1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.218 2005/09/12 10:08:53 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.
161 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
163 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
164 command itself ended in error, the underlying message about the transport
165 filter timeout was being overwritten with the pipe command error. Now the
166 underlying error message should be appended to the second error message.
168 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
170 PH/02 Reduce the amount of output that "make" produces by default. Full output
171 can still be requested.
173 PH/03 The warning log line about a condition test deferring for a "warn" verb
174 was being output only once per connection, rather than after each
175 occurrence (because it was using the same function as for successful
176 "warn" verbs). This seems wrong, so I have changed it.
178 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
179 it should not have, which might have caused a crash in the right
180 circumstances, but probably never did.
182 PH/04 Installed a modified version of Tony Finch's patch to make submission
183 mode fix the return path as well as the Sender: header line, and to
184 add a /name= option so that you can make the user's friendly name appear
187 TF/03 Added the control = fakedefer ACL modifier.
189 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
190 Mark Lowes for thorough testing.
192 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
194 TK/03 Merged latest SRS patch from Miles Wilton.
196 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
197 with the definition in sysexits.h (which is #included earlier).
198 Fortunately, Exim does not actually use EX_OK. The code used to try to
199 preserve the sysexits.h value, by assumimg that macro definitions were
200 scanned for macro replacements. I have been disabused of this notion,
201 so now the code just undefines EX_OK before #including unistd.h.
203 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
204 in the smtp transport. When a block could not be written in a single
205 write() function, the timeout was being re-applied to each part-write.
206 This seems wrong - if the receiver was accepting one byte at a time it
207 would take for ever. The timeout is now adjusted when this happens. It
208 doesn't have to be particularly precise.
210 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
211 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
213 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
214 without a domain if the check to <postmaster@domain> fails.
216 SC/01 Eximstats: added -xls and the ability to specify output files
217 (patch written by Frank Heydlauf).
219 SC/02 Eximstats: use FileHandles for outputing results.
221 SC/03 Eximstats: allow any combination of xls, txt, and html output.
223 SC/04 Eximstats: fixed display of large numbers with -nvr option
225 SC/05 Eximstats: fixed merging of reports with empty tables.
227 SC/06 Eximstats: added the -include_original_destination flag
229 SC/07 Eximstats: removed tabs and trailing whitespace.
231 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
233 TK/06 MBOX spool code: Add real "From " MBOX separator line
234 so the .eml file is really in mbox format (even though
235 most programs do not really care). Patch from Alex Miller.
237 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
238 The latter is generated from $received_to and is only set if the
239 message has one envelope recipient. SA can use these headers,
240 obviously out-of-the-box. Patch from Alex Miller.
242 PH/08 The ${def test on a variable was returning false if the variable's
243 value was "0", contrary to what the specification has always said!
244 The result should be true unless the variable is empty.
246 PH/09 The syntax error of a character other than { following "${if
247 def:variable_name" (after optional whitespace) was not being diagnosed.
248 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
249 accidental colon was present, for example, could give incorrect results.
251 PH/10 Tidied the code in a number of places where the st_size field of a stat()
252 result is used (not including appendfile, where other changes are about
255 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
256 This involved changing a lot of size variables from int to off_t. It
257 should work with maildirs and everything.
259 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
260 spamd dying while we are connected to it.
262 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
265 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
266 function for BDB 4.3.
268 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
270 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
271 the sources for PCRE have been re-arranged and more files are now
274 PH/15 The code I had for printing potentially long long variables in PH/11
275 above was not the best (it lost precision). The length of off_t variables
276 is now inspected at build time, and an appropriate printing format (%ld
277 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
278 to be "long long int" or "long int". This is needed for the internal
279 formatting function string_vformat().
281 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
282 the configuration file to be ":syslog", then the script "guesses" where
283 the logs files are, rather than using the compiled in default. In our
284 case the guess is not the same as the compiled default, so the script
285 suddenly stopped working when I started to use syslog. The patch checks
286 to see if log_file_path is "". If so, it attempts to read it from exim
287 with no configuration file to get the compiled in version, before it
288 falls back to the previous guessing code."
290 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
291 implementing BATV in an Exim configuration. See NewStuff for the gory
294 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
295 Makefile that are specific to HP-UX.
297 PH/18 If the "use_postmaster" option was set for a recipient callout together
298 with the "random" option, the postmaster address was used as the MAIL
299 FROM address for the random test, but not for the subsequent recipient
300 test. It is now used for both.
302 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
303 patch removes a few documentation additions to RFC 3028, because the
304 latest draft now contains them. It adds the new en;ascii-case comparator
305 and a new error check for 8bit text in MIME parts. Comparator and
306 require names are now matched exactly. I enabled the subaddress
307 extension, but it is not well tested yet (read: it works for me)."
309 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
310 rework some of the code of TK/09 above to avoid the hardwired use of
311 "%lld" and "long long". Replaced the call to snprintf() with a call to
314 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
315 records point to non-existent hosts", "retry timeout exceeded", and
316 "retry time not reached for any host after a long failure period".
318 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
319 experimental DomainKeys support:
321 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
322 (2) On an error such as an illegally used "control", the wrong name for
323 the control was given.
325 These problems did NOT occur unless DomainKeys support was compiled.
327 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
329 PH/24 Added ${if match_ip condition.
331 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
332 databases so that it will be absolutely obvious if a crash occurs in the
333 DB library. This is a regular occurrence (often caused by mis-matched
336 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
337 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
338 picked up on a user's system that detects such things. There doesn't seem
339 to be a gcc warning option for this - only an attribute that has to be
340 put on the function's prototype. It seems that in Fedora Core 4 they have
341 set this on a number of new functions. No doubt there will be more in due
344 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
345 specify a transport. However, if an address that was verified by such a
346 router was the subject of a callout, Exim crashed because it tried to
347 read the rcpt_include_affixes from the non-existent transport. Now it
348 just assumes that the setting of that option is false. This bug was
349 introduced by 4.51/PH/31.
351 PH/28 Changed -d+all to exclude +memory, because that information is very
352 rarely of interest, but it makes the output a lot bigger. People tend to
353 do -d+all out of habit.
355 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
356 code in os-type was giving problems when libc.so lives in lib64, like on
359 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
360 aren't the modern standard, and it seems that some systems' include files
361 don't always have them. Exim was already checking for some of the newer
362 ones like T_AAAA, and defining it itself. I've added checks for all the
363 record types that Exim uses.
365 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
366 not automatically generating a new one, as it is supposed to. This
367 prevented TLS from working. If the file did exist, but contained invalid
368 data, a new version was generated, as expected. It was only the case of a
369 non-existent file that was broken.
371 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
372 with a change in libdomainkeys > 0.64.
374 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
375 from DNS. If the selector record carries the flag, it now has
376 precedence over the domain-wide flag.
378 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
380 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
381 the use of a port name that isn't defined in /etc/services) occurred, the
382 message was deferred as in a normal delivery, and thus remained on the
383 spool, instead of being failed because of the mua_wrapper setting. This
384 is now fixed, and I tidied up some of the mua_wrapper messages at the
387 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
388 the messages in a hash of arrays rather than using individual hashes.
389 This is a bit cleaner and results in dramatic memory savings, albeit
390 at a slight CPU cost.
392 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
393 as requested by Marc Sherman.
395 SC/10 Eximstats: added histograms for user specified patterns as requested
398 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
400 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
401 fopen() in the content-scanning modules that did not already have it.
407 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
408 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
410 TK/02 Fix ACL "control" statement not being available in MIME ACL.
412 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
414 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
415 to test Sieve filters that use "vacation".
417 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
418 that changes the way the GnuTLS parameters are stored in the cache file.
419 The new format can be generated externally. For backward compatibility,
420 if the data in the cache doesn't make sense, Exim assumes it has read an
421 old-format file, and it generates new data and writes a new file. This
422 means that you can't go back to an older release without removing the
425 PH/03 A redirect router that has both "unseen" and "one_time" set does not
426 work if there are any delivery delays because "one_time" forces the
427 parent to be marked "delivered", so its unseen clone is never tried
428 again. For this reason, Exim now forbids the simultaneous setting of
431 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
432 redirected to themselves ("homonym" addresses). Read the long ChangeLog
433 entry if you want to know the details. The fix, however, neglected to
434 consider the case when local delivery batching is involved. The test for
435 "previously delivered" was not happening when checking to see if an
436 address could be batched with a previous (undelivered) one; under
437 certain circumstances this could lead to multiple deliveries to the same
440 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
441 in its include files, and this causes problems building Exim.
443 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
444 header_syntax) but Exim was just ignoring anything given after a slash.
445 In particular, this caused confusion with an attempt to use "verify =
446 reverse_host_lookup/defer_ok". An error is now given when options are
447 supplied for verify items that do not have them. (Maybe reverse_host_
448 lookup should have a defer_ok option, but that's a different point.)
450 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
451 defined by RFC 821) to 2048, because there were problems with some AUTH
452 commands, and RFC 1869 says the size should be increased for extended
453 SMTP commands that take arguments.
455 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
458 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
459 "unknown" error; now it says that the functionality isn't in the binary.
461 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
462 an address' error message when a string expansion fails (syntax or
463 whatever). Otherwise the password may appear in the log. Following change
464 PH/42 below, there is no longer a chance of it appearing in a bounce
467 PH/11 Installed exipick version 20050225.0 from John Jetmore.
469 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
470 of its addresses was ever tried. (Bugzilla bug #2.)
472 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
473 the result incorrectly in the debug output. (It correctly added a newline
474 to what was transported.)
476 TF/01 Added $received_time.
478 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
479 commented out examples of how to interface to a virus scanner and to
480 SpamAssassin. Also added commented examples of av_scanner and
481 spamd_address settings.
483 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
484 and controls are allowed in which ACLs. There were a couple of minor
485 errors. Some of the entries in the conditions table (which is a table of
486 where they are NOT allowed) were getting very unwieldy; rewrote them as a
487 negation of where the condition IS allowed.
489 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
491 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
492 header file does not have a version number, so I've had to invent a new
493 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
494 API. The code is untested by me (my Linux distribution still has 0.3.2 of
495 radiusclient), but it was contributed by a Radius user.
497 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
498 files or directories, for OpenSSL.
500 PH/19 When an Exim process that is running as root has to create an Exim log
501 file, it does so in a subprocess that runs as exim:exim so as to get the
502 ownership right at creation (otherwise, other Exim processes might see
503 the file with the wrong ownership). There was no test for failure of this
504 fork() call, which would lead to the process getting stuck as it waited
505 for a non-existent subprocess. Forks do occasionally fail when resources
506 run out. I reviewed all the other calls to fork(); they all seem to check
509 PH/20 When checking for unexpected SMTP input at connect time (before writing
510 the banner), Exim was not dealing correctly with a non-positive return
511 from the read() function. If the client had disconnected by this time,
512 the result was a log entry for a synchronization error with an empty
513 string after "input=" when read() returned zero. If read() returned -1
514 (an event I could not check), uninitialized data bytes were printed.
515 There were reports of junk text (parts of files, etc) appearing after
518 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
520 PH/22 Added support for macro redefinition, and (re)definition in between
521 driver and ACL definitions.
523 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
524 forgetting to use the resulting value; it was using the unexpanded value.
526 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
527 hadn't been configured. The fix is from Juergen Kreileder, who
528 understands it better than I do:
530 "Here's what I see happening with three configured cyrus_sasl
531 authenticators configured (plain, login, cram-md5):
533 On startup auth_cyrus_sasl_init() gets called for each of these.
534 This means three calls to sasl_listmech() without a specified mech_list.
535 => SASL tests which mechs of all available mechs actually work
536 => three warnings about OTP not working
537 => the returned list contains: plain, login, cram-md5, digest-md5, ...
539 With the patch, sasl_listmech() also gets called three times. But now
540 SASL's mech_list option is set to the server_mech specified in the the
541 authenticator. Or in other words, the answer from sasl_listmech()
542 gets limited to just the mech you're testing for (which is different
544 => the return list contains just 'plain' or 'login', 'cram-md5' or
545 nothing depending on the value of ob->server_mech.
547 I've just tested the patch: Authentication still works fine,
548 unavailable mechs specified in the exim configuration are still
549 caught, and the auth.log warnings about OTP are gone."
551 PH/25 When debugging is enabled, the contents of the command line are added
552 to the debugging output, even when log_selector=+arguments is not
555 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
556 answer is "GNU", and only if the return is "GNU/something" is the answer
559 PH/27 $acl_verify_message is now set immediately after the failure of a
560 verification in an ACL, and so is available in subsequent modifiers. In
561 particular, the message can be preserved by coding like this:
563 warn !verify = sender
564 set acl_m0 = $acl_verify_message
566 Previously, $acl_verify_message was set only while expanding "message"
567 and "log_message" when a very denied access.
569 PH/28 Modified OS/os.c-Linux with
571 -#ifndef OS_LOAD_AVERAGE
572 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
574 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
575 nomenclature these days.)
577 PH/29 Installed patch from the Sieve maintainer that adds the options
578 sieve_useraddress and sieve_subaddress to the redirect router.
580 PH/30 In these circumstances:
581 . Two addresses routed to the same list of hosts;
582 . First host does not offer TLS;
583 . First host accepts first address;
584 . First host gives temporary error to second address;
585 . Second host offers TLS and a TLS session is established;
586 . Second host accepts second address.
587 Exim incorrectly logged both deliveries with the TLS parameters (cipher
588 and peerdn, if requested) that were in fact used only for the second
591 PH/31 When doing a callout as part of verifying an address, Exim was not paying
592 attention to any local part prefix or suffix that was matched by the
593 router that accepted the address. It now behaves in the same way as it
594 does for delivery: the affixes are removed from the local part unless
595 rcpt_include_affixes is set on the transport.
597 PH/32 Add the sender address, as F=<...>, to the log line when logging a
598 timeout during the DATA phase of an incoming message.
600 PH/33 Sieve envelope tests were broken for match types other than :is. I have
601 applied a patch sanctioned by the Sieve maintainer.
603 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
604 the uid or gid is negative. A case of a negative gid caused this to be
605 noticed. The fix allows for either to be negative.
607 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
608 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
611 PH/36 The change PH/12 above was broken. Fixed it.
613 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
614 the grounds that routing the same address twice would always produce the
615 same answer. This might have been true once, but it is certainly no
616 longer true now. Routing a child address may depend on the previous
617 routing that produced that child. Some complicated redirection strategies
618 went wrong when messages had multiple recipients, and made Exim's
619 behaviour dependent on the order in which the addresses were given.
621 I have moved the duplicate checking until after the routing is complete.
622 Exim scans the addresses that are assigned to local and remote
623 transports, and removes any duplicates. This means that more work will be
624 done, as duplicates will always all be routed, but duplicates are
625 presumably rare, so I don't expect this is of any significance.
627 For deliveries to pipes, files, and autoreplies, the duplicate checking
628 still happens during the routing process, since they are not going to be
631 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
632 It corrects a timeout issue with spamd. This is Ian's comment: "The
633 background is that sometimes spamd either never reads data from a
634 connection it has accepted, or it never writes response data. The exiscan
635 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
636 blindly assumes that writes won't block so it may never time out."
638 PH/39 Allow G after quota size as well as K and M.
640 PH/40 The value set for $authenticated_id in an authenticator may not contain
641 binary zeroes or newlines because the value is written to log lines and
642 to spool files. There was no check on this. Now the value is run through
643 the string_printing() function so that such characters are converted to
644 printable escape sequences.
646 PH/41 $message_linecount is a new variable that contains the total number of
647 lines in the message. Compare $body_linecount, which is the count for the
650 PH/42 Exim no longer gives details of delivery errors for specific addresses in
651 bounce and delay warning messages, except in certain special cases, which
654 (a) An SMTP error message from a remote host;
655 (b) A message specified in a :fail: redirection;
656 (c) A message specified in a "fail" command in a system filter;
657 (d) A message specified in a FAIL return from the queryprogram router;
658 (e) A message specified by the cannot_route_message router option.
660 In these cases only, Exim does include the error details in bounce and
661 warning messages. There are also a few cases where bland messages such
662 as "unrouteable address" or "local delivery error" are given.
664 PH/43 $value is now also set for the "else" part of a ${run expansion.
666 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
667 being worked on, but at least Exim now implements the latest version to
670 PH/45 In a pipe transport, although a timeout while waiting for the pipe
671 process to complete was treated as a delivery failure, a timeout while
672 writing the message to the pipe was logged, but erroneously treated as a
673 successful delivery. Such timeouts include transport filter timeouts. For
674 consistency with the overall process timeout, these timeouts are now
675 treated as errors, giving rise to delivery failures by default. However,
676 there is now a new Boolean option for the pipe transport called
677 timeout_defer, which, if set TRUE, converts the failures into defers for
678 both kinds of timeout. A transport filter timeout is now identified in
681 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
682 systems where "make" and "gmake" are different, calling "gmake" at top
683 level broke things. I've arranged for the value of $(MAKE) to be passed
684 from the Makefile to this script so that it can call the same version of
688 A note about Exim versions 4.44 and 4.50
689 ----------------------------------------
691 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
692 changes of various kinds. As a consequence, a big documentation update was
693 needed. This delayed the release for rather longer than seemed good, especially
694 in the light of a couple of (minor) security issues. Therefore, the changes
695 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
696 release. So 4.44 and 4.50 are in effect two different branches that both start
699 I have left the 4.50 change log unchanged; it contains all the changes since
700 4.43. The change log for 4.44 is below; many of its items are identical to
701 those for 4.50. This seems to be the most sensible way to preserve the
702 historical information.
708 1. Minor wording change to the doc/README.SIEVE file.
710 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
711 computation of the current number of files was incorrect.
713 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
714 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
717 4. Give more explanation in the error message when the command for a transport
718 filter fails to execute.
720 5. There are several places where Exim runs a non-Exim command in a
721 subprocess. The SIGUSR1 signal should be disabled for these processes. This
722 was being done only for the command run by the queryprogram router. It is
723 now done for all such subprocesses. The other cases are: ${run, transport
724 filters, and the commands run by the lmtp and pipe transports.
726 6. Added CONFIGURE_GROUP build-time option.
728 7. Some older OS have a limit of 256 on the maximum number of file
729 descriptors. Exim was using setrlimit() to set 1000 as a large value
730 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
731 systems. I've change it so that if it can't get 1000, it tries for 256.
733 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
734 was an oversight, and furthermore, ever since the addition of extra
735 controls (e.g. 4.43/32), the checks on when to allow different forms of
736 "control" were broken. There should now be diagnostics for all cases when a
737 control that does not make sense is encountered.
739 9. Added the /retain_sender option to "control=submission".
741 10. $recipients is now available in the predata ACL (oversight).
743 11. Tidy the search cache before the fork to do a delivery from a message
744 received from the command line. Otherwise the child will trigger a lookup
745 failure and thereby defer the delivery if it tries to use (for example) a
746 cached ldap connection that the parent has called unbind on.
748 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
749 of $address_data from the recipient verification was clobbered by the
752 13. The value of address_data from a sender verification is now available in
753 $sender_address_data in subsequent conditions in the ACL statement.
755 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
757 15. Added a new option "connect=<time>" to callout options, to set a different
760 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
761 was its contents. (It was OK if the option was not defined at all.)
763 17. A "Completed" log line is now written for messages that are removed from
764 the spool by the -Mrm option.
766 18. New variables $sender_verify_failure and $recipient_verify_failure contain
767 information about exactly what failed.
769 19. Added -dd to debug only the daemon process.
771 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
772 handles timeouts, both on the server side and network timeouts. Renamed the
773 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
775 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
776 It is now set to "smtps".
778 22. $host_address is now set to the target address during the checking of
781 23. When checking ignore_target_hosts for an ipliteral router, no host name was
782 being passed; this would have caused $sender_host_name to have been used if
783 matching the list had actually called for a host name (not very likely,
784 since this list is usually IP addresses). A host name is now passed as
787 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
788 code that specifies a non-restarting handler (typically sigaction() in
789 modern systems) in an attempt to fix a rare and obscure crash bug.
791 25. Narrowed the window for a race in the daemon that could cause it to ignore
792 SIGCHLD signals. This is not a major problem, because they are used only to
793 wake it up if nothing else does.
795 26. A malformed maildirsize file could cause Exim to calculate negative values
796 for the mailbox size or file count. Odd effects could occur as a result.
797 The maildirsize information is now recalculated if the size or filecount
800 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
801 support for a long time. Removed HAVE_SYS_VFS_H.
803 28. Installed the latest version of exipick from John Jetmore.
805 29. In an address list, if the pattern was not a regular expression, an empty
806 subject address (from a bounce message) matched only if the pattern was an
807 empty string. Non-empty patterns were not even tested. This was the wrong
808 because it is perfectly reasonable to use an empty address as part of a
809 database query. An empty address is now tested by patterns that are
810 lookups. However, all the other forms of pattern expect the subject to
811 contain a local part and a domain, and therefore, for them, an empty
812 address still always fails if the pattern is not itself empty.
814 30. Exim went into a mad DNS loop when attempting to do a callout where the
815 host was specified on an smtp transport, and looking it up yielded more
818 31. Re-factored the code for checking spool and log partition space into a
819 function that finds that data and another that does the check. The former
820 is then used to implement four new variables: $spool_space, $log_space,
821 $spool_inodes, and $log_inodes.
823 32. The RFC2047 encoding function was originally intended for short strings
824 such as real names; it was not keeping to the 75-character limit for
825 encoded words that the RFC imposes. It now respects the limit, and
826 generates multiple encoded words if necessary. To be on the safe side, I
827 have increased the buffer size for the ${rfc2047: expansion operator from
830 33. It is now permitted to omit both strings after an "if" condition; if the
831 condition is true, the result is "true". As before, when the second string
832 is omitted, a false condition yields an empty string. This makes it less
833 cumbersome to write custom ACL and router conditions.
835 34. Failure to deliver a bounce message always caused it to be frozen, even if
836 there was an errors_to setting on the router. The errors_to setting is now
839 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
840 canonical form (fully expanded) before being placed in
841 $sender_host_address.
843 36. The table in the code that translates DNS record types into text (T_A to
844 "A" for instance) was missing entries for NS and CNAME. It is just possible
845 that this could have caused confusion if both these types were looked up
846 for the same domain, because the text type is used as part of Exim's
847 per-process caching. But the chance of anyone hitting this buglet seems
850 37. The dnsdb lookup has been extended in a number of ways.
852 (1) There is a new type, "zns", which walks up the domain tree until it
853 finds some nameserver records. It should be used with care.
855 (2) There is a new type, "mxh", which is like "mx" except that it returns
856 just the host names, not the priorities.
858 (3) It is now possible to give a list of domains (or IP addresses) to be
859 looked up. The behaviour when one of the lookups defers can be
860 controlled by a keyword.
862 (4) It is now possible to specify the separator character for use when
863 multiple records are returned.
865 38. The dnslists ACL condition has been extended: it is now possible to supply
866 a list of IP addresses and/or domains to be looked up in a particular DNS
869 39. Added log_selector=+queue_time_overall.
871 40. When running the queue in the test harness, wait just a tad after forking a
872 delivery process, to get repeatability of debugging output.
874 41. Include certificate and key file names in error message when GnuTLS fails
875 to set them up, because the GnuTLS error message doesn't include the name
876 of the failing file when there is a problem reading it.
878 42. Allow both -bf and -bF in the same test run.
880 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
882 44. The "Exiscan patch" is now merged into the mainline Exim source.
884 45. Sometimes the final signoff response after QUIT could fail to get
885 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
886 < 0 before doing a fflush(). This bug looks as though it goes back to the
887 introduction of TLS in release 3.20, but "sometimes" must have been rare
888 because the tests only now provoked it.
890 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
891 (this can affect the format of dates).
893 47. exim_tidydb, when checking for the continued existence of a message for
894 which it has found a message-specific retry record, was not finding
895 messages that were in split spool directories. Consequently, it was
896 deleting retry records that should have stayed in existence.
898 48. Steve fixed some bugs in eximstats.
900 49. The SPA authentication driver was not abandoning authentication and moving
901 on to the next authenticator when an expansion was forced to fail,
902 contradicting the general specification for all authenticators. Instead it
903 was generating a temporary error. It now behaves as specified.
905 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
906 (the order specifies the preference for clients). The order is now AES256,
907 AES128, 3DES, ARCFOUR128.
909 51. Small patch to Sieve code - explicitly set From: when generating an
912 52. Exim crashed if a remote delivery caused a very long error message to be
913 recorded - for instance if somebody sent an entire SpamAssassin report back
914 as a large number of 550 error lines. This bug was coincidentally fixed by
915 increasing the size of one of Exim's internal buffers (big_buffer) that
916 happened as part of the Exiscan merge. However, to be on the safe side, I
917 have made the code more robust (and fixed the comments that describe what
920 53. Now that there can be additional text after "Completed" in log lines (if
921 the queue_time_overall log selector is set), a one-byte patch to exigrep
922 was needed to allow it to recognize "Completed" as not the last thing in
925 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
926 patch that reportedly fixes this has been added. I am not expert enough to
927 create a test for it. This is what the patch creator wrote:
929 "I found a little strange behaviour of ldap code when working with
930 Windows 2003 AD Domain, where users was placed in more than one
931 Organization Units. When I tried to give exim partial DN, the exit code
932 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
933 But simultaneously result of request was absolutely normal ldap result,
934 so I produce this patch..."
936 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
937 REFERENCE, so I have modified the code to exclude the patch when that macro
940 55. Some experimental protocols are using DNS PTR records for new purposes. The
941 keys for these records are domain names, not reversed IP addresses. The
942 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
943 leaves it alone. Component reversal etc. now happens only for IP addresses.
946 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
948 57. Double the size of the debug message buffer (to 2048) so that more of very
949 long debug lines gets shown.
951 58. The exicyclog utility now does better if the number of log files to keep
952 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
954 59. Two changes related to the smtp_active_hostname option:
956 (1) $smtp_active_hostname is now available as a variable.
957 (2) The default for smtp_banner uses $smtp_active_hostname instead
958 of $primary_hostname.
960 60. The host_aton() function is supposed to be passed a string that is known
961 to be a valid IP address. However, in the case of IPv6 addresses, it was
962 not checking this. This is a hostage to fortune. Exim now panics and dies
963 if the condition is not met. A case was found where this could be provoked
964 from a dnsdb PTR lookup with an IPv6 address that had more than 8
965 components; fortuitously, this particular loophole had already been fixed
966 by change 4.50/55 above.
968 If there are any other similar loopholes, the new check in host_aton()
969 itself should stop them being exploited. The report I received stated that
970 data on the command line could provoke the exploit when Exim was running as
971 exim, but did not say which command line option was involved. All I could
972 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
976 61. There was a buffer overflow vulnerability in the SPA authentication code
977 (which came originally from the Samba project). I have added a test to the
978 spa_base64_to_bits() function which I hope fixes it.
981 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
982 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
984 63. The daemon start-up calls getloadavg() while still root for those OS that
985 need the first call to be done as root, but it missed one case: when
986 deliver_queue_load_max is set with deliver_drop_privilege. This is
987 necessary for the benefit of the queue runner, because there is no re-exec
988 when deliver_drop_privilege is set.
990 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
993 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
994 was in use, was not putting the data itself into the right store pool;
995 consequently, it could be overwritten for a subsequent message in the same
996 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
999 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1001 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1002 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1003 the function were treating the return as a boolean value, which happened to
1004 work because 0=false and not-0=true, but is not correct code.
1006 68. The host_aton() function was not handling scoped IPv6 addresses (those
1007 with, for example, "%eth0" on the end) correctly.
1009 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1010 negated items (that is, ~something) in unsigned ints. Some compilers
1011 apparently mutter when there is no cast.
1013 70. If an address verification called from an ACL failed, and did not produce a
1014 user-specific message (i.e. there was only a "system" message), nothing was
1015 put in $acl_verify_message. In this situation, it now puts the system
1018 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1019 session; change 4.31/43 added the unwanted input to the log line - except
1020 that it did not do this in the start of session case. It now does.
1022 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1023 This is wrong and can cause the other end to generate a synchronization
1024 error if it is another Exim or anything else that does the synchronization
1025 check. A QUIT command is no longer sent after a timeout.
1027 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1028 during host lookups.
1030 74. The defer_ok option of callout verification was not working if it was used
1031 when verifying addresses in header lines, that is, for this case:
1033 verify = header_sender/callout=defer_ok
1035 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
1036 those file descriptors could be used for SMTP connections. If anything
1037 wrote to stderr (the example that came up was "warn" in embedded Perl), it
1038 could be sent to the SMTP client, causing chaos. The daemon now opens
1039 stdin, stdout, and stderr to /dev/null when it puts itself into the
1042 76. Arrange for output from Perl's "warn" command to be written to Exim's main
1043 log by default. The user can override this with suitable Perl magic.
1045 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
1046 the log message when discard triggers, was not working for the DATA ACL or
1047 for the non-SMTP ACL.
1049 78. Error message wording change in sieve.c.
1051 79. If smtp_accept_max_per_host was set, the number of connections could be
1052 restricted to fewer than expected, because the daemon was trying to set up
1053 a new connection before checking whether the processes handling previous
1054 connections had finished. The check for completed processes is now done
1055 earlier. On busy systems, this bug wouldn't be noticed because something
1056 else would have woken the daemon, and it would have reaped the completed
1059 80. If a message was submitted locally by a user whose login name contained one
1060 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
1061 It caused a spool format error. I have fixed the spool reading code. A
1062 related problem was that the "from" clause in the Received: line became
1063 illegal because of the space(s). It is now covered by ${quote_local_part.
1065 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
1068 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
1070 83. Patch from Sieve maintainer to fix unterminated string problem in
1071 "vacation" handling.
1073 84. Some minor changes to the Linux configuration files to help with other
1074 OS variants using glibc.
1076 85. One more patch for Sieve to update vacation handling to latest spec.
1079 ----------------------------------------------------
1080 See the note above about the 4.44 and 4.50 releases.
1081 ----------------------------------------------------
1087 1. Change 4.43/35 introduced a bug that caused file counts to be
1088 incorrectly computed when quota_filecount was set in an appendfile
1091 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1092 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1095 3. Give more explanation in the error message when the command for a transport
1096 filter fails to execute.
1098 4. There are several places where Exim runs a non-Exim command in a
1099 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1100 was being done only for the command run by the queryprogram router. It is
1101 now done for all such subprocesses. The other cases are: ${run, transport
1102 filters, and the commands run by the lmtp and pipe transports.
1104 5. Some older OS have a limit of 256 on the maximum number of file
1105 descriptors. Exim was using setrlimit() to set 1000 as a large value
1106 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1107 systems. I've change it so that if it can't get 1000, it tries for 256.
1109 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1110 was an oversight, and furthermore, ever since the addition of extra
1111 controls (e.g. 4.43/32), the checks on when to allow different forms of
1112 "control" were broken. There should now be diagnostics for all cases when a
1113 control that does not make sense is encountered.
1115 7. $recipients is now available in the predata ACL (oversight).
1117 8. Tidy the search cache before the fork to do a delivery from a message
1118 received from the command line. Otherwise the child will trigger a lookup
1119 failure and thereby defer the delivery if it tries to use (for example) a
1120 cached ldap connection that the parent has called unbind on.
1122 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1123 of $address_data from the recipient verification was clobbered by the
1124 sender verification.
1126 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1127 was its contents. (It was OK if the option was not defined at all.)
1129 11. A "Completed" log line is now written for messages that are removed from
1130 the spool by the -Mrm option.
1132 12. $host_address is now set to the target address during the checking of
1133 ignore_target_hosts.
1135 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1136 being passed; this would have caused $sender_host_name to have been used if
1137 matching the list had actually called for a host name (not very likely,
1138 since this list is usually IP addresses). A host name is now passed as
1141 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1142 code that specifies a non-restarting handler (typically sigaction() in
1143 modern systems) in an attempt to fix a rare and obscure crash bug.
1145 15. Narrowed the window for a race in the daemon that could cause it to ignore
1146 SIGCHLD signals. This is not a major problem, because they are used only to
1147 wake it up if nothing else does.
1149 16. A malformed maildirsize file could cause Exim to calculate negative values
1150 for the mailbox size or file count. Odd effects could occur as a result.
1151 The maildirsize information is now recalculated if the size or filecount
1154 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1155 support for a long time. Removed HAVE_SYS_VFS_H.
1157 18. Updated exipick to current release from John Jetmore.
1159 19. Allow an empty sender to be matched against a lookup in an address list.
1160 Previously the only cases considered were a regular expression, or an
1163 20. Exim went into a mad DNS lookup loop when doing a callout where the
1164 host was specified on the transport, if the DNS lookup yielded more than
1167 21. The RFC2047 encoding function was originally intended for short strings
1168 such as real names; it was not keeping to the 75-character limit for
1169 encoded words that the RFC imposes. It now respects the limit, and
1170 generates multiple encoded words if necessary. To be on the safe side, I
1171 have increased the buffer size for the ${rfc2047: expansion operator from
1174 22. Failure to deliver a bounce message always caused it to be frozen, even if
1175 there was an errors_to setting on the router. The errors_to setting is now
1178 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1179 canonical form (fully expanded) before being placed in
1180 $sender_host_address.
1182 24. Updated eximstats to version 1.33
1184 25. Include certificate and key file names in error message when GnuTLS fails
1185 to set them up, because the GnuTLS error message doesn't include the name
1186 of the failing file when there is a problem reading it.
1188 26. Expand error message when OpenSSL has problems setting up cert/key files.
1191 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1192 (this can affect the format of dates).
1194 28. exim_tidydb, when checking for the continued existence of a message for
1195 which it has found a message-specific retry record, was not finding
1196 messages that were in split spool directories. Consequently, it was
1197 deleting retry records that should have stayed in existence.
1199 29. eximstats updated to version 1.35
1200 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1201 1.35 - bugfix such that pie charts by volume are generated correctly
1203 30. The SPA authentication driver was not abandoning authentication and moving
1204 on to the next authenticator when an expansion was forced to fail,
1205 contradicting the general specification for all authenticators. Instead it
1206 was generating a temporary error. It now behaves as specified.
1208 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1209 (the order specifies the preference for clients). The order is now AES256,
1210 AES128, 3DES, ARCFOUR128.
1212 31. Small patch to Sieve code - explicitly set From: when generating an
1215 32. Exim crashed if a remote delivery caused a very long error message to be
1216 recorded - for instance if somebody sent an entire SpamAssassin report back
1217 as a large number of 550 error lines. This bug was coincidentally fixed by
1218 increasing the size of one of Exim's internal buffers (big_buffer) that
1219 happened as part of the Exiscan merge. However, to be on the safe side, I
1220 have made the code more robust (and fixed the comments that describe what
1223 33. Some experimental protocols are using DNS PTR records for new purposes. The
1224 keys for these records are domain names, not reversed IP addresses. The
1225 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1226 leaves it alone. Component reversal etc. now happens only for IP addresses.
1229 34. The host_aton() function is supposed to be passed a string that is known
1230 to be a valid IP address. However, in the case of IPv6 addresses, it was
1231 not checking this. This is a hostage to fortune. Exim now panics and dies
1232 if the condition is not met. A case was found where this could be provoked
1233 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1234 components; fortuitously, this particular loophole had already been fixed
1235 by change 4.50/55 or 4.44/33 above.
1237 If there are any other similar loopholes, the new check in host_aton()
1238 itself should stop them being exploited. The report I received stated that
1239 data on the command line could provoke the exploit when Exim was running as
1240 exim, but did not say which command line option was involved. All I could
1241 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1242 running as the user.
1245 35. There was a buffer overflow vulnerability in the SPA authentication code
1246 (which came originally from the Samba project). I have added a test to the
1247 spa_base64_to_bits() function which I hope fixes it.
1250 36. The daemon start-up calls getloadavg() while still root for those OS that
1251 need the first call to be done as root, but it missed one case: when
1252 deliver_queue_load_max is set with deliver_drop_privilege. This is
1253 necessary for the benefit of the queue runner, because there is no re-exec
1254 when deliver_drop_privilege is set.
1256 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1257 was in use, was not putting the data itself into the right store pool;
1258 consequently, it could be overwritten for a subsequent message in the same
1259 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1262 38. Sometimes the final signoff response after QUIT could fail to get
1263 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1264 < 0 before doing a fflush(). This bug looks as though it goes back to the
1265 introduction of TLS in release 3.20, but "sometimes" must have been rare
1266 because the tests only now provoked it.
1272 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1273 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1274 Now it returns an integer. A number of calls were still expecting a T/F
1275 return. Fortuitously, in all cases, the tests worked in OK situations,
1276 which is the norm. However, things would have gone wrong on any write
1277 failures on the smtp file descriptor. This function is used when sending
1278 messages over SMTP and also when doing verify callouts.
1280 2. When Exim is called to do synchronous delivery of a locally submitted
1281 message (the -odf or -odi options), it no longer closes stderr before doing
1284 3. Implemented the mua_wrapper option.
1286 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1288 5. Implemented the functions header_remove(), header_testname(),
1289 header_add_at_position(), and receive_remove_recipient(), and exported them
1292 6. If an ACL "warn" statement specified the addition of headers, Exim already
1293 inserted X-ACL-Warn: at the start if there was no header name. However, it
1294 was not making this test for the second and subsequent header lines if
1295 there were newlines in the string. This meant that an invalid header could
1296 be inserted if Exim was badly configured.
1298 7. Allow an ACL "warn" statement to add header lines at the start or after all
1299 the Received: headers, as well as at the end.
1301 8. Added the rcpt_4xx retry error code.
1303 9. Added postmaster_mailfrom=xxx to callout verification option.
1305 10. Added mailfrom=xxxx to the callout verification option, for verify=
1308 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1309 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1311 12. Inserted some casts to stop certain compilers warning when using pointer
1312 differences as field lengths or precisions in printf-type calls (mostly
1313 affecting debugging statements).
1315 13. Added optional readline() support for -be (dynamically loaded).
1317 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1318 same clock tick as a message's arrival, so that its received time was the
1319 same as the "first fail" time on the retry record, and that message
1320 remained on the queue past the ultimate address timeout, every queue runner
1321 would try a delivery (because it was past the ultimate address timeout) but
1322 after another failure, the ultimate address timeout, which should have then
1323 bounced the address, did not kick in. This was a "< instead of <=" error;
1324 in most cases the first failure would have been in the next clock tick
1325 after the received time, and all would be well.
1327 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1328 being recognized when the domain list was tested by the match_domain
1329 condition in an expansion string.
1331 16. Added the ${str2b64: operator.
1333 17. Exim was always calling setrlimit() to set a large limit for the number of
1334 processes, without checking whether the existing limit was already
1335 adequate. (It did check for the limit on file descriptors.) Furthermore,
1336 errors from getrlimit() and setrlimit() were being ignored. Now they are
1337 logged to the main and panic logs, but Exim does carry on, to try to do its
1338 job under whatever limits there are.
1340 18. Imported PCRE 5.0.
1342 19. Trivial typo in log message " temporarily refused connection" (the leading
1345 20. If the log selector return_path_on_delivery was set and an address was
1346 redirected to /dev/null, the delivery process crashed because it assumed
1347 that a return path would always be set for a "successful" delivery. In this
1348 case, the whole delivery is bypassed as an optimization, and therefore no
1351 21. Internal re-arrangement: the function for sending a challenge and reading
1352 a response while authentication was assuming a zero-terminated challenge
1353 string. It's now changed to take a pointer and a length, to allow for
1354 binary data in such strings.
1356 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1358 23. Exim was not respecting finduser_retries when seeking the login of the
1359 uid under which it was called; it was always trying 10 times. (The default
1360 setting of finduser_retries is zero.) Also, it was sleeping after the final
1361 failure, which is pointless.
1363 24. Implemented tls_on_connect_ports.
1365 25. Implemented acl_smtp_predata.
1367 26. If the domain in control=submission is set empty, Exim assumes that the
1368 authenticated id is a complete email address when it generates From: or
1369 Sender: header lines.
1371 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1372 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1373 chown and chgrp in /bin and hostname in /usr/bin.
1375 28. Exim was keeping the "process log" file open after each use, just as it
1376 does for the main log. This opens the possibility of it remaining open for
1377 long periods when the USR1 signal hits a daemon. Occasional processlog
1378 errors were reported, that could have been caused by this. Anyway, it seems
1379 much more sensible not to leave this file open at all, so that is what now
1382 29. The long-running daemon process does not normally write to the log once it
1383 has entered its main loop, and it closes the log before doing so. This is
1384 so that log files can straightforwardly be renamed and moved. However,
1385 there are a couple of unusual error situations where the daemon does write
1386 log entries, and I had neglected to close the log afterwards.
1388 30. The text of an SMTP error response that was received during a remote
1389 delivery was being truncated at 512 bytes. This is too short for some of
1390 the long messages that one sometimes sees. I've increased the limit to
1393 31. It is now possible to make retry rules that apply only when a message has a
1394 specific sender, in particular, an empty sender.
1396 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1397 it possible to be selective about when SMTP synchronization is enforced.
1399 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1401 32. Implemented hosts_connection_nolog.
1403 33. Added an ACL for QUIT.
1405 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1408 35. Added mailbox_size and mailbox_filecount to appendfile.
1410 36. Added control = no_multiline_responses to ACLs.
1412 37. There was a bug in the logic of the code that waits for the clock to tick
1413 in the case where the clock went backwards by a substantial amount such
1414 that the microsecond fraction of "now" was more than the microsecond
1415 fraction of "then" (but the whole seconds number was less).
1417 38. Added support for the libradius Radius client library this is found on
1418 FreeBSD (previously only the radiusclient library was supported).
1424 1. When certain lookups returned multiple values in the form name=value, the
1425 quoting of the values was not always being done properly. Specifically:
1426 (a) If the value started with a double quote, but contained no whitespace,
1428 (b) If the value contained whitespace other than a space character (i.e.
1429 tabs or newlines or carriage returns) it was not quoted.
1430 This fix has been applied to the mysql and pgsql lookups by writing a
1431 separate quoting function and calling it from the lookup code. The fix
1432 should probably also be applied to nisplus, ibase and oracle lookups, but
1433 since I cannot test any of those, I have not disturbed their existing code.
1435 2. A hit in the callout cache for a specific address caused a log line with no
1436 reason for rejecting RCPT. Now it says "Previous (cached) callout
1437 verification failure".
1439 3. There was an off-by-one bug in the queryprogram router. An over-long
1440 return line was truncated at 256 instead of 255 characters, thereby
1441 overflowing its buffer with the terminating zero. As well as fixing this, I
1442 have increased the buffer size to 1024 (and made a note to document this).
1444 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1445 when Exim is waiting for an SMTP response from a remote server, Exim
1446 restarts its select() call on the socket, thereby resetting its timeout.
1447 This is not a problem when such interrupts are rare. Somebody set up a cron
1448 job to run exiwhat every 2 minutes, which is less than the normal select()
1449 timeout (5 or 10 minutes). This meant that the select() timeout never
1450 kicked in because it was always reset. I have fixed this by comparing the
1451 time when an interrupt arrives with the time at the start of the first call
1452 to select(). If more time than the timeout has elapsed, the interrupt is
1453 treated as a timeout.
1455 5. Some internal re-factoring in preparation for the addition of Sieve
1456 extensions (by MH). In particular, the "personal" test is moved to a
1457 separate function, and given an option for scanning Cc: and Bcc: (which is
1458 not set for Exim filters).
1460 6. When Exim created an email address using the login of the caller as the
1461 local part (e.g. when creating a From: or Sender: header line), it was not
1462 quoting the local part when it contained special characters such as @.
1464 7. Installed new OpenBSD configuration files.
1466 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1467 try to make them clearer.
1469 9. Callout options, other than the timeout value, were being ignored when
1470 verifying sender addresses in header lines. For example, when using
1472 verify = header_sender/callout=no_cache
1474 the cache was (incorrectly) being used.
1476 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1477 only the Cygwin environment.
1479 11. When return_path_on_delivery was set as a log selector, if different remote
1480 addresses in the same message used different return paths and parallel
1481 remote delivery occurred, the wrong values would sometimes be logged.
1482 (Whenever a remote delivery process finished, the return path value from
1483 the most recently started remote delivery process was logged.)
1485 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1486 lines when AUTH and/or TLS are in use. This is the "received protocol"
1487 field. Exim used to use "asmtp" for authenticated SMTP, without any
1488 indication (in the protocol name) for TLS use. Now it follows the RFC and
1489 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1490 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1491 names appear in log lines as well as in Received: header lines.
1493 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1494 extensions, and comparison tests, and to fix some bugs.
1496 14. Changes to the "personal" filter test:
1498 (1) The test was buggy in that it was just doing the equivalent of
1499 "contains" tests on header lines. For example, if a user's address was
1500 anne@some.where, the "personal" test would incorrectly be true for
1502 To: susanne@some.where
1504 This test is now done by extracting each address from the header in turn,
1505 and checking the entire address. Other tests that are part of "personal"
1506 are now done using regular expressions (for example, to check local parts
1507 of addresses in From: header lines).
1509 (2) The list of non-personal local parts in From: addresses has been
1510 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1511 taken from the Sieve specification recommendations.
1513 (3) If the message contains any header line starting with "List-" it is
1514 treated as non-personal.
1516 (4) The test for "circular" in the Subject: header line has been removed
1517 because it now seems ill-conceived.
1519 15. Minor typos in src/EDITME comments corrected.
1521 16. Installed latest exipick from John Jetmore.
1523 17. If headers_add on a router specified a text string that was too long for
1524 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1525 of string_sprintf() is now avoided.
1527 18. $message_body_size was not set (it was always zero) when running the DATA
1528 ACL and the local_scan() function.
1530 19. For the "mail" command in an Exim filter, no default was being set for
1531 the once_repeat time, causing a random time value to be used if "once" was
1532 specified. (If the value happened to be <= 0, no repeat happened.) The
1533 default is now 0s, meaning "never repeat". The "vacation" command was OK
1534 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1535 (I found it when inspecting the code).
1537 20. There is now an overall timeout for performing a callout verification. It
1538 defaults to 4 times the callout timeout, which applies to individual SMTP
1539 commands during the callout. The overall timeout applies when there is more
1540 than one host that can be tried. The timeout is checked before trying the
1541 next host. This prevents very long delays if there are a large number of
1542 hosts and all are timing out (e.g. when the network connections are timing
1543 out). The value of the overall timeout can be changed by specifying an
1544 additional sub-option for "callout", called "maxwait". For example:
1546 verify = sender/callout=5s,maxwait=20s
1548 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1549 to the end before writing, but this should make it even safer).
1551 22. Exim was forgetting that it had advertised PIPELINING for the second and
1552 subsequent messages on an SMTP connection. It was also not resetting its
1553 memory on STARTTLS and an internal HELO.
1555 23. When Exim logs an SMTP synchronization error within a session, it now
1556 records whether PIPELINING has been advertised or not.
1558 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1559 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1560 rather than long int.
1562 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1564 26. Added the never_mail option to autoreply.
1570 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1571 crash if the getsockname() call failed; this can happen if a connection is
1572 closed very soon after it is established. The problem was simply in the
1573 order in which certain operations were done, causing Exim to try to write
1574 to the SMTP stream before it had set up the file descriptor. The bug has
1575 been fixed by making things happen in the correct order.
1581 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1582 before the connection was closed, thus losing the rejection response.
1584 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1585 some early Solaris releases, but causes trouble in current releases where
1586 socklen_t is defined.
1588 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1591 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1594 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1595 that releasing the top of it at the end releases what was used for sub-
1596 expansions (unless the block got too big). However, discard this block if
1597 the first thing is a variable or header, so that we can use its block when
1598 it is dynamic (useful for very large $message_headers, for example).
1600 6. Lookups now cache *every* query, not just the most recent. A new, separate
1601 store pool is used for this. It can be recovered when all lookup caches are
1602 flushed. Lookups now release memory at the end of their result strings.
1603 This has involved some general refactoring of the lookup sources.
1605 7. Some code has been added to the store_xxx() functions to reduce the amount
1606 of flapping under certain conditions.
1608 8. log_incoming_interface used to affect only the <= reception log lines. Now
1609 it causes the local interface and port to be added to several more SMTP log
1610 lines, for example "SMTP connection from", and rejection lines.
1612 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1614 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1616 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1617 could be overwritten at the end of the current message (or the start of a
1618 new message if it was set in a HELO ACL). The value is now preserved for
1619 the duration of the SMTP connection.
1621 12. If a transport had a headers_rewrite setting, and a matching header line
1622 contained an unqualified address, that address was qualified, even if it
1623 did not match any rewriting rules. The underlying bug was that the values
1624 of the flags that permit the existence of unqualified sender and recipient
1625 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1626 non-local messages, and by -bnq for local messages) were not being
1627 preserved with the message after it was received.
1629 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1630 "next input=" as part of the text comprising the host identity instead of
1631 the correct text. The code was using the same buffer for two different
1632 strings. However, depending on which order the printing function evaluated
1633 its arguments, the bug did not always show up. Under Linux, for example, my
1634 test suite worked just fine.
1636 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1637 doesn't work with some older versions of Perl. It has been changed to "my",
1638 which in any case is probably the better facility to use.
1640 15. A really picky compiler found some instances of statements for creating
1641 error messages that either had too many or two few arguments for the format
1644 16. The size of the buffer for calls to the DNS resolver has been increased
1645 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1646 for addresses that have a lot of PTR records. This alleviates a problem; it
1647 does not fully solve it.
1649 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1650 buffer now truncates the list and logs the incident, which is the same
1651 action as happens when Exim is looking up a host name and its aliases.
1652 Previously in this situation something unpredictable would happen;
1653 sometimes it was "internal error: store_reset failed".
1655 18. If a server dropped the connection unexpectedly when an Exim client was
1656 using GnuTLS and trying to read a response, the client delivery process
1657 crashed while trying to generate an error log message.
1659 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1660 string, for example:
1662 warn message = H1: something\nH2: something
1664 the text was added as a single header line from Exim's point of view
1665 though it ended up OK in the delivered message. However, searching for the
1666 second and subsequent header lines using $h_h2: did not work. This has been
1667 fixed. Similarly, if a system filter added multiple headers in this way,
1668 the routers could not see them.
1670 20. Expanded the error message when iplsearch is called with an invalid key to
1671 suggest using net-iplsearch in a host list.
1673 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1674 ACLs are no longer actually imposed (and a message to that effect is
1677 22. If a "gecos" field in a passwd entry contained escaped characters, in
1678 particular, if it contained a \" sequence, Exim got it wrong when building
1679 a From: or a Sender: header from that name. A second bug also caused
1680 incorrect handling when an unquoted " was present following a character
1681 that needed quoting.
1683 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1684 was not being matched caselessly.
1686 24. Arranged for all hyphens in the exim.8 source to be escaped with
1689 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1690 properly. Recipient callout cache records were still being keyed to include
1691 the sender, even when use_sender was set false. This led to far more
1692 callouts that were necessary. The sender is no longer included in the key
1693 when use_sender is false.
1695 26. Added "control = submission" modifier to ACLs.
1697 27. Added the ${base62d: operator to decode base 62 numbers.
1699 28. dnsdb lookups can now access SRV records.
1701 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1702 the configuration file.
1704 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1705 (-v) mode. This makes the output for a verbose queue run more intelligible.
1707 31. Added a use_postmaster feature to recipient callouts.
1709 32. Added the $body_zerocount variable, containing the number of binary zero
1710 bytes in the message body.
1712 33. The time of last modification of the "new" subdirectory is now used as the
1713 "mailbox time last read" when there is a quota error for a maildir
1716 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1718 35. Added +ignore_unknown as a special item in host lists.
1720 36. Code for decoding IPv6 addresses in host lists is now included, even if
1721 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1722 address was recognized as an IP address, but was then not correctly decoded
1723 into binary, causing unexpected and incorrect effects when compared with
1730 1. Very minor rewording of debugging text in manualroute to say "list of
1731 hosts" instead of "hostlist".
1733 2. If verify=header_syntax was set, and a header line with an unqualified
1734 address (no domain) and a large number of spaces between the end of the
1735 name and the colon was received, the reception process suffered a buffer
1736 overflow, and (when I tested it) crashed. This was caused by some obsolete
1737 code that should have been removed. The fix is to remove it!
1739 3. When running in the test harness, delay a bit after writing a bounce
1740 message to get a bit more predictability in the log output.
1742 4. Added a call to search_tidyup() just before forking a reception process. In
1743 theory, someone could use a lookup in the expansion of smtp_accept_max_
1744 per_host which, without the tidyup, could leave open a database connection.
1746 5. Added the variables $recipient_data and $sender_data which get set from a
1747 lookup success in an ACL "recipients" or "senders" condition, or a router
1748 "senders" option, similar to $domain_data and $local_part_data.
1750 6. Moved the writing of debug_print from before to after the "senders" test
1753 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1754 problems for message scanning, either using a data ACL, or using
1755 local_scan() because the Received: header was not generated till after they
1756 were called (in order to set the time as the time of reception completion).
1757 I have revised the way this works. The header is now generated after the
1758 body is received, but before the ACL or local_scan() are called. After they
1759 are run, the timestamp in the header is updated.
1765 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1766 before starting a queue runner without re-exec. This happened only when
1767 deliver_drop_privilege was set or when the Exim user was set to root. The
1768 effect of the bug was that timeouts during subsequent deliveries caused
1769 crashes instead of being properly handled. The handler is now left at its
1770 default (and expected) setting.
1772 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1773 message, again when deliver_drop_privilege is set or Exim is run as root.
1774 The bug described in (1) was not present in this case, but the tidying up
1775 of the other signals was missing. I have made the two cases consistent.
1777 3. The ignore_target_hosts setting on a manualroute router was being ignored
1778 for hosts that were looked up using the /MX notation.
1780 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1783 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1784 operated on the sender address. After changing the $sender_address to <>
1785 for the sender address verify, Exim was re-instated it as the original
1786 (before rewriting) address, but remembering that it had rewritten it, so it
1787 wasn't rewriting it again. This bug also had the effect of breaking the
1788 sender address verification caching when the sender address was rewritten.
1790 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1791 This has been changed so that if the ip literal address matches
1792 ignore_target_hosts, the router declines.
1794 7. Added expansion conditions match_domain, match_address, and match_local_
1795 part (NOT match_host).
1797 8. The placeholder for the Received: header didn't have a length field set.
1799 9. Added code to Exim itself and to exim_lock to test for a specific race
1800 condition that could lead to file corruption when using MBX delivery. The
1801 issue is with the lockfile that is created in /tmp. If this file is removed
1802 after a process has opened it but before that process has acquired a lock,
1803 there is the potential for a second process to recreate the file and also
1804 acquire a lock. This could lead to two Exim processes writing to the file
1805 at the same time. The added code performs the same test as UW imapd; it
1806 checks after acquiring the lock that its file descriptor still refers to
1807 the same named file.
1809 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1810 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1813 11. Added the smtp_active_hostname option. If used, this will typically be made
1814 to depend on the incoming interface address. Because $interface_address is
1815 not set up until the daemon has forked a reception process, error responses
1816 that can happen earlier (such as "too many connections") no longer contain
1819 12. If an expansion in a condition on a "warn" statement fails because a lookup
1820 defers, the "warn" statement is abandoned, and the next ACL statement is
1821 processed. Previously this caused the whole ACL to be aborted.
1823 13. Added the iplsearch lookup type.
1825 14. Added ident_timeout as a log selector.
1827 15. Added tls_certificate_verified as a log selector.
1829 16. Added a global option tls_require_ciphers (compare the smtp transport
1830 option of the same name). This controls incoming TLS connections.
1832 17. I finally figured out how to make tls_require_ciphers do a similar thing
1833 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1834 before starting the TLS session.
1836 18. Tabs are now shown as \t in -bP output.
1838 19. If the log selector return_path_on_delivery was set, Exim crashed when
1839 bouncing a message because it had too many Received: header lines.
1841 20. If two routers both had headers_remove settings, and the first one included
1842 a superfluous trailing colon, the final name in the first list and the
1843 first name in the second list were incorrectly joined into one item (with a
1844 colon in the middle).
1850 1. Added -C and -D options to the exinext utility, mainly to make it easier
1851 to include in the automated testing, but these could be helpful when
1852 multiple configurations are in use.
1854 2. The exinext utility was not formatting the output nicely when there was
1855 an alternate port involved in the retry record key, nor when there was a
1856 message id as well (for retries that were specific to a specific message
1857 and a specific host). It was also confused by IPv6 addresses, because of
1858 the additional colons they contain. I have fixed the IPv4 problem, and
1859 patched it up to do a reasonable job for IPv6.
1861 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1862 delivery, the log line now contains "pipelined" if PIPELINING was used.
1864 4. An SMTP transport process used to panic and die if the bind() call to set
1865 an explicit outgoing interface failed. This has been changed; it is now
1866 treated in the same way as a connect() failure.
1868 5. A reference to $sender_host_name in the part of a conditional expansion
1869 that was being skipped was still causing a DNS lookup. This no longer
1872 6. The def: expansion condition was not recognizing references to header lines
1873 that used bh_ and bheader_.
1875 7. Added the _cache feature to named lists.
1877 8. The code for checking quota_filecount in the appendfile transport was
1878 allowing one more file than it should have been.
1880 9. For compatibility with Sendmail, the command line option
1888 and sets the incoming protocol and host name (for trusted callers). The
1889 host name and its colon can be omitted when only the protocol is to be set.
1890 Note the Exim already has two private options, -pd and -ps, that refer to
1891 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1892 "s", but I don't think that's a major issue.
1894 10. A number of refactoring changes to the code, none of which should affect
1897 (a) The number of logging options was getting close to filling up the
1898 32-bit word that was used as a bit map. I have split them into two classes:
1899 those that are passed in the argument to log_write(), and those that are
1900 only ever tested independently outside of that function. These are now in
1901 separate 32-bit words, so there is plenty of room for expansion again.
1902 There is no change in the user interface or the logging behaviour.
1904 (b) When building, for example, log lines, the code previously used a
1905 macro that called string_cat() twice, in order to add two strings. This is
1906 not really sufficiently general. Furthermore, there was one instance where
1907 it was actually wrong because one of the argument was used twice, and in
1908 one call a function was used. (As it happened, calling the function twice
1909 did not affect the overall behaviour.) The macro has been replaced by a
1910 function that can join an arbitrary number of extra strings onto a growing
1913 (c) The code for expansion conditions now uses a table and a binary chop
1914 instead of a serial search (which was left over from when there were very
1915 few conditions). Also, it now recognizes conditions like "pam" even when
1916 the relevant support is not compiled in: a suitably worded error message is
1917 given if an attempt is made to use such a condition.
1919 11. Added ${time_interval:xxxxx}.
1921 12. A bug was causing one of the ddress fields not to be passed back correctly
1922 from remote delivery subprocesses. The field in question was not being
1923 subsequently used, so this caused to problems in practice.
1925 13. Added new log selectors queue_time and deliver_time.
1927 14. Might have fixed a bug in maildirsizefile handling that threw up
1928 "unexpected character" debug warnings, and recalculated the data
1929 unnecessarily. In any case, I expanded the warning message to give more
1932 15. Added the message "Restricted characters in address" to the statements in
1933 the default ACL that block characters like @ and % in local parts.
1935 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
1936 Three changes have been made:
1938 (a) There was a serious bug; a negative response to MAIL caused the whole
1939 recipient domain to be cached as invalid, thereby blocking all messages
1940 to all local parts at the same domain, from all senders. This bug has
1941 been fixed. The domain is no longer cached after a negative response to
1942 MAIL if the sender used is not empty.
1944 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1947 (c) A new callout option, "use_sender" has been added for people who want
1948 the modified behaviour.
1954 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1957 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1958 indeed breaks things for older releases.
1960 3. Added additional logging to the case where there is a problem reading data
1961 from a filter that is running in a subprocess using a pipe, in order to
1962 try to track down a specific problem.
1964 4. Testing facility fudge: when running in the test harness and attempting
1965 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1966 getting "No route to host". Convert this to a timeout.
1968 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1971 6. Some OS don't have socklen_t but use size_t instead. This affects the
1972 fifth argument of getsockopt() amongst other things. This is now
1973 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1974 can be set for individual OS. I have set it for SunOS5, OSF1, and
1975 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1976 some earlier ones do not.
1978 7. Change 4.30/15 was not doing the test caselessly.
1980 8. The standard form for an IPv6 address literal was being rejected by address
1981 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1982 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1983 this, as well as the form without the "IPv6" on the front (but only when
1984 address literals are enabled, of course).
1986 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
1988 10. Exim crashed if a message with an empty sender address specified by -f
1989 encountered a router with an errors_to setting. This could be provoked only
1990 by a command such as
1994 where an empty string was supplied; "<>" did not hit this bug.
1996 11. Installed PCRE release 4.5.
1998 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1999 remained set. It is now erased.
2001 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2002 times from message ids (which are base 36 rather than the normal 62).
2004 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2005 were being counted as actual protocol errors, and logged if the log
2006 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2007 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2008 and DATA following a set of rejected RCPTs do not count as protocol errors.
2009 In other words, Exim assumes they were pipelined, though this may not
2010 actually be the case. Of course, in all cases the client gets an
2011 appropriate error code.
2013 15. If a lookup fails in an ACL condition, a message about the failure may
2014 be available; it is used if testing the ACL cannot continue, because most
2015 such messages specify what the cause of the deferral is. However, some
2016 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2017 that caused an old message to be retained and used if a later statement
2018 caused a defer, replacing the real cause of the deferral.
2020 16. If an IP address had so many PTR records that the DNS lookup buffer
2021 was not large enough to hold them, Exim could crash while trying to process
2022 the truncated data. It now detects and logs this case.
2024 17. Further to 4.21/58, another change has been made: if (and only if) the
2025 first line of a message (the first header line) ends with CRLF, a bare LF
2026 in a subsequent header line has a space inserted after it, so as not to
2027 terminate the header.
2029 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2030 unnecessarily, used atoi() instead of strtol(), and didn't check the
2031 termination when getting file sizes from file names by regex.
2033 19. Completely re-implemented the support for maildirsize files, in the light
2034 of a number of problems with the previous contributed implementation
2035 (4.30/29). In particular:
2037 . If the quota is zero, the maildirsize file is maintained, but no quota is
2040 . If the maildir directory does not exist, it is created before any attempt
2041 to write a maildirsize file.
2043 . The quota value in the file is just a cache; if the quota is changed in
2044 the transport, the new value overrides.
2046 . A regular expression is available for excluding directories from the
2049 20. The autoreply transport checks the characters in options that define the
2050 message's headers; it allows continued headers, but it was checking with
2051 isspace() after an embedded newline instead of explicitly looking for a
2054 21. If all the "regular" hosts to which an address was routed had passed their
2055 expiry times, and had not reached their retry times, the address was
2056 bounced, even if fallback hosts were defined. Now Exim should go on to try
2059 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
2060 equivalent code in the SMTP transport. Some hosts send humungous responses
2061 to HELO/EHLO, more than 1024 it seems.
2063 23. Refactoring: code in filter.c used (void *) for "any old type" but this
2064 gives compiler warnings in some environments. I've now done it "properly",
2067 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
2068 (because of problems with the built-in one) was declared to return uschar *
2069 instead of char *, causing compiler failure.
2071 25. Fixed a file descriptor leak when processing alias/forward files.
2073 26. Fixed a minor format string issue in dbfn.c.
2075 27. Typo in exim.c: ("dmbnz" for "dbmnz").
2077 28. If a filter file refered to $h_xxx or $message_headers, and the headers
2078 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2081 29. When a sender address is verified, it is cached, to save repeating the test
2082 when there is more than one recipient in a message. However, when the
2083 verification involves a callout, it is possible for different callout
2084 options to be set for different recipients. It is too complicated to keep
2085 track of this in the cache, so now Exim always runs a verification when a
2086 callout is required, relying on the callout cache for the optimization.
2087 The overhead is duplication of the address routing, but this should not be
2090 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2091 to be verified with callout=postmaster, and the main callout worked but the
2092 postmaster check failed, the verification correctly failed. However, if a
2093 subsequent RCPT command asked for sender verification *without* the
2094 postmaster check, incorrect caching caused this verification also to fail,
2097 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2098 it was not caching the DNS options (qualify_single, search_parents) that
2099 were used when the lookup failed. A subsequent lookup with different
2100 options therefore always gave the same answer, though there were cases
2101 where it should not have. (Example: a "domains = !$mx_any" option on a
2102 dnslookup router: the "domains" option is always processed without any
2103 widening, but the router might have qualify_single set.) Now Exim uses the
2104 cached value only when the same options are set.
2106 32. Added John Jetmore's "exipick" utility to the distribution.
2108 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2109 than a timeout (e.g. a certificate is required, and is not provided), an
2110 Exim server now closes the connection immediately. Previously it waited for
2111 the client to close - but if the client is SSL, it seems that they each
2112 wait for each other, leading to a delay before one of them times out.
2114 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2115 maintained 0.8.x compatibility because I don't think many are using it, and
2116 it is clearly obsolete.
2118 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2121 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2122 client certificate was expired. A simple patch fixes this, though I don't
2123 understand the full logic of why the verify callback is called multiple
2126 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2127 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2128 which causes problems with some clients (such as the Certicom SSL Plus
2129 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2130 disables the coutermeasure allowing Eudora to connect."
2132 38. Exim was not checking that a write() to a log file succeeded. This could
2133 lead to Bad Things if a log got too big, in particular if it hit a file
2134 size limit. Exim now panics and dies if it cannot write to a log file, just
2135 as it does if it cannot open a log file.
2137 39. Modified OS/Makefile-Linux so that it now contains
2139 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2141 The two -D definitions ensure that Exim is compiled with large file
2142 support, which makes it possible to handle log files that are bigger than
2145 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2146 instance) a domain was checked against a named list that involved a lookup,
2147 causing $domain_data to be set, then another domain was checked against the
2148 same list, then the first domain was re-checked, the value of $domain_data
2149 after the final check could be wrong. In particular, if the second check
2150 failed, it could be set empty. This bug probably also applied to
2153 41. The strip_trailing_dot option was not being applied to the address given
2154 with the -f command-line option.
2156 42. The code for reading a message's header from the spool was incrementing
2157 $received_count, but never initializing it. This meant that the value was
2158 incorrect (doubled) while delivering a message in the same process in which
2159 it was received. In the most common configuration of Exim, this never
2160 happens - a fresh exec is done - but it can happen when
2161 deliver_drop_privilege is set.
2163 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2164 it now includes up to 150 characters of the unexpected data in the log
2167 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2168 and building data strings. The size of both of these buffers was 10 000
2169 bytes - far larger than anybody would *ever* want, thought I. Needless to
2170 say, somebody hit the limit. I have increased the maximum line length to
2171 20 000 and the maximum data length of concatenated lines to 100 000. I have
2172 also fixed two bugs, because there was no checking on these buffers. Tsk,
2173 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2174 buffer is too small.
2176 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2177 lsearch lookups. Now it does.
2179 46. When parsing a route_list item in a manualroute router, a fixed-length
2180 buffer was used for the list of hosts. I made this 1024 bytes long,
2181 thinking that nobody would ever have a list of hosts that long. Wrong.
2182 Somebody had a whole pile of complicated expansion conditions, and the
2183 string was silently truncated, leading to an expansion error. It turns out
2184 that it is easier to change to an unlimited length (owing to other changes
2185 that have happened since this code was originally written) than to build
2186 structure for giving a limitation error. The length of the item that
2187 expands into the list of hosts is now unlimited.
2189 47. The lsearch lookup could not handle data where the length of text line was
2190 more than 4095 characters. Such lines were truncated, leading to shortened
2191 data being returned. It should now handle lines of any length.
2193 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2194 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2197 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2198 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2199 no longer happens in comment lines. A list of replacements is now placed
2200 at the head of all of the source files, except those whose only change is
2201 to replace PERL_COMMAND in the very first #! line.
2203 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2204 messages on the queue, with a bottom-up merge sort, using code contributed
2205 by Michael Haardt. This should make operations like -bp somewhat faster on
2206 large queues. It won't affect queue runners, except when queue_run_in_order
2209 51. Installed eximstats 1.31 in the distribution.
2211 52. Added support for SRV lookups to the dnslookup router.
2213 53. If an ACL referred to $message_body or $message_body_end, the value was not
2214 reset for any messages that followed in the same SMTP session.
2216 54. The store-handling optimization for building very long strings was not
2217 differentiating between the different store pools. I don't think this
2218 actually made any difference in practice, but I've tidied it.
2220 55. While running the routers to verify a sender address, $sender_address
2221 was still set to the sender address. This is wrong, because when routing to
2222 send a bounce to the sender, it would be empty. Therefore, I have changed
2223 it so that, while verifying a sender address, $sender_address is set to <>.
2224 (There is no change to what happens when verifying a recipient address.)
2226 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2227 target A or AAAA records (if not already returned) without resetting the
2228 qualify_single or search_parents options of the DNS resolver. These are
2229 inappropriate in this case because the targets of MX and SRV records must
2230 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2231 target that, when qualified, matched something in the local domain. These
2232 two options are now turned off when doing these lookups.
2234 57. It seems that at least some releases of Reiserfs (which does not have the
2235 concept of a fixed number of inodes) returns zero and not -1 for the
2236 number of available inodes. This interacted badly with check_spool_inodes,
2237 which assumed that -1 was the "no such thing" setting. What I have done is
2238 to check that the total number of inodes is greater than zero before doing
2239 the test of how many are available.
2241 58. When a "warn" ACL statement has a log_message modifier, the message is
2242 remembered, and not repeated. This is to avoid a lot of repetition when a
2243 message has many recipients that cause the same warning to be written.
2244 Howewer, Exim was preserving the list of already written lines for an
2245 entire SMTP session, which doesn't seem right. The memory is now reset if a
2246 new message is started.
2248 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2249 debugging output unless log_rewrite was also set.
2251 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2252 of (int)(handle) when we know that handle contains (void *)(-1).
2254 61. The Exim daemon panic-logs an error return when it closes the incoming
2255 connection. However "connection reset by peer" seems to be common, and
2256 isn't really an error worthy of noting specially, so that particular error
2259 62. When Exim is trying to find all the local interfaces, it used to panic and
2260 die if the ioctl to get the interface flags failed. However, it seems that
2261 on at least one OS (Solaris 9) it is possible to have an interface that is
2262 included in the list of interfaces, but for which you get a failure error
2263 for this call. This happens when the interface is not "plumbed" into a
2264 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2265 failure of the "get flags" call assumes that the interface is down.
2267 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2268 makes life easier for people who are doing arithmetic on fields extracted
2269 from dates, where you often get leading zeros that should not be
2270 interpreted as octal.
2272 64. Added qualify_domain to the redirect router, to override the global
2275 65. If a pathologically long header line contained very many addresses (the
2276 report of this problem mentioned 10 000) and each of them was rewritten,
2277 Exim could use up a very large amount of memory. (It kept on making new
2278 copies of the header line as it rewrote, and never released the old ones.)
2279 At the expense of a bit more processing, the header rewriting function has
2280 been changed so that it no longer eats memory in this way.
2282 66. The generation of the Received: header has been moved from the time that a
2283 message starts to be received, to the time that it finishes. The timestamp
2284 in the Received: header should now be very close to that of the <= log
2285 line. There are two side-effects of this change:
2287 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2288 logged header lines no longer include the local Received: line, because
2289 it has not yet been created. The same applies to a copy of the message
2290 that is returned to a non-SMTP sender when a message is rejected.
2292 (b) When a filter file is tested using -bf, no additional Received: header
2293 is added to the test message. After some thought, I decided that this
2296 This change does not affect the value of $received_for. It is still set
2297 after address rewriting, but before local_scan() is called.
2299 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2301 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2302 gave an unhelpful panic error message, and a defer error. I have managed to
2303 change this behaviour so that it now rejects any supplied certificate,
2304 which seems right, as the list of acceptable certificates is empty.
2306 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2307 gave an unhelpful defer error. I have not managed to make this reject any
2308 supplied certificates, but the error message it gives is "no certificate
2309 supplied", which is not helpful.
2311 70. exigrep's output now also includes lines that are not associated with any
2312 message, but which match the given pattern. Implemented by a patch from
2313 Martin Sluka, which also tidied up the Perl a bit.
2315 71. Recipient callout verification, like sender verification, was using <> in
2316 the MAIL FROM command. This isn't really the right thing, since the actual
2317 sender may affect whether the remote host accepts the recipient or not. I
2318 have changed it to use the actual sender in the callout; this means that
2319 the cache record is now keyed on a recipient/sender pair, not just the
2320 recipient address. There doesn't seem to be a real danger of callout loops,
2321 since a callout by the remote host to check the sender would use <>.
2322 [SEE ABOVE: changed after hitting problems.]
2324 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2325 temporary errors. However, in the case of such a code being given after
2326 the end of a data transmission (i.e. after ".") Exim was failing to write
2327 a retry record for the message. (Yes, there was some broken host that was
2328 actually sending 8xx at this point.)
2330 73. An unknown lookup type in a host list could cause Exim to panic-die when
2331 the list was checked. (An example that provoked this was putting <; in the
2332 middle of a list instead of at the start.) If this happened during a DATA
2333 ACL check, a -D file could be left lying around. This kind of configuration
2334 error no longer causes Exim to die; instead it causes a defer errror. The
2335 incident is still logged to the main and panic logs.
2337 74. Buglet left over from Exim 3 conversion. The message "too many messages
2338 in one connection" was written to the rejectlog but not the mainlog, except
2339 when address rewriting (yes!) was being logged.
2341 75. Added write_rejectlog option.
2343 76. When a system filter was run not as root (that is, when system_filter_user
2344 was set), the values of the $n variables were not being returned to the
2345 main process; thus, they were not subsequently available in the $sn
2348 77. Added +return_path_on_delivery log selector.
2350 78. A connection timeout was being treated differently from recipients deferred
2351 when testing hosts_max_try with a message that was older than the host's
2352 retry timeout. (The host should not be counted, thus allowing all hosts to
2353 be tried at least once before bouncing.) This may have been the cause of an
2354 occasionally reported bug whereby a message would remain on the queue
2355 longer than the retry timeout, but would be bounced if a delivery was
2356 forced. I say "may" because I never totally pinned down the problem;
2357 setting up timeout/retry tests is difficult. See also the next item.
2359 79. The ultimate address timeout was not being applied to errors that involved
2360 a combination of host plus message (for example, a timeout on a MAIL
2361 command). When an address resolved to a number of possible hosts, and they
2362 were not all tried for each delivery (e.g. because of hosts_max_try), a
2363 message could remain on the queue longer than the retry timeout.
2365 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2368 81. Fixed an obscure SMTP outgoing bug which required at least the following
2369 conditions: (a) there was another message waiting for the same server;
2370 (b) the server returned 5xx to all RCPT commands in the first message so
2371 that the message was not completed; (c) the server dropped the connection
2372 or gave a negative response to the RSET that Exim sends to abort the
2373 transaction. The observed case was a dropped connection after DATA that had
2374 been sent in pipelining mode. That is, the server had advertised PIPELINING
2375 but was not implementing it correctly. The effect of the bug was incorrect
2376 behaviour, such as trying another host, and this could lead to a crash.
2382 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2383 and daemon.c were passed as pointers to ints; they should have been
2384 pointers to socklen_t variables (which are typically unsigned ints).
2386 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2389 3. Fixed a really odd bug that affected only the testing scheme; patching a
2390 certain fixed string in the binary changed the value of another string that
2391 happened to be identical to the end of the original first string.
2393 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2394 name", it returns that address as the IP address. On some operating
2395 systems (e.g. Solaris), it also passes back the IP address string as the
2396 "host name". However, on others (e.g. Linux), it passes back an empty
2397 string. Exim wasn't checking for this, and was changing the host name to an
2398 empty string, assuming it had been canonicized.
2400 5. Although rare, it is permitted to have more than one PTR record for a given
2401 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2402 all the names associated with an address, because they do in Solaris.
2403 However, it seems that they do not in Linux for data that comes from the
2404 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2405 I found this out when I moved to a new Linux workstation and tried to run
2406 the Exim test suite.
2408 To get round this problem I have changed the code so that it now does its
2409 own call to the DNS to look up PTR records when searching for a host name.
2410 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2411 addresses that are only in /etc/hosts are still found.
2413 This behaviour is, however, controlled by an option called host_lookup_
2414 order, which defaults to "bydns:byaddr". If people want to use the other
2415 order, or indeed, just use one or the other means of lookup, they can
2416 specify it in this variable.
2418 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2419 some operating systems, this comes back from gethostbyaddr() as an empty
2420 string, and this is what Exim used to test for. However, it seems that in
2421 other systems, "." is yielded. Exim now tests for this case too.
2423 7. The values of check_spool_space and check_log_space are now held internally
2424 as a number of kilobytes instead of an absolute number of bytes. If a
2425 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2426 kilobyte. This means that much larger values can be stored.
2428 8. Exim monitor: an attempt to get the action menu when not actually pointing
2429 at a message produces an empty menu entitled "No message selected". This
2430 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2431 no entries in it ("Shell widget menu has zero width and/or height"). So I
2432 have added a single, blank menu entry in this case.
2434 9. Added ${quote_local_part.
2436 10. MIME decoding is now applied to the contents of Subject: header lines when
2439 11. Now that a reference to $sender_host_address automatically causes a reverse
2440 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2441 host lookup before query-style lookups in lists that might use this
2442 variable. This has therefore been abolished, and the "net-" prefix is no
2443 longer necessary for query-style lookups.
2445 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2446 have been a typo for LFLAGS, so it has been changed.
2448 13. The install script calls Exim with "-C /dev/null" in order to find the
2449 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2450 to be output. Howeve, since Exim outputs its version number before the
2451 error, it didn't break the script. It just looked ugly. I fixed this by
2452 always allowing "-C /dev/null" if the caller is root.
2454 14. Ignore overlarge ACL variable number when reading spool file - insurance
2455 against a later release with more variables having written the file.
2457 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2458 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2459 this, as well as the form without the "IPv6" on the front.
2461 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2462 OS/Makefile-Darwin file.
2464 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2465 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2467 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2468 variable. However, some OS use ints for inodes. I've added cast to long int
2469 to get rid of the compiler warning.
2471 19. I had forgotten to lock out "/../" in configuration file names when
2472 ALT_CONFIG_PREFIX was set.
2474 20. Routers used for verification do not need to specify transports. However,
2475 if such a router generated a host list, and callout was configured, Exim
2476 crashed, because it could not find a port number from the (non-existent)
2477 transport. It now assumes port 25 in this circumstance.
2479 21. Added the -t option to exigrep.
2481 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2482 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2483 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2484 them is set, LOOKUP_LSEARCH is forced.
2486 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2488 24. Added sender and host information to the "rejected by local_scan()" log
2489 line; previously there was no indication of these.
2491 25. Added .include_if_exists.
2493 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2494 Linux. It turns out that not all file systems support this. Apparently some
2495 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2496 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2497 not supported on the file descriptor, is now ignored when Exim is trying to
2498 sync a directory. This applies only to Linux.
2500 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2502 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2503 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2506 29. Added support for maildirsize files from supplied patch (modified a bit).
2508 30. The use of :fail: followed by an empty string could lead Exim to respond to
2509 sender verification failures with (e.g.):
2511 550 Verification failed for <xxx>
2512 550 Sender verify failed
2514 where the first response line was missing the '-' that indicates it is not
2515 the final line of the response.
2517 31. The loop for finding the name of the user that called Exim had a hardwired
2518 limit of 10; it now uses the value of finduser_retries, which is used for
2519 all other user lookups.
2521 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2524 33. Exim was neglecting to zero errno before one call of strtol() when
2525 expanding a string and expecting an integer value. On some systems this
2526 resulted in spurious "integer overflow" errors. Also, it was casting the
2527 result into an int without checking.
2529 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2530 did not work. The code looks as if it has *never* worked, though it appears
2531 to have been documented since at least releast 1.62. I have made it work.
2533 35. The "timeout_DNS" error in retry rules, also documented since at least
2534 1.62, also never worked. As it isn't clear exactly what this means, and
2535 clearly it isn't a major issue, I have abolished the feature by treating it
2536 as "timeout", and writing a warning to the main and panic logs.
2538 36. The display of retry rules for -brt wasn't always showing the error code
2541 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2542 timeout_connect_A, timeout_connect_MX.
2544 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2545 to the empty sender.
2547 39. The daemon was not analysing the content of -oX till after it had closed
2548 stderr and disconnected from the controlling terminal. This meant that any
2549 syntax errors were only noted on the panic log, and the return code from
2550 the command was 0. By re-arranging the code a little, I've made the
2551 decoding happen first, so such errors now appear on stderr, and the return
2552 code is 1. However, the actual setting up of the sockets still happens in
2553 the disconnected process, so errors there are still only recorded on the
2556 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2557 connections (as happens on some IP stacks) was logged at start up time as
2558 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2559 it from "IPv6 and IPv4", which means that two separate sockets are being
2562 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2563 says whether AF_INET or AF_INET6 was passed as an argument.
2565 42. Exiwhat output was messed up when time zones were included in log
2568 43. Exiwhat now gives more information about the daemon's listening ports,
2569 and whether -tls-on-connect was used.
2571 44. The "port" option of the smtp transport is now expanded.
2573 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2574 silently ignored. Now an error message is written to the main and panic
2577 46. There's a new ACL modifier called "logwrite" which writes to a log file
2578 as soon as it is encountered.
2580 47. Added $local_user_uid and $local_user_gid at routing time.
2582 48. Exim crashed when trying to verify a sender address that was being
2585 49. Exim was recognizing only a space character after ".include". It now also
2586 recognizes a tab character.
2588 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2589 extracting the relevant information from the specification. The man page no
2590 longer contains scrambled data for the -d option, and I've added a section
2591 at the front about calling Exim under different names.
2593 51. Added "extra_headers" argument to the "mail" command in filter files.
2595 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2598 53. Installed eximstats 1.29.
2600 54. Added transport_filter_timeout as a generic transport option.
2602 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2603 Cc: header lines. This was required by RFC 822, but it not required by RFC
2606 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2607 incoming messages that did not have them. Now it does so only if the
2608 message originates locally, that is, if there is no associated remote host
2609 address. When Resent- header lines are present, this applies to the Resent-
2610 lines rather than the non-Resent- lines.
2612 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2613 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2615 58. Messages for configuration errors now include the name of the main
2616 configuration file - useful now that there may be more than one file in a
2617 list (.included file names were always shown).
2619 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2620 for those rare installations that do not start the daemon as root or run it
2621 setuid root. I've cut out the call to initgroups() if the daemon is not
2624 60. The Exim user and group can now be bound into the binary as text strings
2625 that are looked up at the start of Exim's processing.
2627 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2629 62. Added $mailstore_basename variable.
2631 63. Installed patch to sieve.c from Michael Haardt.
2633 64. When Exim failed to open the panic log after failing to open the main log,
2634 the original message it was trying to log was written to stderr and debug
2635 output, but if they were not available (the usual case in production), it
2636 was lost. Now it is written to syslog before the two lines that record the
2637 failures to open the logs.
2639 65. Users' Exim filters run in subprocesses under the user's uid. It is
2640 possible for a "deliver" command or an alias in a "personal" command to
2641 provoke an address rewrite. If logging of address rewriting is configured,
2642 this fails because the process is not running as root or exim. There may be
2643 a better way of dealing with this, but for the moment (because 4.30 needs
2644 to be released), I have disabled address rewrite logging when running a
2645 filter in a non-root, non-exim process.
2651 1. The buildconfig auxiliary program wasn't quoting the value set for
2652 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2653 not defined. This bug was masked in 4.22 by the effect that was fixed in
2656 2. Some messages that were rejected after a message id was allocated were
2657 shown as "incomplete" by exigrep. It no longer does this for messages that
2658 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2660 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2661 have allow_domain_literals set, the ID did not get logged in the <= line.
2662 Domain literals are now always recognized in Message-ID: header lines.
2664 4. The first argument for a ${extract expansion item is the key name or field
2665 number. Leading and trailing spaces in this item were not being ignored,
2666 causing some misleading effects.
2668 5. When deliver_drop_privilege was set, single queue runner processes started
2669 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2670 same command in the process it spins off) were not dropping privilege.
2672 6. When the daemon running as "exim" started a queue runner, it always
2673 re-executed Exim in the spun-off process. This is a waste of effort when
2674 deliver_drop_privilege is set. The new process now just calls the
2675 queue-runner function directly.
2681 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2684 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2685 ignored. Though the use of -oP was forcing the writing of a pid file, it
2686 was always written to the default place.
2688 3. If the message "no IP address found for host xxxx" is generated during
2689 incoming verification, it is now followed by identification of the incoming
2690 connection (so you can more easily find what provoked it).
2692 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2694 5. Added some features to "harden" Exim a bit more against certain attacks:
2696 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2697 be put in Local/Makefile. This is like the never_users runtime option,
2698 but it cannot be overridden. The default setting is "root".
2700 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2701 prefix string with which any file named in a -C command line option
2704 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2705 is retained for -C and -D only if the caller of Exim is root. Without
2706 it, the exim user may also use -C and -D and retain privilege.
2708 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2709 command line option is disabled.
2711 6. Macro names set by the -D option must start with an upper case letter, just
2712 like macro names defined in the configuration file.
2714 7. Added "dereference=" facility to LDAP.
2716 8. Two instances of the typo "uknown" in the source files are fixed.
2718 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2719 the Configure-Makefile script screwed up while processing it.
2721 10. Incorporated PCRE 4.4.
2723 11. The SMTP synchronization check was not operating right at the start of an
2724 SMTP session. For example, it could not catch a HELO sent before the client
2725 waited for the greeting. There is now a check for outstanding input at the
2726 point when the greeting is written. Because of the duplex, asynchronous
2727 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2728 way, but not yet received, when the check is performed.
2730 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2731 on TCP/IP sockets, because this apparently causes some broken clients to
2734 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2735 unchanged) from the Cygwin maintainer.
2737 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2738 was supported instead of testing for mbx. Effectively a typo.
2740 15. The spa authenticator server code was not checking that the input it
2741 received was valid base64.
2743 16. The debug output line for the "set" modifier in ACLs was not showing the
2744 name of the variable that was being set.
2746 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2748 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2749 lookup on its own. Something else was needed to trigger the lookup. For
2750 example, a match in host_lookup or the need for a host name in a host list.
2751 Now, if $sender_host_name is referenced and the host name has not yet been
2752 looked up, a lookup is performed. If the lookup fails, the variable remains
2753 empty, and $host_lookup_failed is set to "1".
2755 19. Added "eqi" as a case-independent comparison operator.
2757 20. The saslauthd authentication condition could segfault if neither service
2758 nor realm was specified.
2760 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2761 error message that was logged was misleading, and incoming SMTP
2762 connections were dropped. The message is now more accurate, and temporary
2763 errors are given to SMTP connections.
2765 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2766 (except RSET) with a 421 error, until QUIT is received. However, it was
2767 failing to send a response to QUIT.
2769 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2770 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2771 ACL is now run after the helo_try_verify_hosts code.
2773 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2774 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2775 case-independent, so other case variants are also recognized). Apparently
2776 some systems use these upper case variants.
2778 25. If more than two messages were waiting for the same host, and a transport
2779 filter was specified for the transport, Exim sent two messages over the
2780 same TCP/IP connection, and then failed with "socket operation on non-
2781 socket" when it tried to send the third.
2783 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2785 27. The extern definition of crypt16() in expand.c was not being excluded when
2786 the OS had its own crypt16() function.
2788 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2789 as a preferred synonym for return_size_limit, both as an option and as an
2792 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2794 30. Changed the default configuration ACL to relax the local part checking rule
2795 for addresses that are not in any local domains. For these addresses,
2796 slashes and pipe symbols are allowed within local parts, but the sequence
2797 /../ is explicitly forbidden.
2799 31. SPA server authentication was not clearing the challenge buffer before
2802 32. log_message in a "warn" ACL statement was writing to the reject log as
2803 well as to the main log, which contradicts the documentation and doesn't
2804 seem right (because no rejection is happening). So I have stopped it.
2806 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2807 However, I am unable to do any testing of this.
2809 34. Fixed an infelicity in the appendfile transport. When checking directories
2810 for a mailbox, to see if any needed to be created, it was accidentally
2811 using path names with one or more superfluous leading slashes; tracing
2812 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2814 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2815 contents are added to the log line that is written for every discarded
2816 recipient. (Previously a log_message setting was ignored.)
2818 36. The ${quote: operator now quotes the string if it is empty.
2820 37. The install script runs exim in order to find its version number. If for
2821 some reason other than non-existence or emptiness, which it checks, it
2822 could not run './exim', it was installing it with an empty version number,
2823 i.e. as "exim-". This error state is now caught, and the installation is
2826 38. An argument was missing from the function that creates an error message
2827 when Exim fails to connect to the socket for saslauthd authentication.
2828 This could cause Exim to crash, or give a corrupted message.
2830 39. Added isip, isip4, and isip6 to ${if conditions.
2832 40. The ACL variables $acl_xx are now saved with the message, and can be
2833 accessed later in routers, transports, and filters.
2835 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2836 strings in the file are not string-expanded.
2838 42. If a MAIL command specified a SIZE value that was too large to fit into an
2839 int variable, the check against message_size_limit failed. Such values are
2840 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2841 day this will have to be increased, but I don't think I want to be around
2842 when emails are that large.
2849 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2850 iconv() is not standard in FreeBSD.
2852 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2853 IPv6 enabled. The observed symptom was a segmentation fault on return from
2854 the function os_common_find_running_interfaces() in src/os.c.
2856 3. In the check_special_case() function in daemon.c I had used "errno" as an
2857 argument name, which causes warnings on some systems. This was basically a
2858 typo, since it was named "eno" in the comments!
2860 4. The code that waits for the clock to tick (at a resolution of some fraction
2861 of a second) so as to ensure message-id uniqueness was always waiting for
2862 at least one whole tick, when it could have waited for less. [This is
2863 almost certainly not relevant at current processor speeds, where it is
2864 unlikely to ever wait at all. But we try to future-proof.]
2866 5. The function that sleeps for a time interval that includes fractions of a
2867 second contained a race. It did not block SIGALRM between setting the
2868 timer, and suspending (a couple of lines later). If the interval was short
2869 and the sigsuspend() was delayed until after it had expired, the suspension
2870 never ended. On busy systems this could lead to processes getting stuck for
2873 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2874 process, before it forks any delivery processes. The open lookup caching
2875 mechanism meant that the open file or database connection was passed into
2876 the delivery process. The problem was that delivery processes always tidy
2877 up cached lookup data. This could cause a problem for the next delivery
2878 process started by the queue runner, because the external queue runner
2879 process does not know about the closure. So the next delivery process
2880 still has data in the lookup cache. In the case of a file lookup, there was
2881 no problem because closing a file descriptor in a subprocess doesn't affect
2882 the parent. However, if the lookup was caching a connection to a database,
2883 the connection was closed, and the second delivery process was likely to
2884 see errors such as "PGSQL: query failed: server closed the connection
2885 unexpectedly". The problem has been fixed by closing all cached lookups
2886 in a queue runner before running a delivery process.
2888 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2889 seem to have the "const" qualifier which it has on other OS. I've
2892 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2893 *of the same type* (client or server) with the same public name that an
2894 error should be diagnosed.
2896 9. When Exim looked up a host name for an IP address, but failed to find the
2897 original IP address when looking up the host name (a safety check), it
2898 output the message "<ip address> does not match any IP for NULL", which was
2899 confusing, to say the least. The bug was that the host name should have
2900 appeared instead of "NULL".
2902 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
2903 user that is built into the binary, and the -C or -D options is used, root
2904 privilege is dropped before the configuration file is read. In addition,
2905 logging is switched to stderr instead of the normal log files. If the
2906 configuration then re-defines the Exim user, the unprivileged environment
2907 is probably not what is expected, so Exim logs a panic warning message (but
2910 However, if deliver_drop_privilege is set, the unprivileged state may well
2911 be exactly what is intended, so the warning has been cut out in that case,
2912 and Exim is allowed to try to write to its normal log files.
2918 1. smtp_return_error_details was not giving details for temporary sender
2919 or receiver verification errors.
2921 2. Diagnose a configuration error if two authenticators have the same public
2924 3. Exim used not to create the message log file for a message until the first
2925 delivery attempt. This could be confusing when incoming messages were held
2926 for policy or load reasons. The message log file is now created at the time
2927 the message is received, and an initial "Received" line is written to it.
2929 4. The automatically generated man page for command line options had a minor
2930 bug that caused no ill effects; however, a more serious problem was that
2931 the procedure for building the man page automatically didn't always
2932 operate. Consequently, release 4.20 contains an out-of-date version. This
2933 shouldn't happen again.
2935 5. When building Exim with embedded Perl support, the script that builds the
2936 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2937 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2939 6. The freeze_tell option was not being used for messages that were frozen on
2940 arrival, either by an ACL or by local_scan().
2942 7. Added the smtp_incomplete_transaction log selector.
2944 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2945 was accepting AUTH without a new EHLO.
2947 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2948 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2951 10. Logging of TCP/IP connections (when configured) now happens in the main
2952 daemon process instead of the child process, so that the TCP/IP connection
2953 count is more accurate (but it can never be perfect).
2955 11. The use of "drop" in a nested ACL was not being handled correctly in the
2956 outer ACL. Now, if condition failure induced by the nested "drop" causes
2957 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2958 or "require"), the connection is dropped.
2960 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2961 that yield "discard" can now be used with an "accept" or a "discard" verb,
2962 but an error is generated for any others (because I can't see a useful way
2963 to define what should happen).
2965 13. When an ACL is read dynamically from a file (or anywhere else), the lines
2966 are now processed in the same way as lines in the Exim configuration file.
2967 In particular, continuation lines are supported.
2969 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2971 15. Added -ti meaning -t -i.
2973 16. Check for letters, digits, hyphens, and dots in the names of dnslist
2974 domains, and warn by logging if others are found.
2976 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
2977 returned from GIFCONF when Exim is trying to find the list of interfaces on
2978 a host. The code in os.c has been modified to copy each ifreq to an aligned
2979 structure in all cases.
2981 Also, in some cases, the returned ifreq's were being copied to a 'struct
2982 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2983 means the last couple of bytes of an IPv6 address could be chopped if the
2984 ifreq contained only a normal sockaddr (14 bytes storage).
2986 18. Named domain lists were not supported in the hosts_treat_as_local option.
2987 An entry such as +xxxx was not recognized, and was treated as a literal
2990 19. Ensure that header lines added by a DATA ACL are included in the reject log
2991 if the ACL subsequently rejects the message.
2993 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
2994 MD5 (which is deprecated).
2996 21. When testing a filter file using -bf, Exim was writing a message when it
2997 took the sender from a "From " line in the message, but it was not doing so
2998 when it took $return_path from a Return-Path: header line. It now does.
3000 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3001 with a valid header line field name (a series of printing characters
3002 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3004 23. Changed "disc" in the source to "disk" to conform to the documentation and
3005 the book and for uniformity.
3007 24. Ignore Sendmail's -Ooption=value command line item.
3009 25. When execve() failed while trying to run a command in a pipe transport,
3010 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3011 could be confused with a return value of 69 from the command itself. This
3012 has been changed to 127, the value the shell returns if it is asked to run
3013 a non-existent command. The wording for the related log line suggests a
3014 non-existent command as the problem.
3016 26. If received_header_text expands to an empty string, do not add a Received:
3017 header line to the message. (Well, it adds a token one on the spool, but
3018 marks it "old" so that it doesn't get used or transmitted.)
3020 27. Installed eximstats 1.28 (addition of -nt option).
3022 28. There was no check for failure on the call to getsockname() in the daemon
3023 code. This can fail if there is a shortage of resources on the system, with
3024 ENOMEM, for example. A temporary error is now given on failure.
3026 29. Contrary to the C standard, it seems that in some environments, the
3027 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3028 program. Exim now does this explicitly; it affects the formatting of
3029 timestamps using strftime().
3031 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3032 complaints. I've now initialized all the variables, to avoid this.
3034 32. Header lines added by a system filter were not being "seen" during
3035 transport-time rewrites.
3037 33. The info_callback() function passed to OpenSSL is set up with type void
3038 (*)(SSL *, int, int), as described somewhere. However, when calling the
3039 function (actually a macro) that sets it up, the type void(*)() is
3040 expected. I've put in a cast to prevent warnings from picky compilers.
3042 34. If a DNS black list lookup found a CNAME record, but there were no A
3043 records associated with the domain it pointed at, Exim crashed.
3045 35. If a DNS black list lookup returned more than one A record, Exim ignored
3046 all but the first. It now scans all returned addresses if a particular IP
3047 value is being sought. In this situation, the contents of the
3048 $dnslist_value variable are a list of all the addresses, separated by a
3051 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
3052 to accept a host name and all its aliases if the forward lookup for any of
3053 them yielded the IP address of the incoming connection. Now it accepts only
3054 those names whose forward lookup yields the correct IP address. Any other
3055 names are discarded. This closes a loophole whereby a rogue DNS
3056 administrator could create reverse DNS records to break through a
3057 wildcarded host restriction in an ACL.
3059 37. If a user filter or a system filter that ran in a subprocess used any of
3060 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
3061 the wrong values were passed to the pipe command ($thisaddress had the
3062 value of $0, $0 had the value of $1, etc). This bug was introduced by
3063 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
3065 38. Improved the line breaking for long SMTP error messages from ACLs.
3066 Previously, if there was no break point between 40 and 75 characters, Exim
3067 left the rest of the message alone. Two changes have been made: (a) I've
3068 reduced the minimum length to 35 characters; (b) if it can't find a break
3069 point between 35 and 75 characters, it looks ahead and uses the first one
3070 that it finds. This may give the occasional overlong line, but at least the
3071 remaining text gets split now.
3073 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
3074 file descriptors might be low, and that setting 1000 would always raise it.
3075 It turns out that in some environments, the limit is already over 1000 and
3076 that lowering it causes trouble. So now Exim takes care not to decrease it.
3078 40. When delivering a message, the value of $return_path is set to $sender_
3079 address at the start of routing (routers may change the value). By an
3080 oversight, this default was not being set up when an address was tested by
3081 -bt or -bv, which affected the outcome if any router or filter referred to
3084 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3085 log only when "message" or "log_message" are set. However, if one of the
3086 conditions was an address verification, or a call to a nested ACL, the
3087 messages generated by the underlying test were being passed through. This
3088 no longer happens. The underlying message is available in $acl_verify_
3089 message for both "message" and "log_message" expansions, so it can be
3090 passed through if needed.
3092 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3093 new expansion $bh_ to give the encoded byte string without charset
3094 translation. Translation happens only if iconv() is available; HAVE_ICONV
3095 indicates this at build time. HEADERS_CHARSET gives the charset to
3096 translate to; headers_charset can change it in the configuration, and
3097 "headers charset" can change it in an individual filter file.
3099 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3100 that creates RFC 2047 encoded "words" labels them as that charset instead
3101 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3102 expansion operator; (ii) when Exim creates a From: line for a local
3103 message; (iii) when a header line is rewritten to include a "phrase" part.
3105 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3106 buggy, causing it to skip the first lines of messages whose message ID
3107 ended in 'D'. This would not have bitten before Exim release 4.14, because
3108 message IDs were unlikely to end in 'D' before then. The effect was to have
3109 incorrect size information for certain domains.
3111 45. #include "config.h" was missing at the start of the crypt16.c module. This
3112 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3115 46. If there was a timeout during a "random" callout check, Exim treated it as
3116 a failure of the random address, and carried on sending RSET and the real
3117 address. If the delay was just some slowness somewhere, the response to the
3118 original RCPT would be taken as a response to RSET and so on, causing
3119 mayhem of various kinds.
3121 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3122 when I implemented it. It didn't allow for the fact that some option values
3123 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3124 the right test for positive values.
3126 48. Domain names in DNS records are case-independent. Exim always looks them up
3127 in lower case. Some resolvers return domain names in exactly the case they
3128 appear in the zone file, that is, they may contain uppercase letters. Not
3129 all resolvers do this - some return always lower case. Exim was treating a
3130 change of case by a resolver as a change of domain, similar to a widening
3131 of a domain abbreviation. This triggered its re-routing code and so it was
3132 trying to route what was effectively the same domain again. This normally
3133 caused routing to fail (because the router wouldn't handle the domain
3134 twice). Now Exim checks for this case specially, and just changes the
3135 casing of the domain that it ultimately uses when it transmits the message
3138 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3141 50. If a filter generated a file delivery with a non-absolute name (possible if
3142 no home directory exists for the router), the forbid_file option was not
3145 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3146 the existing equality matching.
3148 52. Exim was using ints instead of ino_t variables in some places where it was
3149 dealing with inode numbers.
3151 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3152 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3153 called TMPDIR, and if it finds it is different, it changes its value.
3155 54. The smtp_printf() function is now made available to local_scan() so
3156 additional output lines can be written before returning. There is also an
3157 smtp_fflush() function to enable the detection of a dropped connection.
3158 The variables smtp_input and smtp_batched_input are exported to
3161 55. Changed the default runtime configuration: the message "Unknown user"
3162 has been removed from the ACL, and instead placed on the localuser router,
3163 using the cannot_route_message feature. This means that any verification
3164 failures that generate their own messages won't get overridden. Similarly,
3165 the "Unrouteable address" message that was in the ACL for unverifiable
3166 relay addresses has also been removed.
3168 56. Added hosts_avoid_esmtp to the smtp transport.
3170 57. The exicyclog script was not checking for the esoteric option
3171 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3172 will work only if exicyclog is run under the appropriate euid.
3174 58. Following a discussion on the list, the rules by which Exim recognises line
3175 endings on incoming messages have been changed. The -dropcr and drop_cr
3176 options are now no-ops, retained only for backwards compatibility. The
3177 following line terminators are recognized: LF CRLF CR. However, special
3178 processing applies to CR:
3180 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3181 nor a local message in the state where . is a terminator.
3183 (ii) If a bare CR is encountered in a header line, an extra space is added
3184 after the line terminator so as not to end the header. The reasoning
3185 behind this is that bare CRs in header lines are most likely either
3186 to be mistakes, or people trying to play silly games.
3188 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3189 was being incorrectly given as 18 bytes larger than it should have been.
3190 This is a VOB (very old bug).
3192 60. This may never have affected anything current, but just in case it has:
3193 When the local host is found other than at the start of a list of hosts,
3194 the local host, those with the same MX, and any that follow, are discarded.
3195 When the list in question was part of a longer list of hosts, the following
3196 hosts (not currently being processed) were also being discarded. This no
3197 longer happens. I'm not sure if this situation could ever has previously
3200 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3203 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3204 header. This is something that is recommended in a new Internet Draft, and
3205 is something that is documented as being done by Sendmail. There are two
3206 possible values. For messages generated by the autoreply transport, Exim
3209 Auto-Submitted: auto-replied
3211 whereas for all other generated messages (e.g. bounces) it adds
3213 Auto-Submitted: auto-generated
3215 63. The "personal" condition in filters now includes a test for the
3216 Auto-Submitted: header. If it contains the string "auto-" the message it
3217 not considered personal.
3219 64. Added rcpt_include_affixes as a generic transport option.
3221 65. Added queue_only_override (default true).
3223 66. Added the syslog_duplication option.
3225 67. If what should have been the first header line of a message consisted of
3226 a space followed by a colon, Exim was mis-interpreting it as a header line.
3227 It isn't of course - it is syntactically invalid and should therefore be
3228 treated as the start of the message body. The misbehaviour could have
3229 caused a number of strange effects, including loss of data in subsequent
3230 header lines, and spool format errors.
3232 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3233 client host had authenticated. This control can now be exercised by an ACL
3234 for more flexibility.
3236 69. By default, callouts do not happen when testing with -bh. There is now a
3237 variant, -bhc, which does actually run the callout code, including
3238 consulting and updating the callout cache.
3240 70. Added support for saslauthd authentication, courtesy of Alexander
3243 71. If statvfs() failed on the spool or log directories while checking their
3244 size for availability, Exim confusingly gave the error "space shortage".
3245 Furthermore, in debugging mode it crashed with a floating point exception.
3246 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3247 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3248 serious problem, Exim now writes to the main and panic logs when this
3249 happens, with details of the failure. It then refuses to accept the
3250 incoming message, giving the message "spool directory problem" or "log
3251 directory problem" with a 421 code for SMTP messages.
3253 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3254 0, 1, and 2 exist, because some OS complain for execs without them (see
3255 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3256 descriptors. However, the code omitted to check that the open succeeded,
3257 causing mysterious errors if for some reason the permissions on /dev/null
3258 got screwed. Now Exim writes a message to the main and panic logs, and
3259 bombs out if it can't open /dev/null.
3261 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3262 interact so that it is all more flexible. It is supposed to remain
3263 backwards compatible. Also added extra_local_interfaces.
3265 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3266 to bomb out with an assertion failure - to the client this appears as a
3267 connection drop. This problem occurs in the part of the code that was taken
3268 from the Samba project. Fortunately, the assertion is in a very simple
3269 function, so I have fixed this by reproducing the function inline in the
3270 one place where it is called, and arranging for authentication to fail
3271 instead of killing the process with assert().
3273 75. The SPA client code was not working when the server requested OEM rather
3274 than Unicode encoding.
3276 76. Added code to make require_files with a specific uid setting more usable in
3277 the case where statting the file as root fails - usually a non-root-mounted
3278 NFS file system. When this happens and the failure is EACCES, Exim now
3279 forks a subprocess and does the per-uid checking as the relevant uid.
3281 77. Added process_log_path.
3283 78. If log_file_path was not explicitly set, a setting of check_log_space or
3284 check_log_inodes was ignored.
3286 79. If a space check for the spool or log partitions fails, the incident is now
3287 logged. Of course, in the latter case the data may get lost...
3289 80. Added the %p formatting code to string_format() so that it can be used to
3290 print addresses in debug_print(). Adjusted all the address printing in the
3291 debugging in store.c to use %p rather than %d.
3293 81. There was a concern that a line of code in smtp_in.c could overflow a
3294 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3295 initially expressed, the concern was not well-founded, because trailing
3296 spaces are removed early. However, if the trailing spaces were followed by
3297 a NULL, they did not get removed, so the overflow was possible. Two fixes
3300 (a) I re-wrote the offending code in a cleaner fashion.
3301 (b) If an incoming SMTP command contains a NULL character, it is rejected
3304 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3305 runs initgroups(), so that if the Exim user is in any additional groups,
3306 they will be used during message reception.
3312 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob