1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.201 2005/08/08 10:32:58 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TK/01 Added the "success_on_redirect" address verification option. See
10 NewStuff for rationale and an example.
12 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
14 PH/02 Patch to exigrep to allow it to work on syslog lines.
16 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
17 fread() to skip over the body file's header line, because in Cygwin the
18 header line is locked and is inaccessible.
20 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
21 co-exist for some time) to make it clear that it is the Exim ID that is
22 referenced, not the Message-ID: header line.
24 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
25 string_format() function, because snprintf() does not exist on all
28 PH/06 The use of forbid_filter_existstest now also locks out the use of the
29 ${stat: expansion item.
31 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
32 protocol synchronization error", to keep the pedants happy.
34 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
35 well as for IRIX systems, when gcc is being used. See the host.c source
38 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
40 PH/10 Named domain lists were not working if used in a queue_smtp_domains
43 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
44 transport and to the smtp transport in LMTP mode.
46 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
48 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
49 run a filter in a subprocess. This could lead to confusion in subsequent
50 lookups in the parent process. There should also be a search_tidyup() at
51 the end of the subprocess.
53 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
54 only if the host matched helo_try_verify_hosts, which caused the
55 verification to occur when the EHLO/HELO command was issued. The ACL just
56 tested the remembered result. Now, if a previous verification attempt has
57 not happened, "verify = helo" does it there and then.
59 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
61 TK/03 Fix log output including CR from clamd.
63 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
64 exist provoked a memory error which could cause a segfault.
66 PH/15 Installed PCRE 6.2
68 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
70 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
71 of the problem. Specifically, suggested +O2 rather than +O1 for the
78 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
80 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
81 command itself ended in error, the underlying message about the transport
82 filter timeout was being overwritten with the pipe command error. Now the
83 underlying error message should be appended to the second error message.
85 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
87 PH/02 Reduce the amount of output that "make" produces by default. Full output
88 can still be requested.
90 PH/03 The warning log line about a condition test deferring for a "warn" verb
91 was being output only once per connection, rather than after each
92 occurrence (because it was using the same function as for successful
93 "warn" verbs). This seems wrong, so I have changed it.
95 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
96 it should not have, which might have caused a crash in the right
97 circumstances, but probably never did.
99 PH/04 Installed a modified version of Tony Finch's patch to make submission
100 mode fix the return path as well as the Sender: header line, and to
101 add a /name= option so that you can make the user's friendly name appear
104 TF/03 Added the control = fakedefer ACL modifier.
106 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
107 Mark Lowes for thorough testing.
109 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
111 TK/03 Merged latest SRS patch from Miles Wilton.
113 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
114 with the definition in sysexits.h (which is #included earlier).
115 Fortunately, Exim does not actually use EX_OK. The code used to try to
116 preserve the sysexits.h value, by assumimg that macro definitions were
117 scanned for macro replacements. I have been disabused of this notion,
118 so now the code just undefines EX_OK before #including unistd.h.
120 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
121 in the smtp transport. When a block could not be written in a single
122 write() function, the timeout was being re-applied to each part-write.
123 This seems wrong - if the receiver was accepting one byte at a time it
124 would take for ever. The timeout is now adjusted when this happens. It
125 doesn't have to be particularly precise.
127 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
128 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
130 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
131 without a domain if the check to <postmaster@domain> fails.
133 SC/01 Eximstats: added -xls and the ability to specify output files
134 (patch written by Frank Heydlauf).
136 SC/02 Eximstats: use FileHandles for outputing results.
138 SC/03 Eximstats: allow any combination of xls, txt, and html output.
140 SC/04 Eximstats: fixed display of large numbers with -nvr option
142 SC/05 Eximstats: fixed merging of reports with empty tables.
144 SC/06 Eximstats: added the -include_original_destination flag
146 SC/07 Eximstats: removed tabs and trailing whitespace.
148 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
150 TK/06 MBOX spool code: Add real "From " MBOX separator line
151 so the .eml file is really in mbox format (even though
152 most programs do not really care). Patch from Alex Miller.
154 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
155 The latter is generated from $received_to and is only set if the
156 message has one envelope recipient. SA can use these headers,
157 obviously out-of-the-box. Patch from Alex Miller.
159 PH/08 The ${def test on a variable was returning false if the variable's
160 value was "0", contrary to what the specification has always said!
161 The result should be true unless the variable is empty.
163 PH/09 The syntax error of a character other than { following "${if
164 def:variable_name" (after optional whitespace) was not being diagnosed.
165 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
166 accidental colon was present, for example, could give incorrect results.
168 PH/10 Tidied the code in a number of places where the st_size field of a stat()
169 result is used (not including appendfile, where other changes are about
172 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
173 This involved changing a lot of size variables from int to off_t. It
174 should work with maildirs and everything.
176 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
177 spamd dying while we are connected to it.
179 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
182 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
183 function for BDB 4.3.
185 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
187 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
188 the sources for PCRE have been re-arranged and more files are now
191 PH/15 The code I had for printing potentially long long variables in PH/11
192 above was not the best (it lost precision). The length of off_t variables
193 is now inspected at build time, and an appropriate printing format (%ld
194 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
195 to be "long long int" or "long int". This is needed for the internal
196 formatting function string_vformat().
198 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
199 the configuration file to be ":syslog", then the script "guesses" where
200 the logs files are, rather than using the compiled in default. In our
201 case the guess is not the same as the compiled default, so the script
202 suddenly stopped working when I started to use syslog. The patch checks
203 to see if log_file_path is "". If so, it attempts to read it from exim
204 with no configuration file to get the compiled in version, before it
205 falls back to the previous guessing code."
207 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
208 implementing BATV in an Exim configuration. See NewStuff for the gory
211 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
212 Makefile that are specific to HP-UX.
214 PH/18 If the "use_postmaster" option was set for a recipient callout together
215 with the "random" option, the postmaster address was used as the MAIL
216 FROM address for the random test, but not for the subsequent recipient
217 test. It is now used for both.
219 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
220 patch removes a few documentation additions to RFC 3028, because the
221 latest draft now contains them. It adds the new en;ascii-case comparator
222 and a new error check for 8bit text in MIME parts. Comparator and
223 require names are now matched exactly. I enabled the subaddress
224 extension, but it is not well tested yet (read: it works for me)."
226 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
227 rework some of the code of TK/09 above to avoid the hardwired use of
228 "%lld" and "long long". Replaced the call to snprintf() with a call to
231 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
232 records point to non-existent hosts", "retry timeout exceeded", and
233 "retry time not reached for any host after a long failure period".
235 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
236 experimental DomainKeys support:
238 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
239 (2) On an error such as an illegally used "control", the wrong name for
240 the control was given.
242 These problems did NOT occur unless DomainKeys support was compiled.
244 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
246 PH/24 Added ${if match_ip condition.
248 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
249 databases so that it will be absolutely obvious if a crash occurs in the
250 DB library. This is a regular occurrence (often caused by mis-matched
253 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
254 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
255 picked up on a user's system that detects such things. There doesn't seem
256 to be a gcc warning option for this - only an attribute that has to be
257 put on the function's prototype. It seems that in Fedora Core 4 they have
258 set this on a number of new functions. No doubt there will be more in due
261 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
262 specify a transport. However, if an address that was verified by such a
263 router was the subject of a callout, Exim crashed because it tried to
264 read the rcpt_include_affixes from the non-existent transport. Now it
265 just assumes that the setting of that option is false. This bug was
266 introduced by 4.51/PH/31.
268 PH/28 Changed -d+all to exclude +memory, because that information is very
269 rarely of interest, but it makes the output a lot bigger. People tend to
270 do -d+all out of habit.
272 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
273 code in os-type was giving problems when libc.so lives in lib64, like on
276 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
277 aren't the modern standard, and it seems that some systems' include files
278 don't always have them. Exim was already checking for some of the newer
279 ones like T_AAAA, and defining it itself. I've added checks for all the
280 record types that Exim uses.
282 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
283 not automatically generating a new one, as it is supposed to. This
284 prevented TLS from working. If the file did exist, but contained invalid
285 data, a new version was generated, as expected. It was only the case of a
286 non-existent file that was broken.
288 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
289 with a change in libdomainkeys > 0.64.
291 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
292 from DNS. If the selector record carries the flag, it now has
293 precedence over the domain-wide flag.
295 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
297 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
298 the use of a port name that isn't defined in /etc/services) occurred, the
299 message was deferred as in a normal delivery, and thus remained on the
300 spool, instead of being failed because of the mua_wrapper setting. This
301 is now fixed, and I tidied up some of the mua_wrapper messages at the
304 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
305 the messages in a hash of arrays rather than using individual hashes.
306 This is a bit cleaner and results in dramatic memory savings, albeit
307 at a slight CPU cost.
309 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
310 as requested by Marc Sherman.
312 SC/10 Eximstats: added histograms for user specified patterns as requested
315 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
317 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
318 fopen() in the content-scanning modules that did not already have it.
324 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
325 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
327 TK/02 Fix ACL "control" statement not being available in MIME ACL.
329 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
331 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
332 to test Sieve filters that use "vacation".
334 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
335 that changes the way the GnuTLS parameters are stored in the cache file.
336 The new format can be generated externally. For backward compatibility,
337 if the data in the cache doesn't make sense, Exim assumes it has read an
338 old-format file, and it generates new data and writes a new file. This
339 means that you can't go back to an older release without removing the
342 PH/03 A redirect router that has both "unseen" and "one_time" set does not
343 work if there are any delivery delays because "one_time" forces the
344 parent to be marked "delivered", so its unseen clone is never tried
345 again. For this reason, Exim now forbids the simultaneous setting of
348 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
349 redirected to themselves ("homonym" addresses). Read the long ChangeLog
350 entry if you want to know the details. The fix, however, neglected to
351 consider the case when local delivery batching is involved. The test for
352 "previously delivered" was not happening when checking to see if an
353 address could be batched with a previous (undelivered) one; under
354 certain circumstances this could lead to multiple deliveries to the same
357 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
358 in its include files, and this causes problems building Exim.
360 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
361 header_syntax) but Exim was just ignoring anything given after a slash.
362 In particular, this caused confusion with an attempt to use "verify =
363 reverse_host_lookup/defer_ok". An error is now given when options are
364 supplied for verify items that do not have them. (Maybe reverse_host_
365 lookup should have a defer_ok option, but that's a different point.)
367 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
368 defined by RFC 821) to 2048, because there were problems with some AUTH
369 commands, and RFC 1869 says the size should be increased for extended
370 SMTP commands that take arguments.
372 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
375 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
376 "unknown" error; now it says that the functionality isn't in the binary.
378 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
379 an address' error message when a string expansion fails (syntax or
380 whatever). Otherwise the password may appear in the log. Following change
381 PH/42 below, there is no longer a chance of it appearing in a bounce
384 PH/11 Installed exipick version 20050225.0 from John Jetmore.
386 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
387 of its addresses was ever tried. (Bugzilla bug #2.)
389 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
390 the result incorrectly in the debug output. (It correctly added a newline
391 to what was transported.)
393 TF/01 Added $received_time.
395 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
396 commented out examples of how to interface to a virus scanner and to
397 SpamAssassin. Also added commented examples of av_scanner and
398 spamd_address settings.
400 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
401 and controls are allowed in which ACLs. There were a couple of minor
402 errors. Some of the entries in the conditions table (which is a table of
403 where they are NOT allowed) were getting very unwieldy; rewrote them as a
404 negation of where the condition IS allowed.
406 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
408 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
409 header file does not have a version number, so I've had to invent a new
410 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
411 API. The code is untested by me (my Linux distribution still has 0.3.2 of
412 radiusclient), but it was contributed by a Radius user.
414 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
415 files or directories, for OpenSSL.
417 PH/19 When an Exim process that is running as root has to create an Exim log
418 file, it does so in a subprocess that runs as exim:exim so as to get the
419 ownership right at creation (otherwise, other Exim processes might see
420 the file with the wrong ownership). There was no test for failure of this
421 fork() call, which would lead to the process getting stuck as it waited
422 for a non-existent subprocess. Forks do occasionally fail when resources
423 run out. I reviewed all the other calls to fork(); they all seem to check
426 PH/20 When checking for unexpected SMTP input at connect time (before writing
427 the banner), Exim was not dealing correctly with a non-positive return
428 from the read() function. If the client had disconnected by this time,
429 the result was a log entry for a synchronization error with an empty
430 string after "input=" when read() returned zero. If read() returned -1
431 (an event I could not check), uninitialized data bytes were printed.
432 There were reports of junk text (parts of files, etc) appearing after
435 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
437 PH/22 Added support for macro redefinition, and (re)definition in between
438 driver and ACL definitions.
440 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
441 forgetting to use the resulting value; it was using the unexpanded value.
443 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
444 hadn't been configured. The fix is from Juergen Kreileder, who
445 understands it better than I do:
447 "Here's what I see happening with three configured cyrus_sasl
448 authenticators configured (plain, login, cram-md5):
450 On startup auth_cyrus_sasl_init() gets called for each of these.
451 This means three calls to sasl_listmech() without a specified mech_list.
452 => SASL tests which mechs of all available mechs actually work
453 => three warnings about OTP not working
454 => the returned list contains: plain, login, cram-md5, digest-md5, ...
456 With the patch, sasl_listmech() also gets called three times. But now
457 SASL's mech_list option is set to the server_mech specified in the the
458 authenticator. Or in other words, the answer from sasl_listmech()
459 gets limited to just the mech you're testing for (which is different
461 => the return list contains just 'plain' or 'login', 'cram-md5' or
462 nothing depending on the value of ob->server_mech.
464 I've just tested the patch: Authentication still works fine,
465 unavailable mechs specified in the exim configuration are still
466 caught, and the auth.log warnings about OTP are gone."
468 PH/25 When debugging is enabled, the contents of the command line are added
469 to the debugging output, even when log_selector=+arguments is not
472 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
473 answer is "GNU", and only if the return is "GNU/something" is the answer
476 PH/27 $acl_verify_message is now set immediately after the failure of a
477 verification in an ACL, and so is available in subsequent modifiers. In
478 particular, the message can be preserved by coding like this:
480 warn !verify = sender
481 set acl_m0 = $acl_verify_message
483 Previously, $acl_verify_message was set only while expanding "message"
484 and "log_message" when a very denied access.
486 PH/28 Modified OS/os.c-Linux with
488 -#ifndef OS_LOAD_AVERAGE
489 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
491 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
492 nomenclature these days.)
494 PH/29 Installed patch from the Sieve maintainer that adds the options
495 sieve_useraddress and sieve_subaddress to the redirect router.
497 PH/30 In these circumstances:
498 . Two addresses routed to the same list of hosts;
499 . First host does not offer TLS;
500 . First host accepts first address;
501 . First host gives temporary error to second address;
502 . Second host offers TLS and a TLS session is established;
503 . Second host accepts second address.
504 Exim incorrectly logged both deliveries with the TLS parameters (cipher
505 and peerdn, if requested) that were in fact used only for the second
508 PH/31 When doing a callout as part of verifying an address, Exim was not paying
509 attention to any local part prefix or suffix that was matched by the
510 router that accepted the address. It now behaves in the same way as it
511 does for delivery: the affixes are removed from the local part unless
512 rcpt_include_affixes is set on the transport.
514 PH/32 Add the sender address, as F=<...>, to the log line when logging a
515 timeout during the DATA phase of an incoming message.
517 PH/33 Sieve envelope tests were broken for match types other than :is. I have
518 applied a patch sanctioned by the Sieve maintainer.
520 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
521 the uid or gid is negative. A case of a negative gid caused this to be
522 noticed. The fix allows for either to be negative.
524 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
525 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
528 PH/36 The change PH/12 above was broken. Fixed it.
530 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
531 the grounds that routing the same address twice would always produce the
532 same answer. This might have been true once, but it is certainly no
533 longer true now. Routing a child address may depend on the previous
534 routing that produced that child. Some complicated redirection strategies
535 went wrong when messages had multiple recipients, and made Exim's
536 behaviour dependent on the order in which the addresses were given.
538 I have moved the duplicate checking until after the routing is complete.
539 Exim scans the addresses that are assigned to local and remote
540 transports, and removes any duplicates. This means that more work will be
541 done, as duplicates will always all be routed, but duplicates are
542 presumably rare, so I don't expect this is of any significance.
544 For deliveries to pipes, files, and autoreplies, the duplicate checking
545 still happens during the routing process, since they are not going to be
548 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
549 It corrects a timeout issue with spamd. This is Ian's comment: "The
550 background is that sometimes spamd either never reads data from a
551 connection it has accepted, or it never writes response data. The exiscan
552 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
553 blindly assumes that writes won't block so it may never time out."
555 PH/39 Allow G after quota size as well as K and M.
557 PH/40 The value set for $authenticated_id in an authenticator may not contain
558 binary zeroes or newlines because the value is written to log lines and
559 to spool files. There was no check on this. Now the value is run through
560 the string_printing() function so that such characters are converted to
561 printable escape sequences.
563 PH/41 $message_linecount is a new variable that contains the total number of
564 lines in the message. Compare $body_linecount, which is the count for the
567 PH/42 Exim no longer gives details of delivery errors for specific addresses in
568 bounce and delay warning messages, except in certain special cases, which
571 (a) An SMTP error message from a remote host;
572 (b) A message specified in a :fail: redirection;
573 (c) A message specified in a "fail" command in a system filter;
574 (d) A message specified in a FAIL return from the queryprogram router;
575 (e) A message specified by the cannot_route_message router option.
577 In these cases only, Exim does include the error details in bounce and
578 warning messages. There are also a few cases where bland messages such
579 as "unrouteable address" or "local delivery error" are given.
581 PH/43 $value is now also set for the "else" part of a ${run expansion.
583 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
584 being worked on, but at least Exim now implements the latest version to
587 PH/45 In a pipe transport, although a timeout while waiting for the pipe
588 process to complete was treated as a delivery failure, a timeout while
589 writing the message to the pipe was logged, but erroneously treated as a
590 successful delivery. Such timeouts include transport filter timeouts. For
591 consistency with the overall process timeout, these timeouts are now
592 treated as errors, giving rise to delivery failures by default. However,
593 there is now a new Boolean option for the pipe transport called
594 timeout_defer, which, if set TRUE, converts the failures into defers for
595 both kinds of timeout. A transport filter timeout is now identified in
598 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
599 systems where "make" and "gmake" are different, calling "gmake" at top
600 level broke things. I've arranged for the value of $(MAKE) to be passed
601 from the Makefile to this script so that it can call the same version of
605 A note about Exim versions 4.44 and 4.50
606 ----------------------------------------
608 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
609 changes of various kinds. As a consequence, a big documentation update was
610 needed. This delayed the release for rather longer than seemed good, especially
611 in the light of a couple of (minor) security issues. Therefore, the changes
612 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
613 release. So 4.44 and 4.50 are in effect two different branches that both start
616 I have left the 4.50 change log unchanged; it contains all the changes since
617 4.43. The change log for 4.44 is below; many of its items are identical to
618 those for 4.50. This seems to be the most sensible way to preserve the
619 historical information.
625 1. Minor wording change to the doc/README.SIEVE file.
627 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
628 computation of the current number of files was incorrect.
630 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
631 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
634 4. Give more explanation in the error message when the command for a transport
635 filter fails to execute.
637 5. There are several places where Exim runs a non-Exim command in a
638 subprocess. The SIGUSR1 signal should be disabled for these processes. This
639 was being done only for the command run by the queryprogram router. It is
640 now done for all such subprocesses. The other cases are: ${run, transport
641 filters, and the commands run by the lmtp and pipe transports.
643 6. Added CONFIGURE_GROUP build-time option.
645 7. Some older OS have a limit of 256 on the maximum number of file
646 descriptors. Exim was using setrlimit() to set 1000 as a large value
647 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
648 systems. I've change it so that if it can't get 1000, it tries for 256.
650 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
651 was an oversight, and furthermore, ever since the addition of extra
652 controls (e.g. 4.43/32), the checks on when to allow different forms of
653 "control" were broken. There should now be diagnostics for all cases when a
654 control that does not make sense is encountered.
656 9. Added the /retain_sender option to "control=submission".
658 10. $recipients is now available in the predata ACL (oversight).
660 11. Tidy the search cache before the fork to do a delivery from a message
661 received from the command line. Otherwise the child will trigger a lookup
662 failure and thereby defer the delivery if it tries to use (for example) a
663 cached ldap connection that the parent has called unbind on.
665 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
666 of $address_data from the recipient verification was clobbered by the
669 13. The value of address_data from a sender verification is now available in
670 $sender_address_data in subsequent conditions in the ACL statement.
672 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
674 15. Added a new option "connect=<time>" to callout options, to set a different
677 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
678 was its contents. (It was OK if the option was not defined at all.)
680 17. A "Completed" log line is now written for messages that are removed from
681 the spool by the -Mrm option.
683 18. New variables $sender_verify_failure and $recipient_verify_failure contain
684 information about exactly what failed.
686 19. Added -dd to debug only the daemon process.
688 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
689 handles timeouts, both on the server side and network timeouts. Renamed the
690 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
692 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
693 It is now set to "smtps".
695 22. $host_address is now set to the target address during the checking of
698 23. When checking ignore_target_hosts for an ipliteral router, no host name was
699 being passed; this would have caused $sender_host_name to have been used if
700 matching the list had actually called for a host name (not very likely,
701 since this list is usually IP addresses). A host name is now passed as
704 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
705 code that specifies a non-restarting handler (typically sigaction() in
706 modern systems) in an attempt to fix a rare and obscure crash bug.
708 25. Narrowed the window for a race in the daemon that could cause it to ignore
709 SIGCHLD signals. This is not a major problem, because they are used only to
710 wake it up if nothing else does.
712 26. A malformed maildirsize file could cause Exim to calculate negative values
713 for the mailbox size or file count. Odd effects could occur as a result.
714 The maildirsize information is now recalculated if the size or filecount
717 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
718 support for a long time. Removed HAVE_SYS_VFS_H.
720 28. Installed the latest version of exipick from John Jetmore.
722 29. In an address list, if the pattern was not a regular expression, an empty
723 subject address (from a bounce message) matched only if the pattern was an
724 empty string. Non-empty patterns were not even tested. This was the wrong
725 because it is perfectly reasonable to use an empty address as part of a
726 database query. An empty address is now tested by patterns that are
727 lookups. However, all the other forms of pattern expect the subject to
728 contain a local part and a domain, and therefore, for them, an empty
729 address still always fails if the pattern is not itself empty.
731 30. Exim went into a mad DNS loop when attempting to do a callout where the
732 host was specified on an smtp transport, and looking it up yielded more
735 31. Re-factored the code for checking spool and log partition space into a
736 function that finds that data and another that does the check. The former
737 is then used to implement four new variables: $spool_space, $log_space,
738 $spool_inodes, and $log_inodes.
740 32. The RFC2047 encoding function was originally intended for short strings
741 such as real names; it was not keeping to the 75-character limit for
742 encoded words that the RFC imposes. It now respects the limit, and
743 generates multiple encoded words if necessary. To be on the safe side, I
744 have increased the buffer size for the ${rfc2047: expansion operator from
747 33. It is now permitted to omit both strings after an "if" condition; if the
748 condition is true, the result is "true". As before, when the second string
749 is omitted, a false condition yields an empty string. This makes it less
750 cumbersome to write custom ACL and router conditions.
752 34. Failure to deliver a bounce message always caused it to be frozen, even if
753 there was an errors_to setting on the router. The errors_to setting is now
756 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
757 canonical form (fully expanded) before being placed in
758 $sender_host_address.
760 36. The table in the code that translates DNS record types into text (T_A to
761 "A" for instance) was missing entries for NS and CNAME. It is just possible
762 that this could have caused confusion if both these types were looked up
763 for the same domain, because the text type is used as part of Exim's
764 per-process caching. But the chance of anyone hitting this buglet seems
767 37. The dnsdb lookup has been extended in a number of ways.
769 (1) There is a new type, "zns", which walks up the domain tree until it
770 finds some nameserver records. It should be used with care.
772 (2) There is a new type, "mxh", which is like "mx" except that it returns
773 just the host names, not the priorities.
775 (3) It is now possible to give a list of domains (or IP addresses) to be
776 looked up. The behaviour when one of the lookups defers can be
777 controlled by a keyword.
779 (4) It is now possible to specify the separator character for use when
780 multiple records are returned.
782 38. The dnslists ACL condition has been extended: it is now possible to supply
783 a list of IP addresses and/or domains to be looked up in a particular DNS
786 39. Added log_selector=+queue_time_overall.
788 40. When running the queue in the test harness, wait just a tad after forking a
789 delivery process, to get repeatability of debugging output.
791 41. Include certificate and key file names in error message when GnuTLS fails
792 to set them up, because the GnuTLS error message doesn't include the name
793 of the failing file when there is a problem reading it.
795 42. Allow both -bf and -bF in the same test run.
797 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
799 44. The "Exiscan patch" is now merged into the mainline Exim source.
801 45. Sometimes the final signoff response after QUIT could fail to get
802 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
803 < 0 before doing a fflush(). This bug looks as though it goes back to the
804 introduction of TLS in release 3.20, but "sometimes" must have been rare
805 because the tests only now provoked it.
807 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
808 (this can affect the format of dates).
810 47. exim_tidydb, when checking for the continued existence of a message for
811 which it has found a message-specific retry record, was not finding
812 messages that were in split spool directories. Consequently, it was
813 deleting retry records that should have stayed in existence.
815 48. Steve fixed some bugs in eximstats.
817 49. The SPA authentication driver was not abandoning authentication and moving
818 on to the next authenticator when an expansion was forced to fail,
819 contradicting the general specification for all authenticators. Instead it
820 was generating a temporary error. It now behaves as specified.
822 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
823 (the order specifies the preference for clients). The order is now AES256,
824 AES128, 3DES, ARCFOUR128.
826 51. Small patch to Sieve code - explicitly set From: when generating an
829 52. Exim crashed if a remote delivery caused a very long error message to be
830 recorded - for instance if somebody sent an entire SpamAssassin report back
831 as a large number of 550 error lines. This bug was coincidentally fixed by
832 increasing the size of one of Exim's internal buffers (big_buffer) that
833 happened as part of the Exiscan merge. However, to be on the safe side, I
834 have made the code more robust (and fixed the comments that describe what
837 53. Now that there can be additional text after "Completed" in log lines (if
838 the queue_time_overall log selector is set), a one-byte patch to exigrep
839 was needed to allow it to recognize "Completed" as not the last thing in
842 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
843 patch that reportedly fixes this has been added. I am not expert enough to
844 create a test for it. This is what the patch creator wrote:
846 "I found a little strange behaviour of ldap code when working with
847 Windows 2003 AD Domain, where users was placed in more than one
848 Organization Units. When I tried to give exim partial DN, the exit code
849 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
850 But simultaneously result of request was absolutely normal ldap result,
851 so I produce this patch..."
853 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
854 REFERENCE, so I have modified the code to exclude the patch when that macro
857 55. Some experimental protocols are using DNS PTR records for new purposes. The
858 keys for these records are domain names, not reversed IP addresses. The
859 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
860 leaves it alone. Component reversal etc. now happens only for IP addresses.
863 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
865 57. Double the size of the debug message buffer (to 2048) so that more of very
866 long debug lines gets shown.
868 58. The exicyclog utility now does better if the number of log files to keep
869 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
871 59. Two changes related to the smtp_active_hostname option:
873 (1) $smtp_active_hostname is now available as a variable.
874 (2) The default for smtp_banner uses $smtp_active_hostname instead
875 of $primary_hostname.
877 60. The host_aton() function is supposed to be passed a string that is known
878 to be a valid IP address. However, in the case of IPv6 addresses, it was
879 not checking this. This is a hostage to fortune. Exim now panics and dies
880 if the condition is not met. A case was found where this could be provoked
881 from a dnsdb PTR lookup with an IPv6 address that had more than 8
882 components; fortuitously, this particular loophole had already been fixed
883 by change 4.50/55 above.
885 If there are any other similar loopholes, the new check in host_aton()
886 itself should stop them being exploited. The report I received stated that
887 data on the command line could provoke the exploit when Exim was running as
888 exim, but did not say which command line option was involved. All I could
889 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
893 61. There was a buffer overflow vulnerability in the SPA authentication code
894 (which came originally from the Samba project). I have added a test to the
895 spa_base64_to_bits() function which I hope fixes it.
898 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
899 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
901 63. The daemon start-up calls getloadavg() while still root for those OS that
902 need the first call to be done as root, but it missed one case: when
903 deliver_queue_load_max is set with deliver_drop_privilege. This is
904 necessary for the benefit of the queue runner, because there is no re-exec
905 when deliver_drop_privilege is set.
907 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
910 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
911 was in use, was not putting the data itself into the right store pool;
912 consequently, it could be overwritten for a subsequent message in the same
913 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
916 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
918 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
919 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
920 the function were treating the return as a boolean value, which happened to
921 work because 0=false and not-0=true, but is not correct code.
923 68. The host_aton() function was not handling scoped IPv6 addresses (those
924 with, for example, "%eth0" on the end) correctly.
926 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
927 negated items (that is, ~something) in unsigned ints. Some compilers
928 apparently mutter when there is no cast.
930 70. If an address verification called from an ACL failed, and did not produce a
931 user-specific message (i.e. there was only a "system" message), nothing was
932 put in $acl_verify_message. In this situation, it now puts the system
935 71. Change 4.23/11 added synchronization checking at the start of an SMTP
936 session; change 4.31/43 added the unwanted input to the log line - except
937 that it did not do this in the start of session case. It now does.
939 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
940 This is wrong and can cause the other end to generate a synchronization
941 error if it is another Exim or anything else that does the synchronization
942 check. A QUIT command is no longer sent after a timeout.
944 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
947 74. The defer_ok option of callout verification was not working if it was used
948 when verifying addresses in header lines, that is, for this case:
950 verify = header_sender/callout=defer_ok
952 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
953 those file descriptors could be used for SMTP connections. If anything
954 wrote to stderr (the example that came up was "warn" in embedded Perl), it
955 could be sent to the SMTP client, causing chaos. The daemon now opens
956 stdin, stdout, and stderr to /dev/null when it puts itself into the
959 76. Arrange for output from Perl's "warn" command to be written to Exim's main
960 log by default. The user can override this with suitable Perl magic.
962 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
963 the log message when discard triggers, was not working for the DATA ACL or
964 for the non-SMTP ACL.
966 78. Error message wording change in sieve.c.
968 79. If smtp_accept_max_per_host was set, the number of connections could be
969 restricted to fewer than expected, because the daemon was trying to set up
970 a new connection before checking whether the processes handling previous
971 connections had finished. The check for completed processes is now done
972 earlier. On busy systems, this bug wouldn't be noticed because something
973 else would have woken the daemon, and it would have reaped the completed
976 80. If a message was submitted locally by a user whose login name contained one
977 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
978 It caused a spool format error. I have fixed the spool reading code. A
979 related problem was that the "from" clause in the Received: line became
980 illegal because of the space(s). It is now covered by ${quote_local_part.
982 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
985 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
987 83. Patch from Sieve maintainer to fix unterminated string problem in
990 84. Some minor changes to the Linux configuration files to help with other
991 OS variants using glibc.
993 85. One more patch for Sieve to update vacation handling to latest spec.
996 ----------------------------------------------------
997 See the note above about the 4.44 and 4.50 releases.
998 ----------------------------------------------------
1004 1. Change 4.43/35 introduced a bug that caused file counts to be
1005 incorrectly computed when quota_filecount was set in an appendfile
1008 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1009 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1012 3. Give more explanation in the error message when the command for a transport
1013 filter fails to execute.
1015 4. There are several places where Exim runs a non-Exim command in a
1016 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1017 was being done only for the command run by the queryprogram router. It is
1018 now done for all such subprocesses. The other cases are: ${run, transport
1019 filters, and the commands run by the lmtp and pipe transports.
1021 5. Some older OS have a limit of 256 on the maximum number of file
1022 descriptors. Exim was using setrlimit() to set 1000 as a large value
1023 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1024 systems. I've change it so that if it can't get 1000, it tries for 256.
1026 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1027 was an oversight, and furthermore, ever since the addition of extra
1028 controls (e.g. 4.43/32), the checks on when to allow different forms of
1029 "control" were broken. There should now be diagnostics for all cases when a
1030 control that does not make sense is encountered.
1032 7. $recipients is now available in the predata ACL (oversight).
1034 8. Tidy the search cache before the fork to do a delivery from a message
1035 received from the command line. Otherwise the child will trigger a lookup
1036 failure and thereby defer the delivery if it tries to use (for example) a
1037 cached ldap connection that the parent has called unbind on.
1039 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1040 of $address_data from the recipient verification was clobbered by the
1041 sender verification.
1043 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1044 was its contents. (It was OK if the option was not defined at all.)
1046 11. A "Completed" log line is now written for messages that are removed from
1047 the spool by the -Mrm option.
1049 12. $host_address is now set to the target address during the checking of
1050 ignore_target_hosts.
1052 13. When checking ignore_target_hosts for an ipliteral router, no host name was
1053 being passed; this would have caused $sender_host_name to have been used if
1054 matching the list had actually called for a host name (not very likely,
1055 since this list is usually IP addresses). A host name is now passed as
1058 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1059 code that specifies a non-restarting handler (typically sigaction() in
1060 modern systems) in an attempt to fix a rare and obscure crash bug.
1062 15. Narrowed the window for a race in the daemon that could cause it to ignore
1063 SIGCHLD signals. This is not a major problem, because they are used only to
1064 wake it up if nothing else does.
1066 16. A malformed maildirsize file could cause Exim to calculate negative values
1067 for the mailbox size or file count. Odd effects could occur as a result.
1068 The maildirsize information is now recalculated if the size or filecount
1071 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1072 support for a long time. Removed HAVE_SYS_VFS_H.
1074 18. Updated exipick to current release from John Jetmore.
1076 19. Allow an empty sender to be matched against a lookup in an address list.
1077 Previously the only cases considered were a regular expression, or an
1080 20. Exim went into a mad DNS lookup loop when doing a callout where the
1081 host was specified on the transport, if the DNS lookup yielded more than
1084 21. The RFC2047 encoding function was originally intended for short strings
1085 such as real names; it was not keeping to the 75-character limit for
1086 encoded words that the RFC imposes. It now respects the limit, and
1087 generates multiple encoded words if necessary. To be on the safe side, I
1088 have increased the buffer size for the ${rfc2047: expansion operator from
1091 22. Failure to deliver a bounce message always caused it to be frozen, even if
1092 there was an errors_to setting on the router. The errors_to setting is now
1095 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1096 canonical form (fully expanded) before being placed in
1097 $sender_host_address.
1099 24. Updated eximstats to version 1.33
1101 25. Include certificate and key file names in error message when GnuTLS fails
1102 to set them up, because the GnuTLS error message doesn't include the name
1103 of the failing file when there is a problem reading it.
1105 26. Expand error message when OpenSSL has problems setting up cert/key files.
1108 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
1109 (this can affect the format of dates).
1111 28. exim_tidydb, when checking for the continued existence of a message for
1112 which it has found a message-specific retry record, was not finding
1113 messages that were in split spool directories. Consequently, it was
1114 deleting retry records that should have stayed in existence.
1116 29. eximstats updated to version 1.35
1117 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1118 1.35 - bugfix such that pie charts by volume are generated correctly
1120 30. The SPA authentication driver was not abandoning authentication and moving
1121 on to the next authenticator when an expansion was forced to fail,
1122 contradicting the general specification for all authenticators. Instead it
1123 was generating a temporary error. It now behaves as specified.
1125 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
1126 (the order specifies the preference for clients). The order is now AES256,
1127 AES128, 3DES, ARCFOUR128.
1129 31. Small patch to Sieve code - explicitly set From: when generating an
1132 32. Exim crashed if a remote delivery caused a very long error message to be
1133 recorded - for instance if somebody sent an entire SpamAssassin report back
1134 as a large number of 550 error lines. This bug was coincidentally fixed by
1135 increasing the size of one of Exim's internal buffers (big_buffer) that
1136 happened as part of the Exiscan merge. However, to be on the safe side, I
1137 have made the code more robust (and fixed the comments that describe what
1140 33. Some experimental protocols are using DNS PTR records for new purposes. The
1141 keys for these records are domain names, not reversed IP addresses. The
1142 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1143 leaves it alone. Component reversal etc. now happens only for IP addresses.
1146 34. The host_aton() function is supposed to be passed a string that is known
1147 to be a valid IP address. However, in the case of IPv6 addresses, it was
1148 not checking this. This is a hostage to fortune. Exim now panics and dies
1149 if the condition is not met. A case was found where this could be provoked
1150 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1151 components; fortuitously, this particular loophole had already been fixed
1152 by change 4.50/55 or 4.44/33 above.
1154 If there are any other similar loopholes, the new check in host_aton()
1155 itself should stop them being exploited. The report I received stated that
1156 data on the command line could provoke the exploit when Exim was running as
1157 exim, but did not say which command line option was involved. All I could
1158 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1159 running as the user.
1162 35. There was a buffer overflow vulnerability in the SPA authentication code
1163 (which came originally from the Samba project). I have added a test to the
1164 spa_base64_to_bits() function which I hope fixes it.
1167 36. The daemon start-up calls getloadavg() while still root for those OS that
1168 need the first call to be done as root, but it missed one case: when
1169 deliver_queue_load_max is set with deliver_drop_privilege. This is
1170 necessary for the benefit of the queue runner, because there is no re-exec
1171 when deliver_drop_privilege is set.
1173 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1174 was in use, was not putting the data itself into the right store pool;
1175 consequently, it could be overwritten for a subsequent message in the same
1176 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1179 38. Sometimes the final signoff response after QUIT could fail to get
1180 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1181 < 0 before doing a fflush(). This bug looks as though it goes back to the
1182 introduction of TLS in release 3.20, but "sometimes" must have been rare
1183 because the tests only now provoked it.
1189 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1190 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1191 Now it returns an integer. A number of calls were still expecting a T/F
1192 return. Fortuitously, in all cases, the tests worked in OK situations,
1193 which is the norm. However, things would have gone wrong on any write
1194 failures on the smtp file descriptor. This function is used when sending
1195 messages over SMTP and also when doing verify callouts.
1197 2. When Exim is called to do synchronous delivery of a locally submitted
1198 message (the -odf or -odi options), it no longer closes stderr before doing
1201 3. Implemented the mua_wrapper option.
1203 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1205 5. Implemented the functions header_remove(), header_testname(),
1206 header_add_at_position(), and receive_remove_recipient(), and exported them
1209 6. If an ACL "warn" statement specified the addition of headers, Exim already
1210 inserted X-ACL-Warn: at the start if there was no header name. However, it
1211 was not making this test for the second and subsequent header lines if
1212 there were newlines in the string. This meant that an invalid header could
1213 be inserted if Exim was badly configured.
1215 7. Allow an ACL "warn" statement to add header lines at the start or after all
1216 the Received: headers, as well as at the end.
1218 8. Added the rcpt_4xx retry error code.
1220 9. Added postmaster_mailfrom=xxx to callout verification option.
1222 10. Added mailfrom=xxxx to the callout verification option, for verify=
1225 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1226 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1228 12. Inserted some casts to stop certain compilers warning when using pointer
1229 differences as field lengths or precisions in printf-type calls (mostly
1230 affecting debugging statements).
1232 13. Added optional readline() support for -be (dynamically loaded).
1234 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1235 same clock tick as a message's arrival, so that its received time was the
1236 same as the "first fail" time on the retry record, and that message
1237 remained on the queue past the ultimate address timeout, every queue runner
1238 would try a delivery (because it was past the ultimate address timeout) but
1239 after another failure, the ultimate address timeout, which should have then
1240 bounced the address, did not kick in. This was a "< instead of <=" error;
1241 in most cases the first failure would have been in the next clock tick
1242 after the received time, and all would be well.
1244 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1245 being recognized when the domain list was tested by the match_domain
1246 condition in an expansion string.
1248 16. Added the ${str2b64: operator.
1250 17. Exim was always calling setrlimit() to set a large limit for the number of
1251 processes, without checking whether the existing limit was already
1252 adequate. (It did check for the limit on file descriptors.) Furthermore,
1253 errors from getrlimit() and setrlimit() were being ignored. Now they are
1254 logged to the main and panic logs, but Exim does carry on, to try to do its
1255 job under whatever limits there are.
1257 18. Imported PCRE 5.0.
1259 19. Trivial typo in log message " temporarily refused connection" (the leading
1262 20. If the log selector return_path_on_delivery was set and an address was
1263 redirected to /dev/null, the delivery process crashed because it assumed
1264 that a return path would always be set for a "successful" delivery. In this
1265 case, the whole delivery is bypassed as an optimization, and therefore no
1268 21. Internal re-arrangement: the function for sending a challenge and reading
1269 a response while authentication was assuming a zero-terminated challenge
1270 string. It's now changed to take a pointer and a length, to allow for
1271 binary data in such strings.
1273 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1275 23. Exim was not respecting finduser_retries when seeking the login of the
1276 uid under which it was called; it was always trying 10 times. (The default
1277 setting of finduser_retries is zero.) Also, it was sleeping after the final
1278 failure, which is pointless.
1280 24. Implemented tls_on_connect_ports.
1282 25. Implemented acl_smtp_predata.
1284 26. If the domain in control=submission is set empty, Exim assumes that the
1285 authenticated id is a complete email address when it generates From: or
1286 Sender: header lines.
1288 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1289 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1290 chown and chgrp in /bin and hostname in /usr/bin.
1292 28. Exim was keeping the "process log" file open after each use, just as it
1293 does for the main log. This opens the possibility of it remaining open for
1294 long periods when the USR1 signal hits a daemon. Occasional processlog
1295 errors were reported, that could have been caused by this. Anyway, it seems
1296 much more sensible not to leave this file open at all, so that is what now
1299 29. The long-running daemon process does not normally write to the log once it
1300 has entered its main loop, and it closes the log before doing so. This is
1301 so that log files can straightforwardly be renamed and moved. However,
1302 there are a couple of unusual error situations where the daemon does write
1303 log entries, and I had neglected to close the log afterwards.
1305 30. The text of an SMTP error response that was received during a remote
1306 delivery was being truncated at 512 bytes. This is too short for some of
1307 the long messages that one sometimes sees. I've increased the limit to
1310 31. It is now possible to make retry rules that apply only when a message has a
1311 specific sender, in particular, an empty sender.
1313 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1314 it possible to be selective about when SMTP synchronization is enforced.
1316 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1318 32. Implemented hosts_connection_nolog.
1320 33. Added an ACL for QUIT.
1322 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1325 35. Added mailbox_size and mailbox_filecount to appendfile.
1327 36. Added control = no_multiline_responses to ACLs.
1329 37. There was a bug in the logic of the code that waits for the clock to tick
1330 in the case where the clock went backwards by a substantial amount such
1331 that the microsecond fraction of "now" was more than the microsecond
1332 fraction of "then" (but the whole seconds number was less).
1334 38. Added support for the libradius Radius client library this is found on
1335 FreeBSD (previously only the radiusclient library was supported).
1341 1. When certain lookups returned multiple values in the form name=value, the
1342 quoting of the values was not always being done properly. Specifically:
1343 (a) If the value started with a double quote, but contained no whitespace,
1345 (b) If the value contained whitespace other than a space character (i.e.
1346 tabs or newlines or carriage returns) it was not quoted.
1347 This fix has been applied to the mysql and pgsql lookups by writing a
1348 separate quoting function and calling it from the lookup code. The fix
1349 should probably also be applied to nisplus, ibase and oracle lookups, but
1350 since I cannot test any of those, I have not disturbed their existing code.
1352 2. A hit in the callout cache for a specific address caused a log line with no
1353 reason for rejecting RCPT. Now it says "Previous (cached) callout
1354 verification failure".
1356 3. There was an off-by-one bug in the queryprogram router. An over-long
1357 return line was truncated at 256 instead of 255 characters, thereby
1358 overflowing its buffer with the terminating zero. As well as fixing this, I
1359 have increased the buffer size to 1024 (and made a note to document this).
1361 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1362 when Exim is waiting for an SMTP response from a remote server, Exim
1363 restarts its select() call on the socket, thereby resetting its timeout.
1364 This is not a problem when such interrupts are rare. Somebody set up a cron
1365 job to run exiwhat every 2 minutes, which is less than the normal select()
1366 timeout (5 or 10 minutes). This meant that the select() timeout never
1367 kicked in because it was always reset. I have fixed this by comparing the
1368 time when an interrupt arrives with the time at the start of the first call
1369 to select(). If more time than the timeout has elapsed, the interrupt is
1370 treated as a timeout.
1372 5. Some internal re-factoring in preparation for the addition of Sieve
1373 extensions (by MH). In particular, the "personal" test is moved to a
1374 separate function, and given an option for scanning Cc: and Bcc: (which is
1375 not set for Exim filters).
1377 6. When Exim created an email address using the login of the caller as the
1378 local part (e.g. when creating a From: or Sender: header line), it was not
1379 quoting the local part when it contained special characters such as @.
1381 7. Installed new OpenBSD configuration files.
1383 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1384 try to make them clearer.
1386 9. Callout options, other than the timeout value, were being ignored when
1387 verifying sender addresses in header lines. For example, when using
1389 verify = header_sender/callout=no_cache
1391 the cache was (incorrectly) being used.
1393 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1394 only the Cygwin environment.
1396 11. When return_path_on_delivery was set as a log selector, if different remote
1397 addresses in the same message used different return paths and parallel
1398 remote delivery occurred, the wrong values would sometimes be logged.
1399 (Whenever a remote delivery process finished, the return path value from
1400 the most recently started remote delivery process was logged.)
1402 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1403 lines when AUTH and/or TLS are in use. This is the "received protocol"
1404 field. Exim used to use "asmtp" for authenticated SMTP, without any
1405 indication (in the protocol name) for TLS use. Now it follows the RFC and
1406 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1407 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1408 names appear in log lines as well as in Received: header lines.
1410 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1411 extensions, and comparison tests, and to fix some bugs.
1413 14. Changes to the "personal" filter test:
1415 (1) The test was buggy in that it was just doing the equivalent of
1416 "contains" tests on header lines. For example, if a user's address was
1417 anne@some.where, the "personal" test would incorrectly be true for
1419 To: susanne@some.where
1421 This test is now done by extracting each address from the header in turn,
1422 and checking the entire address. Other tests that are part of "personal"
1423 are now done using regular expressions (for example, to check local parts
1424 of addresses in From: header lines).
1426 (2) The list of non-personal local parts in From: addresses has been
1427 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1428 taken from the Sieve specification recommendations.
1430 (3) If the message contains any header line starting with "List-" it is
1431 treated as non-personal.
1433 (4) The test for "circular" in the Subject: header line has been removed
1434 because it now seems ill-conceived.
1436 15. Minor typos in src/EDITME comments corrected.
1438 16. Installed latest exipick from John Jetmore.
1440 17. If headers_add on a router specified a text string that was too long for
1441 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1442 of string_sprintf() is now avoided.
1444 18. $message_body_size was not set (it was always zero) when running the DATA
1445 ACL and the local_scan() function.
1447 19. For the "mail" command in an Exim filter, no default was being set for
1448 the once_repeat time, causing a random time value to be used if "once" was
1449 specified. (If the value happened to be <= 0, no repeat happened.) The
1450 default is now 0s, meaning "never repeat". The "vacation" command was OK
1451 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1452 (I found it when inspecting the code).
1454 20. There is now an overall timeout for performing a callout verification. It
1455 defaults to 4 times the callout timeout, which applies to individual SMTP
1456 commands during the callout. The overall timeout applies when there is more
1457 than one host that can be tried. The timeout is checked before trying the
1458 next host. This prevents very long delays if there are a large number of
1459 hosts and all are timing out (e.g. when the network connections are timing
1460 out). The value of the overall timeout can be changed by specifying an
1461 additional sub-option for "callout", called "maxwait". For example:
1463 verify = sender/callout=5s,maxwait=20s
1465 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1466 to the end before writing, but this should make it even safer).
1468 22. Exim was forgetting that it had advertised PIPELINING for the second and
1469 subsequent messages on an SMTP connection. It was also not resetting its
1470 memory on STARTTLS and an internal HELO.
1472 23. When Exim logs an SMTP synchronization error within a session, it now
1473 records whether PIPELINING has been advertised or not.
1475 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1476 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1477 rather than long int.
1479 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1481 26. Added the never_mail option to autoreply.
1487 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1488 crash if the getsockname() call failed; this can happen if a connection is
1489 closed very soon after it is established. The problem was simply in the
1490 order in which certain operations were done, causing Exim to try to write
1491 to the SMTP stream before it had set up the file descriptor. The bug has
1492 been fixed by making things happen in the correct order.
1498 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1499 before the connection was closed, thus losing the rejection response.
1501 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1502 some early Solaris releases, but causes trouble in current releases where
1503 socklen_t is defined.
1505 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1508 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1511 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1512 that releasing the top of it at the end releases what was used for sub-
1513 expansions (unless the block got too big). However, discard this block if
1514 the first thing is a variable or header, so that we can use its block when
1515 it is dynamic (useful for very large $message_headers, for example).
1517 6. Lookups now cache *every* query, not just the most recent. A new, separate
1518 store pool is used for this. It can be recovered when all lookup caches are
1519 flushed. Lookups now release memory at the end of their result strings.
1520 This has involved some general refactoring of the lookup sources.
1522 7. Some code has been added to the store_xxx() functions to reduce the amount
1523 of flapping under certain conditions.
1525 8. log_incoming_interface used to affect only the <= reception log lines. Now
1526 it causes the local interface and port to be added to several more SMTP log
1527 lines, for example "SMTP connection from", and rejection lines.
1529 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1531 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1533 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1534 could be overwritten at the end of the current message (or the start of a
1535 new message if it was set in a HELO ACL). The value is now preserved for
1536 the duration of the SMTP connection.
1538 12. If a transport had a headers_rewrite setting, and a matching header line
1539 contained an unqualified address, that address was qualified, even if it
1540 did not match any rewriting rules. The underlying bug was that the values
1541 of the flags that permit the existence of unqualified sender and recipient
1542 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1543 non-local messages, and by -bnq for local messages) were not being
1544 preserved with the message after it was received.
1546 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1547 "next input=" as part of the text comprising the host identity instead of
1548 the correct text. The code was using the same buffer for two different
1549 strings. However, depending on which order the printing function evaluated
1550 its arguments, the bug did not always show up. Under Linux, for example, my
1551 test suite worked just fine.
1553 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1554 doesn't work with some older versions of Perl. It has been changed to "my",
1555 which in any case is probably the better facility to use.
1557 15. A really picky compiler found some instances of statements for creating
1558 error messages that either had too many or two few arguments for the format
1561 16. The size of the buffer for calls to the DNS resolver has been increased
1562 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1563 for addresses that have a lot of PTR records. This alleviates a problem; it
1564 does not fully solve it.
1566 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1567 buffer now truncates the list and logs the incident, which is the same
1568 action as happens when Exim is looking up a host name and its aliases.
1569 Previously in this situation something unpredictable would happen;
1570 sometimes it was "internal error: store_reset failed".
1572 18. If a server dropped the connection unexpectedly when an Exim client was
1573 using GnuTLS and trying to read a response, the client delivery process
1574 crashed while trying to generate an error log message.
1576 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1577 string, for example:
1579 warn message = H1: something\nH2: something
1581 the text was added as a single header line from Exim's point of view
1582 though it ended up OK in the delivered message. However, searching for the
1583 second and subsequent header lines using $h_h2: did not work. This has been
1584 fixed. Similarly, if a system filter added multiple headers in this way,
1585 the routers could not see them.
1587 20. Expanded the error message when iplsearch is called with an invalid key to
1588 suggest using net-iplsearch in a host list.
1590 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1591 ACLs are no longer actually imposed (and a message to that effect is
1594 22. If a "gecos" field in a passwd entry contained escaped characters, in
1595 particular, if it contained a \" sequence, Exim got it wrong when building
1596 a From: or a Sender: header from that name. A second bug also caused
1597 incorrect handling when an unquoted " was present following a character
1598 that needed quoting.
1600 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1601 was not being matched caselessly.
1603 24. Arranged for all hyphens in the exim.8 source to be escaped with
1606 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1607 properly. Recipient callout cache records were still being keyed to include
1608 the sender, even when use_sender was set false. This led to far more
1609 callouts that were necessary. The sender is no longer included in the key
1610 when use_sender is false.
1612 26. Added "control = submission" modifier to ACLs.
1614 27. Added the ${base62d: operator to decode base 62 numbers.
1616 28. dnsdb lookups can now access SRV records.
1618 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1619 the configuration file.
1621 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1622 (-v) mode. This makes the output for a verbose queue run more intelligible.
1624 31. Added a use_postmaster feature to recipient callouts.
1626 32. Added the $body_zerocount variable, containing the number of binary zero
1627 bytes in the message body.
1629 33. The time of last modification of the "new" subdirectory is now used as the
1630 "mailbox time last read" when there is a quota error for a maildir
1633 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1635 35. Added +ignore_unknown as a special item in host lists.
1637 36. Code for decoding IPv6 addresses in host lists is now included, even if
1638 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1639 address was recognized as an IP address, but was then not correctly decoded
1640 into binary, causing unexpected and incorrect effects when compared with
1647 1. Very minor rewording of debugging text in manualroute to say "list of
1648 hosts" instead of "hostlist".
1650 2. If verify=header_syntax was set, and a header line with an unqualified
1651 address (no domain) and a large number of spaces between the end of the
1652 name and the colon was received, the reception process suffered a buffer
1653 overflow, and (when I tested it) crashed. This was caused by some obsolete
1654 code that should have been removed. The fix is to remove it!
1656 3. When running in the test harness, delay a bit after writing a bounce
1657 message to get a bit more predictability in the log output.
1659 4. Added a call to search_tidyup() just before forking a reception process. In
1660 theory, someone could use a lookup in the expansion of smtp_accept_max_
1661 per_host which, without the tidyup, could leave open a database connection.
1663 5. Added the variables $recipient_data and $sender_data which get set from a
1664 lookup success in an ACL "recipients" or "senders" condition, or a router
1665 "senders" option, similar to $domain_data and $local_part_data.
1667 6. Moved the writing of debug_print from before to after the "senders" test
1670 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1671 problems for message scanning, either using a data ACL, or using
1672 local_scan() because the Received: header was not generated till after they
1673 were called (in order to set the time as the time of reception completion).
1674 I have revised the way this works. The header is now generated after the
1675 body is received, but before the ACL or local_scan() are called. After they
1676 are run, the timestamp in the header is updated.
1682 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1683 before starting a queue runner without re-exec. This happened only when
1684 deliver_drop_privilege was set or when the Exim user was set to root. The
1685 effect of the bug was that timeouts during subsequent deliveries caused
1686 crashes instead of being properly handled. The handler is now left at its
1687 default (and expected) setting.
1689 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1690 message, again when deliver_drop_privilege is set or Exim is run as root.
1691 The bug described in (1) was not present in this case, but the tidying up
1692 of the other signals was missing. I have made the two cases consistent.
1694 3. The ignore_target_hosts setting on a manualroute router was being ignored
1695 for hosts that were looked up using the /MX notation.
1697 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1700 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1701 operated on the sender address. After changing the $sender_address to <>
1702 for the sender address verify, Exim was re-instated it as the original
1703 (before rewriting) address, but remembering that it had rewritten it, so it
1704 wasn't rewriting it again. This bug also had the effect of breaking the
1705 sender address verification caching when the sender address was rewritten.
1707 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1708 This has been changed so that if the ip literal address matches
1709 ignore_target_hosts, the router declines.
1711 7. Added expansion conditions match_domain, match_address, and match_local_
1712 part (NOT match_host).
1714 8. The placeholder for the Received: header didn't have a length field set.
1716 9. Added code to Exim itself and to exim_lock to test for a specific race
1717 condition that could lead to file corruption when using MBX delivery. The
1718 issue is with the lockfile that is created in /tmp. If this file is removed
1719 after a process has opened it but before that process has acquired a lock,
1720 there is the potential for a second process to recreate the file and also
1721 acquire a lock. This could lead to two Exim processes writing to the file
1722 at the same time. The added code performs the same test as UW imapd; it
1723 checks after acquiring the lock that its file descriptor still refers to
1724 the same named file.
1726 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1727 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1730 11. Added the smtp_active_hostname option. If used, this will typically be made
1731 to depend on the incoming interface address. Because $interface_address is
1732 not set up until the daemon has forked a reception process, error responses
1733 that can happen earlier (such as "too many connections") no longer contain
1736 12. If an expansion in a condition on a "warn" statement fails because a lookup
1737 defers, the "warn" statement is abandoned, and the next ACL statement is
1738 processed. Previously this caused the whole ACL to be aborted.
1740 13. Added the iplsearch lookup type.
1742 14. Added ident_timeout as a log selector.
1744 15. Added tls_certificate_verified as a log selector.
1746 16. Added a global option tls_require_ciphers (compare the smtp transport
1747 option of the same name). This controls incoming TLS connections.
1749 17. I finally figured out how to make tls_require_ciphers do a similar thing
1750 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1751 before starting the TLS session.
1753 18. Tabs are now shown as \t in -bP output.
1755 19. If the log selector return_path_on_delivery was set, Exim crashed when
1756 bouncing a message because it had too many Received: header lines.
1758 20. If two routers both had headers_remove settings, and the first one included
1759 a superfluous trailing colon, the final name in the first list and the
1760 first name in the second list were incorrectly joined into one item (with a
1761 colon in the middle).
1767 1. Added -C and -D options to the exinext utility, mainly to make it easier
1768 to include in the automated testing, but these could be helpful when
1769 multiple configurations are in use.
1771 2. The exinext utility was not formatting the output nicely when there was
1772 an alternate port involved in the retry record key, nor when there was a
1773 message id as well (for retries that were specific to a specific message
1774 and a specific host). It was also confused by IPv6 addresses, because of
1775 the additional colons they contain. I have fixed the IPv4 problem, and
1776 patched it up to do a reasonable job for IPv6.
1778 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1779 delivery, the log line now contains "pipelined" if PIPELINING was used.
1781 4. An SMTP transport process used to panic and die if the bind() call to set
1782 an explicit outgoing interface failed. This has been changed; it is now
1783 treated in the same way as a connect() failure.
1785 5. A reference to $sender_host_name in the part of a conditional expansion
1786 that was being skipped was still causing a DNS lookup. This no longer
1789 6. The def: expansion condition was not recognizing references to header lines
1790 that used bh_ and bheader_.
1792 7. Added the _cache feature to named lists.
1794 8. The code for checking quota_filecount in the appendfile transport was
1795 allowing one more file than it should have been.
1797 9. For compatibility with Sendmail, the command line option
1805 and sets the incoming protocol and host name (for trusted callers). The
1806 host name and its colon can be omitted when only the protocol is to be set.
1807 Note the Exim already has two private options, -pd and -ps, that refer to
1808 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1809 "s", but I don't think that's a major issue.
1811 10. A number of refactoring changes to the code, none of which should affect
1814 (a) The number of logging options was getting close to filling up the
1815 32-bit word that was used as a bit map. I have split them into two classes:
1816 those that are passed in the argument to log_write(), and those that are
1817 only ever tested independently outside of that function. These are now in
1818 separate 32-bit words, so there is plenty of room for expansion again.
1819 There is no change in the user interface or the logging behaviour.
1821 (b) When building, for example, log lines, the code previously used a
1822 macro that called string_cat() twice, in order to add two strings. This is
1823 not really sufficiently general. Furthermore, there was one instance where
1824 it was actually wrong because one of the argument was used twice, and in
1825 one call a function was used. (As it happened, calling the function twice
1826 did not affect the overall behaviour.) The macro has been replaced by a
1827 function that can join an arbitrary number of extra strings onto a growing
1830 (c) The code for expansion conditions now uses a table and a binary chop
1831 instead of a serial search (which was left over from when there were very
1832 few conditions). Also, it now recognizes conditions like "pam" even when
1833 the relevant support is not compiled in: a suitably worded error message is
1834 given if an attempt is made to use such a condition.
1836 11. Added ${time_interval:xxxxx}.
1838 12. A bug was causing one of the ddress fields not to be passed back correctly
1839 from remote delivery subprocesses. The field in question was not being
1840 subsequently used, so this caused to problems in practice.
1842 13. Added new log selectors queue_time and deliver_time.
1844 14. Might have fixed a bug in maildirsizefile handling that threw up
1845 "unexpected character" debug warnings, and recalculated the data
1846 unnecessarily. In any case, I expanded the warning message to give more
1849 15. Added the message "Restricted characters in address" to the statements in
1850 the default ACL that block characters like @ and % in local parts.
1852 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
1853 Three changes have been made:
1855 (a) There was a serious bug; a negative response to MAIL caused the whole
1856 recipient domain to be cached as invalid, thereby blocking all messages
1857 to all local parts at the same domain, from all senders. This bug has
1858 been fixed. The domain is no longer cached after a negative response to
1859 MAIL if the sender used is not empty.
1861 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1864 (c) A new callout option, "use_sender" has been added for people who want
1865 the modified behaviour.
1871 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1874 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1875 indeed breaks things for older releases.
1877 3. Added additional logging to the case where there is a problem reading data
1878 from a filter that is running in a subprocess using a pipe, in order to
1879 try to track down a specific problem.
1881 4. Testing facility fudge: when running in the test harness and attempting
1882 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1883 getting "No route to host". Convert this to a timeout.
1885 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1888 6. Some OS don't have socklen_t but use size_t instead. This affects the
1889 fifth argument of getsockopt() amongst other things. This is now
1890 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1891 can be set for individual OS. I have set it for SunOS5, OSF1, and
1892 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1893 some earlier ones do not.
1895 7. Change 4.30/15 was not doing the test caselessly.
1897 8. The standard form for an IPv6 address literal was being rejected by address
1898 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1899 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1900 this, as well as the form without the "IPv6" on the front (but only when
1901 address literals are enabled, of course).
1903 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
1905 10. Exim crashed if a message with an empty sender address specified by -f
1906 encountered a router with an errors_to setting. This could be provoked only
1907 by a command such as
1911 where an empty string was supplied; "<>" did not hit this bug.
1913 11. Installed PCRE release 4.5.
1915 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1916 remained set. It is now erased.
1918 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1919 times from message ids (which are base 36 rather than the normal 62).
1921 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1922 were being counted as actual protocol errors, and logged if the log
1923 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1924 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1925 and DATA following a set of rejected RCPTs do not count as protocol errors.
1926 In other words, Exim assumes they were pipelined, though this may not
1927 actually be the case. Of course, in all cases the client gets an
1928 appropriate error code.
1930 15. If a lookup fails in an ACL condition, a message about the failure may
1931 be available; it is used if testing the ACL cannot continue, because most
1932 such messages specify what the cause of the deferral is. However, some
1933 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1934 that caused an old message to be retained and used if a later statement
1935 caused a defer, replacing the real cause of the deferral.
1937 16. If an IP address had so many PTR records that the DNS lookup buffer
1938 was not large enough to hold them, Exim could crash while trying to process
1939 the truncated data. It now detects and logs this case.
1941 17. Further to 4.21/58, another change has been made: if (and only if) the
1942 first line of a message (the first header line) ends with CRLF, a bare LF
1943 in a subsequent header line has a space inserted after it, so as not to
1944 terminate the header.
1946 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
1947 unnecessarily, used atoi() instead of strtol(), and didn't check the
1948 termination when getting file sizes from file names by regex.
1950 19. Completely re-implemented the support for maildirsize files, in the light
1951 of a number of problems with the previous contributed implementation
1952 (4.30/29). In particular:
1954 . If the quota is zero, the maildirsize file is maintained, but no quota is
1957 . If the maildir directory does not exist, it is created before any attempt
1958 to write a maildirsize file.
1960 . The quota value in the file is just a cache; if the quota is changed in
1961 the transport, the new value overrides.
1963 . A regular expression is available for excluding directories from the
1966 20. The autoreply transport checks the characters in options that define the
1967 message's headers; it allows continued headers, but it was checking with
1968 isspace() after an embedded newline instead of explicitly looking for a
1971 21. If all the "regular" hosts to which an address was routed had passed their
1972 expiry times, and had not reached their retry times, the address was
1973 bounced, even if fallback hosts were defined. Now Exim should go on to try
1976 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1977 equivalent code in the SMTP transport. Some hosts send humungous responses
1978 to HELO/EHLO, more than 1024 it seems.
1980 23. Refactoring: code in filter.c used (void *) for "any old type" but this
1981 gives compiler warnings in some environments. I've now done it "properly",
1984 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1985 (because of problems with the built-in one) was declared to return uschar *
1986 instead of char *, causing compiler failure.
1988 25. Fixed a file descriptor leak when processing alias/forward files.
1990 26. Fixed a minor format string issue in dbfn.c.
1992 27. Typo in exim.c: ("dmbnz" for "dbmnz").
1994 28. If a filter file refered to $h_xxx or $message_headers, and the headers
1995 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1998 29. When a sender address is verified, it is cached, to save repeating the test
1999 when there is more than one recipient in a message. However, when the
2000 verification involves a callout, it is possible for different callout
2001 options to be set for different recipients. It is too complicated to keep
2002 track of this in the cache, so now Exim always runs a verification when a
2003 callout is required, relying on the callout cache for the optimization.
2004 The overhead is duplication of the address routing, but this should not be
2007 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
2008 to be verified with callout=postmaster, and the main callout worked but the
2009 postmaster check failed, the verification correctly failed. However, if a
2010 subsequent RCPT command asked for sender verification *without* the
2011 postmaster check, incorrect caching caused this verification also to fail,
2014 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2015 it was not caching the DNS options (qualify_single, search_parents) that
2016 were used when the lookup failed. A subsequent lookup with different
2017 options therefore always gave the same answer, though there were cases
2018 where it should not have. (Example: a "domains = !$mx_any" option on a
2019 dnslookup router: the "domains" option is always processed without any
2020 widening, but the router might have qualify_single set.) Now Exim uses the
2021 cached value only when the same options are set.
2023 32. Added John Jetmore's "exipick" utility to the distribution.
2025 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
2026 than a timeout (e.g. a certificate is required, and is not provided), an
2027 Exim server now closes the connection immediately. Previously it waited for
2028 the client to close - but if the client is SSL, it seems that they each
2029 wait for each other, leading to a delay before one of them times out.
2031 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2032 maintained 0.8.x compatibility because I don't think many are using it, and
2033 it is clearly obsolete.
2035 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2038 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2039 client certificate was expired. A simple patch fixes this, though I don't
2040 understand the full logic of why the verify callback is called multiple
2043 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2044 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2045 which causes problems with some clients (such as the Certicom SSL Plus
2046 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2047 disables the coutermeasure allowing Eudora to connect."
2049 38. Exim was not checking that a write() to a log file succeeded. This could
2050 lead to Bad Things if a log got too big, in particular if it hit a file
2051 size limit. Exim now panics and dies if it cannot write to a log file, just
2052 as it does if it cannot open a log file.
2054 39. Modified OS/Makefile-Linux so that it now contains
2056 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
2058 The two -D definitions ensure that Exim is compiled with large file
2059 support, which makes it possible to handle log files that are bigger than
2062 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2063 instance) a domain was checked against a named list that involved a lookup,
2064 causing $domain_data to be set, then another domain was checked against the
2065 same list, then the first domain was re-checked, the value of $domain_data
2066 after the final check could be wrong. In particular, if the second check
2067 failed, it could be set empty. This bug probably also applied to
2070 41. The strip_trailing_dot option was not being applied to the address given
2071 with the -f command-line option.
2073 42. The code for reading a message's header from the spool was incrementing
2074 $received_count, but never initializing it. This meant that the value was
2075 incorrect (doubled) while delivering a message in the same process in which
2076 it was received. In the most common configuration of Exim, this never
2077 happens - a fresh exec is done - but it can happen when
2078 deliver_drop_privilege is set.
2080 43. When Exim logs an SMTP synchronization error - client data sent too soon -
2081 it now includes up to 150 characters of the unexpected data in the log
2084 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2085 and building data strings. The size of both of these buffers was 10 000
2086 bytes - far larger than anybody would *ever* want, thought I. Needless to
2087 say, somebody hit the limit. I have increased the maximum line length to
2088 20 000 and the maximum data length of concatenated lines to 100 000. I have
2089 also fixed two bugs, because there was no checking on these buffers. Tsk,
2090 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2091 buffer is too small.
2093 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2094 lsearch lookups. Now it does.
2096 46. When parsing a route_list item in a manualroute router, a fixed-length
2097 buffer was used for the list of hosts. I made this 1024 bytes long,
2098 thinking that nobody would ever have a list of hosts that long. Wrong.
2099 Somebody had a whole pile of complicated expansion conditions, and the
2100 string was silently truncated, leading to an expansion error. It turns out
2101 that it is easier to change to an unlimited length (owing to other changes
2102 that have happened since this code was originally written) than to build
2103 structure for giving a limitation error. The length of the item that
2104 expands into the list of hosts is now unlimited.
2106 47. The lsearch lookup could not handle data where the length of text line was
2107 more than 4095 characters. Such lines were truncated, leading to shortened
2108 data being returned. It should now handle lines of any length.
2110 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2111 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2114 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
2115 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2116 no longer happens in comment lines. A list of replacements is now placed
2117 at the head of all of the source files, except those whose only change is
2118 to replace PERL_COMMAND in the very first #! line.
2120 50. Replaced the slow insertion sort in queue.c, for sorting the list of
2121 messages on the queue, with a bottom-up merge sort, using code contributed
2122 by Michael Haardt. This should make operations like -bp somewhat faster on
2123 large queues. It won't affect queue runners, except when queue_run_in_order
2126 51. Installed eximstats 1.31 in the distribution.
2128 52. Added support for SRV lookups to the dnslookup router.
2130 53. If an ACL referred to $message_body or $message_body_end, the value was not
2131 reset for any messages that followed in the same SMTP session.
2133 54. The store-handling optimization for building very long strings was not
2134 differentiating between the different store pools. I don't think this
2135 actually made any difference in practice, but I've tidied it.
2137 55. While running the routers to verify a sender address, $sender_address
2138 was still set to the sender address. This is wrong, because when routing to
2139 send a bounce to the sender, it would be empty. Therefore, I have changed
2140 it so that, while verifying a sender address, $sender_address is set to <>.
2141 (There is no change to what happens when verifying a recipient address.)
2143 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2144 target A or AAAA records (if not already returned) without resetting the
2145 qualify_single or search_parents options of the DNS resolver. These are
2146 inappropriate in this case because the targets of MX and SRV records must
2147 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2148 target that, when qualified, matched something in the local domain. These
2149 two options are now turned off when doing these lookups.
2151 57. It seems that at least some releases of Reiserfs (which does not have the
2152 concept of a fixed number of inodes) returns zero and not -1 for the
2153 number of available inodes. This interacted badly with check_spool_inodes,
2154 which assumed that -1 was the "no such thing" setting. What I have done is
2155 to check that the total number of inodes is greater than zero before doing
2156 the test of how many are available.
2158 58. When a "warn" ACL statement has a log_message modifier, the message is
2159 remembered, and not repeated. This is to avoid a lot of repetition when a
2160 message has many recipients that cause the same warning to be written.
2161 Howewer, Exim was preserving the list of already written lines for an
2162 entire SMTP session, which doesn't seem right. The memory is now reset if a
2163 new message is started.
2165 59. The "rewrite" debugging flag was not showing the result of rewriting in the
2166 debugging output unless log_rewrite was also set.
2168 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2169 of (int)(handle) when we know that handle contains (void *)(-1).
2171 61. The Exim daemon panic-logs an error return when it closes the incoming
2172 connection. However "connection reset by peer" seems to be common, and
2173 isn't really an error worthy of noting specially, so that particular error
2176 62. When Exim is trying to find all the local interfaces, it used to panic and
2177 die if the ioctl to get the interface flags failed. However, it seems that
2178 on at least one OS (Solaris 9) it is possible to have an interface that is
2179 included in the list of interfaces, but for which you get a failure error
2180 for this call. This happens when the interface is not "plumbed" into a
2181 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2182 failure of the "get flags" call assumes that the interface is down.
2184 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
2185 makes life easier for people who are doing arithmetic on fields extracted
2186 from dates, where you often get leading zeros that should not be
2187 interpreted as octal.
2189 64. Added qualify_domain to the redirect router, to override the global
2192 65. If a pathologically long header line contained very many addresses (the
2193 report of this problem mentioned 10 000) and each of them was rewritten,
2194 Exim could use up a very large amount of memory. (It kept on making new
2195 copies of the header line as it rewrote, and never released the old ones.)
2196 At the expense of a bit more processing, the header rewriting function has
2197 been changed so that it no longer eats memory in this way.
2199 66. The generation of the Received: header has been moved from the time that a
2200 message starts to be received, to the time that it finishes. The timestamp
2201 in the Received: header should now be very close to that of the <= log
2202 line. There are two side-effects of this change:
2204 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2205 logged header lines no longer include the local Received: line, because
2206 it has not yet been created. The same applies to a copy of the message
2207 that is returned to a non-SMTP sender when a message is rejected.
2209 (b) When a filter file is tested using -bf, no additional Received: header
2210 is added to the test message. After some thought, I decided that this
2213 This change does not affect the value of $received_for. It is still set
2214 after address rewriting, but before local_scan() is called.
2216 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2218 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2219 gave an unhelpful panic error message, and a defer error. I have managed to
2220 change this behaviour so that it now rejects any supplied certificate,
2221 which seems right, as the list of acceptable certificates is empty.
2223 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2224 gave an unhelpful defer error. I have not managed to make this reject any
2225 supplied certificates, but the error message it gives is "no certificate
2226 supplied", which is not helpful.
2228 70. exigrep's output now also includes lines that are not associated with any
2229 message, but which match the given pattern. Implemented by a patch from
2230 Martin Sluka, which also tidied up the Perl a bit.
2232 71. Recipient callout verification, like sender verification, was using <> in
2233 the MAIL FROM command. This isn't really the right thing, since the actual
2234 sender may affect whether the remote host accepts the recipient or not. I
2235 have changed it to use the actual sender in the callout; this means that
2236 the cache record is now keyed on a recipient/sender pair, not just the
2237 recipient address. There doesn't seem to be a real danger of callout loops,
2238 since a callout by the remote host to check the sender would use <>.
2239 [SEE ABOVE: changed after hitting problems.]
2241 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2242 temporary errors. However, in the case of such a code being given after
2243 the end of a data transmission (i.e. after ".") Exim was failing to write
2244 a retry record for the message. (Yes, there was some broken host that was
2245 actually sending 8xx at this point.)
2247 73. An unknown lookup type in a host list could cause Exim to panic-die when
2248 the list was checked. (An example that provoked this was putting <; in the
2249 middle of a list instead of at the start.) If this happened during a DATA
2250 ACL check, a -D file could be left lying around. This kind of configuration
2251 error no longer causes Exim to die; instead it causes a defer errror. The
2252 incident is still logged to the main and panic logs.
2254 74. Buglet left over from Exim 3 conversion. The message "too many messages
2255 in one connection" was written to the rejectlog but not the mainlog, except
2256 when address rewriting (yes!) was being logged.
2258 75. Added write_rejectlog option.
2260 76. When a system filter was run not as root (that is, when system_filter_user
2261 was set), the values of the $n variables were not being returned to the
2262 main process; thus, they were not subsequently available in the $sn
2265 77. Added +return_path_on_delivery log selector.
2267 78. A connection timeout was being treated differently from recipients deferred
2268 when testing hosts_max_try with a message that was older than the host's
2269 retry timeout. (The host should not be counted, thus allowing all hosts to
2270 be tried at least once before bouncing.) This may have been the cause of an
2271 occasionally reported bug whereby a message would remain on the queue
2272 longer than the retry timeout, but would be bounced if a delivery was
2273 forced. I say "may" because I never totally pinned down the problem;
2274 setting up timeout/retry tests is difficult. See also the next item.
2276 79. The ultimate address timeout was not being applied to errors that involved
2277 a combination of host plus message (for example, a timeout on a MAIL
2278 command). When an address resolved to a number of possible hosts, and they
2279 were not all tried for each delivery (e.g. because of hosts_max_try), a
2280 message could remain on the queue longer than the retry timeout.
2282 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2285 81. Fixed an obscure SMTP outgoing bug which required at least the following
2286 conditions: (a) there was another message waiting for the same server;
2287 (b) the server returned 5xx to all RCPT commands in the first message so
2288 that the message was not completed; (c) the server dropped the connection
2289 or gave a negative response to the RSET that Exim sends to abort the
2290 transaction. The observed case was a dropped connection after DATA that had
2291 been sent in pipelining mode. That is, the server had advertised PIPELINING
2292 but was not implementing it correctly. The effect of the bug was incorrect
2293 behaviour, such as trying another host, and this could lead to a crash.
2299 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2300 and daemon.c were passed as pointers to ints; they should have been
2301 pointers to socklen_t variables (which are typically unsigned ints).
2303 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2306 3. Fixed a really odd bug that affected only the testing scheme; patching a
2307 certain fixed string in the binary changed the value of another string that
2308 happened to be identical to the end of the original first string.
2310 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2311 name", it returns that address as the IP address. On some operating
2312 systems (e.g. Solaris), it also passes back the IP address string as the
2313 "host name". However, on others (e.g. Linux), it passes back an empty
2314 string. Exim wasn't checking for this, and was changing the host name to an
2315 empty string, assuming it had been canonicized.
2317 5. Although rare, it is permitted to have more than one PTR record for a given
2318 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2319 all the names associated with an address, because they do in Solaris.
2320 However, it seems that they do not in Linux for data that comes from the
2321 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2322 I found this out when I moved to a new Linux workstation and tried to run
2323 the Exim test suite.
2325 To get round this problem I have changed the code so that it now does its
2326 own call to the DNS to look up PTR records when searching for a host name.
2327 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2328 addresses that are only in /etc/hosts are still found.
2330 This behaviour is, however, controlled by an option called host_lookup_
2331 order, which defaults to "bydns:byaddr". If people want to use the other
2332 order, or indeed, just use one or the other means of lookup, they can
2333 specify it in this variable.
2335 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2336 some operating systems, this comes back from gethostbyaddr() as an empty
2337 string, and this is what Exim used to test for. However, it seems that in
2338 other systems, "." is yielded. Exim now tests for this case too.
2340 7. The values of check_spool_space and check_log_space are now held internally
2341 as a number of kilobytes instead of an absolute number of bytes. If a
2342 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2343 kilobyte. This means that much larger values can be stored.
2345 8. Exim monitor: an attempt to get the action menu when not actually pointing
2346 at a message produces an empty menu entitled "No message selected". This
2347 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2348 no entries in it ("Shell widget menu has zero width and/or height"). So I
2349 have added a single, blank menu entry in this case.
2351 9. Added ${quote_local_part.
2353 10. MIME decoding is now applied to the contents of Subject: header lines when
2356 11. Now that a reference to $sender_host_address automatically causes a reverse
2357 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2358 host lookup before query-style lookups in lists that might use this
2359 variable. This has therefore been abolished, and the "net-" prefix is no
2360 longer necessary for query-style lookups.
2362 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2363 have been a typo for LFLAGS, so it has been changed.
2365 13. The install script calls Exim with "-C /dev/null" in order to find the
2366 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2367 to be output. Howeve, since Exim outputs its version number before the
2368 error, it didn't break the script. It just looked ugly. I fixed this by
2369 always allowing "-C /dev/null" if the caller is root.
2371 14. Ignore overlarge ACL variable number when reading spool file - insurance
2372 against a later release with more variables having written the file.
2374 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2375 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2376 this, as well as the form without the "IPv6" on the front.
2378 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2379 OS/Makefile-Darwin file.
2381 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2382 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2384 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2385 variable. However, some OS use ints for inodes. I've added cast to long int
2386 to get rid of the compiler warning.
2388 19. I had forgotten to lock out "/../" in configuration file names when
2389 ALT_CONFIG_PREFIX was set.
2391 20. Routers used for verification do not need to specify transports. However,
2392 if such a router generated a host list, and callout was configured, Exim
2393 crashed, because it could not find a port number from the (non-existent)
2394 transport. It now assumes port 25 in this circumstance.
2396 21. Added the -t option to exigrep.
2398 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2399 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2400 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2401 them is set, LOOKUP_LSEARCH is forced.
2403 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2405 24. Added sender and host information to the "rejected by local_scan()" log
2406 line; previously there was no indication of these.
2408 25. Added .include_if_exists.
2410 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2411 Linux. It turns out that not all file systems support this. Apparently some
2412 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2413 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2414 not supported on the file descriptor, is now ignored when Exim is trying to
2415 sync a directory. This applies only to Linux.
2417 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2419 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2420 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2423 29. Added support for maildirsize files from supplied patch (modified a bit).
2425 30. The use of :fail: followed by an empty string could lead Exim to respond to
2426 sender verification failures with (e.g.):
2428 550 Verification failed for <xxx>
2429 550 Sender verify failed
2431 where the first response line was missing the '-' that indicates it is not
2432 the final line of the response.
2434 31. The loop for finding the name of the user that called Exim had a hardwired
2435 limit of 10; it now uses the value of finduser_retries, which is used for
2436 all other user lookups.
2438 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2441 33. Exim was neglecting to zero errno before one call of strtol() when
2442 expanding a string and expecting an integer value. On some systems this
2443 resulted in spurious "integer overflow" errors. Also, it was casting the
2444 result into an int without checking.
2446 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2447 did not work. The code looks as if it has *never* worked, though it appears
2448 to have been documented since at least releast 1.62. I have made it work.
2450 35. The "timeout_DNS" error in retry rules, also documented since at least
2451 1.62, also never worked. As it isn't clear exactly what this means, and
2452 clearly it isn't a major issue, I have abolished the feature by treating it
2453 as "timeout", and writing a warning to the main and panic logs.
2455 36. The display of retry rules for -brt wasn't always showing the error code
2458 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2459 timeout_connect_A, timeout_connect_MX.
2461 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2462 to the empty sender.
2464 39. The daemon was not analysing the content of -oX till after it had closed
2465 stderr and disconnected from the controlling terminal. This meant that any
2466 syntax errors were only noted on the panic log, and the return code from
2467 the command was 0. By re-arranging the code a little, I've made the
2468 decoding happen first, so such errors now appear on stderr, and the return
2469 code is 1. However, the actual setting up of the sockets still happens in
2470 the disconnected process, so errors there are still only recorded on the
2473 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2474 connections (as happens on some IP stacks) was logged at start up time as
2475 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2476 it from "IPv6 and IPv4", which means that two separate sockets are being
2479 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2480 says whether AF_INET or AF_INET6 was passed as an argument.
2482 42. Exiwhat output was messed up when time zones were included in log
2485 43. Exiwhat now gives more information about the daemon's listening ports,
2486 and whether -tls-on-connect was used.
2488 44. The "port" option of the smtp transport is now expanded.
2490 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2491 silently ignored. Now an error message is written to the main and panic
2494 46. There's a new ACL modifier called "logwrite" which writes to a log file
2495 as soon as it is encountered.
2497 47. Added $local_user_uid and $local_user_gid at routing time.
2499 48. Exim crashed when trying to verify a sender address that was being
2502 49. Exim was recognizing only a space character after ".include". It now also
2503 recognizes a tab character.
2505 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2506 extracting the relevant information from the specification. The man page no
2507 longer contains scrambled data for the -d option, and I've added a section
2508 at the front about calling Exim under different names.
2510 51. Added "extra_headers" argument to the "mail" command in filter files.
2512 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2515 53. Installed eximstats 1.29.
2517 54. Added transport_filter_timeout as a generic transport option.
2519 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2520 Cc: header lines. This was required by RFC 822, but it not required by RFC
2523 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2524 incoming messages that did not have them. Now it does so only if the
2525 message originates locally, that is, if there is no associated remote host
2526 address. When Resent- header lines are present, this applies to the Resent-
2527 lines rather than the non-Resent- lines.
2529 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2530 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2532 58. Messages for configuration errors now include the name of the main
2533 configuration file - useful now that there may be more than one file in a
2534 list (.included file names were always shown).
2536 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2537 for those rare installations that do not start the daemon as root or run it
2538 setuid root. I've cut out the call to initgroups() if the daemon is not
2541 60. The Exim user and group can now be bound into the binary as text strings
2542 that are looked up at the start of Exim's processing.
2544 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2546 62. Added $mailstore_basename variable.
2548 63. Installed patch to sieve.c from Michael Haardt.
2550 64. When Exim failed to open the panic log after failing to open the main log,
2551 the original message it was trying to log was written to stderr and debug
2552 output, but if they were not available (the usual case in production), it
2553 was lost. Now it is written to syslog before the two lines that record the
2554 failures to open the logs.
2556 65. Users' Exim filters run in subprocesses under the user's uid. It is
2557 possible for a "deliver" command or an alias in a "personal" command to
2558 provoke an address rewrite. If logging of address rewriting is configured,
2559 this fails because the process is not running as root or exim. There may be
2560 a better way of dealing with this, but for the moment (because 4.30 needs
2561 to be released), I have disabled address rewrite logging when running a
2562 filter in a non-root, non-exim process.
2568 1. The buildconfig auxiliary program wasn't quoting the value set for
2569 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2570 not defined. This bug was masked in 4.22 by the effect that was fixed in
2573 2. Some messages that were rejected after a message id was allocated were
2574 shown as "incomplete" by exigrep. It no longer does this for messages that
2575 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2577 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2578 have allow_domain_literals set, the ID did not get logged in the <= line.
2579 Domain literals are now always recognized in Message-ID: header lines.
2581 4. The first argument for a ${extract expansion item is the key name or field
2582 number. Leading and trailing spaces in this item were not being ignored,
2583 causing some misleading effects.
2585 5. When deliver_drop_privilege was set, single queue runner processes started
2586 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2587 same command in the process it spins off) were not dropping privilege.
2589 6. When the daemon running as "exim" started a queue runner, it always
2590 re-executed Exim in the spun-off process. This is a waste of effort when
2591 deliver_drop_privilege is set. The new process now just calls the
2592 queue-runner function directly.
2598 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2601 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2602 ignored. Though the use of -oP was forcing the writing of a pid file, it
2603 was always written to the default place.
2605 3. If the message "no IP address found for host xxxx" is generated during
2606 incoming verification, it is now followed by identification of the incoming
2607 connection (so you can more easily find what provoked it).
2609 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2611 5. Added some features to "harden" Exim a bit more against certain attacks:
2613 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2614 be put in Local/Makefile. This is like the never_users runtime option,
2615 but it cannot be overridden. The default setting is "root".
2617 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2618 prefix string with which any file named in a -C command line option
2621 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2622 is retained for -C and -D only if the caller of Exim is root. Without
2623 it, the exim user may also use -C and -D and retain privilege.
2625 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2626 command line option is disabled.
2628 6. Macro names set by the -D option must start with an upper case letter, just
2629 like macro names defined in the configuration file.
2631 7. Added "dereference=" facility to LDAP.
2633 8. Two instances of the typo "uknown" in the source files are fixed.
2635 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2636 the Configure-Makefile script screwed up while processing it.
2638 10. Incorporated PCRE 4.4.
2640 11. The SMTP synchronization check was not operating right at the start of an
2641 SMTP session. For example, it could not catch a HELO sent before the client
2642 waited for the greeting. There is now a check for outstanding input at the
2643 point when the greeting is written. Because of the duplex, asynchronous
2644 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2645 way, but not yet received, when the check is performed.
2647 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2648 on TCP/IP sockets, because this apparently causes some broken clients to
2651 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2652 unchanged) from the Cygwin maintainer.
2654 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2655 was supported instead of testing for mbx. Effectively a typo.
2657 15. The spa authenticator server code was not checking that the input it
2658 received was valid base64.
2660 16. The debug output line for the "set" modifier in ACLs was not showing the
2661 name of the variable that was being set.
2663 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2665 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2666 lookup on its own. Something else was needed to trigger the lookup. For
2667 example, a match in host_lookup or the need for a host name in a host list.
2668 Now, if $sender_host_name is referenced and the host name has not yet been
2669 looked up, a lookup is performed. If the lookup fails, the variable remains
2670 empty, and $host_lookup_failed is set to "1".
2672 19. Added "eqi" as a case-independent comparison operator.
2674 20. The saslauthd authentication condition could segfault if neither service
2675 nor realm was specified.
2677 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2678 error message that was logged was misleading, and incoming SMTP
2679 connections were dropped. The message is now more accurate, and temporary
2680 errors are given to SMTP connections.
2682 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2683 (except RSET) with a 421 error, until QUIT is received. However, it was
2684 failing to send a response to QUIT.
2686 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2687 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2688 ACL is now run after the helo_try_verify_hosts code.
2690 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2691 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2692 case-independent, so other case variants are also recognized). Apparently
2693 some systems use these upper case variants.
2695 25. If more than two messages were waiting for the same host, and a transport
2696 filter was specified for the transport, Exim sent two messages over the
2697 same TCP/IP connection, and then failed with "socket operation on non-
2698 socket" when it tried to send the third.
2700 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2702 27. The extern definition of crypt16() in expand.c was not being excluded when
2703 the OS had its own crypt16() function.
2705 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2706 as a preferred synonym for return_size_limit, both as an option and as an
2709 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2711 30. Changed the default configuration ACL to relax the local part checking rule
2712 for addresses that are not in any local domains. For these addresses,
2713 slashes and pipe symbols are allowed within local parts, but the sequence
2714 /../ is explicitly forbidden.
2716 31. SPA server authentication was not clearing the challenge buffer before
2719 32. log_message in a "warn" ACL statement was writing to the reject log as
2720 well as to the main log, which contradicts the documentation and doesn't
2721 seem right (because no rejection is happening). So I have stopped it.
2723 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2724 However, I am unable to do any testing of this.
2726 34. Fixed an infelicity in the appendfile transport. When checking directories
2727 for a mailbox, to see if any needed to be created, it was accidentally
2728 using path names with one or more superfluous leading slashes; tracing
2729 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2731 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2732 contents are added to the log line that is written for every discarded
2733 recipient. (Previously a log_message setting was ignored.)
2735 36. The ${quote: operator now quotes the string if it is empty.
2737 37. The install script runs exim in order to find its version number. If for
2738 some reason other than non-existence or emptiness, which it checks, it
2739 could not run './exim', it was installing it with an empty version number,
2740 i.e. as "exim-". This error state is now caught, and the installation is
2743 38. An argument was missing from the function that creates an error message
2744 when Exim fails to connect to the socket for saslauthd authentication.
2745 This could cause Exim to crash, or give a corrupted message.
2747 39. Added isip, isip4, and isip6 to ${if conditions.
2749 40. The ACL variables $acl_xx are now saved with the message, and can be
2750 accessed later in routers, transports, and filters.
2752 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2753 strings in the file are not string-expanded.
2755 42. If a MAIL command specified a SIZE value that was too large to fit into an
2756 int variable, the check against message_size_limit failed. Such values are
2757 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2758 day this will have to be increased, but I don't think I want to be around
2759 when emails are that large.
2766 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2767 iconv() is not standard in FreeBSD.
2769 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2770 IPv6 enabled. The observed symptom was a segmentation fault on return from
2771 the function os_common_find_running_interfaces() in src/os.c.
2773 3. In the check_special_case() function in daemon.c I had used "errno" as an
2774 argument name, which causes warnings on some systems. This was basically a
2775 typo, since it was named "eno" in the comments!
2777 4. The code that waits for the clock to tick (at a resolution of some fraction
2778 of a second) so as to ensure message-id uniqueness was always waiting for
2779 at least one whole tick, when it could have waited for less. [This is
2780 almost certainly not relevant at current processor speeds, where it is
2781 unlikely to ever wait at all. But we try to future-proof.]
2783 5. The function that sleeps for a time interval that includes fractions of a
2784 second contained a race. It did not block SIGALRM between setting the
2785 timer, and suspending (a couple of lines later). If the interval was short
2786 and the sigsuspend() was delayed until after it had expired, the suspension
2787 never ended. On busy systems this could lead to processes getting stuck for
2790 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2791 process, before it forks any delivery processes. The open lookup caching
2792 mechanism meant that the open file or database connection was passed into
2793 the delivery process. The problem was that delivery processes always tidy
2794 up cached lookup data. This could cause a problem for the next delivery
2795 process started by the queue runner, because the external queue runner
2796 process does not know about the closure. So the next delivery process
2797 still has data in the lookup cache. In the case of a file lookup, there was
2798 no problem because closing a file descriptor in a subprocess doesn't affect
2799 the parent. However, if the lookup was caching a connection to a database,
2800 the connection was closed, and the second delivery process was likely to
2801 see errors such as "PGSQL: query failed: server closed the connection
2802 unexpectedly". The problem has been fixed by closing all cached lookups
2803 in a queue runner before running a delivery process.
2805 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2806 seem to have the "const" qualifier which it has on other OS. I've
2809 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2810 *of the same type* (client or server) with the same public name that an
2811 error should be diagnosed.
2813 9. When Exim looked up a host name for an IP address, but failed to find the
2814 original IP address when looking up the host name (a safety check), it
2815 output the message "<ip address> does not match any IP for NULL", which was
2816 confusing, to say the least. The bug was that the host name should have
2817 appeared instead of "NULL".
2819 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
2820 user that is built into the binary, and the -C or -D options is used, root
2821 privilege is dropped before the configuration file is read. In addition,
2822 logging is switched to stderr instead of the normal log files. If the
2823 configuration then re-defines the Exim user, the unprivileged environment
2824 is probably not what is expected, so Exim logs a panic warning message (but
2827 However, if deliver_drop_privilege is set, the unprivileged state may well
2828 be exactly what is intended, so the warning has been cut out in that case,
2829 and Exim is allowed to try to write to its normal log files.
2835 1. smtp_return_error_details was not giving details for temporary sender
2836 or receiver verification errors.
2838 2. Diagnose a configuration error if two authenticators have the same public
2841 3. Exim used not to create the message log file for a message until the first
2842 delivery attempt. This could be confusing when incoming messages were held
2843 for policy or load reasons. The message log file is now created at the time
2844 the message is received, and an initial "Received" line is written to it.
2846 4. The automatically generated man page for command line options had a minor
2847 bug that caused no ill effects; however, a more serious problem was that
2848 the procedure for building the man page automatically didn't always
2849 operate. Consequently, release 4.20 contains an out-of-date version. This
2850 shouldn't happen again.
2852 5. When building Exim with embedded Perl support, the script that builds the
2853 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2854 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2856 6. The freeze_tell option was not being used for messages that were frozen on
2857 arrival, either by an ACL or by local_scan().
2859 7. Added the smtp_incomplete_transaction log selector.
2861 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2862 was accepting AUTH without a new EHLO.
2864 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2865 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2868 10. Logging of TCP/IP connections (when configured) now happens in the main
2869 daemon process instead of the child process, so that the TCP/IP connection
2870 count is more accurate (but it can never be perfect).
2872 11. The use of "drop" in a nested ACL was not being handled correctly in the
2873 outer ACL. Now, if condition failure induced by the nested "drop" causes
2874 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2875 or "require"), the connection is dropped.
2877 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2878 that yield "discard" can now be used with an "accept" or a "discard" verb,
2879 but an error is generated for any others (because I can't see a useful way
2880 to define what should happen).
2882 13. When an ACL is read dynamically from a file (or anywhere else), the lines
2883 are now processed in the same way as lines in the Exim configuration file.
2884 In particular, continuation lines are supported.
2886 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2888 15. Added -ti meaning -t -i.
2890 16. Check for letters, digits, hyphens, and dots in the names of dnslist
2891 domains, and warn by logging if others are found.
2893 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
2894 returned from GIFCONF when Exim is trying to find the list of interfaces on
2895 a host. The code in os.c has been modified to copy each ifreq to an aligned
2896 structure in all cases.
2898 Also, in some cases, the returned ifreq's were being copied to a 'struct
2899 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2900 means the last couple of bytes of an IPv6 address could be chopped if the
2901 ifreq contained only a normal sockaddr (14 bytes storage).
2903 18. Named domain lists were not supported in the hosts_treat_as_local option.
2904 An entry such as +xxxx was not recognized, and was treated as a literal
2907 19. Ensure that header lines added by a DATA ACL are included in the reject log
2908 if the ACL subsequently rejects the message.
2910 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
2911 MD5 (which is deprecated).
2913 21. When testing a filter file using -bf, Exim was writing a message when it
2914 took the sender from a "From " line in the message, but it was not doing so
2915 when it took $return_path from a Return-Path: header line. It now does.
2917 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2918 with a valid header line field name (a series of printing characters
2919 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
2921 23. Changed "disc" in the source to "disk" to conform to the documentation and
2922 the book and for uniformity.
2924 24. Ignore Sendmail's -Ooption=value command line item.
2926 25. When execve() failed while trying to run a command in a pipe transport,
2927 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2928 could be confused with a return value of 69 from the command itself. This
2929 has been changed to 127, the value the shell returns if it is asked to run
2930 a non-existent command. The wording for the related log line suggests a
2931 non-existent command as the problem.
2933 26. If received_header_text expands to an empty string, do not add a Received:
2934 header line to the message. (Well, it adds a token one on the spool, but
2935 marks it "old" so that it doesn't get used or transmitted.)
2937 27. Installed eximstats 1.28 (addition of -nt option).
2939 28. There was no check for failure on the call to getsockname() in the daemon
2940 code. This can fail if there is a shortage of resources on the system, with
2941 ENOMEM, for example. A temporary error is now given on failure.
2943 29. Contrary to the C standard, it seems that in some environments, the
2944 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2945 program. Exim now does this explicitly; it affects the formatting of
2946 timestamps using strftime().
2948 30. If exiqsumm was given junk data, it threw up some uninitialized variable
2949 complaints. I've now initialized all the variables, to avoid this.
2951 32. Header lines added by a system filter were not being "seen" during
2952 transport-time rewrites.
2954 33. The info_callback() function passed to OpenSSL is set up with type void
2955 (*)(SSL *, int, int), as described somewhere. However, when calling the
2956 function (actually a macro) that sets it up, the type void(*)() is
2957 expected. I've put in a cast to prevent warnings from picky compilers.
2959 34. If a DNS black list lookup found a CNAME record, but there were no A
2960 records associated with the domain it pointed at, Exim crashed.
2962 35. If a DNS black list lookup returned more than one A record, Exim ignored
2963 all but the first. It now scans all returned addresses if a particular IP
2964 value is being sought. In this situation, the contents of the
2965 $dnslist_value variable are a list of all the addresses, separated by a
2968 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
2969 to accept a host name and all its aliases if the forward lookup for any of
2970 them yielded the IP address of the incoming connection. Now it accepts only
2971 those names whose forward lookup yields the correct IP address. Any other
2972 names are discarded. This closes a loophole whereby a rogue DNS
2973 administrator could create reverse DNS records to break through a
2974 wildcarded host restriction in an ACL.
2976 37. If a user filter or a system filter that ran in a subprocess used any of
2977 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2978 the wrong values were passed to the pipe command ($thisaddress had the
2979 value of $0, $0 had the value of $1, etc). This bug was introduced by
2980 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
2982 38. Improved the line breaking for long SMTP error messages from ACLs.
2983 Previously, if there was no break point between 40 and 75 characters, Exim
2984 left the rest of the message alone. Two changes have been made: (a) I've
2985 reduced the minimum length to 35 characters; (b) if it can't find a break
2986 point between 35 and 75 characters, it looks ahead and uses the first one
2987 that it finds. This may give the occasional overlong line, but at least the
2988 remaining text gets split now.
2990 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2991 file descriptors might be low, and that setting 1000 would always raise it.
2992 It turns out that in some environments, the limit is already over 1000 and
2993 that lowering it causes trouble. So now Exim takes care not to decrease it.
2995 40. When delivering a message, the value of $return_path is set to $sender_
2996 address at the start of routing (routers may change the value). By an
2997 oversight, this default was not being set up when an address was tested by
2998 -bt or -bv, which affected the outcome if any router or filter referred to
3001 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
3002 log only when "message" or "log_message" are set. However, if one of the
3003 conditions was an address verification, or a call to a nested ACL, the
3004 messages generated by the underlying test were being passed through. This
3005 no longer happens. The underlying message is available in $acl_verify_
3006 message for both "message" and "log_message" expansions, so it can be
3007 passed through if needed.
3009 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3010 new expansion $bh_ to give the encoded byte string without charset
3011 translation. Translation happens only if iconv() is available; HAVE_ICONV
3012 indicates this at build time. HEADERS_CHARSET gives the charset to
3013 translate to; headers_charset can change it in the configuration, and
3014 "headers charset" can change it in an individual filter file.
3016 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
3017 that creates RFC 2047 encoded "words" labels them as that charset instead
3018 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3019 expansion operator; (ii) when Exim creates a From: line for a local
3020 message; (iii) when a header line is rewritten to include a "phrase" part.
3022 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3023 buggy, causing it to skip the first lines of messages whose message ID
3024 ended in 'D'. This would not have bitten before Exim release 4.14, because
3025 message IDs were unlikely to end in 'D' before then. The effect was to have
3026 incorrect size information for certain domains.
3028 45. #include "config.h" was missing at the start of the crypt16.c module. This
3029 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3032 46. If there was a timeout during a "random" callout check, Exim treated it as
3033 a failure of the random address, and carried on sending RSET and the real
3034 address. If the delay was just some slowness somewhere, the response to the
3035 original RCPT would be taken as a response to RSET and so on, causing
3036 mayhem of various kinds.
3038 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3039 when I implemented it. It didn't allow for the fact that some option values
3040 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3041 the right test for positive values.
3043 48. Domain names in DNS records are case-independent. Exim always looks them up
3044 in lower case. Some resolvers return domain names in exactly the case they
3045 appear in the zone file, that is, they may contain uppercase letters. Not
3046 all resolvers do this - some return always lower case. Exim was treating a
3047 change of case by a resolver as a change of domain, similar to a widening
3048 of a domain abbreviation. This triggered its re-routing code and so it was
3049 trying to route what was effectively the same domain again. This normally
3050 caused routing to fail (because the router wouldn't handle the domain
3051 twice). Now Exim checks for this case specially, and just changes the
3052 casing of the domain that it ultimately uses when it transmits the message
3055 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3058 50. If a filter generated a file delivery with a non-absolute name (possible if
3059 no home directory exists for the router), the forbid_file option was not
3062 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
3063 the existing equality matching.
3065 52. Exim was using ints instead of ino_t variables in some places where it was
3066 dealing with inode numbers.
3068 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3069 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3070 called TMPDIR, and if it finds it is different, it changes its value.
3072 54. The smtp_printf() function is now made available to local_scan() so
3073 additional output lines can be written before returning. There is also an
3074 smtp_fflush() function to enable the detection of a dropped connection.
3075 The variables smtp_input and smtp_batched_input are exported to
3078 55. Changed the default runtime configuration: the message "Unknown user"
3079 has been removed from the ACL, and instead placed on the localuser router,
3080 using the cannot_route_message feature. This means that any verification
3081 failures that generate their own messages won't get overridden. Similarly,
3082 the "Unrouteable address" message that was in the ACL for unverifiable
3083 relay addresses has also been removed.
3085 56. Added hosts_avoid_esmtp to the smtp transport.
3087 57. The exicyclog script was not checking for the esoteric option
3088 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3089 will work only if exicyclog is run under the appropriate euid.
3091 58. Following a discussion on the list, the rules by which Exim recognises line
3092 endings on incoming messages have been changed. The -dropcr and drop_cr
3093 options are now no-ops, retained only for backwards compatibility. The
3094 following line terminators are recognized: LF CRLF CR. However, special
3095 processing applies to CR:
3097 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3098 nor a local message in the state where . is a terminator.
3100 (ii) If a bare CR is encountered in a header line, an extra space is added
3101 after the line terminator so as not to end the header. The reasoning
3102 behind this is that bare CRs in header lines are most likely either
3103 to be mistakes, or people trying to play silly games.
3105 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
3106 was being incorrectly given as 18 bytes larger than it should have been.
3107 This is a VOB (very old bug).
3109 60. This may never have affected anything current, but just in case it has:
3110 When the local host is found other than at the start of a list of hosts,
3111 the local host, those with the same MX, and any that follow, are discarded.
3112 When the list in question was part of a longer list of hosts, the following
3113 hosts (not currently being processed) were also being discarded. This no
3114 longer happens. I'm not sure if this situation could ever has previously
3117 61. Added the "/MX" feature to lists of hosts in the manualroute and query
3120 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3121 header. This is something that is recommended in a new Internet Draft, and
3122 is something that is documented as being done by Sendmail. There are two
3123 possible values. For messages generated by the autoreply transport, Exim
3126 Auto-Submitted: auto-replied
3128 whereas for all other generated messages (e.g. bounces) it adds
3130 Auto-Submitted: auto-generated
3132 63. The "personal" condition in filters now includes a test for the
3133 Auto-Submitted: header. If it contains the string "auto-" the message it
3134 not considered personal.
3136 64. Added rcpt_include_affixes as a generic transport option.
3138 65. Added queue_only_override (default true).
3140 66. Added the syslog_duplication option.
3142 67. If what should have been the first header line of a message consisted of
3143 a space followed by a colon, Exim was mis-interpreting it as a header line.
3144 It isn't of course - it is syntactically invalid and should therefore be
3145 treated as the start of the message body. The misbehaviour could have
3146 caused a number of strange effects, including loss of data in subsequent
3147 header lines, and spool format errors.
3149 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3150 client host had authenticated. This control can now be exercised by an ACL
3151 for more flexibility.
3153 69. By default, callouts do not happen when testing with -bh. There is now a
3154 variant, -bhc, which does actually run the callout code, including
3155 consulting and updating the callout cache.
3157 70. Added support for saslauthd authentication, courtesy of Alexander
3160 71. If statvfs() failed on the spool or log directories while checking their
3161 size for availability, Exim confusingly gave the error "space shortage".
3162 Furthermore, in debugging mode it crashed with a floating point exception.
3163 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3164 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3165 serious problem, Exim now writes to the main and panic logs when this
3166 happens, with details of the failure. It then refuses to accept the
3167 incoming message, giving the message "spool directory problem" or "log
3168 directory problem" with a 421 code for SMTP messages.
3170 72. When Exim is about to re-exec itself, it ensures that the file descriptors
3171 0, 1, and 2 exist, because some OS complain for execs without them (see
3172 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3173 descriptors. However, the code omitted to check that the open succeeded,
3174 causing mysterious errors if for some reason the permissions on /dev/null
3175 got screwed. Now Exim writes a message to the main and panic logs, and
3176 bombs out if it can't open /dev/null.
3178 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3179 interact so that it is all more flexible. It is supposed to remain
3180 backwards compatible. Also added extra_local_interfaces.
3182 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3183 to bomb out with an assertion failure - to the client this appears as a
3184 connection drop. This problem occurs in the part of the code that was taken
3185 from the Samba project. Fortunately, the assertion is in a very simple
3186 function, so I have fixed this by reproducing the function inline in the
3187 one place where it is called, and arranging for authentication to fail
3188 instead of killing the process with assert().
3190 75. The SPA client code was not working when the server requested OEM rather
3191 than Unicode encoding.
3193 76. Added code to make require_files with a specific uid setting more usable in
3194 the case where statting the file as root fails - usually a non-root-mounted
3195 NFS file system. When this happens and the failure is EACCES, Exim now
3196 forks a subprocess and does the per-uid checking as the relevant uid.
3198 77. Added process_log_path.
3200 78. If log_file_path was not explicitly set, a setting of check_log_space or
3201 check_log_inodes was ignored.
3203 79. If a space check for the spool or log partitions fails, the incident is now
3204 logged. Of course, in the latter case the data may get lost...
3206 80. Added the %p formatting code to string_format() so that it can be used to
3207 print addresses in debug_print(). Adjusted all the address printing in the
3208 debugging in store.c to use %p rather than %d.
3210 81. There was a concern that a line of code in smtp_in.c could overflow a
3211 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3212 initially expressed, the concern was not well-founded, because trailing
3213 spaces are removed early. However, if the trailing spaces were followed by
3214 a NULL, they did not get removed, so the overflow was possible. Two fixes
3217 (a) I re-wrote the offending code in a cleaner fashion.
3218 (b) If an incoming SMTP command contains a NULL character, it is rejected
3221 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3222 runs initgroups(), so that if the Exim user is in any additional groups,
3223 they will be used during message reception.
3229 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob