Install latest Cygwin config files.
[exim.git] / doc / doc-txt / ChangeLog
b6c6011d 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.191 2005/08/02 09:09:27 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.
bbe902f0 40
41Exim version 4.52
44TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
46PH/01 When a transport filter timed out in a pipe delivery, and the pipe
47 command itself ended in error, the underlying message about the transport
48 filter timeout was being overwritten with the pipe command error. Now the
49 underlying error message should be appended to the second error message.
51TK/01 Fix poll() being unavailable on Mac OSX 10.2.
53PH/02 Reduce the amount of output that "make" produces by default. Full output
54 can still be requested.
56PH/03 The warning log line about a condition test deferring for a "warn" verb
57 was being output only once per connection, rather than after each
58 occurrence (because it was using the same function as for successful
59 "warn" verbs). This seems wrong, so I have changed it.
61TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
62 it should not have, which might have caused a crash in the right
63 circumstances, but probably never did.
65PH/04 Installed a modified version of Tony Finch's patch to make submission
66 mode fix the return path as well as the Sender: header line, and to
67 add a /name= option so that you can make the user's friendly name appear
68 in the header line.
70TF/03 Added the control = fakedefer ACL modifier.
72TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
73 Mark Lowes for thorough testing.
870f6ba8 74
75TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
77TK/03 Merged latest SRS patch from Miles Wilton.
79PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
80 with the definition in sysexits.h (which is #included earlier).
81 Fortunately, Exim does not actually use EX_OK. The code used to try to
82 preserve the sysexits.h value, by assumimg that macro definitions were
83 scanned for macro replacements. I have been disabused of this notion,
84 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 85
86PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
87 in the smtp transport. When a block could not be written in a single
88 write() function, the timeout was being re-applied to each part-write.
89 This seems wrong - if the receiver was accepting one byte at a time it
90 would take for ever. The timeout is now adjusted when this happens. It
91 doesn't have to be particularly precise.
93TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
94 details. Thanks to Chris Webb <> for the patch!
96PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
97 without a domain if the check to <postmaster@domain> fails.
99SC/01 Eximstats: added -xls and the ability to specify output files
100 (patch written by Frank Heydlauf).
102SC/02 Eximstats: use FileHandles for outputing results.
104SC/03 Eximstats: allow any combination of xls, txt, and html output.
106SC/04 Eximstats: fixed display of large numbers with -nvr option
108SC/05 Eximstats: fixed merging of reports with empty tables.
110SC/06 Eximstats: added the -include_original_destination flag
112SC/07 Eximstats: removed tabs and trailing whitespace.
114TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
116TK/06 MBOX spool code: Add real "From " MBOX separator line
117 so the .eml file is really in mbox format (even though
118 most programs do not really care). Patch from Alex Miller.
120TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
121 The latter is generated from $received_to and is only set if the
122 message has one envelope recipient. SA can use these headers,
123 obviously out-of-the-box. Patch from Alex Miller.
125PH/08 The ${def test on a variable was returning false if the variable's
126 value was "0", contrary to what the specification has always said!
127 The result should be true unless the variable is empty.
129PH/09 The syntax error of a character other than { following "${if
130 def:variable_name" (after optional whitespace) was not being diagnosed.
131 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
132 accidental colon was present, for example, could give incorrect results.
134PH/10 Tidied the code in a number of places where the st_size field of a stat()
135 result is used (not including appendfile, where other changes are about
136 to be made).
138PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
139 This involved changing a lot of size variables from int to off_t. It
140 should work with maildirs and everything.
142TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
143 spamd dying while we are connected to it.
145TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
146 <>
148PH/12 Applied Alex Kiernan's patch for the API change for the error callback
149 function for BDB 4.3.
151PH/13 Changed auto_thaw such that it does not apply to bounce messages.
153PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
154 the sources for PCRE have been re-arranged and more files are now
155 involved.
157PH/15 The code I had for printing potentially long long variables in PH/11
158 above was not the best (it lost precision). The length of off_t variables
159 is now inspected at build time, and an appropriate printing format (%ld
160 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
161 to be "long long int" or "long int". This is needed for the internal
162 formatting function string_vformat().
b1c749bb 163
164PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
165 the configuration file to be ":syslog", then the script "guesses" where
166 the logs files are, rather than using the compiled in default. In our
167 case the guess is not the same as the compiled default, so the script
168 suddenly stopped working when I started to use syslog. The patch checks
169 to see if log_file_path is "". If so, it attempts to read it from exim
170 with no configuration file to get the compiled in version, before it
171 falls back to the previous guessing code."
173TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
174 implementing BATV in an Exim configuration. See NewStuff for the gory
175 details.
177PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
178 Makefile that are specific to HP-UX.
180PH/18 If the "use_postmaster" option was set for a recipient callout together
181 with the "random" option, the postmaster address was used as the MAIL
182 FROM address for the random test, but not for the subsequent recipient
183 test. It is now used for both.
185PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
186 patch removes a few documentation additions to RFC 3028, because the
187 latest draft now contains them. It adds the new en;ascii-case comparator
188 and a new error check for 8bit text in MIME parts. Comparator and
189 require names are now matched exactly. I enabled the subaddress
190 extension, but it is not well tested yet (read: it works for me)."
192PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
193 rework some of the code of TK/09 above to avoid the hardwired use of
194 "%lld" and "long long". Replaced the call to snprintf() with a call to
195 string_vformat().
197PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
198 records point to non-existent hosts", "retry timeout exceeded", and
199 "retry time not reached for any host after a long failure period".
ca02eafb 200
201PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
202 experimental DomainKeys support:
204 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
205 (2) On an error such as an illegally used "control", the wrong name for
206 the control was given.
208 These problems did NOT occur unless DomainKeys support was compiled.
210PH/23 Added daemon_startup_retries and daemon_startup_sleep.
212PH/24 Added ${if match_ip condition.
214PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
215 databases so that it will be absolutely obvious if a crash occurs in the
216 DB library. This is a regular occurrence (often caused by mis-matched
217 db.h files).
ff790e47 219PH/26 Insert a lot of missing (void) casts for functions such as chown(),
220 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
221 picked up on a user's system that detects such things. There doesn't seem
222 to be a gcc warning option for this - only an attribute that has to be
223 put on the function's prototype. It seems that in Fedora Core 4 they have
224 set this on a number of new functions. No doubt there will be more in due
225 course.
ff790e47 226
227PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
228 specify a transport. However, if an address that was verified by such a
229 router was the subject of a callout, Exim crashed because it tried to
230 read the rcpt_include_affixes from the non-existent transport. Now it
231 just assumes that the setting of that option is false. This bug was
232 introduced by 4.51/PH/31.
234PH/28 Changed -d+all to exclude +memory, because that information is very
235 rarely of interest, but it makes the output a lot bigger. People tend to
236 do -d+all out of habit.
238PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
239 code in os-type was giving problems when lives in lib64, like on
240 x86_64 Fedora Core.
242PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
243 aren't the modern standard, and it seems that some systems' include files
244 don't always have them. Exim was already checking for some of the newer
245 ones like T_AAAA, and defining it itself. I've added checks for all the
246 record types that Exim uses.
248PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
249 not automatically generating a new one, as it is supposed to. This
250 prevented TLS from working. If the file did exist, but contained invalid
251 data, a new version was generated, as expected. It was only the case of a
252 non-existent file that was broken.
254TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
255 with a change in libdomainkeys > 0.64.
257TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
258 from DNS. If the selector record carries the flag, it now has
259 precedence over the domain-wide flag.
261TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
263PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
264 the use of a port name that isn't defined in /etc/services) occurred, the
265 message was deferred as in a normal delivery, and thus remained on the
266 spool, instead of being failed because of the mua_wrapper setting. This
267 is now fixed, and I tidied up some of the mua_wrapper messages at the
268 same time.
270SC/08 Eximstats: whilst parsing the mainlog(s), store information about
271 the messages in a hash of arrays rather than using individual hashes.
272 This is a bit cleaner and results in dramatic memory savings, albeit
273 at a slight CPU cost.
275SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
276 as requested by Marc Sherman.
278SC/10 Eximstats: added histograms for user specified patterns as requested
279 by Marc Sherman.
281SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
283PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
284 fopen() in the content-scanning modules that did not already have it.
e7ad8a65 286
287Exim version 4.51
290TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
291 doc/experimental-spec.txt for details. (
2f079f46 293TK/02 Fix ACL "control" statement not being available in MIME ACL.
295TK/03 Fix ACL "regex" condition not being available in MIME ACL.
297PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
298 to test Sieve filters that use "vacation".
300PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
301 that changes the way the GnuTLS parameters are stored in the cache file.
302 The new format can be generated externally. For backward compatibility,
303 if the data in the cache doesn't make sense, Exim assumes it has read an
304 old-format file, and it generates new data and writes a new file. This
305 means that you can't go back to an older release without removing the
306 file.
308PH/03 A redirect router that has both "unseen" and "one_time" set does not
309 work if there are any delivery delays because "one_time" forces the
310 parent to be marked "delivered", so its unseen clone is never tried
311 again. For this reason, Exim now forbids the simultaneous setting of
312 these two options.
314PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
315 redirected to themselves ("homonym" addresses). Read the long ChangeLog
316 entry if you want to know the details. The fix, however, neglected to
317 consider the case when local delivery batching is involved. The test for
318 "previously delivered" was not happening when checking to see if an
319 address could be batched with a previous (undelivered) one; under
320 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 321 address.
323PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
324 in its include files, and this causes problems building Exim.
326PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
327 header_syntax) but Exim was just ignoring anything given after a slash.
328 In particular, this caused confusion with an attempt to use "verify =
329 reverse_host_lookup/defer_ok". An error is now given when options are
330 supplied for verify items that do not have them. (Maybe reverse_host_
331 lookup should have a defer_ok option, but that's a different point.)
333PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
334 defined by RFC 821) to 2048, because there were problems with some AUTH
335 commands, and RFC 1869 says the size should be increased for extended
336 SMTP commands that take arguments.
338PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
339 Finch).
341PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
342 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 343
344PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
345 an address' error message when a string expansion fails (syntax or
346 whatever). Otherwise the password may appear in the log. Following change
347 PH/42 below, there is no longer a chance of it appearing in a bounce
348 message.
49c2d5ea 349
350PH/11 Installed exipick version 20050225.0 from John Jetmore.
352PH/12 If the last host in a fallback_hosts list was multihomed, only the first
353 of its addresses was ever tried. (Bugzilla bug #2.)
355PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
356 the result incorrectly in the debug output. (It correctly added a newline
357 to what was transported.)
359TF/01 Added $received_time.
361PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
362 commented out examples of how to interface to a virus scanner and to
363 SpamAssassin. Also added commented examples of av_scanner and
364 spamd_address settings.
366PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
367 and controls are allowed in which ACLs. There were a couple of minor
368 errors. Some of the entries in the conditions table (which is a table of
369 where they are NOT allowed) were getting very unwieldy; rewrote them as a
370 negation of where the condition IS allowed.
372PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
374PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
375 header file does not have a version number, so I've had to invent a new
376 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
377 API. The code is untested by me (my Linux distribution still has 0.3.2 of
378 radiusclient), but it was contributed by a Radius user.
380PH/18 Installed Lars Mainka's patch for the support of CRL collections in
381 files or directories, for OpenSSL.
383PH/19 When an Exim process that is running as root has to create an Exim log
384 file, it does so in a subprocess that runs as exim:exim so as to get the
385 ownership right at creation (otherwise, other Exim processes might see
386 the file with the wrong ownership). There was no test for failure of this
387 fork() call, which would lead to the process getting stuck as it waited
388 for a non-existent subprocess. Forks do occasionally fail when resources
389 run out. I reviewed all the other calls to fork(); they all seem to check
390 for failure.
392PH/20 When checking for unexpected SMTP input at connect time (before writing
393 the banner), Exim was not dealing correctly with a non-positive return
394 from the read() function. If the client had disconnected by this time,
395 the result was a log entry for a synchronization error with an empty
396 string after "input=" when read() returned zero. If read() returned -1
397 (an event I could not check), uninitialized data bytes were printed.
398 There were reports of junk text (parts of files, etc) appearing after
399 "input=".
401PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
403PH/22 Added support for macro redefinition, and (re)definition in between
404 driver and ACL definitions.
406PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
407 forgetting to use the resulting value; it was using the unexpanded value.
409PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
410 hadn't been configured. The fix is from Juergen Kreileder, who
411 understands it better than I do:
413 "Here's what I see happening with three configured cyrus_sasl
414 authenticators configured (plain, login, cram-md5):
416 On startup auth_cyrus_sasl_init() gets called for each of these.
417 This means three calls to sasl_listmech() without a specified mech_list.
418 => SASL tests which mechs of all available mechs actually work
419 => three warnings about OTP not working
420 => the returned list contains: plain, login, cram-md5, digest-md5, ...
422 With the patch, sasl_listmech() also gets called three times. But now
423 SASL's mech_list option is set to the server_mech specified in the the
424 authenticator. Or in other words, the answer from sasl_listmech()
425 gets limited to just the mech you're testing for (which is different
426 for each call.)
427 => the return list contains just 'plain' or 'login', 'cram-md5' or
428 nothing depending on the value of ob->server_mech.
430 I've just tested the patch: Authentication still works fine,
431 unavailable mechs specified in the exim configuration are still
432 caught, and the auth.log warnings about OTP are gone."
434PH/25 When debugging is enabled, the contents of the command line are added
435 to the debugging output, even when log_selector=+arguments is not
436 specified.
438PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
439 answer is "GNU", and only if the return is "GNU/something" is the answer
440 "Linux".
442PH/27 $acl_verify_message is now set immediately after the failure of a
443 verification in an ACL, and so is available in subsequent modifiers. In
444 particular, the message can be preserved by coding like this:
446 warn !verify = sender
447 set acl_m0 = $acl_verify_message
449 Previously, $acl_verify_message was set only while expanding "message"
450 and "log_message" when a very denied access.
452PH/28 Modified OS/os.c-Linux with
454 -#ifndef OS_LOAD_AVERAGE
455 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
457 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
458 nomenclature these days.)
460PH/29 Installed patch from the Sieve maintainer that adds the options
461 sieve_useraddress and sieve_subaddress to the redirect router.
463PH/30 In these circumstances:
464 . Two addresses routed to the same list of hosts;
465 . First host does not offer TLS;
466 . First host accepts first address;
467 . First host gives temporary error to second address;
468 . Second host offers TLS and a TLS session is established;
469 . Second host accepts second address.
470 Exim incorrectly logged both deliveries with the TLS parameters (cipher
471 and peerdn, if requested) that were in fact used only for the second
472 address.
7e8bec7a 473
474PH/31 When doing a callout as part of verifying an address, Exim was not paying
475 attention to any local part prefix or suffix that was matched by the
476 router that accepted the address. It now behaves in the same way as it
477 does for delivery: the affixes are removed from the local part unless
478 rcpt_include_affixes is set on the transport.
480PH/32 Add the sender address, as F=<...>, to the log line when logging a
481 timeout during the DATA phase of an incoming message.
483PH/33 Sieve envelope tests were broken for match types other than :is. I have
484 applied a patch sanctioned by the Sieve maintainer.
c688b954 485
486PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
487 the uid or gid is negative. A case of a negative gid caused this to be
488 noticed. The fix allows for either to be negative.
490PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
491 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
492 overlooked.
494PH/36 The change PH/12 above was broken. Fixed it.
496PH/37 Exim used to check for duplicate addresses in the middle of routing, on
497 the grounds that routing the same address twice would always produce the
498 same answer. This might have been true once, but it is certainly no
499 longer true now. Routing a child address may depend on the previous
500 routing that produced that child. Some complicated redirection strategies
501 went wrong when messages had multiple recipients, and made Exim's
502 behaviour dependent on the order in which the addresses were given.
504 I have moved the duplicate checking until after the routing is complete.
505 Exim scans the addresses that are assigned to local and remote
506 transports, and removes any duplicates. This means that more work will be
507 done, as duplicates will always all be routed, but duplicates are
508 presumably rare, so I don't expect this is of any significance.
510 For deliveries to pipes, files, and autoreplies, the duplicate checking
511 still happens during the routing process, since they are not going to be
512 routed further.
514PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
515 It corrects a timeout issue with spamd. This is Ian's comment: "The
516 background is that sometimes spamd either never reads data from a
517 connection it has accepted, or it never writes response data. The exiscan
518 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
519 blindly assumes that writes won't block so it may never time out."
521PH/39 Allow G after quota size as well as K and M.
523PH/40 The value set for $authenticated_id in an authenticator may not contain
524 binary zeroes or newlines because the value is written to log lines and
525 to spool files. There was no check on this. Now the value is run through
526 the string_printing() function so that such characters are converted to
527 printable escape sequences.
529PH/41 $message_linecount is a new variable that contains the total number of
530 lines in the message. Compare $body_linecount, which is the count for the
531 body only.
533PH/42 Exim no longer gives details of delivery errors for specific addresses in
534 bounce and delay warning messages, except in certain special cases, which
535 are as follows:
537 (a) An SMTP error message from a remote host;
538 (b) A message specified in a :fail: redirection;
539 (c) A message specified in a "fail" command in a system filter;
540 (d) A message specified in a FAIL return from the queryprogram router;
541 (e) A message specified by the cannot_route_message router option.
543 In these cases only, Exim does include the error details in bounce and
544 warning messages. There are also a few cases where bland messages such
545 as "unrouteable address" or "local delivery error" are given.
547PH/43 $value is now also set for the "else" part of a ${run expansion.
549PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
550 being worked on, but at least Exim now implements the latest version to
551 play with."
553PH/45 In a pipe transport, although a timeout while waiting for the pipe
554 process to complete was treated as a delivery failure, a timeout while
555 writing the message to the pipe was logged, but erroneously treated as a
556 successful delivery. Such timeouts include transport filter timeouts. For
557 consistency with the overall process timeout, these timeouts are now
558 treated as errors, giving rise to delivery failures by default. However,
559 there is now a new Boolean option for the pipe transport called
560 timeout_defer, which, if set TRUE, converts the failures into defers for
561 both kinds of timeout. A transport filter timeout is now identified in
562 the log output.
564PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
565 systems where "make" and "gmake" are different, calling "gmake" at top
566 level broke things. I've arranged for the value of $(MAKE) to be passed
567 from the Makefile to this script so that it can call the same version of
568 "make".
7982096b 570
571A note about Exim versions 4.44 and 4.50
574Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
575changes of various kinds. As a consequence, a big documentation update was
576needed. This delayed the release for rather longer than seemed good, especially
577in the light of a couple of (minor) security issues. Therefore, the changes
578that fixed bugs were backported into 4.43, to create a 4.44 maintenance
579release. So 4.44 and 4.50 are in effect two different branches that both start
580from 4.43.
582I have left the 4.50 change log unchanged; it contains all the changes since
5834.43. The change log for 4.44 is below; many of its items are identical to
584those for 4.50. This seems to be the most sensible way to preserve the
585historical information.
f7b63901 588Exim version 4.50
591 1. Minor wording change to the doc/README.SIEVE file.
139059f6 593 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 594 computation of the current number of files was incorrect.
495ae4b0 595
596 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
597 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
598 place.
600 4. Give more explanation in the error message when the command for a transport
601 filter fails to execute.
603 5. There are several places where Exim runs a non-Exim command in a
604 subprocess. The SIGUSR1 signal should be disabled for these processes. This
605 was being done only for the command run by the queryprogram router. It is
606 now done for all such subprocesses. The other cases are: ${run, transport
607 filters, and the commands run by the lmtp and pipe transports.
609 6. Added CONFIGURE_GROUP build-time option.
611 7. Some older OS have a limit of 256 on the maximum number of file
612 descriptors. Exim was using setrlimit() to set 1000 as a large value
613 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
614 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 615
616 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
617 was an oversight, and furthermore, ever since the addition of extra
618 controls (e.g. 4.43/32), the checks on when to allow different forms of
619 "control" were broken. There should now be diagnostics for all cases when a
620 control that does not make sense is encountered.
622 9. Added the /retain_sender option to "control=submission".
62410. $recipients is now available in the predata ACL (oversight).
62611. Tidy the search cache before the fork to do a delivery from a message
627 received from the command line. Otherwise the child will trigger a lookup
628 failure and thereby defer the delivery if it tries to use (for example) a
629 cached ldap connection that the parent has called unbind on.
63112. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
632 of $address_data from the recipient verification was clobbered by the
633 sender verification.
63513. The value of address_data from a sender verification is now available in
636 $sender_address_data in subsequent conditions in the ACL statement.
63814. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
64015. Added a new option "connect=<time>" to callout options, to set a different
641 connection timeout.
64316. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
644 was its contents. (It was OK if the option was not defined at all.)
64617. A "Completed" log line is now written for messages that are removed from
647 the spool by the -Mrm option.
64918. New variables $sender_verify_failure and $recipient_verify_failure contain
650 information about exactly what failed.
65219. Added -dd to debug only the daemon process.
65420. Incorporated Michael Haardt's patch to ldap.c for improving the way it
655 handles timeouts, both on the server side and network timeouts. Renamed the
656 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
65821. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
659 It is now set to "smtps".
66122. $host_address is now set to the target address during the checking of
662 ignore_target_hosts.
66423. When checking ignore_target_hosts for an ipliteral router, no host name was
665 being passed; this would have caused $sender_host_name to have been used if
666 matching the list had actually called for a host name (not very likely,
667 since this list is usually IP addresses). A host name is now passed as
668 "[x.x.x.x]".
67024. Changed the calls that set up the SIGCHLD handler in the daemon to use the
671 code that specifies a non-restarting handler (typically sigaction() in
672 modern systems) in an attempt to fix a rare and obscure crash bug.
67425. Narrowed the window for a race in the daemon that could cause it to ignore
675 SIGCHLD signals. This is not a major problem, because they are used only to
676 wake it up if nothing else does.
67826. A malformed maildirsize file could cause Exim to calculate negative values
679 for the mailbox size or file count. Odd effects could occur as a result.
680 The maildirsize information is now recalculated if the size or filecount
681 end up negative.
68327. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
684 support for a long time. Removed HAVE_SYS_VFS_H.
68628. Installed the latest version of exipick from John Jetmore.
68829. In an address list, if the pattern was not a regular expression, an empty
689 subject address (from a bounce message) matched only if the pattern was an
690 empty string. Non-empty patterns were not even tested. This was the wrong
691 because it is perfectly reasonable to use an empty address as part of a
692 database query. An empty address is now tested by patterns that are
693 lookups. However, all the other forms of pattern expect the subject to
694 contain a local part and a domain, and therefore, for them, an empty
695 address still always fails if the pattern is not itself empty.
69730. Exim went into a mad DNS loop when attempting to do a callout where the
698 host was specified on an smtp transport, and looking it up yielded more
699 than one IP address.
70131. Re-factored the code for checking spool and log partition space into a
702 function that finds that data and another that does the check. The former
703 is then used to implement four new variables: $spool_space, $log_space,
704 $spool_inodes, and $log_inodes.
70632. The RFC2047 encoding function was originally intended for short strings
707 such as real names; it was not keeping to the 75-character limit for
708 encoded words that the RFC imposes. It now respects the limit, and
709 generates multiple encoded words if necessary. To be on the safe side, I
710 have increased the buffer size for the ${rfc2047: expansion operator from
711 1024 to 2048 bytes.
71333. It is now permitted to omit both strings after an "if" condition; if the
714 condition is true, the result is "true". As before, when the second string
715 is omitted, a false condition yields an empty string. This makes it less
716 cumbersome to write custom ACL and router conditions.
71834. Failure to deliver a bounce message always caused it to be frozen, even if
719 there was an errors_to setting on the router. The errors_to setting is now
720 respected.
72235. If an IPv6 address is given for -bh or -bhc, it is now converted to the
723 canonical form (fully expanded) before being placed in
724 $sender_host_address.
72636. The table in the code that translates DNS record types into text (T_A to
727 "A" for instance) was missing entries for NS and CNAME. It is just possible
728 that this could have caused confusion if both these types were looked up
729 for the same domain, because the text type is used as part of Exim's
730 per-process caching. But the chance of anyone hitting this buglet seems
731 very small.
73337. The dnsdb lookup has been extended in a number of ways.
735 (1) There is a new type, "zns", which walks up the domain tree until it
736 finds some nameserver records. It should be used with care.
738 (2) There is a new type, "mxh", which is like "mx" except that it returns
739 just the host names, not the priorities.
741 (3) It is now possible to give a list of domains (or IP addresses) to be
742 looked up. The behaviour when one of the lookups defers can be
743 controlled by a keyword.
7bb56e1f 744
ea3bc19b 745 (4) It is now possible to specify the separator character for use when
7bb56e1f 746 multiple records are returned.
33397d19 747
74838. The dnslists ACL condition has been extended: it is now possible to supply
749 a list of IP addresses and/or domains to be looked up in a particular DNS
750 domain.
75239. Added log_selector=+queue_time_overall.
75440. When running the queue in the test harness, wait just a tad after forking a
755 delivery process, to get repeatability of debugging output.
75741. Include certificate and key file names in error message when GnuTLS fails
758 to set them up, because the GnuTLS error message doesn't include the name
759 of the failing file when there is a problem reading it.
76142. Allow both -bf and -bF in the same test run.
76343. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
76544. The "Exiscan patch" is now merged into the mainline Exim source.
76745. Sometimes the final signoff response after QUIT could fail to get
768 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
769 < 0 before doing a fflush(). This bug looks as though it goes back to the
770 introduction of TLS in release 3.20, but "sometimes" must have been rare
771 because the tests only now provoked it.
77346. Reset the locale to "C" after calling embedded Perl, in case it was changed
774 (this can affect the format of dates).
77647. exim_tidydb, when checking for the continued existence of a message for
777 which it has found a message-specific retry record, was not finding
778 messages that were in split spool directories. Consequently, it was
779 deleting retry records that should have stayed in existence.
78148. Steve fixed some bugs in eximstats.
78349. The SPA authentication driver was not abandoning authentication and moving
784 on to the next authenticator when an expansion was forced to fail,
785 contradicting the general specification for all authenticators. Instead it
786 was generating a temporary error. It now behaves as specified.
78850. The default ordering of permitted cipher suites for GnuTLS was pessimal
789 (the order specifies the preference for clients). The order is now AES256,
790 AES128, 3DES, ARCFOUR128.
79251. Small patch to Sieve code - explicitly set From: when generating an
793 autoreply.
79552. Exim crashed if a remote delivery caused a very long error message to be
796 recorded - for instance if somebody sent an entire SpamAssassin report back
797 as a large number of 550 error lines. This bug was coincidentally fixed by
798 increasing the size of one of Exim's internal buffers (big_buffer) that
799 happened as part of the Exiscan merge. However, to be on the safe side, I
800 have made the code more robust (and fixed the comments that describe what
801 is going on).
80353. Now that there can be additional text after "Completed" in log lines (if
804 the queue_time_overall log selector is set), a one-byte patch to exigrep
805 was needed to allow it to recognize "Completed" as not the last thing in
806 the line.
80854. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
809 patch that reportedly fixes this has been added. I am not expert enough to
810 create a test for it. This is what the patch creator wrote:
812 "I found a little strange behaviour of ldap code when working with
813 Windows 2003 AD Domain, where users was placed in more than one
814 Organization Units. When I tried to give exim partial DN, the exit code
815 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
816 But simultaneously result of request was absolutely normal ldap result,
817 so I produce this patch..."
819 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
820 REFERENCE, so I have modified the code to exclude the patch when that macro
821 is not defined.
82355. Some experimental protocols are using DNS PTR records for new purposes. The
824 keys for these records are domain names, not reversed IP addresses. The
825 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
826 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 827 CAN-2005-0021
7102e136 828
82956. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
83157. Double the size of the debug message buffer (to 2048) so that more of very
832 long debug lines gets shown.
83458. The exicyclog utility now does better if the number of log files to keep
835 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
83759. Two changes related to the smtp_active_hostname option:
839 (1) $smtp_active_hostname is now available as a variable.
840 (2) The default for smtp_banner uses $smtp_active_hostname instead
841 of $primary_hostname.
84360. The host_aton() function is supposed to be passed a string that is known
844 to be a valid IP address. However, in the case of IPv6 addresses, it was
845 not checking this. This is a hostage to fortune. Exim now panics and dies
846 if the condition is not met. A case was found where this could be provoked
847 from a dnsdb PTR lookup with an IPv6 address that had more than 8
848 components; fortuitously, this particular loophole had already been fixed
849 by change 4.50/55 above.
851 If there are any other similar loopholes, the new check in host_aton()
852 itself should stop them being exploited. The report I received stated that
853 data on the command line could provoke the exploit when Exim was running as
854 exim, but did not say which command line option was involved. All I could
855 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
856 running as the user.
ea3a6f44 857 CAN-2005-0021
85961. There was a buffer overflow vulnerability in the SPA authentication code
860 (which came originally from the Samba project). I have added a test to the
861 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 862 CAN-2005-0022
b975ba52 863
86462. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
865 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
86763. The daemon start-up calls getloadavg() while still root for those OS that
868 need the first call to be done as root, but it missed one case: when
869 deliver_queue_load_max is set with deliver_drop_privilege. This is
870 necessary for the benefit of the queue runner, because there is no re-exec
871 when deliver_drop_privilege is set.
87364. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
874 This has been fixed.
87665. Caching of lookup data for "hosts =" ACL conditions, when a named host list
877 was in use, was not putting the data itself into the right store pool;
878 consequently, it could be overwritten for a subsequent message in the same
879 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
880 the caching.)
88266. Added hosts_max_try_hardlimit to the smtp transport, default 50.
88467. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
885 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
886 the function were treating the return as a boolean value, which happened to
887 work because 0=false and not-0=true, but is not correct code.
88968. The host_aton() function was not handling scoped IPv6 addresses (those
890 with, for example, "%eth0" on the end) correctly.
89269. Fixed some compiler warnings in acl.c for the bitmaps specified with
893 negated items (that is, ~something) in unsigned ints. Some compilers
894 apparently mutter when there is no cast.
89670. If an address verification called from an ACL failed, and did not produce a
897 user-specific message (i.e. there was only a "system" message), nothing was
898 put in $acl_verify_message. In this situation, it now puts the system
899 message there.
90171. Change 4.23/11 added synchronization checking at the start of an SMTP
902 session; change 4.31/43 added the unwanted input to the log line - except
903 that it did not do this in the start of session case. It now does.
90572. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
906 This is wrong and can cause the other end to generate a synchronization
907 error if it is another Exim or anything else that does the synchronization
908 check. A QUIT command is no longer sent after a timeout.
91073. $host_lookup_deferred has been added, to make it easier to detect DEFERs
911 during host lookups.
91374. The defer_ok option of callout verification was not working if it was used
914 when verifying addresses in header lines, that is, for this case:
916 verify = header_sender/callout=defer_ok
91875. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
919 those file descriptors could be used for SMTP connections. If anything
920 wrote to stderr (the example that came up was "warn" in embedded Perl), it
921 could be sent to the SMTP client, causing chaos. The daemon now opens
922 stdin, stdout, and stderr to /dev/null when it puts itself into the
923 background.
92576. Arrange for output from Perl's "warn" command to be written to Exim's main
926 log by default. The user can override this with suitable Perl magic.
92877. The use of log_message on a "discard" ACL verb, which is supposed to add to
929 the log message when discard triggers, was not working for the DATA ACL or
930 for the non-SMTP ACL.
93278. Error message wording change in sieve.c.
93479. If smtp_accept_max_per_host was set, the number of connections could be
935 restricted to fewer than expected, because the daemon was trying to set up
936 a new connection before checking whether the processes handling previous
937 connections had finished. The check for completed processes is now done
938 earlier. On busy systems, this bug wouldn't be noticed because something
939 else would have woken the daemon, and it would have reaped the completed
940 process earlier.
94280. If a message was submitted locally by a user whose login name contained one
943 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
944 It caused a spool format error. I have fixed the spool reading code. A
945 related problem was that the "from" clause in the Received: line became
946 illegal because of the space(s). It is now covered by ${quote_local_part.
94881. Included the latest eximstats from Steve (adds average sizes to HTML Top
949 tables).
95182. Updated OS/Makefile-AIX as per message from Mike Meredith.
95383. Patch from Sieve maintainer to fix unterminated string problem in
954 "vacation" handling.
95684. Some minor changes to the Linux configuration files to help with other
957 OS variants using glibc.
95985. One more patch for Sieve to update vacation handling to latest spec.
495ae4b0 961
963See the note above about the 4.44 and 4.50 releases.
967Exim version 4.44
970 1. Change 4.43/35 introduced a bug that caused file counts to be
971 incorrectly computed when quota_filecount was set in an appendfile
972 transport
974 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
975 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
976 place.
978 3. Give more explanation in the error message when the command for a transport
979 filter fails to execute.
981 4. There are several places where Exim runs a non-Exim command in a
982 subprocess. The SIGUSR1 signal should be disabled for these processes. This
983 was being done only for the command run by the queryprogram router. It is
984 now done for all such subprocesses. The other cases are: ${run, transport
985 filters, and the commands run by the lmtp and pipe transports.
987 5. Some older OS have a limit of 256 on the maximum number of file
988 descriptors. Exim was using setrlimit() to set 1000 as a large value
989 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
990 systems. I've change it so that if it can't get 1000, it tries for 256.
992 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
993 was an oversight, and furthermore, ever since the addition of extra
994 controls (e.g. 4.43/32), the checks on when to allow different forms of
995 "control" were broken. There should now be diagnostics for all cases when a
996 control that does not make sense is encountered.
998 7. $recipients is now available in the predata ACL (oversight).
1000 8. Tidy the search cache before the fork to do a delivery from a message
1001 received from the command line. Otherwise the child will trigger a lookup
1002 failure and thereby defer the delivery if it tries to use (for example) a
1003 cached ldap connection that the parent has called unbind on.
1005 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1006 of $address_data from the recipient verification was clobbered by the
1007 sender verification.
100910. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1010 was its contents. (It was OK if the option was not defined at all.)
101211. A "Completed" log line is now written for messages that are removed from
1013 the spool by the -Mrm option.
101512. $host_address is now set to the target address during the checking of
1016 ignore_target_hosts.
101813. When checking ignore_target_hosts for an ipliteral router, no host name was
1019 being passed; this would have caused $sender_host_name to have been used if
1020 matching the list had actually called for a host name (not very likely,
1021 since this list is usually IP addresses). A host name is now passed as
1022 "[x.x.x.x]".
102414. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1025 code that specifies a non-restarting handler (typically sigaction() in
1026 modern systems) in an attempt to fix a rare and obscure crash bug.
102815. Narrowed the window for a race in the daemon that could cause it to ignore
1029 SIGCHLD signals. This is not a major problem, because they are used only to
1030 wake it up if nothing else does.
103216. A malformed maildirsize file could cause Exim to calculate negative values
1033 for the mailbox size or file count. Odd effects could occur as a result.
1034 The maildirsize information is now recalculated if the size or filecount
1035 end up negative.
103717. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1038 support for a long time. Removed HAVE_SYS_VFS_H.
ea3a6f44 104018. Updated exipick to current release from John Jetmore.
104219. Allow an empty sender to be matched against a lookup in an address list.
1043 Previously the only cases considered were a regular expression, or an
1044 empty pattern.
104620. Exim went into a mad DNS lookup loop when doing a callout where the
1047 host was specified on the transport, if the DNS lookup yielded more than
1048 one IP address.
105021. The RFC2047 encoding function was originally intended for short strings
1051 such as real names; it was not keeping to the 75-character limit for
1052 encoded words that the RFC imposes. It now respects the limit, and
1053 generates multiple encoded words if necessary. To be on the safe side, I
1054 have increased the buffer size for the ${rfc2047: expansion operator from
1055 1024 to 2048 bytes.
bbe902f0 1056
105722. Failure to deliver a bounce message always caused it to be frozen, even if
1058 there was an errors_to setting on the router. The errors_to setting is now
1059 respected.
106123. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1062 canonical form (fully expanded) before being placed in
1063 $sender_host_address.
106524. Updated eximstats to version 1.33
106725. Include certificate and key file names in error message when GnuTLS fails
1068 to set them up, because the GnuTLS error message doesn't include the name
1069 of the failing file when there is a problem reading it.
107126. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 1072 As per change 25.
bbe902f0 1073
107427. Reset the locale to "C" after calling embedded Perl, in case it was changed
1075 (this can affect the format of dates).
bbe902f0 1076
107728. exim_tidydb, when checking for the continued existence of a message for
1078 which it has found a message-specific retry record, was not finding
1079 messages that were in split spool directories. Consequently, it was
1080 deleting retry records that should have stayed in existence.
108229. eximstats updated to version 1.35
1083 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
1084 1.35 - bugfix such that pie charts by volume are generated correctly
108630. The SPA authentication driver was not abandoning authentication and moving
1087 on to the next authenticator when an expansion was forced to fail,
1088 contradicting the general specification for all authenticators. Instead it
1089 was generating a temporary error. It now behaves as specified.
bbe902f0 1090
109131. The default ordering of permitted cipher suites for GnuTLS was pessimal
1092 (the order specifies the preference for clients). The order is now AES256,
1093 AES128, 3DES, ARCFOUR128.
bbe902f0 1094
109531. Small patch to Sieve code - explicitly set From: when generating an
1096 autoreply.
bbe902f0 1097
109832. Exim crashed if a remote delivery caused a very long error message to be
1099 recorded - for instance if somebody sent an entire SpamAssassin report back
1100 as a large number of 550 error lines. This bug was coincidentally fixed by
1101 increasing the size of one of Exim's internal buffers (big_buffer) that
1102 happened as part of the Exiscan merge. However, to be on the safe side, I
1103 have made the code more robust (and fixed the comments that describe what
1104 is going on).
bbe902f0 1105
110633. Some experimental protocols are using DNS PTR records for new purposes. The
1107 keys for these records are domain names, not reversed IP addresses. The
1108 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1109 leaves it alone. Component reversal etc. now happens only for IP addresses.
1110 CAN-2005-0021
111234. The host_aton() function is supposed to be passed a string that is known
1113 to be a valid IP address. However, in the case of IPv6 addresses, it was
1114 not checking this. This is a hostage to fortune. Exim now panics and dies
1115 if the condition is not met. A case was found where this could be provoked
1116 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1117 components; fortuitously, this particular loophole had already been fixed
1118 by change 4.50/55 or 4.44/33 above.
1120 If there are any other similar loopholes, the new check in host_aton()
1121 itself should stop them being exploited. The report I received stated that
1122 data on the command line could provoke the exploit when Exim was running as
1123 exim, but did not say which command line option was involved. All I could
1124 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1125 running as the user.
1126 CAN-2005-0021
112835. There was a buffer overflow vulnerability in the SPA authentication code
1129 (which came originally from the Samba project). I have added a test to the
1130 spa_base64_to_bits() function which I hope fixes it.
1131 CAN-2005-0022
113336. The daemon start-up calls getloadavg() while still root for those OS that
1134 need the first call to be done as root, but it missed one case: when
1135 deliver_queue_load_max is set with deliver_drop_privilege. This is
1136 necessary for the benefit of the queue runner, because there is no re-exec
1137 when deliver_drop_privilege is set.
bbe902f0 1138
113937. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1140 was in use, was not putting the data itself into the right store pool;
1141 consequently, it could be overwritten for a subsequent message in the same
1142 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1143 the caching.)
bbe902f0 1144
114538. Sometimes the final signoff response after QUIT could fail to get
1146 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1147 < 0 before doing a fflush(). This bug looks as though it goes back to the
1148 introduction of TLS in release 3.20, but "sometimes" must have been rare
1149 because the tests only now provoked it.
1152Exim version 4.43
1155 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1156 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1157 Now it returns an integer. A number of calls were still expecting a T/F
1158 return. Fortuitously, in all cases, the tests worked in OK situations,
1159 which is the norm. However, things would have gone wrong on any write
1160 failures on the smtp file descriptor. This function is used when sending
1161 messages over SMTP and also when doing verify callouts.
1163 2. When Exim is called to do synchronous delivery of a locally submitted
1164 message (the -odf or -odi options), it no longer closes stderr before doing
1165 the delivery.
1167 3. Implemented the mua_wrapper option.
1169 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1171 5. Implemented the functions header_remove(), header_testname(),
1172 header_add_at_position(), and receive_remove_recipient(), and exported them
1173 to local_scan().
1175 6. If an ACL "warn" statement specified the addition of headers, Exim already
1176 inserted X-ACL-Warn: at the start if there was no header name. However, it
1177 was not making this test for the second and subsequent header lines if
1178 there were newlines in the string. This meant that an invalid header could
1179 be inserted if Exim was badly configured.
1181 7. Allow an ACL "warn" statement to add header lines at the start or after all
1182 the Received: headers, as well as at the end.
1184 8. Added the rcpt_4xx retry error code.
1186 9. Added postmaster_mailfrom=xxx to callout verification option.
118810. Added mailfrom=xxxx to the callout verification option, for verify=
1189 header_sender only.
119111. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1192 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
119412. Inserted some casts to stop certain compilers warning when using pointer
1195 differences as field lengths or precisions in printf-type calls (mostly
1196 affecting debugging statements).
119813. Added optional readline() support for -be (dynamically loaded).
120014. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1201 same clock tick as a message's arrival, so that its received time was the
1202 same as the "first fail" time on the retry record, and that message
1203 remained on the queue past the ultimate address timeout, every queue runner
1204 would try a delivery (because it was past the ultimate address timeout) but
1205 after another failure, the ultimate address timeout, which should have then
1206 bounced the address, did not kick in. This was a "< instead of <=" error;
1207 in most cases the first failure would have been in the next clock tick
1208 after the received time, and all would be well.
121015. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1211 being recognized when the domain list was tested by the match_domain
1212 condition in an expansion string.
121416. Added the ${str2b64: operator.
121617. Exim was always calling setrlimit() to set a large limit for the number of
1217 processes, without checking whether the existing limit was already
1218 adequate. (It did check for the limit on file descriptors.) Furthermore,
1219 errors from getrlimit() and setrlimit() were being ignored. Now they are
1220 logged to the main and panic logs, but Exim does carry on, to try to do its
1221 job under whatever limits there are.
122318. Imported PCRE 5.0.
122519. Trivial typo in log message " temporarily refused connection" (the leading
1226 space).
122820. If the log selector return_path_on_delivery was set and an address was
1229 redirected to /dev/null, the delivery process crashed because it assumed
1230 that a return path would always be set for a "successful" delivery. In this
1231 case, the whole delivery is bypassed as an optimization, and therefore no
1232 return path is set.
123421. Internal re-arrangement: the function for sending a challenge and reading
1235 a response while authentication was assuming a zero-terminated challenge
1236 string. It's now changed to take a pointer and a length, to allow for
1237 binary data in such strings.
123922. Added the cyrus_sasl authenticator (code supplied by MBM).
124123. Exim was not respecting finduser_retries when seeking the login of the
1242 uid under which it was called; it was always trying 10 times. (The default
1243 setting of finduser_retries is zero.) Also, it was sleeping after the final
1244 failure, which is pointless.
124624. Implemented tls_on_connect_ports.
124825. Implemented acl_smtp_predata.
125026. If the domain in control=submission is set empty, Exim assumes that the
1251 authenticated id is a complete email address when it generates From: or
1252 Sender: header lines.
125427. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1255 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1256 chown and chgrp in /bin and hostname in /usr/bin.
125828. Exim was keeping the "process log" file open after each use, just as it
1259 does for the main log. This opens the possibility of it remaining open for
1260 long periods when the USR1 signal hits a daemon. Occasional processlog
1261 errors were reported, that could have been caused by this. Anyway, it seems
1262 much more sensible not to leave this file open at all, so that is what now
1263 happens.
126529. The long-running daemon process does not normally write to the log once it
1266 has entered its main loop, and it closes the log before doing so. This is
1267 so that log files can straightforwardly be renamed and moved. However,
1268 there are a couple of unusual error situations where the daemon does write
1269 log entries, and I had neglected to close the log afterwards.
127130. The text of an SMTP error response that was received during a remote
1272 delivery was being truncated at 512 bytes. This is too short for some of
1273 the long messages that one sometimes sees. I've increased the limit to
1274 1024.
127631. It is now possible to make retry rules that apply only when a message has a
1277 specific sender, in particular, an empty sender.
127932. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1280 it possible to be selective about when SMTP synchronization is enforced.
128233. Added "control = caseful_local_part" and "control = "caselower_local_part".
128432. Implemented hosts_connection_nolog.
128633. Added an ACL for QUIT.
128834. Setting "delay_warning=" to disable warnings was not working; it gave a
1289 syntax error.
129135. Added mailbox_size and mailbox_filecount to appendfile.
129336. Added control = no_multiline_responses to ACLs.
129537. There was a bug in the logic of the code that waits for the clock to tick
1296 in the case where the clock went backwards by a substantial amount such
1297 that the microsecond fraction of "now" was more than the microsecond
1298 fraction of "then" (but the whole seconds number was less).
130038. Added support for the libradius Radius client library this is found on
1301 FreeBSD (previously only the radiusclient library was supported).
1304Exim version 4.42
1307 1. When certain lookups returned multiple values in the form name=value, the
1308 quoting of the values was not always being done properly. Specifically:
1309 (a) If the value started with a double quote, but contained no whitespace,
1310 it was not quoted.
1311 (b) If the value contained whitespace other than a space character (i.e.
1312 tabs or newlines or carriage returns) it was not quoted.
1313 This fix has been applied to the mysql and pgsql lookups by writing a
1314 separate quoting function and calling it from the lookup code. The fix
1315 should probably also be applied to nisplus, ibase and oracle lookups, but
1316 since I cannot test any of those, I have not disturbed their existing code.
1318 2. A hit in the callout cache for a specific address caused a log line with no
1319 reason for rejecting RCPT. Now it says "Previous (cached) callout
1320 verification failure".
1322 3. There was an off-by-one bug in the queryprogram router. An over-long
1323 return line was truncated at 256 instead of 255 characters, thereby
1324 overflowing its buffer with the terminating zero. As well as fixing this, I
1325 have increased the buffer size to 1024 (and made a note to document this).
1327 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1328 when Exim is waiting for an SMTP response from a remote server, Exim
1329 restarts its select() call on the socket, thereby resetting its timeout.
1330 This is not a problem when such interrupts are rare. Somebody set up a cron
1331 job to run exiwhat every 2 minutes, which is less than the normal select()
1332 timeout (5 or 10 minutes). This meant that the select() timeout never
1333 kicked in because it was always reset. I have fixed this by comparing the
1334 time when an interrupt arrives with the time at the start of the first call
1335 to select(). If more time than the timeout has elapsed, the interrupt is
1336 treated as a timeout.
1338 5. Some internal re-factoring in preparation for the addition of Sieve
1339 extensions (by MH). In particular, the "personal" test is moved to a
1340 separate function, and given an option for scanning Cc: and Bcc: (which is
1341 not set for Exim filters).
1343 6. When Exim created an email address using the login of the caller as the
1344 local part (e.g. when creating a From: or Sender: header line), it was not
1345 quoting the local part when it contained special characters such as @.
1347 7. Installed new OpenBSD configuration files.
1349 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1350 try to make them clearer.
1352 9. Callout options, other than the timeout value, were being ignored when
1353 verifying sender addresses in header lines. For example, when using
1355 verify = header_sender/callout=no_cache
1357 the cache was (incorrectly) being used.
135910. Added a missing instance of ${EXE} to the exim_install script; this affects
1360 only the Cygwin environment.
136211. When return_path_on_delivery was set as a log selector, if different remote
1363 addresses in the same message used different return paths and parallel
1364 remote delivery occurred, the wrong values would sometimes be logged.
1365 (Whenever a remote delivery process finished, the return path value from
1366 the most recently started remote delivery process was logged.)
136812. RFC 3848 specifies standard names for the "with" phrase in Received: header
1369 lines when AUTH and/or TLS are in use. This is the "received protocol"
1370 field. Exim used to use "asmtp" for authenticated SMTP, without any
1371 indication (in the protocol name) for TLS use. Now it follows the RFC and
1372 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1373 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1374 names appear in log lines as well as in Received: header lines.
137613. Installed MH's patches for Sieve to add the "copy" and "vacation"
1377 extensions, and comparison tests, and to fix some bugs.
137914. Changes to the "personal" filter test:
1381 (1) The test was buggy in that it was just doing the equivalent of
1382 "contains" tests on header lines. For example, if a user's address was
1383 anne@some.where, the "personal" test would incorrectly be true for
1385 To: susanne@some.where
1387 This test is now done by extracting each address from the header in turn,
1388 and checking the entire address. Other tests that are part of "personal"
1389 are now done using regular expressions (for example, to check local parts
1390 of addresses in From: header lines).
1392 (2) The list of non-personal local parts in From: addresses has been
1393 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1394 taken from the Sieve specification recommendations.
1396 (3) If the message contains any header line starting with "List-" it is
1397 treated as non-personal.
1399 (4) The test for "circular" in the Subject: header line has been removed
1400 because it now seems ill-conceived.
140215. Minor typos in src/EDITME comments corrected.
140416. Installed latest exipick from John Jetmore.
140617. If headers_add on a router specified a text string that was too long for
1407 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1408 of string_sprintf() is now avoided.
141018. $message_body_size was not set (it was always zero) when running the DATA
1411 ACL and the local_scan() function.
141319. For the "mail" command in an Exim filter, no default was being set for
1414 the once_repeat time, causing a random time value to be used if "once" was
1415 specified. (If the value happened to be <= 0, no repeat happened.) The
1416 default is now 0s, meaning "never repeat". The "vacation" command was OK
1417 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1418 (I found it when inspecting the code).
142020. There is now an overall timeout for performing a callout verification. It
1421 defaults to 4 times the callout timeout, which applies to individual SMTP
1422 commands during the callout. The overall timeout applies when there is more
1423 than one host that can be tried. The timeout is checked before trying the
1424 next host. This prevents very long delays if there are a large number of
1425 hosts and all are timing out (e.g. when the network connections are timing
1426 out). The value of the overall timeout can be changed by specifying an
1427 additional sub-option for "callout", called "maxwait". For example:
1429 verify = sender/callout=5s,maxwait=20s
143121. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1432 to the end before writing, but this should make it even safer).
143422. Exim was forgetting that it had advertised PIPELINING for the second and
1435 subsequent messages on an SMTP connection. It was also not resetting its
1436 memory on STARTTLS and an internal HELO.
143823. When Exim logs an SMTP synchronization error within a session, it now
1439 records whether PIPELINING has been advertised or not.
144124. Added 3 instances of "(long int)" casts to time_t variables that were being
1442 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1443 rather than long int.
144525. Installed the latest Cygwin configuration files from the Cygwin maintainer.
144726. Added the never_mail option to autoreply.
1450Exim version 4.41
1453 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1454 crash if the getsockname() call failed; this can happen if a connection is
1455 closed very soon after it is established. The problem was simply in the
1456 order in which certain operations were done, causing Exim to try to write
1457 to the SMTP stream before it had set up the file descriptor. The bug has
1458 been fixed by making things happen in the correct order.
1461Exim version 4.40
1464 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1465 before the connection was closed, thus losing the rejection response.
1467 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1468 some early Solaris releases, but causes trouble in current releases where
1469 socklen_t is defined.
1471 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1472 always exist.
1474 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1475 configured.
1477 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1478 that releasing the top of it at the end releases what was used for sub-
1479 expansions (unless the block got too big). However, discard this block if
1480 the first thing is a variable or header, so that we can use its block when
1481 it is dynamic (useful for very large $message_headers, for example).
1483 6. Lookups now cache *every* query, not just the most recent. A new, separate
1484 store pool is used for this. It can be recovered when all lookup caches are
1485 flushed. Lookups now release memory at the end of their result strings.
1486 This has involved some general refactoring of the lookup sources.
1488 7. Some code has been added to the store_xxx() functions to reduce the amount
1489 of flapping under certain conditions.
1491 8. log_incoming_interface used to affect only the <= reception log lines. Now
1492 it causes the local interface and port to be added to several more SMTP log
1493 lines, for example "SMTP connection from", and rejection lines.
1495 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
149710. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
149911. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1500 could be overwritten at the end of the current message (or the start of a
1501 new message if it was set in a HELO ACL). The value is now preserved for
1502 the duration of the SMTP connection.
150412. If a transport had a headers_rewrite setting, and a matching header line
1505 contained an unqualified address, that address was qualified, even if it
1506 did not match any rewriting rules. The underlying bug was that the values
1507 of the flags that permit the existence of unqualified sender and recipient
1508 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1509 non-local messages, and by -bnq for local messages) were not being
1510 preserved with the message after it was received.
151213. When Exim was logging an SMTP synchronization error, it could sometimes log
1513 "next input=" as part of the text comprising the host identity instead of
1514 the correct text. The code was using the same buffer for two different
1515 strings. However, depending on which order the printing function evaluated
1516 its arguments, the bug did not always show up. Under Linux, for example, my
1517 test suite worked just fine.
151914. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1520 doesn't work with some older versions of Perl. It has been changed to "my",
1521 which in any case is probably the better facility to use.
152315. A really picky compiler found some instances of statements for creating
1524 error messages that either had too many or two few arguments for the format
1525 string.
152716. The size of the buffer for calls to the DNS resolver has been increased
1528 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1529 for addresses that have a lot of PTR records. This alleviates a problem; it
1530 does not fully solve it.
153217. A dnsdb lookup for PTR records that receives more data than will fit in the
1533 buffer now truncates the list and logs the incident, which is the same
1534 action as happens when Exim is looking up a host name and its aliases.
1535 Previously in this situation something unpredictable would happen;
1536 sometimes it was "internal error: store_reset failed".
153818. If a server dropped the connection unexpectedly when an Exim client was
1539 using GnuTLS and trying to read a response, the client delivery process
1540 crashed while trying to generate an error log message.
154219. If a "warn" verb in an ACL added multiple headers to a message in a single
1543 string, for example:
1545 warn message = H1: something\nH2: something
1547 the text was added as a single header line from Exim's point of view
1548 though it ended up OK in the delivered message. However, searching for the
1549 second and subsequent header lines using $h_h2: did not work. This has been
1550 fixed. Similarly, if a system filter added multiple headers in this way,
1551 the routers could not see them.
155320. Expanded the error message when iplsearch is called with an invalid key to
1554 suggest using net-iplsearch in a host list.
155621. When running tests using -bh, any delays imposed by "delay" modifiers in
1557 ACLs are no longer actually imposed (and a message to that effect is
1558 output).
156022. If a "gecos" field in a passwd entry contained escaped characters, in
1561 particular, if it contained a \" sequence, Exim got it wrong when building
1562 a From: or a Sender: header from that name. A second bug also caused
1563 incorrect handling when an unquoted " was present following a character
1564 that needed quoting.
156623. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1567 was not being matched caselessly.
156924. Arranged for all hyphens in the exim.8 source to be escaped with
1570 backslashes.
157225. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1573 properly. Recipient callout cache records were still being keyed to include
1574 the sender, even when use_sender was set false. This led to far more
1575 callouts that were necessary. The sender is no longer included in the key
1576 when use_sender is false.
157826. Added "control = submission" modifier to ACLs.
158027. Added the ${base62d: operator to decode base 62 numbers.
158228. dnsdb lookups can now access SRV records.
158429. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1585 the configuration file.
158730. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1588 (-v) mode. This makes the output for a verbose queue run more intelligible.
159031. Added a use_postmaster feature to recipient callouts.
159232. Added the $body_zerocount variable, containing the number of binary zero
1593 bytes in the message body.
159533. The time of last modification of the "new" subdirectory is now used as the
1596 "mailbox time last read" when there is a quota error for a maildir
1597 delivery.
159934. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
160135. Added +ignore_unknown as a special item in host lists.
160336. Code for decoding IPv6 addresses in host lists is now included, even if
1604 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1605 address was recognized as an IP address, but was then not correctly decoded
1606 into binary, causing unexpected and incorrect effects when compared with
1607 another IP address.
1610Exim version 4.34
1613 1. Very minor rewording of debugging text in manualroute to say "list of
1614 hosts" instead of "hostlist".
1616 2. If verify=header_syntax was set, and a header line with an unqualified
1617 address (no domain) and a large number of spaces between the end of the
1618 name and the colon was received, the reception process suffered a buffer
1619 overflow, and (when I tested it) crashed. This was caused by some obsolete
1620 code that should have been removed. The fix is to remove it!
1622 3. When running in the test harness, delay a bit after writing a bounce
1623 message to get a bit more predictability in the log output.
1625 4. Added a call to search_tidyup() just before forking a reception process. In
1626 theory, someone could use a lookup in the expansion of smtp_accept_max_
1627 per_host which, without the tidyup, could leave open a database connection.
1629 5. Added the variables $recipient_data and $sender_data which get set from a
1630 lookup success in an ACL "recipients" or "senders" condition, or a router
1631 "senders" option, similar to $domain_data and $local_part_data.
1633 6. Moved the writing of debug_print from before to after the "senders" test
1634 for routers.
1636 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1637 problems for message scanning, either using a data ACL, or using
1638 local_scan() because the Received: header was not generated till after they
1639 were called (in order to set the time as the time of reception completion).
1640 I have revised the way this works. The header is now generated after the
1641 body is received, but before the ACL or local_scan() are called. After they
1642 are run, the timestamp in the header is updated.
1645Exim version 4.33
1648 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1649 before starting a queue runner without re-exec. This happened only when
1650 deliver_drop_privilege was set or when the Exim user was set to root. The
1651 effect of the bug was that timeouts during subsequent deliveries caused
1652 crashes instead of being properly handled. The handler is now left at its
1653 default (and expected) setting.
1655 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1656 message, again when deliver_drop_privilege is set or Exim is run as root.
1657 The bug described in (1) was not present in this case, but the tidying up
1658 of the other signals was missing. I have made the two cases consistent.
1660 3. The ignore_target_hosts setting on a manualroute router was being ignored
1661 for hosts that were looked up using the /MX notation.
1663 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1664 in domain lists.
1666 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1667 operated on the sender address. After changing the $sender_address to <>
1668 for the sender address verify, Exim was re-instated it as the original
1669 (before rewriting) address, but remembering that it had rewritten it, so it
1670 wasn't rewriting it again. This bug also had the effect of breaking the
1671 sender address verification caching when the sender address was rewritten.
1673 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1674 This has been changed so that if the ip literal address matches
1675 ignore_target_hosts, the router declines.
1677 7. Added expansion conditions match_domain, match_address, and match_local_
1678 part (NOT match_host).
1680 8. The placeholder for the Received: header didn't have a length field set.
1682 9. Added code to Exim itself and to exim_lock to test for a specific race
1683 condition that could lead to file corruption when using MBX delivery. The
1684 issue is with the lockfile that is created in /tmp. If this file is removed
1685 after a process has opened it but before that process has acquired a lock,
1686 there is the potential for a second process to recreate the file and also
1687 acquire a lock. This could lead to two Exim processes writing to the file
1688 at the same time. The added code performs the same test as UW imapd; it
1689 checks after acquiring the lock that its file descriptor still refers to
1690 the same named file.
169210. The buffer for building added header lines was of fixed size, 8192 bytes.
1693 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1694 when Exim is built.
169611. Added the smtp_active_hostname option. If used, this will typically be made
1697 to depend on the incoming interface address. Because $interface_address is
1698 not set up until the daemon has forked a reception process, error responses
1699 that can happen earlier (such as "too many connections") no longer contain
1700 a host name.
170212. If an expansion in a condition on a "warn" statement fails because a lookup
1703 defers, the "warn" statement is abandoned, and the next ACL statement is
1704 processed. Previously this caused the whole ACL to be aborted.
170613. Added the iplsearch lookup type.
170814. Added ident_timeout as a log selector.
171015. Added tls_certificate_verified as a log selector.
171216. Added a global option tls_require_ciphers (compare the smtp transport
1713 option of the same name). This controls incoming TLS connections.
171517. I finally figured out how to make tls_require_ciphers do a similar thing
1716 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1717 before starting the TLS session.
171918. Tabs are now shown as \t in -bP output.
172119. If the log selector return_path_on_delivery was set, Exim crashed when
1722 bouncing a message because it had too many Received: header lines.
172420. If two routers both had headers_remove settings, and the first one included
1725 a superfluous trailing colon, the final name in the first list and the
1726 first name in the second list were incorrectly joined into one item (with a
1727 colon in the middle).
1730Exim version 4.32
1733 1. Added -C and -D options to the exinext utility, mainly to make it easier
1734 to include in the automated testing, but these could be helpful when
1735 multiple configurations are in use.
1737 2. The exinext utility was not formatting the output nicely when there was
1738 an alternate port involved in the retry record key, nor when there was a
1739 message id as well (for retries that were specific to a specific message
1740 and a specific host). It was also confused by IPv6 addresses, because of
1741 the additional colons they contain. I have fixed the IPv4 problem, and
1742 patched it up to do a reasonable job for IPv6.
1744 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1745 delivery, the log line now contains "pipelined" if PIPELINING was used.
1747 4. An SMTP transport process used to panic and die if the bind() call to set
1748 an explicit outgoing interface failed. This has been changed; it is now
1749 treated in the same way as a connect() failure.
1751 5. A reference to $sender_host_name in the part of a conditional expansion
1752 that was being skipped was still causing a DNS lookup. This no longer
1753 occurs.
1755 6. The def: expansion condition was not recognizing references to header lines
1756 that used bh_ and bheader_.
1758 7. Added the _cache feature to named lists.
1760 8. The code for checking quota_filecount in the appendfile transport was
1761 allowing one more file than it should have been.
1763 9. For compatibility with Sendmail, the command line option
1765 -prval:sval
1767 is equivalent to
1769 -oMr rval -oMs sval
1771 and sets the incoming protocol and host name (for trusted callers). The
1772 host name and its colon can be omitted when only the protocol is to be set.
1773 Note the Exim already has two private options, -pd and -ps, that refer to
1774 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1775 "s", but I don't think that's a major issue.
177710. A number of refactoring changes to the code, none of which should affect
1778 Exim's behaviour:
1780 (a) The number of logging options was getting close to filling up the
1781 32-bit word that was used as a bit map. I have split them into two classes:
1782 those that are passed in the argument to log_write(), and those that are
1783 only ever tested independently outside of that function. These are now in
1784 separate 32-bit words, so there is plenty of room for expansion again.
1785 There is no change in the user interface or the logging behaviour.
1787 (b) When building, for example, log lines, the code previously used a
1788 macro that called string_cat() twice, in order to add two strings. This is
1789 not really sufficiently general. Furthermore, there was one instance where
1790 it was actually wrong because one of the argument was used twice, and in
1791 one call a function was used. (As it happened, calling the function twice
1792 did not affect the overall behaviour.) The macro has been replaced by a
1793 function that can join an arbitrary number of extra strings onto a growing
1794 string.
1796 (c) The code for expansion conditions now uses a table and a binary chop
1797 instead of a serial search (which was left over from when there were very
1798 few conditions). Also, it now recognizes conditions like "pam" even when
1799 the relevant support is not compiled in: a suitably worded error message is
1800 given if an attempt is made to use such a condition.
180211. Added ${time_interval:xxxxx}.
180412. A bug was causing one of the ddress fields not to be passed back correctly
1805 from remote delivery subprocesses. The field in question was not being
1806 subsequently used, so this caused to problems in practice.
180813. Added new log selectors queue_time and deliver_time.
181014. Might have fixed a bug in maildirsizefile handling that threw up
1811 "unexpected character" debug warnings, and recalculated the data
1812 unnecessarily. In any case, I expanded the warning message to give more
1813 information.
181515. Added the message "Restricted characters in address" to the statements in
1816 the default ACL that block characters like @ and % in local parts.
181816. Change 71 for release 4.31 proved to be much less benign that I imagined.
1819 Three changes have been made:
1821 (a) There was a serious bug; a negative response to MAIL caused the whole
1822 recipient domain to be cached as invalid, thereby blocking all messages
1823 to all local parts at the same domain, from all senders. This bug has
1824 been fixed. The domain is no longer cached after a negative response to
1825 MAIL if the sender used is not empty.
1827 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1828 been restored.
1830 (c) A new callout option, "use_sender" has been added for people who want
1831 the modified behaviour.
1834Exim version 4.31
1837 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1838 Larry Rosenman.
1840 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1841 indeed breaks things for older releases.
1843 3. Added additional logging to the case where there is a problem reading data
1844 from a filter that is running in a subprocess using a pipe, in order to
1845 try to track down a specific problem.
1847 4. Testing facility fudge: when running in the test harness and attempting
1848 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1849 getting "No route to host". Convert this to a timeout.
1851 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1852 warning.
1854 6. Some OS don't have socklen_t but use size_t instead. This affects the
1855 fifth argument of getsockopt() amongst other things. This is now
1856 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1857 can be set for individual OS. I have set it for SunOS5, OSF1, and
1858 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1859 some earlier ones do not.
1861 7. Change 4.30/15 was not doing the test caselessly.
1863 8. The standard form for an IPv6 address literal was being rejected by address
1864 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1865 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1866 this, as well as the form without the "IPv6" on the front (but only when
1867 address literals are enabled, of course).
1869 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
187110. Exim crashed if a message with an empty sender address specified by -f
1872 encountered a router with an errors_to setting. This could be provoked only
1873 by a command such as
1875 exim -f "" ...
1877 where an empty string was supplied; "<>" did not hit this bug.
187911. Installed PCRE release 4.5.
188112. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1882 remained set. It is now erased.
188413. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1885 times from message ids (which are base 36 rather than the normal 62).
188714. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1888 were being counted as actual protocol errors, and logged if the log
1889 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1890 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1891 and DATA following a set of rejected RCPTs do not count as protocol errors.
1892 In other words, Exim assumes they were pipelined, though this may not
1893 actually be the case. Of course, in all cases the client gets an
1894 appropriate error code.
189615. If a lookup fails in an ACL condition, a message about the failure may
1897 be available; it is used if testing the ACL cannot continue, because most
1898 such messages specify what the cause of the deferral is. However, some
1899 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1900 that caused an old message to be retained and used if a later statement
1901 caused a defer, replacing the real cause of the deferral.
190316. If an IP address had so many PTR records that the DNS lookup buffer
1904 was not large enough to hold them, Exim could crash while trying to process
1905 the truncated data. It now detects and logs this case.
190717. Further to 4.21/58, another change has been made: if (and only if) the
1908 first line of a message (the first header line) ends with CRLF, a bare LF
1909 in a subsequent header line has a space inserted after it, so as not to
1910 terminate the header.
191218. Refactoring: tidied an ugly bit of code in appendfile that copied data
1913 unnecessarily, used atoi() instead of strtol(), and didn't check the
1914 termination when getting file sizes from file names by regex.
191619. Completely re-implemented the support for maildirsize files, in the light
1917 of a number of problems with the previous contributed implementation
1918 (4.30/29). In particular:
1920 . If the quota is zero, the maildirsize file is maintained, but no quota is
1921 imposed.
1923 . If the maildir directory does not exist, it is created before any attempt
1924 to write a maildirsize file.
1926 . The quota value in the file is just a cache; if the quota is changed in
1927 the transport, the new value overrides.
1929 . A regular expression is available for excluding directories from the
1930 count.
193220. The autoreply transport checks the characters in options that define the
1933 message's headers; it allows continued headers, but it was checking with
1934 isspace() after an embedded newline instead of explicitly looking for a
1935 space or a tab.
193721. If all the "regular" hosts to which an address was routed had passed their
1938 expiry times, and had not reached their retry times, the address was
1939 bounced, even if fallback hosts were defined. Now Exim should go on to try
1940 the fallback hosts.
194222. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1943 equivalent code in the SMTP transport. Some hosts send humungous responses
1944 to HELO/EHLO, more than 1024 it seems.
194623. Refactoring: code in filter.c used (void *) for "any old type" but this
1947 gives compiler warnings in some environments. I've now done it "properly",
1948 using a union.
195024. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1951 (because of problems with the built-in one) was declared to return uschar *
1952 instead of char *, causing compiler failure.
195425. Fixed a file descriptor leak when processing alias/forward files.
195626. Fixed a minor format string issue in dbfn.c.
195827. Typo in exim.c: ("dmbnz" for "dbmnz").
196028. If a filter file refered to $h_xxx or $message_headers, and the headers
1961 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1962 become corrupted.
196429. When a sender address is verified, it is cached, to save repeating the test
1965 when there is more than one recipient in a message. However, when the
1966 verification involves a callout, it is possible for different callout
1967 options to be set for different recipients. It is too complicated to keep
1968 track of this in the cache, so now Exim always runs a verification when a
1969 callout is required, relying on the callout cache for the optimization.
1970 The overhead is duplication of the address routing, but this should not be
1971 too great.
197330. Fixed a bug in callout caching. If a RCPT command caused the sender address
1974 to be verified with callout=postmaster, and the main callout worked but the
1975 postmaster check failed, the verification correctly failed. However, if a
1976 subsequent RCPT command asked for sender verification *without* the
1977 postmaster check, incorrect caching caused this verification also to fail,
1978 incorrectly.
198031. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
1981 it was not caching the DNS options (qualify_single, search_parents) that
1982 were used when the lookup failed. A subsequent lookup with different
1983 options therefore always gave the same answer, though there were cases
1984 where it should not have. (Example: a "domains = !$mx_any" option on a
1985 dnslookup router: the "domains" option is always processed without any
1986 widening, but the router might have qualify_single set.) Now Exim uses the
1987 cached value only when the same options are set.
198932. Added John Jetmore's "exipick" utility to the distribution.
199133. GnuTLS: When an attempt to start a TLS session fails for any reason other
1992 than a timeout (e.g. a certificate is required, and is not provided), an
1993 Exim server now closes the connection immediately. Previously it waited for
1994 the client to close - but if the client is SSL, it seems that they each
1995 wait for each other, leading to a delay before one of them times out.
199734: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
1998 maintained 0.8.x compatibility because I don't think many are using it, and
1999 it is clearly obsolete.
200135. Added TLS support for CRLs: a tls_crl global option and one for the smtp
2002 transport.
200436. OpenSSL: $tls_certificate_verified was being set to 1 even if the
2005 client certificate was expired. A simple patch fixes this, though I don't
2006 understand the full logic of why the verify callback is called multiple
2007 times.
200937. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
2010 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
2011 which causes problems with some clients (such as the Certicom SSL Plus
2012 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
2013 disables the coutermeasure allowing Eudora to connect."
201538. Exim was not checking that a write() to a log file succeeded. This could
2016 lead to Bad Things if a log got too big, in particular if it hit a file
2017 size limit. Exim now panics and dies if it cannot write to a log file, just
2018 as it does if it cannot open a log file.
202039. Modified OS/Makefile-Linux so that it now contains
2024 The two -D definitions ensure that Exim is compiled with large file
2025 support, which makes it possible to handle log files that are bigger than
2026 2^31.
202840. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
2029 instance) a domain was checked against a named list that involved a lookup,
2030 causing $domain_data to be set, then another domain was checked against the
2031 same list, then the first domain was re-checked, the value of $domain_data
2032 after the final check could be wrong. In particular, if the second check
2033 failed, it could be set empty. This bug probably also applied to
2034 $localpart_data.
203641. The strip_trailing_dot option was not being applied to the address given
2037 with the -f command-line option.
203942. The code for reading a message's header from the spool was incrementing
2040 $received_count, but never initializing it. This meant that the value was
2041 incorrect (doubled) while delivering a message in the same process in which
2042 it was received. In the most common configuration of Exim, this never
2043 happens - a fresh exec is done - but it can happen when
2044 deliver_drop_privilege is set.
204643. When Exim logs an SMTP synchronization error - client data sent too soon -
2047 it now includes up to 150 characters of the unexpected data in the log
2048 line.
205044. The exim_dbmbuild utility uses fixed size buffers for reading input lines
2051 and building data strings. The size of both of these buffers was 10 000
2052 bytes - far larger than anybody would *ever* want, thought I. Needless to
2053 say, somebody hit the limit. I have increased the maximum line length to
2054 20 000 and the maximum data length of concatenated lines to 100 000. I have
2055 also fixed two bugs, because there was no checking on these buffers. Tsk,
2056 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
2057 buffer is too small.
205945. The exim_dbmbuild utility did not support quoted keys, as Exim does in
2060 lsearch lookups. Now it does.
206246. When parsing a route_list item in a manualroute router, a fixed-length
2063 buffer was used for the list of hosts. I made this 1024 bytes long,
2064 thinking that nobody would ever have a list of hosts that long. Wrong.
2065 Somebody had a whole pile of complicated expansion conditions, and the
2066 string was silently truncated, leading to an expansion error. It turns out
2067 that it is easier to change to an unlimited length (owing to other changes
2068 that have happened since this code was originally written) than to build
2069 structure for giving a limitation error. The length of the item that
2070 expands into the list of hosts is now unlimited.
207247. The lsearch lookup could not handle data where the length of text line was
2073 more than 4095 characters. Such lines were truncated, leading to shortened
2074 data being returned. It should now handle lines of any length.
207648. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
2077 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
2078 ACL").
208049. Cosmetic tidy to scripts like exicyclog that are generated by globally
2081 replacing strings such as BIN_DIRECTORY in a source file: the replacement
2082 no longer happens in comment lines. A list of replacements is now placed
2083 at the head of all of the source files, except those whose only change is
2084 to replace PERL_COMMAND in the very first #! line.
208650. Replaced the slow insertion sort in queue.c, for sorting the list of
2087 messages on the queue, with a bottom-up merge sort, using code contributed
2088 by Michael Haardt. This should make operations like -bp somewhat faster on
2089 large queues. It won't affect queue runners, except when queue_run_in_order
2090 is set.
209251. Installed eximstats 1.31 in the distribution.
209452. Added support for SRV lookups to the dnslookup router.
209653. If an ACL referred to $message_body or $message_body_end, the value was not
2097 reset for any messages that followed in the same SMTP session.
209954. The store-handling optimization for building very long strings was not
2100 differentiating between the different store pools. I don't think this
2101 actually made any difference in practice, but I've tidied it.
210355. While running the routers to verify a sender address, $sender_address
2104 was still set to the sender address. This is wrong, because when routing to
2105 send a bounce to the sender, it would be empty. Therefore, I have changed
2106 it so that, while verifying a sender address, $sender_address is set to <>.
2107 (There is no change to what happens when verifying a recipient address.)
210956. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
2110 target A or AAAA records (if not already returned) without resetting the
2111 qualify_single or search_parents options of the DNS resolver. These are
2112 inappropriate in this case because the targets of MX and SRV records must
2113 be FQDNs. A broken DNS record could cause trouble if it happened to have a
2114 target that, when qualified, matched something in the local domain. These
2115 two options are now turned off when doing these lookups.
211757. It seems that at least some releases of Reiserfs (which does not have the
2118 concept of a fixed number of inodes) returns zero and not -1 for the
2119 number of available inodes. This interacted badly with check_spool_inodes,
2120 which assumed that -1 was the "no such thing" setting. What I have done is
2121 to check that the total number of inodes is greater than zero before doing
2122 the test of how many are available.
212458. When a "warn" ACL statement has a log_message modifier, the message is
2125 remembered, and not repeated. This is to avoid a lot of repetition when a
2126 message has many recipients that cause the same warning to be written.
2127 Howewer, Exim was preserving the list of already written lines for an
2128 entire SMTP session, which doesn't seem right. The memory is now reset if a
2129 new message is started.
213159. The "rewrite" debugging flag was not showing the result of rewriting in the
2132 debugging output unless log_rewrite was also set.
213460. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
2135 of (int)(handle) when we know that handle contains (void *)(-1).
213761. The Exim daemon panic-logs an error return when it closes the incoming
2138 connection. However "connection reset by peer" seems to be common, and
2139 isn't really an error worthy of noting specially, so that particular error
2140 is no long logged.
214262. When Exim is trying to find all the local interfaces, it used to panic and
2143 die if the ioctl to get the interface flags failed. However, it seems that
2144 on at least one OS (Solaris 9) it is possible to have an interface that is
2145 included in the list of interfaces, but for which you get a failure error
2146 for this call. This happens when the interface is not "plumbed" into a
2147 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2148 failure of the "get flags" call assumes that the interface is down.
215063. Added a ${eval10: operator, which assumes all numbers are decimal. This
2151 makes life easier for people who are doing arithmetic on fields extracted
2152 from dates, where you often get leading zeros that should not be
2153 interpreted as octal.
215564. Added qualify_domain to the redirect router, to override the global
2156 setting.
215865. If a pathologically long header line contained very many addresses (the
2159 report of this problem mentioned 10 000) and each of them was rewritten,
2160 Exim could use up a very large amount of memory. (It kept on making new
2161 copies of the header line as it rewrote, and never released the old ones.)
2162 At the expense of a bit more processing, the header rewriting function has
2163 been changed so that it no longer eats memory in this way.
216566. The generation of the Received: header has been moved from the time that a
2166 message starts to be received, to the time that it finishes. The timestamp
2167 in the Received: header should now be very close to that of the <= log
2168 line. There are two side-effects of this change:
2170 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2171 logged header lines no longer include the local Received: line, because
2172 it has not yet been created. The same applies to a copy of the message
2173 that is returned to a non-SMTP sender when a message is rejected.
2175 (b) When a filter file is tested using -bf, no additional Received: header
2176 is added to the test message. After some thought, I decided that this
2177 is a bug fix.
2179 This change does not affect the value of $received_for. It is still set
2180 after address rewriting, but before local_scan() is called.
218267. Installed the latest Cygwin-specific files from the Cygwin maintainer.
218468. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2185 gave an unhelpful panic error message, and a defer error. I have managed to
2186 change this behaviour so that it now rejects any supplied certificate,
2187 which seems right, as the list of acceptable certificates is empty.
218969. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2190 gave an unhelpful defer error. I have not managed to make this reject any
2191 supplied certificates, but the error message it gives is "no certificate
2192 supplied", which is not helpful.
219470. exigrep's output now also includes lines that are not associated with any
2195 message, but which match the given pattern. Implemented by a patch from
2196 Martin Sluka, which also tidied up the Perl a bit.
219871. Recipient callout verification, like sender verification, was using <> in
2199 the MAIL FROM command. This isn't really the right thing, since the actual
2200 sender may affect whether the remote host accepts the recipient or not. I
2201 have changed it to use the actual sender in the callout; this means that
2202 the cache record is now keyed on a recipient/sender pair, not just the
2203 recipient address. There doesn't seem to be a real danger of callout loops,
2204 since a callout by the remote host to check the sender would use <>.
2205 [SEE ABOVE: changed after hitting problems.]
220772. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2208 temporary errors. However, in the case of such a code being given after
2209 the end of a data transmission (i.e. after ".") Exim was failing to write
2210 a retry record for the message. (Yes, there was some broken host that was
2211 actually sending 8xx at this point.)
221373. An unknown lookup type in a host list could cause Exim to panic-die when
2214 the list was checked. (An example that provoked this was putting <; in the
2215 middle of a list instead of at the start.) If this happened during a DATA
2216 ACL check, a -D file could be left lying around. This kind of configuration
2217 error no longer causes Exim to die; instead it causes a defer errror. The
2218 incident is still logged to the main and panic logs.
222074. Buglet left over from Exim 3 conversion. The message "too many messages
2221 in one connection" was written to the rejectlog but not the mainlog, except
2222 when address rewriting (yes!) was being logged.
222475. Added write_rejectlog option.
222676. When a system filter was run not as root (that is, when system_filter_user
2227 was set), the values of the $n variables were not being returned to the
2228 main process; thus, they were not subsequently available in the $sn
2229 variables.
223177. Added +return_path_on_delivery log selector.
223378. A connection timeout was being treated differently from recipients deferred
2234 when testing hosts_max_try with a message that was older than the host's
2235 retry timeout. (The host should not be counted, thus allowing all hosts to
2236 be tried at least once before bouncing.) This may have been the cause of an
2237 occasionally reported bug whereby a message would remain on the queue
2238 longer than the retry timeout, but would be bounced if a delivery was
2239 forced. I say "may" because I never totally pinned down the problem;
2240 setting up timeout/retry tests is difficult. See also the next item.
224279. The ultimate address timeout was not being applied to errors that involved
2243 a combination of host plus message (for example, a timeout on a MAIL
2244 command). When an address resolved to a number of possible hosts, and they
2245 were not all tried for each delivery (e.g. because of hosts_max_try), a
2246 message could remain on the queue longer than the retry timeout.
224880. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2249 Haardt.
225181. Fixed an obscure SMTP outgoing bug which required at least the following
2252 conditions: (a) there was another message waiting for the same server;
2253 (b) the server returned 5xx to all RCPT commands in the first message so
2254 that the message was not completed; (c) the server dropped the connection
2255 or gave a negative response to the RSET that Exim sends to abort the
2256 transaction. The observed case was a dropped connection after DATA that had
2257 been sent in pipelining mode. That is, the server had advertised PIPELINING
2258 but was not implementing it correctly. The effect of the bug was incorrect
2259 behaviour, such as trying another host, and this could lead to a crash.
2262Exim version 4.30
2265 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2266 and daemon.c were passed as pointers to ints; they should have been
2267 pointers to socklen_t variables (which are typically unsigned ints).
2269 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2270 fixed.
2272 3. Fixed a really odd bug that affected only the testing scheme; patching a
2273 certain fixed string in the binary changed the value of another string that
2274 happened to be identical to the end of the original first string.
2276 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2277 name", it returns that address as the IP address. On some operating
2278 systems (e.g. Solaris), it also passes back the IP address string as the
2279 "host name". However, on others (e.g. Linux), it passes back an empty
2280 string. Exim wasn't checking for this, and was changing the host name to an
2281 empty string, assuming it had been canonicized.
2283 5. Although rare, it is permitted to have more than one PTR record for a given
2284 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2285 all the names associated with an address, because they do in Solaris.
2286 However, it seems that they do not in Linux for data that comes from the
2287 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2288 I found this out when I moved to a new Linux workstation and tried to run
2289 the Exim test suite.
2291 To get round this problem I have changed the code so that it now does its
2292 own call to the DNS to look up PTR records when searching for a host name.
2293 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2294 addresses that are only in /etc/hosts are still found.
2296 This behaviour is, however, controlled by an option called host_lookup_
2297 order, which defaults to "bydns:byaddr". If people want to use the other
2298 order, or indeed, just use one or the other means of lookup, they can
2299 specify it in this variable.
2301 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2302 some operating systems, this comes back from gethostbyaddr() as an empty
2303 string, and this is what Exim used to test for. However, it seems that in
2304 other systems, "." is yielded. Exim now tests for this case too.
2306 7. The values of check_spool_space and check_log_space are now held internally
2307 as a number of kilobytes instead of an absolute number of bytes. If a
2308 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2309 kilobyte. This means that much larger values can be stored.
2311 8. Exim monitor: an attempt to get the action menu when not actually pointing
2312 at a message produces an empty menu entitled "No message selected". This
2313 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2314 no entries in it ("Shell widget menu has zero width and/or height"). So I
2315 have added a single, blank menu entry in this case.
2317 9. Added ${quote_local_part.
231910. MIME decoding is now applied to the contents of Subject: header lines when
2320 they are logged.
232211. Now that a reference to $sender_host_address automatically causes a reverse
2323 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2324 host lookup before query-style lookups in lists that might use this
2325 variable. This has therefore been abolished, and the "net-" prefix is no
2326 longer necessary for query-style lookups.
232812. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2329 have been a typo for LFLAGS, so it has been changed.
233113. The install script calls Exim with "-C /dev/null" in order to find the
2332 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2333 to be output. Howeve, since Exim outputs its version number before the
2334 error, it didn't break the script. It just looked ugly. I fixed this by
2335 always allowing "-C /dev/null" if the caller is root.
233714. Ignore overlarge ACL variable number when reading spool file - insurance
2338 against a later release with more variables having written the file.
234015. The standard form for an IPv6 address literal was being rejected by EHLO.
2341 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2342 this, as well as the form without the "IPv6" on the front.
234416. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2345 OS/Makefile-Darwin file.
234717. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2348 only to LDAP libraries that do not have LDAP_OPT_DEREF.
235018. After change 4.21/52, "%ld" was used to format the contents of the $inode
2351 variable. However, some OS use ints for inodes. I've added cast to long int
2352 to get rid of the compiler warning.
235419. I had forgotten to lock out "/../" in configuration file names when
2355 ALT_CONFIG_PREFIX was set.
235720. Routers used for verification do not need to specify transports. However,
2358 if such a router generated a host list, and callout was configured, Exim
2359 crashed, because it could not find a port number from the (non-existent)
2360 transport. It now assumes port 25 in this circumstance.
236221. Added the -t option to exigrep.
236422. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2365 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2366 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2367 them is set, LOOKUP_LSEARCH is forced.
236923. "exim -bV" now outputs a list of lookups that are included in the binary.
237124. Added sender and host information to the "rejected by local_scan()" log
2372 line; previously there was no indication of these.
237425. Added .include_if_exists.
237626. Change 3.952/11 added an explicit directory sync on top of a file sync for
2377 Linux. It turns out that not all file systems support this. Apparently some
2378 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2379 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2380 not supported on the file descriptor, is now ignored when Exim is trying to
2381 sync a directory. This applies only to Linux.
238327. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
238528. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2386 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2387 this.
238929. Added support for maildirsize files from supplied patch (modified a bit).
239130. The use of :fail: followed by an empty string could lead Exim to respond to
2392 sender verification failures with (e.g.):
2394 550 Verification failed for <xxx>
2395 550 Sender verify failed
2397 where the first response line was missing the '-' that indicates it is not
2398 the final line of the response.
240031. The loop for finding the name of the user that called Exim had a hardwired
2401 limit of 10; it now uses the value of finduser_retries, which is used for
2402 all other user lookups.
240432. Added $received_count variable, available in data and not_smtp ACLs, and at
2405 delivery time.
240733. Exim was neglecting to zero errno before one call of strtol() when
2408 expanding a string and expecting an integer value. On some systems this
2409 resulted in spurious "integer overflow" errors. Also, it was casting the
2410 result into an int without checking.
241234. Testing for a connection timeout using "timeout_connect" in the retry rules
2413 did not work. The code looks as if it has *never* worked, though it appears
2414 to have been documented since at least releast 1.62. I have made it work.
241635. The "timeout_DNS" error in retry rules, also documented since at least
2417 1.62, also never worked. As it isn't clear exactly what this means, and
2418 clearly it isn't a major issue, I have abolished the feature by treating it
2419 as "timeout", and writing a warning to the main and panic logs.
242136. The display of retry rules for -brt wasn't always showing the error code
2422 correctly.
242437. Added new error conditions to retry rules: timeout_A, timeout_MX,
2425 timeout_connect_A, timeout_connect_MX.
242738. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2428 to the empty sender.
243039. The daemon was not analysing the content of -oX till after it had closed
2431 stderr and disconnected from the controlling terminal. This meant that any
2432 syntax errors were only noted on the panic log, and the return code from
2433 the command was 0. By re-arranging the code a little, I've made the
2434 decoding happen first, so such errors now appear on stderr, and the return
2435 code is 1. However, the actual setting up of the sockets still happens in
2436 the disconnected process, so errors there are still only recorded on the
2437 panic log.
243940. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2440 connections (as happens on some IP stacks) was logged at start up time as
2441 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2442 it from "IPv6 and IPv4", which means that two separate sockets are being
2443 used.
244541. The debug output for gethostbyname2() or getipnodebyname() failures now
2446 says whether AF_INET or AF_INET6 was passed as an argument.
244842. Exiwhat output was messed up when time zones were included in log
2449 timestamps.
245143. Exiwhat now gives more information about the daemon's listening ports,
2452 and whether -tls-on-connect was used.
245444. The "port" option of the smtp transport is now expanded.
245645. A "message" modifier in a "warn" statement in a non-message ACL was being
2457 silently ignored. Now an error message is written to the main and panic
2458 logs.
246046. There's a new ACL modifier called "logwrite" which writes to a log file
2461 as soon as it is encountered.
246347. Added $local_user_uid and $local_user_gid at routing time.
246548. Exim crashed when trying to verify a sender address that was being
2466 rewritten to "<>".
246849. Exim was recognizing only a space character after ".include". It now also
2469 recognizes a tab character.
247150. Fixed several bugs in the Perl script that creates the exim.8 man page by
2472 extracting the relevant information from the specification. The man page no
2473 longer contains scrambled data for the -d option, and I've added a section
2474 at the front about calling Exim under different names.
247651. Added "extra_headers" argument to the "mail" command in filter files.
247852. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2479 crash.
248153. Installed eximstats 1.29.
248354. Added transport_filter_timeout as a generic transport option.
248555. Exim no longer adds an empty Bcc: header to messages that have no To: or
2486 Cc: header lines. This was required by RFC 822, but it not required by RFC
2487 2822.
248956. Exim used to add From:, Date:, and Message-Id: header lines to any
2490 incoming messages that did not have them. Now it does so only if the
2491 message originates locally, that is, if there is no associated remote host
2492 address. When Resent- header lines are present, this applies to the Resent-
2493 lines rather than the non-Resent- lines.
249557. Drop incoming SMTP connection after too many syntax or protocol errors. The
2496 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
249858. Messages for configuration errors now include the name of the main
2499 configuration file - useful now that there may be more than one file in a
2500 list (.included file names were always shown).
250259. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2503 for those rare installations that do not start the daemon as root or run it
2504 setuid root. I've cut out the call to initgroups() if the daemon is not
2505 root at that time.
250760. The Exim user and group can now be bound into the binary as text strings
2508 that are looked up at the start of Exim's processing.
251061. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
251262. Added $mailstore_basename variable.
251463. Installed patch to sieve.c from Michael Haardt.
251664. When Exim failed to open the panic log after failing to open the main log,
2517 the original message it was trying to log was written to stderr and debug
2518 output, but if they were not available (the usual case in production), it
2519 was lost. Now it is written to syslog before the two lines that record the
2520 failures to open the logs.
252265. Users' Exim filters run in subprocesses under the user's uid. It is
2523 possible for a "deliver" command or an alias in a "personal" command to
2524 provoke an address rewrite. If logging of address rewriting is configured,
2525 this fails because the process is not running as root or exim. There may be
2526 a better way of dealing with this, but for the moment (because 4.30 needs
2527 to be released), I have disabled address rewrite logging when running a
2528 filter in a non-root, non-exim process.
2531Exim version 4.24
2534 1. The buildconfig auxiliary program wasn't quoting the value set for
2535 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2536 not defined. This bug was masked in 4.22 by the effect that was fixed in
2537 change 4.23/1.
2539 2. Some messages that were rejected after a message id was allocated were
2540 shown as "incomplete" by exigrep. It no longer does this for messages that
2541 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2543 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2544 have allow_domain_literals set, the ID did not get logged in the <= line.
2545 Domain literals are now always recognized in Message-ID: header lines.
2547 4. The first argument for a ${extract expansion item is the key name or field
2548 number. Leading and trailing spaces in this item were not being ignored,
2549 causing some misleading effects.
2551 5. When deliver_drop_privilege was set, single queue runner processes started
2552 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2553 same command in the process it spins off) were not dropping privilege.
2555 6. When the daemon running as "exim" started a queue runner, it always
2556 re-executed Exim in the spun-off process. This is a waste of effort when
2557 deliver_drop_privilege is set. The new process now just calls the
2558 queue-runner function directly.
2561Exim version 4.23
2564 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2567 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2568 ignored. Though the use of -oP was forcing the writing of a pid file, it
2569 was always written to the default place.
2571 3. If the message "no IP address found for host xxxx" is generated during
2572 incoming verification, it is now followed by identification of the incoming
2573 connection (so you can more easily find what provoked it).
2575 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2577 5. Added some features to "harden" Exim a bit more against certain attacks:
2579 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2580 be put in Local/Makefile. This is like the never_users runtime option,
2581 but it cannot be overridden. The default setting is "root".
2583 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2584 prefix string with which any file named in a -C command line option
2585 must start.
2587 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2588 is retained for -C and -D only if the caller of Exim is root. Without
2589 it, the exim user may also use -C and -D and retain privilege.
2591 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2592 command line option is disabled.
2594 6. Macro names set by the -D option must start with an upper case letter, just
2595 like macro names defined in the configuration file.
2597 7. Added "dereference=" facility to LDAP.
2599 8. Two instances of the typo "uknown" in the source files are fixed.
2601 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2602 the Configure-Makefile script screwed up while processing it.
260410. Incorporated PCRE 4.4.
260611. The SMTP synchronization check was not operating right at the start of an
2607 SMTP session. For example, it could not catch a HELO sent before the client
2608 waited for the greeting. There is now a check for outstanding input at the
2609 point when the greeting is written. Because of the duplex, asynchronous
2610 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2611 way, but not yet received, when the check is performed.
261312. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2614 on TCP/IP sockets, because this apparently causes some broken clients to
2615 timeout.
261713. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2618 unchanged) from the Cygwin maintainer.
262014. The code for -bV that shows what is in the binary showed "mbx" when maildir
2621 was supported instead of testing for mbx. Effectively a typo.
262315. The spa authenticator server code was not checking that the input it
2624 received was valid base64.
262616. The debug output line for the "set" modifier in ACLs was not showing the
2627 name of the variable that was being set.
262917. Code tidy: the variable type "vtype_string" was never used. Removed it.
263118. Previously, a reference to $sender_host_name did not cause a DNS reverse
2632 lookup on its own. Something else was needed to trigger the lookup. For
2633 example, a match in host_lookup or the need for a host name in a host list.
2634 Now, if $sender_host_name is referenced and the host name has not yet been
2635 looked up, a lookup is performed. If the lookup fails, the variable remains
2636 empty, and $host_lookup_failed is set to "1".
263819. Added "eqi" as a case-independent comparison operator.
264020. The saslauthd authentication condition could segfault if neither service
2641 nor realm was specified.
264321. If an overflowing value such as "2048M" was set for message_size_limit, the
2644 error message that was logged was misleading, and incoming SMTP
2645 connections were dropped. The message is now more accurate, and temporary
2646 errors are given to SMTP connections.
264822. In some error situations (such as 21 above) Exim rejects all SMTP commands
2649 (except RSET) with a 421 error, until QUIT is received. However, it was
2650 failing to send a response to QUIT.
265223. The HELO ACL was being run before the code for helo_try_verify_hosts,
2653 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2654 ACL is now run after the helo_try_verify_hosts code.
265624. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2657 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2658 case-independent, so other case variants are also recognized). Apparently
2659 some systems use these upper case variants.
266125. If more than two messages were waiting for the same host, and a transport
2662 filter was specified for the transport, Exim sent two messages over the
2663 same TCP/IP connection, and then failed with "socket operation on non-
2664 socket" when it tried to send the third.
266626. Added Exim::debug_write and Exim::log_write for embedded Perl use.
266827. The extern definition of crypt16() in expand.c was not being excluded when
2669 the OS had its own crypt16() function.
267128. Added bounce_return_body as a new option, and bounce_return_size_limit
2672 as a preferred synonym for return_size_limit, both as an option and as an
2673 expansion variable.
267529. Added LIBS=-liconv to OS/Makefile-OSF1.
267730. Changed the default configuration ACL to relax the local part checking rule
2678 for addresses that are not in any local domains. For these addresses,
2679 slashes and pipe symbols are allowed within local parts, but the sequence
2680 /../ is explicitly forbidden.
268231. SPA server authentication was not clearing the challenge buffer before
2683 using it.
268532. log_message in a "warn" ACL statement was writing to the reject log as
2686 well as to the main log, which contradicts the documentation and doesn't
2687 seem right (because no rejection is happening). So I have stopped it.
268933. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2690 However, I am unable to do any testing of this.
269234. Fixed an infelicity in the appendfile transport. When checking directories
2693 for a mailbox, to see if any needed to be created, it was accidentally
2694 using path names with one or more superfluous leading slashes; tracing
2695 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
269735. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2698 contents are added to the log line that is written for every discarded
2699 recipient. (Previously a log_message setting was ignored.)
270136. The ${quote: operator now quotes the string if it is empty.
270337. The install script runs exim in order to find its version number. If for
2704 some reason other than non-existence or emptiness, which it checks, it
2705 could not run './exim', it was installing it with an empty version number,
2706 i.e. as "exim-". This error state is now caught, and the installation is
2707 aborted.
270938. An argument was missing from the function that creates an error message
2710 when Exim fails to connect to the socket for saslauthd authentication.
2711 This could cause Exim to crash, or give a corrupted message.
271339. Added isip, isip4, and isip6 to ${if conditions.
271540. The ACL variables $acl_xx are now saved with the message, and can be
2716 accessed later in routers, transports, and filters.
271841. The new lookup type nwildlsearch is like wildlsearch, except that the key
2719 strings in the file are not string-expanded.
272142. If a MAIL command specified a SIZE value that was too large to fit into an
2722 int variable, the check against message_size_limit failed. Such values are
2723 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2724 day this will have to be increased, but I don't think I want to be around
2725 when emails are that large.
2729Exim version 4.22
2732 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2733 iconv() is not standard in FreeBSD.
2735 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2736 IPv6 enabled. The observed symptom was a segmentation fault on return from
2737 the function os_common_find_running_interfaces() in src/os.c.
2739 3. In the check_special_case() function in daemon.c I had used "errno" as an
2740 argument name, which causes warnings on some systems. This was basically a
2741 typo, since it was named "eno" in the comments!
2743 4. The code that waits for the clock to tick (at a resolution of some fraction
2744 of a second) so as to ensure message-id uniqueness was always waiting for
2745 at least one whole tick, when it could have waited for less. [This is
2746 almost certainly not relevant at current processor speeds, where it is
2747 unlikely to ever wait at all. But we try to future-proof.]
2749 5. The function that sleeps for a time interval that includes fractions of a
2750 second contained a race. It did not block SIGALRM between setting the
2751 timer, and suspending (a couple of lines later). If the interval was short
2752 and the sigsuspend() was delayed until after it had expired, the suspension
2753 never ended. On busy systems this could lead to processes getting stuck for
2754 ever.
2756 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2757 process, before it forks any delivery processes. The open lookup caching
2758 mechanism meant that the open file or database connection was passed into
2759 the delivery process. The problem was that delivery processes always tidy
2760 up cached lookup data. This could cause a problem for the next delivery
2761 process started by the queue runner, because the external queue runner
2762 process does not know about the closure. So the next delivery process
2763 still has data in the lookup cache. In the case of a file lookup, there was
2764 no problem because closing a file descriptor in a subprocess doesn't affect
2765 the parent. However, if the lookup was caching a connection to a database,
2766 the connection was closed, and the second delivery process was likely to
2767 see errors such as "PGSQL: query failed: server closed the connection
2768 unexpectedly". The problem has been fixed by closing all cached lookups
2769 in a queue runner before running a delivery process.
2771 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2772 seem to have the "const" qualifier which it has on other OS. I've
2773 parameterised it.
2775 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2776 *of the same type* (client or server) with the same public name that an
2777 error should be diagnosed.
2779 9. When Exim looked up a host name for an IP address, but failed to find the
2780 original IP address when looking up the host name (a safety check), it
2781 output the message "<ip address> does not match any IP for NULL", which was
2782 confusing, to say the least. The bug was that the host name should have
2783 appeared instead of "NULL".
278510. Since release 3.03, if Exim is called by a uid other than root or the Exim
2786 user that is built into the binary, and the -C or -D options is used, root
2787 privilege is dropped before the configuration file is read. In addition,
2788 logging is switched to stderr instead of the normal log files. If the
2789 configuration then re-defines the Exim user, the unprivileged environment
2790 is probably not what is expected, so Exim logs a panic warning message (but
2791 proceeds).
2793 However, if deliver_drop_privilege is set, the unprivileged state may well
2794 be exactly what is intended, so the warning has been cut out in that case,
2795 and Exim is allowed to try to write to its normal log files.
2798Exim version 4.21
2801 1. smtp_return_error_details was not giving details for temporary sender
2802 or receiver verification errors.
2804 2. Diagnose a configuration error if two authenticators have the same public
2805 name.
2807 3. Exim used not to create the message log file for a message until the first
2808 delivery attempt. This could be confusing when incoming messages were held
2809 for policy or load reasons. The message log file is now created at the time
2810 the message is received, and an initial "Received" line is written to it.
2812 4. The automatically generated man page for command line options had a minor
2813 bug that caused no ill effects; however, a more serious problem was that
2814 the procedure for building the man page automatically didn't always
2815 operate. Consequently, release 4.20 contains an out-of-date version. This
2816 shouldn't happen again.
2818 5. When building Exim with embedded Perl support, the script that builds the
2819 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2820 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2822 6. The freeze_tell option was not being used for messages that were frozen on
2823 arrival, either by an ACL or by local_scan().
2825 7. Added the smtp_incomplete_transaction log selector.
2827 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2828 was accepting AUTH without a new EHLO.
2830 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2831 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2832 RFC.
283410. Logging of TCP/IP connections (when configured) now happens in the main
2835 daemon process instead of the child process, so that the TCP/IP connection
2836 count is more accurate (but it can never be perfect).
283811. The use of "drop" in a nested ACL was not being handled correctly in the
2839 outer ACL. Now, if condition failure induced by the nested "drop" causes
2840 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2841 or "require"), the connection is dropped.
284312. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2844 that yield "discard" can now be used with an "accept" or a "discard" verb,
2845 but an error is generated for any others (because I can't see a useful way
2846 to define what should happen).
284813. When an ACL is read dynamically from a file (or anywhere else), the lines
2849 are now processed in the same way as lines in the Exim configuration file.
2850 In particular, continuation lines are supported.
285214. Added the "dnslists = a.b.c!=n.n.n.n" feature.
285415. Added -ti meaning -t -i.
285616. Check for letters, digits, hyphens, and dots in the names of dnslist
2857 domains, and warn by logging if others are found.
285917. At least on BSD, alignment is not guarenteed for the array of ifreq's
2860 returned from GIFCONF when Exim is trying to find the list of interfaces on
2861 a host. The code in os.c has been modified to copy each ifreq to an aligned
2862 structure in all cases.
2864 Also, in some cases, the returned ifreq's were being copied to a 'struct
2865 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2866 means the last couple of bytes of an IPv6 address could be chopped if the
2867 ifreq contained only a normal sockaddr (14 bytes storage).
286918. Named domain lists were not supported in the hosts_treat_as_local option.
2870 An entry such as +xxxx was not recognized, and was treated as a literal
2871 domain name.
287319. Ensure that header lines added by a DATA ACL are included in the reject log
2874 if the ACL subsequently rejects the message.
287620. Upgrade the utility script to use Digest::MD5 instead of just
2877 MD5 (which is deprecated).
287921. When testing a filter file using -bf, Exim was writing a message when it
2880 took the sender from a "From " line in the message, but it was not doing so
2881 when it took $return_path from a Return-Path: header line. It now does.
288322. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2884 with a valid header line field name (a series of printing characters
2885 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
288723. Changed "disc" in the source to "disk" to conform to the documentation and
2888 the book and for uniformity.
289024. Ignore Sendmail's -Ooption=value command line item.
289225. When execve() failed while trying to run a command in a pipe transport,
2893 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2894 could be confused with a return value of 69 from the command itself. This
2895 has been changed to 127, the value the shell returns if it is asked to run
2896 a non-existent command. The wording for the related log line suggests a
2897 non-existent command as the problem.
289926. If received_header_text expands to an empty string, do not add a Received:
2900 header line to the message. (Well, it adds a token one on the spool, but
2901 marks it "old" so that it doesn't get used or transmitted.)
290327. Installed eximstats 1.28 (addition of -nt option).
290528. There was no check for failure on the call to getsockname() in the daemon
2906 code. This can fail if there is a shortage of resources on the system, with
2907 ENOMEM, for example. A temporary error is now given on failure.
290929. Contrary to the C standard, it seems that in some environments, the
2910 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2911 program. Exim now does this explicitly; it affects the formatting of
2912 timestamps using strftime().
291430. If exiqsumm was given junk data, it threw up some uninitialized variable
2915 complaints. I've now initialized all the variables, to avoid this.
291732. Header lines added by a system filter were not being "seen" during
2918 transport-time rewrites.
292033. The info_callback() function passed to OpenSSL is set up with type void
2921 (*)(SSL *, int, int), as described somewhere. However, when calling the
2922 function (actually a macro) that sets it up, the type void(*)() is
2923 expected. I've put in a cast to prevent warnings from picky compilers.
292534. If a DNS black list lookup found a CNAME record, but there were no A
2926 records associated with the domain it pointed at, Exim crashed.
292835. If a DNS black list lookup returned more than one A record, Exim ignored
2929 all but the first. It now scans all returned addresses if a particular IP
2930 value is being sought. In this situation, the contents of the
2931 $dnslist_value variable are a list of all the addresses, separated by a
2932 comma and a space.
293436. Tightened up the rules for host name lookups using reverse DNS. Exim used
2935 to accept a host name and all its aliases if the forward lookup for any of
2936 them yielded the IP address of the incoming connection. Now it accepts only
2937 those names whose forward lookup yields the correct IP address. Any other
2938 names are discarded. This closes a loophole whereby a rogue DNS
2939 administrator could create reverse DNS records to break through a
2940 wildcarded host restriction in an ACL.
294237. If a user filter or a system filter that ran in a subprocess used any of
2943 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2944 the wrong values were passed to the pipe command ($thisaddress had the
2945 value of $0, $0 had the value of $1, etc). This bug was introduced by
2946 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
294838. Improved the line breaking for long SMTP error messages from ACLs.
2949 Previously, if there was no break point between 40 and 75 characters, Exim
2950 left the rest of the message alone. Two changes have been made: (a) I've
2951 reduced the minimum length to 35 characters; (b) if it can't find a break
2952 point between 35 and 75 characters, it looks ahead and uses the first one
2953 that it finds. This may give the occasional overlong line, but at least the
2954 remaining text gets split now.
295639. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2957 file descriptors might be low, and that setting 1000 would always raise it.
2958 It turns out that in some environments, the limit is already over 1000 and
2959 that lowering it causes trouble. So now Exim takes care not to decrease it.
296140. When delivering a message, the value of $return_path is set to $sender_
2962 address at the start of routing (routers may change the value). By an
2963 oversight, this default was not being set up when an address was tested by
2964 -bt or -bv, which affected the outcome if any router or filter referred to
2965 $return_path.
296741. The idea of the "warn" ACL verb is that it adds a header or writes to the
2968 log only when "message" or "log_message" are set. However, if one of the
2969 conditions was an address verification, or a call to a nested ACL, the
2970 messages generated by the underlying test were being passed through. This
2971 no longer happens. The underlying message is available in $acl_verify_
2972 message for both "message" and "log_message" expansions, so it can be
2973 passed through if needed.
297542. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
2976 new expansion $bh_ to give the encoded byte string without charset
2977 translation. Translation happens only if iconv() is available; HAVE_ICONV
2978 indicates this at build time. HEADERS_CHARSET gives the charset to
2979 translate to; headers_charset can change it in the configuration, and
2980 "headers charset" can change it in an individual filter file.
298243. Now that we have a default RFC 2047 charset (see above), the code in Exim
2983 that creates RFC 2047 encoded "words" labels them as that charset instead
2984 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
2985 expansion operator; (ii) when Exim creates a From: line for a local
2986 message; (iii) when a header line is rewritten to include a "phrase" part.
298844. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
2989 buggy, causing it to skip the first lines of messages whose message ID
2990 ended in 'D'. This would not have bitten before Exim release 4.14, because
2991 message IDs were unlikely to end in 'D' before then. The effect was to have
2992 incorrect size information for certain domains.
299445. #include "config.h" was missing at the start of the crypt16.c module. This
2995 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
2996 noticed.
299846. If there was a timeout during a "random" callout check, Exim treated it as
2999 a failure of the random address, and carried on sending RSET and the real
3000 address. If the delay was just some slowness somewhere, the response to the
3001 original RCPT would be taken as a response to RSET and so on, causing
3002 mayhem of various kinds.
300447. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
3005 when I implemented it. It didn't allow for the fact that some option values
3006 may legitimatetly be negative (e.g. size_addition), and it didn't even do
3007 the right test for positive values.
300948. Domain names in DNS records are case-independent. Exim always looks them up
3010 in lower case. Some resolvers return domain names in exactly the case they
3011 appear in the zone file, that is, they may contain uppercase letters. Not
3012 all resolvers do this - some return always lower case. Exim was treating a
3013 change of case by a resolver as a change of domain, similar to a widening
3014 of a domain abbreviation. This triggered its re-routing code and so it was
3015 trying to route what was effectively the same domain again. This normally
3016 caused routing to fail (because the router wouldn't handle the domain
3017 twice). Now Exim checks for this case specially, and just changes the
3018 casing of the domain that it ultimately uses when it transmits the message
3019 envelope.
302149. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
3022 module.
302450. If a filter generated a file delivery with a non-absolute name (possible if
3025 no home directory exists for the router), the forbid_file option was not
3026 forbidding it.
302851. Added '&' feature to dnslists, to provide bit mask matching in addition to
3029 the existing equality matching.
303152. Exim was using ints instead of ino_t variables in some places where it was
3032 dealing with inode numbers.
303453. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
3035 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
3036 called TMPDIR, and if it finds it is different, it changes its value.
303854. The smtp_printf() function is now made available to local_scan() so
3039 additional output lines can be written before returning. There is also an
3040 smtp_fflush() function to enable the detection of a dropped connection.
3041 The variables smtp_input and smtp_batched_input are exported to
3042 local_scan().
304455. Changed the default runtime configuration: the message "Unknown user"
3045 has been removed from the ACL, and instead placed on the localuser router,
3046 using the cannot_route_message feature. This means that any verification
3047 failures that generate their own messages won't get overridden. Similarly,
3048 the "Unrouteable address" message that was in the ACL for unverifiable
3049 relay addresses has also been removed.
305156. Added hosts_avoid_esmtp to the smtp transport.
305357. The exicyclog script was not checking for the esoteric option
3054 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
3055 will work only if exicyclog is run under the appropriate euid.
305758. Following a discussion on the list, the rules by which Exim recognises line
3058 endings on incoming messages have been changed. The -dropcr and drop_cr
3059 options are now no-ops, retained only for backwards compatibility. The
3060 following line terminators are recognized: LF CRLF CR. However, special
3061 processing applies to CR:
3063 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
3064 nor a local message in the state where . is a terminator.
3066 (ii) If a bare CR is encountered in a header line, an extra space is added
3067 after the line terminator so as not to end the header. The reasoning
3068 behind this is that bare CRs in header lines are most likely either
3069 to be mistakes, or people trying to play silly games.
307159. The size of a message, as listed by "-bp" or in the Exim monitor window,
3072 was being incorrectly given as 18 bytes larger than it should have been.
3073 This is a VOB (very old bug).
307560. This may never have affected anything current, but just in case it has:
3076 When the local host is found other than at the start of a list of hosts,
3077 the local host, those with the same MX, and any that follow, are discarded.
3078 When the list in question was part of a longer list of hosts, the following
3079 hosts (not currently being processed) were also being discarded. This no
3080 longer happens. I'm not sure if this situation could ever has previously
3081 arisen.
308361. Added the "/MX" feature to lists of hosts in the manualroute and query
3084 program routers.
308662. Whenever Exim generates a new message, it now adds an Auto-Submitted:
3087 header. This is something that is recommended in a new Internet Draft, and
3088 is something that is documented as being done by Sendmail. There are two
3089 possible values. For messages generated by the autoreply transport, Exim
3090 adds:
3092 Auto-Submitted: auto-replied
3094 whereas for all other generated messages (e.g. bounces) it adds
3096 Auto-Submitted: auto-generated
309863. The "personal" condition in filters now includes a test for the
3099 Auto-Submitted: header. If it contains the string "auto-" the message it
3100 not considered personal.
310264. Added rcpt_include_affixes as a generic transport option.
310465. Added queue_only_override (default true).
310666. Added the syslog_duplication option.
310867. If what should have been the first header line of a message consisted of
3109 a space followed by a colon, Exim was mis-interpreting it as a header line.
3110 It isn't of course - it is syntactically invalid and should therefore be
3111 treated as the start of the message body. The misbehaviour could have
3112 caused a number of strange effects, including loss of data in subsequent
3113 header lines, and spool format errors.
311568. Formerly, the AUTH parameter on a MAIL command was trusted only if the
3116 client host had authenticated. This control can now be exercised by an ACL
3117 for more flexibility.
311969. By default, callouts do not happen when testing with -bh. There is now a
3120 variant, -bhc, which does actually run the callout code, including
3121 consulting and updating the callout cache.
312370. Added support for saslauthd authentication, courtesy of Alexander
3124 Sabourenkov.
312671. If statvfs() failed on the spool or log directories while checking their
3127 size for availability, Exim confusingly gave the error "space shortage".
3128 Furthermore, in debugging mode it crashed with a floating point exception.
3129 These checks are done if check_{spool,log}_{space,inodes} are set, and when
3130 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
3131 serious problem, Exim now writes to the main and panic logs when this
3132 happens, with details of the failure. It then refuses to accept the
3133 incoming message, giving the message "spool directory problem" or "log
3134 directory problem" with a 421 code for SMTP messages.
313672. When Exim is about to re-exec itself, it ensures that the file descriptors
3137 0, 1, and 2 exist, because some OS complain for execs without them (see
3138 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
3139 descriptors. However, the code omitted to check that the open succeeded,
3140 causing mysterious errors if for some reason the permissions on /dev/null
3141 got screwed. Now Exim writes a message to the main and panic logs, and
3142 bombs out if it can't open /dev/null.
314473. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
3145 interact so that it is all more flexible. It is supposed to remain
3146 backwards compatible. Also added extra_local_interfaces.
314874. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3149 to bomb out with an assertion failure - to the client this appears as a
3150 connection drop. This problem occurs in the part of the code that was taken
3151 from the Samba project. Fortunately, the assertion is in a very simple
3152 function, so I have fixed this by reproducing the function inline in the
3153 one place where it is called, and arranging for authentication to fail
3154 instead of killing the process with assert().
315675. The SPA client code was not working when the server requested OEM rather
3157 than Unicode encoding.
315976. Added code to make require_files with a specific uid setting more usable in
3160 the case where statting the file as root fails - usually a non-root-mounted
3161 NFS file system. When this happens and the failure is EACCES, Exim now
3162 forks a subprocess and does the per-uid checking as the relevant uid.
316477. Added process_log_path.
316678. If log_file_path was not explicitly set, a setting of check_log_space or
3167 check_log_inodes was ignored.
316979. If a space check for the spool or log partitions fails, the incident is now
3170 logged. Of course, in the latter case the data may get lost...
317280. Added the %p formatting code to string_format() so that it can be used to
3173 print addresses in debug_print(). Adjusted all the address printing in the
3174 debugging in store.c to use %p rather than %d.
317681. There was a concern that a line of code in smtp_in.c could overflow a
3177 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3178 initially expressed, the concern was not well-founded, because trailing
3179 spaces are removed early. However, if the trailing spaces were followed by
3180 a NULL, they did not get removed, so the overflow was possible. Two fixes
3181 were applied:
3183 (a) I re-wrote the offending code in a cleaner fashion.
3184 (b) If an incoming SMTP command contains a NULL character, it is rejected
3185 as invalid.
318782. When Exim changes uid/gid to the Exim user at daemon start time, it now
3188 runs initgroups(), so that if the Exim user is in any additional groups,
3189 they will be used during message reception.
3192Exim version 4.20
3195The change log for 4.20 and earlier releases has been archived.