Incorrect port was logged when an SRV record specified a special port.
[exim.git] / doc / doc-txt / ChangeLog
2d280592 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.203 2005/08/08 15:02:48 ph10 Exp $
3Change log file for Exim from version 4.21
6Exim version 4.53
9TK/01 Added the "success_on_redirect" address verification option. See
10 NewStuff for rationale and an example.
12PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
14PH/02 Patch to exigrep to allow it to work on syslog lines.
16PH/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.
20PH/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.
24PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
25 string_format() function, because snprintf() does not exist on all
26 operating systems.
28PH/06 The use of forbid_filter_existstest now also locks out the use of the
29 ${stat: expansion item.
31PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
32 protocol synchronization error", to keep the pedants happy.
34PH/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
36 file for comments.
38PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
40PH/10 Named domain lists were not working if used in a queue_smtp_domains
41 setting.
43PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
44 transport and to the smtp transport in LMTP mode.
46TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
48PH/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.
53PH/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.
59JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
61TK/03 Fix log output including CR from clamd.
63PH/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.
66PH/15 Installed PCRE 6.2
68PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
70PH/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
72 HP-UX compiler.
74PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
76PH/20 If a delivery was routed to a non-standard port by means of an SRV
77 record, the port was not correctly logged when the outgoing_port log
78 selector was set (it logged the transort's default port).
bbe902f0 80
81Exim version 4.52
84TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
86PH/01 When a transport filter timed out in a pipe delivery, and the pipe
87 command itself ended in error, the underlying message about the transport
88 filter timeout was being overwritten with the pipe command error. Now the
89 underlying error message should be appended to the second error message.
91TK/01 Fix poll() being unavailable on Mac OSX 10.2.
93PH/02 Reduce the amount of output that "make" produces by default. Full output
94 can still be requested.
96PH/03 The warning log line about a condition test deferring for a "warn" verb
97 was being output only once per connection, rather than after each
98 occurrence (because it was using the same function as for successful
99 "warn" verbs). This seems wrong, so I have changed it.
101TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
102 it should not have, which might have caused a crash in the right
103 circumstances, but probably never did.
105PH/04 Installed a modified version of Tony Finch's patch to make submission
106 mode fix the return path as well as the Sender: header line, and to
107 add a /name= option so that you can make the user's friendly name appear
108 in the header line.
110TF/03 Added the control = fakedefer ACL modifier.
112TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
113 Mark Lowes for thorough testing.
870f6ba8 114
115TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
117TK/03 Merged latest SRS patch from Miles Wilton.
119PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
120 with the definition in sysexits.h (which is #included earlier).
121 Fortunately, Exim does not actually use EX_OK. The code used to try to
122 preserve the sysexits.h value, by assumimg that macro definitions were
123 scanned for macro replacements. I have been disabused of this notion,
124 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 125
126PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
127 in the smtp transport. When a block could not be written in a single
128 write() function, the timeout was being re-applied to each part-write.
129 This seems wrong - if the receiver was accepting one byte at a time it
130 would take for ever. The timeout is now adjusted when this happens. It
131 doesn't have to be particularly precise.
133TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
134 details. Thanks to Chris Webb <> for the patch!
136PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
137 without a domain if the check to <postmaster@domain> fails.
139SC/01 Eximstats: added -xls and the ability to specify output files
140 (patch written by Frank Heydlauf).
142SC/02 Eximstats: use FileHandles for outputing results.
144SC/03 Eximstats: allow any combination of xls, txt, and html output.
146SC/04 Eximstats: fixed display of large numbers with -nvr option
148SC/05 Eximstats: fixed merging of reports with empty tables.
150SC/06 Eximstats: added the -include_original_destination flag
152SC/07 Eximstats: removed tabs and trailing whitespace.
154TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
156TK/06 MBOX spool code: Add real "From " MBOX separator line
157 so the .eml file is really in mbox format (even though
158 most programs do not really care). Patch from Alex Miller.
160TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
161 The latter is generated from $received_to and is only set if the
162 message has one envelope recipient. SA can use these headers,
163 obviously out-of-the-box. Patch from Alex Miller.
165PH/08 The ${def test on a variable was returning false if the variable's
166 value was "0", contrary to what the specification has always said!
167 The result should be true unless the variable is empty.
169PH/09 The syntax error of a character other than { following "${if
170 def:variable_name" (after optional whitespace) was not being diagnosed.
171 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
172 accidental colon was present, for example, could give incorrect results.
174PH/10 Tidied the code in a number of places where the st_size field of a stat()
175 result is used (not including appendfile, where other changes are about
176 to be made).
178PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
179 This involved changing a lot of size variables from int to off_t. It
180 should work with maildirs and everything.
182TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
183 spamd dying while we are connected to it.
185TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
186 <>
188PH/12 Applied Alex Kiernan's patch for the API change for the error callback
189 function for BDB 4.3.
191PH/13 Changed auto_thaw such that it does not apply to bounce messages.
193PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
194 the sources for PCRE have been re-arranged and more files are now
195 involved.
197PH/15 The code I had for printing potentially long long variables in PH/11
198 above was not the best (it lost precision). The length of off_t variables
199 is now inspected at build time, and an appropriate printing format (%ld
200 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
201 to be "long long int" or "long int". This is needed for the internal
202 formatting function string_vformat().
b1c749bb 203
204PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
205 the configuration file to be ":syslog", then the script "guesses" where
206 the logs files are, rather than using the compiled in default. In our
207 case the guess is not the same as the compiled default, so the script
208 suddenly stopped working when I started to use syslog. The patch checks
209 to see if log_file_path is "". If so, it attempts to read it from exim
210 with no configuration file to get the compiled in version, before it
211 falls back to the previous guessing code."
213TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
214 implementing BATV in an Exim configuration. See NewStuff for the gory
215 details.
217PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
218 Makefile that are specific to HP-UX.
220PH/18 If the "use_postmaster" option was set for a recipient callout together
221 with the "random" option, the postmaster address was used as the MAIL
222 FROM address for the random test, but not for the subsequent recipient
223 test. It is now used for both.
225PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
226 patch removes a few documentation additions to RFC 3028, because the
227 latest draft now contains them. It adds the new en;ascii-case comparator
228 and a new error check for 8bit text in MIME parts. Comparator and
229 require names are now matched exactly. I enabled the subaddress
230 extension, but it is not well tested yet (read: it works for me)."
232PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
233 rework some of the code of TK/09 above to avoid the hardwired use of
234 "%lld" and "long long". Replaced the call to snprintf() with a call to
235 string_vformat().
237PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
238 records point to non-existent hosts", "retry timeout exceeded", and
239 "retry time not reached for any host after a long failure period".
ca02eafb 240
241PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
242 experimental DomainKeys support:
244 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
245 (2) On an error such as an illegally used "control", the wrong name for
246 the control was given.
248 These problems did NOT occur unless DomainKeys support was compiled.
250PH/23 Added daemon_startup_retries and daemon_startup_sleep.
252PH/24 Added ${if match_ip condition.
254PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
255 databases so that it will be absolutely obvious if a crash occurs in the
256 DB library. This is a regular occurrence (often caused by mis-matched
257 db.h files).
ff790e47 259PH/26 Insert a lot of missing (void) casts for functions such as chown(),
260 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
261 picked up on a user's system that detects such things. There doesn't seem
262 to be a gcc warning option for this - only an attribute that has to be
263 put on the function's prototype. It seems that in Fedora Core 4 they have
264 set this on a number of new functions. No doubt there will be more in due
265 course.
ff790e47 266
267PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
268 specify a transport. However, if an address that was verified by such a
269 router was the subject of a callout, Exim crashed because it tried to
270 read the rcpt_include_affixes from the non-existent transport. Now it
271 just assumes that the setting of that option is false. This bug was
272 introduced by 4.51/PH/31.
274PH/28 Changed -d+all to exclude +memory, because that information is very
275 rarely of interest, but it makes the output a lot bigger. People tend to
276 do -d+all out of habit.
278PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
279 code in os-type was giving problems when lives in lib64, like on
280 x86_64 Fedora Core.
282PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
283 aren't the modern standard, and it seems that some systems' include files
284 don't always have them. Exim was already checking for some of the newer
285 ones like T_AAAA, and defining it itself. I've added checks for all the
286 record types that Exim uses.
288PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
289 not automatically generating a new one, as it is supposed to. This
290 prevented TLS from working. If the file did exist, but contained invalid
291 data, a new version was generated, as expected. It was only the case of a
292 non-existent file that was broken.
294TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
295 with a change in libdomainkeys > 0.64.
297TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
298 from DNS. If the selector record carries the flag, it now has
299 precedence over the domain-wide flag.
301TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
303PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
304 the use of a port name that isn't defined in /etc/services) occurred, the
305 message was deferred as in a normal delivery, and thus remained on the
306 spool, instead of being failed because of the mua_wrapper setting. This
307 is now fixed, and I tidied up some of the mua_wrapper messages at the
308 same time.
310SC/08 Eximstats: whilst parsing the mainlog(s), store information about
311 the messages in a hash of arrays rather than using individual hashes.
312 This is a bit cleaner and results in dramatic memory savings, albeit
313 at a slight CPU cost.
315SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
316 as requested by Marc Sherman.
318SC/10 Eximstats: added histograms for user specified patterns as requested
319 by Marc Sherman.
321SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
323PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
324 fopen() in the content-scanning modules that did not already have it.
e7ad8a65 326
327Exim version 4.51
330TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
331 doc/experimental-spec.txt for details. (
2f079f46 333TK/02 Fix ACL "control" statement not being available in MIME ACL.
335TK/03 Fix ACL "regex" condition not being available in MIME ACL.
337PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
338 to test Sieve filters that use "vacation".
340PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
341 that changes the way the GnuTLS parameters are stored in the cache file.
342 The new format can be generated externally. For backward compatibility,
343 if the data in the cache doesn't make sense, Exim assumes it has read an
344 old-format file, and it generates new data and writes a new file. This
345 means that you can't go back to an older release without removing the
346 file.
348PH/03 A redirect router that has both "unseen" and "one_time" set does not
349 work if there are any delivery delays because "one_time" forces the
350 parent to be marked "delivered", so its unseen clone is never tried
351 again. For this reason, Exim now forbids the simultaneous setting of
352 these two options.
354PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
355 redirected to themselves ("homonym" addresses). Read the long ChangeLog
356 entry if you want to know the details. The fix, however, neglected to
357 consider the case when local delivery batching is involved. The test for
358 "previously delivered" was not happening when checking to see if an
359 address could be batched with a previous (undelivered) one; under
360 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 361 address.
363PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
364 in its include files, and this causes problems building Exim.
366PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
367 header_syntax) but Exim was just ignoring anything given after a slash.
368 In particular, this caused confusion with an attempt to use "verify =
369 reverse_host_lookup/defer_ok". An error is now given when options are
370 supplied for verify items that do not have them. (Maybe reverse_host_
371 lookup should have a defer_ok option, but that's a different point.)
373PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
374 defined by RFC 821) to 2048, because there were problems with some AUTH
375 commands, and RFC 1869 says the size should be increased for extended
376 SMTP commands that take arguments.
378PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
379 Finch).
381PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
382 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 383
384PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
385 an address' error message when a string expansion fails (syntax or
386 whatever). Otherwise the password may appear in the log. Following change
387 PH/42 below, there is no longer a chance of it appearing in a bounce
388 message.
49c2d5ea 389
390PH/11 Installed exipick version 20050225.0 from John Jetmore.
392PH/12 If the last host in a fallback_hosts list was multihomed, only the first
393 of its addresses was ever tried. (Bugzilla bug #2.)
395PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
396 the result incorrectly in the debug output. (It correctly added a newline
397 to what was transported.)
399TF/01 Added $received_time.
401PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
402 commented out examples of how to interface to a virus scanner and to
403 SpamAssassin. Also added commented examples of av_scanner and
404 spamd_address settings.
406PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
407 and controls are allowed in which ACLs. There were a couple of minor
408 errors. Some of the entries in the conditions table (which is a table of
409 where they are NOT allowed) were getting very unwieldy; rewrote them as a
410 negation of where the condition IS allowed.
412PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
414PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
415 header file does not have a version number, so I've had to invent a new
416 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
417 API. The code is untested by me (my Linux distribution still has 0.3.2 of
418 radiusclient), but it was contributed by a Radius user.
420PH/18 Installed Lars Mainka's patch for the support of CRL collections in
421 files or directories, for OpenSSL.
423PH/19 When an Exim process that is running as root has to create an Exim log
424 file, it does so in a subprocess that runs as exim:exim so as to get the
425 ownership right at creation (otherwise, other Exim processes might see
426 the file with the wrong ownership). There was no test for failure of this
427 fork() call, which would lead to the process getting stuck as it waited
428 for a non-existent subprocess. Forks do occasionally fail when resources
429 run out. I reviewed all the other calls to fork(); they all seem to check
430 for failure.
432PH/20 When checking for unexpected SMTP input at connect time (before writing
433 the banner), Exim was not dealing correctly with a non-positive return
434 from the read() function. If the client had disconnected by this time,
435 the result was a log entry for a synchronization error with an empty
436 string after "input=" when read() returned zero. If read() returned -1
437 (an event I could not check), uninitialized data bytes were printed.
438 There were reports of junk text (parts of files, etc) appearing after
439 "input=".
441PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
443PH/22 Added support for macro redefinition, and (re)definition in between
444 driver and ACL definitions.
446PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
447 forgetting to use the resulting value; it was using the unexpanded value.
449PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
450 hadn't been configured. The fix is from Juergen Kreileder, who
451 understands it better than I do:
453 "Here's what I see happening with three configured cyrus_sasl
454 authenticators configured (plain, login, cram-md5):
456 On startup auth_cyrus_sasl_init() gets called for each of these.
457 This means three calls to sasl_listmech() without a specified mech_list.
458 => SASL tests which mechs of all available mechs actually work
459 => three warnings about OTP not working
460 => the returned list contains: plain, login, cram-md5, digest-md5, ...
462 With the patch, sasl_listmech() also gets called three times. But now
463 SASL's mech_list option is set to the server_mech specified in the the
464 authenticator. Or in other words, the answer from sasl_listmech()
465 gets limited to just the mech you're testing for (which is different
466 for each call.)
467 => the return list contains just 'plain' or 'login', 'cram-md5' or
468 nothing depending on the value of ob->server_mech.
470 I've just tested the patch: Authentication still works fine,
471 unavailable mechs specified in the exim configuration are still
472 caught, and the auth.log warnings about OTP are gone."
474PH/25 When debugging is enabled, the contents of the command line are added
475 to the debugging output, even when log_selector=+arguments is not
476 specified.
478PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
479 answer is "GNU", and only if the return is "GNU/something" is the answer
480 "Linux".
482PH/27 $acl_verify_message is now set immediately after the failure of a
483 verification in an ACL, and so is available in subsequent modifiers. In
484 particular, the message can be preserved by coding like this:
486 warn !verify = sender
487 set acl_m0 = $acl_verify_message
489 Previously, $acl_verify_message was set only while expanding "message"
490 and "log_message" when a very denied access.
492PH/28 Modified OS/os.c-Linux with
494 -#ifndef OS_LOAD_AVERAGE
495 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
497 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
498 nomenclature these days.)
500PH/29 Installed patch from the Sieve maintainer that adds the options
501 sieve_useraddress and sieve_subaddress to the redirect router.
503PH/30 In these circumstances:
504 . Two addresses routed to the same list of hosts;
505 . First host does not offer TLS;
506 . First host accepts first address;
507 . First host gives temporary error to second address;
508 . Second host offers TLS and a TLS session is established;
509 . Second host accepts second address.
510 Exim incorrectly logged both deliveries with the TLS parameters (cipher
511 and peerdn, if requested) that were in fact used only for the second
512 address.
7e8bec7a 513
514PH/31 When doing a callout as part of verifying an address, Exim was not paying
515 attention to any local part prefix or suffix that was matched by the
516 router that accepted the address. It now behaves in the same way as it
517 does for delivery: the affixes are removed from the local part unless
518 rcpt_include_affixes is set on the transport.
520PH/32 Add the sender address, as F=<...>, to the log line when logging a
521 timeout during the DATA phase of an incoming message.
523PH/33 Sieve envelope tests were broken for match types other than :is. I have
524 applied a patch sanctioned by the Sieve maintainer.
c688b954 525
526PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
527 the uid or gid is negative. A case of a negative gid caused this to be
528 noticed. The fix allows for either to be negative.
530PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
531 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
532 overlooked.
534PH/36 The change PH/12 above was broken. Fixed it.
536PH/37 Exim used to check for duplicate addresses in the middle of routing, on
537 the grounds that routing the same address twice would always produce the
538 same answer. This might have been true once, but it is certainly no
539 longer true now. Routing a child address may depend on the previous
540 routing that produced that child. Some complicated redirection strategies
541 went wrong when messages had multiple recipients, and made Exim's
542 behaviour dependent on the order in which the addresses were given.
544 I have moved the duplicate checking until after the routing is complete.
545 Exim scans the addresses that are assigned to local and remote
546 transports, and removes any duplicates. This means that more work will be
547 done, as duplicates will always all be routed, but duplicates are
548 presumably rare, so I don't expect this is of any significance.
550 For deliveries to pipes, files, and autoreplies, the duplicate checking
551 still happens during the routing process, since they are not going to be
552 routed further.
554PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
555 It corrects a timeout issue with spamd. This is Ian's comment: "The
556 background is that sometimes spamd either never reads data from a
557 connection it has accepted, or it never writes response data. The exiscan
558 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
559 blindly assumes that writes won't block so it may never time out."
561PH/39 Allow G after quota size as well as K and M.
563PH/40 The value set for $authenticated_id in an authenticator may not contain
564 binary zeroes or newlines because the value is written to log lines and
565 to spool files. There was no check on this. Now the value is run through
566 the string_printing() function so that such characters are converted to
567 printable escape sequences.
569PH/41 $message_linecount is a new variable that contains the total number of
570 lines in the message. Compare $body_linecount, which is the count for the
571 body only.
573PH/42 Exim no longer gives details of delivery errors for specific addresses in
574 bounce and delay warning messages, except in certain special cases, which
575 are as follows:
577 (a) An SMTP error message from a remote host;
578 (b) A message specified in a :fail: redirection;
579 (c) A message specified in a "fail" command in a system filter;
580 (d) A message specified in a FAIL return from the queryprogram router;
581 (e) A message specified by the cannot_route_message router option.
583 In these cases only, Exim does include the error details in bounce and
584 warning messages. There are also a few cases where bland messages such
585 as "unrouteable address" or "local delivery error" are given.
587PH/43 $value is now also set for the "else" part of a ${run expansion.
589PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
590 being worked on, but at least Exim now implements the latest version to
591 play with."
593PH/45 In a pipe transport, although a timeout while waiting for the pipe
594 process to complete was treated as a delivery failure, a timeout while
595 writing the message to the pipe was logged, but erroneously treated as a
596 successful delivery. Such timeouts include transport filter timeouts. For
597 consistency with the overall process timeout, these timeouts are now
598 treated as errors, giving rise to delivery failures by default. However,
599 there is now a new Boolean option for the pipe transport called
600 timeout_defer, which, if set TRUE, converts the failures into defers for
601 both kinds of timeout. A transport filter timeout is now identified in
602 the log output.
604PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
605 systems where "make" and "gmake" are different, calling "gmake" at top
606 level broke things. I've arranged for the value of $(MAKE) to be passed
607 from the Makefile to this script so that it can call the same version of
608 "make".
7982096b 610
611A note about Exim versions 4.44 and 4.50
614Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
615changes of various kinds. As a consequence, a big documentation update was
616needed. This delayed the release for rather longer than seemed good, especially
617in the light of a couple of (minor) security issues. Therefore, the changes
618that fixed bugs were backported into 4.43, to create a 4.44 maintenance
619release. So 4.44 and 4.50 are in effect two different branches that both start
620from 4.43.
622I have left the 4.50 change log unchanged; it contains all the changes since
6234.43. The change log for 4.44 is below; many of its items are identical to
624those for 4.50. This seems to be the most sensible way to preserve the
625historical information.
f7b63901 628Exim version 4.50
631 1. Minor wording change to the doc/README.SIEVE file.
139059f6 633 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 634 computation of the current number of files was incorrect.
495ae4b0 635
636 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
637 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
638 place.
640 4. Give more explanation in the error message when the command for a transport
641 filter fails to execute.
643 5. There are several places where Exim runs a non-Exim command in a
644 subprocess. The SIGUSR1 signal should be disabled for these processes. This
645 was being done only for the command run by the queryprogram router. It is
646 now done for all such subprocesses. The other cases are: ${run, transport
647 filters, and the commands run by the lmtp and pipe transports.
649 6. Added CONFIGURE_GROUP build-time option.
651 7. Some older OS have a limit of 256 on the maximum number of file
652 descriptors. Exim was using setrlimit() to set 1000 as a large value
653 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
654 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 655
656 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
657 was an oversight, and furthermore, ever since the addition of extra
658 controls (e.g. 4.43/32), the checks on when to allow different forms of
659 "control" were broken. There should now be diagnostics for all cases when a
660 control that does not make sense is encountered.
662 9. Added the /retain_sender option to "control=submission".
66410. $recipients is now available in the predata ACL (oversight).
66611. Tidy the search cache before the fork to do a delivery from a message
667 received from the command line. Otherwise the child will trigger a lookup
668 failure and thereby defer the delivery if it tries to use (for example) a
669 cached ldap connection that the parent has called unbind on.
67112. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
672 of $address_data from the recipient verification was clobbered by the
673 sender verification.
67513. The value of address_data from a sender verification is now available in
676 $sender_address_data in subsequent conditions in the ACL statement.
67814. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
68015. Added a new option "connect=<time>" to callout options, to set a different
681 connection timeout.
68316. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
684 was its contents. (It was OK if the option was not defined at all.)
68617. A "Completed" log line is now written for messages that are removed from
687 the spool by the -Mrm option.
68918. New variables $sender_verify_failure and $recipient_verify_failure contain
690 information about exactly what failed.
69219. Added -dd to debug only the daemon process.
69420. Incorporated Michael Haardt's patch to ldap.c for improving the way it
695 handles timeouts, both on the server side and network timeouts. Renamed the
696 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
69821. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
699 It is now set to "smtps".
70122. $host_address is now set to the target address during the checking of
702 ignore_target_hosts.
70423. When checking ignore_target_hosts for an ipliteral router, no host name was
705 being passed; this would have caused $sender_host_name to have been used if
706 matching the list had actually called for a host name (not very likely,
707 since this list is usually IP addresses). A host name is now passed as
708 "[x.x.x.x]".
71024. Changed the calls that set up the SIGCHLD handler in the daemon to use the
711 code that specifies a non-restarting handler (typically sigaction() in
712 modern systems) in an attempt to fix a rare and obscure crash bug.
71425. Narrowed the window for a race in the daemon that could cause it to ignore
715 SIGCHLD signals. This is not a major problem, because they are used only to
716 wake it up if nothing else does.
71826. A malformed maildirsize file could cause Exim to calculate negative values
719 for the mailbox size or file count. Odd effects could occur as a result.
720 The maildirsize information is now recalculated if the size or filecount
721 end up negative.
72327. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
724 support for a long time. Removed HAVE_SYS_VFS_H.
72628. Installed the latest version of exipick from John Jetmore.
72829. In an address list, if the pattern was not a regular expression, an empty
729 subject address (from a bounce message) matched only if the pattern was an
730 empty string. Non-empty patterns were not even tested. This was the wrong
731 because it is perfectly reasonable to use an empty address as part of a
732 database query. An empty address is now tested by patterns that are
733 lookups. However, all the other forms of pattern expect the subject to
734 contain a local part and a domain, and therefore, for them, an empty
735 address still always fails if the pattern is not itself empty.
73730. Exim went into a mad DNS loop when attempting to do a callout where the
738 host was specified on an smtp transport, and looking it up yielded more
739 than one IP address.
74131. Re-factored the code for checking spool and log partition space into a
742 function that finds that data and another that does the check. The former
743 is then used to implement four new variables: $spool_space, $log_space,
744 $spool_inodes, and $log_inodes.
74632. The RFC2047 encoding function was originally intended for short strings
747 such as real names; it was not keeping to the 75-character limit for
748 encoded words that the RFC imposes. It now respects the limit, and
749 generates multiple encoded words if necessary. To be on the safe side, I
750 have increased the buffer size for the ${rfc2047: expansion operator from
751 1024 to 2048 bytes.
75333. It is now permitted to omit both strings after an "if" condition; if the
754 condition is true, the result is "true". As before, when the second string
755 is omitted, a false condition yields an empty string. This makes it less
756 cumbersome to write custom ACL and router conditions.
75834. Failure to deliver a bounce message always caused it to be frozen, even if
759 there was an errors_to setting on the router. The errors_to setting is now
760 respected.
76235. If an IPv6 address is given for -bh or -bhc, it is now converted to the
763 canonical form (fully expanded) before being placed in
764 $sender_host_address.
76636. The table in the code that translates DNS record types into text (T_A to
767 "A" for instance) was missing entries for NS and CNAME. It is just possible
768 that this could have caused confusion if both these types were looked up
769 for the same domain, because the text type is used as part of Exim's
770 per-process caching. But the chance of anyone hitting this buglet seems
771 very small.
77337. The dnsdb lookup has been extended in a number of ways.
775 (1) There is a new type, "zns", which walks up the domain tree until it
776 finds some nameserver records. It should be used with care.
778 (2) There is a new type, "mxh", which is like "mx" except that it returns
779 just the host names, not the priorities.
781 (3) It is now possible to give a list of domains (or IP addresses) to be
782 looked up. The behaviour when one of the lookups defers can be
783 controlled by a keyword.
7bb56e1f 784
ea3bc19b 785 (4) It is now possible to specify the separator character for use when
7bb56e1f 786 multiple records are returned.
33397d19 787
78838. The dnslists ACL condition has been extended: it is now possible to supply
789 a list of IP addresses and/or domains to be looked up in a particular DNS
790 domain.
79239. Added log_selector=+queue_time_overall.
79440. When running the queue in the test harness, wait just a tad after forking a
795 delivery process, to get repeatability of debugging output.
79741. Include certificate and key file names in error message when GnuTLS fails
798 to set them up, because the GnuTLS error message doesn't include the name
799 of the failing file when there is a problem reading it.
80142. Allow both -bf and -bF in the same test run.
80343. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
80544. The "Exiscan patch" is now merged into the mainline Exim source.
80745. Sometimes the final signoff response after QUIT could fail to get
808 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
809 < 0 before doing a fflush(). This bug looks as though it goes back to the
810 introduction of TLS in release 3.20, but "sometimes" must have been rare
811 because the tests only now provoked it.
81346. Reset the locale to "C" after calling embedded Perl, in case it was changed
814 (this can affect the format of dates).
81647. exim_tidydb, when checking for the continued existence of a message for
817 which it has found a message-specific retry record, was not finding
818 messages that were in split spool directories. Consequently, it was
819 deleting retry records that should have stayed in existence.
82148. Steve fixed some bugs in eximstats.
82349. The SPA authentication driver was not abandoning authentication and moving
824 on to the next authenticator when an expansion was forced to fail,
825 contradicting the general specification for all authenticators. Instead it
826 was generating a temporary error. It now behaves as specified.
82850. The default ordering of permitted cipher suites for GnuTLS was pessimal
829 (the order specifies the preference for clients). The order is now AES256,
830 AES128, 3DES, ARCFOUR128.
83251. Small patch to Sieve code - explicitly set From: when generating an
833 autoreply.
83552. Exim crashed if a remote delivery caused a very long error message to be
836 recorded - for instance if somebody sent an entire SpamAssassin report back
837 as a large number of 550 error lines. This bug was coincidentally fixed by
838 increasing the size of one of Exim's internal buffers (big_buffer) that
839 happened as part of the Exiscan merge. However, to be on the safe side, I
840 have made the code more robust (and fixed the comments that describe what
841 is going on).
84353. Now that there can be additional text after "Completed" in log lines (if
844 the queue_time_overall log selector is set), a one-byte patch to exigrep
845 was needed to allow it to recognize "Completed" as not the last thing in
846 the line.
84854. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
849 patch that reportedly fixes this has been added. I am not expert enough to
850 create a test for it. This is what the patch creator wrote:
852 "I found a little strange behaviour of ldap code when working with
853 Windows 2003 AD Domain, where users was placed in more than one
854 Organization Units. When I tried to give exim partial DN, the exit code
855 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
856 But simultaneously result of request was absolutely normal ldap result,
857 so I produce this patch..."
859 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
860 REFERENCE, so I have modified the code to exclude the patch when that macro
861 is not defined.
86355. Some experimental protocols are using DNS PTR records for new purposes. The
864 keys for these records are domain names, not reversed IP addresses. The
865 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
866 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 867 CAN-2005-0021
7102e136 868
86956. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
87157. Double the size of the debug message buffer (to 2048) so that more of very
872 long debug lines gets shown.
87458. The exicyclog utility now does better if the number of log files to keep
875 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
87759. Two changes related to the smtp_active_hostname option:
879 (1) $smtp_active_hostname is now available as a variable.
880 (2) The default for smtp_banner uses $smtp_active_hostname instead
881 of $primary_hostname.
88360. The host_aton() function is supposed to be passed a string that is known
884 to be a valid IP address. However, in the case of IPv6 addresses, it was
885 not checking this. This is a hostage to fortune. Exim now panics and dies
886 if the condition is not met. A case was found where this could be provoked
887 from a dnsdb PTR lookup with an IPv6 address that had more than 8
888 components; fortuitously, this particular loophole had already been fixed
889 by change 4.50/55 above.
891 If there are any other similar loopholes, the new check in host_aton()
892 itself should stop them being exploited. The report I received stated that
893 data on the command line could provoke the exploit when Exim was running as
894 exim, but did not say which command line option was involved. All I could
895 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
896 running as the user.
ea3a6f44 897 CAN-2005-0021
89961. There was a buffer overflow vulnerability in the SPA authentication code
900 (which came originally from the Samba project). I have added a test to the
901 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 902 CAN-2005-0022
b975ba52 903
90462. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
905 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
90763. The daemon start-up calls getloadavg() while still root for those OS that
908 need the first call to be done as root, but it missed one case: when
909 deliver_queue_load_max is set with deliver_drop_privilege. This is
910 necessary for the benefit of the queue runner, because there is no re-exec
911 when deliver_drop_privilege is set.
91364. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
914 This has been fixed.
91665. Caching of lookup data for "hosts =" ACL conditions, when a named host list
917 was in use, was not putting the data itself into the right store pool;
918 consequently, it could be overwritten for a subsequent message in the same
919 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
920 the caching.)
92266. Added hosts_max_try_hardlimit to the smtp transport, default 50.
92467. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
925 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
926 the function were treating the return as a boolean value, which happened to
927 work because 0=false and not-0=true, but is not correct code.
92968. The host_aton() function was not handling scoped IPv6 addresses (those
930 with, for example, "%eth0" on the end) correctly.
93269. Fixed some compiler warnings in acl.c for the bitmaps specified with
933 negated items (that is, ~something) in unsigned ints. Some compilers
934 apparently mutter when there is no cast.
93670. If an address verification called from an ACL failed, and did not produce a
937 user-specific message (i.e. there was only a "system" message), nothing was
938 put in $acl_verify_message. In this situation, it now puts the system
939 message there.
94171. Change 4.23/11 added synchronization checking at the start of an SMTP
942 session; change 4.31/43 added the unwanted input to the log line - except
943 that it did not do this in the start of session case. It now does.
94572. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
946 This is wrong and can cause the other end to generate a synchronization
947 error if it is another Exim or anything else that does the synchronization
948 check. A QUIT command is no longer sent after a timeout.
95073. $host_lookup_deferred has been added, to make it easier to detect DEFERs
951 during host lookups.
95374. The defer_ok option of callout verification was not working if it was used
954 when verifying addresses in header lines, that is, for this case:
956 verify = header_sender/callout=defer_ok
95875. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
959 those file descriptors could be used for SMTP connections. If anything
960 wrote to stderr (the example that came up was "warn" in embedded Perl), it
961 could be sent to the SMTP client, causing chaos. The daemon now opens
962 stdin, stdout, and stderr to /dev/null when it puts itself into the
963 background.
96576. Arrange for output from Perl's "warn" command to be written to Exim's main
966 log by default. The user can override this with suitable Perl magic.
96877. The use of log_message on a "discard" ACL verb, which is supposed to add to
969 the log message when discard triggers, was not working for the DATA ACL or
970 for the non-SMTP ACL.
97278. Error message wording change in sieve.c.
97479. If smtp_accept_max_per_host was set, the number of connections could be
975 restricted to fewer than expected, because the daemon was trying to set up
976 a new connection before checking whether the processes handling previous
977 connections had finished. The check for completed processes is now done
978 earlier. On busy systems, this bug wouldn't be noticed because something
979 else would have woken the daemon, and it would have reaped the completed
980 process earlier.
98280. If a message was submitted locally by a user whose login name contained one
983 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
984 It caused a spool format error. I have fixed the spool reading code. A
985 related problem was that the "from" clause in the Received: line became
986 illegal because of the space(s). It is now covered by ${quote_local_part.
98881. Included the latest eximstats from Steve (adds average sizes to HTML Top
989 tables).
99182. Updated OS/Makefile-AIX as per message from Mike Meredith.
99383. Patch from Sieve maintainer to fix unterminated string problem in
994 "vacation" handling.
99684. Some minor changes to the Linux configuration files to help with other
997 OS variants using glibc.
99985. One more patch for Sieve to update vacation handling to latest spec.
495ae4b0 1001
1003See the note above about the 4.44 and 4.50 releases.
1007Exim version 4.44
1010 1. Change 4.43/35 introduced a bug that caused file counts to be
1011 incorrectly computed when quota_filecount was set in an appendfile
1012 transport
1014 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1015 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1016 place.
1018 3. Give more explanation in the error message when the command for a transport
1019 filter fails to execute.
1021 4. There are several places where Exim runs a non-Exim command in a
1022 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1023 was being done only for the command run by the queryprogram router. It is
1024 now done for all such subprocesses. The other cases are: ${run, transport
1025 filters, and the commands run by the lmtp and pipe transports.
1027 5. Some older OS have a limit of 256 on the maximum number of file
1028 descriptors. Exim was using setrlimit() to set 1000 as a large value
1029 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1030 systems. I've change it so that if it can't get 1000, it tries for 256.
1032 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1033 was an oversight, and furthermore, ever since the addition of extra
1034 controls (e.g. 4.43/32), the checks on when to allow different forms of
1035 "control" were broken. There should now be diagnostics for all cases when a
1036 control that does not make sense is encountered.
1038 7. $recipients is now available in the predata ACL (oversight).
1040 8. Tidy the search cache before the fork to do a delivery from a message
1041 received from the command line. Otherwise the child will trigger a lookup
1042 failure and thereby defer the delivery if it tries to use (for example) a
1043 cached ldap connection that the parent has called unbind on.
1045 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1046 of $address_data from the recipient verification was clobbered by the
1047 sender verification.
104910. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1050 was its contents. (It was OK if the option was not defined at all.)
105211. A "Completed" log line is now written for messages that are removed from
1053 the spool by the -Mrm option.
105512. $host_address is now set to the target address during the checking of
1056 ignore_target_hosts.
105813. When checking ignore_target_hosts for an ipliteral router, no host name was
1059 being passed; this would have caused $sender_host_name to have been used if
1060 matching the list had actually called for a host name (not very likely,
1061 since this list is usually IP addresses). A host name is now passed as
1062 "[x.x.x.x]".
106414. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1065 code that specifies a non-restarting handler (typically sigaction() in
1066 modern systems) in an attempt to fix a rare and obscure crash bug.
106815. Narrowed the window for a race in the daemon that could cause it to ignore
1069 SIGCHLD signals. This is not a major problem, because they are used only to
1070 wake it up if nothing else does.
107216. A malformed maildirsize file could cause Exim to calculate negative values
1073 for the mailbox size or file count. Odd effects could occur as a result.
1074 The maildirsize information is now recalculated if the size or filecount
1075 end up negative.
107717. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1078 support for a long time. Removed HAVE_SYS_VFS_H.
ea3a6f44 108018. Updated exipick to current release from John Jetmore.
108219. Allow an empty sender to be matched against a lookup in an address list.
1083 Previously the only cases considered were a regular expression, or an
1084 empty pattern.
108620. Exim went into a mad DNS lookup loop when doing a callout where the
1087 host was specified on the transport, if the DNS lookup yielded more than
1088 one IP address.
109021. The RFC2047 encoding function was originally intended for short strings
1091 such as real names; it was not keeping to the 75-character limit for
1092 encoded words that the RFC imposes. It now respects the limit, and
1093 generates multiple encoded words if necessary. To be on the safe side, I
1094 have increased the buffer size for the ${rfc2047: expansion operator from
1095 1024 to 2048 bytes.
bbe902f0 1096
109722. Failure to deliver a bounce message always caused it to be frozen, even if
1098 there was an errors_to setting on the router. The errors_to setting is now
1099 respected.
110123. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1102 canonical form (fully expanded) before being placed in
1103 $sender_host_address.
110524. Updated eximstats to version 1.33
110725. Include certificate and key file names in error message when GnuTLS fails
1108 to set them up, because the GnuTLS error message doesn't include the name
1109 of the failing file when there is a problem reading it.
111126. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1112 As per change 25.
bbe902f0 1113
111427. Reset the locale to "C" after calling embedded Perl, in case it was changed
1115 (this can affect the format of dates).
bbe902f0 1116
111728. exim_tidydb, when checking for the continued existence of a message for
1118 which it has found a message-specific retry record, was not finding
1119 messages that were in split spool directories. Consequently, it was
1120 deleting retry records that should have stayed in existence.
112229. eximstats updated to version 1.35
1123 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1124 1.35 - bugfix such that pie charts by volume are generated correctly
112630. The SPA authentication driver was not abandoning authentication and moving
1127 on to the next authenticator when an expansion was forced to fail,
1128 contradicting the general specification for all authenticators. Instead it
1129 was generating a temporary error. It now behaves as specified.
bbe902f0 1130
113131. The default ordering of permitted cipher suites for GnuTLS was pessimal
1132 (the order specifies the preference for clients). The order is now AES256,
1133 AES128, 3DES, ARCFOUR128.
bbe902f0 1134
113531. Small patch to Sieve code - explicitly set From: when generating an
1136 autoreply.
bbe902f0 1137
113832. Exim crashed if a remote delivery caused a very long error message to be
1139 recorded - for instance if somebody sent an entire SpamAssassin report back
1140 as a large number of 550 error lines. This bug was coincidentally fixed by
1141 increasing the size of one of Exim's internal buffers (big_buffer) that
1142 happened as part of the Exiscan merge. However, to be on the safe side, I
1143 have made the code more robust (and fixed the comments that describe what
1144 is going on).
bbe902f0 1145
114633. Some experimental protocols are using DNS PTR records for new purposes. The
1147 keys for these records are domain names, not reversed IP addresses. The
1148 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1149 leaves it alone. Component reversal etc. now happens only for IP addresses.
1150 CAN-2005-0021
115234. The host_aton() function is supposed to be passed a string that is known
1153 to be a valid IP address. However, in the case of IPv6 addresses, it was
1154 not checking this. This is a hostage to fortune. Exim now panics and dies
1155 if the condition is not met. A case was found where this could be provoked
1156 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1157 components; fortuitously, this particular loophole had already been fixed
1158 by change 4.50/55 or 4.44/33 above.
1160 If there are any other similar loopholes, the new check in host_aton()
1161 itself should stop them being exploited. The report I received stated that
1162 data on the command line could provoke the exploit when Exim was running as
1163 exim, but did not say which command line option was involved. All I could
1164 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1165 running as the user.
1166 CAN-2005-0021
116835. There was a buffer overflow vulnerability in the SPA authentication code
1169 (which came originally from the Samba project). I have added a test to the
1170 spa_base64_to_bits() function which I hope fixes it.
1171 CAN-2005-0022
117336. The daemon start-up calls getloadavg() while still root for those OS that
1174 need the first call to be done as root, but it missed one case: when
1175 deliver_queue_load_max is set with deliver_drop_privilege. This is
1176 necessary for the benefit of the queue runner, because there is no re-exec
1177 when deliver_drop_privilege is set.
bbe902f0 1178
117937. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1180 was in use, was not putting the data itself into the right store pool;
1181 consequently, it could be overwritten for a subsequent message in the same
1182 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1183 the caching.)
bbe902f0 1184
118538. Sometimes the final signoff response after QUIT could fail to get
1186 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1187 < 0 before doing a fflush(). This bug looks as though it goes back to the
1188 introduction of TLS in release 3.20, but "sometimes" must have been rare
1189 because the tests only now provoked it.
1192Exim version 4.43
1195 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1196 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1197 Now it returns an integer. A number of calls were still expecting a T/F
1198 return. Fortuitously, in all cases, the tests worked in OK situations,
1199 which is the norm. However, things would have gone wrong on any write
1200 failures on the smtp file descriptor. This function is used when sending
1201 messages over SMTP and also when doing verify callouts.
1203 2. When Exim is called to do synchronous delivery of a locally submitted
1204 message (the -odf or -odi options), it no longer closes stderr before doing
1205 the delivery.
1207 3. Implemented the mua_wrapper option.
1209 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1211 5. Implemented the functions header_remove(), header_testname(),
1212 header_add_at_position(), and receive_remove_recipient(), and exported them
1213 to local_scan().
1215 6. If an ACL "warn" statement specified the addition of headers, Exim already
1216 inserted X-ACL-Warn: at the start if there was no header name. However, it
1217 was not making this test for the second and subsequent header lines if
1218 there were newlines in the string. This meant that an invalid header could
1219 be inserted if Exim was badly configured.
1221 7. Allow an ACL "warn" statement to add header lines at the start or after all
1222 the Received: headers, as well as at the end.
1224 8. Added the rcpt_4xx retry error code.
1226 9. Added postmaster_mailfrom=xxx to callout verification option.
122810. Added mailfrom=xxxx to the callout verification option, for verify=
1229 header_sender only.
123111. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1232 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
123412. Inserted some casts to stop certain compilers warning when using pointer
1235 differences as field lengths or precisions in printf-type calls (mostly
1236 affecting debugging statements).
123813. Added optional readline() support for -be (dynamically loaded).
124014. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1241 same clock tick as a message's arrival, so that its received time was the
1242 same as the "first fail" time on the retry record, and that message
1243 remained on the queue past the ultimate address timeout, every queue runner
1244 would try a delivery (because it was past the ultimate address timeout) but
1245 after another failure, the ultimate address timeout, which should have then
1246 bounced the address, did not kick in. This was a "< instead of <=" error;
1247 in most cases the first failure would have been in the next clock tick
1248 after the received time, and all would be well.
125015. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1251 being recognized when the domain list was tested by the match_domain
1252 condition in an expansion string.
125416. Added the ${str2b64: operator.
125617. Exim was always calling setrlimit() to set a large limit for the number of
1257 processes, without checking whether the existing limit was already
1258 adequate. (It did check for the limit on file descriptors.) Furthermore,
1259 errors from getrlimit() and setrlimit() were being ignored. Now they are
1260 logged to the main and panic logs, but Exim does carry on, to try to do its
1261 job under whatever limits there are.
126318. Imported PCRE 5.0.
126519. Trivial typo in log message " temporarily refused connection" (the leading
1266 space).
126820. If the log selector return_path_on_delivery was set and an address was
1269 redirected to /dev/null, the delivery process crashed because it assumed
1270 that a return path would always be set for a "successful" delivery. In this
1271 case, the whole delivery is bypassed as an optimization, and therefore no
1272 return path is set.
127421. Internal re-arrangement: the function for sending a challenge and reading
1275 a response while authentication was assuming a zero-terminated challenge
1276 string. It's now changed to take a pointer and a length, to allow for
1277 binary data in such strings.
127922. Added the cyrus_sasl authenticator (code supplied by MBM).
128123. Exim was not respecting finduser_retries when seeking the login of the
1282 uid under which it was called; it was always trying 10 times. (The default
1283 setting of finduser_retries is zero.) Also, it was sleeping after the final
1284 failure, which is pointless.
128624. Implemented tls_on_connect_ports.
128825. Implemented acl_smtp_predata.
129026. If the domain in control=submission is set empty, Exim assumes that the
1291 authenticated id is a complete email address when it generates From: or
1292 Sender: header lines.
129427. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1295 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1296 chown and chgrp in /bin and hostname in /usr/bin.
129828. Exim was keeping the "process log" file open after each use, just as it
1299 does for the main log. This opens the possibility of it remaining open for
1300 long periods when the USR1 signal hits a daemon. Occasional processlog
1301 errors were reported, that could have been caused by this. Anyway, it seems
1302 much more sensible not to leave this file open at all, so that is what now
1303 happens.
130529. The long-running daemon process does not normally write to the log once it
1306 has entered its main loop, and it closes the log before doing so. This is
1307 so that log files can straightforwardly be renamed and moved. However,
1308 there are a couple of unusual error situations where the daemon does write
1309 log entries, and I had neglected to close the log afterwards.
131130. The text of an SMTP error response that was received during a remote
1312 delivery was being truncated at 512 bytes. This is too short for some of
1313 the long messages that one sometimes sees. I've increased the limit to
1314 1024.
131631. It is now possible to make retry rules that apply only when a message has a
1317 specific sender, in particular, an empty sender.
131932. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1320 it possible to be selective about when SMTP synchronization is enforced.
132233. Added "control = caseful_local_part" and "control = "caselower_local_part".
132432. Implemented hosts_connection_nolog.
132633. Added an ACL for QUIT.
132834. Setting "delay_warning=" to disable warnings was not working; it gave a
1329 syntax error.
133135. Added mailbox_size and mailbox_filecount to appendfile.
133336. Added control = no_multiline_responses to ACLs.
133537. There was a bug in the logic of the code that waits for the clock to tick
1336 in the case where the clock went backwards by a substantial amount such
1337 that the microsecond fraction of "now" was more than the microsecond
1338 fraction of "then" (but the whole seconds number was less).
134038. Added support for the libradius Radius client library this is found on
1341 FreeBSD (previously only the radiusclient library was supported).
1344Exim version 4.42
1347 1. When certain lookups returned multiple values in the form name=value, the
1348 quoting of the values was not always being done properly. Specifically:
1349 (a) If the value started with a double quote, but contained no whitespace,
1350 it was not quoted.
1351 (b) If the value contained whitespace other than a space character (i.e.
1352 tabs or newlines or carriage returns) it was not quoted.
1353 This fix has been applied to the mysql and pgsql lookups by writing a
1354 separate quoting function and calling it from the lookup code. The fix
1355 should probably also be applied to nisplus, ibase and oracle lookups, but
1356 since I cannot test any of those, I have not disturbed their existing code.
1358 2. A hit in the callout cache for a specific address caused a log line with no
1359 reason for rejecting RCPT. Now it says "Previous (cached) callout
1360 verification failure".
1362 3. There was an off-by-one bug in the queryprogram router. An over-long
1363 return line was truncated at 256 instead of 255 characters, thereby
1364 overflowing its buffer with the terminating zero. As well as fixing this, I
1365 have increased the buffer size to 1024 (and made a note to document this).
1367 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1368 when Exim is waiting for an SMTP response from a remote server, Exim
1369 restarts its select() call on the socket, thereby resetting its timeout.
1370 This is not a problem when such interrupts are rare. Somebody set up a cron
1371 job to run exiwhat every 2 minutes, which is less than the normal select()
1372 timeout (5 or 10 minutes). This meant that the select() timeout never
1373 kicked in because it was always reset. I have fixed this by comparing the
1374 time when an interrupt arrives with the time at the start of the first call
1375 to select(). If more time than the timeout has elapsed, the interrupt is
1376 treated as a timeout.
1378 5. Some internal re-factoring in preparation for the addition of Sieve
1379 extensions (by MH). In particular, the "personal" test is moved to a
1380 separate function, and given an option for scanning Cc: and Bcc: (which is
1381 not set for Exim filters).
1383 6. When Exim created an email address using the login of the caller as the
1384 local part (e.g. when creating a From: or Sender: header line), it was not
1385 quoting the local part when it contained special characters such as @.
1387 7. Installed new OpenBSD configuration files.
1389 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1390 try to make them clearer.
1392 9. Callout options, other than the timeout value, were being ignored when
1393 verifying sender addresses in header lines. For example, when using
1395 verify = header_sender/callout=no_cache
1397 the cache was (incorrectly) being used.
139910. Added a missing instance of ${EXE} to the exim_install script; this affects
1400 only the Cygwin environment.
140211. When return_path_on_delivery was set as a log selector, if different remote
1403 addresses in the same message used different return paths and parallel
1404 remote delivery occurred, the wrong values would sometimes be logged.
1405 (Whenever a remote delivery process finished, the return path value from
1406 the most recently started remote delivery process was logged.)
140812. RFC 3848 specifies standard names for the "with" phrase in Received: header
1409 lines when AUTH and/or TLS are in use. This is the "received protocol"
1410 field. Exim used to use "asmtp" for authenticated SMTP, without any
1411 indication (in the protocol name) for TLS use. Now it follows the RFC and
1412 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1413 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1414 names appear in log lines as well as in Received: header lines.
141613. Installed MH's patches for Sieve to add the "copy" and "vacation"
1417 extensions, and comparison tests, and to fix some bugs.
141914. Changes to the "personal" filter test:
1421 (1) The test was buggy in that it was just doing the equivalent of
1422 "contains" tests on header lines. For example, if a user's address was
1423 anne@some.where, the "personal" test would incorrectly be true for
1425 To: susanne@some.where
1427 This test is now done by extracting each address from the header in turn,
1428 and checking the entire address. Other tests that are part of "personal"
1429 are now done using regular expressions (for example, to check local parts
1430 of addresses in From: header lines).
1432 (2) The list of non-personal local parts in From: addresses has been
1433 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1434 taken from the Sieve specification recommendations.
1436 (3) If the message contains any header line starting with "List-" it is
1437 treated as non-personal.
1439 (4) The test for "circular" in the Subject: header line has been removed
1440 because it now seems ill-conceived.
144215. Minor typos in src/EDITME comments corrected.
144416. Installed latest exipick from John Jetmore.
144617. If headers_add on a router specified a text string that was too long for
1447 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1448 of string_sprintf() is now avoided.
145018. $message_body_size was not set (it was always zero) when running the DATA
1451 ACL and the local_scan() function.
145319. For the "mail" command in an Exim filter, no default was being set for
1454 the once_repeat time, causing a random time value to be used if "once" was
1455 specified. (If the value happened to be <= 0, no repeat happened.) The
1456 default is now 0s, meaning "never repeat". The "vacation" command was OK
1457 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1458 (I found it when inspecting the code).
146020. There is now an overall timeout for performing a callout verification. It
1461 defaults to 4 times the callout timeout, which applies to individual SMTP
1462 commands during the callout. The overall timeout applies when there is more
1463 than one host that can be tried. The timeout is checked before trying the
1464 next host. This prevents very long delays if there are a large number of
1465 hosts and all are timing out (e.g. when the network connections are timing
1466 out). The value of the overall timeout can be changed by specifying an
1467 additional sub-option for "callout", called "maxwait". For example:
1469 verify = sender/callout=5s,maxwait=20s
147121. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1472 to the end before writing, but this should make it even safer).
147422. Exim was forgetting that it had advertised PIPELINING for the second and
1475 subsequent messages on an SMTP connection. It was also not resetting its
1476 memory on STARTTLS and an internal HELO.
147823. When Exim logs an SMTP synchronization error within a session, it now
1479 records whether PIPELINING has been advertised or not.
148124. Added 3 instances of "(long int)" casts to time_t variables that were being
1482 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1483 rather than long int.
148525. Installed the latest Cygwin configuration files from the Cygwin maintainer.
148726. Added the never_mail option to autoreply.
1490Exim version 4.41
1493 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1494 crash if the getsockname() call failed; this can happen if a connection is
1495 closed very soon after it is established. The problem was simply in the
1496 order in which certain operations were done, causing Exim to try to write
1497 to the SMTP stream before it had set up the file descriptor. The bug has
1498 been fixed by making things happen in the correct order.
1501Exim version 4.40
1504 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1505 before the connection was closed, thus losing the rejection response.
1507 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1508 some early Solaris releases, but causes trouble in current releases where
1509 socklen_t is defined.
1511 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1512 always exist.
1514 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1515 configured.
1517 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1518 that releasing the top of it at the end releases what was used for sub-
1519 expansions (unless the block got too big). However, discard this block if
1520 the first thing is a variable or header, so that we can use its block when
1521 it is dynamic (useful for very large $message_headers, for example).
1523 6. Lookups now cache *every* query, not just the most recent. A new, separate
1524 store pool is used for this. It can be recovered when all lookup caches are
1525 flushed. Lookups now release memory at the end of their result strings.
1526 This has involved some general refactoring of the lookup sources.
1528 7. Some code has been added to the store_xxx() functions to reduce the amount
1529 of flapping under certain conditions.
1531 8. log_incoming_interface used to affect only the <= reception log lines. Now
1532 it causes the local interface and port to be added to several more SMTP log
1533 lines, for example "SMTP connection from", and rejection lines.
1535 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
153710. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
153911. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1540 could be overwritten at the end of the current message (or the start of a
1541 new message if it was set in a HELO ACL). The value is now preserved for
1542 the duration of the SMTP connection.
154412. If a transport had a headers_rewrite setting, and a matching header line
1545 contained an unqualified address, that address was qualified, even if it
1546 did not match any rewriting rules. The underlying bug was that the values
1547 of the flags that permit the existence of unqualified sender and recipient
1548 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1549 non-local messages, and by -bnq for local messages) were not being
1550 preserved with the message after it was received.
155213. When Exim was logging an SMTP synchronization error, it could sometimes log
1553 "next input=" as part of the text comprising the host identity instead of
1554 the correct text. The code was using the same buffer for two different
1555 strings. However, depending on which order the printing function evaluated
1556 its arguments, the bug did not always show up. Under Linux, for example, my
1557 test suite worked just fine.
155914. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1560 doesn't work with some older versions of Perl. It has been changed to "my",
1561 which in any case is probably the better facility to use.
156315. A really picky compiler found some instances of statements for creating
1564 error messages that either had too many or two few arguments for the format
1565 string.
156716. The size of the buffer for calls to the DNS resolver has been increased
1568 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1569 for addresses that have a lot of PTR records. This alleviates a problem; it
1570 does not fully solve it.
157217. A dnsdb lookup for PTR records that receives more data than will fit in the
1573 buffer now truncates the list and logs the incident, which is the same
1574 action as happens when Exim is looking up a host name and its aliases.
1575 Previously in this situation something unpredictable would happen;
1576 sometimes it was "internal error: store_reset failed".
157818. If a server dropped the connection unexpectedly when an Exim client was
1579 using GnuTLS and trying to read a response, the client delivery process
1580 crashed while trying to generate an error log message.
158219. If a "warn" verb in an ACL added multiple headers to a message in a single
1583 string, for example:
1585 warn message = H1: something\nH2: something
1587 the text was added as a single header line from Exim's point of view
1588 though it ended up OK in the delivered message. However, searching for the
1589 second and subsequent header lines using $h_h2: did not work. This has been
1590 fixed. Similarly, if a system filter added multiple headers in this way,
1591 the routers could not see them.
159320. Expanded the error message when iplsearch is called with an invalid key to
1594 suggest using net-iplsearch in a host list.
159621. When running tests using -bh, any delays imposed by "delay" modifiers in
1597 ACLs are no longer actually imposed (and a message to that effect is
1598 output).
160022. If a "gecos" field in a passwd entry contained escaped characters, in
1601 particular, if it contained a \" sequence, Exim got it wrong when building
1602 a From: or a Sender: header from that name. A second bug also caused
1603 incorrect handling when an unquoted " was present following a character
1604 that needed quoting.
160623. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1607 was not being matched caselessly.
160924. Arranged for all hyphens in the exim.8 source to be escaped with
1610 backslashes.
161225. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1613 properly. Recipient callout cache records were still being keyed to include
1614 the sender, even when use_sender was set false. This led to far more
1615 callouts that were necessary. The sender is no longer included in the key
1616 when use_sender is false.
161826. Added "control = submission" modifier to ACLs.
162027. Added the ${base62d: operator to decode base 62 numbers.
162228. dnsdb lookups can now access SRV records.
162429. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1625 the configuration file.
162730. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1628 (-v) mode. This makes the output for a verbose queue run more intelligible.
163031. Added a use_postmaster feature to recipient callouts.
163232. Added the $body_zerocount variable, containing the number of binary zero
1633 bytes in the message body.
163533. The time of last modification of the "new" subdirectory is now used as the
1636 "mailbox time last read" when there is a quota error for a maildir
1637 delivery.
163934. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
164135. Added +ignore_unknown as a special item in host lists.
164336. Code for decoding IPv6 addresses in host lists is now included, even if
1644 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1645 address was recognized as an IP address, but was then not correctly decoded
1646 into binary, causing unexpected and incorrect effects when compared with
1647 another IP address.
1650Exim version 4.34
1653 1. Very minor rewording of debugging text in manualroute to say "list of
1654 hosts" instead of "hostlist".
1656 2. If verify=header_syntax was set, and a header line with an unqualified
1657 address (no domain) and a large number of spaces between the end of the
1658 name and the colon was received, the reception process suffered a buffer
1659 overflow, and (when I tested it) crashed. This was caused by some obsolete
1660 code that should have been removed. The fix is to remove it!
1662 3. When running in the test harness, delay a bit after writing a bounce
1663 message to get a bit more predictability in the log output.
1665 4. Added a call to search_tidyup() just before forking a reception process. In
1666 theory, someone could use a lookup in the expansion of smtp_accept_max_
1667 per_host which, without the tidyup, could leave open a database connection.
1669 5. Added the variables $recipient_data and $sender_data which get set from a
1670 lookup success in an ACL "recipients" or "senders" condition, or a router
1671 "senders" option, similar to $domain_data and $local_part_data.
1673 6. Moved the writing of debug_print from before to after the "senders" test
1674 for routers.
1676 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1677 problems for message scanning, either using a data ACL, or using
1678 local_scan() because the Received: header was not generated till after they
1679 were called (in order to set the time as the time of reception completion).
1680 I have revised the way this works. The header is now generated after the
1681 body is received, but before the ACL or local_scan() are called. After they
1682 are run, the timestamp in the header is updated.
1685Exim version 4.33
1688 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1689 before starting a queue runner without re-exec. This happened only when
1690 deliver_drop_privilege was set or when the Exim user was set to root. The
1691 effect of the bug was that timeouts during subsequent deliveries caused
1692 crashes instead of being properly handled. The handler is now left at its
1693 default (and expected) setting.
1695 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1696 message, again when deliver_drop_privilege is set or Exim is run as root.
1697 The bug described in (1) was not present in this case, but the tidying up
1698 of the other signals was missing. I have made the two cases consistent.
1700 3. The ignore_target_hosts setting on a manualroute router was being ignored
1701 for hosts that were looked up using the /MX notation.
1703 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1704 in domain lists.
1706 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1707 operated on the sender address. After changing the $sender_address to <>
1708 for the sender address verify, Exim was re-instated it as the original
1709 (before rewriting) address, but remembering that it had rewritten it, so it
1710 wasn't rewriting it again. This bug also had the effect of breaking the
1711 sender address verification caching when the sender address was rewritten.
1713 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1714 This has been changed so that if the ip literal address matches
1715 ignore_target_hosts, the router declines.
1717 7. Added expansion conditions match_domain, match_address, and match_local_
1718 part (NOT match_host).
1720 8. The placeholder for the Received: header didn't have a length field set.
1722 9. Added code to Exim itself and to exim_lock to test for a specific race
1723 condition that could lead to file corruption when using MBX delivery. The
1724 issue is with the lockfile that is created in /tmp. If this file is removed
1725 after a process has opened it but before that process has acquired a lock,
1726 there is the potential for a second process to recreate the file and also
1727 acquire a lock. This could lead to two Exim processes writing to the file
1728 at the same time. The added code performs the same test as UW imapd; it
1729 checks after acquiring the lock that its file descriptor still refers to
1730 the same named file.
173210. The buffer for building added header lines was of fixed size, 8192 bytes.
1733 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1734 when Exim is built.
173611. Added the smtp_active_hostname option. If used, this will typically be made
1737 to depend on the incoming interface address. Because $interface_address is
1738 not set up until the daemon has forked a reception process, error responses
1739 that can happen earlier (such as "too many connections") no longer contain
1740 a host name.
174212. If an expansion in a condition on a "warn" statement fails because a lookup
1743 defers, the "warn" statement is abandoned, and the next ACL statement is
1744 processed. Previously this caused the whole ACL to be aborted.
174613. Added the iplsearch lookup type.
174814. Added ident_timeout as a log selector.
175015. Added tls_certificate_verified as a log selector.
175216. Added a global option tls_require_ciphers (compare the smtp transport
1753 option of the same name). This controls incoming TLS connections.
175517. I finally figured out how to make tls_require_ciphers do a similar thing
1756 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1757 before starting the TLS session.
175918. Tabs are now shown as \t in -bP output.
176119. If the log selector return_path_on_delivery was set, Exim crashed when
1762 bouncing a message because it had too many Received: header lines.
176420. If two routers both had headers_remove settings, and the first one included
1765 a superfluous trailing colon, the final name in the first list and the
1766 first name in the second list were incorrectly joined into one item (with a
1767 colon in the middle).
1770Exim version 4.32
1773 1. Added -C and -D options to the exinext utility, mainly to make it easier
1774 to include in the automated testing, but these could be helpful when
1775 multiple configurations are in use.
1777 2. The exinext utility was not formatting the output nicely when there was
1778 an alternate port involved in the retry record key, nor when there was a
1779 message id as well (for retries that were specific to a specific message
1780 and a specific host). It was also confused by IPv6 addresses, because of
1781 the additional colons they contain. I have fixed the IPv4 problem, and
1782 patched it up to do a reasonable job for IPv6.
1784 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1785 delivery, the log line now contains "pipelined" if PIPELINING was used.
1787 4. An SMTP transport process used to panic and die if the bind() call to set
1788 an explicit outgoing interface failed. This has been changed; it is now
1789 treated in the same way as a connect() failure.
1791 5. A reference to $sender_host_name in the part of a conditional expansion
1792 that was being skipped was still causing a DNS lookup. This no longer
1793 occurs.
1795 6. The def: expansion condition was not recognizing references to header lines
1796 that used bh_ and bheader_.
1798 7. Added the _cache feature to named lists.
1800 8. The code for checking quota_filecount in the appendfile transport was
1801 allowing one more file than it should have been.
1803 9. For compatibility with Sendmail, the command line option
1805 -prval:sval
1807 is equivalent to
1809 -oMr rval -oMs sval
1811 and sets the incoming protocol and host name (for trusted callers). The
1812 host name and its colon can be omitted when only the protocol is to be set.
1813 Note the Exim already has two private options, -pd and -ps, that refer to
1814 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1815 "s", but I don't think that's a major issue.
181710. A number of refactoring changes to the code, none of which should affect
1818 Exim's behaviour:
1820 (a) The number of logging options was getting close to filling up the
1821 32-bit word that was used as a bit map. I have split them into two classes:
1822 those that are passed in the argument to log_write(), and those that are
1823 only ever tested independently outside of that function. These are now in
1824 separate 32-bit words, so there is plenty of room for expansion again.
1825 There is no change in the user interface or the logging behaviour.
1827 (b) When building, for example, log lines, the code previously used a
1828 macro that called string_cat() twice, in order to add two strings. This is
1829 not really sufficiently general. Furthermore, there was one instance where
1830 it was actually wrong because one of the argument was used twice, and in
1831 one call a function was used. (As it happened, calling the function twice
1832 did not affect the overall behaviour.) The macro has been replaced by a
1833 function that can join an arbitrary number of extra strings onto a growing
1834 string.
1836 (c) The code for expansion conditions now uses a table and a binary chop
1837 instead of a serial search (which was left over from when there were very
1838 few conditions). Also, it now recognizes conditions like "pam" even when
1839 the relevant support is not compiled in: a suitably worded error message is
1840 given if an attempt is made to use such a condition.
184211. Added ${time_interval:xxxxx}.
184412. A bug was causing one of the ddress fields not to be passed back correctly
1845 from remote delivery subprocesses. The field in question was not being
1846 subsequently used, so this caused to problems in practice.
184813. Added new log selectors queue_time and deliver_time.
185014. Might have fixed a bug in maildirsizefile handling that threw up
1851 "unexpected character" debug warnings, and recalculated the data
1852 unnecessarily. In any case, I expanded the warning message to give more
1853 information.
185515. Added the message "Restricted characters in address" to the statements in
1856 the default ACL that block characters like @ and % in local parts.
185816. Change 71 for release 4.31 proved to be much less benign that I imagined.
1859 Three changes have been made:
1861 (a) There was a serious bug; a negative response to MAIL caused the whole
1862 recipient domain to be cached as invalid, thereby blocking all messages
1863 to all local parts at the same domain, from all senders. This bug has
1864 been fixed. The domain is no longer cached after a negative response to
1865 MAIL if the sender used is not empty.
1867 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1868 been restored.
1870 (c) A new callout option, "use_sender" has been added for people who want
1871 the modified behaviour.
1874Exim version 4.31
1877 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1878 Larry Rosenman.
1880 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1881 indeed breaks things for older releases.
1883 3. Added additional logging to the case where there is a problem reading data
1884 from a filter that is running in a subprocess using a pipe, in order to
1885 try to track down a specific problem.
1887 4. Testing facility fudge: when running in the test harness and attempting
1888 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1889 getting "No route to host". Convert this to a timeout.
1891 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1892 warning.
1894 6. Some OS don't have socklen_t but use size_t instead. This affects the
1895 fifth argument of getsockopt() amongst other things. This is now
1896 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1897 can be set for individual OS. I have set it for SunOS5, OSF1, and
1898 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1899 some earlier ones do not.
1901 7. Change 4.30/15 was not doing the test caselessly.
1903 8. The standard form for an IPv6 address literal was being rejected by address
1904 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1905 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1906 this, as well as the form without the "IPv6" on the front (but only when
1907 address literals are enabled, of course).
1909 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
191110. Exim crashed if a message with an empty sender address specified by -f
1912 encountered a router with an errors_to setting. This could be provoked only
1913 by a command such as
1915 exim -f "" ...
1917 where an empty string was supplied; "<>" did not hit this bug.
191911. Installed PCRE release 4.5.
192112. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1922 remained set. It is now erased.
192413. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1925 times from message ids (which are base 36 rather than the normal 62).
192714. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1928 were being counted as actual protocol errors, and logged if the log
1929 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1930 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1931 and DATA following a set of rejected RCPTs do not count as protocol errors.
1932 In other words, Exim assumes they were pipelined, though this may not
1933 actually be the case. Of course, in all cases the client gets an
1934 appropriate error code.
193615. If a lookup fails in an ACL condition, a message about the failure may
1937 be available; it is used if testing the ACL cannot continue, because most
1938 such messages specify what the cause of the deferral is. However, some
1939 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1940 that caused an old message to be retained and used if a later statement
1941 caused a defer, replacing the real cause of the deferral.
194316. If an IP address had so many PTR records that the DNS lookup buffer
1944 was not large enough to hold them, Exim could crash while trying to process
1945 the truncated data. It now detects and logs this case.
194717. Further to 4.21/58, another change has been made: if (and only if) the
1948 first line of a message (the first header line) ends with CRLF, a bare LF
1949 in a subsequent header line has a space inserted after it, so as not to
1950 terminate the header.
195218. Refactoring: tidied an ugly bit of code in appendfile that copied data
1953 unnecessarily, used atoi() instead of strtol(), and didn't check the
1954 termination when getting file sizes from file names by regex.
195619. Completely re-implemented the support for maildirsize files, in the light
1957 of a number of problems with the previous contributed implementation
1958 (4.30/29). In particular:
1960 . If the quota is zero, the maildirsize file is maintained, but no quota is
1961 imposed.
1963 . If the maildir directory does not exist, it is created before any attempt
1964 to write a maildirsize file.
1966 . The quota value in the file is just a cache; if the quota is changed in
1967 the transport, the new value overrides.
1969 . A regular expression is available for excluding directories from the
1970 count.
197220. The autoreply transport checks the characters in options that define the
1973 message's headers; it allows continued headers, but it was checking with
1974 isspace() after an embedded newline instead of explicitly looking for a
1975 space or a tab.
197721. If all the "regular" hosts to which an address was routed had passed their
1978 expiry times, and had not reached their retry times, the address was
1979 bounced, even if fallback hosts were defined. Now Exim should go on to try
1980 the fallback hosts.
198222. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1983 equivalent code in the SMTP transport. Some hosts send humungous responses
1984 to HELO/EHLO, more than 1024 it seems.
198623. Refactoring: code in filter.c used (void *) for "any old type" but this
1987 gives compiler warnings in some environments. I've now done it "properly",
1988 using a union.
199024. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1991 (because of problems with the built-in one) was declared to return uschar *
1992 instead of char *, causing compiler failure.
199425. Fixed a file descriptor leak when processing alias/forward files.
199626. Fixed a minor format string issue in dbfn.c.
199827. Typo in exim.c: ("dmbnz" for "dbmnz").
200028. If a filter file refered to $h_xxx or $message_headers, and the headers
2001 contained RFC 2047 "words", Exim's memory could, under certain conditions,
2002 become corrupted.
200429. When a sender address is verified, it is cached, to save repeating the test
2005 when there is more than one recipient in a message. However, when the
2006 verification involves a callout, it is possible for different callout
2007 options to be set for different recipients. It is too complicated to keep
2008 track of this in the cache, so now Exim always runs a verification when a
2009 callout is required, relying on the callout cache for the optimization.
2010 The overhead is duplication of the address routing, but this should not be
2011 too great.
201330. Fixed a bug in callout caching. If a RCPT command caused the sender address
2014 to be verified with callout=postmaster, and the main callout worked but the
2015 postmaster check failed, the verification correctly failed. However, if a
2016 subsequent RCPT command asked for sender verification *without* the
2017 postmaster check, incorrect caching caused this verification also to fail,
2018 incorrectly.
202031. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
2021 it was not caching the DNS options (qualify_single, search_parents) that
2022 were used when the lookup failed. A subsequent lookup with different
2023 options therefore always gave the same answer, though there were cases
2024 where it should not have. (Example: a "domains = !$mx_any" option on a
2025 dnslookup router: the "domains" option is always processed without any
2026 widening, but the router might have qualify_single set.) Now Exim uses the
2027 cached value only when the same options are set.
202932. Added John Jetmore's "exipick" utility to the distribution.
203133. GnuTLS: When an attempt to start a TLS session fails for any reason other
2032 than a timeout (e.g. a certificate is required, and is not provided), an
2033 Exim server now closes the connection immediately. Previously it waited for
2034 the client to close - but if the client is SSL, it seems that they each
2035 wait for each other, leading to a delay before one of them times out.
203734: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
2038 maintained 0.8.x compatibility because I don't think many are using it, and
2039 it is clearly obsolete.
204135. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2042 transport.
204436. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2045 client certificate was expired. A simple patch fixes this, though I don't
2046 understand the full logic of why the verify callback is called multiple
2047 times.
204937. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2050 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2051 which causes problems with some clients (such as the Certicom SSL Plus
2052 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2053 disables the coutermeasure allowing Eudora to connect."
205538. Exim was not checking that a write() to a log file succeeded. This could
2056 lead to Bad Things if a log got too big, in particular if it hit a file
2057 size limit. Exim now panics and dies if it cannot write to a log file, just
2058 as it does if it cannot open a log file.
206039. Modified OS/Makefile-Linux so that it now contains
2064 The two -D definitions ensure that Exim is compiled with large file
2065 support, which makes it possible to handle log files that are bigger than
2066 2^31.
206840. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2069 instance) a domain was checked against a named list that involved a lookup,
2070 causing $domain_data to be set, then another domain was checked against the
2071 same list, then the first domain was re-checked, the value of $domain_data
2072 after the final check could be wrong. In particular, if the second check
2073 failed, it could be set empty. This bug probably also applied to
2074 $localpart_data.
207641. The strip_trailing_dot option was not being applied to the address given
2077 with the -f command-line option.
207942. The code for reading a message's header from the spool was incrementing
2080 $received_count, but never initializing it. This meant that the value was
2081 incorrect (doubled) while delivering a message in the same process in which
2082 it was received. In the most common configuration of Exim, this never
2083 happens - a fresh exec is done - but it can happen when
2084 deliver_drop_privilege is set.
208643. When Exim logs an SMTP synchronization error - client data sent too soon -
2087 it now includes up to 150 characters of the unexpected data in the log
2088 line.
209044. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2091 and building data strings. The size of both of these buffers was 10 000
2092 bytes - far larger than anybody would *ever* want, thought I. Needless to
2093 say, somebody hit the limit. I have increased the maximum line length to
2094 20 000 and the maximum data length of concatenated lines to 100 000. I have
2095 also fixed two bugs, because there was no checking on these buffers. Tsk,
2096 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2097 buffer is too small.
209945. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2100 lsearch lookups. Now it does.
210246. When parsing a route_list item in a manualroute router, a fixed-length
2103 buffer was used for the list of hosts. I made this 1024 bytes long,
2104 thinking that nobody would ever have a list of hosts that long. Wrong.
2105 Somebody had a whole pile of complicated expansion conditions, and the
2106 string was silently truncated, leading to an expansion error. It turns out
2107 that it is easier to change to an unlimited length (owing to other changes
2108 that have happened since this code was originally written) than to build
2109 structure for giving a limitation error. The length of the item that
2110 expands into the list of hosts is now unlimited.
211247. The lsearch lookup could not handle data where the length of text line was
2113 more than 4095 characters. Such lines were truncated, leading to shortened
2114 data being returned. It should now handle lines of any length.
211648. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2117 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2118 ACL").
212049. Cosmetic tidy to scripts like exicyclog that are generated by globally
2121 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2122 no longer happens in comment lines. A list of replacements is now placed
2123 at the head of all of the source files, except those whose only change is
2124 to replace PERL_COMMAND in the very first #! line.
212650. Replaced the slow insertion sort in queue.c, for sorting the list of
2127 messages on the queue, with a bottom-up merge sort, using code contributed
2128 by Michael Haardt. This should make operations like -bp somewhat faster on
2129 large queues. It won't affect queue runners, except when queue_run_in_order
2130 is set.
213251. Installed eximstats 1.31 in the distribution.
213452. Added support for SRV lookups to the dnslookup router.
213653. If an ACL referred to $message_body or $message_body_end, the value was not
2137 reset for any messages that followed in the same SMTP session.
213954. The store-handling optimization for building very long strings was not
2140 differentiating between the different store pools. I don't think this
2141 actually made any difference in practice, but I've tidied it.
214355. While running the routers to verify a sender address, $sender_address
2144 was still set to the sender address. This is wrong, because when routing to
2145 send a bounce to the sender, it would be empty. Therefore, I have changed
2146 it so that, while verifying a sender address, $sender_address is set to <>.
2147 (There is no change to what happens when verifying a recipient address.)
214956. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2150 target A or AAAA records (if not already returned) without resetting the
2151 qualify_single or search_parents options of the DNS resolver. These are
2152 inappropriate in this case because the targets of MX and SRV records must
2153 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2154 target that, when qualified, matched something in the local domain. These
2155 two options are now turned off when doing these lookups.
215757. It seems that at least some releases of Reiserfs (which does not have the
2158 concept of a fixed number of inodes) returns zero and not -1 for the
2159 number of available inodes. This interacted badly with check_spool_inodes,
2160 which assumed that -1 was the "no such thing" setting. What I have done is
2161 to check that the total number of inodes is greater than zero before doing
2162 the test of how many are available.
216458. When a "warn" ACL statement has a log_message modifier, the message is
2165 remembered, and not repeated. This is to avoid a lot of repetition when a
2166 message has many recipients that cause the same warning to be written.
2167 Howewer, Exim was preserving the list of already written lines for an
2168 entire SMTP session, which doesn't seem right. The memory is now reset if a
2169 new message is started.
217159. The "rewrite" debugging flag was not showing the result of rewriting in the
2172 debugging output unless log_rewrite was also set.
217460. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2175 of (int)(handle) when we know that handle contains (void *)(-1).
217761. The Exim daemon panic-logs an error return when it closes the incoming
2178 connection. However "connection reset by peer" seems to be common, and
2179 isn't really an error worthy of noting specially, so that particular error
2180 is no long logged.
218262. When Exim is trying to find all the local interfaces, it used to panic and
2183 die if the ioctl to get the interface flags failed. However, it seems that
2184 on at least one OS (Solaris 9) it is possible to have an interface that is
2185 included in the list of interfaces, but for which you get a failure error
2186 for this call. This happens when the interface is not "plumbed" into a
2187 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2188 failure of the "get flags" call assumes that the interface is down.
219063. Added a ${eval10: operator, which assumes all numbers are decimal. This
2191 makes life easier for people who are doing arithmetic on fields extracted
2192 from dates, where you often get leading zeros that should not be
2193 interpreted as octal.
219564. Added qualify_domain to the redirect router, to override the global
2196 setting.
219865. If a pathologically long header line contained very many addresses (the
2199 report of this problem mentioned 10 000) and each of them was rewritten,
2200 Exim could use up a very large amount of memory. (It kept on making new
2201 copies of the header line as it rewrote, and never released the old ones.)
2202 At the expense of a bit more processing, the header rewriting function has
2203 been changed so that it no longer eats memory in this way.
220566. The generation of the Received: header has been moved from the time that a
2206 message starts to be received, to the time that it finishes. The timestamp
2207 in the Received: header should now be very close to that of the <= log
2208 line. There are two side-effects of this change:
2210 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2211 logged header lines no longer include the local Received: line, because
2212 it has not yet been created. The same applies to a copy of the message
2213 that is returned to a non-SMTP sender when a message is rejected.
2215 (b) When a filter file is tested using -bf, no additional Received: header
2216 is added to the test message. After some thought, I decided that this
2217 is a bug fix.
2219 This change does not affect the value of $received_for. It is still set
2220 after address rewriting, but before local_scan() is called.
222267. Installed the latest Cygwin-specific files from the Cygwin maintainer.
222468. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2225 gave an unhelpful panic error message, and a defer error. I have managed to
2226 change this behaviour so that it now rejects any supplied certificate,
2227 which seems right, as the list of acceptable certificates is empty.
222969. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2230 gave an unhelpful defer error. I have not managed to make this reject any
2231 supplied certificates, but the error message it gives is "no certificate
2232 supplied", which is not helpful.
223470. exigrep's output now also includes lines that are not associated with any
2235 message, but which match the given pattern. Implemented by a patch from
2236 Martin Sluka, which also tidied up the Perl a bit.
223871. Recipient callout verification, like sender verification, was using <> in
2239 the MAIL FROM command. This isn't really the right thing, since the actual
2240 sender may affect whether the remote host accepts the recipient or not. I
2241 have changed it to use the actual sender in the callout; this means that
2242 the cache record is now keyed on a recipient/sender pair, not just the
2243 recipient address. There doesn't seem to be a real danger of callout loops,
2244 since a callout by the remote host to check the sender would use <>.
2245 [SEE ABOVE: changed after hitting problems.]
224772. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2248 temporary errors. However, in the case of such a code being given after
2249 the end of a data transmission (i.e. after ".") Exim was failing to write
2250 a retry record for the message. (Yes, there was some broken host that was
2251 actually sending 8xx at this point.)
225373. An unknown lookup type in a host list could cause Exim to panic-die when
2254 the list was checked. (An example that provoked this was putting <; in the
2255 middle of a list instead of at the start.) If this happened during a DATA
2256 ACL check, a -D file could be left lying around. This kind of configuration
2257 error no longer causes Exim to die; instead it causes a defer errror. The
2258 incident is still logged to the main and panic logs.
226074. Buglet left over from Exim 3 conversion. The message "too many messages
2261 in one connection" was written to the rejectlog but not the mainlog, except
2262 when address rewriting (yes!) was being logged.
226475. Added write_rejectlog option.
226676. When a system filter was run not as root (that is, when system_filter_user
2267 was set), the values of the $n variables were not being returned to the
2268 main process; thus, they were not subsequently available in the $sn
2269 variables.
227177. Added +return_path_on_delivery log selector.
227378. A connection timeout was being treated differently from recipients deferred
2274 when testing hosts_max_try with a message that was older than the host's
2275 retry timeout. (The host should not be counted, thus allowing all hosts to
2276 be tried at least once before bouncing.) This may have been the cause of an
2277 occasionally reported bug whereby a message would remain on the queue
2278 longer than the retry timeout, but would be bounced if a delivery was
2279 forced. I say "may" because I never totally pinned down the problem;
2280 setting up timeout/retry tests is difficult. See also the next item.
228279. The ultimate address timeout was not being applied to errors that involved
2283 a combination of host plus message (for example, a timeout on a MAIL
2284 command). When an address resolved to a number of possible hosts, and they
2285 were not all tried for each delivery (e.g. because of hosts_max_try), a
2286 message could remain on the queue longer than the retry timeout.
228880. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2289 Haardt.
229181. Fixed an obscure SMTP outgoing bug which required at least the following
2292 conditions: (a) there was another message waiting for the same server;
2293 (b) the server returned 5xx to all RCPT commands in the first message so
2294 that the message was not completed; (c) the server dropped the connection
2295 or gave a negative response to the RSET that Exim sends to abort the
2296 transaction. The observed case was a dropped connection after DATA that had
2297 been sent in pipelining mode. That is, the server had advertised PIPELINING
2298 but was not implementing it correctly. The effect of the bug was incorrect
2299 behaviour, such as trying another host, and this could lead to a crash.
2302Exim version 4.30
2305 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2306 and daemon.c were passed as pointers to ints; they should have been
2307 pointers to socklen_t variables (which are typically unsigned ints).
2309 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2310 fixed.
2312 3. Fixed a really odd bug that affected only the testing scheme; patching a
2313 certain fixed string in the binary changed the value of another string that
2314 happened to be identical to the end of the original first string.
2316 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2317 name", it returns that address as the IP address. On some operating
2318 systems (e.g. Solaris), it also passes back the IP address string as the
2319 "host name". However, on others (e.g. Linux), it passes back an empty
2320 string. Exim wasn't checking for this, and was changing the host name to an
2321 empty string, assuming it had been canonicized.
2323 5. Although rare, it is permitted to have more than one PTR record for a given
2324 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2325 all the names associated with an address, because they do in Solaris.
2326 However, it seems that they do not in Linux for data that comes from the
2327 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2328 I found this out when I moved to a new Linux workstation and tried to run
2329 the Exim test suite.
2331 To get round this problem I have changed the code so that it now does its
2332 own call to the DNS to look up PTR records when searching for a host name.
2333 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2334 addresses that are only in /etc/hosts are still found.
2336 This behaviour is, however, controlled by an option called host_lookup_
2337 order, which defaults to "bydns:byaddr". If people want to use the other
2338 order, or indeed, just use one or the other means of lookup, they can
2339 specify it in this variable.
2341 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2342 some operating systems, this comes back from gethostbyaddr() as an empty
2343 string, and this is what Exim used to test for. However, it seems that in
2344 other systems, "." is yielded. Exim now tests for this case too.
2346 7. The values of check_spool_space and check_log_space are now held internally
2347 as a number of kilobytes instead of an absolute number of bytes. If a
2348 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2349 kilobyte. This means that much larger values can be stored.
2351 8. Exim monitor: an attempt to get the action menu when not actually pointing
2352 at a message produces an empty menu entitled "No message selected". This
2353 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2354 no entries in it ("Shell widget menu has zero width and/or height"). So I
2355 have added a single, blank menu entry in this case.
2357 9. Added ${quote_local_part.
235910. MIME decoding is now applied to the contents of Subject: header lines when
2360 they are logged.
236211. Now that a reference to $sender_host_address automatically causes a reverse
2363 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2364 host lookup before query-style lookups in lists that might use this
2365 variable. This has therefore been abolished, and the "net-" prefix is no
2366 longer necessary for query-style lookups.
236812. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2369 have been a typo for LFLAGS, so it has been changed.
237113. The install script calls Exim with "-C /dev/null" in order to find the
2372 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2373 to be output. Howeve, since Exim outputs its version number before the
2374 error, it didn't break the script. It just looked ugly. I fixed this by
2375 always allowing "-C /dev/null" if the caller is root.
237714. Ignore overlarge ACL variable number when reading spool file - insurance
2378 against a later release with more variables having written the file.
238015. The standard form for an IPv6 address literal was being rejected by EHLO.
2381 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2382 this, as well as the form without the "IPv6" on the front.
238416. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2385 OS/Makefile-Darwin file.
238717. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2388 only to LDAP libraries that do not have LDAP_OPT_DEREF.
239018. After change 4.21/52, "%ld" was used to format the contents of the $inode
2391 variable. However, some OS use ints for inodes. I've added cast to long int
2392 to get rid of the compiler warning.
239419. I had forgotten to lock out "/../" in configuration file names when
2395 ALT_CONFIG_PREFIX was set.
239720. Routers used for verification do not need to specify transports. However,
2398 if such a router generated a host list, and callout was configured, Exim
2399 crashed, because it could not find a port number from the (non-existent)
2400 transport. It now assumes port 25 in this circumstance.
240221. Added the -t option to exigrep.
240422. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2405 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2406 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2407 them is set, LOOKUP_LSEARCH is forced.
240923. "exim -bV" now outputs a list of lookups that are included in the binary.
241124. Added sender and host information to the "rejected by local_scan()" log
2412 line; previously there was no indication of these.
241425. Added .include_if_exists.
241626. Change 3.952/11 added an explicit directory sync on top of a file sync for
2417 Linux. It turns out that not all file systems support this. Apparently some
2418 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2419 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2420 not supported on the file descriptor, is now ignored when Exim is trying to
2421 sync a directory. This applies only to Linux.
242327. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
242528. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2426 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2427 this.
242929. Added support for maildirsize files from supplied patch (modified a bit).
243130. The use of :fail: followed by an empty string could lead Exim to respond to
2432 sender verification failures with (e.g.):
2434 550 Verification failed for <xxx>
2435 550 Sender verify failed
2437 where the first response line was missing the '-' that indicates it is not
2438 the final line of the response.
244031. The loop for finding the name of the user that called Exim had a hardwired
2441 limit of 10; it now uses the value of finduser_retries, which is used for
2442 all other user lookups.
244432. Added $received_count variable, available in data and not_smtp ACLs, and at
2445 delivery time.
244733. Exim was neglecting to zero errno before one call of strtol() when
2448 expanding a string and expecting an integer value. On some systems this
2449 resulted in spurious "integer overflow" errors. Also, it was casting the
2450 result into an int without checking.
245234. Testing for a connection timeout using "timeout_connect" in the retry rules
2453 did not work. The code looks as if it has *never* worked, though it appears
2454 to have been documented since at least releast 1.62. I have made it work.
245635. The "timeout_DNS" error in retry rules, also documented since at least
2457 1.62, also never worked. As it isn't clear exactly what this means, and
2458 clearly it isn't a major issue, I have abolished the feature by treating it
2459 as "timeout", and writing a warning to the main and panic logs.
246136. The display of retry rules for -brt wasn't always showing the error code
2462 correctly.
246437. Added new error conditions to retry rules: timeout_A, timeout_MX,
2465 timeout_connect_A, timeout_connect_MX.
246738. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2468 to the empty sender.
247039. The daemon was not analysing the content of -oX till after it had closed
2471 stderr and disconnected from the controlling terminal. This meant that any
2472 syntax errors were only noted on the panic log, and the return code from
2473 the command was 0. By re-arranging the code a little, I've made the
2474 decoding happen first, so such errors now appear on stderr, and the return
2475 code is 1. However, the actual setting up of the sockets still happens in
2476 the disconnected process, so errors there are still only recorded on the
2477 panic log.
247940. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2480 connections (as happens on some IP stacks) was logged at start up time as
2481 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2482 it from "IPv6 and IPv4", which means that two separate sockets are being
2483 used.
248541. The debug output for gethostbyname2() or getipnodebyname() failures now
2486 says whether AF_INET or AF_INET6 was passed as an argument.
248842. Exiwhat output was messed up when time zones were included in log
2489 timestamps.
249143. Exiwhat now gives more information about the daemon's listening ports,
2492 and whether -tls-on-connect was used.
249444. The "port" option of the smtp transport is now expanded.
249645. A "message" modifier in a "warn" statement in a non-message ACL was being
2497 silently ignored. Now an error message is written to the main and panic
2498 logs.
250046. There's a new ACL modifier called "logwrite" which writes to a log file
2501 as soon as it is encountered.
250347. Added $local_user_uid and $local_user_gid at routing time.
250548. Exim crashed when trying to verify a sender address that was being
2506 rewritten to "<>".
250849. Exim was recognizing only a space character after ".include". It now also
2509 recognizes a tab character.
251150. Fixed several bugs in the Perl script that creates the exim.8 man page by
2512 extracting the relevant information from the specification. The man page no
2513 longer contains scrambled data for the -d option, and I've added a section
2514 at the front about calling Exim under different names.
251651. Added "extra_headers" argument to the "mail" command in filter files.
251852. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2519 crash.
252153. Installed eximstats 1.29.
252354. Added transport_filter_timeout as a generic transport option.
252555. Exim no longer adds an empty Bcc: header to messages that have no To: or
2526 Cc: header lines. This was required by RFC 822, but it not required by RFC
2527 2822.
252956. Exim used to add From:, Date:, and Message-Id: header lines to any
2530 incoming messages that did not have them. Now it does so only if the
2531 message originates locally, that is, if there is no associated remote host
2532 address. When Resent- header lines are present, this applies to the Resent-
2533 lines rather than the non-Resent- lines.
253557. Drop incoming SMTP connection after too many syntax or protocol errors. The
2536 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
253858. Messages for configuration errors now include the name of the main
2539 configuration file - useful now that there may be more than one file in a
2540 list (.included file names were always shown).
254259. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2543 for those rare installations that do not start the daemon as root or run it
2544 setuid root. I've cut out the call to initgroups() if the daemon is not
2545 root at that time.
254760. The Exim user and group can now be bound into the binary as text strings
2548 that are looked up at the start of Exim's processing.
255061. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
255262. Added $mailstore_basename variable.
255463. Installed patch to sieve.c from Michael Haardt.
255664. When Exim failed to open the panic log after failing to open the main log,
2557 the original message it was trying to log was written to stderr and debug
2558 output, but if they were not available (the usual case in production), it
2559 was lost. Now it is written to syslog before the two lines that record the
2560 failures to open the logs.
256265. Users' Exim filters run in subprocesses under the user's uid. It is
2563 possible for a "deliver" command or an alias in a "personal" command to
2564 provoke an address rewrite. If logging of address rewriting is configured,
2565 this fails because the process is not running as root or exim. There may be
2566 a better way of dealing with this, but for the moment (because 4.30 needs
2567 to be released), I have disabled address rewrite logging when running a
2568 filter in a non-root, non-exim process.
2571Exim version 4.24
2574 1. The buildconfig auxiliary program wasn't quoting the value set for
2575 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2576 not defined. This bug was masked in 4.22 by the effect that was fixed in
2577 change 4.23/1.
2579 2. Some messages that were rejected after a message id was allocated were
2580 shown as "incomplete" by exigrep. It no longer does this for messages that
2581 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2583 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2584 have allow_domain_literals set, the ID did not get logged in the <= line.
2585 Domain literals are now always recognized in Message-ID: header lines.
2587 4. The first argument for a ${extract expansion item is the key name or field
2588 number. Leading and trailing spaces in this item were not being ignored,
2589 causing some misleading effects.
2591 5. When deliver_drop_privilege was set, single queue runner processes started
2592 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2593 same command in the process it spins off) were not dropping privilege.
2595 6. When the daemon running as "exim" started a queue runner, it always
2596 re-executed Exim in the spun-off process. This is a waste of effort when
2597 deliver_drop_privilege is set. The new process now just calls the
2598 queue-runner function directly.
2601Exim version 4.23
2604 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2607 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2608 ignored. Though the use of -oP was forcing the writing of a pid file, it
2609 was always written to the default place.
2611 3. If the message "no IP address found for host xxxx" is generated during
2612 incoming verification, it is now followed by identification of the incoming
2613 connection (so you can more easily find what provoked it).
2615 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2617 5. Added some features to "harden" Exim a bit more against certain attacks:
2619 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2620 be put in Local/Makefile. This is like the never_users runtime option,
2621 but it cannot be overridden. The default setting is "root".
2623 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2624 prefix string with which any file named in a -C command line option
2625 must start.
2627 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2628 is retained for -C and -D only if the caller of Exim is root. Without
2629 it, the exim user may also use -C and -D and retain privilege.
2631 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2632 command line option is disabled.
2634 6. Macro names set by the -D option must start with an upper case letter, just
2635 like macro names defined in the configuration file.
2637 7. Added "dereference=" facility to LDAP.
2639 8. Two instances of the typo "uknown" in the source files are fixed.
2641 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2642 the Configure-Makefile script screwed up while processing it.
264410. Incorporated PCRE 4.4.
264611. The SMTP synchronization check was not operating right at the start of an
2647 SMTP session. For example, it could not catch a HELO sent before the client
2648 waited for the greeting. There is now a check for outstanding input at the
2649 point when the greeting is written. Because of the duplex, asynchronous
2650 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2651 way, but not yet received, when the check is performed.
265312. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2654 on TCP/IP sockets, because this apparently causes some broken clients to
2655 timeout.
265713. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2658 unchanged) from the Cygwin maintainer.
266014. The code for -bV that shows what is in the binary showed "mbx" when maildir
2661 was supported instead of testing for mbx. Effectively a typo.
266315. The spa authenticator server code was not checking that the input it
2664 received was valid base64.
266616. The debug output line for the "set" modifier in ACLs was not showing the
2667 name of the variable that was being set.
266917. Code tidy: the variable type "vtype_string" was never used. Removed it.
267118. Previously, a reference to $sender_host_name did not cause a DNS reverse
2672 lookup on its own. Something else was needed to trigger the lookup. For
2673 example, a match in host_lookup or the need for a host name in a host list.
2674 Now, if $sender_host_name is referenced and the host name has not yet been
2675 looked up, a lookup is performed. If the lookup fails, the variable remains
2676 empty, and $host_lookup_failed is set to "1".
267819. Added "eqi" as a case-independent comparison operator.
268020. The saslauthd authentication condition could segfault if neither service
2681 nor realm was specified.
268321. If an overflowing value such as "2048M" was set for message_size_limit, the
2684 error message that was logged was misleading, and incoming SMTP
2685 connections were dropped. The message is now more accurate, and temporary
2686 errors are given to SMTP connections.
268822. In some error situations (such as 21 above) Exim rejects all SMTP commands
2689 (except RSET) with a 421 error, until QUIT is received. However, it was
2690 failing to send a response to QUIT.
269223. The HELO ACL was being run before the code for helo_try_verify_hosts,
2693 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2694 ACL is now run after the helo_try_verify_hosts code.
269624. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2697 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2698 case-independent, so other case variants are also recognized). Apparently
2699 some systems use these upper case variants.
270125. If more than two messages were waiting for the same host, and a transport
2702 filter was specified for the transport, Exim sent two messages over the
2703 same TCP/IP connection, and then failed with "socket operation on non-
2704 socket" when it tried to send the third.
270626. Added Exim::debug_write and Exim::log_write for embedded Perl use.
270827. The extern definition of crypt16() in expand.c was not being excluded when
2709 the OS had its own crypt16() function.
271128. Added bounce_return_body as a new option, and bounce_return_size_limit
2712 as a preferred synonym for return_size_limit, both as an option and as an
2713 expansion variable.
271529. Added LIBS=-liconv to OS/Makefile-OSF1.
271730. Changed the default configuration ACL to relax the local part checking rule
2718 for addresses that are not in any local domains. For these addresses,
2719 slashes and pipe symbols are allowed within local parts, but the sequence
2720 /../ is explicitly forbidden.
272231. SPA server authentication was not clearing the challenge buffer before
2723 using it.
272532. log_message in a "warn" ACL statement was writing to the reject log as
2726 well as to the main log, which contradicts the documentation and doesn't
2727 seem right (because no rejection is happening). So I have stopped it.
272933. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2730 However, I am unable to do any testing of this.
273234. Fixed an infelicity in the appendfile transport. When checking directories
2733 for a mailbox, to see if any needed to be created, it was accidentally
2734 using path names with one or more superfluous leading slashes; tracing
2735 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
273735. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2738 contents are added to the log line that is written for every discarded
2739 recipient. (Previously a log_message setting was ignored.)
274136. The ${quote: operator now quotes the string if it is empty.
274337. The install script runs exim in order to find its version number. If for
2744 some reason other than non-existence or emptiness, which it checks, it
2745 could not run './exim', it was installing it with an empty version number,
2746 i.e. as "exim-". This error state is now caught, and the installation is
2747 aborted.
274938. An argument was missing from the function that creates an error message
2750 when Exim fails to connect to the socket for saslauthd authentication.
2751 This could cause Exim to crash, or give a corrupted message.
275339. Added isip, isip4, and isip6 to ${if conditions.
275540. The ACL variables $acl_xx are now saved with the message, and can be
2756 accessed later in routers, transports, and filters.
275841. The new lookup type nwildlsearch is like wildlsearch, except that the key
2759 strings in the file are not string-expanded.
276142. If a MAIL command specified a SIZE value that was too large to fit into an
2762 int variable, the check against message_size_limit failed. Such values are
2763 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2764 day this will have to be increased, but I don't think I want to be around
2765 when emails are that large.
2769Exim version 4.22
2772 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2773 iconv() is not standard in FreeBSD.
2775 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2776 IPv6 enabled. The observed symptom was a segmentation fault on return from
2777 the function os_common_find_running_interfaces() in src/os.c.
2779 3. In the check_special_case() function in daemon.c I had used "errno" as an
2780 argument name, which causes warnings on some systems. This was basically a
2781 typo, since it was named "eno" in the comments!
2783 4. The code that waits for the clock to tick (at a resolution of some fraction
2784 of a second) so as to ensure message-id uniqueness was always waiting for
2785 at least one whole tick, when it could have waited for less. [This is
2786 almost certainly not relevant at current processor speeds, where it is
2787 unlikely to ever wait at all. But we try to future-proof.]
2789 5. The function that sleeps for a time interval that includes fractions of a
2790 second contained a race. It did not block SIGALRM between setting the
2791 timer, and suspending (a couple of lines later). If the interval was short
2792 and the sigsuspend() was delayed until after it had expired, the suspension
2793 never ended. On busy systems this could lead to processes getting stuck for
2794 ever.
2796 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2797 process, before it forks any delivery processes. The open lookup caching
2798 mechanism meant that the open file or database connection was passed into
2799 the delivery process. The problem was that delivery processes always tidy
2800 up cached lookup data. This could cause a problem for the next delivery
2801 process started by the queue runner, because the external queue runner
2802 process does not know about the closure. So the next delivery process
2803 still has data in the lookup cache. In the case of a file lookup, there was
2804 no problem because closing a file descriptor in a subprocess doesn't affect
2805 the parent. However, if the lookup was caching a connection to a database,
2806 the connection was closed, and the second delivery process was likely to
2807 see errors such as "PGSQL: query failed: server closed the connection
2808 unexpectedly". The problem has been fixed by closing all cached lookups
2809 in a queue runner before running a delivery process.
2811 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2812 seem to have the "const" qualifier which it has on other OS. I've
2813 parameterised it.
2815 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2816 *of the same type* (client or server) with the same public name that an
2817 error should be diagnosed.
2819 9. When Exim looked up a host name for an IP address, but failed to find the
2820 original IP address when looking up the host name (a safety check), it
2821 output the message "<ip address> does not match any IP for NULL", which was
2822 confusing, to say the least. The bug was that the host name should have
2823 appeared instead of "NULL".
282510. Since release 3.03, if Exim is called by a uid other than root or the Exim
2826 user that is built into the binary, and the -C or -D options is used, root
2827 privilege is dropped before the configuration file is read. In addition,
2828 logging is switched to stderr instead of the normal log files. If the
2829 configuration then re-defines the Exim user, the unprivileged environment
2830 is probably not what is expected, so Exim logs a panic warning message (but
2831 proceeds).
2833 However, if deliver_drop_privilege is set, the unprivileged state may well
2834 be exactly what is intended, so the warning has been cut out in that case,
2835 and Exim is allowed to try to write to its normal log files.
2838Exim version 4.21
2841 1. smtp_return_error_details was not giving details for temporary sender
2842 or receiver verification errors.
2844 2. Diagnose a configuration error if two authenticators have the same public
2845 name.
2847 3. Exim used not to create the message log file for a message until the first
2848 delivery attempt. This could be confusing when incoming messages were held
2849 for policy or load reasons. The message log file is now created at the time
2850 the message is received, and an initial "Received" line is written to it.
2852 4. The automatically generated man page for command line options had a minor
2853 bug that caused no ill effects; however, a more serious problem was that
2854 the procedure for building the man page automatically didn't always
2855 operate. Consequently, release 4.20 contains an out-of-date version. This
2856 shouldn't happen again.
2858 5. When building Exim with embedded Perl support, the script that builds the
2859 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2860 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2862 6. The freeze_tell option was not being used for messages that were frozen on
2863 arrival, either by an ACL or by local_scan().
2865 7. Added the smtp_incomplete_transaction log selector.
2867 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2868 was accepting AUTH without a new EHLO.
2870 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2871 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2872 RFC.
287410. Logging of TCP/IP connections (when configured) now happens in the main
2875 daemon process instead of the child process, so that the TCP/IP connection
2876 count is more accurate (but it can never be perfect).
287811. The use of "drop" in a nested ACL was not being handled correctly in the
2879 outer ACL. Now, if condition failure induced by the nested "drop" causes
2880 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2881 or "require"), the connection is dropped.
288312. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2884 that yield "discard" can now be used with an "accept" or a "discard" verb,
2885 but an error is generated for any others (because I can't see a useful way
2886 to define what should happen).
288813. When an ACL is read dynamically from a file (or anywhere else), the lines
2889 are now processed in the same way as lines in the Exim configuration file.
2890 In particular, continuation lines are supported.
289214. Added the "dnslists = a.b.c!=n.n.n.n" feature.
289415. Added -ti meaning -t -i.
289616. Check for letters, digits, hyphens, and dots in the names of dnslist
2897 domains, and warn by logging if others are found.
289917. At least on BSD, alignment is not guarenteed for the array of ifreq's
2900 returned from GIFCONF when Exim is trying to find the list of interfaces on
2901 a host. The code in os.c has been modified to copy each ifreq to an aligned
2902 structure in all cases.
2904 Also, in some cases, the returned ifreq's were being copied to a 'struct
2905 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2906 means the last couple of bytes of an IPv6 address could be chopped if the
2907 ifreq contained only a normal sockaddr (14 bytes storage).
290918. Named domain lists were not supported in the hosts_treat_as_local option.
2910 An entry such as +xxxx was not recognized, and was treated as a literal
2911 domain name.
291319. Ensure that header lines added by a DATA ACL are included in the reject log
2914 if the ACL subsequently rejects the message.
291620. Upgrade the utility script to use Digest::MD5 instead of just
2917 MD5 (which is deprecated).
291921. When testing a filter file using -bf, Exim was writing a message when it
2920 took the sender from a "From " line in the message, but it was not doing so
2921 when it took $return_path from a Return-Path: header line. It now does.
292322. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2924 with a valid header line field name (a series of printing characters
2925 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
292723. Changed "disc" in the source to "disk" to conform to the documentation and
2928 the book and for uniformity.
293024. Ignore Sendmail's -Ooption=value command line item.
293225. When execve() failed while trying to run a command in a pipe transport,
2933 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2934 could be confused with a return value of 69 from the command itself. This
2935 has been changed to 127, the value the shell returns if it is asked to run
2936 a non-existent command. The wording for the related log line suggests a
2937 non-existent command as the problem.
293926. If received_header_text expands to an empty string, do not add a Received:
2940 header line to the message. (Well, it adds a token one on the spool, but
2941 marks it "old" so that it doesn't get used or transmitted.)
294327. Installed eximstats 1.28 (addition of -nt option).
294528. There was no check for failure on the call to getsockname() in the daemon
2946 code. This can fail if there is a shortage of resources on the system, with
2947 ENOMEM, for example. A temporary error is now given on failure.
294929. Contrary to the C standard, it seems that in some environments, the
2950 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2951 program. Exim now does this explicitly; it affects the formatting of
2952 timestamps using strftime().
295430. If exiqsumm was given junk data, it threw up some uninitialized variable
2955 complaints. I've now initialized all the variables, to avoid this.
295732. Header lines added by a system filter were not being "seen" during
2958 transport-time rewrites.
296033. The info_callback() function passed to OpenSSL is set up with type void
2961 (*)(SSL *, int, int), as described somewhere. However, when calling the
2962 function (actually a macro) that sets it up, the type void(*)() is
2963 expected. I've put in a cast to prevent warnings from picky compilers.
296534. If a DNS black list lookup found a CNAME record, but there were no A
2966 records associated with the domain it pointed at, Exim crashed.
296835. If a DNS black list lookup returned more than one A record, Exim ignored
2969 all but the first. It now scans all returned addresses if a particular IP
2970 value is being sought. In this situation, the contents of the
2971 $dnslist_value variable are a list of all the addresses, separated by a
2972 comma and a space.
297436. Tightened up the rules for host name lookups using reverse DNS. Exim used
2975 to accept a host name and all its aliases if the forward lookup for any of
2976 them yielded the IP address of the incoming connection. Now it accepts only
2977 those names whose forward lookup yields the correct IP address. Any other
2978 names are discarded. This closes a loophole whereby a rogue DNS
2979 administrator could create reverse DNS records to break through a
2980 wildcarded host restriction in an ACL.
298237. If a user filter or a system filter that ran in a subprocess used any of
2983 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2984 the wrong values were passed to the pipe command ($thisaddress had the
2985 value of $0, $0 had the value of $1, etc). This bug was introduced by
2986 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
298838. Improved the line breaking for long SMTP error messages from ACLs.
2989 Previously, if there was no break point between 40 and 75 characters, Exim
2990 left the rest of the message alone. Two changes have been made: (a) I've
2991 reduced the minimum length to 35 characters; (b) if it can't find a break
2992 point between 35 and 75 characters, it looks ahead and uses the first one
2993 that it finds. This may give the occasional overlong line, but at least the
2994 remaining text gets split now.
299639. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2997 file descriptors might be low, and that setting 1000 would always raise it.
2998 It turns out that in some environments, the limit is already over 1000 and
2999 that lowering it causes trouble. So now Exim takes care not to decrease it.
300140. When delivering a message, the value of $return_path is set to $sender_
3002 address at the start of routing (routers may change the value). By an
3003 oversight, this default was not being set up when an address was tested by
3004 -bt or -bv, which affected the outcome if any router or filter referred to
3005 $return_path.
300741. The idea of the "warn" ACL verb is that it adds a header or writes to the
3008 log only when "message" or "log_message" are set. However, if one of the
3009 conditions was an address verification, or a call to a nested ACL, the
3010 messages generated by the underlying test were being passed through. This
3011 no longer happens. The underlying message is available in $acl_verify_
3012 message for both "message" and "log_message" expansions, so it can be
3013 passed through if needed.
301542. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
3016 new expansion $bh_ to give the encoded byte string without charset
3017 translation. Translation happens only if iconv() is available; HAVE_ICONV
3018 indicates this at build time. HEADERS_CHARSET gives the charset to
3019 translate to; headers_charset can change it in the configuration, and
3020 "headers charset" can change it in an individual filter file.
302243. Now that we have a default RFC 2047 charset (see above), the code in Exim
3023 that creates RFC 2047 encoded "words" labels them as that charset instead
3024 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
3025 expansion operator; (ii) when Exim creates a From: line for a local
3026 message; (iii) when a header line is rewritten to include a "phrase" part.
302844. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
3029 buggy, causing it to skip the first lines of messages whose message ID
3030 ended in 'D'. This would not have bitten before Exim release 4.14, because
3031 message IDs were unlikely to end in 'D' before then. The effect was to have
3032 incorrect size information for certain domains.
303445. #include "config.h" was missing at the start of the crypt16.c module. This
3035 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
3036 noticed.
303846. If there was a timeout during a "random" callout check, Exim treated it as
3039 a failure of the random address, and carried on sending RSET and the real
3040 address. If the delay was just some slowness somewhere, the response to the
3041 original RCPT would be taken as a response to RSET and so on, causing
3042 mayhem of various kinds.
304447. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3045 when I implemented it. It didn't allow for the fact that some option values
3046 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3047 the right test for positive values.
304948. Domain names in DNS records are case-independent. Exim always looks them up
3050 in lower case. Some resolvers return domain names in exactly the case they
3051 appear in the zone file, that is, they may contain uppercase letters. Not
3052 all resolvers do this - some return always lower case. Exim was treating a
3053 change of case by a resolver as a change of domain, similar to a widening
3054 of a domain abbreviation. This triggered its re-routing code and so it was
3055 trying to route what was effectively the same domain again. This normally
3056 caused routing to fail (because the router wouldn't handle the domain
3057 twice). Now Exim checks for this case specially, and just changes the
3058 casing of the domain that it ultimately uses when it transmits the message
3059 envelope.
306149. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3062 module.
306450. If a filter generated a file delivery with a non-absolute name (possible if
3065 no home directory exists for the router), the forbid_file option was not
3066 forbidding it.
306851. Added '&' feature to dnslists, to provide bit mask matching in addition to
3069 the existing equality matching.
307152. Exim was using ints instead of ino_t variables in some places where it was
3072 dealing with inode numbers.
307453. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3075 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3076 called TMPDIR, and if it finds it is different, it changes its value.
307854. The smtp_printf() function is now made available to local_scan() so
3079 additional output lines can be written before returning. There is also an
3080 smtp_fflush() function to enable the detection of a dropped connection.
3081 The variables smtp_input and smtp_batched_input are exported to
3082 local_scan().
308455. Changed the default runtime configuration: the message "Unknown user"
3085 has been removed from the ACL, and instead placed on the localuser router,
3086 using the cannot_route_message feature. This means that any verification
3087 failures that generate their own messages won't get overridden. Similarly,
3088 the "Unrouteable address" message that was in the ACL for unverifiable
3089 relay addresses has also been removed.
309156. Added hosts_avoid_esmtp to the smtp transport.
309357. The exicyclog script was not checking for the esoteric option
3094 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3095 will work only if exicyclog is run under the appropriate euid.
309758. Following a discussion on the list, the rules by which Exim recognises line
3098 endings on incoming messages have been changed. The -dropcr and drop_cr
3099 options are now no-ops, retained only for backwards compatibility. The
3100 following line terminators are recognized: LF CRLF CR. However, special
3101 processing applies to CR:
3103 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3104 nor a local message in the state where . is a terminator.
3106 (ii) If a bare CR is encountered in a header line, an extra space is added
3107 after the line terminator so as not to end the header. The reasoning
3108 behind this is that bare CRs in header lines are most likely either
3109 to be mistakes, or people trying to play silly games.
311159. The size of a message, as listed by "-bp" or in the Exim monitor window,
3112 was being incorrectly given as 18 bytes larger than it should have been.
3113 This is a VOB (very old bug).
311560. This may never have affected anything current, but just in case it has:
3116 When the local host is found other than at the start of a list of hosts,
3117 the local host, those with the same MX, and any that follow, are discarded.
3118 When the list in question was part of a longer list of hosts, the following
3119 hosts (not currently being processed) were also being discarded. This no
3120 longer happens. I'm not sure if this situation could ever has previously
3121 arisen.
312361. Added the "/MX" feature to lists of hosts in the manualroute and query
3124 program routers.
312662. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3127 header. This is something that is recommended in a new Internet Draft, and
3128 is something that is documented as being done by Sendmail. There are two
3129 possible values. For messages generated by the autoreply transport, Exim
3130 adds:
3132 Auto-Submitted: auto-replied
3134 whereas for all other generated messages (e.g. bounces) it adds
3136 Auto-Submitted: auto-generated
313863. The "personal" condition in filters now includes a test for the
3139 Auto-Submitted: header. If it contains the string "auto-" the message it
3140 not considered personal.
314264. Added rcpt_include_affixes as a generic transport option.
314465. Added queue_only_override (default true).
314666. Added the syslog_duplication option.
314867. If what should have been the first header line of a message consisted of
3149 a space followed by a colon, Exim was mis-interpreting it as a header line.
3150 It isn't of course - it is syntactically invalid and should therefore be
3151 treated as the start of the message body. The misbehaviour could have
3152 caused a number of strange effects, including loss of data in subsequent
3153 header lines, and spool format errors.
315568. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3156 client host had authenticated. This control can now be exercised by an ACL
3157 for more flexibility.
315969. By default, callouts do not happen when testing with -bh. There is now a
3160 variant, -bhc, which does actually run the callout code, including
3161 consulting and updating the callout cache.
316370. Added support for saslauthd authentication, courtesy of Alexander
3164 Sabourenkov.
316671. If statvfs() failed on the spool or log directories while checking their
3167 size for availability, Exim confusingly gave the error "space shortage".
3168 Furthermore, in debugging mode it crashed with a floating point exception.
3169 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3170 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3171 serious problem, Exim now writes to the main and panic logs when this
3172 happens, with details of the failure. It then refuses to accept the
3173 incoming message, giving the message "spool directory problem" or "log
3174 directory problem" with a 421 code for SMTP messages.
317672. When Exim is about to re-exec itself, it ensures that the file descriptors
3177 0, 1, and 2 exist, because some OS complain for execs without them (see
3178 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3179 descriptors. However, the code omitted to check that the open succeeded,
3180 causing mysterious errors if for some reason the permissions on /dev/null
3181 got screwed. Now Exim writes a message to the main and panic logs, and
3182 bombs out if it can't open /dev/null.
318473. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3185 interact so that it is all more flexible. It is supposed to remain
3186 backwards compatible. Also added extra_local_interfaces.
318874. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3189 to bomb out with an assertion failure - to the client this appears as a
3190 connection drop. This problem occurs in the part of the code that was taken
3191 from the Samba project. Fortunately, the assertion is in a very simple
3192 function, so I have fixed this by reproducing the function inline in the
3193 one place where it is called, and arranging for authentication to fail
3194 instead of killing the process with assert().
319675. The SPA client code was not working when the server requested OEM rather
3197 than Unicode encoding.
319976. Added code to make require_files with a specific uid setting more usable in
3200 the case where statting the file as root fails - usually a non-root-mounted
3201 NFS file system. When this happens and the failure is EACCES, Exim now
3202 forks a subprocess and does the per-uid checking as the relevant uid.
320477. Added process_log_path.
320678. If log_file_path was not explicitly set, a setting of check_log_space or
3207 check_log_inodes was ignored.
320979. If a space check for the spool or log partitions fails, the incident is now
3210 logged. Of course, in the latter case the data may get lost...
321280. Added the %p formatting code to string_format() so that it can be used to
3213 print addresses in debug_print(). Adjusted all the address printing in the
3214 debugging in store.c to use %p rather than %d.
321681. There was a concern that a line of code in smtp_in.c could overflow a
3217 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3218 initially expressed, the concern was not well-founded, because trailing
3219 spaces are removed early. However, if the trailing spaces were followed by
3220 a NULL, they did not get removed, so the overflow was possible. Two fixes
3221 were applied:
3223 (a) I re-wrote the offending code in a cleaner fashion.
3224 (b) If an incoming SMTP command contains a NULL character, it is rejected
3225 as invalid.
322782. When Exim changes uid/gid to the Exim user at daemon start time, it now
3228 runs initgroups(), so that if the Exim user is in any additional groups,
3229 they will be used during message reception.
3232Exim version 4.20
3235The change log for 4.20 and earlier releases has been archived.