 disables the coutermeasure allowing Eudora to connect."
2148 38. Exim was not checking that a write() to a log file succeeded. This could
2149 lead to Bad Things if a log got too big, in particular if it hit a file
2150 size limit. Exim now panics and dies if it cannot write to a log file, just
2151 as it does if it cannot open a log file.
2153 39. Modified OS/Makefile-Linux so that it now contains
2155 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2157 The two -D definitions ensure that Exim is compiled with large file
2158 support, which makes it possible to handle log files that are bigger than
2161 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2162 instance) a domain was checked against a named list that involved a lookup,
2163 causing $domain_data to be set, then another domain was checked against the
2164 same list, then the first domain was re-checked, the value of $domain_data
2165 after the final check could be wrong. In particular, if the second check
2166 failed, it could be set empty. This bug probably also applied to
2169 41. The strip_trailing_dot option was not being applied to the address given
2170 with the -f command-line option.
2172 42. The code for reading a message's header from the spool was incrementing
2173 $received_count, but never initializing it. This meant that the value was
2174 incorrect (doubled) while delivering a message in the same process in which
2175 it was received. In the most common configuration of Exim, this never
2176 happens - a fresh exec is done - but it can happen when
2177 deliver_drop_privilege is set.
2179 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2180 it now includes up to 150 characters of the unexpected data in the log
2183 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2184 and building data strings. The size of both of these buffers was 10 000
2185 bytes - far larger than anybody would *ever* want, thought I. Needless to
2186 say, somebody hit the limit. I have increased the maximum line length to
2187 20 000 and the maximum data length of concatenated lines to 100 000. I have
2188 also fixed two bugs, because there was no checking on these buffers. Tsk,
2189 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2190 buffer is too small.
2192 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2193 lsearch lookups. Now it does.
2195 46. When parsing a route_list item in a manualroute router, a fixed-length
2196 buffer was used for the list of hosts. I made this 1024 bytes long,
2197 thinking that nobody would ever have a list of hosts that long. Wrong.
2198 Somebody had a whole pile of complicated expansion conditions, and the
2199 string was silently truncated, leading to an expansion error. It turns out
2200 that it is easier to change to an unlimited length (owing to other changes
2201 that have happened since this code was originally written) than to build
2202 structure for giving a limitation error. The length of the item that
2203 expands into the list of hosts is now unlimited.
2205 47. The lsearch lookup could not handle data where the length of text line was
2206 more than 4095 characters. Such lines were truncated, leading to shortened
2207 data being returned. It should now handle lines of any length.
2209 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2210 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2213 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2214 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2215 no longer happens in comment lines. A list of replacements is now placed
2216 at the head of all of the source files, except those whose only change is
2217 to replace PERL_COMMAND in the very first #! line.
2219 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2220 messages on the queue, with a bottom-up merge sort, using code contributed
2221 by Michael Haardt. This should make operations like -bp somewhat faster on
2222 large queues. It won't affect queue runners, except when queue_run_in_order
2225 51. Installed eximstats 1.31 in the distribution.
2227 52. Added support for SRV lookups to the dnslookup router.
2229 53. If an ACL referred to $message_body or $message_body_end, the value was not
2230 reset for any messages that followed in the same SMTP session.
2232 54. The store-handling optimization for building very long strings was not
2233 differentiating between the different store pools. I don't think this
2234 actually made any difference in practice, but I've tidied it.
2236 55. While running the routers to verify a sender address, $sender_address
2237 was still set to the sender address. This is wrong, because when routing to
2238 send a bounce to the sender, it would be empty. Therefore, I have changed
2239 it so that, while verifying a sender address, $sender_address is set to <>.
2240 (There is no change to what happens when verifying a recipient address.)
2242 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2243 target A or AAAA records (if not already returned) without resetting the
2244 qualify_single or search_parents options of the DNS resolver. These are
2245 inappropriate in this case because the targets of MX and SRV records must
2246 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2247 target that, when qualified, matched something in the local domain. These
2248 two options are now turned off when doing these lookups.
2250 57. It seems that at least some releases of Reiserfs (which does not have the
2251 concept of a fixed number of inodes) returns zero and not -1 for the
2252 number of available inodes. This interacted badly with check_spool_inodes,
2253 which assumed that -1 was the "no such thing" setting. What I have done is
2254 to check that the total number of inodes is greater than zero before doing
2255 the test of how many are available.
2257 58. When a "warn" ACL statement has a log_message modifier, the message is
2258 remembered, and not repeated. This is to avoid a lot of repetition when a
2259 message has many recipients that cause the same warning to be written.
2260 Howewer, Exim was preserving the list of already written lines for an
2261 entire SMTP session, which doesn't seem right. The memory is now reset if a
2262 new message is started.
2264 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2265 debugging output unless log_rewrite was also set.
2267 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2268 of (int)(handle) when we know that handle contains (void *)(-1).
2270 61. The Exim daemon panic-logs an error return when it closes the incoming
2271 connection. However "connection reset by peer" seems to be common, and
2272 isn't really an error worthy of noting specially, so that particular error
2275 62. When Exim is trying to find all the local interfaces, it used to panic and
2276 die if the ioctl to get the interface flags failed. However, it seems that
2277 on at least one OS (Solaris 9) it is possible to have an interface that is
2278 included in the list of interfaces, but for which you get a failure error
2279 for this call. This happens when the interface is not "plumbed" into a
2280 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2281 failure of the "get flags" call assumes that the interface is down.
2283 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2284 makes life easier for people who are doing arithmetic on fields extracted
2285 from dates, where you often get leading zeros that should not be
2286 interpreted as octal.
2288 64. Added qualify_domain to the redirect router, to override the global
2291 65. If a pathologically long header line contained very many addresses (the
2292 report of this problem mentioned 10 000) and each of them was rewritten,
2293 Exim could use up a very large amount of memory. (It kept on making new
2294 copies of the header line as it rewrote, and never released the old ones.)
2295 At the expense of a bit more processing, the header rewriting function has
2296 been changed so that it no longer eats memory in this way.
2298 66. The generation of the Received: header has been moved from the time that a
2299 message starts to be received, to the time that it finishes. The timestamp
2300 in the Received: header should now be very close to that of the <= log
2301 line. There are two side-effects of this change:
2303 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2304 logged header lines no longer include the local Received: line, because
2305 it has not yet been created. The same applies to a copy of the message
2306 that is returned to a non-SMTP sender when a message is rejected.
2308 (b) When a filter file is tested using -bf, no additional Received: header
2309 is added to the test message. After some thought, I decided that this
2312 This change does not affect the value of $received_for. It is still set
2313 after address rewriting, but before local_scan() is called.
2315 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2317 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2318 gave an unhelpful panic error message, and a defer error. I have managed to
2319 change this behaviour so that it now rejects any supplied certificate,
2320 which seems right, as the list of acceptable certificates is empty.
2322 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2323 gave an unhelpful defer error. I have not managed to make this reject any
2324 supplied certificates, but the error message it gives is "no certificate
2325 supplied", which is not helpful.
2327 70. exigrep's output now also includes lines that are not associated with any
2328 message, but which match the given pattern. Implemented by a patch from
2329 Martin Sluka, which also tidied up the Perl a bit.
2331 71. Recipient callout verification, like sender verification, was using <> in
2332 the MAIL FROM command. This isn't really the right thing, since the actual
2333 sender may affect whether the remote host accepts the recipient or not. I
2334 have changed it to use the actual sender in the callout; this means that
2335 the cache record is now keyed on a recipient/sender pair, not just the
2336 recipient address. There doesn't seem to be a real danger of callout loops,
2337 since a callout by the remote host to check the sender would use <>.
2338 [SEE ABOVE: changed after hitting problems.]
2340 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2341 temporary errors. However, in the case of such a code being given after
2342 the end of a data transmission (i.e. after ".") Exim was failing to write
2343 a retry record for the message. (Yes, there was some broken host that was
2344 actually sending 8xx at this point.)
2346 73. An unknown lookup type in a host list could cause Exim to panic-die when
2347 the list was checked. (An example that provoked this was putting <; in the
2348 middle of a list instead of at the start.) If this happened during a DATA
2349 ACL check, a -D file could be left lying around. This kind of configuration
2350 error no longer causes Exim to die; instead it causes a defer errror. The
2351 incident is still logged to the main and panic logs.
2353 74. Buglet left over from Exim 3 conversion. The message "too many messages
2354 in one connection" was written to the rejectlog but not the mainlog, except
2355 when address rewriting (yes!) was being logged.
2357 75. Added write_rejectlog option.
2359 76. When a system filter was run not as root (that is, when system_filter_user
2360 was set), the values of the $n variables were not being returned to the
2361 main process; thus, they were not subsequently available in the $sn
2364 77. Added +return_path_on_delivery log selector.
2366 78. A connection timeout was being treated differently from recipients deferred
2367 when testing hosts_max_try with a message that was older than the host's
2368 retry timeout. (The host should not be counted, thus allowing all hosts to
2369 be tried at least once before bouncing.) This may have been the cause of an
2370 occasionally reported bug whereby a message would remain on the queue
2371 longer than the retry timeout, but would be bounced if a delivery was
2372 forced. I say "may" because I never totally pinned down the problem;
2373 setting up timeout/retry tests is difficult. See also the next item.
2375 79. The ultimate address timeout was not being applied to errors that involved
2376 a combination of host plus message (for example, a timeout on a MAIL
2377 command). When an address resolved to a number of possible hosts, and they
2378 were not all tried for each delivery (e.g. because of hosts_max_try), a
2379 message could remain on the queue longer than the retry timeout.
2381 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2384 81. Fixed an obscure SMTP outgoing bug which required at least the following
2385 conditions: (a) there was another message waiting for the same server;
2386 (b) the server returned 5xx to all RCPT commands in the first message so
2387 that the message was not completed; (c) the server dropped the connection
2388 or gave a negative response to the RSET that Exim sends to abort the
2389 transaction. The observed case was a dropped connection after DATA that had
2390 been sent in pipelining mode. That is, the server had advertised PIPELINING
2391 but was not implementing it correctly. The effect of the bug was incorrect
2392 behaviour, such as trying another host, and this could lead to a crash.
2398 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2399 and daemon.c were passed as pointers to ints; they should have been
2400 pointers to socklen_t variables (which are typically unsigned ints).
2402 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2405 3. Fixed a really odd bug that affected only the testing scheme; patching a
2406 certain fixed string in the binary changed the value of another string that
2407 happened to be identical to the end of the original first string.
2409 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2410 name", it returns that address as the IP address. On some operating
2411 systems (e.g. Solaris), it also passes back the IP address string as the
2412 "host name". However, on others (e.g. Linux), it passes back an empty
2413 string. Exim wasn't checking for this, and was changing the host name to an
2414 empty string, assuming it had been canonicized.
2416 5. Although rare, it is permitted to have more than one PTR record for a given
2417 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2418 all the names associated with an address, because they do in Solaris.
2419 However, it seems that they do not in Linux for data that comes from the
2420 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2421 I found this out when I moved to a new Linux workstation and tried to run
2422 the Exim test suite.
2424 To get round this problem I have changed the code so that it now does its
2425 own call to the DNS to look up PTR records when searching for a host name.
2426 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2427 addresses that are only in /etc/hosts are still found.
2429 This behaviour is, however, controlled by an option called host_lookup_
2430 order, which defaults to "bydns:byaddr". If people want to use the other
2431 order, or indeed, just use one or the other means of lookup, they can
2432 specify it in this variable.
2434 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2435 some operating systems, this comes back from gethostbyaddr() as an empty
2436 string, and this is what Exim used to test for. However, it seems that in
2437 other systems, "." is yielded. Exim now tests for this case too.
2439 7. The values of check_spool_space and check_log_space are now held internally
2440 as a number of kilobytes instead of an absolute number of bytes. If a
2441 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2442 kilobyte. This means that much larger values can be stored.
2444 8. Exim monitor: an attempt to get the action menu when not actually pointing
2445 at a message produces an empty menu entitled "No message selected". This
2446 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2447 no entries in it ("Shell widget menu has zero width and/or height"). So I
2448 have added a single, blank menu entry in this case.
2450 9. Added ${quote_local_part.
2452 10. MIME decoding is now applied to the contents of Subject: header lines when
2455 11. Now that a reference to $sender_host_address automatically causes a reverse
2456 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2457 host lookup before query-style lookups in lists that might use this
2458 variable. This has therefore been abolished, and the "net-" prefix is no
2459 longer necessary for query-style lookups.
2461 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2462 have been a typo for LFLAGS, so it has been changed.
2464 13. The install script calls Exim with "-C /dev/null" in order to find the
2465 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2466 to be output. Howeve, since Exim outputs its version number before the
2467 error, it didn't break the script. It just looked ugly. I fixed this by
2468 always allowing "-C /dev/null" if the caller is root.
2470 14. Ignore overlarge ACL variable number when reading spool file - insurance
2471 against a later release with more variables having written the file.
2473 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2474 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2475 this, as well as the form without the "IPv6" on the front.
2477 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2478 OS/Makefile-Darwin file.
2480 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2481 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2483 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2484 variable. However, some OS use ints for inodes. I've added cast to long int
2485 to get rid of the compiler warning.
2487 19. I had forgotten to lock out "/../" in configuration file names when
2488 ALT_CONFIG_PREFIX was set.
2490 20. Routers used for verification do not need to specify transports. However,
2491 if such a router generated a host list, and callout was configured, Exim
2492 crashed, because it could not find a port number from the (non-existent)
2493 transport. It now assumes port 25 in this circumstance.
2495 21. Added the -t option to exigrep.
2497 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2498 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2499 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2500 them is set, LOOKUP_LSEARCH is forced.
2502 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2504 24. Added sender and host information to the "rejected by local_scan()" log
2505 line; previously there was no indication of these.
2507 25. Added .include_if_exists.
2509 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2510 Linux. It turns out that not all file systems support this. Apparently some
2511 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2512 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2513 not supported on the file descriptor, is now ignored when Exim is trying to
2514 sync a directory. This applies only to Linux.
2516 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2518 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2519 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2522 29. Added support for maildirsize files from supplied patch (modified a bit).
2524 30. The use of :fail: followed by an empty string could lead Exim to respond to
2525 sender verification failures with (e.g.):
2527 550 Verification failed for <xxx>
2528 550 Sender verify failed
2530 where the first response line was missing the '-' that indicates it is not
2531 the final line of the response.
2533 31. The loop for finding the name of the user that called Exim had a hardwired
2534 limit of 10; it now uses the value of finduser_retries, which is used for
2535 all other user lookups.
2537 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2540 33. Exim was neglecting to zero errno before one call of strtol() when
2541 expanding a string and expecting an integer value. On some systems this
2542 resulted in spurious "integer overflow" errors. Also, it was casting the
2543 result into an int without checking.
2545 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2546 did not work. The code looks as if it has *never* worked, though it appears
2547 to have been documented since at least releast 1.62. I have made it work.
2549 35. The "timeout_DNS" error in retry rules, also documented since at least
2550 1.62, also never worked. As it isn't clear exactly what this means, and
2551 clearly it isn't a major issue, I have abolished the feature by treating it
2552 as "timeout", and writing a warning to the main and panic logs.
2554 36. The display of retry rules for -brt wasn't always showing the error code
2557 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2558 timeout_connect_A, timeout_connect_MX.
2560 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2561 to the empty sender.
2563 39. The daemon was not analysing the content of -oX till after it had closed
2564 stderr and disconnected from the controlling terminal. This meant that any
2565 syntax errors were only noted on the panic log, and the return code from
2566 the command was 0. By re-arranging the code a little, I've made the
2567 decoding happen first, so such errors now appear on stderr, and the return
2568 code is 1. However, the actual setting up of the sockets still happens in
2569 the disconnected process, so errors there are still only recorded on the
2572 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2573 connections (as happens on some IP stacks) was logged at start up time as
2574 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2575 it from "IPv6 and IPv4", which means that two separate sockets are being
2578 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2579 says whether AF_INET or AF_INET6 was passed as an argument.
2581 42. Exiwhat output was messed up when time zones were included in log
2584 43. Exiwhat now gives more information about the daemon's listening ports,
2585 and whether -tls-on-connect was used.
2587 44. The "port" option of the smtp transport is now expanded.
2589 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2590 silently ignored. Now an error message is written to the main and panic
2593 46. There's a new ACL modifier called "logwrite" which writes to a log file
2594 as soon as it is encountered.
2596 47. Added $local_user_uid and $local_user_gid at routing time.
2598 48. Exim crashed when trying to verify a sender address that was being
2601 49. Exim was recognizing only a space character after ".include". It now also
2602 recognizes a tab character.
2604 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2605 extracting the relevant information from the specification. The man page no
2606 longer contains scrambled data for the -d option, and I've added a section
2607 at the front about calling Exim under different names.
2609 51. Added "extra_headers" argument to the "mail" command in filter files.
2611 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2614 53. Installed eximstats 1.29.
2616 54. Added transport_filter_timeout as a generic transport option.
2618 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2619 Cc: header lines. This was required by RFC 822, but it not required by RFC
2622 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2623 incoming messages that did not have them. Now it does so only if the
2624 message originates locally, that is, if there is no associated remote host
2625 address. When Resent- header lines are present, this applies to the Resent-
2626 lines rather than the non-Resent- lines.
2628 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2629 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2631 58. Messages for configuration errors now include the name of the main
2632 configuration file - useful now that there may be more than one file in a
2633 list (.included file names were always shown).
2635 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2636 for those rare installations that do not start the daemon as root or run it
2637 setuid root. I've cut out the call to initgroups() if the daemon is not
2640 60. The Exim user and group can now be bound into the binary as text strings
2641 that are looked up at the start of Exim's processing.
2643 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2645 62. Added $mailstore_basename variable.
2647 63. Installed patch to sieve.c from Michael Haardt.
2649 64. When Exim failed to open the panic log after failing to open the main log,
2650 the original message it was trying to log was written to stderr and debug
2651 output, but if they were not available (the usual case in production), it
2652 was lost. Now it is written to syslog before the two lines that record the
2653 failures to open the logs.
2655 65. Users' Exim filters run in subprocesses under the user's uid. It is
2656 possible for a "deliver" command or an alias in a "personal" command to
2657 provoke an address rewrite. If logging of address rewriting is configured,
2658 this fails because the process is not running as root or exim. There may be
2659 a better way of dealing with this, but for the moment (because 4.30 needs
2660 to be released), I have disabled address rewrite logging when running a
2661 filter in a non-root, non-exim process.
2667 1. The buildconfig auxiliary program wasn't quoting the value set for
2668 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2669 not defined. This bug was masked in 4.22 by the effect that was fixed in
2672 2. Some messages that were rejected after a message id was allocated were
2673 shown as "incomplete" by exigrep. It no longer does this for messages that
2674 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2676 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2677 have allow_domain_literals set, the ID did not get logged in the <= line.
2678 Domain literals are now always recognized in Message-ID: header lines.
2680 4. The first argument for a ${extract expansion item is the key name or field
2681 number. Leading and trailing spaces in this item were not being ignored,
2682 causing some misleading effects.
2684 5. When deliver_drop_privilege was set, single queue runner processes started
2685 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2686 same command in the process it spins off) were not dropping privilege.
2688 6. When the daemon running as "exim" started a queue runner, it always
2689 re-executed Exim in the spun-off process. This is a waste of effort when
2690 deliver_drop_privilege is set. The new process now just calls the
2691 queue-runner function directly.
2697 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2700 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2701 ignored. Though the use of -oP was forcing the writing of a pid file, it
2702 was always written to the default place.
2704 3. If the message "no IP address found for host xxxx" is generated during
2705 incoming verification, it is now followed by identification of the incoming
2706 connection (so you can more easily find what provoked it).
2708 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2710 5. Added some features to "harden" Exim a bit more against certain attacks:
2712 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2713 be put in Local/Makefile. This is like the never_users runtime option,
2714 but it cannot be overridden. The default setting is "root".
2716 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2717 prefix string with which any file named in a -C command line option
2720 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2721 is retained for -C and -D only if the caller of Exim is root. Without
2722 it, the exim user may also use -C and -D and retain privilege.
2724 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2725 command line option is disabled.
2727 6. Macro names set by the -D option must start with an upper case letter, just
2728 like macro names defined in the configuration file.
2730 7. Added "dereference=" facility to LDAP.
2732 8. Two instances of the typo "uknown" in the source files are fixed.
2734 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2735 the Configure-Makefile script screwed up while processing it.
2737 10. Incorporated PCRE 4.4.
2739 11. The SMTP synchronization check was not operating right at the start of an
2740 SMTP session. For example, it could not catch a HELO sent before the client
2741 waited for the greeting. There is now a check for outstanding input at the
2742 point when the greeting is written. Because of the duplex, asynchronous
2743 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2744 way, but not yet received, when the check is performed.
2746 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2747 on TCP/IP sockets, because this apparently causes some broken clients to
2750 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2751 unchanged) from the Cygwin maintainer.
2753 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2754 was supported instead of testing for mbx. Effectively a typo.
2756 15. The spa authenticator server code was not checking that the input it
2757 received was valid base64.
2759 16. The debug output line for the "set" modifier in ACLs was not showing the
2760 name of the variable that was being set.
2762 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2764 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2765 lookup on its own. Something else was needed to trigger the lookup. For
2766 example, a match in host_lookup or the need for a host name in a host list.
2767 Now, if $sender_host_name is referenced and the host name has not yet been
2768 looked up, a lookup is performed. If the lookup fails, the variable remains
2769 empty, and $host_lookup_failed is set to "1".
2771 19. Added "eqi" as a case-independent comparison operator.
2773 20. The saslauthd authentication condition could segfault if neither service
2774 nor realm was specified.
2776 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2777 error message that was logged was misleading, and incoming SMTP
2778 connections were dropped. The message is now more accurate, and temporary
2779 errors are given to SMTP connections.
2781 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2782 (except RSET) with a 421 error, until QUIT is received. However, it was
2783 failing to send a response to QUIT.
2785 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2786 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2787 ACL is now run after the helo_try_verify_hosts code.
2789 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2790 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2791 case-independent, so other case variants are also recognized). Apparently
2792 some systems use these upper case variants.
2794 25. If more than two messages were waiting for the same host, and a transport
2795 filter was specified for the transport, Exim sent two messages over the
2796 same TCP/IP connection, and then failed with "socket operation on non-
2797 socket" when it tried to send the third.
2799 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2801 27. The extern definition of crypt16() in expand.c was not being excluded when
2802 the OS had its own crypt16() function.
2804 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2805 as a preferred synonym for return_size_limit, both as an option and as an
2808 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2810 30. Changed the default configuration ACL to relax the local part checking rule
2811 for addresses that are not in any local domains. For these addresses,
2812 slashes and pipe symbols are allowed within local parts, but the sequence
2813 /../ is explicitly forbidden.
2815 31. SPA server authentication was not clearing the challenge buffer before
2818 32. log_message in a "warn" ACL statement was writing to the reject log as
2819 well as to the main log, which contradicts the documentation and doesn't
2820 seem right (because no rejection is happening). So I have stopped it.
2822 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2823 However, I am unable to do any testing of this.
2825 34. Fixed an infelicity in the appendfile transport. When checking directories
2826 for a mailbox, to see if any needed to be created, it was accidentally
2827 using path names with one or more superfluous leading slashes; tracing
2828 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2830 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2831 contents are added to the log line that is written for every discarded
2832 recipient. (Previously a log_message setting was ignored.)
2834 36. The ${quote: operator now quotes the string if it is empty.
2836 37. The install script runs exim in order to find its version number. If for
2837 some reason other than non-existence or emptiness, which it checks, it
2838 could not run './exim', it was installing it with an empty version number,
2839 i.e. as "exim-". This error state is now caught, and the installation is
2842 38. An argument was missing from the function that creates an error message
2843 when Exim fails to connect to the socket for saslauthd authentication.
2844 This could cause Exim to crash, or give a corrupted message.
2846 39. Added isip, isip4, and isip6 to ${if conditions.
2848 40. The ACL variables $acl_xx are now saved with the message, and can be
2849 accessed later in routers, transports, and filters.
2851 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2852 strings in the file are not string-expanded.
2854 42. If a MAIL command specified a SIZE value that was too large to fit into an
2855 int variable, the check against message_size_limit failed. Such values are
2856 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2857 day this will have to be increased, but I don't think I want to be around
2858 when emails are that large.
2865 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2866 iconv() is not standard in FreeBSD.
2868 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2869 IPv6 enabled. The observed symptom was a segmentation fault on return from
2870 the function os_common_find_running_interfaces() in src/os.c.
2872 3. In the check_special_case() function in daemon.c I had used "errno" as an
2873 argument name, which causes warnings on some systems. This was basically a
2874 typo, since it was named "eno" in the comments!
2876 4. The code that waits for the clock to tick (at a resolution of some fraction
2877 of a second) so as to ensure message-id uniqueness was always waiting for
2878 at least one whole tick, when it could have waited for less. [This is
2879 almost certainly not relevant at current processor speeds, where it is
2880 unlikely to ever wait at all. But we try to future-proof.]
2882 5. The function that sleeps for a time interval that includes fractions of a
2883 second contained a race. It did not block SIGALRM between setting the
2884 timer, and suspending (a couple of lines later). If the interval was short
2885 and the sigsuspend() was delayed until after it had expired, the suspension
2886 never ended. On busy systems this could lead to processes getting stuck for
2889 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2890 process, before it forks any delivery processes. The open lookup caching
2891 mechanism meant that the open file or database connection was passed into
2892 the delivery process. The problem was that delivery processes always tidy
2893 up cached lookup data. This could cause a problem for the next delivery
2894 process started by the queue runner, because the external queue runner
2895 process does not know about the closure. So the next delivery process
2896 still has data in the lookup cache. In the case of a file lookup, there was
2897 no problem because closing a file descriptor in a subprocess doesn't affect
2898 the parent. However, if the lookup was caching a connection to a database,
2899 the connection was closed, and the second delivery process was likely to
2900 see errors such as "PGSQL: query failed: server closed the connection
2901 unexpectedly". The problem has been fixed by closing all cached lookups
2902 in a queue runner before running a delivery process.
2904 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2905 seem to have the "const" qualifier which it has on other OS. I've
2908 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2909 *of the same type* (client or server) with the same public name that an
2910 error should be diagnosed.
2912 9. When Exim looked up a host name for an IP address, but failed to find the
2913 original IP address when looking up the host name (a safety check), it
2914 output the message "<ip address> does not match any IP for NULL", which was
2915 confusing, to say the least. The bug was that the host name should have
2916 appeared instead of "NULL".
2918 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
2919 user that is built into the binary, and the -C or -D options is used, root
2920 privilege is dropped before the configuration file is read. In addition,
2921 logging is switched to stderr instead of the normal log files. If the
2922 configuration then re-defines the Exim user, the unprivileged environment
2923 is probably not what is expected, so Exim logs a panic warning message (but
2926 However, if deliver_drop_privilege is set, the unprivileged state may well
2927 be exactly what is intended, so the warning has been cut out in that case,
2928 and Exim is allowed to try to write to its normal log files.
2934 1. smtp_return_error_details was not giving details for temporary sender
2935 or receiver verification errors.
2937 2. Diagnose a configuration error if two authenticators have the same public
2940 3. Exim used not to create the message log file for a message until the first
2941 delivery attempt. This could be confusing when incoming messages were held
2942 for policy or load reasons. The message log file is now created at the time
2943 the message is received, and an initial "Received" line is written to it.
2945 4. The automatically generated man page for command line options had a minor
2946 bug that caused no ill effects; however, a more serious problem was that
2947 the procedure for building the man page automatically didn't always
2948 operate. Consequently, release 4.20 contains an out-of-date version. This
2949 shouldn't happen again.
2951 5. When building Exim with embedded Perl support, the script that builds the
2952 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2953 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2955 6. The freeze_tell option was not being used for messages that were frozen on
2956 arrival, either by an ACL or by local_scan().
2958 7. Added the smtp_incomplete_transaction log selector.
2960 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2961 was accepting AUTH without a new EHLO.
2963 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2964 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2967 10. Logging of TCP/IP connections (when configured) now happens in the main
2968 daemon process instead of the child process, so that the TCP/IP connection
2969 count is more accurate (but it can never be perfect).
2971 11. The use of "drop" in a nested ACL was not being handled correctly in the
2972 outer ACL. Now, if condition failure induced by the nested "drop" causes
2973 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2974 or "require"), the connection is dropped.
2976 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2977 that yield "discard" can now be used with an "accept" or a "discard" verb,
2978 but an error is generated for any others (because I can't see a useful way
2979 to define what should happen).
2981 13. When an ACL is read dynamically from a file (or anywhere else), the lines
2982 are now processed in the same way as lines in the Exim configuration file.
2983 In particular, continuation lines are supported.
2985 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2987 15. Added -ti meaning -t -i.
2989 16. Check for letters, digits, hyphens, and dots in the names of dnslist
2990 domains, and warn by logging if others are found.
2992 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
2993 returned from GIFCONF when Exim is trying to find the list of interfaces on
2994 a host. The code in os.c has been modified to copy each ifreq to an aligned
2995 structure in all cases.
2997 Also, in some cases, the returned ifreq's were being copied to a 'struct
2998 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2999 means the last couple of bytes of an IPv6 address could be chopped if the
3000 ifreq contained only a normal sockaddr (14 bytes storage).
3002 18. Named domain lists were not supported in the hosts_treat_as_local option.
3003 An entry such as +xxxx was not recognized, and was treated as a literal
3006 19. Ensure that header lines added by a DATA ACL are included in the reject log
3007 if the ACL subsequently rejects the message.
3009 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3010 MD5 (which is deprecated).
3012 21. When testing a filter file using -bf, Exim was writing a message when it
3013 took the sender from a "From " line in the message, but it was not doing so
3014 when it took $return_path from a Return-Path: header line. It now does.
3016 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3017 with a valid header line field name (a series of printing characters
3018 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3020 23. Changed "disc" in the source to "disk" to conform to the documentation and
3021 the book and for uniformity.
3023 24. Ignore Sendmail's -Ooption=value command line item.
3025 25. When execve() failed while trying to run a command in a pipe transport,
3026 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3027 could be confused with a return value of 69 from the command itself. This
3028 has been changed to 127, the value the shell returns if it is asked to run
3029 a non-existent command. The wording for the related log line suggests a
3030 non-existent command as the problem.
3032 26. If received_header_text expands to an empty string, do not add a Received:
3033 header line to the message. (Well, it adds a token one on the spool, but
3034 marks it "old" so that it doesn't get used or transmitted.)
3036 27. Installed eximstats 1.28 (addition of -nt option).
3038 28. There was no check for failure on the call to getsockname() in the daemon
3039 code. This can fail if there is a shortage of resources on the system, with
3040 ENOMEM, for example. A temporary error is now given on failure.
3042 29. Contrary to the C standard, it seems that in some environments, the
3043 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3044 program. Exim now does this explicitly; it affects the formatting of
3045 timestamps using strftime().
3047 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3048 complaints. I've now initialized all the variables, to avoid this.
3050 32. Header lines added by a system filter were not being "seen" during
3051 transport-time rewrites.
3053 33. The info_callback() function passed to OpenSSL is set up with type void
3054 (*)(SSL *, int, int), as described somewhere. However, when calling the
3055 function (actually a macro) that sets it up, the type void(*)() is
3056 expected. I've put in a cast to prevent warnings from picky compilers.
3058 34. If a DNS black list lookup found a CNAME record, but there were no A
3059 records associated with the domain it pointed at, Exim crashed.
3061 35. If a DNS black list lookup returned more than one A record, Exim ignored
3062 all but the first. It now scans all returned addresses if a particular IP
3063 value is being sought. In this situation, the contents of the
3064 $dnslist_value variable are a list of all the addresses, separated by a
3067 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3068 to accept a host name and all its aliases if the forward lookup for any of
3069 them yielded the IP address of the incoming connection. Now it accepts only
3070 those names whose forward lookup yields the correct IP address. Any other
3071 names are discarded. This closes a loophole whereby a rogue DNS
3072 administrator could create reverse DNS records to break through a
3073 wildcarded host restriction in an ACL.
3075 37. If a user filter or a system filter that ran in a subprocess used any of
3076 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3077 the wrong values were passed to the pipe command ($thisaddress had the
3078 value of $0, $0 had the value of $1, etc). This bug was introduced by
3079 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3081 38. Improved the line breaking for long SMTP error messages from ACLs.
3082 Previously, if there was no break point between 40 and 75 characters, Exim
3083 left the rest of the message alone. Two changes have been made: (a) I've
3084 reduced the minimum length to 35 characters; (b) if it can't find a break
3085 point between 35 and 75 characters, it looks ahead and uses the first one
3086 that it finds. This may give the occasional overlong line, but at least the
3087 remaining text gets split now.
3089 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3090 file descriptors might be low, and that setting 1000 would always raise it.
3091 It turns out that in some environments, the limit is already over 1000 and
3092 that lowering it causes trouble. So now Exim takes care not to decrease it.
3094 40. When delivering a message, the value of $return_path is set to $sender_
3095 address at the start of routing (routers may change the value). By an
3096 oversight, this default was not being set up when an address was tested by
3097 -bt or -bv, which affected the outcome if any router or filter referred to
3100 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3101 log only when "message" or "log_message" are set. However, if one of the
3102 conditions was an address verification, or a call to a nested ACL, the
3103 messages generated by the underlying test were being passed through. This
3104 no longer happens. The underlying message is available in $acl_verify_
3105 message for both "message" and "log_message" expansions, so it can be
3106 passed through if needed.
3108 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3109 new expansion $bh_ to give the encoded byte string without charset
3110 translation. Translation happens only if iconv() is available; HAVE_ICONV
3111 indicates this at build time. HEADERS_CHARSET gives the charset to
3112 translate to; headers_charset can change it in the configuration, and
3113 "headers charset" can change it in an individual filter file.
3115 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3116 that creates RFC 2047 encoded "words" labels them as that charset instead
3117 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3118 expansion operator; (ii) when Exim creates a From: line for a local
3119 message; (iii) when a header line is rewritten to include a "phrase" part.
3121 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3122 buggy, causing it to skip the first lines of messages whose message ID
3123 ended in 'D'. This would not have bitten before Exim release 4.14, because
3124 message IDs were unlikely to end in 'D' before then. The effect was to have
3125 incorrect size information for certain domains.
3127 45. #include "config.h" was missing at the start of the crypt16.c module. This
3128 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3131 46. If there was a timeout during a "random" callout check, Exim treated it as
3132 a failure of the random address, and carried on sending RSET and the real
3133 address. If the delay was just some slowness somewhere, the response to the
3134 original RCPT would be taken as a response to RSET and so on, causing
3135 mayhem of various kinds.
3137 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3138 when I implemented it. It didn't allow for the fact that some option values
3139 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3140 the right test for positive values.
3142 48. Domain names in DNS records are case-independent. Exim always looks them up
3143 in lower case. Some resolvers return domain names in exactly the case they
3144 appear in the zone file, that is, they may contain uppercase letters. Not
3145 all resolvers do this - some return always lower case. Exim was treating a
3146 change of case by a resolver as a change of domain, similar to a widening
3147 of a domain abbreviation. This triggered its re-routing code and so it was
3148 trying to route what was effectively the same domain again. This normally
3149 caused routing to fail (because the router wouldn't handle the domain
3150 twice). Now Exim checks for this case specially, and just changes the
3151 casing of the domain that it ultimately uses when it transmits the message
3154 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3157 50. If a filter generated a file delivery with a non-absolute name (possible if
3158 no home directory exists for the router), the forbid_file option was not
3161 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3162 the existing equality matching.
3164 52. Exim was using ints instead of ino_t variables in some places where it was
3165 dealing with inode numbers.
3167 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3168 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3169 called TMPDIR, and if it finds it is different, it changes its value.
3171 54. The smtp_printf() function is now made available to local_scan() so
3172 additional output lines can be written before returning. There is also an
3173 smtp_fflush() function to enable the detection of a dropped connection.
3174 The variables smtp_input and smtp_batched_input are exported to
3177 55. Changed the default runtime configuration: the message "Unknown user"
3178 has been removed from the ACL, and instead placed on the localuser router,
3179 using the cannot_route_message feature. This means that any verification
3180 failures that generate their own messages won't get overridden. Similarly,
3181 the "Unrouteable address" message that was in the ACL for unverifiable
3182 relay addresses has also been removed.
3184 56. Added hosts_avoid_esmtp to the smtp transport.
3186 57. The exicyclog script was not checking for the esoteric option
3187 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3188 will work only if exicyclog is run under the appropriate euid.
3190 58. Following a discussion on the list, the rules by which Exim recognises line
3191 endings on incoming messages have been changed. The -dropcr and drop_cr
3192 options are now no-ops, retained only for backwards compatibility. The
3193 following line terminators are recognized: LF CRLF CR. However, special
3194 processing applies to CR:
3196 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3197 nor a local message in the state where . is a terminator.
3199 (ii) If a bare CR is encountered in a header line, an extra space is added
3200 after the line terminator so as not to end the header. The reasoning
3201 behind this is that bare CRs in header lines are most likely either
3202 to be mistakes, or people trying to play silly games.
3204 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3205 was being incorrectly given as 18 bytes larger than it should have been.
3206 This is a VOB (very old bug).
3208 60. This may never have affected anything current, but just in case it has:
3209 When the local host is found other than at the start of a list of hosts,
3210 the local host, those with the same MX, and any that follow, are discarded.
3211 When the list in question was part of a longer list of hosts, the following
3212 hosts (not currently being processed) were also being discarded. This no
3213 longer happens. I'm not sure if this situation could ever has previously
3216 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3219 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3220 header. This is something that is recommended in a new Internet Draft, and
3221 is something that is documented as being done by Sendmail. There are two
3222 possible values. For messages generated by the autoreply transport, Exim
3225 Auto-Submitted: auto-replied
3227 whereas for all other generated messages (e.g. bounces) it adds
3229 Auto-Submitted: auto-generated
3231 63. The "personal" condition in filters now includes a test for the
3232 Auto-Submitted: header. If it contains the string "auto-" the message it
3233 not considered personal.
3235 64. Added rcpt_include_affixes as a generic transport option.
3237 65. Added queue_only_override (default true).
3239 66. Added the syslog_duplication option.
3241 67. If what should have been the first header line of a message consisted of
3242 a space followed by a colon, Exim was mis-interpreting it as a header line.
3243 It isn't of course - it is syntactically invalid and should therefore be
3244 treated as the start of the message body. The misbehaviour could have
3245 caused a number of strange effects, including loss of data in subsequent
3246 header lines, and spool format errors.
3248 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3249 client host had authenticated. This control can now be exercised by an ACL
3250 for more flexibility.
3252 69. By default, callouts do not happen when testing with -bh. There is now a
3253 variant, -bhc, which does actually run the callout code, including
3254 consulting and updating the callout cache.
3256 70. Added support for saslauthd authentication, courtesy of Alexander
3259 71. If statvfs() failed on the spool or log directories while checking their
3260 size for availability, Exim confusingly gave the error "space shortage".
3261 Furthermore, in debugging mode it crashed with a floating point exception.
3262 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3263 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3264 serious problem, Exim now writes to the main and panic logs when this
3265 happens, with details of the failure. It then refuses to accept the
3266 incoming message, giving the message "spool directory problem" or "log
3267 directory problem" with a 421 code for SMTP messages.
3269 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3270 0, 1, and 2 exist, because some OS complain for execs without them (see
3271 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3272 descriptors. However, the code omitted to check that the open succeeded,
3273 causing mysterious errors if for some reason the permissions on /dev/null
3274 got screwed. Now Exim writes a message to the main and panic logs, and
3275 bombs out if it can't open /dev/null.
3277 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3278 interact so that it is all more flexible. It is supposed to remain
3279 backwards compatible. Also added extra_local_interfaces.
3281 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3282 to bomb out with an assertion failure - to the client this appears as a
3283 connection drop. This problem occurs in the part of the code that was taken
3284 from the Samba project. Fortunately, the assertion is in a very simple
3285 function, so I have fixed this by reproducing the function inline in the
3286 one place where it is called, and arranging for authentication to fail
3287 instead of killing the process with assert().
3289 75. The SPA client code was not working when the server requested OEM rather
3290 than Unicode encoding.
3292 76. Added code to make require_files with a specific uid setting more usable in
3293 the case where statting the file as root fails - usually a non-root-mounted
3294 NFS file system. When this happens and the failure is EACCES, Exim now
3295 forks a subprocess and does the per-uid checking as the relevant uid.
3297 77. Added process_log_path.
3299 78. If log_file_path was not explicitly set, a setting of check_log_space or
3300 check_log_inodes was ignored.
3302 79. If a space check for the spool or log partitions fails, the incident is now
3303 logged. Of course, in the latter case the data may get lost...
3305 80. Added the %p formatting code to string_format() so that it can be used to
3306 print addresses in debug_print(). Adjusted all the address printing in the
3307 debugging in store.c to use %p rather than %d.
3309 81. There was a concern that a line of code in smtp_in.c could overflow a
3310 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3311 initially expressed, the concern was not well-founded, because trailing
3312 spaces are removed early. However, if the trailing spaces were followed by
3313 a NULL, they did not get removed, so the overflow was possible. Two fixes
3316 (a) I re-wrote the offending code in a cleaner fashion.
3317 (b) If an incoming SMTP command contains a NULL character, it is rejected
3320 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3321 runs initgroups(), so that if the Exim user is in any additional groups,
3322 they will be used during message reception.
3328 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob