1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.198 2005/08/03 09:29:24 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TK/01 Added the "success_on_redirect" address verification option. See
10 NewStuff for rationale and an example.
12 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
14 PH/02 Patch to exigrep to allow it to work on syslog lines.
16 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
17 fread() to skip over the body file's header line, because in Cygwin the
18 header line is locked and is inaccessible.
20 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
21 co-exist for some time) to make it clear that it is the Exim ID that is
22 referenced, not the Message-ID: header line.
24 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
25 string_format() function, because snprintf() does not exist on all
28 PH/06 The use of forbid_filter_existstest now also locks out the use of the
29 ${stat: expansion item.
31 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
32 protocol synchronization error", to keep the pedants happy.
34 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
35 well as for IRIX systems, when gcc is being used. See the host.c source
38 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
40 PH/10 Named domain lists were not working if used in a queue_smtp_domains
43 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
44 transport and to the smtp transport in LMTP mode.
46 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
48 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
49 run a filter in a subprocess. This could lead to confusion in subsequent
50 lookups in the parent process. There should also be a search_tidyup() at
51 the end of the subprocess.
53 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
54 only if the host matched helo_try_verify_hosts, which caused the
55 verification to occur when the EHLO/HELO command was issued. The ACL just
56 tested the remembered result. Now, if a previous verification attempt has
57 not happened, "verify = helo" does it there and then.
59 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
61 TK/03 Fix log output including CR from clamd.
67 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
69 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
70 command itself ended in error, the underlying message about the transport
71 filter timeout was being overwritten with the pipe command error. Now the
72 underlying error message should be appended to the second error message.
74 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
76 PH/02 Reduce the amount of output that "make" produces by default. Full output
77 can still be requested.
79 PH/03 The warning log line about a condition test deferring for a "warn" verb
80 was being output only once per connection, rather than after each
81 occurrence (because it was using the same function as for successful
82 "warn" verbs). This seems wrong, so I have changed it.
84 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
85 it should not have, which might have caused a crash in the right
86 circumstances, but probably never did.
88 PH/04 Installed a modified version of Tony Finch's patch to make submission
89 mode fix the return path as well as the Sender: header line, and to
90 add a /name= option so that you can make the user's friendly name appear
93 TF/03 Added the control = fakedefer ACL modifier.
95 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
96 Mark Lowes for thorough testing.
98 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
100 TK/03 Merged latest SRS patch from Miles Wilton.
102 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
103 with the definition in sysexits.h (which is #included earlier).
104 Fortunately, Exim does not actually use EX_OK. The code used to try to
105 preserve the sysexits.h value, by assumimg that macro definitions were
106 scanned for macro replacements. I have been disabused of this notion,
107 so now the code just undefines EX_OK before #including unistd.h.
109 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
110 in the smtp transport. When a block could not be written in a single
111 write() function, the timeout was being re-applied to each part-write.
112 This seems wrong - if the receiver was accepting one byte at a time it
113 would take for ever. The timeout is now adjusted when this happens. It
114 doesn't have to be particularly precise.
116 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
117 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
119 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
120 without a domain if the check to <postmaster@domain> fails.
122 SC/01 Eximstats: added -xls and the ability to specify output files
123 (patch written by Frank Heydlauf).
125 SC/02 Eximstats: use FileHandles for outputing results.
127 SC/03 Eximstats: allow any combination of xls, txt, and html output.
129 SC/04 Eximstats: fixed display of large numbers with -nvr option
131 SC/05 Eximstats: fixed merging of reports with empty tables.
133 SC/06 Eximstats: added the -include_original_destination flag
135 SC/07 Eximstats: removed tabs and trailing whitespace.
137 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
139 TK/06 MBOX spool code: Add real "From " MBOX separator line
140 so the .eml file is really in mbox format (even though
141 most programs do not really care). Patch from Alex Miller.
143 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
144 The latter is generated from $received_to and is only set if the
145 message has one envelope recipient. SA can use these headers,
146 obviously out-of-the-box. Patch from Alex Miller.
148 PH/08 The ${def test on a variable was returning false if the variable's
149 value was "0", contrary to what the specification has always said!
150 The result should be true unless the variable is empty.
152 PH/09 The syntax error of a character other than { following "${if
153 def:variable_name" (after optional whitespace) was not being diagnosed.
154 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
155 accidental colon was present, for example, could give incorrect results.
157 PH/10 Tidied the code in a number of places where the st_size field of a stat()
158 result is used (not including appendfile, where other changes are about
161 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
162 This involved changing a lot of size variables from int to off_t. It
163 should work with maildirs and everything.
165 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
166 spamd dying while we are connected to it.
168 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
171 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
172 function for BDB 4.3.
174 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
176 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
177 the sources for PCRE have been re-arranged and more files are now
180 PH/15 The code I had for printing potentially long long variables in PH/11
181 above was not the best (it lost precision). The length of off_t variables
182 is now inspected at build time, and an appropriate printing format (%ld
183 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
184 to be "long long int" or "long int". This is needed for the internal
185 formatting function string_vformat().
187 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
188 the configuration file to be ":syslog", then the script "guesses" where
189 the logs files are, rather than using the compiled in default. In our
190 case the guess is not the same as the compiled default, so the script
191 suddenly stopped working when I started to use syslog. The patch checks
192 to see if log_file_path is "". If so, it attempts to read it from exim
193 with no configuration file to get the compiled in version, before it
194 falls back to the previous guessing code."
196 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
197 implementing BATV in an Exim configuration. See NewStuff for the gory
200 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
201 Makefile that are specific to HP-UX.
203 PH/18 If the "use_postmaster" option was set for a recipient callout together
204 with the "random" option, the postmaster address was used as the MAIL
205 FROM address for the random test, but not for the subsequent recipient
206 test. It is now used for both.
208 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
209 patch removes a few documentation additions to RFC 3028, because the
210 latest draft now contains them. It adds the new en;ascii-case comparator
211 and a new error check for 8bit text in MIME parts. Comparator and
212 require names are now matched exactly. I enabled the subaddress
213 extension, but it is not well tested yet (read: it works for me)."
215 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
216 rework some of the code of TK/09 above to avoid the hardwired use of
217 "%lld" and "long long". Replaced the call to snprintf() with a call to
220 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
221 records point to non-existent hosts", "retry timeout exceeded", and
222 "retry time not reached for any host after a long failure period".
224 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
225 experimental DomainKeys support:
227 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
228 (2) On an error such as an illegally used "control", the wrong name for
229 the control was given.
231 These problems did NOT occur unless DomainKeys support was compiled.
233 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
235 PH/24 Added ${if match_ip condition.
237 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
238 databases so that it will be absolutely obvious if a crash occurs in the
239 DB library. This is a regular occurrence (often caused by mis-matched
242 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
243 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
244 picked up on a user's system that detects such things. There doesn't seem
245 to be a gcc warning option for this - only an attribute that has to be
246 put on the function's prototype. It seems that in Fedora Core 4 they have
247 set this on a number of new functions. No doubt there will be more in due
250 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
251 specify a transport. However, if an address that was verified by such a
252 router was the subject of a callout, Exim crashed because it tried to
253 read the rcpt_include_affixes from the non-existent transport. Now it
254 just assumes that the setting of that option is false. This bug was
255 introduced by 4.51/PH/31.
257 PH/28 Changed -d+all to exclude +memory, because that information is very
258 rarely of interest, but it makes the output a lot bigger. People tend to
259 do -d+all out of habit.
261 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
262 code in os-type was giving problems when libc.so lives in lib64, like on
265 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
266 aren't the modern standard, and it seems that some systems' include files
267 don't always have them. Exim was already checking for some of the newer
268 ones like T_AAAA, and defining it itself. I've added checks for all the
269 record types that Exim uses.
271 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
272 not automatically generating a new one, as it is supposed to. This
273 prevented TLS from working. If the file did exist, but contained invalid
274 data, a new version was generated, as expected. It was only the case of a
275 non-existent file that was broken.
277 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
278 with a change in libdomainkeys > 0.64.
280 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
281 from DNS. If the selector record carries the flag, it now has
282 precedence over the domain-wide flag.
284 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
286 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
287 the use of a port name that isn't defined in /etc/services) occurred, the
288 message was deferred as in a normal delivery, and thus remained on the
289 spool, instead of being failed because of the mua_wrapper setting. This
290 is now fixed, and I tidied up some of the mua_wrapper messages at the
293 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
294 the messages in a hash of arrays rather than using individual hashes.
295 This is a bit cleaner and results in dramatic memory savings, albeit
296 at a slight CPU cost.
298 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
299 as requested by Marc Sherman.
301 SC/10 Eximstats: added histograms for user specified patterns as requested
304 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
306 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
307 fopen() in the content-scanning modules that did not already have it.
313 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
314 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
316 TK/02 Fix ACL "control" statement not being available in MIME ACL.
318 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
320 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
321 to test Sieve filters that use "vacation".
323 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
324 that changes the way the GnuTLS parameters are stored in the cache file.
325 The new format can be generated externally. For backward compatibility,
326 if the data in the cache doesn't make sense, Exim assumes it has read an
327 old-format file, and it generates new data and writes a new file. This
328 means that you can't go back to an older release without removing the
331 PH/03 A redirect router that has both "unseen" and "one_time" set does not
332 work if there are any delivery delays because "one_time" forces the
333 parent to be marked "delivered", so its unseen clone is never tried
334 again. For this reason, Exim now forbids the simultaneous setting of
337 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
338 redirected to themselves ("homonym" addresses). Read the long ChangeLog
339 entry if you want to know the details. The fix, however, neglected to
340 consider the case when local delivery batching is involved. The test for
341 "previously delivered" was not happening when checking to see if an
342 address could be batched with a previous (undelivered) one; under
343 certain circumstances this could lead to multiple deliveries to the same
346 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
347 in its include files, and this causes problems building Exim.
349 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
350 header_syntax) but Exim was just ignoring anything given after a slash.
351 In particular, this caused confusion with an attempt to use "verify =
352 reverse_host_lookup/defer_ok". An error is now given when options are
353 supplied for verify items that do not have them. (Maybe reverse_host_
354 lookup should have a defer_ok option, but that's a different point.)
356 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
357 defined by RFC 821) to 2048, because there were problems with some AUTH
358 commands, and RFC 1869 says the size should be increased for extended
359 SMTP commands that take arguments.
361 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
364 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
365 "unknown" error; now it says that the functionality isn't in the binary.
367 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
368 an address' error message when a string expansion fails (syntax or
369 whatever). Otherwise the password may appear in the log. Following change
370 PH/42 below, there is no longer a chance of it appearing in a bounce
373 PH/11 Installed exipick version 20050225.0 from John Jetmore.
375 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
376 of its addresses was ever tried. (Bugzilla bug #2.)
378 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
379 the result incorrectly in the debug output. (It correctly added a newline
380 to what was transported.)
382 TF/01 Added $received_time.
384 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
385 commented out examples of how to interface to a virus scanner and to
386 SpamAssassin. Also added commented examples of av_scanner and
387 spamd_address settings.
389 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
390 and controls are allowed in which ACLs. There were a couple of minor
391 errors. Some of the entries in the conditions table (which is a table of
392 where they are NOT allowed) were getting very unwieldy; rewrote them as a
393 negation of where the condition IS allowed.
395 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
397 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
398 header file does not have a version number, so I've had to invent a new
399 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
400 API. The code is untested by me (my Linux distribution still has 0.3.2 of
401 radiusclient), but it was contributed by a Radius user.
403 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
404 files or directories, for OpenSSL.
406 PH/19 When an Exim process that is running as root has to create an Exim log
407 file, it does so in a subprocess that runs as exim:exim so as to get the
408 ownership right at creation (otherwise, other Exim processes might see
409 the file with the wrong ownership). There was no test for failure of this
410 fork() call, which would lead to the process getting stuck as it waited
411 for a non-existent subprocess. Forks do occasionally fail when resources
412 run out. I reviewed all the other calls to fork(); they all seem to check
415 PH/20 When checking for unexpected SMTP input at connect time (before writing
416 the banner), Exim was not dealing correctly with a non-positive return
417 from the read() function. If the client had disconnected by this time,
418 the result was a log entry for a synchronization error with an empty
419 string after "input=" when read() returned zero. If read() returned -1
420 (an event I could not check), uninitialized data bytes were printed.
421 There were reports of junk text (parts of files, etc) appearing after
424 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
426 PH/22 Added support for macro redefinition, and (re)definition in between
427 driver and ACL definitions.
429 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
430 forgetting to use the resulting value; it was using the unexpanded value.
432 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
433 hadn't been configured. The fix is from Juergen Kreileder, who
434 understands it better than I do:
436 "Here's what I see happening with three configured cyrus_sasl
437 authenticators configured (plain, login, cram-md5):
439 On startup auth_cyrus_sasl_init() gets called for each of these.
440 This means three calls to sasl_listmech() without a specified mech_list.
441 => SASL tests which mechs of all available mechs actually work
442 => three warnings about OTP not working
443 => the returned list contains: plain, login, cram-md5, digest-md5, ...
445 With the patch, sasl_listmech() also gets called three times. But now
446 SASL's mech_list option is set to the server_mech specified in the the
447 authenticator. Or in other words, the answer from sasl_listmech()
448 gets limited to just the mech you're testing for (which is different
450 => the return list contains just 'plain' or 'login', 'cram-md5' or
451 nothing depending on the value of ob->server_mech.
453 I've just tested the patch: Authentication still works fine,
454 unavailable mechs specified in the exim configuration are still
455 caught, and the auth.log warnings about OTP are gone."
457 PH/25 When debugging is enabled, the contents of the command line are added
458 to the debugging output, even when log_selector=+arguments is not
461 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
462 answer is "GNU", and only if the return is "GNU/something" is the answer
465 PH/27 $acl_verify_message is now set immediately after the failure of a
466 verification in an ACL, and so is available in subsequent modifiers. In
467 particular, the message can be preserved by coding like this:
469 warn !verify = sender
470 set acl_m0 = $acl_verify_message
472 Previously, $acl_verify_message was set only while expanding "message"
473 and "log_message" when a very denied access.
475 PH/28 Modified OS/os.c-Linux with
477 -#ifndef OS_LOAD_AVERAGE
478 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
480 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
481 nomenclature these days.)
483 PH/29 Installed patch from the Sieve maintainer that adds the options
484 sieve_useraddress and sieve_subaddress to the redirect router.
486 PH/30 In these circumstances:
487 . Two addresses routed to the same list of hosts;
488 . First host does not offer TLS;
489 . First host accepts first address;
490 . First host gives temporary error to second address;
491 . Second host offers TLS and a TLS session is established;
492 . Second host accepts second address.
493 Exim incorrectly logged both deliveries with the TLS parameters (cipher
494 and peerdn, if requested) that were in fact used only for the second
497 PH/31 When doing a callout as part of verifying an address, Exim was not paying
498 attention to any local part prefix or suffix that was matched by the
499 router that accepted the address. It now behaves in the same way as it
500 does for delivery: the affixes are removed from the local part unless
501 rcpt_include_affixes is set on the transport.
503 PH/32 Add the sender address, as F=<...>, to the log line when logging a
504 timeout during the DATA phase of an incoming message.
506 PH/33 Sieve envelope tests were broken for match types other than :is. I have
507 applied a patch sanctioned by the Sieve maintainer.
509 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
510 the uid or gid is negative. A case of a negative gid caused this to be
511 noticed. The fix allows for either to be negative.
513 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
514 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
517 PH/36 The change PH/12 above was broken. Fixed it.
519 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
520 the grounds that routing the same address twice would always produce the
521 same answer. This might have been true once, but it is certainly no
522 longer true now. Routing a child address may depend on the previous
523 routing that produced that child. Some complicated redirection strategies
524 went wrong when messages had multiple recipients, and made Exim's
525 behaviour dependent on the order in which the addresses were given.
527 I have moved the duplicate checking until after the routing is complete.
528 Exim scans the addresses that are assigned to local and remote
529 transports, and removes any duplicates. This means that more work will be
530 done, as duplicates will always all be routed, but duplicates are
531 presumably rare, so I don't expect this is of any significance.
533 For deliveries to pipes, files, and autoreplies, the duplicate checking
534 still happens during the routing process, since they are not going to be
537 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
538 It corrects a timeout issue with spamd. This is Ian's comment: "The
539 background is that sometimes spamd either never reads data from a
540 connection it has accepted, or it never writes response data. The exiscan
541 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
542 blindly assumes that writes won't block so it may never time out."
544 PH/39 Allow G after quota size as well as K and M.
546 PH/40 The value set for $authenticated_id in an authenticator may not contain
547 binary zeroes or newlines because the value is written to log lines and
548 to spool files. There was no check on this. Now the value is run through
549 the string_printing() function so that such characters are converted to
550 printable escape sequences.
552 PH/41 $message_linecount is a new variable that contains the total number of
553 lines in the message. Compare $body_linecount, which is the count for the
556 PH/42 Exim no longer gives details of delivery errors for specific addresses in
557 bounce and delay warning messages, except in certain special cases, which
560 (a) An SMTP error message from a remote host;
561 (b) A message specified in a :fail: redirection;
562 (c) A message specified in a "fail" command in a system filter;
563 (d) A message specified in a FAIL return from the queryprogram router;
564 (e) A message specified by the cannot_route_message router option.
566 In these cases only, Exim does include the error details in bounce and
567 warning messages. There are also a few cases where bland messages such
568 as "unrouteable address" or "local delivery error" are given.
570 PH/43 $value is now also set for the "else" part of a ${run expansion.
572 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
573 being worked on, but at least Exim now implements the latest version to
576 PH/45 In a pipe transport, although a timeout while waiting for the pipe
577 process to complete was treated as a delivery failure, a timeout while
578 writing the message to the pipe was logged, but erroneously treated as a
579 successful delivery. Such timeouts include transport filter timeouts. For
580 consistency with the overall process timeout, these timeouts are now
581 treated as errors, giving rise to delivery failures by default. However,
582 there is now a new Boolean option for the pipe transport called
583 timeout_defer, which, if set TRUE, converts the failures into defers for
584 both kinds of timeout. A transport filter timeout is now identified in
587 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
588 systems where "make" and "gmake" are different, calling "gmake" at top
589 level broke things. I've arranged for the value of $(MAKE) to be passed
590 from the Makefile to this script so that it can call the same version of
594 A note about Exim versions 4.44 and 4.50
595 ----------------------------------------
597 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
598 changes of various kinds. As a consequence, a big documentation update was
599 needed. This delayed the release for rather longer than seemed good, especially
600 in the light of a couple of (minor) security issues. Therefore, the changes
601 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
602 release. So 4.44 and 4.50 are in effect two different branches that both start
605 I have left the 4.50 change log unchanged; it contains all the changes since
606 4.43. The change log for 4.44 is below; many of its items are identical to
607 those for 4.50. This seems to be the most sensible way to preserve the
608 historical information.
614 1. Minor wording change to the doc/README.SIEVE file.
616 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
617 computation of the current number of files was incorrect.
619 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
620 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
623 4. Give more explanation in the error message when the command for a transport
624 filter fails to execute.
626 5. There are several places where Exim runs a non-Exim command in a
627 subprocess. The SIGUSR1 signal should be disabled for these processes. This
628 was being done only for the command run by the queryprogram router. It is
629 now done for all such subprocesses. The other cases are: ${run, transport
630 filters, and the commands run by the lmtp and pipe transports.
632 6. Added CONFIGURE_GROUP build-time option.
634 7. Some older OS have a limit of 256 on the maximum number of file
635 descriptors. Exim was using setrlimit() to set 1000 as a large value
636 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
637 systems. I've change it so that if it can't get 1000, it tries for 256.
639 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
640 was an oversight, and furthermore, ever since the addition of extra
641 controls (e.g. 4.43/32), the checks on when to allow different forms of
642 "control" were broken. There should now be diagnostics for all cases when a
643 control that does not make sense is encountered.
645 9. Added the /retain_sender option to "control=submission".
647 10. $recipients is now available in the predata ACL (oversight).
649 11. Tidy the search cache before the fork to do a delivery from a message
650 received from the command line. Otherwise the child will trigger a lookup
651 failure and thereby defer the delivery if it tries to use (for example) a
652 cached ldap connection that the parent has called unbind on.
654 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
655 of $address_data from the recipient verification was clobbered by the
658 13. The value of address_data from a sender verification is now available in
659 $sender_address_data in subsequent conditions in the ACL statement.
661 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
663 15. Added a new option "connect=<time>" to callout options, to set a different
666 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
667 was its contents. (It was OK if the option was not defined at all.)
669 17. A "Completed" log line is now written for messages that are removed from
670 the spool by the -Mrm option.
672 18. New variables $sender_verify_failure and $recipient_verify_failure contain
673 information about exactly what failed.
675 19. Added -dd to debug only the daemon process.
677 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
678 handles timeouts, both on the server side and network timeouts. Renamed the
679 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
681 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
682 It is now set to "smtps".
684 22. $host_address is now set to the target address during the checking of
687 23. When checking ignore_target_hosts for an ipliteral router, no host name was
688 being passed; this would have caused $sender_host_name to have been used if
689 matching the list had actually called for a host name (not very likely,
690 since this list is usually IP addresses). A host name is now passed as
693 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
694 code that specifies a non-restarting handler (typically sigaction() in
695 modern systems) in an attempt to fix a rare and obscure crash bug.
697 25. Narrowed the window for a race in the daemon that could cause it to ignore
698 SIGCHLD signals. This is not a major problem, because they are used only to
699 wake it up if nothing else does.
701 26. A malformed maildirsize file could cause Exim to calculate negative values
702 for the mailbox size or file count. Odd effects could occur as a result.
703 The maildirsize information is now recalculated if the size or filecount
706 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
707 support for a long time. Removed HAVE_SYS_VFS_H.
709 28. Installed the latest version of exipick from John Jetmore.
711 29. In an address list, if the pattern was not a regular expression, an empty
712 subject address (from a bounce message) matched only if the pattern was an
713 empty string. Non-empty patterns were not even tested. This was the wrong
714 because it is perfectly reasonable to use an empty address as part of a
715 database query. An empty address is now tested by patterns that are
716 lookups. However, all the other forms of pattern expect the subject to
717 contain a local part and a domain, and therefore, for them, an empty
718 address still always fails if the pattern is not itself empty.
720 30. Exim went into a mad DNS loop when attempting to do a callout where the
721 host was specified on an smtp transport, and looking it up yielded more
724 31. Re-factored the code for checking spool and log partition space into a
725 function that finds that data and another that does the check. The former
726 is then used to implement four new variables: $spool_space, $log_space,
727 $spool_inodes, and $log_inodes.
729 32. The RFC2047 encoding function was originally intended for short strings
730 such as real names; it was not keeping to the 75-character limit for
731 encoded words that the RFC imposes. It now respects the limit, and
732 generates multiple encoded words if necessary. To be on the safe side, I
733 have increased the buffer size for the ${rfc2047: expansion operator from
736 33. It is now permitted to omit both strings after an "if" condition; if the
737 condition is true, the result is "true". As before, when the second string
738 is omitted, a false condition yields an empty string. This makes it less
739 cumbersome to write custom ACL and router conditions.
741 34. Failure to deliver a bounce message always caused it to be frozen, even if
742 there was an errors_to setting on the router. The errors_to setting is now
745 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
746 canonical form (fully expanded) before being placed in
747 $sender_host_address.
749 36. The table in the code that translates DNS record types into text (T_A to
750 "A" for instance) was missing entries for NS and CNAME. It is just possible
751 that this could have caused confusion if both these types were looked up
752 for the same domain, because the text type is used as part of Exim's
753 per-process caching. But the chance of anyone hitting this buglet seems
756 37. The dnsdb lookup has been extended in a number of ways.
758 (1) There is a new type, "zns", which walks up the domain tree until it
759 finds some nameserver records. It should be used with care.
761 (2) There is a new type, "mxh", which is like "mx" except that it returns
762 just the host names, not the priorities.
764 (3) It is now possible to give a list of domains (or IP addresses) to be
765 looked up. The behaviour when one of the lookups defers can be
766 controlled by a keyword.
768 (4) It is now possible to specify the separator character for use when
769 multiple records are returned.
771 38. The dnslists ACL condition has been extended: it is now possible to supply
772 a list of IP addresses and/or domains to be looked up in a particular DNS
775 39. Added log_selector=+queue_time_overall.
777 40. When running the queue in the test harness, wait just a tad after forking a
778 delivery process, to get repeatability of debugging output.
780 41. Include certificate and key file names in error message when GnuTLS fails
781 to set them up, because the GnuTLS error message doesn't include the name
782 of the failing file when there is a problem reading it.
784 42. Allow both -bf and -bF in the same test run.
786 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
788 44. The "Exiscan patch" is now merged into the mainline Exim source.
790 45. Sometimes the final signoff response after QUIT could fail to get
791 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
792 < 0 before doing a fflush(). This bug looks as though it goes back to the
793 introduction of TLS in release 3.20, but "sometimes" must have been rare
794 because the tests only now provoked it.
796 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
797 (this can affect the format of dates).
799 47. exim_tidydb, when checking for the continued existence of a message for
800 which it has found a message-specific retry record, was not finding
801 messages that were in split spool directories. Consequently, it was
802 deleting retry records that should have stayed in existence.
804 48. Steve fixed some bugs in eximstats.
806 49. The SPA authentication driver was not abandoning authentication and moving
807 on to the next authenticator when an expansion was forced to fail,
808 contradicting the general specification for all authenticators. Instead it
809 was generating a temporary error. It now behaves as specified.
811 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
812 (the order specifies the preference for clients). The order is now AES256,
813 AES128, 3DES, ARCFOUR128.
815 51. Small patch to Sieve code - explicitly set From: when generating an
818 52. Exim crashed if a remote delivery caused a very long error message to be
819 recorded - for instance if somebody sent an entire SpamAssassin report back
820 as a large number of 550 error lines. This bug was coincidentally fixed by
821 increasing the size of one of Exim's internal buffers (big_buffer) that
822 happened as part of the Exiscan merge. However, to be on the safe side, I
823 have made the code more robust (and fixed the comments that describe what
826 53. Now that there can be additional text after "Completed" in log lines (if
827 the queue_time_overall log selector is set), a one-byte patch to exigrep
828 was needed to allow it to recognize "Completed" as not the last thing in
831 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
832 patch that reportedly fixes this has been added. I am not expert enough to
833 create a test for it. This is what the patch creator wrote:
835 "I found a little strange behaviour of ldap code when working with
836 Windows 2003 AD Domain, where users was placed in more than one
837 Organization Units. When I tried to give exim partial DN, the exit code
838 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
839 But simultaneously result of request was absolutely normal ldap result,
840 so I produce this patch..."
842 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
843 REFERENCE, so I have modified the code to exclude the patch when that macro
846 55. Some experimental protocols are using DNS PTR records for new purposes. The
847 keys for these records are domain names, not reversed IP addresses. The
848 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
849 leaves it alone. Component reversal etc. now happens only for IP addresses.
852 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
854 57. Double the size of the debug message buffer (to 2048) so that more of very
855 long debug lines gets shown.
857 58. The exicyclog utility now does better if the number of log files to keep
858 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
860 59. Two changes related to the smtp_active_hostname option:
862 (1) $smtp_active_hostname is now available as a variable.
863 (2) The default for smtp_banner uses $smtp_active_hostname instead
864 of $primary_hostname.
866 60. The host_aton() function is supposed to be passed a string that is known
867 to be a valid IP address. However, in the case of IPv6 addresses, it was
868 not checking this. This is a hostage to fortune. Exim now panics and dies
869 if the condition is not met. A case was found where this could be provoked
870 from a dnsdb PTR lookup with an IPv6 address that had more than 8
871 components; fortuitously, this particular loophole had already been fixed
872 by change 4.50/55 above.
874 If there are any other similar loopholes, the new check in host_aton()
875 itself should stop them being exploited. The report I received stated that
876 data on the command line could provoke the exploit when Exim was running as
877 exim, but did not say which command line option was involved. All I could
878 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
882 61. There was a buffer overflow vulnerability in the SPA authentication code
883 (which came originally from the Samba project). I have added a test to the
884 spa_base64_to_bits() function which I hope fixes it.
887 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
888 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
890 63. The daemon start-up calls getloadavg() while still root for those OS that
891 need the first call to be done as root, but it missed one case: when
892 deliver_queue_load_max is set with deliver_drop_privilege. This is
893 necessary for the benefit of the queue runner, because there is no re-exec
894 when deliver_drop_privilege is set.
896 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
899 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
900 was in use, was not putting the data itself into the right store pool;
901 consequently, it could be overwritten for a subsequent message in the same
902 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
905 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
907 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
908 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
909 the function were treating the return as a boolean value, which happened to
910 work because 0=false and not-0=true, but is not correct code.
912 68. The host_aton() function was not handling scoped IPv6 addresses (those
913 with, for example, "%eth0" on the end) correctly.
915 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
916 negated items (that is, ~something) in unsigned ints. Some compilers
917 apparently mutter when there is no cast.
919 70. If an address verification called from an ACL failed, and did not produce a
920 user-specific message (i.e. there was only a "system" message), nothing was
921 put in $acl_verify_message. In this situation, it now puts the system
924 71. Change 4.23/11 added synchronization checking at the start of an SMTP
925 session; change 4.31/43 added the unwanted input to the log line - except
926 that it did not do this in the start of session case. It now does.
928 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
929 This is wrong and can cause the other end to generate a synchronization
930 error if it is another Exim or anything else that does the synchronization
931 check. A QUIT command is no longer sent after a timeout.
933 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
936 74. The defer_ok option of callout verification was not working if it was used
937 when verifying addresses in header lines, that is, for this case:
939 verify = header_sender/callout=defer_ok
941 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
942 those file descriptors could be used for SMTP connections. If anything
943 wrote to stderr (the example that came up was "warn" in embedded Perl), it
944 could be sent to the SMTP client, causing chaos. The daemon now opens
945 stdin, stdout, and stderr to /dev/null when it puts itself into the
948 76. Arrange for output from Perl's "warn" command to be written to Exim's main
949 log by default. The user can override this with suitable Perl magic.
951 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
952 the log message when discard triggers, was not working for the DATA ACL or
953 for the non-SMTP ACL.
955 78. Error message wording change in sieve.c.
957 79. If smtp_accept_max_per_host was set, the number of connections could be
958 restricted to fewer than expected, because the daemon was trying to set up
959 a new connection before checking whether the processes handling previous
960 connections had finished. The check for completed processes is now done
961 earlier. On busy systems, this bug wouldn't be noticed because something
962 else would have woken the daemon, and it would have reaped the completed
965 80. If a message was submitted locally by a user whose login name contained one
966 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
967 It caused a spool format error. I have fixed the spool reading code. A
968 related problem was that the "from" clause in the Received: line became
969 illegal because of the space(s). It is now covered by ${quote_local_part.
971 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
974 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
976 83. Patch from Sieve maintainer to fix unterminated string problem in
979 84. Some minor changes to the Linux configuration files to help with other
980 OS variants using glibc.
982 85. One more patch for Sieve to update vacation handling to latest spec.
985 ----------------------------------------------------
986 See the note above about the 4.44 and 4.50 releases.
987 ----------------------------------------------------
993 1. Change 4.43/35 introduced a bug that caused file counts to be
994 incorrectly computed when quota_filecount was set in an appendfile
997 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
998 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1001 3. Give more explanation in the error message when the command for a transport
1002 filter fails to execute.
1004 4. There are several places where Exim runs a non-Exim command in a
1005 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1006 was being done only for the command run by the queryprogram router. It is
1007 now done for all such subprocesses. The other cases are: ${run, transport
1008 filters, and the commands run by the lmtp and pipe transports.
1010 5. Some older OS have a limit of 256 on the maximum number of file
1011 descriptors. Exim was using setrlimit() to set 1000 as a large value
1012 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1013 systems. I've change it so that if it can't get 1000, it tries for 256.
1015 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1016 was an oversight, and furthermore, ever since the addition of extra
1017 controls (e.g. 4.43/32), the checks on when to allow different forms of
1018 "control" were broken. There should now be diagnostics for all cases when a
1019 control that does not make sense is encountered.
1021 7. $recipients is now available in the predata ACL (oversight).
1023 8. Tidy the search cache before the fork to do a delivery from a message
1024 received from the command line. Otherwise the child will trigger a lookup
1025 failure and thereby defer the delivery if it tries to use (for example) a
1026 cached ldap connection that the parent has called unbind on.
1028 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1029 of $address_data from the recipient verification was clobbered by the
1030 sender verification.
1032 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1033 was its contents. (It was OK if the option was not defined at all.)
1035 11. A "Completed" log line is now written for messages that are removed from
1036 the spool by the -Mrm option.
1038 12. $host_address is now set to the target address during the checking of
1039 ignore_target_hosts.
1041 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1042 being passed; this would have caused $sender_host_name to have been used if
1043 matching the list had actually called for a host name (not very likely,
1044 since this list is usually IP addresses). A host name is now passed as
1047 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1048 code that specifies a non-restarting handler (typically sigaction() in
1049 modern systems) in an attempt to fix a rare and obscure crash bug.
1051 15. Narrowed the window for a race in the daemon that could cause it to ignore
1052 SIGCHLD signals. This is not a major problem, because they are used only to
1053 wake it up if nothing else does.
1055 16. A malformed maildirsize file could cause Exim to calculate negative values
1056 for the mailbox size or file count. Odd effects could occur as a result.
1057 The maildirsize information is now recalculated if the size or filecount
1060 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1061 support for a long time. Removed HAVE_SYS_VFS_H.
1063 18. Updated exipick to current release from John Jetmore.
1065 19. Allow an empty sender to be matched against a lookup in an address list.
1066 Previously the only cases considered were a regular expression, or an
1069 20. Exim went into a mad DNS lookup loop when doing a callout where the
1070 host was specified on the transport, if the DNS lookup yielded more than
1073 21. The RFC2047 encoding function was originally intended for short strings
1074 such as real names; it was not keeping to the 75-character limit for
1075 encoded words that the RFC imposes. It now respects the limit, and
1076 generates multiple encoded words if necessary. To be on the safe side, I
1077 have increased the buffer size for the ${rfc2047: expansion operator from
1080 22. Failure to deliver a bounce message always caused it to be frozen, even if
1081 there was an errors_to setting on the router. The errors_to setting is now
1084 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1085 canonical form (fully expanded) before being placed in
1086 $sender_host_address.
1088 24. Updated eximstats to version 1.33
1090 25. Include certificate and key file names in error message when GnuTLS fails
1091 to set them up, because the GnuTLS error message doesn't include the name
1092 of the failing file when there is a problem reading it.
1094 26. Expand error message when OpenSSL has problems setting up cert/key files.
1097 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1098 (this can affect the format of dates).
1100 28. exim_tidydb, when checking for the continued existence of a message for
1101 which it has found a message-specific retry record, was not finding
1102 messages that were in split spool directories. Consequently, it was
1103 deleting retry records that should have stayed in existence.
1105 29. eximstats updated to version 1.35
1106 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1107 1.35 - bugfix such that pie charts by volume are generated correctly
1109 30. The SPA authentication driver was not abandoning authentication and moving
1110 on to the next authenticator when an expansion was forced to fail,
1111 contradicting the general specification for all authenticators. Instead it
1112 was generating a temporary error. It now behaves as specified.
1114 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1115 (the order specifies the preference for clients). The order is now AES256,
1116 AES128, 3DES, ARCFOUR128.
1118 31. Small patch to Sieve code - explicitly set From: when generating an
1121 32. Exim crashed if a remote delivery caused a very long error message to be
1122 recorded - for instance if somebody sent an entire SpamAssassin report back
1123 as a large number of 550 error lines. This bug was coincidentally fixed by
1124 increasing the size of one of Exim's internal buffers (big_buffer) that
1125 happened as part of the Exiscan merge. However, to be on the safe side, I
1126 have made the code more robust (and fixed the comments that describe what
1129 33. Some experimental protocols are using DNS PTR records for new purposes. The
1130 keys for these records are domain names, not reversed IP addresses. The
1131 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1132 leaves it alone. Component reversal etc. now happens only for IP addresses.
1135 34. The host_aton() function is supposed to be passed a string that is known
1136 to be a valid IP address. However, in the case of IPv6 addresses, it was
1137 not checking this. This is a hostage to fortune. Exim now panics and dies
1138 if the condition is not met. A case was found where this could be provoked
1139 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1140 components; fortuitously, this particular loophole had already been fixed
1141 by change 4.50/55 or 4.44/33 above.
1143 If there are any other similar loopholes, the new check in host_aton()
1144 itself should stop them being exploited. The report I received stated that
1145 data on the command line could provoke the exploit when Exim was running as
1146 exim, but did not say which command line option was involved. All I could
1147 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1148 running as the user.
1151 35. There was a buffer overflow vulnerability in the SPA authentication code
1152 (which came originally from the Samba project). I have added a test to the
1153 spa_base64_to_bits() function which I hope fixes it.
1156 36. The daemon start-up calls getloadavg() while still root for those OS that
1157 need the first call to be done as root, but it missed one case: when
1158 deliver_queue_load_max is set with deliver_drop_privilege. This is
1159 necessary for the benefit of the queue runner, because there is no re-exec
1160 when deliver_drop_privilege is set.
1162 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1163 was in use, was not putting the data itself into the right store pool;
1164 consequently, it could be overwritten for a subsequent message in the same
1165 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1168 38. Sometimes the final signoff response after QUIT could fail to get
1169 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1170 < 0 before doing a fflush(). This bug looks as though it goes back to the
1171 introduction of TLS in release 3.20, but "sometimes" must have been rare
1172 because the tests only now provoked it.
1178 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1179 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1180 Now it returns an integer. A number of calls were still expecting a T/F
1181 return. Fortuitously, in all cases, the tests worked in OK situations,
1182 which is the norm. However, things would have gone wrong on any write
1183 failures on the smtp file descriptor. This function is used when sending
1184 messages over SMTP and also when doing verify callouts.
1186 2. When Exim is called to do synchronous delivery of a locally submitted
1187 message (the -odf or -odi options), it no longer closes stderr before doing
1190 3. Implemented the mua_wrapper option.
1192 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1194 5. Implemented the functions header_remove(), header_testname(),
1195 header_add_at_position(), and receive_remove_recipient(), and exported them
1198 6. If an ACL "warn" statement specified the addition of headers, Exim already
1199 inserted X-ACL-Warn: at the start if there was no header name. However, it
1200 was not making this test for the second and subsequent header lines if
1201 there were newlines in the string. This meant that an invalid header could
1202 be inserted if Exim was badly configured.
1204 7. Allow an ACL "warn" statement to add header lines at the start or after all
1205 the Received: headers, as well as at the end.
1207 8. Added the rcpt_4xx retry error code.
1209 9. Added postmaster_mailfrom=xxx to callout verification option.
1211 10. Added mailfrom=xxxx to the callout verification option, for verify=
1214 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1215 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1217 12. Inserted some casts to stop certain compilers warning when using pointer
1218 differences as field lengths or precisions in printf-type calls (mostly
1219 affecting debugging statements).
1221 13. Added optional readline() support for -be (dynamically loaded).
1223 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1224 same clock tick as a message's arrival, so that its received time was the
1225 same as the "first fail" time on the retry record, and that message
1226 remained on the queue past the ultimate address timeout, every queue runner
1227 would try a delivery (because it was past the ultimate address timeout) but
1228 after another failure, the ultimate address timeout, which should have then
1229 bounced the address, did not kick in. This was a "< instead of <=" error;
1230 in most cases the first failure would have been in the next clock tick
1231 after the received time, and all would be well.
1233 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1234 being recognized when the domain list was tested by the match_domain
1235 condition in an expansion string.
1237 16. Added the ${str2b64: operator.
1239 17. Exim was always calling setrlimit() to set a large limit for the number of
1240 processes, without checking whether the existing limit was already
1241 adequate. (It did check for the limit on file descriptors.) Furthermore,
1242 errors from getrlimit() and setrlimit() were being ignored. Now they are
1243 logged to the main and panic logs, but Exim does carry on, to try to do its
1244 job under whatever limits there are.
1246 18. Imported PCRE 5.0.
1248 19. Trivial typo in log message " temporarily refused connection" (the leading
1251 20. If the log selector return_path_on_delivery was set and an address was
1252 redirected to /dev/null, the delivery process crashed because it assumed
1253 that a return path would always be set for a "successful" delivery. In this
1254 case, the whole delivery is bypassed as an optimization, and therefore no
1257 21. Internal re-arrangement: the function for sending a challenge and reading
1258 a response while authentication was assuming a zero-terminated challenge
1259 string. It's now changed to take a pointer and a length, to allow for
1260 binary data in such strings.
1262 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1264 23. Exim was not respecting finduser_retries when seeking the login of the
1265 uid under which it was called; it was always trying 10 times. (The default
1266 setting of finduser_retries is zero.) Also, it was sleeping after the final
1267 failure, which is pointless.
1269 24. Implemented tls_on_connect_ports.
1271 25. Implemented acl_smtp_predata.
1273 26. If the domain in control=submission is set empty, Exim assumes that the
1274 authenticated id is a complete email address when it generates From: or
1275 Sender: header lines.
1277 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1278 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1279 chown and chgrp in /bin and hostname in /usr/bin.
1281 28. Exim was keeping the "process log" file open after each use, just as it
1282 does for the main log. This opens the possibility of it remaining open for
1283 long periods when the USR1 signal hits a daemon. Occasional processlog
1284 errors were reported, that could have been caused by this. Anyway, it seems
1285 much more sensible not to leave this file open at all, so that is what now
1288 29. The long-running daemon process does not normally write to the log once it
1289 has entered its main loop, and it closes the log before doing so. This is
1290 so that log files can straightforwardly be renamed and moved. However,
1291 there are a couple of unusual error situations where the daemon does write
1292 log entries, and I had neglected to close the log afterwards.
1294 30. The text of an SMTP error response that was received during a remote
1295 delivery was being truncated at 512 bytes. This is too short for some of
1296 the long messages that one sometimes sees. I've increased the limit to
1299 31. It is now possible to make retry rules that apply only when a message has a
1300 specific sender, in particular, an empty sender.
1302 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1303 it possible to be selective about when SMTP synchronization is enforced.
1305 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1307 32. Implemented hosts_connection_nolog.
1309 33. Added an ACL for QUIT.
1311 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1314 35. Added mailbox_size and mailbox_filecount to appendfile.
1316 36. Added control = no_multiline_responses to ACLs.
1318 37. There was a bug in the logic of the code that waits for the clock to tick
1319 in the case where the clock went backwards by a substantial amount such
1320 that the microsecond fraction of "now" was more than the microsecond
1321 fraction of "then" (but the whole seconds number was less).
1323 38. Added support for the libradius Radius client library this is found on
1324 FreeBSD (previously only the radiusclient library was supported).
1330 1. When certain lookups returned multiple values in the form name=value, the
1331 quoting of the values was not always being done properly. Specifically:
1332 (a) If the value started with a double quote, but contained no whitespace,
1334 (b) If the value contained whitespace other than a space character (i.e.
1335 tabs or newlines or carriage returns) it was not quoted.
1336 This fix has been applied to the mysql and pgsql lookups by writing a
1337 separate quoting function and calling it from the lookup code. The fix
1338 should probably also be applied to nisplus, ibase and oracle lookups, but
1339 since I cannot test any of those, I have not disturbed their existing code.
1341 2. A hit in the callout cache for a specific address caused a log line with no
1342 reason for rejecting RCPT. Now it says "Previous (cached) callout
1343 verification failure".
1345 3. There was an off-by-one bug in the queryprogram router. An over-long
1346 return line was truncated at 256 instead of 255 characters, thereby
1347 overflowing its buffer with the terminating zero. As well as fixing this, I
1348 have increased the buffer size to 1024 (and made a note to document this).
1350 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1351 when Exim is waiting for an SMTP response from a remote server, Exim
1352 restarts its select() call on the socket, thereby resetting its timeout.
1353 This is not a problem when such interrupts are rare. Somebody set up a cron
1354 job to run exiwhat every 2 minutes, which is less than the normal select()
1355 timeout (5 or 10 minutes). This meant that the select() timeout never
1356 kicked in because it was always reset. I have fixed this by comparing the
1357 time when an interrupt arrives with the time at the start of the first call
1358 to select(). If more time than the timeout has elapsed, the interrupt is
1359 treated as a timeout.
1361 5. Some internal re-factoring in preparation for the addition of Sieve
1362 extensions (by MH). In particular, the "personal" test is moved to a
1363 separate function, and given an option for scanning Cc: and Bcc: (which is
1364 not set for Exim filters).
1366 6. When Exim created an email address using the login of the caller as the
1367 local part (e.g. when creating a From: or Sender: header line), it was not
1368 quoting the local part when it contained special characters such as @.
1370 7. Installed new OpenBSD configuration files.
1372 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1373 try to make them clearer.
1375 9. Callout options, other than the timeout value, were being ignored when
1376 verifying sender addresses in header lines. For example, when using
1378 verify = header_sender/callout=no_cache
1380 the cache was (incorrectly) being used.
1382 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1383 only the Cygwin environment.
1385 11. When return_path_on_delivery was set as a log selector, if different remote
1386 addresses in the same message used different return paths and parallel
1387 remote delivery occurred, the wrong values would sometimes be logged.
1388 (Whenever a remote delivery process finished, the return path value from
1389 the most recently started remote delivery process was logged.)
1391 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1392 lines when AUTH and/or TLS are in use. This is the "received protocol"
1393 field. Exim used to use "asmtp" for authenticated SMTP, without any
1394 indication (in the protocol name) for TLS use. Now it follows the RFC and
1395 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1396 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1397 names appear in log lines as well as in Received: header lines.
1399 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1400 extensions, and comparison tests, and to fix some bugs.
1402 14. Changes to the "personal" filter test:
1404 (1) The test was buggy in that it was just doing the equivalent of
1405 "contains" tests on header lines. For example, if a user's address was
1406 anne@some.where, the "personal" test would incorrectly be true for
1408 To: susanne@some.where
1410 This test is now done by extracting each address from the header in turn,
1411 and checking the entire address. Other tests that are part of "personal"
1412 are now done using regular expressions (for example, to check local parts
1413 of addresses in From: header lines).
1415 (2) The list of non-personal local parts in From: addresses has been
1416 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1417 taken from the Sieve specification recommendations.
1419 (3) If the message contains any header line starting with "List-" it is
1420 treated as non-personal.
1422 (4) The test for "circular" in the Subject: header line has been removed
1423 because it now seems ill-conceived.
1425 15. Minor typos in src/EDITME comments corrected.
1427 16. Installed latest exipick from John Jetmore.
1429 17. If headers_add on a router specified a text string that was too long for
1430 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1431 of string_sprintf() is now avoided.
1433 18. $message_body_size was not set (it was always zero) when running the DATA
1434 ACL and the local_scan() function.
1436 19. For the "mail" command in an Exim filter, no default was being set for
1437 the once_repeat time, causing a random time value to be used if "once" was
1438 specified. (If the value happened to be <= 0, no repeat happened.) The
1439 default is now 0s, meaning "never repeat". The "vacation" command was OK
1440 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1441 (I found it when inspecting the code).
1443 20. There is now an overall timeout for performing a callout verification. It
1444 defaults to 4 times the callout timeout, which applies to individual SMTP
1445 commands during the callout. The overall timeout applies when there is more
1446 than one host that can be tried. The timeout is checked before trying the
1447 next host. This prevents very long delays if there are a large number of
1448 hosts and all are timing out (e.g. when the network connections are timing
1449 out). The value of the overall timeout can be changed by specifying an
1450 additional sub-option for "callout", called "maxwait". For example:
1452 verify = sender/callout=5s,maxwait=20s
1454 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1455 to the end before writing, but this should make it even safer).
1457 22. Exim was forgetting that it had advertised PIPELINING for the second and
1458 subsequent messages on an SMTP connection. It was also not resetting its
1459 memory on STARTTLS and an internal HELO.
1461 23. When Exim logs an SMTP synchronization error within a session, it now
1462 records whether PIPELINING has been advertised or not.
1464 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1465 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1466 rather than long int.
1468 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1470 26. Added the never_mail option to autoreply.
1476 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1477 crash if the getsockname() call failed; this can happen if a connection is
1478 closed very soon after it is established. The problem was simply in the
1479 order in which certain operations were done, causing Exim to try to write
1480 to the SMTP stream before it had set up the file descriptor. The bug has
1481 been fixed by making things happen in the correct order.
1487 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1488 before the connection was closed, thus losing the rejection response.
1490 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1491 some early Solaris releases, but causes trouble in current releases where
1492 socklen_t is defined.
1494 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1497 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1500 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1501 that releasing the top of it at the end releases what was used for sub-
1502 expansions (unless the block got too big). However, discard this block if
1503 the first thing is a variable or header, so that we can use its block when
1504 it is dynamic (useful for very large $message_headers, for example).
1506 6. Lookups now cache *every* query, not just the most recent. A new, separate
1507 store pool is used for this. It can be recovered when all lookup caches are
1508 flushed. Lookups now release memory at the end of their result strings.
1509 This has involved some general refactoring of the lookup sources.
1511 7. Some code has been added to the store_xxx() functions to reduce the amount
1512 of flapping under certain conditions.
1514 8. log_incoming_interface used to affect only the <= reception log lines. Now
1515 it causes the local interface and port to be added to several more SMTP log
1516 lines, for example "SMTP connection from", and rejection lines.
1518 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1520 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1522 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1523 could be overwritten at the end of the current message (or the start of a
1524 new message if it was set in a HELO ACL). The value is now preserved for
1525 the duration of the SMTP connection.
1527 12. If a transport had a headers_rewrite setting, and a matching header line
1528 contained an unqualified address, that address was qualified, even if it
1529 did not match any rewriting rules. The underlying bug was that the values
1530 of the flags that permit the existence of unqualified sender and recipient
1531 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1532 non-local messages, and by -bnq for local messages) were not being
1533 preserved with the message after it was received.
1535 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1536 "next input=" as part of the text comprising the host identity instead of
1537 the correct text. The code was using the same buffer for two different
1538 strings. However, depending on which order the printing function evaluated
1539 its arguments, the bug did not always show up. Under Linux, for example, my
1540 test suite worked just fine.
1542 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1543 doesn't work with some older versions of Perl. It has been changed to "my",
1544 which in any case is probably the better facility to use.
1546 15. A really picky compiler found some instances of statements for creating
1547 error messages that either had too many or two few arguments for the format
1550 16. The size of the buffer for calls to the DNS resolver has been increased
1551 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1552 for addresses that have a lot of PTR records. This alleviates a problem; it
1553 does not fully solve it.
1555 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1556 buffer now truncates the list and logs the incident, which is the same
1557 action as happens when Exim is looking up a host name and its aliases.
1558 Previously in this situation something unpredictable would happen;
1559 sometimes it was "internal error: store_reset failed".
1561 18. If a server dropped the connection unexpectedly when an Exim client was
1562 using GnuTLS and trying to read a response, the client delivery process
1563 crashed while trying to generate an error log message.
1565 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1566 string, for example:
1568 warn message = H1: something\nH2: something
1570 the text was added as a single header line from Exim's point of view
1571 though it ended up OK in the delivered message. However, searching for the
1572 second and subsequent header lines using $h_h2: did not work. This has been
1573 fixed. Similarly, if a system filter added multiple headers in this way,
1574 the routers could not see them.
1576 20. Expanded the error message when iplsearch is called with an invalid key to
1577 suggest using net-iplsearch in a host list.
1579 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1580 ACLs are no longer actually imposed (and a message to that effect is
1583 22. If a "gecos" field in a passwd entry contained escaped characters, in
1584 particular, if it contained a \" sequence, Exim got it wrong when building
1585 a From: or a Sender: header from that name. A second bug also caused
1586 incorrect handling when an unquoted " was present following a character
1587 that needed quoting.
1589 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1590 was not being matched caselessly.
1592 24. Arranged for all hyphens in the exim.8 source to be escaped with
1595 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1596 properly. Recipient callout cache records were still being keyed to include
1597 the sender, even when use_sender was set false. This led to far more
1598 callouts that were necessary. The sender is no longer included in the key
1599 when use_sender is false.
1601 26. Added "control = submission" modifier to ACLs.
1603 27. Added the ${base62d: operator to decode base 62 numbers.
1605 28. dnsdb lookups can now access SRV records.
1607 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1608 the configuration file.
1610 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1611 (-v) mode. This makes the output for a verbose queue run more intelligible.
1613 31. Added a use_postmaster feature to recipient callouts.
1615 32. Added the $body_zerocount variable, containing the number of binary zero
1616 bytes in the message body.
1618 33. The time of last modification of the "new" subdirectory is now used as the
1619 "mailbox time last read" when there is a quota error for a maildir
1622 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1624 35. Added +ignore_unknown as a special item in host lists.
1626 36. Code for decoding IPv6 addresses in host lists is now included, even if
1627 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1628 address was recognized as an IP address, but was then not correctly decoded
1629 into binary, causing unexpected and incorrect effects when compared with
1636 1. Very minor rewording of debugging text in manualroute to say "list of
1637 hosts" instead of "hostlist".
1639 2. If verify=header_syntax was set, and a header line with an unqualified
1640 address (no domain) and a large number of spaces between the end of the
1641 name and the colon was received, the reception process suffered a buffer
1642 overflow, and (when I tested it) crashed. This was caused by some obsolete
1643 code that should have been removed. The fix is to remove it!
1645 3. When running in the test harness, delay a bit after writing a bounce
1646 message to get a bit more predictability in the log output.
1648 4. Added a call to search_tidyup() just before forking a reception process. In
1649 theory, someone could use a lookup in the expansion of smtp_accept_max_
1650 per_host which, without the tidyup, could leave open a database connection.
1652 5. Added the variables $recipient_data and $sender_data which get set from a
1653 lookup success in an ACL "recipients" or "senders" condition, or a router
1654 "senders" option, similar to $domain_data and $local_part_data.
1656 6. Moved the writing of debug_print from before to after the "senders" test
1659 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1660 problems for message scanning, either using a data ACL, or using
1661 local_scan() because the Received: header was not generated till after they
1662 were called (in order to set the time as the time of reception completion).
1663 I have revised the way this works. The header is now generated after the
1664 body is received, but before the ACL or local_scan() are called. After they
1665 are run, the timestamp in the header is updated.
1671 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1672 before starting a queue runner without re-exec. This happened only when
1673 deliver_drop_privilege was set or when the Exim user was set to root. The
1674 effect of the bug was that timeouts during subsequent deliveries caused
1675 crashes instead of being properly handled. The handler is now left at its
1676 default (and expected) setting.
1678 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1679 message, again when deliver_drop_privilege is set or Exim is run as root.
1680 The bug described in (1) was not present in this case, but the tidying up
1681 of the other signals was missing. I have made the two cases consistent.
1683 3. The ignore_target_hosts setting on a manualroute router was being ignored
1684 for hosts that were looked up using the /MX notation.
1686 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1689 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1690 operated on the sender address. After changing the $sender_address to <>
1691 for the sender address verify, Exim was re-instated it as the original
1692 (before rewriting) address, but remembering that it had rewritten it, so it
1693 wasn't rewriting it again. This bug also had the effect of breaking the
1694 sender address verification caching when the sender address was rewritten.
1696 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1697 This has been changed so that if the ip literal address matches
1698 ignore_target_hosts, the router declines.
1700 7. Added expansion conditions match_domain, match_address, and match_local_
1701 part (NOT match_host).
1703 8. The placeholder for the Received: header didn't have a length field set.
1705 9. Added code to Exim itself and to exim_lock to test for a specific race
1706 condition that could lead to file corruption when using MBX delivery. The
1707 issue is with the lockfile that is created in /tmp. If this file is removed
1708 after a process has opened it but before that process has acquired a lock,
1709 there is the potential for a second process to recreate the file and also
1710 acquire a lock. This could lead to two Exim processes writing to the file
1711 at the same time. The added code performs the same test as UW imapd; it
1712 checks after acquiring the lock that its file descriptor still refers to
1713 the same named file.
1715 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1716 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1719 11. Added the smtp_active_hostname option. If used, this will typically be made
1720 to depend on the incoming interface address. Because $interface_address is
1721 not set up until the daemon has forked a reception process, error responses
1722 that can happen earlier (such as "too many connections") no longer contain
1725 12. If an expansion in a condition on a "warn" statement fails because a lookup
1726 defers, the "warn" statement is abandoned, and the next ACL statement is
1727 processed. Previously this caused the whole ACL to be aborted.
1729 13. Added the iplsearch lookup type.
1731 14. Added ident_timeout as a log selector.
1733 15. Added tls_certificate_verified as a log selector.
1735 16. Added a global option tls_require_ciphers (compare the smtp transport
1736 option of the same name). This controls incoming TLS connections.
1738 17. I finally figured out how to make tls_require_ciphers do a similar thing
1739 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1740 before starting the TLS session.
1742 18. Tabs are now shown as \t in -bP output.
1744 19. If the log selector return_path_on_delivery was set, Exim crashed when
1745 bouncing a message because it had too many Received: header lines.
1747 20. If two routers both had headers_remove settings, and the first one included
1748 a superfluous trailing colon, the final name in the first list and the
1749 first name in the second list were incorrectly joined into one item (with a
1750 colon in the middle).
1756 1. Added -C and -D options to the exinext utility, mainly to make it easier
1757 to include in the automated testing, but these could be helpful when
1758 multiple configurations are in use.
1760 2. The exinext utility was not formatting the output nicely when there was
1761 an alternate port involved in the retry record key, nor when there was a
1762 message id as well (for retries that were specific to a specific message
1763 and a specific host). It was also confused by IPv6 addresses, because of
1764 the additional colons they contain. I have fixed the IPv4 problem, and
1765 patched it up to do a reasonable job for IPv6.
1767 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1768 delivery, the log line now contains "pipelined" if PIPELINING was used.
1770 4. An SMTP transport process used to panic and die if the bind() call to set
1771 an explicit outgoing interface failed. This has been changed; it is now
1772 treated in the same way as a connect() failure.
1774 5. A reference to $sender_host_name in the part of a conditional expansion
1775 that was being skipped was still causing a DNS lookup. This no longer
1778 6. The def: expansion condition was not recognizing references to header lines
1779 that used bh_ and bheader_.
1781 7. Added the _cache feature to named lists.
1783 8. The code for checking quota_filecount in the appendfile transport was
1784 allowing one more file than it should have been.
1786 9. For compatibility with Sendmail, the command line option
1794 and sets the incoming protocol and host name (for trusted callers). The
1795 host name and its colon can be omitted when only the protocol is to be set.
1796 Note the Exim already has two private options, -pd and -ps, that refer to
1797 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1798 "s", but I don't think that's a major issue.
1800 10. A number of refactoring changes to the code, none of which should affect
1803 (a) The number of logging options was getting close to filling up the
1804 32-bit word that was used as a bit map. I have split them into two classes:
1805 those that are passed in the argument to log_write(), and those that are
1806 only ever tested independently outside of that function. These are now in
1807 separate 32-bit words, so there is plenty of room for expansion again.
1808 There is no change in the user interface or the logging behaviour.
1810 (b) When building, for example, log lines, the code previously used a
1811 macro that called string_cat() twice, in order to add two strings. This is
1812 not really sufficiently general. Furthermore, there was one instance where
1813 it was actually wrong because one of the argument was used twice, and in
1814 one call a function was used. (As it happened, calling the function twice
1815 did not affect the overall behaviour.) The macro has been replaced by a
1816 function that can join an arbitrary number of extra strings onto a growing
1819 (c) The code for expansion conditions now uses a table and a binary chop
1820 instead of a serial search (which was left over from when there were very
1821 few conditions). Also, it now recognizes conditions like "pam" even when
1822 the relevant support is not compiled in: a suitably worded error message is
1823 given if an attempt is made to use such a condition.
1825 11. Added ${time_interval:xxxxx}.
1827 12. A bug was causing one of the ddress fields not to be passed back correctly
1828 from remote delivery subprocesses. The field in question was not being
1829 subsequently used, so this caused to problems in practice.
1831 13. Added new log selectors queue_time and deliver_time.
1833 14. Might have fixed a bug in maildirsizefile handling that threw up
1834 "unexpected character" debug warnings, and recalculated the data
1835 unnecessarily. In any case, I expanded the warning message to give more
1838 15. Added the message "Restricted characters in address" to the statements in
1839 the default ACL that block characters like @ and % in local parts.
1841 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
1842 Three changes have been made:
1844 (a) There was a serious bug; a negative response to MAIL caused the whole
1845 recipient domain to be cached as invalid, thereby blocking all messages
1846 to all local parts at the same domain, from all senders. This bug has
1847 been fixed. The domain is no longer cached after a negative response to
1848 MAIL if the sender used is not empty.
1850 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1853 (c) A new callout option, "use_sender" has been added for people who want
1854 the modified behaviour.
1860 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1863 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1864 indeed breaks things for older releases.
1866 3. Added additional logging to the case where there is a problem reading data
1867 from a filter that is running in a subprocess using a pipe, in order to
1868 try to track down a specific problem.
1870 4. Testing facility fudge: when running in the test harness and attempting
1871 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1872 getting "No route to host". Convert this to a timeout.
1874 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1877 6. Some OS don't have socklen_t but use size_t instead. This affects the
1878 fifth argument of getsockopt() amongst other things. This is now
1879 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1880 can be set for individual OS. I have set it for SunOS5, OSF1, and
1881 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1882 some earlier ones do not.
1884 7. Change 4.30/15 was not doing the test caselessly.
1886 8. The standard form for an IPv6 address literal was being rejected by address
1887 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1888 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1889 this, as well as the form without the "IPv6" on the front (but only when
1890 address literals are enabled, of course).
1892 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
1894 10. Exim crashed if a message with an empty sender address specified by -f
1895 encountered a router with an errors_to setting. This could be provoked only
1896 by a command such as
1900 where an empty string was supplied; "<>" did not hit this bug.
1902 11. Installed PCRE release 4.5.
1904 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1905 remained set. It is now erased.
1907 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1908 times from message ids (which are base 36 rather than the normal 62).
1910 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1911 were being counted as actual protocol errors, and logged if the log
1912 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1913 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1914 and DATA following a set of rejected RCPTs do not count as protocol errors.
1915 In other words, Exim assumes they were pipelined, though this may not
1916 actually be the case. Of course, in all cases the client gets an
1917 appropriate error code.
1919 15. If a lookup fails in an ACL condition, a message about the failure may
1920 be available; it is used if testing the ACL cannot continue, because most
1921 such messages specify what the cause of the deferral is. However, some
1922 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1923 that caused an old message to be retained and used if a later statement
1924 caused a defer, replacing the real cause of the deferral.
1926 16. If an IP address had so many PTR records that the DNS lookup buffer
1927 was not large enough to hold them, Exim could crash while trying to process
1928 the truncated data. It now detects and logs this case.
1930 17. Further to 4.21/58, another change has been made: if (and only if) the
1931 first line of a message (the first header line) ends with CRLF, a bare LF
1932 in a subsequent header line has a space inserted after it, so as not to
1933 terminate the header.
1935 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
1936 unnecessarily, used atoi() instead of strtol(), and didn't check the
1937 termination when getting file sizes from file names by regex.
1939 19. Completely re-implemented the support for maildirsize files, in the light
1940 of a number of problems with the previous contributed implementation
1941 (4.30/29). In particular:
1943 . If the quota is zero, the maildirsize file is maintained, but no quota is
1946 . If the maildir directory does not exist, it is created before any attempt
1947 to write a maildirsize file.
1949 . The quota value in the file is just a cache; if the quota is changed in
1950 the transport, the new value overrides.
1952 . A regular expression is available for excluding directories from the
1955 20. The autoreply transport checks the characters in options that define the
1956 message's headers; it allows continued headers, but it was checking with
1957 isspace() after an embedded newline instead of explicitly looking for a
1960 21. If all the "regular" hosts to which an address was routed had passed their
1961 expiry times, and had not reached their retry times, the address was
1962 bounced, even if fallback hosts were defined. Now Exim should go on to try
1965 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1966 equivalent code in the SMTP transport. Some hosts send humungous responses
1967 to HELO/EHLO, more than 1024 it seems.
1969 23. Refactoring: code in filter.c used (void *) for "any old type" but this
1970 gives compiler warnings in some environments. I've now done it "properly",
1973 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1974 (because of problems with the built-in one) was declared to return uschar *
1975 instead of char *, causing compiler failure.
1977 25. Fixed a file descriptor leak when processing alias/forward files.
1979 26. Fixed a minor format string issue in dbfn.c.
1981 27. Typo in exim.c: ("dmbnz" for "dbmnz").
1983 28. If a filter file refered to $h_xxx or $message_headers, and the headers
1984 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1987 29. When a sender address is verified, it is cached, to save repeating the test
1988 when there is more than one recipient in a message. However, when the
1989 verification involves a callout, it is possible for different callout
1990 options to be set for different recipients. It is too complicated to keep
1991 track of this in the cache, so now Exim always runs a verification when a
1992 callout is required, relying on the callout cache for the optimization.
1993 The overhead is duplication of the address routing, but this should not be
1996 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
1997 to be verified with callout=postmaster, and the main callout worked but the
1998 postmaster check failed, the verification correctly failed. However, if a
1999 subsequent RCPT command asked for sender verification *without* the
2000 postmaster check, incorrect caching caused this verification also to fail,
2003 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2004 it was not caching the DNS options (qualify_single, search_parents) that
2005 were used when the lookup failed. A subsequent lookup with different
2006 options therefore always gave the same answer, though there were cases
2007 where it should not have. (Example: a "domains = !$mx_any" option on a
2008 dnslookup router: the "domains" option is always processed without any
2009 widening, but the router might have qualify_single set.) Now Exim uses the
2010 cached value only when the same options are set.
2012 32. Added John Jetmore's "exipick" utility to the distribution.
2014 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2015 than a timeout (e.g. a certificate is required, and is not provided), an
2016 Exim server now closes the connection immediately. Previously it waited for
2017 the client to close - but if the client is SSL, it seems that they each
2018 wait for each other, leading to a delay before one of them times out.
2020 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2021 maintained 0.8.x compatibility because I don't think many are using it, and
2022 it is clearly obsolete.
2024 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2027 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2028 client certificate was expired. A simple patch fixes this, though I don't
2029 understand the full logic of why the verify callback is called multiple
2032 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2033 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2034 which causes problems with some clients (such as the Certicom SSL Plus
2035 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2036 disables the coutermeasure allowing Eudora to connect."
2038 38. Exim was not checking that a write() to a log file succeeded. This could
2039 lead to Bad Things if a log got too big, in particular if it hit a file
2040 size limit. Exim now panics and dies if it cannot write to a log file, just
2041 as it does if it cannot open a log file.
2043 39. Modified OS/Makefile-Linux so that it now contains
2045 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2047 The two -D definitions ensure that Exim is compiled with large file
2048 support, which makes it possible to handle log files that are bigger than
2051 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2052 instance) a domain was checked against a named list that involved a lookup,
2053 causing $domain_data to be set, then another domain was checked against the
2054 same list, then the first domain was re-checked, the value of $domain_data
2055 after the final check could be wrong. In particular, if the second check
2056 failed, it could be set empty. This bug probably also applied to
2059 41. The strip_trailing_dot option was not being applied to the address given
2060 with the -f command-line option.
2062 42. The code for reading a message's header from the spool was incrementing
2063 $received_count, but never initializing it. This meant that the value was
2064 incorrect (doubled) while delivering a message in the same process in which
2065 it was received. In the most common configuration of Exim, this never
2066 happens - a fresh exec is done - but it can happen when
2067 deliver_drop_privilege is set.
2069 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2070 it now includes up to 150 characters of the unexpected data in the log
2073 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2074 and building data strings. The size of both of these buffers was 10 000
2075 bytes - far larger than anybody would *ever* want, thought I. Needless to
2076 say, somebody hit the limit. I have increased the maximum line length to
2077 20 000 and the maximum data length of concatenated lines to 100 000. I have
2078 also fixed two bugs, because there was no checking on these buffers. Tsk,
2079 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2080 buffer is too small.
2082 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2083 lsearch lookups. Now it does.
2085 46. When parsing a route_list item in a manualroute router, a fixed-length
2086 buffer was used for the list of hosts. I made this 1024 bytes long,
2087 thinking that nobody would ever have a list of hosts that long. Wrong.
2088 Somebody had a whole pile of complicated expansion conditions, and the
2089 string was silently truncated, leading to an expansion error. It turns out
2090 that it is easier to change to an unlimited length (owing to other changes
2091 that have happened since this code was originally written) than to build
2092 structure for giving a limitation error. The length of the item that
2093 expands into the list of hosts is now unlimited.
2095 47. The lsearch lookup could not handle data where the length of text line was
2096 more than 4095 characters. Such lines were truncated, leading to shortened
2097 data being returned. It should now handle lines of any length.
2099 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2100 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2103 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2104 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2105 no longer happens in comment lines. A list of replacements is now placed
2106 at the head of all of the source files, except those whose only change is
2107 to replace PERL_COMMAND in the very first #! line.
2109 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2110 messages on the queue, with a bottom-up merge sort, using code contributed
2111 by Michael Haardt. This should make operations like -bp somewhat faster on
2112 large queues. It won't affect queue runners, except when queue_run_in_order
2115 51. Installed eximstats 1.31 in the distribution.
2117 52. Added support for SRV lookups to the dnslookup router.
2119 53. If an ACL referred to $message_body or $message_body_end, the value was not
2120 reset for any messages that followed in the same SMTP session.
2122 54. The store-handling optimization for building very long strings was not
2123 differentiating between the different store pools. I don't think this
2124 actually made any difference in practice, but I've tidied it.
2126 55. While running the routers to verify a sender address, $sender_address
2127 was still set to the sender address. This is wrong, because when routing to
2128 send a bounce to the sender, it would be empty. Therefore, I have changed
2129 it so that, while verifying a sender address, $sender_address is set to <>.
2130 (There is no change to what happens when verifying a recipient address.)
2132 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2133 target A or AAAA records (if not already returned) without resetting the
2134 qualify_single or search_parents options of the DNS resolver. These are
2135 inappropriate in this case because the targets of MX and SRV records must
2136 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2137 target that, when qualified, matched something in the local domain. These
2138 two options are now turned off when doing these lookups.
2140 57. It seems that at least some releases of Reiserfs (which does not have the
2141 concept of a fixed number of inodes) returns zero and not -1 for the
2142 number of available inodes. This interacted badly with check_spool_inodes,
2143 which assumed that -1 was the "no such thing" setting. What I have done is
2144 to check that the total number of inodes is greater than zero before doing
2145 the test of how many are available.
2147 58. When a "warn" ACL statement has a log_message modifier, the message is
2148 remembered, and not repeated. This is to avoid a lot of repetition when a
2149 message has many recipients that cause the same warning to be written.
2150 Howewer, Exim was preserving the list of already written lines for an
2151 entire SMTP session, which doesn't seem right. The memory is now reset if a
2152 new message is started.
2154 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2155 debugging output unless log_rewrite was also set.
2157 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2158 of (int)(handle) when we know that handle contains (void *)(-1).
2160 61. The Exim daemon panic-logs an error return when it closes the incoming
2161 connection. However "connection reset by peer" seems to be common, and
2162 isn't really an error worthy of noting specially, so that particular error
2165 62. When Exim is trying to find all the local interfaces, it used to panic and
2166 die if the ioctl to get the interface flags failed. However, it seems that
2167 on at least one OS (Solaris 9) it is possible to have an interface that is
2168 included in the list of interfaces, but for which you get a failure error
2169 for this call. This happens when the interface is not "plumbed" into a
2170 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2171 failure of the "get flags" call assumes that the interface is down.
2173 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2174 makes life easier for people who are doing arithmetic on fields extracted
2175 from dates, where you often get leading zeros that should not be
2176 interpreted as octal.
2178 64. Added qualify_domain to the redirect router, to override the global
2181 65. If a pathologically long header line contained very many addresses (the
2182 report of this problem mentioned 10 000) and each of them was rewritten,
2183 Exim could use up a very large amount of memory. (It kept on making new
2184 copies of the header line as it rewrote, and never released the old ones.)
2185 At the expense of a bit more processing, the header rewriting function has
2186 been changed so that it no longer eats memory in this way.
2188 66. The generation of the Received: header has been moved from the time that a
2189 message starts to be received, to the time that it finishes. The timestamp
2190 in the Received: header should now be very close to that of the <= log
2191 line. There are two side-effects of this change:
2193 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2194 logged header lines no longer include the local Received: line, because
2195 it has not yet been created. The same applies to a copy of the message
2196 that is returned to a non-SMTP sender when a message is rejected.
2198 (b) When a filter file is tested using -bf, no additional Received: header
2199 is added to the test message. After some thought, I decided that this
2202 This change does not affect the value of $received_for. It is still set
2203 after address rewriting, but before local_scan() is called.
2205 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2207 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2208 gave an unhelpful panic error message, and a defer error. I have managed to
2209 change this behaviour so that it now rejects any supplied certificate,
2210 which seems right, as the list of acceptable certificates is empty.
2212 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2213 gave an unhelpful defer error. I have not managed to make this reject any
2214 supplied certificates, but the error message it gives is "no certificate
2215 supplied", which is not helpful.
2217 70. exigrep's output now also includes lines that are not associated with any
2218 message, but which match the given pattern. Implemented by a patch from
2219 Martin Sluka, which also tidied up the Perl a bit.
2221 71. Recipient callout verification, like sender verification, was using <> in
2222 the MAIL FROM command. This isn't really the right thing, since the actual
2223 sender may affect whether the remote host accepts the recipient or not. I
2224 have changed it to use the actual sender in the callout; this means that
2225 the cache record is now keyed on a recipient/sender pair, not just the
2226 recipient address. There doesn't seem to be a real danger of callout loops,
2227 since a callout by the remote host to check the sender would use <>.
2228 [SEE ABOVE: changed after hitting problems.]
2230 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2231 temporary errors. However, in the case of such a code being given after
2232 the end of a data transmission (i.e. after ".") Exim was failing to write
2233 a retry record for the message. (Yes, there was some broken host that was
2234 actually sending 8xx at this point.)
2236 73. An unknown lookup type in a host list could cause Exim to panic-die when
2237 the list was checked. (An example that provoked this was putting <; in the
2238 middle of a list instead of at the start.) If this happened during a DATA
2239 ACL check, a -D file could be left lying around. This kind of configuration
2240 error no longer causes Exim to die; instead it causes a defer errror. The
2241 incident is still logged to the main and panic logs.
2243 74. Buglet left over from Exim 3 conversion. The message "too many messages
2244 in one connection" was written to the rejectlog but not the mainlog, except
2245 when address rewriting (yes!) was being logged.
2247 75. Added write_rejectlog option.
2249 76. When a system filter was run not as root (that is, when system_filter_user
2250 was set), the values of the $n variables were not being returned to the
2251 main process; thus, they were not subsequently available in the $sn
2254 77. Added +return_path_on_delivery log selector.
2256 78. A connection timeout was being treated differently from recipients deferred
2257 when testing hosts_max_try with a message that was older than the host's
2258 retry timeout. (The host should not be counted, thus allowing all hosts to
2259 be tried at least once before bouncing.) This may have been the cause of an
2260 occasionally reported bug whereby a message would remain on the queue
2261 longer than the retry timeout, but would be bounced if a delivery was
2262 forced. I say "may" because I never totally pinned down the problem;
2263 setting up timeout/retry tests is difficult. See also the next item.
2265 79. The ultimate address timeout was not being applied to errors that involved
2266 a combination of host plus message (for example, a timeout on a MAIL
2267 command). When an address resolved to a number of possible hosts, and they
2268 were not all tried for each delivery (e.g. because of hosts_max_try), a
2269 message could remain on the queue longer than the retry timeout.
2271 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2274 81. Fixed an obscure SMTP outgoing bug which required at least the following
2275 conditions: (a) there was another message waiting for the same server;
2276 (b) the server returned 5xx to all RCPT commands in the first message so
2277 that the message was not completed; (c) the server dropped the connection
2278 or gave a negative response to the RSET that Exim sends to abort the
2279 transaction. The observed case was a dropped connection after DATA that had
2280 been sent in pipelining mode. That is, the server had advertised PIPELINING
2281 but was not implementing it correctly. The effect of the bug was incorrect
2282 behaviour, such as trying another host, and this could lead to a crash.
2288 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2289 and daemon.c were passed as pointers to ints; they should have been
2290 pointers to socklen_t variables (which are typically unsigned ints).
2292 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2295 3. Fixed a really odd bug that affected only the testing scheme; patching a
2296 certain fixed string in the binary changed the value of another string that
2297 happened to be identical to the end of the original first string.
2299 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2300 name", it returns that address as the IP address. On some operating
2301 systems (e.g. Solaris), it also passes back the IP address string as the
2302 "host name". However, on others (e.g. Linux), it passes back an empty
2303 string. Exim wasn't checking for this, and was changing the host name to an
2304 empty string, assuming it had been canonicized.
2306 5. Although rare, it is permitted to have more than one PTR record for a given
2307 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2308 all the names associated with an address, because they do in Solaris.
2309 However, it seems that they do not in Linux for data that comes from the
2310 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2311 I found this out when I moved to a new Linux workstation and tried to run
2312 the Exim test suite.
2314 To get round this problem I have changed the code so that it now does its
2315 own call to the DNS to look up PTR records when searching for a host name.
2316 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2317 addresses that are only in /etc/hosts are still found.
2319 This behaviour is, however, controlled by an option called host_lookup_
2320 order, which defaults to "bydns:byaddr". If people want to use the other
2321 order, or indeed, just use one or the other means of lookup, they can
2322 specify it in this variable.
2324 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2325 some operating systems, this comes back from gethostbyaddr() as an empty
2326 string, and this is what Exim used to test for. However, it seems that in
2327 other systems, "." is yielded. Exim now tests for this case too.
2329 7. The values of check_spool_space and check_log_space are now held internally
2330 as a number of kilobytes instead of an absolute number of bytes. If a
2331 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2332 kilobyte. This means that much larger values can be stored.
2334 8. Exim monitor: an attempt to get the action menu when not actually pointing
2335 at a message produces an empty menu entitled "No message selected". This
2336 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2337 no entries in it ("Shell widget menu has zero width and/or height"). So I
2338 have added a single, blank menu entry in this case.
2340 9. Added ${quote_local_part.
2342 10. MIME decoding is now applied to the contents of Subject: header lines when
2345 11. Now that a reference to $sender_host_address automatically causes a reverse
2346 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2347 host lookup before query-style lookups in lists that might use this
2348 variable. This has therefore been abolished, and the "net-" prefix is no
2349 longer necessary for query-style lookups.
2351 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2352 have been a typo for LFLAGS, so it has been changed.
2354 13. The install script calls Exim with "-C /dev/null" in order to find the
2355 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2356 to be output. Howeve, since Exim outputs its version number before the
2357 error, it didn't break the script. It just looked ugly. I fixed this by
2358 always allowing "-C /dev/null" if the caller is root.
2360 14. Ignore overlarge ACL variable number when reading spool file - insurance
2361 against a later release with more variables having written the file.
2363 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2364 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2365 this, as well as the form without the "IPv6" on the front.
2367 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2368 OS/Makefile-Darwin file.
2370 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2371 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2373 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2374 variable. However, some OS use ints for inodes. I've added cast to long int
2375 to get rid of the compiler warning.
2377 19. I had forgotten to lock out "/../" in configuration file names when
2378 ALT_CONFIG_PREFIX was set.
2380 20. Routers used for verification do not need to specify transports. However,
2381 if such a router generated a host list, and callout was configured, Exim
2382 crashed, because it could not find a port number from the (non-existent)
2383 transport. It now assumes port 25 in this circumstance.
2385 21. Added the -t option to exigrep.
2387 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2388 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2389 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2390 them is set, LOOKUP_LSEARCH is forced.
2392 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2394 24. Added sender and host information to the "rejected by local_scan()" log
2395 line; previously there was no indication of these.
2397 25. Added .include_if_exists.
2399 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2400 Linux. It turns out that not all file systems support this. Apparently some
2401 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2402 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2403 not supported on the file descriptor, is now ignored when Exim is trying to
2404 sync a directory. This applies only to Linux.
2406 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2408 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2409 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2412 29. Added support for maildirsize files from supplied patch (modified a bit).
2414 30. The use of :fail: followed by an empty string could lead Exim to respond to
2415 sender verification failures with (e.g.):
2417 550 Verification failed for <xxx>
2418 550 Sender verify failed
2420 where the first response line was missing the '-' that indicates it is not
2421 the final line of the response.
2423 31. The loop for finding the name of the user that called Exim had a hardwired
2424 limit of 10; it now uses the value of finduser_retries, which is used for
2425 all other user lookups.
2427 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2430 33. Exim was neglecting to zero errno before one call of strtol() when
2431 expanding a string and expecting an integer value. On some systems this
2432 resulted in spurious "integer overflow" errors. Also, it was casting the
2433 result into an int without checking.
2435 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2436 did not work. The code looks as if it has *never* worked, though it appears
2437 to have been documented since at least releast 1.62. I have made it work.
2439 35. The "timeout_DNS" error in retry rules, also documented since at least
2440 1.62, also never worked. As it isn't clear exactly what this means, and
2441 clearly it isn't a major issue, I have abolished the feature by treating it
2442 as "timeout", and writing a warning to the main and panic logs.
2444 36. The display of retry rules for -brt wasn't always showing the error code
2447 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2448 timeout_connect_A, timeout_connect_MX.
2450 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2451 to the empty sender.
2453 39. The daemon was not analysing the content of -oX till after it had closed
2454 stderr and disconnected from the controlling terminal. This meant that any
2455 syntax errors were only noted on the panic log, and the return code from
2456 the command was 0. By re-arranging the code a little, I've made the
2457 decoding happen first, so such errors now appear on stderr, and the return
2458 code is 1. However, the actual setting up of the sockets still happens in
2459 the disconnected process, so errors there are still only recorded on the
2462 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2463 connections (as happens on some IP stacks) was logged at start up time as
2464 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2465 it from "IPv6 and IPv4", which means that two separate sockets are being
2468 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2469 says whether AF_INET or AF_INET6 was passed as an argument.
2471 42. Exiwhat output was messed up when time zones were included in log
2474 43. Exiwhat now gives more information about the daemon's listening ports,
2475 and whether -tls-on-connect was used.
2477 44. The "port" option of the smtp transport is now expanded.
2479 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2480 silently ignored. Now an error message is written to the main and panic
2483 46. There's a new ACL modifier called "logwrite" which writes to a log file
2484 as soon as it is encountered.
2486 47. Added $local_user_uid and $local_user_gid at routing time.
2488 48. Exim crashed when trying to verify a sender address that was being
2491 49. Exim was recognizing only a space character after ".include". It now also
2492 recognizes a tab character.
2494 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2495 extracting the relevant information from the specification. The man page no
2496 longer contains scrambled data for the -d option, and I've added a section
2497 at the front about calling Exim under different names.
2499 51. Added "extra_headers" argument to the "mail" command in filter files.
2501 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2504 53. Installed eximstats 1.29.
2506 54. Added transport_filter_timeout as a generic transport option.
2508 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2509 Cc: header lines. This was required by RFC 822, but it not required by RFC
2512 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2513 incoming messages that did not have them. Now it does so only if the
2514 message originates locally, that is, if there is no associated remote host
2515 address. When Resent- header lines are present, this applies to the Resent-
2516 lines rather than the non-Resent- lines.
2518 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2519 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2521 58. Messages for configuration errors now include the name of the main
2522 configuration file - useful now that there may be more than one file in a
2523 list (.included file names were always shown).
2525 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2526 for those rare installations that do not start the daemon as root or run it
2527 setuid root. I've cut out the call to initgroups() if the daemon is not
2530 60. The Exim user and group can now be bound into the binary as text strings
2531 that are looked up at the start of Exim's processing.
2533 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2535 62. Added $mailstore_basename variable.
2537 63. Installed patch to sieve.c from Michael Haardt.
2539 64. When Exim failed to open the panic log after failing to open the main log,
2540 the original message it was trying to log was written to stderr and debug
2541 output, but if they were not available (the usual case in production), it
2542 was lost. Now it is written to syslog before the two lines that record the
2543 failures to open the logs.
2545 65. Users' Exim filters run in subprocesses under the user's uid. It is
2546 possible for a "deliver" command or an alias in a "personal" command to
2547 provoke an address rewrite. If logging of address rewriting is configured,
2548 this fails because the process is not running as root or exim. There may be
2549 a better way of dealing with this, but for the moment (because 4.30 needs
2550 to be released), I have disabled address rewrite logging when running a
2551 filter in a non-root, non-exim process.
2557 1. The buildconfig auxiliary program wasn't quoting the value set for
2558 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2559 not defined. This bug was masked in 4.22 by the effect that was fixed in
2562 2. Some messages that were rejected after a message id was allocated were
2563 shown as "incomplete" by exigrep. It no longer does this for messages that
2564 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2566 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2567 have allow_domain_literals set, the ID did not get logged in the <= line.
2568 Domain literals are now always recognized in Message-ID: header lines.
2570 4. The first argument for a ${extract expansion item is the key name or field
2571 number. Leading and trailing spaces in this item were not being ignored,
2572 causing some misleading effects.
2574 5. When deliver_drop_privilege was set, single queue runner processes started
2575 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2576 same command in the process it spins off) were not dropping privilege.
2578 6. When the daemon running as "exim" started a queue runner, it always
2579 re-executed Exim in the spun-off process. This is a waste of effort when
2580 deliver_drop_privilege is set. The new process now just calls the
2581 queue-runner function directly.
2587 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2590 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2591 ignored. Though the use of -oP was forcing the writing of a pid file, it
2592 was always written to the default place.
2594 3. If the message "no IP address found for host xxxx" is generated during
2595 incoming verification, it is now followed by identification of the incoming
2596 connection (so you can more easily find what provoked it).
2598 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2600 5. Added some features to "harden" Exim a bit more against certain attacks:
2602 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2603 be put in Local/Makefile. This is like the never_users runtime option,
2604 but it cannot be overridden. The default setting is "root".
2606 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2607 prefix string with which any file named in a -C command line option
2610 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2611 is retained for -C and -D only if the caller of Exim is root. Without
2612 it, the exim user may also use -C and -D and retain privilege.
2614 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2615 command line option is disabled.
2617 6. Macro names set by the -D option must start with an upper case letter, just
2618 like macro names defined in the configuration file.
2620 7. Added "dereference=" facility to LDAP.
2622 8. Two instances of the typo "uknown" in the source files are fixed.
2624 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2625 the Configure-Makefile script screwed up while processing it.
2627 10. Incorporated PCRE 4.4.
2629 11. The SMTP synchronization check was not operating right at the start of an
2630 SMTP session. For example, it could not catch a HELO sent before the client
2631 waited for the greeting. There is now a check for outstanding input at the
2632 point when the greeting is written. Because of the duplex, asynchronous
2633 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2634 way, but not yet received, when the check is performed.
2636 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2637 on TCP/IP sockets, because this apparently causes some broken clients to
2640 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2641 unchanged) from the Cygwin maintainer.
2643 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2644 was supported instead of testing for mbx. Effectively a typo.
2646 15. The spa authenticator server code was not checking that the input it
2647 received was valid base64.
2649 16. The debug output line for the "set" modifier in ACLs was not showing the
2650 name of the variable that was being set.
2652 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2654 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2655 lookup on its own. Something else was needed to trigger the lookup. For
2656 example, a match in host_lookup or the need for a host name in a host list.
2657 Now, if $sender_host_name is referenced and the host name has not yet been
2658 looked up, a lookup is performed. If the lookup fails, the variable remains
2659 empty, and $host_lookup_failed is set to "1".
2661 19. Added "eqi" as a case-independent comparison operator.
2663 20. The saslauthd authentication condition could segfault if neither service
2664 nor realm was specified.
2666 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2667 error message that was logged was misleading, and incoming SMTP
2668 connections were dropped. The message is now more accurate, and temporary
2669 errors are given to SMTP connections.
2671 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2672 (except RSET) with a 421 error, until QUIT is received. However, it was
2673 failing to send a response to QUIT.
2675 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2676 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2677 ACL is now run after the helo_try_verify_hosts code.
2679 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2680 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2681 case-independent, so other case variants are also recognized). Apparently
2682 some systems use these upper case variants.
2684 25. If more than two messages were waiting for the same host, and a transport
2685 filter was specified for the transport, Exim sent two messages over the
2686 same TCP/IP connection, and then failed with "socket operation on non-
2687 socket" when it tried to send the third.
2689 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2691 27. The extern definition of crypt16() in expand.c was not being excluded when
2692 the OS had its own crypt16() function.
2694 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2695 as a preferred synonym for return_size_limit, both as an option and as an
2698 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2700 30. Changed the default configuration ACL to relax the local part checking rule
2701 for addresses that are not in any local domains. For these addresses,
2702 slashes and pipe symbols are allowed within local parts, but the sequence
2703 /../ is explicitly forbidden.
2705 31. SPA server authentication was not clearing the challenge buffer before
2708 32. log_message in a "warn" ACL statement was writing to the reject log as
2709 well as to the main log, which contradicts the documentation and doesn't
2710 seem right (because no rejection is happening). So I have stopped it.
2712 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2713 However, I am unable to do any testing of this.
2715 34. Fixed an infelicity in the appendfile transport. When checking directories
2716 for a mailbox, to see if any needed to be created, it was accidentally
2717 using path names with one or more superfluous leading slashes; tracing
2718 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2720 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2721 contents are added to the log line that is written for every discarded
2722 recipient. (Previously a log_message setting was ignored.)
2724 36. The ${quote: operator now quotes the string if it is empty.
2726 37. The install script runs exim in order to find its version number. If for
2727 some reason other than non-existence or emptiness, which it checks, it
2728 could not run './exim', it was installing it with an empty version number,
2729 i.e. as "exim-". This error state is now caught, and the installation is
2732 38. An argument was missing from the function that creates an error message
2733 when Exim fails to connect to the socket for saslauthd authentication.
2734 This could cause Exim to crash, or give a corrupted message.
2736 39. Added isip, isip4, and isip6 to ${if conditions.
2738 40. The ACL variables $acl_xx are now saved with the message, and can be
2739 accessed later in routers, transports, and filters.
2741 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2742 strings in the file are not string-expanded.
2744 42. If a MAIL command specified a SIZE value that was too large to fit into an
2745 int variable, the check against message_size_limit failed. Such values are
2746 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2747 day this will have to be increased, but I don't think I want to be around
2748 when emails are that large.
2755 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2756 iconv() is not standard in FreeBSD.
2758 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2759 IPv6 enabled. The observed symptom was a segmentation fault on return from
2760 the function os_common_find_running_interfaces() in src/os.c.
2762 3. In the check_special_case() function in daemon.c I had used "errno" as an
2763 argument name, which causes warnings on some systems. This was basically a
2764 typo, since it was named "eno" in the comments!
2766 4. The code that waits for the clock to tick (at a resolution of some fraction
2767 of a second) so as to ensure message-id uniqueness was always waiting for
2768 at least one whole tick, when it could have waited for less. [This is
2769 almost certainly not relevant at current processor speeds, where it is
2770 unlikely to ever wait at all. But we try to future-proof.]
2772 5. The function that sleeps for a time interval that includes fractions of a
2773 second contained a race. It did not block SIGALRM between setting the
2774 timer, and suspending (a couple of lines later). If the interval was short
2775 and the sigsuspend() was delayed until after it had expired, the suspension
2776 never ended. On busy systems this could lead to processes getting stuck for
2779 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2780 process, before it forks any delivery processes. The open lookup caching
2781 mechanism meant that the open file or database connection was passed into
2782 the delivery process. The problem was that delivery processes always tidy
2783 up cached lookup data. This could cause a problem for the next delivery
2784 process started by the queue runner, because the external queue runner
2785 process does not know about the closure. So the next delivery process
2786 still has data in the lookup cache. In the case of a file lookup, there was
2787 no problem because closing a file descriptor in a subprocess doesn't affect
2788 the parent. However, if the lookup was caching a connection to a database,
2789 the connection was closed, and the second delivery process was likely to
2790 see errors such as "PGSQL: query failed: server closed the connection
2791 unexpectedly". The problem has been fixed by closing all cached lookups
2792 in a queue runner before running a delivery process.
2794 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2795 seem to have the "const" qualifier which it has on other OS. I've
2798 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2799 *of the same type* (client or server) with the same public name that an
2800 error should be diagnosed.
2802 9. When Exim looked up a host name for an IP address, but failed to find the
2803 original IP address when looking up the host name (a safety check), it
2804 output the message "<ip address> does not match any IP for NULL", which was
2805 confusing, to say the least. The bug was that the host name should have
2806 appeared instead of "NULL".
2808 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
2809 user that is built into the binary, and the -C or -D options is used, root
2810 privilege is dropped before the configuration file is read. In addition,
2811 logging is switched to stderr instead of the normal log files. If the
2812 configuration then re-defines the Exim user, the unprivileged environment
2813 is probably not what is expected, so Exim logs a panic warning message (but
2816 However, if deliver_drop_privilege is set, the unprivileged state may well
2817 be exactly what is intended, so the warning has been cut out in that case,
2818 and Exim is allowed to try to write to its normal log files.
2824 1. smtp_return_error_details was not giving details for temporary sender
2825 or receiver verification errors.
2827 2. Diagnose a configuration error if two authenticators have the same public
2830 3. Exim used not to create the message log file for a message until the first
2831 delivery attempt. This could be confusing when incoming messages were held
2832 for policy or load reasons. The message log file is now created at the time
2833 the message is received, and an initial "Received" line is written to it.
2835 4. The automatically generated man page for command line options had a minor
2836 bug that caused no ill effects; however, a more serious problem was that
2837 the procedure for building the man page automatically didn't always
2838 operate. Consequently, release 4.20 contains an out-of-date version. This
2839 shouldn't happen again.
2841 5. When building Exim with embedded Perl support, the script that builds the
2842 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2843 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2845 6. The freeze_tell option was not being used for messages that were frozen on
2846 arrival, either by an ACL or by local_scan().
2848 7. Added the smtp_incomplete_transaction log selector.
2850 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2851 was accepting AUTH without a new EHLO.
2853 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2854 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2857 10. Logging of TCP/IP connections (when configured) now happens in the main
2858 daemon process instead of the child process, so that the TCP/IP connection
2859 count is more accurate (but it can never be perfect).
2861 11. The use of "drop" in a nested ACL was not being handled correctly in the
2862 outer ACL. Now, if condition failure induced by the nested "drop" causes
2863 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2864 or "require"), the connection is dropped.
2866 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2867 that yield "discard" can now be used with an "accept" or a "discard" verb,
2868 but an error is generated for any others (because I can't see a useful way
2869 to define what should happen).
2871 13. When an ACL is read dynamically from a file (or anywhere else), the lines
2872 are now processed in the same way as lines in the Exim configuration file.
2873 In particular, continuation lines are supported.
2875 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2877 15. Added -ti meaning -t -i.
2879 16. Check for letters, digits, hyphens, and dots in the names of dnslist
2880 domains, and warn by logging if others are found.
2882 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
2883 returned from GIFCONF when Exim is trying to find the list of interfaces on
2884 a host. The code in os.c has been modified to copy each ifreq to an aligned
2885 structure in all cases.
2887 Also, in some cases, the returned ifreq's were being copied to a 'struct
2888 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2889 means the last couple of bytes of an IPv6 address could be chopped if the
2890 ifreq contained only a normal sockaddr (14 bytes storage).
2892 18. Named domain lists were not supported in the hosts_treat_as_local option.
2893 An entry such as +xxxx was not recognized, and was treated as a literal
2896 19. Ensure that header lines added by a DATA ACL are included in the reject log
2897 if the ACL subsequently rejects the message.
2899 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
2900 MD5 (which is deprecated).
2902 21. When testing a filter file using -bf, Exim was writing a message when it
2903 took the sender from a "From " line in the message, but it was not doing so
2904 when it took $return_path from a Return-Path: header line. It now does.
2906 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2907 with a valid header line field name (a series of printing characters
2908 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
2910 23. Changed "disc" in the source to "disk" to conform to the documentation and
2911 the book and for uniformity.
2913 24. Ignore Sendmail's -Ooption=value command line item.
2915 25. When execve() failed while trying to run a command in a pipe transport,
2916 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2917 could be confused with a return value of 69 from the command itself. This
2918 has been changed to 127, the value the shell returns if it is asked to run
2919 a non-existent command. The wording for the related log line suggests a
2920 non-existent command as the problem.
2922 26. If received_header_text expands to an empty string, do not add a Received:
2923 header line to the message. (Well, it adds a token one on the spool, but
2924 marks it "old" so that it doesn't get used or transmitted.)
2926 27. Installed eximstats 1.28 (addition of -nt option).
2928 28. There was no check for failure on the call to getsockname() in the daemon
2929 code. This can fail if there is a shortage of resources on the system, with
2930 ENOMEM, for example. A temporary error is now given on failure.
2932 29. Contrary to the C standard, it seems that in some environments, the
2933 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2934 program. Exim now does this explicitly; it affects the formatting of
2935 timestamps using strftime().
2937 30. If exiqsumm was given junk data, it threw up some uninitialized variable
2938 complaints. I've now initialized all the variables, to avoid this.
2940 32. Header lines added by a system filter were not being "seen" during
2941 transport-time rewrites.
2943 33. The info_callback() function passed to OpenSSL is set up with type void
2944 (*)(SSL *, int, int), as described somewhere. However, when calling the
2945 function (actually a macro) that sets it up, the type void(*)() is
2946 expected. I've put in a cast to prevent warnings from picky compilers.
2948 34. If a DNS black list lookup found a CNAME record, but there were no A
2949 records associated with the domain it pointed at, Exim crashed.
2951 35. If a DNS black list lookup returned more than one A record, Exim ignored
2952 all but the first. It now scans all returned addresses if a particular IP
2953 value is being sought. In this situation, the contents of the
2954 $dnslist_value variable are a list of all the addresses, separated by a
2957 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
2958 to accept a host name and all its aliases if the forward lookup for any of
2959 them yielded the IP address of the incoming connection. Now it accepts only
2960 those names whose forward lookup yields the correct IP address. Any other
2961 names are discarded. This closes a loophole whereby a rogue DNS
2962 administrator could create reverse DNS records to break through a
2963 wildcarded host restriction in an ACL.
2965 37. If a user filter or a system filter that ran in a subprocess used any of
2966 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2967 the wrong values were passed to the pipe command ($thisaddress had the
2968 value of $0, $0 had the value of $1, etc). This bug was introduced by
2969 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
2971 38. Improved the line breaking for long SMTP error messages from ACLs.
2972 Previously, if there was no break point between 40 and 75 characters, Exim
2973 left the rest of the message alone. Two changes have been made: (a) I've
2974 reduced the minimum length to 35 characters; (b) if it can't find a break
2975 point between 35 and 75 characters, it looks ahead and uses the first one
2976 that it finds. This may give the occasional overlong line, but at least the
2977 remaining text gets split now.
2979 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2980 file descriptors might be low, and that setting 1000 would always raise it.
2981 It turns out that in some environments, the limit is already over 1000 and
2982 that lowering it causes trouble. So now Exim takes care not to decrease it.
2984 40. When delivering a message, the value of $return_path is set to $sender_
2985 address at the start of routing (routers may change the value). By an
2986 oversight, this default was not being set up when an address was tested by
2987 -bt or -bv, which affected the outcome if any router or filter referred to
2990 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
2991 log only when "message" or "log_message" are set. However, if one of the
2992 conditions was an address verification, or a call to a nested ACL, the
2993 messages generated by the underlying test were being passed through. This
2994 no longer happens. The underlying message is available in $acl_verify_
2995 message for both "message" and "log_message" expansions, so it can be
2996 passed through if needed.
2998 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
2999 new expansion $bh_ to give the encoded byte string without charset
3000 translation. Translation happens only if iconv() is available; HAVE_ICONV
3001 indicates this at build time. HEADERS_CHARSET gives the charset to
3002 translate to; headers_charset can change it in the configuration, and
3003 "headers charset" can change it in an individual filter file.
3005 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3006 that creates RFC 2047 encoded "words" labels them as that charset instead
3007 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3008 expansion operator; (ii) when Exim creates a From: line for a local
3009 message; (iii) when a header line is rewritten to include a "phrase" part.
3011 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3012 buggy, causing it to skip the first lines of messages whose message ID
3013 ended in 'D'. This would not have bitten before Exim release 4.14, because
3014 message IDs were unlikely to end in 'D' before then. The effect was to have
3015 incorrect size information for certain domains.
3017 45. #include "config.h" was missing at the start of the crypt16.c module. This
3018 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3021 46. If there was a timeout during a "random" callout check, Exim treated it as
3022 a failure of the random address, and carried on sending RSET and the real
3023 address. If the delay was just some slowness somewhere, the response to the
3024 original RCPT would be taken as a response to RSET and so on, causing
3025 mayhem of various kinds.
3027 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3028 when I implemented it. It didn't allow for the fact that some option values
3029 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3030 the right test for positive values.
3032 48. Domain names in DNS records are case-independent. Exim always looks them up
3033 in lower case. Some resolvers return domain names in exactly the case they
3034 appear in the zone file, that is, they may contain uppercase letters. Not
3035 all resolvers do this - some return always lower case. Exim was treating a
3036 change of case by a resolver as a change of domain, similar to a widening
3037 of a domain abbreviation. This triggered its re-routing code and so it was
3038 trying to route what was effectively the same domain again. This normally
3039 caused routing to fail (because the router wouldn't handle the domain
3040 twice). Now Exim checks for this case specially, and just changes the
3041 casing of the domain that it ultimately uses when it transmits the message
3044 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3047 50. If a filter generated a file delivery with a non-absolute name (possible if
3048 no home directory exists for the router), the forbid_file option was not
3051 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3052 the existing equality matching.
3054 52. Exim was using ints instead of ino_t variables in some places where it was
3055 dealing with inode numbers.
3057 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3058 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3059 called TMPDIR, and if it finds it is different, it changes its value.
3061 54. The smtp_printf() function is now made available to local_scan() so
3062 additional output lines can be written before returning. There is also an
3063 smtp_fflush() function to enable the detection of a dropped connection.
3064 The variables smtp_input and smtp_batched_input are exported to
3067 55. Changed the default runtime configuration: the message "Unknown user"
3068 has been removed from the ACL, and instead placed on the localuser router,
3069 using the cannot_route_message feature. This means that any verification
3070 failures that generate their own messages won't get overridden. Similarly,
3071 the "Unrouteable address" message that was in the ACL for unverifiable
3072 relay addresses has also been removed.
3074 56. Added hosts_avoid_esmtp to the smtp transport.
3076 57. The exicyclog script was not checking for the esoteric option
3077 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3078 will work only if exicyclog is run under the appropriate euid.
3080 58. Following a discussion on the list, the rules by which Exim recognises line
3081 endings on incoming messages have been changed. The -dropcr and drop_cr
3082 options are now no-ops, retained only for backwards compatibility. The
3083 following line terminators are recognized: LF CRLF CR. However, special
3084 processing applies to CR:
3086 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3087 nor a local message in the state where . is a terminator.
3089 (ii) If a bare CR is encountered in a header line, an extra space is added
3090 after the line terminator so as not to end the header. The reasoning
3091 behind this is that bare CRs in header lines are most likely either
3092 to be mistakes, or people trying to play silly games.
3094 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3095 was being incorrectly given as 18 bytes larger than it should have been.
3096 This is a VOB (very old bug).
3098 60. This may never have affected anything current, but just in case it has:
3099 When the local host is found other than at the start of a list of hosts,
3100 the local host, those with the same MX, and any that follow, are discarded.
3101 When the list in question was part of a longer list of hosts, the following
3102 hosts (not currently being processed) were also being discarded. This no
3103 longer happens. I'm not sure if this situation could ever has previously
3106 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3109 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3110 header. This is something that is recommended in a new Internet Draft, and
3111 is something that is documented as being done by Sendmail. There are two
3112 possible values. For messages generated by the autoreply transport, Exim
3115 Auto-Submitted: auto-replied
3117 whereas for all other generated messages (e.g. bounces) it adds
3119 Auto-Submitted: auto-generated
3121 63. The "personal" condition in filters now includes a test for the
3122 Auto-Submitted: header. If it contains the string "auto-" the message it
3123 not considered personal.
3125 64. Added rcpt_include_affixes as a generic transport option.
3127 65. Added queue_only_override (default true).
3129 66. Added the syslog_duplication option.
3131 67. If what should have been the first header line of a message consisted of
3132 a space followed by a colon, Exim was mis-interpreting it as a header line.
3133 It isn't of course - it is syntactically invalid and should therefore be
3134 treated as the start of the message body. The misbehaviour could have
3135 caused a number of strange effects, including loss of data in subsequent
3136 header lines, and spool format errors.
3138 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3139 client host had authenticated. This control can now be exercised by an ACL
3140 for more flexibility.
3142 69. By default, callouts do not happen when testing with -bh. There is now a
3143 variant, -bhc, which does actually run the callout code, including
3144 consulting and updating the callout cache.
3146 70. Added support for saslauthd authentication, courtesy of Alexander
3149 71. If statvfs() failed on the spool or log directories while checking their
3150 size for availability, Exim confusingly gave the error "space shortage".
3151 Furthermore, in debugging mode it crashed with a floating point exception.
3152 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3153 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3154 serious problem, Exim now writes to the main and panic logs when this
3155 happens, with details of the failure. It then refuses to accept the
3156 incoming message, giving the message "spool directory problem" or "log
3157 directory problem" with a 421 code for SMTP messages.
3159 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3160 0, 1, and 2 exist, because some OS complain for execs without them (see
3161 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3162 descriptors. However, the code omitted to check that the open succeeded,
3163 causing mysterious errors if for some reason the permissions on /dev/null
3164 got screwed. Now Exim writes a message to the main and panic logs, and
3165 bombs out if it can't open /dev/null.
3167 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3168 interact so that it is all more flexible. It is supposed to remain
3169 backwards compatible. Also added extra_local_interfaces.
3171 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3172 to bomb out with an assertion failure - to the client this appears as a
3173 connection drop. This problem occurs in the part of the code that was taken
3174 from the Samba project. Fortunately, the assertion is in a very simple
3175 function, so I have fixed this by reproducing the function inline in the
3176 one place where it is called, and arranging for authentication to fail
3177 instead of killing the process with assert().
3179 75. The SPA client code was not working when the server requested OEM rather
3180 than Unicode encoding.
3182 76. Added code to make require_files with a specific uid setting more usable in
3183 the case where statting the file as root fails - usually a non-root-mounted
3184 NFS file system. When this happens and the failure is EACCES, Exim now
3185 forks a subprocess and does the per-uid checking as the relevant uid.
3187 77. Added process_log_path.
3189 78. If log_file_path was not explicitly set, a setting of check_log_space or
3190 check_log_inodes was ignored.
3192 79. If a space check for the spool or log partitions fails, the incident is now
3193 logged. Of course, in the latter case the data may get lost...
3195 80. Added the %p formatting code to string_format() so that it can be used to
3196 print addresses in debug_print(). Adjusted all the address printing in the
3197 debugging in store.c to use %p rather than %d.
3199 81. There was a concern that a line of code in smtp_in.c could overflow a
3200 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3201 initially expressed, the concern was not well-founded, because trailing
3202 spaces are removed early. However, if the trailing spaces were followed by
3203 a NULL, they did not get removed, so the overflow was possible. Two fixes
3206 (a) I re-wrote the offending code in a cleaner fashion.
3207 (b) If an incoming SMTP command contains a NULL character, it is rejected
3210 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3211 runs initgroups(), so that if the Exim user is in any additional groups,
3212 they will be used during message reception.
3218 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob