1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.189 2005/08/02 08:25:45 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.
38 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
40 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
41 command itself ended in error, the underlying message about the transport
42 filter timeout was being overwritten with the pipe command error. Now the
43 underlying error message should be appended to the second error message.
45 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
47 PH/02 Reduce the amount of output that "make" produces by default. Full output
48 can still be requested.
50 PH/03 The warning log line about a condition test deferring for a "warn" verb
51 was being output only once per connection, rather than after each
52 occurrence (because it was using the same function as for successful
53 "warn" verbs). This seems wrong, so I have changed it.
55 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
56 it should not have, which might have caused a crash in the right
57 circumstances, but probably never did.
59 PH/04 Installed a modified version of Tony Finch's patch to make submission
60 mode fix the return path as well as the Sender: header line, and to
61 add a /name= option so that you can make the user's friendly name appear
64 TF/03 Added the control = fakedefer ACL modifier.
66 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
67 Mark Lowes for thorough testing.
69 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
71 TK/03 Merged latest SRS patch from Miles Wilton.
73 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
74 with the definition in sysexits.h (which is #included earlier).
75 Fortunately, Exim does not actually use EX_OK. The code used to try to
76 preserve the sysexits.h value, by assumimg that macro definitions were
77 scanned for macro replacements. I have been disabused of this notion,
78 so now the code just undefines EX_OK before #including unistd.h.
80 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
81 in the smtp transport. When a block could not be written in a single
82 write() function, the timeout was being re-applied to each part-write.
83 This seems wrong - if the receiver was accepting one byte at a time it
84 would take for ever. The timeout is now adjusted when this happens. It
85 doesn't have to be particularly precise.
87 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
88 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
90 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
91 without a domain if the check to <postmaster@domain> fails.
93 SC/01 Eximstats: added -xls and the ability to specify output files
94 (patch written by Frank Heydlauf).
96 SC/02 Eximstats: use FileHandles for outputing results.
98 SC/03 Eximstats: allow any combination of xls, txt, and html output.
100 SC/04 Eximstats: fixed display of large numbers with -nvr option
102 SC/05 Eximstats: fixed merging of reports with empty tables.
104 SC/06 Eximstats: added the -include_original_destination flag
106 SC/07 Eximstats: removed tabs and trailing whitespace.
108 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
110 TK/06 MBOX spool code: Add real "From " MBOX separator line
111 so the .eml file is really in mbox format (even though
112 most programs do not really care). Patch from Alex Miller.
114 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
115 The latter is generated from $received_to and is only set if the
116 message has one envelope recipient. SA can use these headers,
117 obviously out-of-the-box. Patch from Alex Miller.
119 PH/08 The ${def test on a variable was returning false if the variable's
120 value was "0", contrary to what the specification has always said!
121 The result should be true unless the variable is empty.
123 PH/09 The syntax error of a character other than { following "${if
124 def:variable_name" (after optional whitespace) was not being diagnosed.
125 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
126 accidental colon was present, for example, could give incorrect results.
128 PH/10 Tidied the code in a number of places where the st_size field of a stat()
129 result is used (not including appendfile, where other changes are about
132 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
133 This involved changing a lot of size variables from int to off_t. It
134 should work with maildirs and everything.
136 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
137 spamd dying while we are connected to it.
139 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
142 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
143 function for BDB 4.3.
145 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
147 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
148 the sources for PCRE have been re-arranged and more files are now
151 PH/15 The code I had for printing potentially long long variables in PH/11
152 above was not the best (it lost precision). The length of off_t variables
153 is now inspected at build time, and an appropriate printing format (%ld
154 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
155 to be "long long int" or "long int". This is needed for the internal
156 formatting function string_vformat().
158 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
159 the configuration file to be ":syslog", then the script "guesses" where
160 the logs files are, rather than using the compiled in default. In our
161 case the guess is not the same as the compiled default, so the script
162 suddenly stopped working when I started to use syslog. The patch checks
163 to see if log_file_path is "". If so, it attempts to read it from exim
164 with no configuration file to get the compiled in version, before it
165 falls back to the previous guessing code."
167 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
168 implementing BATV in an Exim configuration. See NewStuff for the gory
171 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
172 Makefile that are specific to HP-UX.
174 PH/18 If the "use_postmaster" option was set for a recipient callout together
175 with the "random" option, the postmaster address was used as the MAIL
176 FROM address for the random test, but not for the subsequent recipient
177 test. It is now used for both.
179 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
180 patch removes a few documentation additions to RFC 3028, because the
181 latest draft now contains them. It adds the new en;ascii-case comparator
182 and a new error check for 8bit text in MIME parts. Comparator and
183 require names are now matched exactly. I enabled the subaddress
184 extension, but it is not well tested yet (read: it works for me)."
186 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
187 rework some of the code of TK/09 above to avoid the hardwired use of
188 "%lld" and "long long". Replaced the call to snprintf() with a call to
191 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
192 records point to non-existent hosts", "retry timeout exceeded", and
193 "retry time not reached for any host after a long failure period".
195 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
196 experimental DomainKeys support:
198 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
199 (2) On an error such as an illegally used "control", the wrong name for
200 the control was given.
202 These problems did NOT occur unless DomainKeys support was compiled.
204 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
206 PH/24 Added ${if match_ip condition.
208 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
209 databases so that it will be absolutely obvious if a crash occurs in the
210 DB library. This is a regular occurrence (often caused by mis-matched
213 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
214 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
215 picked up on a user's system that detects such things. There doesn't seem
216 to be a gcc warning option for this - only an attribute that has to be
217 put on the function's prototype. It seems that in Fedora Core 4 they have
218 set this on a number of new functions. No doubt there will be more in due
221 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
222 specify a transport. However, if an address that was verified by such a
223 router was the subject of a callout, Exim crashed because it tried to
224 read the rcpt_include_affixes from the non-existent transport. Now it
225 just assumes that the setting of that option is false. This bug was
226 introduced by 4.51/PH/31.
228 PH/28 Changed -d+all to exclude +memory, because that information is very
229 rarely of interest, but it makes the output a lot bigger. People tend to
230 do -d+all out of habit.
232 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
233 code in os-type was giving problems when libc.so lives in lib64, like on
236 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
237 aren't the modern standard, and it seems that some systems' include files
238 don't always have them. Exim was already checking for some of the newer
239 ones like T_AAAA, and defining it itself. I've added checks for all the
240 record types that Exim uses.
242 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
243 not automatically generating a new one, as it is supposed to. This
244 prevented TLS from working. If the file did exist, but contained invalid
245 data, a new version was generated, as expected. It was only the case of a
246 non-existent file that was broken.
248 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
249 with a change in libdomainkeys > 0.64.
251 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
252 from DNS. If the selector record carries the flag, it now has
253 precedence over the domain-wide flag.
255 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
257 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
258 the use of a port name that isn't defined in /etc/services) occurred, the
259 message was deferred as in a normal delivery, and thus remained on the
260 spool, instead of being failed because of the mua_wrapper setting. This
261 is now fixed, and I tidied up some of the mua_wrapper messages at the
264 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
265 the messages in a hash of arrays rather than using individual hashes.
266 This is a bit cleaner and results in dramatic memory savings, albeit
267 at a slight CPU cost.
269 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
270 as requested by Marc Sherman.
272 SC/10 Eximstats: added histograms for user specified patterns as requested
275 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
277 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
278 fopen() in the content-scanning modules that did not already have it.
284 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
285 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
287 TK/02 Fix ACL "control" statement not being available in MIME ACL.
289 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
291 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
292 to test Sieve filters that use "vacation".
294 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
295 that changes the way the GnuTLS parameters are stored in the cache file.
296 The new format can be generated externally. For backward compatibility,
297 if the data in the cache doesn't make sense, Exim assumes it has read an
298 old-format file, and it generates new data and writes a new file. This
299 means that you can't go back to an older release without removing the
302 PH/03 A redirect router that has both "unseen" and "one_time" set does not
303 work if there are any delivery delays because "one_time" forces the
304 parent to be marked "delivered", so its unseen clone is never tried
305 again. For this reason, Exim now forbids the simultaneous setting of
308 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
309 redirected to themselves ("homonym" addresses). Read the long ChangeLog
310 entry if you want to know the details. The fix, however, neglected to
311 consider the case when local delivery batching is involved. The test for
312 "previously delivered" was not happening when checking to see if an
313 address could be batched with a previous (undelivered) one; under
314 certain circumstances this could lead to multiple deliveries to the same
317 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
318 in its include files, and this causes problems building Exim.
320 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
321 header_syntax) but Exim was just ignoring anything given after a slash.
322 In particular, this caused confusion with an attempt to use "verify =
323 reverse_host_lookup/defer_ok". An error is now given when options are
324 supplied for verify items that do not have them. (Maybe reverse_host_
325 lookup should have a defer_ok option, but that's a different point.)
327 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
328 defined by RFC 821) to 2048, because there were problems with some AUTH
329 commands, and RFC 1869 says the size should be increased for extended
330 SMTP commands that take arguments.
332 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
335 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
336 "unknown" error; now it says that the functionality isn't in the binary.
338 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
339 an address' error message when a string expansion fails (syntax or
340 whatever). Otherwise the password may appear in the log. Following change
341 PH/42 below, there is no longer a chance of it appearing in a bounce
344 PH/11 Installed exipick version 20050225.0 from John Jetmore.
346 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
347 of its addresses was ever tried. (Bugzilla bug #2.)
349 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
350 the result incorrectly in the debug output. (It correctly added a newline
351 to what was transported.)
353 TF/01 Added $received_time.
355 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
356 commented out examples of how to interface to a virus scanner and to
357 SpamAssassin. Also added commented examples of av_scanner and
358 spamd_address settings.
360 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
361 and controls are allowed in which ACLs. There were a couple of minor
362 errors. Some of the entries in the conditions table (which is a table of
363 where they are NOT allowed) were getting very unwieldy; rewrote them as a
364 negation of where the condition IS allowed.
366 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
368 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
369 header file does not have a version number, so I've had to invent a new
370 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
371 API. The code is untested by me (my Linux distribution still has 0.3.2 of
372 radiusclient), but it was contributed by a Radius user.
374 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
375 files or directories, for OpenSSL.
377 PH/19 When an Exim process that is running as root has to create an Exim log
378 file, it does so in a subprocess that runs as exim:exim so as to get the
379 ownership right at creation (otherwise, other Exim processes might see
380 the file with the wrong ownership). There was no test for failure of this
381 fork() call, which would lead to the process getting stuck as it waited
382 for a non-existent subprocess. Forks do occasionally fail when resources
383 run out. I reviewed all the other calls to fork(); they all seem to check
386 PH/20 When checking for unexpected SMTP input at connect time (before writing
387 the banner), Exim was not dealing correctly with a non-positive return
388 from the read() function. If the client had disconnected by this time,
389 the result was a log entry for a synchronization error with an empty
390 string after "input=" when read() returned zero. If read() returned -1
391 (an event I could not check), uninitialized data bytes were printed.
392 There were reports of junk text (parts of files, etc) appearing after
395 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
397 PH/22 Added support for macro redefinition, and (re)definition in between
398 driver and ACL definitions.
400 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
401 forgetting to use the resulting value; it was using the unexpanded value.
403 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
404 hadn't been configured. The fix is from Juergen Kreileder, who
405 understands it better than I do:
407 "Here's what I see happening with three configured cyrus_sasl
408 authenticators configured (plain, login, cram-md5):
410 On startup auth_cyrus_sasl_init() gets called for each of these.
411 This means three calls to sasl_listmech() without a specified mech_list.
412 => SASL tests which mechs of all available mechs actually work
413 => three warnings about OTP not working
414 => the returned list contains: plain, login, cram-md5, digest-md5, ...
416 With the patch, sasl_listmech() also gets called three times. But now
417 SASL's mech_list option is set to the server_mech specified in the the
418 authenticator. Or in other words, the answer from sasl_listmech()
419 gets limited to just the mech you're testing for (which is different
421 => the return list contains just 'plain' or 'login', 'cram-md5' or
422 nothing depending on the value of ob->server_mech.
424 I've just tested the patch: Authentication still works fine,
425 unavailable mechs specified in the exim configuration are still
426 caught, and the auth.log warnings about OTP are gone."
428 PH/25 When debugging is enabled, the contents of the command line are added
429 to the debugging output, even when log_selector=+arguments is not
432 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
433 answer is "GNU", and only if the return is "GNU/something" is the answer
436 PH/27 $acl_verify_message is now set immediately after the failure of a
437 verification in an ACL, and so is available in subsequent modifiers. In
438 particular, the message can be preserved by coding like this:
440 warn !verify = sender
441 set acl_m0 = $acl_verify_message
443 Previously, $acl_verify_message was set only while expanding "message"
444 and "log_message" when a very denied access.
446 PH/28 Modified OS/os.c-Linux with
448 -#ifndef OS_LOAD_AVERAGE
449 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
451 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
452 nomenclature these days.)
454 PH/29 Installed patch from the Sieve maintainer that adds the options
455 sieve_useraddress and sieve_subaddress to the redirect router.
457 PH/30 In these circumstances:
458 . Two addresses routed to the same list of hosts;
459 . First host does not offer TLS;
460 . First host accepts first address;
461 . First host gives temporary error to second address;
462 . Second host offers TLS and a TLS session is established;
463 . Second host accepts second address.
464 Exim incorrectly logged both deliveries with the TLS parameters (cipher
465 and peerdn, if requested) that were in fact used only for the second
468 PH/31 When doing a callout as part of verifying an address, Exim was not paying
469 attention to any local part prefix or suffix that was matched by the
470 router that accepted the address. It now behaves in the same way as it
471 does for delivery: the affixes are removed from the local part unless
472 rcpt_include_affixes is set on the transport.
474 PH/32 Add the sender address, as F=<...>, to the log line when logging a
475 timeout during the DATA phase of an incoming message.
477 PH/33 Sieve envelope tests were broken for match types other than :is. I have
478 applied a patch sanctioned by the Sieve maintainer.
480 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
481 the uid or gid is negative. A case of a negative gid caused this to be
482 noticed. The fix allows for either to be negative.
484 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
485 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
488 PH/36 The change PH/12 above was broken. Fixed it.
490 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
491 the grounds that routing the same address twice would always produce the
492 same answer. This might have been true once, but it is certainly no
493 longer true now. Routing a child address may depend on the previous
494 routing that produced that child. Some complicated redirection strategies
495 went wrong when messages had multiple recipients, and made Exim's
496 behaviour dependent on the order in which the addresses were given.
498 I have moved the duplicate checking until after the routing is complete.
499 Exim scans the addresses that are assigned to local and remote
500 transports, and removes any duplicates. This means that more work will be
501 done, as duplicates will always all be routed, but duplicates are
502 presumably rare, so I don't expect this is of any significance.
504 For deliveries to pipes, files, and autoreplies, the duplicate checking
505 still happens during the routing process, since they are not going to be
508 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
509 It corrects a timeout issue with spamd. This is Ian's comment: "The
510 background is that sometimes spamd either never reads data from a
511 connection it has accepted, or it never writes response data. The exiscan
512 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
513 blindly assumes that writes won't block so it may never time out."
515 PH/39 Allow G after quota size as well as K and M.
517 PH/40 The value set for $authenticated_id in an authenticator may not contain
518 binary zeroes or newlines because the value is written to log lines and
519 to spool files. There was no check on this. Now the value is run through
520 the string_printing() function so that such characters are converted to
521 printable escape sequences.
523 PH/41 $message_linecount is a new variable that contains the total number of
524 lines in the message. Compare $body_linecount, which is the count for the
527 PH/42 Exim no longer gives details of delivery errors for specific addresses in
528 bounce and delay warning messages, except in certain special cases, which
531 (a) An SMTP error message from a remote host;
532 (b) A message specified in a :fail: redirection;
533 (c) A message specified in a "fail" command in a system filter;
534 (d) A message specified in a FAIL return from the queryprogram router;
535 (e) A message specified by the cannot_route_message router option.
537 In these cases only, Exim does include the error details in bounce and
538 warning messages. There are also a few cases where bland messages such
539 as "unrouteable address" or "local delivery error" are given.
541 PH/43 $value is now also set for the "else" part of a ${run expansion.
543 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
544 being worked on, but at least Exim now implements the latest version to
547 PH/45 In a pipe transport, although a timeout while waiting for the pipe
548 process to complete was treated as a delivery failure, a timeout while
549 writing the message to the pipe was logged, but erroneously treated as a
550 successful delivery. Such timeouts include transport filter timeouts. For
551 consistency with the overall process timeout, these timeouts are now
552 treated as errors, giving rise to delivery failures by default. However,
553 there is now a new Boolean option for the pipe transport called
554 timeout_defer, which, if set TRUE, converts the failures into defers for
555 both kinds of timeout. A transport filter timeout is now identified in
558 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
559 systems where "make" and "gmake" are different, calling "gmake" at top
560 level broke things. I've arranged for the value of $(MAKE) to be passed
561 from the Makefile to this script so that it can call the same version of
565 A note about Exim versions 4.44 and 4.50
566 ----------------------------------------
568 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
569 changes of various kinds. As a consequence, a big documentation update was
570 needed. This delayed the release for rather longer than seemed good, especially
571 in the light of a couple of (minor) security issues. Therefore, the changes
572 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
573 release. So 4.44 and 4.50 are in effect two different branches that both start
576 I have left the 4.50 change log unchanged; it contains all the changes since
577 4.43. The change log for 4.44 is below; many of its items are identical to
578 those for 4.50. This seems to be the most sensible way to preserve the
579 historical information.
585 1. Minor wording change to the doc/README.SIEVE file.
587 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
588 computation of the current number of files was incorrect.
590 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
591 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
594 4. Give more explanation in the error message when the command for a transport
595 filter fails to execute.
597 5. There are several places where Exim runs a non-Exim command in a
598 subprocess. The SIGUSR1 signal should be disabled for these processes. This
599 was being done only for the command run by the queryprogram router. It is
600 now done for all such subprocesses. The other cases are: ${run, transport
601 filters, and the commands run by the lmtp and pipe transports.
603 6. Added CONFIGURE_GROUP build-time option.
605 7. Some older OS have a limit of 256 on the maximum number of file
606 descriptors. Exim was using setrlimit() to set 1000 as a large value
607 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
608 systems. I've change it so that if it can't get 1000, it tries for 256.
610 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
611 was an oversight, and furthermore, ever since the addition of extra
612 controls (e.g. 4.43/32), the checks on when to allow different forms of
613 "control" were broken. There should now be diagnostics for all cases when a
614 control that does not make sense is encountered.
616 9. Added the /retain_sender option to "control=submission".
618 10. $recipients is now available in the predata ACL (oversight).
620 11. Tidy the search cache before the fork to do a delivery from a message
621 received from the command line. Otherwise the child will trigger a lookup
622 failure and thereby defer the delivery if it tries to use (for example) a
623 cached ldap connection that the parent has called unbind on.
625 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
626 of $address_data from the recipient verification was clobbered by the
629 13. The value of address_data from a sender verification is now available in
630 $sender_address_data in subsequent conditions in the ACL statement.
632 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
634 15. Added a new option "connect=<time>" to callout options, to set a different
637 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
638 was its contents. (It was OK if the option was not defined at all.)
640 17. A "Completed" log line is now written for messages that are removed from
641 the spool by the -Mrm option.
643 18. New variables $sender_verify_failure and $recipient_verify_failure contain
644 information about exactly what failed.
646 19. Added -dd to debug only the daemon process.
648 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
649 handles timeouts, both on the server side and network timeouts. Renamed the
650 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
652 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
653 It is now set to "smtps".
655 22. $host_address is now set to the target address during the checking of
658 23. When checking ignore_target_hosts for an ipliteral router, no host name was
659 being passed; this would have caused $sender_host_name to have been used if
660 matching the list had actually called for a host name (not very likely,
661 since this list is usually IP addresses). A host name is now passed as
664 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
665 code that specifies a non-restarting handler (typically sigaction() in
666 modern systems) in an attempt to fix a rare and obscure crash bug.
668 25. Narrowed the window for a race in the daemon that could cause it to ignore
669 SIGCHLD signals. This is not a major problem, because they are used only to
670 wake it up if nothing else does.
672 26. A malformed maildirsize file could cause Exim to calculate negative values
673 for the mailbox size or file count. Odd effects could occur as a result.
674 The maildirsize information is now recalculated if the size or filecount
677 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
678 support for a long time. Removed HAVE_SYS_VFS_H.
680 28. Installed the latest version of exipick from John Jetmore.
682 29. In an address list, if the pattern was not a regular expression, an empty
683 subject address (from a bounce message) matched only if the pattern was an
684 empty string. Non-empty patterns were not even tested. This was the wrong
685 because it is perfectly reasonable to use an empty address as part of a
686 database query. An empty address is now tested by patterns that are
687 lookups. However, all the other forms of pattern expect the subject to
688 contain a local part and a domain, and therefore, for them, an empty
689 address still always fails if the pattern is not itself empty.
691 30. Exim went into a mad DNS loop when attempting to do a callout where the
692 host was specified on an smtp transport, and looking it up yielded more
695 31. Re-factored the code for checking spool and log partition space into a
696 function that finds that data and another that does the check. The former
697 is then used to implement four new variables: $spool_space, $log_space,
698 $spool_inodes, and $log_inodes.
700 32. The RFC2047 encoding function was originally intended for short strings
701 such as real names; it was not keeping to the 75-character limit for
702 encoded words that the RFC imposes. It now respects the limit, and
703 generates multiple encoded words if necessary. To be on the safe side, I
704 have increased the buffer size for the ${rfc2047: expansion operator from
707 33. It is now permitted to omit both strings after an "if" condition; if the
708 condition is true, the result is "true". As before, when the second string
709 is omitted, a false condition yields an empty string. This makes it less
710 cumbersome to write custom ACL and router conditions.
712 34. Failure to deliver a bounce message always caused it to be frozen, even if
713 there was an errors_to setting on the router. The errors_to setting is now
716 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
717 canonical form (fully expanded) before being placed in
718 $sender_host_address.
720 36. The table in the code that translates DNS record types into text (T_A to
721 "A" for instance) was missing entries for NS and CNAME. It is just possible
722 that this could have caused confusion if both these types were looked up
723 for the same domain, because the text type is used as part of Exim's
724 per-process caching. But the chance of anyone hitting this buglet seems
727 37. The dnsdb lookup has been extended in a number of ways.
729 (1) There is a new type, "zns", which walks up the domain tree until it
730 finds some nameserver records. It should be used with care.
732 (2) There is a new type, "mxh", which is like "mx" except that it returns
733 just the host names, not the priorities.
735 (3) It is now possible to give a list of domains (or IP addresses) to be
736 looked up. The behaviour when one of the lookups defers can be
737 controlled by a keyword.
739 (4) It is now possible to specify the separator character for use when
740 multiple records are returned.
742 38. The dnslists ACL condition has been extended: it is now possible to supply
743 a list of IP addresses and/or domains to be looked up in a particular DNS
746 39. Added log_selector=+queue_time_overall.
748 40. When running the queue in the test harness, wait just a tad after forking a
749 delivery process, to get repeatability of debugging output.
751 41. Include certificate and key file names in error message when GnuTLS fails
752 to set them up, because the GnuTLS error message doesn't include the name
753 of the failing file when there is a problem reading it.
755 42. Allow both -bf and -bF in the same test run.
757 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
759 44. The "Exiscan patch" is now merged into the mainline Exim source.
761 45. Sometimes the final signoff response after QUIT could fail to get
762 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
763 < 0 before doing a fflush(). This bug looks as though it goes back to the
764 introduction of TLS in release 3.20, but "sometimes" must have been rare
765 because the tests only now provoked it.
767 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
768 (this can affect the format of dates).
770 47. exim_tidydb, when checking for the continued existence of a message for
771 which it has found a message-specific retry record, was not finding
772 messages that were in split spool directories. Consequently, it was
773 deleting retry records that should have stayed in existence.
775 48. Steve fixed some bugs in eximstats.
777 49. The SPA authentication driver was not abandoning authentication and moving
778 on to the next authenticator when an expansion was forced to fail,
779 contradicting the general specification for all authenticators. Instead it
780 was generating a temporary error. It now behaves as specified.
782 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
783 (the order specifies the preference for clients). The order is now AES256,
784 AES128, 3DES, ARCFOUR128.
786 51. Small patch to Sieve code - explicitly set From: when generating an
789 52. Exim crashed if a remote delivery caused a very long error message to be
790 recorded - for instance if somebody sent an entire SpamAssassin report back
791 as a large number of 550 error lines. This bug was coincidentally fixed by
792 increasing the size of one of Exim's internal buffers (big_buffer) that
793 happened as part of the Exiscan merge. However, to be on the safe side, I
794 have made the code more robust (and fixed the comments that describe what
797 53. Now that there can be additional text after "Completed" in log lines (if
798 the queue_time_overall log selector is set), a one-byte patch to exigrep
799 was needed to allow it to recognize "Completed" as not the last thing in
802 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
803 patch that reportedly fixes this has been added. I am not expert enough to
804 create a test for it. This is what the patch creator wrote:
806 "I found a little strange behaviour of ldap code when working with
807 Windows 2003 AD Domain, where users was placed in more than one
808 Organization Units. When I tried to give exim partial DN, the exit code
809 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
810 But simultaneously result of request was absolutely normal ldap result,
811 so I produce this patch..."
813 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
814 REFERENCE, so I have modified the code to exclude the patch when that macro
817 55. Some experimental protocols are using DNS PTR records for new purposes. The
818 keys for these records are domain names, not reversed IP addresses. The
819 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
820 leaves it alone. Component reversal etc. now happens only for IP addresses.
823 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
825 57. Double the size of the debug message buffer (to 2048) so that more of very
826 long debug lines gets shown.
828 58. The exicyclog utility now does better if the number of log files to keep
829 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
831 59. Two changes related to the smtp_active_hostname option:
833 (1) $smtp_active_hostname is now available as a variable.
834 (2) The default for smtp_banner uses $smtp_active_hostname instead
835 of $primary_hostname.
837 60. The host_aton() function is supposed to be passed a string that is known
838 to be a valid IP address. However, in the case of IPv6 addresses, it was
839 not checking this. This is a hostage to fortune. Exim now panics and dies
840 if the condition is not met. A case was found where this could be provoked
841 from a dnsdb PTR lookup with an IPv6 address that had more than 8
842 components; fortuitously, this particular loophole had already been fixed
843 by change 4.50/55 above.
845 If there are any other similar loopholes, the new check in host_aton()
846 itself should stop them being exploited. The report I received stated that
847 data on the command line could provoke the exploit when Exim was running as
848 exim, but did not say which command line option was involved. All I could
849 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
853 61. There was a buffer overflow vulnerability in the SPA authentication code
854 (which came originally from the Samba project). I have added a test to the
855 spa_base64_to_bits() function which I hope fixes it.
858 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
859 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
861 63. The daemon start-up calls getloadavg() while still root for those OS that
862 need the first call to be done as root, but it missed one case: when
863 deliver_queue_load_max is set with deliver_drop_privilege. This is
864 necessary for the benefit of the queue runner, because there is no re-exec
865 when deliver_drop_privilege is set.
867 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
870 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
871 was in use, was not putting the data itself into the right store pool;
872 consequently, it could be overwritten for a subsequent message in the same
873 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
876 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
878 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
879 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
880 the function were treating the return as a boolean value, which happened to
881 work because 0=false and not-0=true, but is not correct code.
883 68. The host_aton() function was not handling scoped IPv6 addresses (those
884 with, for example, "%eth0" on the end) correctly.
886 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
887 negated items (that is, ~something) in unsigned ints. Some compilers
888 apparently mutter when there is no cast.
890 70. If an address verification called from an ACL failed, and did not produce a
891 user-specific message (i.e. there was only a "system" message), nothing was
892 put in $acl_verify_message. In this situation, it now puts the system
895 71. Change 4.23/11 added synchronization checking at the start of an SMTP
896 session; change 4.31/43 added the unwanted input to the log line - except
897 that it did not do this in the start of session case. It now does.
899 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
900 This is wrong and can cause the other end to generate a synchronization
901 error if it is another Exim or anything else that does the synchronization
902 check. A QUIT command is no longer sent after a timeout.
904 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
907 74. The defer_ok option of callout verification was not working if it was used
908 when verifying addresses in header lines, that is, for this case:
910 verify = header_sender/callout=defer_ok
912 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
913 those file descriptors could be used for SMTP connections. If anything
914 wrote to stderr (the example that came up was "warn" in embedded Perl), it
915 could be sent to the SMTP client, causing chaos. The daemon now opens
916 stdin, stdout, and stderr to /dev/null when it puts itself into the
919 76. Arrange for output from Perl's "warn" command to be written to Exim's main
920 log by default. The user can override this with suitable Perl magic.
922 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
923 the log message when discard triggers, was not working for the DATA ACL or
924 for the non-SMTP ACL.
926 78. Error message wording change in sieve.c.
928 79. If smtp_accept_max_per_host was set, the number of connections could be
929 restricted to fewer than expected, because the daemon was trying to set up
930 a new connection before checking whether the processes handling previous
931 connections had finished. The check for completed processes is now done
932 earlier. On busy systems, this bug wouldn't be noticed because something
933 else would have woken the daemon, and it would have reaped the completed
936 80. If a message was submitted locally by a user whose login name contained one
937 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
938 It caused a spool format error. I have fixed the spool reading code. A
939 related problem was that the "from" clause in the Received: line became
940 illegal because of the space(s). It is now covered by ${quote_local_part.
942 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
945 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
947 83. Patch from Sieve maintainer to fix unterminated string problem in
950 84. Some minor changes to the Linux configuration files to help with other
951 OS variants using glibc.
953 85. One more patch for Sieve to update vacation handling to latest spec.
956 ----------------------------------------------------
957 See the note above about the 4.44 and 4.50 releases.
958 ----------------------------------------------------
964 1. Change 4.43/35 introduced a bug that caused file counts to be
965 incorrectly computed when quota_filecount was set in an appendfile
968 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
969 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
972 3. Give more explanation in the error message when the command for a transport
973 filter fails to execute.
975 4. There are several places where Exim runs a non-Exim command in a
976 subprocess. The SIGUSR1 signal should be disabled for these processes. This
977 was being done only for the command run by the queryprogram router. It is
978 now done for all such subprocesses. The other cases are: ${run, transport
979 filters, and the commands run by the lmtp and pipe transports.
981 5. Some older OS have a limit of 256 on the maximum number of file
982 descriptors. Exim was using setrlimit() to set 1000 as a large value
983 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
984 systems. I've change it so that if it can't get 1000, it tries for 256.
986 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
987 was an oversight, and furthermore, ever since the addition of extra
988 controls (e.g. 4.43/32), the checks on when to allow different forms of
989 "control" were broken. There should now be diagnostics for all cases when a
990 control that does not make sense is encountered.
992 7. $recipients is now available in the predata ACL (oversight).
994 8. Tidy the search cache before the fork to do a delivery from a message
995 received from the command line. Otherwise the child will trigger a lookup
996 failure and thereby defer the delivery if it tries to use (for example) a
997 cached ldap connection that the parent has called unbind on.
999 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1000 of $address_data from the recipient verification was clobbered by the
1001 sender verification.
1003 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1004 was its contents. (It was OK if the option was not defined at all.)
1006 11. A "Completed" log line is now written for messages that are removed from
1007 the spool by the -Mrm option.
1009 12. $host_address is now set to the target address during the checking of
1010 ignore_target_hosts.
1012 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1013 being passed; this would have caused $sender_host_name to have been used if
1014 matching the list had actually called for a host name (not very likely,
1015 since this list is usually IP addresses). A host name is now passed as
1018 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1019 code that specifies a non-restarting handler (typically sigaction() in
1020 modern systems) in an attempt to fix a rare and obscure crash bug.
1022 15. Narrowed the window for a race in the daemon that could cause it to ignore
1023 SIGCHLD signals. This is not a major problem, because they are used only to
1024 wake it up if nothing else does.
1026 16. A malformed maildirsize file could cause Exim to calculate negative values
1027 for the mailbox size or file count. Odd effects could occur as a result.
1028 The maildirsize information is now recalculated if the size or filecount
1031 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1032 support for a long time. Removed HAVE_SYS_VFS_H.
1034 18. Updated exipick to current release from John Jetmore.
1036 19. Allow an empty sender to be matched against a lookup in an address list.
1037 Previously the only cases considered were a regular expression, or an
1040 20. Exim went into a mad DNS lookup loop when doing a callout where the
1041 host was specified on the transport, if the DNS lookup yielded more than
1044 21. The RFC2047 encoding function was originally intended for short strings
1045 such as real names; it was not keeping to the 75-character limit for
1046 encoded words that the RFC imposes. It now respects the limit, and
1047 generates multiple encoded words if necessary. To be on the safe side, I
1048 have increased the buffer size for the ${rfc2047: expansion operator from
1051 22. Failure to deliver a bounce message always caused it to be frozen, even if
1052 there was an errors_to setting on the router. The errors_to setting is now
1055 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1056 canonical form (fully expanded) before being placed in
1057 $sender_host_address.
1059 24. Updated eximstats to version 1.33
1061 25. Include certificate and key file names in error message when GnuTLS fails
1062 to set them up, because the GnuTLS error message doesn't include the name
1063 of the failing file when there is a problem reading it.
1065 26. Expand error message when OpenSSL has problems setting up cert/key files.
1068 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1069 (this can affect the format of dates).
1071 28. exim_tidydb, when checking for the continued existence of a message for
1072 which it has found a message-specific retry record, was not finding
1073 messages that were in split spool directories. Consequently, it was
1074 deleting retry records that should have stayed in existence.
1076 29. eximstats updated to version 1.35
1077 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1078 1.35 - bugfix such that pie charts by volume are generated correctly
1080 30. The SPA authentication driver was not abandoning authentication and moving
1081 on to the next authenticator when an expansion was forced to fail,
1082 contradicting the general specification for all authenticators. Instead it
1083 was generating a temporary error. It now behaves as specified.
1085 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1086 (the order specifies the preference for clients). The order is now AES256,
1087 AES128, 3DES, ARCFOUR128.
1089 31. Small patch to Sieve code - explicitly set From: when generating an
1092 32. Exim crashed if a remote delivery caused a very long error message to be
1093 recorded - for instance if somebody sent an entire SpamAssassin report back
1094 as a large number of 550 error lines. This bug was coincidentally fixed by
1095 increasing the size of one of Exim's internal buffers (big_buffer) that
1096 happened as part of the Exiscan merge. However, to be on the safe side, I
1097 have made the code more robust (and fixed the comments that describe what
1100 33. Some experimental protocols are using DNS PTR records for new purposes. The
1101 keys for these records are domain names, not reversed IP addresses. The
1102 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1103 leaves it alone. Component reversal etc. now happens only for IP addresses.
1106 34. The host_aton() function is supposed to be passed a string that is known
1107 to be a valid IP address. However, in the case of IPv6 addresses, it was
1108 not checking this. This is a hostage to fortune. Exim now panics and dies
1109 if the condition is not met. A case was found where this could be provoked
1110 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1111 components; fortuitously, this particular loophole had already been fixed
1112 by change 4.50/55 or 4.44/33 above.
1114 If there are any other similar loopholes, the new check in host_aton()
1115 itself should stop them being exploited. The report I received stated that
1116 data on the command line could provoke the exploit when Exim was running as
1117 exim, but did not say which command line option was involved. All I could
1118 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1119 running as the user.
1122 35. There was a buffer overflow vulnerability in the SPA authentication code
1123 (which came originally from the Samba project). I have added a test to the
1124 spa_base64_to_bits() function which I hope fixes it.
1127 36. The daemon start-up calls getloadavg() while still root for those OS that
1128 need the first call to be done as root, but it missed one case: when
1129 deliver_queue_load_max is set with deliver_drop_privilege. This is
1130 necessary for the benefit of the queue runner, because there is no re-exec
1131 when deliver_drop_privilege is set.
1133 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1134 was in use, was not putting the data itself into the right store pool;
1135 consequently, it could be overwritten for a subsequent message in the same
1136 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1139 38. Sometimes the final signoff response after QUIT could fail to get
1140 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1141 < 0 before doing a fflush(). This bug looks as though it goes back to the
1142 introduction of TLS in release 3.20, but "sometimes" must have been rare
1143 because the tests only now provoked it.
1149 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1150 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1151 Now it returns an integer. A number of calls were still expecting a T/F
1152 return. Fortuitously, in all cases, the tests worked in OK situations,
1153 which is the norm. However, things would have gone wrong on any write
1154 failures on the smtp file descriptor. This function is used when sending
1155 messages over SMTP and also when doing verify callouts.
1157 2. When Exim is called to do synchronous delivery of a locally submitted
1158 message (the -odf or -odi options), it no longer closes stderr before doing
1161 3. Implemented the mua_wrapper option.
1163 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1165 5. Implemented the functions header_remove(), header_testname(),
1166 header_add_at_position(), and receive_remove_recipient(), and exported them
1169 6. If an ACL "warn" statement specified the addition of headers, Exim already
1170 inserted X-ACL-Warn: at the start if there was no header name. However, it
1171 was not making this test for the second and subsequent header lines if
1172 there were newlines in the string. This meant that an invalid header could
1173 be inserted if Exim was badly configured.
1175 7. Allow an ACL "warn" statement to add header lines at the start or after all
1176 the Received: headers, as well as at the end.
1178 8. Added the rcpt_4xx retry error code.
1180 9. Added postmaster_mailfrom=xxx to callout verification option.
1182 10. Added mailfrom=xxxx to the callout verification option, for verify=
1185 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1186 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1188 12. Inserted some casts to stop certain compilers warning when using pointer
1189 differences as field lengths or precisions in printf-type calls (mostly
1190 affecting debugging statements).
1192 13. Added optional readline() support for -be (dynamically loaded).
1194 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1195 same clock tick as a message's arrival, so that its received time was the
1196 same as the "first fail" time on the retry record, and that message
1197 remained on the queue past the ultimate address timeout, every queue runner
1198 would try a delivery (because it was past the ultimate address timeout) but
1199 after another failure, the ultimate address timeout, which should have then
1200 bounced the address, did not kick in. This was a "< instead of <=" error;
1201 in most cases the first failure would have been in the next clock tick
1202 after the received time, and all would be well.
1204 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1205 being recognized when the domain list was tested by the match_domain
1206 condition in an expansion string.
1208 16. Added the ${str2b64: operator.
1210 17. Exim was always calling setrlimit() to set a large limit for the number of
1211 processes, without checking whether the existing limit was already
1212 adequate. (It did check for the limit on file descriptors.) Furthermore,
1213 errors from getrlimit() and setrlimit() were being ignored. Now they are
1214 logged to the main and panic logs, but Exim does carry on, to try to do its
1215 job under whatever limits there are.
1217 18. Imported PCRE 5.0.
1219 19. Trivial typo in log message " temporarily refused connection" (the leading
1222 20. If the log selector return_path_on_delivery was set and an address was
1223 redirected to /dev/null, the delivery process crashed because it assumed
1224 that a return path would always be set for a "successful" delivery. In this
1225 case, the whole delivery is bypassed as an optimization, and therefore no
1228 21. Internal re-arrangement: the function for sending a challenge and reading
1229 a response while authentication was assuming a zero-terminated challenge
1230 string. It's now changed to take a pointer and a length, to allow for
1231 binary data in such strings.
1233 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1235 23. Exim was not respecting finduser_retries when seeking the login of the
1236 uid under which it was called; it was always trying 10 times. (The default
1237 setting of finduser_retries is zero.) Also, it was sleeping after the final
1238 failure, which is pointless.
1240 24. Implemented tls_on_connect_ports.
1242 25. Implemented acl_smtp_predata.
1244 26. If the domain in control=submission is set empty, Exim assumes that the
1245 authenticated id is a complete email address when it generates From: or
1246 Sender: header lines.
1248 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1249 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1250 chown and chgrp in /bin and hostname in /usr/bin.
1252 28. Exim was keeping the "process log" file open after each use, just as it
1253 does for the main log. This opens the possibility of it remaining open for
1254 long periods when the USR1 signal hits a daemon. Occasional processlog
1255 errors were reported, that could have been caused by this. Anyway, it seems
1256 much more sensible not to leave this file open at all, so that is what now
1259 29. The long-running daemon process does not normally write to the log once it
1260 has entered its main loop, and it closes the log before doing so. This is
1261 so that log files can straightforwardly be renamed and moved. However,
1262 there are a couple of unusual error situations where the daemon does write
1263 log entries, and I had neglected to close the log afterwards.
1265 30. The text of an SMTP error response that was received during a remote
1266 delivery was being truncated at 512 bytes. This is too short for some of
1267 the long messages that one sometimes sees. I've increased the limit to
1270 31. It is now possible to make retry rules that apply only when a message has a
1271 specific sender, in particular, an empty sender.
1273 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1274 it possible to be selective about when SMTP synchronization is enforced.
1276 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1278 32. Implemented hosts_connection_nolog.
1280 33. Added an ACL for QUIT.
1282 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1285 35. Added mailbox_size and mailbox_filecount to appendfile.
1287 36. Added control = no_multiline_responses to ACLs.
1289 37. There was a bug in the logic of the code that waits for the clock to tick
1290 in the case where the clock went backwards by a substantial amount such
1291 that the microsecond fraction of "now" was more than the microsecond
1292 fraction of "then" (but the whole seconds number was less).
1294 38. Added support for the libradius Radius client library this is found on
1295 FreeBSD (previously only the radiusclient library was supported).
1301 1. When certain lookups returned multiple values in the form name=value, the
1302 quoting of the values was not always being done properly. Specifically:
1303 (a) If the value started with a double quote, but contained no whitespace,
1305 (b) If the value contained whitespace other than a space character (i.e.
1306 tabs or newlines or carriage returns) it was not quoted.
1307 This fix has been applied to the mysql and pgsql lookups by writing a
1308 separate quoting function and calling it from the lookup code. The fix
1309 should probably also be applied to nisplus, ibase and oracle lookups, but
1310 since I cannot test any of those, I have not disturbed their existing code.
1312 2. A hit in the callout cache for a specific address caused a log line with no
1313 reason for rejecting RCPT. Now it says "Previous (cached) callout
1314 verification failure".
1316 3. There was an off-by-one bug in the queryprogram router. An over-long
1317 return line was truncated at 256 instead of 255 characters, thereby
1318 overflowing its buffer with the terminating zero. As well as fixing this, I
1319 have increased the buffer size to 1024 (and made a note to document this).
1321 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1322 when Exim is waiting for an SMTP response from a remote server, Exim
1323 restarts its select() call on the socket, thereby resetting its timeout.
1324 This is not a problem when such interrupts are rare. Somebody set up a cron
1325 job to run exiwhat every 2 minutes, which is less than the normal select()
1326 timeout (5 or 10 minutes). This meant that the select() timeout never
1327 kicked in because it was always reset. I have fixed this by comparing the
1328 time when an interrupt arrives with the time at the start of the first call
1329 to select(). If more time than the timeout has elapsed, the interrupt is
1330 treated as a timeout.
1332 5. Some internal re-factoring in preparation for the addition of Sieve
1333 extensions (by MH). In particular, the "personal" test is moved to a
1334 separate function, and given an option for scanning Cc: and Bcc: (which is
1335 not set for Exim filters).
1337 6. When Exim created an email address using the login of the caller as the
1338 local part (e.g. when creating a From: or Sender: header line), it was not
1339 quoting the local part when it contained special characters such as @.
1341 7. Installed new OpenBSD configuration files.
1343 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1344 try to make them clearer.
1346 9. Callout options, other than the timeout value, were being ignored when
1347 verifying sender addresses in header lines. For example, when using
1349 verify = header_sender/callout=no_cache
1351 the cache was (incorrectly) being used.
1353 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1354 only the Cygwin environment.
1356 11. When return_path_on_delivery was set as a log selector, if different remote
1357 addresses in the same message used different return paths and parallel
1358 remote delivery occurred, the wrong values would sometimes be logged.
1359 (Whenever a remote delivery process finished, the return path value from
1360 the most recently started remote delivery process was logged.)
1362 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1363 lines when AUTH and/or TLS are in use. This is the "received protocol"
1364 field. Exim used to use "asmtp" for authenticated SMTP, without any
1365 indication (in the protocol name) for TLS use. Now it follows the RFC and
1366 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1367 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1368 names appear in log lines as well as in Received: header lines.
1370 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1371 extensions, and comparison tests, and to fix some bugs.
1373 14. Changes to the "personal" filter test:
1375 (1) The test was buggy in that it was just doing the equivalent of
1376 "contains" tests on header lines. For example, if a user's address was
1377 anne@some.where, the "personal" test would incorrectly be true for
1379 To: susanne@some.where
1381 This test is now done by extracting each address from the header in turn,
1382 and checking the entire address. Other tests that are part of "personal"
1383 are now done using regular expressions (for example, to check local parts
1384 of addresses in From: header lines).
1386 (2) The list of non-personal local parts in From: addresses has been
1387 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1388 taken from the Sieve specification recommendations.
1390 (3) If the message contains any header line starting with "List-" it is
1391 treated as non-personal.
1393 (4) The test for "circular" in the Subject: header line has been removed
1394 because it now seems ill-conceived.
1396 15. Minor typos in src/EDITME comments corrected.
1398 16. Installed latest exipick from John Jetmore.
1400 17. If headers_add on a router specified a text string that was too long for
1401 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1402 of string_sprintf() is now avoided.
1404 18. $message_body_size was not set (it was always zero) when running the DATA
1405 ACL and the local_scan() function.
1407 19. For the "mail" command in an Exim filter, no default was being set for
1408 the once_repeat time, causing a random time value to be used if "once" was
1409 specified. (If the value happened to be <= 0, no repeat happened.) The
1410 default is now 0s, meaning "never repeat". The "vacation" command was OK
1411 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1412 (I found it when inspecting the code).
1414 20. There is now an overall timeout for performing a callout verification. It
1415 defaults to 4 times the callout timeout, which applies to individual SMTP
1416 commands during the callout. The overall timeout applies when there is more
1417 than one host that can be tried. The timeout is checked before trying the
1418 next host. This prevents very long delays if there are a large number of
1419 hosts and all are timing out (e.g. when the network connections are timing
1420 out). The value of the overall timeout can be changed by specifying an
1421 additional sub-option for "callout", called "maxwait". For example:
1423 verify = sender/callout=5s,maxwait=20s
1425 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1426 to the end before writing, but this should make it even safer).
1428 22. Exim was forgetting that it had advertised PIPELINING for the second and
1429 subsequent messages on an SMTP connection. It was also not resetting its
1430 memory on STARTTLS and an internal HELO.
1432 23. When Exim logs an SMTP synchronization error within a session, it now
1433 records whether PIPELINING has been advertised or not.
1435 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1436 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1437 rather than long int.
1439 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1441 26. Added the never_mail option to autoreply.
1447 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1448 crash if the getsockname() call failed; this can happen if a connection is
1449 closed very soon after it is established. The problem was simply in the
1450 order in which certain operations were done, causing Exim to try to write
1451 to the SMTP stream before it had set up the file descriptor. The bug has
1452 been fixed by making things happen in the correct order.
1458 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1459 before the connection was closed, thus losing the rejection response.
1461 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1462 some early Solaris releases, but causes trouble in current releases where
1463 socklen_t is defined.
1465 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1468 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1471 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1472 that releasing the top of it at the end releases what was used for sub-
1473 expansions (unless the block got too big). However, discard this block if
1474 the first thing is a variable or header, so that we can use its block when
1475 it is dynamic (useful for very large $message_headers, for example).
1477 6. Lookups now cache *every* query, not just the most recent. A new, separate
1478 store pool is used for this. It can be recovered when all lookup caches are
1479 flushed. Lookups now release memory at the end of their result strings.
1480 This has involved some general refactoring of the lookup sources.
1482 7. Some code has been added to the store_xxx() functions to reduce the amount
1483 of flapping under certain conditions.
1485 8. log_incoming_interface used to affect only the <= reception log lines. Now
1486 it causes the local interface and port to be added to several more SMTP log
1487 lines, for example "SMTP connection from", and rejection lines.
1489 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1491 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1493 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1494 could be overwritten at the end of the current message (or the start of a
1495 new message if it was set in a HELO ACL). The value is now preserved for
1496 the duration of the SMTP connection.
1498 12. If a transport had a headers_rewrite setting, and a matching header line
1499 contained an unqualified address, that address was qualified, even if it
1500 did not match any rewriting rules. The underlying bug was that the values
1501 of the flags that permit the existence of unqualified sender and recipient
1502 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1503 non-local messages, and by -bnq for local messages) were not being
1504 preserved with the message after it was received.
1506 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1507 "next input=" as part of the text comprising the host identity instead of
1508 the correct text. The code was using the same buffer for two different
1509 strings. However, depending on which order the printing function evaluated
1510 its arguments, the bug did not always show up. Under Linux, for example, my
1511 test suite worked just fine.
1513 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1514 doesn't work with some older versions of Perl. It has been changed to "my",
1515 which in any case is probably the better facility to use.
1517 15. A really picky compiler found some instances of statements for creating
1518 error messages that either had too many or two few arguments for the format
1521 16. The size of the buffer for calls to the DNS resolver has been increased
1522 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1523 for addresses that have a lot of PTR records. This alleviates a problem; it
1524 does not fully solve it.
1526 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1527 buffer now truncates the list and logs the incident, which is the same
1528 action as happens when Exim is looking up a host name and its aliases.
1529 Previously in this situation something unpredictable would happen;
1530 sometimes it was "internal error: store_reset failed".
1532 18. If a server dropped the connection unexpectedly when an Exim client was
1533 using GnuTLS and trying to read a response, the client delivery process
1534 crashed while trying to generate an error log message.
1536 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1537 string, for example:
1539 warn message = H1: something\nH2: something
1541 the text was added as a single header line from Exim's point of view
1542 though it ended up OK in the delivered message. However, searching for the
1543 second and subsequent header lines using $h_h2: did not work. This has been
1544 fixed. Similarly, if a system filter added multiple headers in this way,
1545 the routers could not see them.
1547 20. Expanded the error message when iplsearch is called with an invalid key to
1548 suggest using net-iplsearch in a host list.
1550 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1551 ACLs are no longer actually imposed (and a message to that effect is
1554 22. If a "gecos" field in a passwd entry contained escaped characters, in
1555 particular, if it contained a \" sequence, Exim got it wrong when building
1556 a From: or a Sender: header from that name. A second bug also caused
1557 incorrect handling when an unquoted " was present following a character
1558 that needed quoting.
1560 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1561 was not being matched caselessly.
1563 24. Arranged for all hyphens in the exim.8 source to be escaped with
1566 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1567 properly. Recipient callout cache records were still being keyed to include
1568 the sender, even when use_sender was set false. This led to far more
1569 callouts that were necessary. The sender is no longer included in the key
1570 when use_sender is false.
1572 26. Added "control = submission" modifier to ACLs.
1574 27. Added the ${base62d: operator to decode base 62 numbers.
1576 28. dnsdb lookups can now access SRV records.
1578 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1579 the configuration file.
1581 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1582 (-v) mode. This makes the output for a verbose queue run more intelligible.
1584 31. Added a use_postmaster feature to recipient callouts.
1586 32. Added the $body_zerocount variable, containing the number of binary zero
1587 bytes in the message body.
1589 33. The time of last modification of the "new" subdirectory is now used as the
1590 "mailbox time last read" when there is a quota error for a maildir
1593 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1595 35. Added +ignore_unknown as a special item in host lists.
1597 36. Code for decoding IPv6 addresses in host lists is now included, even if
1598 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1599 address was recognized as an IP address, but was then not correctly decoded
1600 into binary, causing unexpected and incorrect effects when compared with
1607 1. Very minor rewording of debugging text in manualroute to say "list of
1608 hosts" instead of "hostlist".
1610 2. If verify=header_syntax was set, and a header line with an unqualified
1611 address (no domain) and a large number of spaces between the end of the
1612 name and the colon was received, the reception process suffered a buffer
1613 overflow, and (when I tested it) crashed. This was caused by some obsolete
1614 code that should have been removed. The fix is to remove it!
1616 3. When running in the test harness, delay a bit after writing a bounce
1617 message to get a bit more predictability in the log output.
1619 4. Added a call to search_tidyup() just before forking a reception process. In
1620 theory, someone could use a lookup in the expansion of smtp_accept_max_
1621 per_host which, without the tidyup, could leave open a database connection.
1623 5. Added the variables $recipient_data and $sender_data which get set from a
1624 lookup success in an ACL "recipients" or "senders" condition, or a router
1625 "senders" option, similar to $domain_data and $local_part_data.
1627 6. Moved the writing of debug_print from before to after the "senders" test
1630 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1631 problems for message scanning, either using a data ACL, or using
1632 local_scan() because the Received: header was not generated till after they
1633 were called (in order to set the time as the time of reception completion).
1634 I have revised the way this works. The header is now generated after the
1635 body is received, but before the ACL or local_scan() are called. After they
1636 are run, the timestamp in the header is updated.
1642 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1643 before starting a queue runner without re-exec. This happened only when
1644 deliver_drop_privilege was set or when the Exim user was set to root. The
1645 effect of the bug was that timeouts during subsequent deliveries caused
1646 crashes instead of being properly handled. The handler is now left at its
1647 default (and expected) setting.
1649 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1650 message, again when deliver_drop_privilege is set or Exim is run as root.
1651 The bug described in (1) was not present in this case, but the tidying up
1652 of the other signals was missing. I have made the two cases consistent.
1654 3. The ignore_target_hosts setting on a manualroute router was being ignored
1655 for hosts that were looked up using the /MX notation.
1657 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1660 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1661 operated on the sender address. After changing the $sender_address to <>
1662 for the sender address verify, Exim was re-instated it as the original
1663 (before rewriting) address, but remembering that it had rewritten it, so it
1664 wasn't rewriting it again. This bug also had the effect of breaking the
1665 sender address verification caching when the sender address was rewritten.
1667 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1668 This has been changed so that if the ip literal address matches
1669 ignore_target_hosts, the router declines.
1671 7. Added expansion conditions match_domain, match_address, and match_local_
1672 part (NOT match_host).
1674 8. The placeholder for the Received: header didn't have a length field set.
1676 9. Added code to Exim itself and to exim_lock to test for a specific race
1677 condition that could lead to file corruption when using MBX delivery. The
1678 issue is with the lockfile that is created in /tmp. If this file is removed
1679 after a process has opened it but before that process has acquired a lock,
1680 there is the potential for a second process to recreate the file and also
1681 acquire a lock. This could lead to two Exim processes writing to the file
1682 at the same time. The added code performs the same test as UW imapd; it
1683 checks after acquiring the lock that its file descriptor still refers to
1684 the same named file.
1686 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1687 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1690 11. Added the smtp_active_hostname option. If used, this will typically be made
1691 to depend on the incoming interface address. Because $interface_address is
1692 not set up until the daemon has forked a reception process, error responses
1693 that can happen earlier (such as "too many connections") no longer contain
1696 12. If an expansion in a condition on a "warn" statement fails because a lookup
1697 defers, the "warn" statement is abandoned, and the next ACL statement is
1698 processed. Previously this caused the whole ACL to be aborted.
1700 13. Added the iplsearch lookup type.
1702 14. Added ident_timeout as a log selector.
1704 15. Added tls_certificate_verified as a log selector.
1706 16. Added a global option tls_require_ciphers (compare the smtp transport
1707 option of the same name). This controls incoming TLS connections.
1709 17. I finally figured out how to make tls_require_ciphers do a similar thing
1710 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1711 before starting the TLS session.
1713 18. Tabs are now shown as \t in -bP output.
1715 19. If the log selector return_path_on_delivery was set, Exim crashed when
1716 bouncing a message because it had too many Received: header lines.
1718 20. If two routers both had headers_remove settings, and the first one included
1719 a superfluous trailing colon, the final name in the first list and the
1720 first name in the second list were incorrectly joined into one item (with a
1721 colon in the middle).
1727 1. Added -C and -D options to the exinext utility, mainly to make it easier
1728 to include in the automated testing, but these could be helpful when
1729 multiple configurations are in use.
1731 2. The exinext utility was not formatting the output nicely when there was
1732 an alternate port involved in the retry record key, nor when there was a
1733 message id as well (for retries that were specific to a specific message
1734 and a specific host). It was also confused by IPv6 addresses, because of
1735 the additional colons they contain. I have fixed the IPv4 problem, and
1736 patched it up to do a reasonable job for IPv6.
1738 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1739 delivery, the log line now contains "pipelined" if PIPELINING was used.
1741 4. An SMTP transport process used to panic and die if the bind() call to set
1742 an explicit outgoing interface failed. This has been changed; it is now
1743 treated in the same way as a connect() failure.
1745 5. A reference to $sender_host_name in the part of a conditional expansion
1746 that was being skipped was still causing a DNS lookup. This no longer
1749 6. The def: expansion condition was not recognizing references to header lines
1750 that used bh_ and bheader_.
1752 7. Added the _cache feature to named lists.
1754 8. The code for checking quota_filecount in the appendfile transport was
1755 allowing one more file than it should have been.
1757 9. For compatibility with Sendmail, the command line option
1765 and sets the incoming protocol and host name (for trusted callers). The
1766 host name and its colon can be omitted when only the protocol is to be set.
1767 Note the Exim already has two private options, -pd and -ps, that refer to
1768 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1769 "s", but I don't think that's a major issue.
1771 10. A number of refactoring changes to the code, none of which should affect
1774 (a) The number of logging options was getting close to filling up the
1775 32-bit word that was used as a bit map. I have split them into two classes:
1776 those that are passed in the argument to log_write(), and those that are
1777 only ever tested independently outside of that function. These are now in
1778 separate 32-bit words, so there is plenty of room for expansion again.
1779 There is no change in the user interface or the logging behaviour.
1781 (b) When building, for example, log lines, the code previously used a
1782 macro that called string_cat() twice, in order to add two strings. This is
1783 not really sufficiently general. Furthermore, there was one instance where
1784 it was actually wrong because one of the argument was used twice, and in
1785 one call a function was used. (As it happened, calling the function twice
1786 did not affect the overall behaviour.) The macro has been replaced by a
1787 function that can join an arbitrary number of extra strings onto a growing
1790 (c) The code for expansion conditions now uses a table and a binary chop
1791 instead of a serial search (which was left over from when there were very
1792 few conditions). Also, it now recognizes conditions like "pam" even when
1793 the relevant support is not compiled in: a suitably worded error message is
1794 given if an attempt is made to use such a condition.
1796 11. Added ${time_interval:xxxxx}.
1798 12. A bug was causing one of the ddress fields not to be passed back correctly
1799 from remote delivery subprocesses. The field in question was not being
1800 subsequently used, so this caused to problems in practice.
1802 13. Added new log selectors queue_time and deliver_time.
1804 14. Might have fixed a bug in maildirsizefile handling that threw up
1805 "unexpected character" debug warnings, and recalculated the data
1806 unnecessarily. In any case, I expanded the warning message to give more
1809 15. Added the message "Restricted characters in address" to the statements in
1810 the default ACL that block characters like @ and % in local parts.
1812 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
1813 Three changes have been made:
1815 (a) There was a serious bug; a negative response to MAIL caused the whole
1816 recipient domain to be cached as invalid, thereby blocking all messages
1817 to all local parts at the same domain, from all senders. This bug has
1818 been fixed. The domain is no longer cached after a negative response to
1819 MAIL if the sender used is not empty.
1821 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1824 (c) A new callout option, "use_sender" has been added for people who want
1825 the modified behaviour.
1831 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1834 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1835 indeed breaks things for older releases.
1837 3. Added additional logging to the case where there is a problem reading data
1838 from a filter that is running in a subprocess using a pipe, in order to
1839 try to track down a specific problem.
1841 4. Testing facility fudge: when running in the test harness and attempting
1842 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1843 getting "No route to host". Convert this to a timeout.
1845 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1848 6. Some OS don't have socklen_t but use size_t instead. This affects the
1849 fifth argument of getsockopt() amongst other things. This is now
1850 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1851 can be set for individual OS. I have set it for SunOS5, OSF1, and
1852 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1853 some earlier ones do not.
1855 7. Change 4.30/15 was not doing the test caselessly.
1857 8. The standard form for an IPv6 address literal was being rejected by address
1858 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1859 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1860 this, as well as the form without the "IPv6" on the front (but only when
1861 address literals are enabled, of course).
1863 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
1865 10. Exim crashed if a message with an empty sender address specified by -f
1866 encountered a router with an errors_to setting. This could be provoked only
1867 by a command such as
1871 where an empty string was supplied; "<>" did not hit this bug.
1873 11. Installed PCRE release 4.5.
1875 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1876 remained set. It is now erased.
1878 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1879 times from message ids (which are base 36 rather than the normal 62).
1881 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1882 were being counted as actual protocol errors, and logged if the log
1883 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1884 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1885 and DATA following a set of rejected RCPTs do not count as protocol errors.
1886 In other words, Exim assumes they were pipelined, though this may not
1887 actually be the case. Of course, in all cases the client gets an
1888 appropriate error code.
1890 15. If a lookup fails in an ACL condition, a message about the failure may
1891 be available; it is used if testing the ACL cannot continue, because most
1892 such messages specify what the cause of the deferral is. However, some
1893 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1894 that caused an old message to be retained and used if a later statement
1895 caused a defer, replacing the real cause of the deferral.
1897 16. If an IP address had so many PTR records that the DNS lookup buffer
1898 was not large enough to hold them, Exim could crash while trying to process
1899 the truncated data. It now detects and logs this case.
1901 17. Further to 4.21/58, another change has been made: if (and only if) the
1902 first line of a message (the first header line) ends with CRLF, a bare LF
1903 in a subsequent header line has a space inserted after it, so as not to
1904 terminate the header.
1906 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
1907 unnecessarily, used atoi() instead of strtol(), and didn't check the
1908 termination when getting file sizes from file names by regex.
1910 19. Completely re-implemented the support for maildirsize files, in the light
1911 of a number of problems with the previous contributed implementation
1912 (4.30/29). In particular:
1914 . If the quota is zero, the maildirsize file is maintained, but no quota is
1917 . If the maildir directory does not exist, it is created before any attempt
1918 to write a maildirsize file.
1920 . The quota value in the file is just a cache; if the quota is changed in
1921 the transport, the new value overrides.
1923 . A regular expression is available for excluding directories from the
1926 20. The autoreply transport checks the characters in options that define the
1927 message's headers; it allows continued headers, but it was checking with
1928 isspace() after an embedded newline instead of explicitly looking for a
1931 21. If all the "regular" hosts to which an address was routed had passed their
1932 expiry times, and had not reached their retry times, the address was
1933 bounced, even if fallback hosts were defined. Now Exim should go on to try
1936 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1937 equivalent code in the SMTP transport. Some hosts send humungous responses
1938 to HELO/EHLO, more than 1024 it seems.
1940 23. Refactoring: code in filter.c used (void *) for "any old type" but this
1941 gives compiler warnings in some environments. I've now done it "properly",
1944 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1945 (because of problems with the built-in one) was declared to return uschar *
1946 instead of char *, causing compiler failure.
1948 25. Fixed a file descriptor leak when processing alias/forward files.
1950 26. Fixed a minor format string issue in dbfn.c.
1952 27. Typo in exim.c: ("dmbnz" for "dbmnz").
1954 28. If a filter file refered to $h_xxx or $message_headers, and the headers
1955 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1958 29. When a sender address is verified, it is cached, to save repeating the test
1959 when there is more than one recipient in a message. However, when the
1960 verification involves a callout, it is possible for different callout
1961 options to be set for different recipients. It is too complicated to keep
1962 track of this in the cache, so now Exim always runs a verification when a
1963 callout is required, relying on the callout cache for the optimization.
1964 The overhead is duplication of the address routing, but this should not be
1967 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
1968 to be verified with callout=postmaster, and the main callout worked but the
1969 postmaster check failed, the verification correctly failed. However, if a
1970 subsequent RCPT command asked for sender verification *without* the
1971 postmaster check, incorrect caching caused this verification also to fail,
1974 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
1975 it was not caching the DNS options (qualify_single, search_parents) that
1976 were used when the lookup failed. A subsequent lookup with different
1977 options therefore always gave the same answer, though there were cases
1978 where it should not have. (Example: a "domains = !$mx_any" option on a
1979 dnslookup router: the "domains" option is always processed without any
1980 widening, but the router might have qualify_single set.) Now Exim uses the
1981 cached value only when the same options are set.
1983 32. Added John Jetmore's "exipick" utility to the distribution.
1985 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
1986 than a timeout (e.g. a certificate is required, and is not provided), an
1987 Exim server now closes the connection immediately. Previously it waited for
1988 the client to close - but if the client is SSL, it seems that they each
1989 wait for each other, leading to a delay before one of them times out.
1991 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
1992 maintained 0.8.x compatibility because I don't think many are using it, and
1993 it is clearly obsolete.
1995 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
1998 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
1999 client certificate was expired. A simple patch fixes this, though I don't
2000 understand the full logic of why the verify callback is called multiple
2003 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2004 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2005 which causes problems with some clients (such as the Certicom SSL Plus
2006 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2007 disables the coutermeasure allowing Eudora to connect."
2009 38. Exim was not checking that a write() to a log file succeeded. This could
2010 lead to Bad Things if a log got too big, in particular if it hit a file
2011 size limit. Exim now panics and dies if it cannot write to a log file, just
2012 as it does if it cannot open a log file.
2014 39. Modified OS/Makefile-Linux so that it now contains
2016 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2018 The two -D definitions ensure that Exim is compiled with large file
2019 support, which makes it possible to handle log files that are bigger than
2022 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2023 instance) a domain was checked against a named list that involved a lookup,
2024 causing $domain_data to be set, then another domain was checked against the
2025 same list, then the first domain was re-checked, the value of $domain_data
2026 after the final check could be wrong. In particular, if the second check
2027 failed, it could be set empty. This bug probably also applied to
2030 41. The strip_trailing_dot option was not being applied to the address given
2031 with the -f command-line option.
2033 42. The code for reading a message's header from the spool was incrementing
2034 $received_count, but never initializing it. This meant that the value was
2035 incorrect (doubled) while delivering a message in the same process in which
2036 it was received. In the most common configuration of Exim, this never
2037 happens - a fresh exec is done - but it can happen when
2038 deliver_drop_privilege is set.
2040 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2041 it now includes up to 150 characters of the unexpected data in the log
2044 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2045 and building data strings. The size of both of these buffers was 10 000
2046 bytes - far larger than anybody would *ever* want, thought I. Needless to
2047 say, somebody hit the limit. I have increased the maximum line length to
2048 20 000 and the maximum data length of concatenated lines to 100 000. I have
2049 also fixed two bugs, because there was no checking on these buffers. Tsk,
2050 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2051 buffer is too small.
2053 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2054 lsearch lookups. Now it does.
2056 46. When parsing a route_list item in a manualroute router, a fixed-length
2057 buffer was used for the list of hosts. I made this 1024 bytes long,
2058 thinking that nobody would ever have a list of hosts that long. Wrong.
2059 Somebody had a whole pile of complicated expansion conditions, and the
2060 string was silently truncated, leading to an expansion error. It turns out
2061 that it is easier to change to an unlimited length (owing to other changes
2062 that have happened since this code was originally written) than to build
2063 structure for giving a limitation error. The length of the item that
2064 expands into the list of hosts is now unlimited.
2066 47. The lsearch lookup could not handle data where the length of text line was
2067 more than 4095 characters. Such lines were truncated, leading to shortened
2068 data being returned. It should now handle lines of any length.
2070 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2071 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2074 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2075 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2076 no longer happens in comment lines. A list of replacements is now placed
2077 at the head of all of the source files, except those whose only change is
2078 to replace PERL_COMMAND in the very first #! line.
2080 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2081 messages on the queue, with a bottom-up merge sort, using code contributed
2082 by Michael Haardt. This should make operations like -bp somewhat faster on
2083 large queues. It won't affect queue runners, except when queue_run_in_order
2086 51. Installed eximstats 1.31 in the distribution.
2088 52. Added support for SRV lookups to the dnslookup router.
2090 53. If an ACL referred to $message_body or $message_body_end, the value was not
2091 reset for any messages that followed in the same SMTP session.
2093 54. The store-handling optimization for building very long strings was not
2094 differentiating between the different store pools. I don't think this
2095 actually made any difference in practice, but I've tidied it.
2097 55. While running the routers to verify a sender address, $sender_address
2098 was still set to the sender address. This is wrong, because when routing to
2099 send a bounce to the sender, it would be empty. Therefore, I have changed
2100 it so that, while verifying a sender address, $sender_address is set to <>.
2101 (There is no change to what happens when verifying a recipient address.)
2103 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2104 target A or AAAA records (if not already returned) without resetting the
2105 qualify_single or search_parents options of the DNS resolver. These are
2106 inappropriate in this case because the targets of MX and SRV records must
2107 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2108 target that, when qualified, matched something in the local domain. These
2109 two options are now turned off when doing these lookups.
2111 57. It seems that at least some releases of Reiserfs (which does not have the
2112 concept of a fixed number of inodes) returns zero and not -1 for the
2113 number of available inodes. This interacted badly with check_spool_inodes,
2114 which assumed that -1 was the "no such thing" setting. What I have done is
2115 to check that the total number of inodes is greater than zero before doing
2116 the test of how many are available.
2118 58. When a "warn" ACL statement has a log_message modifier, the message is
2119 remembered, and not repeated. This is to avoid a lot of repetition when a
2120 message has many recipients that cause the same warning to be written.
2121 Howewer, Exim was preserving the list of already written lines for an
2122 entire SMTP session, which doesn't seem right. The memory is now reset if a
2123 new message is started.
2125 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2126 debugging output unless log_rewrite was also set.
2128 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2129 of (int)(handle) when we know that handle contains (void *)(-1).
2131 61. The Exim daemon panic-logs an error return when it closes the incoming
2132 connection. However "connection reset by peer" seems to be common, and
2133 isn't really an error worthy of noting specially, so that particular error
2136 62. When Exim is trying to find all the local interfaces, it used to panic and
2137 die if the ioctl to get the interface flags failed. However, it seems that
2138 on at least one OS (Solaris 9) it is possible to have an interface that is
2139 included in the list of interfaces, but for which you get a failure error
2140 for this call. This happens when the interface is not "plumbed" into a
2141 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2142 failure of the "get flags" call assumes that the interface is down.
2144 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2145 makes life easier for people who are doing arithmetic on fields extracted
2146 from dates, where you often get leading zeros that should not be
2147 interpreted as octal.
2149 64. Added qualify_domain to the redirect router, to override the global
2152 65. If a pathologically long header line contained very many addresses (the
2153 report of this problem mentioned 10 000) and each of them was rewritten,
2154 Exim could use up a very large amount of memory. (It kept on making new
2155 copies of the header line as it rewrote, and never released the old ones.)
2156 At the expense of a bit more processing, the header rewriting function has
2157 been changed so that it no longer eats memory in this way.
2159 66. The generation of the Received: header has been moved from the time that a
2160 message starts to be received, to the time that it finishes. The timestamp
2161 in the Received: header should now be very close to that of the <= log
2162 line. There are two side-effects of this change:
2164 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2165 logged header lines no longer include the local Received: line, because
2166 it has not yet been created. The same applies to a copy of the message
2167 that is returned to a non-SMTP sender when a message is rejected.
2169 (b) When a filter file is tested using -bf, no additional Received: header
2170 is added to the test message. After some thought, I decided that this
2173 This change does not affect the value of $received_for. It is still set
2174 after address rewriting, but before local_scan() is called.
2176 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2178 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2179 gave an unhelpful panic error message, and a defer error. I have managed to
2180 change this behaviour so that it now rejects any supplied certificate,
2181 which seems right, as the list of acceptable certificates is empty.
2183 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2184 gave an unhelpful defer error. I have not managed to make this reject any
2185 supplied certificates, but the error message it gives is "no certificate
2186 supplied", which is not helpful.
2188 70. exigrep's output now also includes lines that are not associated with any
2189 message, but which match the given pattern. Implemented by a patch from
2190 Martin Sluka, which also tidied up the Perl a bit.
2192 71. Recipient callout verification, like sender verification, was using <> in
2193 the MAIL FROM command. This isn't really the right thing, since the actual
2194 sender may affect whether the remote host accepts the recipient or not. I
2195 have changed it to use the actual sender in the callout; this means that
2196 the cache record is now keyed on a recipient/sender pair, not just the
2197 recipient address. There doesn't seem to be a real danger of callout loops,
2198 since a callout by the remote host to check the sender would use <>.
2199 [SEE ABOVE: changed after hitting problems.]
2201 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2202 temporary errors. However, in the case of such a code being given after
2203 the end of a data transmission (i.e. after ".") Exim was failing to write
2204 a retry record for the message. (Yes, there was some broken host that was
2205 actually sending 8xx at this point.)
2207 73. An unknown lookup type in a host list could cause Exim to panic-die when
2208 the list was checked. (An example that provoked this was putting <; in the
2209 middle of a list instead of at the start.) If this happened during a DATA
2210 ACL check, a -D file could be left lying around. This kind of configuration
2211 error no longer causes Exim to die; instead it causes a defer errror. The
2212 incident is still logged to the main and panic logs.
2214 74. Buglet left over from Exim 3 conversion. The message "too many messages
2215 in one connection" was written to the rejectlog but not the mainlog, except
2216 when address rewriting (yes!) was being logged.
2218 75. Added write_rejectlog option.
2220 76. When a system filter was run not as root (that is, when system_filter_user
2221 was set), the values of the $n variables were not being returned to the
2222 main process; thus, they were not subsequently available in the $sn
2225 77. Added +return_path_on_delivery log selector.
2227 78. A connection timeout was being treated differently from recipients deferred
2228 when testing hosts_max_try with a message that was older than the host's
2229 retry timeout. (The host should not be counted, thus allowing all hosts to
2230 be tried at least once before bouncing.) This may have been the cause of an
2231 occasionally reported bug whereby a message would remain on the queue
2232 longer than the retry timeout, but would be bounced if a delivery was
2233 forced. I say "may" because I never totally pinned down the problem;
2234 setting up timeout/retry tests is difficult. See also the next item.
2236 79. The ultimate address timeout was not being applied to errors that involved
2237 a combination of host plus message (for example, a timeout on a MAIL
2238 command). When an address resolved to a number of possible hosts, and they
2239 were not all tried for each delivery (e.g. because of hosts_max_try), a
2240 message could remain on the queue longer than the retry timeout.
2242 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2245 81. Fixed an obscure SMTP outgoing bug which required at least the following
2246 conditions: (a) there was another message waiting for the same server;
2247 (b) the server returned 5xx to all RCPT commands in the first message so
2248 that the message was not completed; (c) the server dropped the connection
2249 or gave a negative response to the RSET that Exim sends to abort the
2250 transaction. The observed case was a dropped connection after DATA that had
2251 been sent in pipelining mode. That is, the server had advertised PIPELINING
2252 but was not implementing it correctly. The effect of the bug was incorrect
2253 behaviour, such as trying another host, and this could lead to a crash.
2259 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2260 and daemon.c were passed as pointers to ints; they should have been
2261 pointers to socklen_t variables (which are typically unsigned ints).
2263 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2266 3. Fixed a really odd bug that affected only the testing scheme; patching a
2267 certain fixed string in the binary changed the value of another string that
2268 happened to be identical to the end of the original first string.
2270 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2271 name", it returns that address as the IP address. On some operating
2272 systems (e.g. Solaris), it also passes back the IP address string as the
2273 "host name". However, on others (e.g. Linux), it passes back an empty
2274 string. Exim wasn't checking for this, and was changing the host name to an
2275 empty string, assuming it had been canonicized.
2277 5. Although rare, it is permitted to have more than one PTR record for a given
2278 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2279 all the names associated with an address, because they do in Solaris.
2280 However, it seems that they do not in Linux for data that comes from the
2281 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2282 I found this out when I moved to a new Linux workstation and tried to run
2283 the Exim test suite.
2285 To get round this problem I have changed the code so that it now does its
2286 own call to the DNS to look up PTR records when searching for a host name.
2287 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2288 addresses that are only in /etc/hosts are still found.
2290 This behaviour is, however, controlled by an option called host_lookup_
2291 order, which defaults to "bydns:byaddr". If people want to use the other
2292 order, or indeed, just use one or the other means of lookup, they can
2293 specify it in this variable.
2295 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2296 some operating systems, this comes back from gethostbyaddr() as an empty
2297 string, and this is what Exim used to test for. However, it seems that in
2298 other systems, "." is yielded. Exim now tests for this case too.
2300 7. The values of check_spool_space and check_log_space are now held internally
2301 as a number of kilobytes instead of an absolute number of bytes. If a
2302 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2303 kilobyte. This means that much larger values can be stored.
2305 8. Exim monitor: an attempt to get the action menu when not actually pointing
2306 at a message produces an empty menu entitled "No message selected". This
2307 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2308 no entries in it ("Shell widget menu has zero width and/or height"). So I
2309 have added a single, blank menu entry in this case.
2311 9. Added ${quote_local_part.
2313 10. MIME decoding is now applied to the contents of Subject: header lines when
2316 11. Now that a reference to $sender_host_address automatically causes a reverse
2317 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2318 host lookup before query-style lookups in lists that might use this
2319 variable. This has therefore been abolished, and the "net-" prefix is no
2320 longer necessary for query-style lookups.
2322 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2323 have been a typo for LFLAGS, so it has been changed.
2325 13. The install script calls Exim with "-C /dev/null" in order to find the
2326 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2327 to be output. Howeve, since Exim outputs its version number before the
2328 error, it didn't break the script. It just looked ugly. I fixed this by
2329 always allowing "-C /dev/null" if the caller is root.
2331 14. Ignore overlarge ACL variable number when reading spool file - insurance
2332 against a later release with more variables having written the file.
2334 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2335 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2336 this, as well as the form without the "IPv6" on the front.
2338 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2339 OS/Makefile-Darwin file.
2341 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2342 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2344 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2345 variable. However, some OS use ints for inodes. I've added cast to long int
2346 to get rid of the compiler warning.
2348 19. I had forgotten to lock out "/../" in configuration file names when
2349 ALT_CONFIG_PREFIX was set.
2351 20. Routers used for verification do not need to specify transports. However,
2352 if such a router generated a host list, and callout was configured, Exim
2353 crashed, because it could not find a port number from the (non-existent)
2354 transport. It now assumes port 25 in this circumstance.
2356 21. Added the -t option to exigrep.
2358 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2359 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2360 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2361 them is set, LOOKUP_LSEARCH is forced.
2363 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2365 24. Added sender and host information to the "rejected by local_scan()" log
2366 line; previously there was no indication of these.
2368 25. Added .include_if_exists.
2370 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2371 Linux. It turns out that not all file systems support this. Apparently some
2372 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2373 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2374 not supported on the file descriptor, is now ignored when Exim is trying to
2375 sync a directory. This applies only to Linux.
2377 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2379 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2380 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2383 29. Added support for maildirsize files from supplied patch (modified a bit).
2385 30. The use of :fail: followed by an empty string could lead Exim to respond to
2386 sender verification failures with (e.g.):
2388 550 Verification failed for <xxx>
2389 550 Sender verify failed
2391 where the first response line was missing the '-' that indicates it is not
2392 the final line of the response.
2394 31. The loop for finding the name of the user that called Exim had a hardwired
2395 limit of 10; it now uses the value of finduser_retries, which is used for
2396 all other user lookups.
2398 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2401 33. Exim was neglecting to zero errno before one call of strtol() when
2402 expanding a string and expecting an integer value. On some systems this
2403 resulted in spurious "integer overflow" errors. Also, it was casting the
2404 result into an int without checking.
2406 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2407 did not work. The code looks as if it has *never* worked, though it appears
2408 to have been documented since at least releast 1.62. I have made it work.
2410 35. The "timeout_DNS" error in retry rules, also documented since at least
2411 1.62, also never worked. As it isn't clear exactly what this means, and
2412 clearly it isn't a major issue, I have abolished the feature by treating it
2413 as "timeout", and writing a warning to the main and panic logs.
2415 36. The display of retry rules for -brt wasn't always showing the error code
2418 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2419 timeout_connect_A, timeout_connect_MX.
2421 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2422 to the empty sender.
2424 39. The daemon was not analysing the content of -oX till after it had closed
2425 stderr and disconnected from the controlling terminal. This meant that any
2426 syntax errors were only noted on the panic log, and the return code from
2427 the command was 0. By re-arranging the code a little, I've made the
2428 decoding happen first, so such errors now appear on stderr, and the return
2429 code is 1. However, the actual setting up of the sockets still happens in
2430 the disconnected process, so errors there are still only recorded on the
2433 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2434 connections (as happens on some IP stacks) was logged at start up time as
2435 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2436 it from "IPv6 and IPv4", which means that two separate sockets are being
2439 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2440 says whether AF_INET or AF_INET6 was passed as an argument.
2442 42. Exiwhat output was messed up when time zones were included in log
2445 43. Exiwhat now gives more information about the daemon's listening ports,
2446 and whether -tls-on-connect was used.
2448 44. The "port" option of the smtp transport is now expanded.
2450 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2451 silently ignored. Now an error message is written to the main and panic
2454 46. There's a new ACL modifier called "logwrite" which writes to a log file
2455 as soon as it is encountered.
2457 47. Added $local_user_uid and $local_user_gid at routing time.
2459 48. Exim crashed when trying to verify a sender address that was being
2462 49. Exim was recognizing only a space character after ".include". It now also
2463 recognizes a tab character.
2465 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2466 extracting the relevant information from the specification. The man page no
2467 longer contains scrambled data for the -d option, and I've added a section
2468 at the front about calling Exim under different names.
2470 51. Added "extra_headers" argument to the "mail" command in filter files.
2472 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2475 53. Installed eximstats 1.29.
2477 54. Added transport_filter_timeout as a generic transport option.
2479 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2480 Cc: header lines. This was required by RFC 822, but it not required by RFC
2483 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2484 incoming messages that did not have them. Now it does so only if the
2485 message originates locally, that is, if there is no associated remote host
2486 address. When Resent- header lines are present, this applies to the Resent-
2487 lines rather than the non-Resent- lines.
2489 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2490 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2492 58. Messages for configuration errors now include the name of the main
2493 configuration file - useful now that there may be more than one file in a
2494 list (.included file names were always shown).
2496 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2497 for those rare installations that do not start the daemon as root or run it
2498 setuid root. I've cut out the call to initgroups() if the daemon is not
2501 60. The Exim user and group can now be bound into the binary as text strings
2502 that are looked up at the start of Exim's processing.
2504 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2506 62. Added $mailstore_basename variable.
2508 63. Installed patch to sieve.c from Michael Haardt.
2510 64. When Exim failed to open the panic log after failing to open the main log,
2511 the original message it was trying to log was written to stderr and debug
2512 output, but if they were not available (the usual case in production), it
2513 was lost. Now it is written to syslog before the two lines that record the
2514 failures to open the logs.
2516 65. Users' Exim filters run in subprocesses under the user's uid. It is
2517 possible for a "deliver" command or an alias in a "personal" command to
2518 provoke an address rewrite. If logging of address rewriting is configured,
2519 this fails because the process is not running as root or exim. There may be
2520 a better way of dealing with this, but for the moment (because 4.30 needs
2521 to be released), I have disabled address rewrite logging when running a
2522 filter in a non-root, non-exim process.
2528 1. The buildconfig auxiliary program wasn't quoting the value set for
2529 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2530 not defined. This bug was masked in 4.22 by the effect that was fixed in
2533 2. Some messages that were rejected after a message id was allocated were
2534 shown as "incomplete" by exigrep. It no longer does this for messages that
2535 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2537 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2538 have allow_domain_literals set, the ID did not get logged in the <= line.
2539 Domain literals are now always recognized in Message-ID: header lines.
2541 4. The first argument for a ${extract expansion item is the key name or field
2542 number. Leading and trailing spaces in this item were not being ignored,
2543 causing some misleading effects.
2545 5. When deliver_drop_privilege was set, single queue runner processes started
2546 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2547 same command in the process it spins off) were not dropping privilege.
2549 6. When the daemon running as "exim" started a queue runner, it always
2550 re-executed Exim in the spun-off process. This is a waste of effort when
2551 deliver_drop_privilege is set. The new process now just calls the
2552 queue-runner function directly.
2558 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2561 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2562 ignored. Though the use of -oP was forcing the writing of a pid file, it
2563 was always written to the default place.
2565 3. If the message "no IP address found for host xxxx" is generated during
2566 incoming verification, it is now followed by identification of the incoming
2567 connection (so you can more easily find what provoked it).
2569 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2571 5. Added some features to "harden" Exim a bit more against certain attacks:
2573 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2574 be put in Local/Makefile. This is like the never_users runtime option,
2575 but it cannot be overridden. The default setting is "root".
2577 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2578 prefix string with which any file named in a -C command line option
2581 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2582 is retained for -C and -D only if the caller of Exim is root. Without
2583 it, the exim user may also use -C and -D and retain privilege.
2585 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2586 command line option is disabled.
2588 6. Macro names set by the -D option must start with an upper case letter, just
2589 like macro names defined in the configuration file.
2591 7. Added "dereference=" facility to LDAP.
2593 8. Two instances of the typo "uknown" in the source files are fixed.
2595 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2596 the Configure-Makefile script screwed up while processing it.
2598 10. Incorporated PCRE 4.4.
2600 11. The SMTP synchronization check was not operating right at the start of an
2601 SMTP session. For example, it could not catch a HELO sent before the client
2602 waited for the greeting. There is now a check for outstanding input at the
2603 point when the greeting is written. Because of the duplex, asynchronous
2604 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2605 way, but not yet received, when the check is performed.
2607 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2608 on TCP/IP sockets, because this apparently causes some broken clients to
2611 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2612 unchanged) from the Cygwin maintainer.
2614 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2615 was supported instead of testing for mbx. Effectively a typo.
2617 15. The spa authenticator server code was not checking that the input it
2618 received was valid base64.
2620 16. The debug output line for the "set" modifier in ACLs was not showing the
2621 name of the variable that was being set.
2623 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2625 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2626 lookup on its own. Something else was needed to trigger the lookup. For
2627 example, a match in host_lookup or the need for a host name in a host list.
2628 Now, if $sender_host_name is referenced and the host name has not yet been
2629 looked up, a lookup is performed. If the lookup fails, the variable remains
2630 empty, and $host_lookup_failed is set to "1".
2632 19. Added "eqi" as a case-independent comparison operator.
2634 20. The saslauthd authentication condition could segfault if neither service
2635 nor realm was specified.
2637 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2638 error message that was logged was misleading, and incoming SMTP
2639 connections were dropped. The message is now more accurate, and temporary
2640 errors are given to SMTP connections.
2642 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2643 (except RSET) with a 421 error, until QUIT is received. However, it was
2644 failing to send a response to QUIT.
2646 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2647 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2648 ACL is now run after the helo_try_verify_hosts code.
2650 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2651 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2652 case-independent, so other case variants are also recognized). Apparently
2653 some systems use these upper case variants.
2655 25. If more than two messages were waiting for the same host, and a transport
2656 filter was specified for the transport, Exim sent two messages over the
2657 same TCP/IP connection, and then failed with "socket operation on non-
2658 socket" when it tried to send the third.
2660 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2662 27. The extern definition of crypt16() in expand.c was not being excluded when
2663 the OS had its own crypt16() function.
2665 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2666 as a preferred synonym for return_size_limit, both as an option and as an
2669 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2671 30. Changed the default configuration ACL to relax the local part checking rule
2672 for addresses that are not in any local domains. For these addresses,
2673 slashes and pipe symbols are allowed within local parts, but the sequence
2674 /../ is explicitly forbidden.
2676 31. SPA server authentication was not clearing the challenge buffer before
2679 32. log_message in a "warn" ACL statement was writing to the reject log as
2680 well as to the main log, which contradicts the documentation and doesn't
2681 seem right (because no rejection is happening). So I have stopped it.
2683 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2684 However, I am unable to do any testing of this.
2686 34. Fixed an infelicity in the appendfile transport. When checking directories
2687 for a mailbox, to see if any needed to be created, it was accidentally
2688 using path names with one or more superfluous leading slashes; tracing
2689 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2691 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2692 contents are added to the log line that is written for every discarded
2693 recipient. (Previously a log_message setting was ignored.)
2695 36. The ${quote: operator now quotes the string if it is empty.
2697 37. The install script runs exim in order to find its version number. If for
2698 some reason other than non-existence or emptiness, which it checks, it
2699 could not run './exim', it was installing it with an empty version number,
2700 i.e. as "exim-". This error state is now caught, and the installation is
2703 38. An argument was missing from the function that creates an error message
2704 when Exim fails to connect to the socket for saslauthd authentication.
2705 This could cause Exim to crash, or give a corrupted message.
2707 39. Added isip, isip4, and isip6 to ${if conditions.
2709 40. The ACL variables $acl_xx are now saved with the message, and can be
2710 accessed later in routers, transports, and filters.
2712 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2713 strings in the file are not string-expanded.
2715 42. If a MAIL command specified a SIZE value that was too large to fit into an
2716 int variable, the check against message_size_limit failed. Such values are
2717 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2718 day this will have to be increased, but I don't think I want to be around
2719 when emails are that large.
2726 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2727 iconv() is not standard in FreeBSD.
2729 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2730 IPv6 enabled. The observed symptom was a segmentation fault on return from
2731 the function os_common_find_running_interfaces() in src/os.c.
2733 3. In the check_special_case() function in daemon.c I had used "errno" as an
2734 argument name, which causes warnings on some systems. This was basically a
2735 typo, since it was named "eno" in the comments!
2737 4. The code that waits for the clock to tick (at a resolution of some fraction
2738 of a second) so as to ensure message-id uniqueness was always waiting for
2739 at least one whole tick, when it could have waited for less. [This is
2740 almost certainly not relevant at current processor speeds, where it is
2741 unlikely to ever wait at all. But we try to future-proof.]
2743 5. The function that sleeps for a time interval that includes fractions of a
2744 second contained a race. It did not block SIGALRM between setting the
2745 timer, and suspending (a couple of lines later). If the interval was short
2746 and the sigsuspend() was delayed until after it had expired, the suspension
2747 never ended. On busy systems this could lead to processes getting stuck for
2750 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2751 process, before it forks any delivery processes. The open lookup caching
2752 mechanism meant that the open file or database connection was passed into
2753 the delivery process. The problem was that delivery processes always tidy
2754 up cached lookup data. This could cause a problem for the next delivery
2755 process started by the queue runner, because the external queue runner
2756 process does not know about the closure. So the next delivery process
2757 still has data in the lookup cache. In the case of a file lookup, there was
2758 no problem because closing a file descriptor in a subprocess doesn't affect
2759 the parent. However, if the lookup was caching a connection to a database,
2760 the connection was closed, and the second delivery process was likely to
2761 see errors such as "PGSQL: query failed: server closed the connection
2762 unexpectedly". The problem has been fixed by closing all cached lookups
2763 in a queue runner before running a delivery process.
2765 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2766 seem to have the "const" qualifier which it has on other OS. I've
2769 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2770 *of the same type* (client or server) with the same public name that an
2771 error should be diagnosed.
2773 9. When Exim looked up a host name for an IP address, but failed to find the
2774 original IP address when looking up the host name (a safety check), it
2775 output the message "<ip address> does not match any IP for NULL", which was
2776 confusing, to say the least. The bug was that the host name should have
2777 appeared instead of "NULL".
2779 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
2780 user that is built into the binary, and the -C or -D options is used, root
2781 privilege is dropped before the configuration file is read. In addition,
2782 logging is switched to stderr instead of the normal log files. If the
2783 configuration then re-defines the Exim user, the unprivileged environment
2784 is probably not what is expected, so Exim logs a panic warning message (but
2787 However, if deliver_drop_privilege is set, the unprivileged state may well
2788 be exactly what is intended, so the warning has been cut out in that case,
2789 and Exim is allowed to try to write to its normal log files.
2795 1. smtp_return_error_details was not giving details for temporary sender
2796 or receiver verification errors.
2798 2. Diagnose a configuration error if two authenticators have the same public
2801 3. Exim used not to create the message log file for a message until the first
2802 delivery attempt. This could be confusing when incoming messages were held
2803 for policy or load reasons. The message log file is now created at the time
2804 the message is received, and an initial "Received" line is written to it.
2806 4. The automatically generated man page for command line options had a minor
2807 bug that caused no ill effects; however, a more serious problem was that
2808 the procedure for building the man page automatically didn't always
2809 operate. Consequently, release 4.20 contains an out-of-date version. This
2810 shouldn't happen again.
2812 5. When building Exim with embedded Perl support, the script that builds the
2813 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2814 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2816 6. The freeze_tell option was not being used for messages that were frozen on
2817 arrival, either by an ACL or by local_scan().
2819 7. Added the smtp_incomplete_transaction log selector.
2821 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2822 was accepting AUTH without a new EHLO.
2824 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2825 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2828 10. Logging of TCP/IP connections (when configured) now happens in the main
2829 daemon process instead of the child process, so that the TCP/IP connection
2830 count is more accurate (but it can never be perfect).
2832 11. The use of "drop" in a nested ACL was not being handled correctly in the
2833 outer ACL. Now, if condition failure induced by the nested "drop" causes
2834 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2835 or "require"), the connection is dropped.
2837 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2838 that yield "discard" can now be used with an "accept" or a "discard" verb,
2839 but an error is generated for any others (because I can't see a useful way
2840 to define what should happen).
2842 13. When an ACL is read dynamically from a file (or anywhere else), the lines
2843 are now processed in the same way as lines in the Exim configuration file.
2844 In particular, continuation lines are supported.
2846 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2848 15. Added -ti meaning -t -i.
2850 16. Check for letters, digits, hyphens, and dots in the names of dnslist
2851 domains, and warn by logging if others are found.
2853 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
2854 returned from GIFCONF when Exim is trying to find the list of interfaces on
2855 a host. The code in os.c has been modified to copy each ifreq to an aligned
2856 structure in all cases.
2858 Also, in some cases, the returned ifreq's were being copied to a 'struct
2859 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2860 means the last couple of bytes of an IPv6 address could be chopped if the
2861 ifreq contained only a normal sockaddr (14 bytes storage).
2863 18. Named domain lists were not supported in the hosts_treat_as_local option.
2864 An entry such as +xxxx was not recognized, and was treated as a literal
2867 19. Ensure that header lines added by a DATA ACL are included in the reject log
2868 if the ACL subsequently rejects the message.
2870 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
2871 MD5 (which is deprecated).
2873 21. When testing a filter file using -bf, Exim was writing a message when it
2874 took the sender from a "From " line in the message, but it was not doing so
2875 when it took $return_path from a Return-Path: header line. It now does.
2877 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2878 with a valid header line field name (a series of printing characters
2879 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
2881 23. Changed "disc" in the source to "disk" to conform to the documentation and
2882 the book and for uniformity.
2884 24. Ignore Sendmail's -Ooption=value command line item.
2886 25. When execve() failed while trying to run a command in a pipe transport,
2887 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2888 could be confused with a return value of 69 from the command itself. This
2889 has been changed to 127, the value the shell returns if it is asked to run
2890 a non-existent command. The wording for the related log line suggests a
2891 non-existent command as the problem.
2893 26. If received_header_text expands to an empty string, do not add a Received:
2894 header line to the message. (Well, it adds a token one on the spool, but
2895 marks it "old" so that it doesn't get used or transmitted.)
2897 27. Installed eximstats 1.28 (addition of -nt option).
2899 28. There was no check for failure on the call to getsockname() in the daemon
2900 code. This can fail if there is a shortage of resources on the system, with
2901 ENOMEM, for example. A temporary error is now given on failure.
2903 29. Contrary to the C standard, it seems that in some environments, the
2904 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2905 program. Exim now does this explicitly; it affects the formatting of
2906 timestamps using strftime().
2908 30. If exiqsumm was given junk data, it threw up some uninitialized variable
2909 complaints. I've now initialized all the variables, to avoid this.
2911 32. Header lines added by a system filter were not being "seen" during
2912 transport-time rewrites.
2914 33. The info_callback() function passed to OpenSSL is set up with type void
2915 (*)(SSL *, int, int), as described somewhere. However, when calling the
2916 function (actually a macro) that sets it up, the type void(*)() is
2917 expected. I've put in a cast to prevent warnings from picky compilers.
2919 34. If a DNS black list lookup found a CNAME record, but there were no A
2920 records associated with the domain it pointed at, Exim crashed.
2922 35. If a DNS black list lookup returned more than one A record, Exim ignored
2923 all but the first. It now scans all returned addresses if a particular IP
2924 value is being sought. In this situation, the contents of the
2925 $dnslist_value variable are a list of all the addresses, separated by a
2928 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
2929 to accept a host name and all its aliases if the forward lookup for any of
2930 them yielded the IP address of the incoming connection. Now it accepts only
2931 those names whose forward lookup yields the correct IP address. Any other
2932 names are discarded. This closes a loophole whereby a rogue DNS
2933 administrator could create reverse DNS records to break through a
2934 wildcarded host restriction in an ACL.
2936 37. If a user filter or a system filter that ran in a subprocess used any of
2937 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2938 the wrong values were passed to the pipe command ($thisaddress had the
2939 value of $0, $0 had the value of $1, etc). This bug was introduced by
2940 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
2942 38. Improved the line breaking for long SMTP error messages from ACLs.
2943 Previously, if there was no break point between 40 and 75 characters, Exim
2944 left the rest of the message alone. Two changes have been made: (a) I've
2945 reduced the minimum length to 35 characters; (b) if it can't find a break
2946 point between 35 and 75 characters, it looks ahead and uses the first one
2947 that it finds. This may give the occasional overlong line, but at least the
2948 remaining text gets split now.
2950 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2951 file descriptors might be low, and that setting 1000 would always raise it.
2952 It turns out that in some environments, the limit is already over 1000 and
2953 that lowering it causes trouble. So now Exim takes care not to decrease it.
2955 40. When delivering a message, the value of $return_path is set to $sender_
2956 address at the start of routing (routers may change the value). By an
2957 oversight, this default was not being set up when an address was tested by
2958 -bt or -bv, which affected the outcome if any router or filter referred to
2961 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
2962 log only when "message" or "log_message" are set. However, if one of the
2963 conditions was an address verification, or a call to a nested ACL, the
2964 messages generated by the underlying test were being passed through. This
2965 no longer happens. The underlying message is available in $acl_verify_
2966 message for both "message" and "log_message" expansions, so it can be
2967 passed through if needed.
2969 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
2970 new expansion $bh_ to give the encoded byte string without charset
2971 translation. Translation happens only if iconv() is available; HAVE_ICONV
2972 indicates this at build time. HEADERS_CHARSET gives the charset to
2973 translate to; headers_charset can change it in the configuration, and
2974 "headers charset" can change it in an individual filter file.
2976 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
2977 that creates RFC 2047 encoded "words" labels them as that charset instead
2978 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
2979 expansion operator; (ii) when Exim creates a From: line for a local
2980 message; (iii) when a header line is rewritten to include a "phrase" part.
2982 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
2983 buggy, causing it to skip the first lines of messages whose message ID
2984 ended in 'D'. This would not have bitten before Exim release 4.14, because
2985 message IDs were unlikely to end in 'D' before then. The effect was to have
2986 incorrect size information for certain domains.
2988 45. #include "config.h" was missing at the start of the crypt16.c module. This
2989 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
2992 46. If there was a timeout during a "random" callout check, Exim treated it as
2993 a failure of the random address, and carried on sending RSET and the real
2994 address. If the delay was just some slowness somewhere, the response to the
2995 original RCPT would be taken as a response to RSET and so on, causing
2996 mayhem of various kinds.
2998 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
2999 when I implemented it. It didn't allow for the fact that some option values
3000 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3001 the right test for positive values.
3003 48. Domain names in DNS records are case-independent. Exim always looks them up
3004 in lower case. Some resolvers return domain names in exactly the case they
3005 appear in the zone file, that is, they may contain uppercase letters. Not
3006 all resolvers do this - some return always lower case. Exim was treating a
3007 change of case by a resolver as a change of domain, similar to a widening
3008 of a domain abbreviation. This triggered its re-routing code and so it was
3009 trying to route what was effectively the same domain again. This normally
3010 caused routing to fail (because the router wouldn't handle the domain
3011 twice). Now Exim checks for this case specially, and just changes the
3012 casing of the domain that it ultimately uses when it transmits the message
3015 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3018 50. If a filter generated a file delivery with a non-absolute name (possible if
3019 no home directory exists for the router), the forbid_file option was not
3022 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3023 the existing equality matching.
3025 52. Exim was using ints instead of ino_t variables in some places where it was
3026 dealing with inode numbers.
3028 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3029 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3030 called TMPDIR, and if it finds it is different, it changes its value.
3032 54. The smtp_printf() function is now made available to local_scan() so
3033 additional output lines can be written before returning. There is also an
3034 smtp_fflush() function to enable the detection of a dropped connection.
3035 The variables smtp_input and smtp_batched_input are exported to
3038 55. Changed the default runtime configuration: the message "Unknown user"
3039 has been removed from the ACL, and instead placed on the localuser router,
3040 using the cannot_route_message feature. This means that any verification
3041 failures that generate their own messages won't get overridden. Similarly,
3042 the "Unrouteable address" message that was in the ACL for unverifiable
3043 relay addresses has also been removed.
3045 56. Added hosts_avoid_esmtp to the smtp transport.
3047 57. The exicyclog script was not checking for the esoteric option
3048 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3049 will work only if exicyclog is run under the appropriate euid.
3051 58. Following a discussion on the list, the rules by which Exim recognises line
3052 endings on incoming messages have been changed. The -dropcr and drop_cr
3053 options are now no-ops, retained only for backwards compatibility. The
3054 following line terminators are recognized: LF CRLF CR. However, special
3055 processing applies to CR:
3057 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3058 nor a local message in the state where . is a terminator.
3060 (ii) If a bare CR is encountered in a header line, an extra space is added
3061 after the line terminator so as not to end the header. The reasoning
3062 behind this is that bare CRs in header lines are most likely either
3063 to be mistakes, or people trying to play silly games.
3065 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3066 was being incorrectly given as 18 bytes larger than it should have been.
3067 This is a VOB (very old bug).
3069 60. This may never have affected anything current, but just in case it has:
3070 When the local host is found other than at the start of a list of hosts,
3071 the local host, those with the same MX, and any that follow, are discarded.
3072 When the list in question was part of a longer list of hosts, the following
3073 hosts (not currently being processed) were also being discarded. This no
3074 longer happens. I'm not sure if this situation could ever has previously
3077 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3080 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3081 header. This is something that is recommended in a new Internet Draft, and
3082 is something that is documented as being done by Sendmail. There are two
3083 possible values. For messages generated by the autoreply transport, Exim
3086 Auto-Submitted: auto-replied
3088 whereas for all other generated messages (e.g. bounces) it adds
3090 Auto-Submitted: auto-generated
3092 63. The "personal" condition in filters now includes a test for the
3093 Auto-Submitted: header. If it contains the string "auto-" the message it
3094 not considered personal.
3096 64. Added rcpt_include_affixes as a generic transport option.
3098 65. Added queue_only_override (default true).
3100 66. Added the syslog_duplication option.
3102 67. If what should have been the first header line of a message consisted of
3103 a space followed by a colon, Exim was mis-interpreting it as a header line.
3104 It isn't of course - it is syntactically invalid and should therefore be
3105 treated as the start of the message body. The misbehaviour could have
3106 caused a number of strange effects, including loss of data in subsequent
3107 header lines, and spool format errors.
3109 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3110 client host had authenticated. This control can now be exercised by an ACL
3111 for more flexibility.
3113 69. By default, callouts do not happen when testing with -bh. There is now a
3114 variant, -bhc, which does actually run the callout code, including
3115 consulting and updating the callout cache.
3117 70. Added support for saslauthd authentication, courtesy of Alexander
3120 71. If statvfs() failed on the spool or log directories while checking their
3121 size for availability, Exim confusingly gave the error "space shortage".
3122 Furthermore, in debugging mode it crashed with a floating point exception.
3123 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3124 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3125 serious problem, Exim now writes to the main and panic logs when this
3126 happens, with details of the failure. It then refuses to accept the
3127 incoming message, giving the message "spool directory problem" or "log
3128 directory problem" with a 421 code for SMTP messages.
3130 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3131 0, 1, and 2 exist, because some OS complain for execs without them (see
3132 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3133 descriptors. However, the code omitted to check that the open succeeded,
3134 causing mysterious errors if for some reason the permissions on /dev/null
3135 got screwed. Now Exim writes a message to the main and panic logs, and
3136 bombs out if it can't open /dev/null.
3138 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3139 interact so that it is all more flexible. It is supposed to remain
3140 backwards compatible. Also added extra_local_interfaces.
3142 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3143 to bomb out with an assertion failure - to the client this appears as a
3144 connection drop. This problem occurs in the part of the code that was taken
3145 from the Samba project. Fortunately, the assertion is in a very simple
3146 function, so I have fixed this by reproducing the function inline in the
3147 one place where it is called, and arranging for authentication to fail
3148 instead of killing the process with assert().
3150 75. The SPA client code was not working when the server requested OEM rather
3151 than Unicode encoding.
3153 76. Added code to make require_files with a specific uid setting more usable in
3154 the case where statting the file as root fails - usually a non-root-mounted
3155 NFS file system. When this happens and the failure is EACCES, Exim now
3156 forks a subprocess and does the per-uid checking as the relevant uid.
3158 77. Added process_log_path.
3160 78. If log_file_path was not explicitly set, a setting of check_log_space or
3161 check_log_inodes was ignored.
3163 79. If a space check for the spool or log partitions fails, the incident is now
3164 logged. Of course, in the latter case the data may get lost...
3166 80. Added the %p formatting code to string_format() so that it can be used to
3167 print addresses in debug_print(). Adjusted all the address printing in the
3168 debugging in store.c to use %p rather than %d.
3170 81. There was a concern that a line of code in smtp_in.c could overflow a
3171 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3172 initially expressed, the concern was not well-founded, because trailing
3173 spaces are removed early. However, if the trailing spaces were followed by
3174 a NULL, they did not get removed, so the overflow was possible. Two fixes
3177 (a) I re-wrote the offending code in a cleaner fashion.
3178 (b) If an incoming SMTP command contains a NULL character, it is rejected
3181 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3182 runs initgroups(), so that if the Exim user is in any additional groups,
3183 they will be used during message reception.
3189 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob