added "prvs" and "prvscheck" expansion items
[exim.git] / doc / doc-txt / ChangeLog
4aac9b49 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.158 2005/06/16 15:48:58 ph10 Exp $
3Change log file for Exim from version 4.21
bbe902f0 6
7Exim version 4.52
10TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
12PH/01 When a transport filter timed out in a pipe delivery, and the pipe
13 command itself ended in error, the underlying message about the transport
14 filter timeout was being overwritten with the pipe command error. Now the
15 underlying error message should be appended to the second error message.
17TK/01 Fix poll() being unavailable on Mac OSX 10.2.
19PH/02 Reduce the amount of output that "make" produces by default. Full output
20 can still be requested.
22PH/03 The warning log line about a condition test deferring for a "warn" verb
23 was being output only once per connection, rather than after each
24 occurrence (because it was using the same function as for successful
25 "warn" verbs). This seems wrong, so I have changed it.
27TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
28 it should not have, which might have caused a crash in the right
29 circumstances, but probably never did.
31PH/04 Installed a modified version of Tony Finch's patch to make submission
32 mode fix the return path as well as the Sender: header line, and to
33 add a /name= option so that you can make the user's friendly name appear
34 in the header line.
36TF/03 Added the control = fakedefer ACL modifier.
38TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
39 Mark Lowes for thorough testing.
870f6ba8 40
41TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
43TK/03 Merged latest SRS patch from Miles Wilton.
45PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
46 with the definition in sysexits.h (which is #included earlier).
47 Fortunately, Exim does not actually use EX_OK. The code used to try to
48 preserve the sysexits.h value, by assumimg that macro definitions were
49 scanned for macro replacements. I have been disabused of this notion,
50 so now the code just undefines EX_OK before #including unistd.h.
11d337a4 51
52PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
53 in the smtp transport. When a block could not be written in a single
54 write() function, the timeout was being re-applied to each part-write.
55 This seems wrong - if the receiver was accepting one byte at a time it
56 would take for ever. The timeout is now adjusted when this happens. It
57 doesn't have to be particularly precise.
59TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
60 details. Thanks to Chris Webb <> for the patch!
62PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
63 without a domain if the check to <postmaster@domain> fails.
65SC/01 Eximstats: added -xls and the ability to specify output files
66 (patch written by Frank Heydlauf).
68SC/02 Eximstats: use FileHandles for outputing results.
70SC/03 Eximstats: allow any combination of xls, txt, and html output.
72SC/04 Eximstats: fixed display of large numbers with -nvr option
74SC/05 Eximstats: fixed merging of reports with empty tables.
76SC/06 Eximstats: added the -include_original_destination flag
78SC/07 Eximstats: removed tabs and trailing whitespace.
80TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
82TK/06 MBOX spool code: Add real "From " MBOX separator line
83 so the .eml file is really in mbox format (even though
84 most programs do not really care). Patch from Alex Miller.
86TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
87 The latter is generated from $received_to and is only set if the
88 message has one envelope recipient. SA can use these headers,
89 obviously out-of-the-box. Patch from Alex Miller.
91PH/08 The ${def test on a variable was returning false if the variable's
92 value was "0", contrary to what the specification has always said!
93 The result should be true unless the variable is empty.
95PH/09 The syntax error of a character other than { following "${if
96 def:variable_name" (after optional whitespace) was not being diagnosed.
97 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
98 accidental colon was present, for example, could give incorrect results.
100PH/10 Tidied the code in a number of places where the st_size field of a stat()
101 result is used (not including appendfile, where other changes are about
102 to be made).
104PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
105 This involved changing a lot of size variables from int to off_t. It
106 should work with maildirs and everything.
108TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
109 spamd dying while we are connected to it.
111TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
112 <>
114PH/12 Applied Alex Kiernan's patch for the API change for the error callback
115 function for BDB 4.3.
117PH/13 Changed auto_thaw such that it does not apply to bounce messages.
119PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
120 the sources for PCRE have been re-arranged and more files are now
121 involved.
123PH/15 The code I had for printing potentially long long variables in PH/11
124 above was not the best (it lost precision). The length of off_t variables
125 is now inspected at build time, and an appropriate printing format (%ld
126 or %lld) is chosen and #defined by OFF_T_FMT. We also define ASSUME_
127 LONG_LONG_SUPPORT if the length is greater than 4. This is needed for the
128 internal formatting function string_vformat().
130PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
131 the configuration file to be ":syslog", then the script "guesses" where
132 the logs files are, rather than using the compiled in default. In our
133 case the guess is not the same as the compiled default, so the script
134 suddenly stopped working when I started to use syslog. The patch checks
135 to see if log_file_path is "". If so, it attempts to read it from exim
136 with no configuration file to get the compiled in version, before it
137 falls back to the previous guessing code."
e5a9dba6 139
140Exim version 4.51
143TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
144 doc/experimental-spec.txt for details. (
2f079f46 146TK/02 Fix ACL "control" statement not being available in MIME ACL.
148TK/03 Fix ACL "regex" condition not being available in MIME ACL.
150PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
151 to test Sieve filters that use "vacation".
153PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
154 that changes the way the GnuTLS parameters are stored in the cache file.
155 The new format can be generated externally. For backward compatibility,
156 if the data in the cache doesn't make sense, Exim assumes it has read an
157 old-format file, and it generates new data and writes a new file. This
158 means that you can't go back to an older release without removing the
159 file.
161PH/03 A redirect router that has both "unseen" and "one_time" set does not
162 work if there are any delivery delays because "one_time" forces the
163 parent to be marked "delivered", so its unseen clone is never tried
164 again. For this reason, Exim now forbids the simultaneous setting of
165 these two options.
167PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
168 redirected to themselves ("homonym" addresses). Read the long ChangeLog
169 entry if you want to know the details. The fix, however, neglected to
170 consider the case when local delivery batching is involved. The test for
171 "previously delivered" was not happening when checking to see if an
172 address could be batched with a previous (undelivered) one; under
173 certain circumstances this could lead to multiple deliveries to the same
c2c19e9d 174 address.
176PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
177 in its include files, and this causes problems building Exim.
179PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
180 header_syntax) but Exim was just ignoring anything given after a slash.
181 In particular, this caused confusion with an attempt to use "verify =
182 reverse_host_lookup/defer_ok". An error is now given when options are
183 supplied for verify items that do not have them. (Maybe reverse_host_
184 lookup should have a defer_ok option, but that's a different point.)
186PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
187 defined by RFC 821) to 2048, because there were problems with some AUTH
188 commands, and RFC 1869 says the size should be increased for extended
189 SMTP commands that take arguments.
191PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
192 Finch).
194PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
195 "unknown" error; now it says that the functionality isn't in the binary.
8d67ada3 196
197PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
198 an address' error message when a string expansion fails (syntax or
199 whatever). Otherwise the password may appear in the log. Following change
200 PH/42 below, there is no longer a chance of it appearing in a bounce
201 message.
49c2d5ea 202
203PH/11 Installed exipick version 20050225.0 from John Jetmore.
205PH/12 If the last host in a fallback_hosts list was multihomed, only the first
206 of its addresses was ever tried. (Bugzilla bug #2.)
208PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
209 the result incorrectly in the debug output. (It correctly added a newline
210 to what was transported.)
212TF/01 Added $received_time.
214PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
215 commented out examples of how to interface to a virus scanner and to
216 SpamAssassin. Also added commented examples of av_scanner and
217 spamd_address settings.
219PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
220 and controls are allowed in which ACLs. There were a couple of minor
221 errors. Some of the entries in the conditions table (which is a table of
222 where they are NOT allowed) were getting very unwieldy; rewrote them as a
223 negation of where the condition IS allowed.
225PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
227PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
228 header file does not have a version number, so I've had to invent a new
229 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
230 API. The code is untested by me (my Linux distribution still has 0.3.2 of
231 radiusclient), but it was contributed by a Radius user.
233PH/18 Installed Lars Mainka's patch for the support of CRL collections in
234 files or directories, for OpenSSL.
236PH/19 When an Exim process that is running as root has to create an Exim log
237 file, it does so in a subprocess that runs as exim:exim so as to get the
238 ownership right at creation (otherwise, other Exim processes might see
239 the file with the wrong ownership). There was no test for failure of this
240 fork() call, which would lead to the process getting stuck as it waited
241 for a non-existent subprocess. Forks do occasionally fail when resources
242 run out. I reviewed all the other calls to fork(); they all seem to check
243 for failure.
245PH/20 When checking for unexpected SMTP input at connect time (before writing
246 the banner), Exim was not dealing correctly with a non-positive return
247 from the read() function. If the client had disconnected by this time,
248 the result was a log entry for a synchronization error with an empty
249 string after "input=" when read() returned zero. If read() returned -1
250 (an event I could not check), uninitialized data bytes were printed.
251 There were reports of junk text (parts of files, etc) appearing after
252 "input=".
254PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
256PH/22 Added support for macro redefinition, and (re)definition in between
257 driver and ACL definitions.
259PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
260 forgetting to use the resulting value; it was using the unexpanded value.
262PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
263 hadn't been configured. The fix is from Juergen Kreileder, who
264 understands it better than I do:
266 "Here's what I see happening with three configured cyrus_sasl
267 authenticators configured (plain, login, cram-md5):
269 On startup auth_cyrus_sasl_init() gets called for each of these.
270 This means three calls to sasl_listmech() without a specified mech_list.
271 => SASL tests which mechs of all available mechs actually work
272 => three warnings about OTP not working
273 => the returned list contains: plain, login, cram-md5, digest-md5, ...
275 With the patch, sasl_listmech() also gets called three times. But now
276 SASL's mech_list option is set to the server_mech specified in the the
277 authenticator. Or in other words, the answer from sasl_listmech()
278 gets limited to just the mech you're testing for (which is different
279 for each call.)
280 => the return list contains just 'plain' or 'login', 'cram-md5' or
281 nothing depending on the value of ob->server_mech.
283 I've just tested the patch: Authentication still works fine,
284 unavailable mechs specified in the exim configuration are still
285 caught, and the auth.log warnings about OTP are gone."
287PH/25 When debugging is enabled, the contents of the command line are added
288 to the debugging output, even when log_selector=+arguments is not
289 specified.
291PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
292 answer is "GNU", and only if the return is "GNU/something" is the answer
293 "Linux".
295PH/27 $acl_verify_message is now set immediately after the failure of a
296 verification in an ACL, and so is available in subsequent modifiers. In
297 particular, the message can be preserved by coding like this:
299 warn !verify = sender
300 set acl_m0 = $acl_verify_message
302 Previously, $acl_verify_message was set only while expanding "message"
303 and "log_message" when a very denied access.
305PH/28 Modified OS/os.c-Linux with
307 -#ifndef OS_LOAD_AVERAGE
308 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
310 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
311 nomenclature these days.)
313PH/29 Installed patch from the Sieve maintainer that adds the options
314 sieve_useraddress and sieve_subaddress to the redirect router.
316PH/30 In these circumstances:
317 . Two addresses routed to the same list of hosts;
318 . First host does not offer TLS;
319 . First host accepts first address;
320 . First host gives temporary error to second address;
321 . Second host offers TLS and a TLS session is established;
322 . Second host accepts second address.
323 Exim incorrectly logged both deliveries with the TLS parameters (cipher
324 and peerdn, if requested) that were in fact used only for the second
325 address.
7e8bec7a 326
327PH/31 When doing a callout as part of verifying an address, Exim was not paying
328 attention to any local part prefix or suffix that was matched by the
329 router that accepted the address. It now behaves in the same way as it
330 does for delivery: the affixes are removed from the local part unless
331 rcpt_include_affixes is set on the transport.
333PH/32 Add the sender address, as F=<...>, to the log line when logging a
334 timeout during the DATA phase of an incoming message.
336PH/33 Sieve envelope tests were broken for match types other than :is. I have
337 applied a patch sanctioned by the Sieve maintainer.
c688b954 338
339PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
340 the uid or gid is negative. A case of a negative gid caused this to be
341 noticed. The fix allows for either to be negative.
343PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
344 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
345 overlooked.
347PH/36 The change PH/12 above was broken. Fixed it.
349PH/37 Exim used to check for duplicate addresses in the middle of routing, on
350 the grounds that routing the same address twice would always produce the
351 same answer. This might have been true once, but it is certainly no
352 longer true now. Routing a child address may depend on the previous
353 routing that produced that child. Some complicated redirection strategies
354 went wrong when messages had multiple recipients, and made Exim's
355 behaviour dependent on the order in which the addresses were given.
357 I have moved the duplicate checking until after the routing is complete.
358 Exim scans the addresses that are assigned to local and remote
359 transports, and removes any duplicates. This means that more work will be
360 done, as duplicates will always all be routed, but duplicates are
361 presumably rare, so I don't expect this is of any significance.
363 For deliveries to pipes, files, and autoreplies, the duplicate checking
364 still happens during the routing process, since they are not going to be
365 routed further.
367PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
368 It corrects a timeout issue with spamd. This is Ian's comment: "The
369 background is that sometimes spamd either never reads data from a
370 connection it has accepted, or it never writes response data. The exiscan
371 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
372 blindly assumes that writes won't block so it may never time out."
374PH/39 Allow G after quota size as well as K and M.
376PH/40 The value set for $authenticated_id in an authenticator may not contain
377 binary zeroes or newlines because the value is written to log lines and
378 to spool files. There was no check on this. Now the value is run through
379 the string_printing() function so that such characters are converted to
380 printable escape sequences.
382PH/41 $message_linecount is a new variable that contains the total number of
383 lines in the message. Compare $body_linecount, which is the count for the
384 body only.
386PH/42 Exim no longer gives details of delivery errors for specific addresses in
387 bounce and delay warning messages, except in certain special cases, which
388 are as follows:
390 (a) An SMTP error message from a remote host;
391 (b) A message specified in a :fail: redirection;
392 (c) A message specified in a "fail" command in a system filter;
393 (d) A message specified in a FAIL return from the queryprogram router;
394 (e) A message specified by the cannot_route_message router option.
396 In these cases only, Exim does include the error details in bounce and
397 warning messages. There are also a few cases where bland messages such
398 as "unrouteable address" or "local delivery error" are given.
400PH/43 $value is now also set for the "else" part of a ${run expansion.
402PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
403 being worked on, but at least Exim now implements the latest version to
404 play with."
406PH/45 In a pipe transport, although a timeout while waiting for the pipe
407 process to complete was treated as a delivery failure, a timeout while
408 writing the message to the pipe was logged, but erroneously treated as a
409 successful delivery. Such timeouts include transport filter timeouts. For
410 consistency with the overall process timeout, these timeouts are now
411 treated as errors, giving rise to delivery failures by default. However,
412 there is now a new Boolean option for the pipe transport called
413 timeout_defer, which, if set TRUE, converts the failures into defers for
414 both kinds of timeout. A transport filter timeout is now identified in
415 the log output.
417PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
418 systems where "make" and "gmake" are different, calling "gmake" at top
419 level broke things. I've arranged for the value of $(MAKE) to be passed
420 from the Makefile to this script so that it can call the same version of
421 "make".
7982096b 423
424A note about Exim versions 4.44 and 4.50
427Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
428changes of various kinds. As a consequence, a big documentation update was
429needed. This delayed the release for rather longer than seemed good, especially
430in the light of a couple of (minor) security issues. Therefore, the changes
431that fixed bugs were backported into 4.43, to create a 4.44 maintenance
432release. So 4.44 and 4.50 are in effect two different branches that both start
433from 4.43.
435I have left the 4.50 change log unchanged; it contains all the changes since
4364.43. The change log for 4.44 is below; many of its items are identical to
437those for 4.50. This seems to be the most sensible way to preserve the
438historical information.
f7b63901 441Exim version 4.50
444 1. Minor wording change to the doc/README.SIEVE file.
139059f6 446 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 447 computation of the current number of files was incorrect.
495ae4b0 448
449 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
450 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
451 place.
453 4. Give more explanation in the error message when the command for a transport
454 filter fails to execute.
456 5. There are several places where Exim runs a non-Exim command in a
457 subprocess. The SIGUSR1 signal should be disabled for these processes. This
458 was being done only for the command run by the queryprogram router. It is
459 now done for all such subprocesses. The other cases are: ${run, transport
460 filters, and the commands run by the lmtp and pipe transports.
462 6. Added CONFIGURE_GROUP build-time option.
464 7. Some older OS have a limit of 256 on the maximum number of file
465 descriptors. Exim was using setrlimit() to set 1000 as a large value
466 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
467 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 468
469 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
470 was an oversight, and furthermore, ever since the addition of extra
471 controls (e.g. 4.43/32), the checks on when to allow different forms of
472 "control" were broken. There should now be diagnostics for all cases when a
473 control that does not make sense is encountered.
475 9. Added the /retain_sender option to "control=submission".
47710. $recipients is now available in the predata ACL (oversight).
47911. Tidy the search cache before the fork to do a delivery from a message
480 received from the command line. Otherwise the child will trigger a lookup
481 failure and thereby defer the delivery if it tries to use (for example) a
482 cached ldap connection that the parent has called unbind on.
48412. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
485 of $address_data from the recipient verification was clobbered by the
486 sender verification.
48813. The value of address_data from a sender verification is now available in
489 $sender_address_data in subsequent conditions in the ACL statement.
49114. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
49315. Added a new option "connect=<time>" to callout options, to set a different
494 connection timeout.
49616. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
497 was its contents. (It was OK if the option was not defined at all.)
49917. A "Completed" log line is now written for messages that are removed from
500 the spool by the -Mrm option.
50218. New variables $sender_verify_failure and $recipient_verify_failure contain
503 information about exactly what failed.
50519. Added -dd to debug only the daemon process.
50720. Incorporated Michael Haardt's patch to ldap.c for improving the way it
508 handles timeouts, both on the server side and network timeouts. Renamed the
509 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
51121. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
512 It is now set to "smtps".
51422. $host_address is now set to the target address during the checking of
515 ignore_target_hosts.
51723. When checking ignore_target_hosts for an ipliteral router, no host name was
518 being passed; this would have caused $sender_host_name to have been used if
519 matching the list had actually called for a host name (not very likely,
520 since this list is usually IP addresses). A host name is now passed as
521 "[x.x.x.x]".
52324. Changed the calls that set up the SIGCHLD handler in the daemon to use the
524 code that specifies a non-restarting handler (typically sigaction() in
525 modern systems) in an attempt to fix a rare and obscure crash bug.
52725. Narrowed the window for a race in the daemon that could cause it to ignore
528 SIGCHLD signals. This is not a major problem, because they are used only to
529 wake it up if nothing else does.
53126. A malformed maildirsize file could cause Exim to calculate negative values
532 for the mailbox size or file count. Odd effects could occur as a result.
533 The maildirsize information is now recalculated if the size or filecount
534 end up negative.
53627. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
537 support for a long time. Removed HAVE_SYS_VFS_H.
53928. Installed the latest version of exipick from John Jetmore.
54129. In an address list, if the pattern was not a regular expression, an empty
542 subject address (from a bounce message) matched only if the pattern was an
543 empty string. Non-empty patterns were not even tested. This was the wrong
544 because it is perfectly reasonable to use an empty address as part of a
545 database query. An empty address is now tested by patterns that are
546 lookups. However, all the other forms of pattern expect the subject to
547 contain a local part and a domain, and therefore, for them, an empty
548 address still always fails if the pattern is not itself empty.
55030. Exim went into a mad DNS loop when attempting to do a callout where the
551 host was specified on an smtp transport, and looking it up yielded more
552 than one IP address.
55431. Re-factored the code for checking spool and log partition space into a
555 function that finds that data and another that does the check. The former
556 is then used to implement four new variables: $spool_space, $log_space,
557 $spool_inodes, and $log_inodes.
55932. The RFC2047 encoding function was originally intended for short strings
560 such as real names; it was not keeping to the 75-character limit for
561 encoded words that the RFC imposes. It now respects the limit, and
562 generates multiple encoded words if necessary. To be on the safe side, I
563 have increased the buffer size for the ${rfc2047: expansion operator from
564 1024 to 2048 bytes.
56633. It is now permitted to omit both strings after an "if" condition; if the
567 condition is true, the result is "true". As before, when the second string
568 is omitted, a false condition yields an empty string. This makes it less
569 cumbersome to write custom ACL and router conditions.
57134. Failure to deliver a bounce message always caused it to be frozen, even if
572 there was an errors_to setting on the router. The errors_to setting is now
573 respected.
57535. If an IPv6 address is given for -bh or -bhc, it is now converted to the
576 canonical form (fully expanded) before being placed in
577 $sender_host_address.
57936. The table in the code that translates DNS record types into text (T_A to
580 "A" for instance) was missing entries for NS and CNAME. It is just possible
581 that this could have caused confusion if both these types were looked up
582 for the same domain, because the text type is used as part of Exim's
583 per-process caching. But the chance of anyone hitting this buglet seems
584 very small.
58637. The dnsdb lookup has been extended in a number of ways.
588 (1) There is a new type, "zns", which walks up the domain tree until it
589 finds some nameserver records. It should be used with care.
591 (2) There is a new type, "mxh", which is like "mx" except that it returns
592 just the host names, not the priorities.
594 (3) It is now possible to give a list of domains (or IP addresses) to be
595 looked up. The behaviour when one of the lookups defers can be
596 controlled by a keyword.
7bb56e1f 597
ea3bc19b 598 (4) It is now possible to specify the separator character for use when
7bb56e1f 599 multiple records are returned.
33397d19 600
60138. The dnslists ACL condition has been extended: it is now possible to supply
602 a list of IP addresses and/or domains to be looked up in a particular DNS
603 domain.
60539. Added log_selector=+queue_time_overall.
60740. When running the queue in the test harness, wait just a tad after forking a
608 delivery process, to get repeatability of debugging output.
61041. Include certificate and key file names in error message when GnuTLS fails
611 to set them up, because the GnuTLS error message doesn't include the name
612 of the failing file when there is a problem reading it.
61442. Allow both -bf and -bF in the same test run.
61643. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
61844. The "Exiscan patch" is now merged into the mainline Exim source.
62045. Sometimes the final signoff response after QUIT could fail to get
621 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
622 < 0 before doing a fflush(). This bug looks as though it goes back to the
623 introduction of TLS in release 3.20, but "sometimes" must have been rare
624 because the tests only now provoked it.
62646. Reset the locale to "C" after calling embedded Perl, in case it was changed
627 (this can affect the format of dates).
62947. exim_tidydb, when checking for the continued existence of a message for
630 which it has found a message-specific retry record, was not finding
631 messages that were in split spool directories. Consequently, it was
632 deleting retry records that should have stayed in existence.
63448. Steve fixed some bugs in eximstats.
63649. The SPA authentication driver was not abandoning authentication and moving
637 on to the next authenticator when an expansion was forced to fail,
638 contradicting the general specification for all authenticators. Instead it
639 was generating a temporary error. It now behaves as specified.
64150. The default ordering of permitted cipher suites for GnuTLS was pessimal
642 (the order specifies the preference for clients). The order is now AES256,
643 AES128, 3DES, ARCFOUR128.
64551. Small patch to Sieve code - explicitly set From: when generating an
646 autoreply.
64852. Exim crashed if a remote delivery caused a very long error message to be
649 recorded - for instance if somebody sent an entire SpamAssassin report back
650 as a large number of 550 error lines. This bug was coincidentally fixed by
651 increasing the size of one of Exim's internal buffers (big_buffer) that
652 happened as part of the Exiscan merge. However, to be on the safe side, I
653 have made the code more robust (and fixed the comments that describe what
654 is going on).
65653. Now that there can be additional text after "Completed" in log lines (if
657 the queue_time_overall log selector is set), a one-byte patch to exigrep
658 was needed to allow it to recognize "Completed" as not the last thing in
659 the line.
66154. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
662 patch that reportedly fixes this has been added. I am not expert enough to
663 create a test for it. This is what the patch creator wrote:
665 "I found a little strange behaviour of ldap code when working with
666 Windows 2003 AD Domain, where users was placed in more than one
667 Organization Units. When I tried to give exim partial DN, the exit code
668 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
669 But simultaneously result of request was absolutely normal ldap result,
670 so I produce this patch..."
672 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
673 REFERENCE, so I have modified the code to exclude the patch when that macro
674 is not defined.
67655. Some experimental protocols are using DNS PTR records for new purposes. The
677 keys for these records are domain names, not reversed IP addresses. The
678 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
679 leaves it alone. Component reversal etc. now happens only for IP addresses.
ea3a6f44 680 CAN-2005-0021
7102e136 681
68256. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
68457. Double the size of the debug message buffer (to 2048) so that more of very
685 long debug lines gets shown.
68758. The exicyclog utility now does better if the number of log files to keep
688 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
69059. Two changes related to the smtp_active_hostname option:
692 (1) $smtp_active_hostname is now available as a variable.
693 (2) The default for smtp_banner uses $smtp_active_hostname instead
694 of $primary_hostname.
69660. The host_aton() function is supposed to be passed a string that is known
697 to be a valid IP address. However, in the case of IPv6 addresses, it was
698 not checking this. This is a hostage to fortune. Exim now panics and dies
699 if the condition is not met. A case was found where this could be provoked
700 from a dnsdb PTR lookup with an IPv6 address that had more than 8
701 components; fortuitously, this particular loophole had already been fixed
702 by change 4.50/55 above.
704 If there are any other similar loopholes, the new check in host_aton()
705 itself should stop them being exploited. The report I received stated that
706 data on the command line could provoke the exploit when Exim was running as
707 exim, but did not say which command line option was involved. All I could
708 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
709 running as the user.
ea3a6f44 710 CAN-2005-0021
71261. There was a buffer overflow vulnerability in the SPA authentication code
713 (which came originally from the Samba project). I have added a test to the
714 spa_base64_to_bits() function which I hope fixes it.
ea3a6f44 715 CAN-2005-0022
b975ba52 716
71762. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
718 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
72063. The daemon start-up calls getloadavg() while still root for those OS that
721 need the first call to be done as root, but it missed one case: when
722 deliver_queue_load_max is set with deliver_drop_privilege. This is
723 necessary for the benefit of the queue runner, because there is no re-exec
724 when deliver_drop_privilege is set.
72664. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
727 This has been fixed.
72965. Caching of lookup data for "hosts =" ACL conditions, when a named host list
730 was in use, was not putting the data itself into the right store pool;
731 consequently, it could be overwritten for a subsequent message in the same
732 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
733 the caching.)
73566. Added hosts_max_try_hardlimit to the smtp transport, default 50.
73767. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
738 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
739 the function were treating the return as a boolean value, which happened to
740 work because 0=false and not-0=true, but is not correct code.
74268. The host_aton() function was not handling scoped IPv6 addresses (those
743 with, for example, "%eth0" on the end) correctly.
74569. Fixed some compiler warnings in acl.c for the bitmaps specified with
746 negated items (that is, ~something) in unsigned ints. Some compilers
747 apparently mutter when there is no cast.
74970. If an address verification called from an ACL failed, and did not produce a
750 user-specific message (i.e. there was only a "system" message), nothing was
751 put in $acl_verify_message. In this situation, it now puts the system
752 message there.
75471. Change 4.23/11 added synchronization checking at the start of an SMTP
755 session; change 4.31/43 added the unwanted input to the log line - except
756 that it did not do this in the start of session case. It now does.
75872. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
759 This is wrong and can cause the other end to generate a synchronization
760 error if it is another Exim or anything else that does the synchronization
761 check. A QUIT command is no longer sent after a timeout.
76373. $host_lookup_deferred has been added, to make it easier to detect DEFERs
764 during host lookups.
76674. The defer_ok option of callout verification was not working if it was used
767 when verifying addresses in header lines, that is, for this case:
769 verify = header_sender/callout=defer_ok
77175. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
772 those file descriptors could be used for SMTP connections. If anything
773 wrote to stderr (the example that came up was "warn" in embedded Perl), it
774 could be sent to the SMTP client, causing chaos. The daemon now opens
775 stdin, stdout, and stderr to /dev/null when it puts itself into the
776 background.
77876. Arrange for output from Perl's "warn" command to be written to Exim's main
779 log by default. The user can override this with suitable Perl magic.
78177. The use of log_message on a "discard" ACL verb, which is supposed to add to
782 the log message when discard triggers, was not working for the DATA ACL or
783 for the non-SMTP ACL.
78578. Error message wording change in sieve.c.
78779. If smtp_accept_max_per_host was set, the number of connections could be
788 restricted to fewer than expected, because the daemon was trying to set up
789 a new connection before checking whether the processes handling previous
790 connections had finished. The check for completed processes is now done
791 earlier. On busy systems, this bug wouldn't be noticed because something
792 else would have woken the daemon, and it would have reaped the completed
793 process earlier.
79580. If a message was submitted locally by a user whose login name contained one
796 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
797 It caused a spool format error. I have fixed the spool reading code. A
798 related problem was that the "from" clause in the Received: line became
799 illegal because of the space(s). It is now covered by ${quote_local_part.
80181. Included the latest eximstats from Steve (adds average sizes to HTML Top
802 tables).
80482. Updated OS/Makefile-AIX as per message from Mike Meredith.
80683. Patch from Sieve maintainer to fix unterminated string problem in
807 "vacation" handling.
80984. Some minor changes to the Linux configuration files to help with other
810 OS variants using glibc.
81285. One more patch for Sieve to update vacation handling to latest spec.
495ae4b0 814
816See the note above about the 4.44 and 4.50 releases.
820Exim version 4.44
823 1. Change 4.43/35 introduced a bug that caused file counts to be
824 incorrectly computed when quota_filecount was set in an appendfile
825 transport
827 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
828 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
829 place.
831 3. Give more explanation in the error message when the command for a transport
832 filter fails to execute.
834 4. There are several places where Exim runs a non-Exim command in a
835 subprocess. The SIGUSR1 signal should be disabled for these processes. This
836 was being done only for the command run by the queryprogram router. It is
837 now done for all such subprocesses. The other cases are: ${run, transport
838 filters, and the commands run by the lmtp and pipe transports.
840 5. Some older OS have a limit of 256 on the maximum number of file
841 descriptors. Exim was using setrlimit() to set 1000 as a large value
842 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
843 systems. I've change it so that if it can't get 1000, it tries for 256.
845 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
846 was an oversight, and furthermore, ever since the addition of extra
847 controls (e.g. 4.43/32), the checks on when to allow different forms of
848 "control" were broken. There should now be diagnostics for all cases when a
849 control that does not make sense is encountered.
851 7. $recipients is now available in the predata ACL (oversight).
853 8. Tidy the search cache before the fork to do a delivery from a message
854 received from the command line. Otherwise the child will trigger a lookup
855 failure and thereby defer the delivery if it tries to use (for example) a
856 cached ldap connection that the parent has called unbind on.
858 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
859 of $address_data from the recipient verification was clobbered by the
860 sender verification.
86210. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
863 was its contents. (It was OK if the option was not defined at all.)
86511. A "Completed" log line is now written for messages that are removed from
866 the spool by the -Mrm option.
86812. $host_address is now set to the target address during the checking of
869 ignore_target_hosts.
87113. When checking ignore_target_hosts for an ipliteral router, no host name was
872 being passed; this would have caused $sender_host_name to have been used if
873 matching the list had actually called for a host name (not very likely,
874 since this list is usually IP addresses). A host name is now passed as
875 "[x.x.x.x]".
87714. Changed the calls that set up the SIGCHLD handler in the daemon to use the
878 code that specifies a non-restarting handler (typically sigaction() in
879 modern systems) in an attempt to fix a rare and obscure crash bug.
88115. Narrowed the window for a race in the daemon that could cause it to ignore
882 SIGCHLD signals. This is not a major problem, because they are used only to
883 wake it up if nothing else does.
88516. A malformed maildirsize file could cause Exim to calculate negative values
886 for the mailbox size or file count. Odd effects could occur as a result.
887 The maildirsize information is now recalculated if the size or filecount
888 end up negative.
89017. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
891 support for a long time. Removed HAVE_SYS_VFS_H.
ea3a6f44 89318. Updated exipick to current release from John Jetmore.
89519. Allow an empty sender to be matched against a lookup in an address list.
896 Previously the only cases considered were a regular expression, or an
897 empty pattern.
89920. Exim went into a mad DNS lookup loop when doing a callout where the
900 host was specified on the transport, if the DNS lookup yielded more than
901 one IP address.
90321. The RFC2047 encoding function was originally intended for short strings
904 such as real names; it was not keeping to the 75-character limit for
905 encoded words that the RFC imposes. It now respects the limit, and
906 generates multiple encoded words if necessary. To be on the safe side, I
907 have increased the buffer size for the ${rfc2047: expansion operator from
908 1024 to 2048 bytes.
bbe902f0 909
91022. Failure to deliver a bounce message always caused it to be frozen, even if
911 there was an errors_to setting on the router. The errors_to setting is now
912 respected.
91423. If an IPv6 address is given for -bh or -bhc, it is now converted to the
915 canonical form (fully expanded) before being placed in
916 $sender_host_address.
91824. Updated eximstats to version 1.33
92025. Include certificate and key file names in error message when GnuTLS fails
921 to set them up, because the GnuTLS error message doesn't include the name
922 of the failing file when there is a problem reading it.
92426. Expand error message when OpenSSL has problems setting up cert/key files.
ea3a6f44 925 As per change 25.
bbe902f0 926
92727. Reset the locale to "C" after calling embedded Perl, in case it was changed
928 (this can affect the format of dates).
bbe902f0 929
93028. exim_tidydb, when checking for the continued existence of a message for
931 which it has found a message-specific retry record, was not finding
932 messages that were in split spool directories. Consequently, it was
933 deleting retry records that should have stayed in existence.
93529. eximstats updated to version 1.35
936 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
937 1.35 - bugfix such that pie charts by volume are generated correctly
93930. The SPA authentication driver was not abandoning authentication and moving
940 on to the next authenticator when an expansion was forced to fail,
941 contradicting the general specification for all authenticators. Instead it
942 was generating a temporary error. It now behaves as specified.
bbe902f0 943
94431. The default ordering of permitted cipher suites for GnuTLS was pessimal
945 (the order specifies the preference for clients). The order is now AES256,
946 AES128, 3DES, ARCFOUR128.
bbe902f0 947
94831. Small patch to Sieve code - explicitly set From: when generating an
949 autoreply.
bbe902f0 950
95132. Exim crashed if a remote delivery caused a very long error message to be
952 recorded - for instance if somebody sent an entire SpamAssassin report back
953 as a large number of 550 error lines. This bug was coincidentally fixed by
954 increasing the size of one of Exim's internal buffers (big_buffer) that
955 happened as part of the Exiscan merge. However, to be on the safe side, I
956 have made the code more robust (and fixed the comments that describe what
957 is going on).
bbe902f0 958
95933. Some experimental protocols are using DNS PTR records for new purposes. The
960 keys for these records are domain names, not reversed IP addresses. The
961 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
962 leaves it alone. Component reversal etc. now happens only for IP addresses.
963 CAN-2005-0021
96534. The host_aton() function is supposed to be passed a string that is known
966 to be a valid IP address. However, in the case of IPv6 addresses, it was
967 not checking this. This is a hostage to fortune. Exim now panics and dies
968 if the condition is not met. A case was found where this could be provoked
969 from a dnsdb PTR lookup with an IPv6 address that had more than 8
970 components; fortuitously, this particular loophole had already been fixed
971 by change 4.50/55 or 4.44/33 above.
973 If there are any other similar loopholes, the new check in host_aton()
974 itself should stop them being exploited. The report I received stated that
975 data on the command line could provoke the exploit when Exim was running as
976 exim, but did not say which command line option was involved. All I could
977 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
978 running as the user.
979 CAN-2005-0021
98135. There was a buffer overflow vulnerability in the SPA authentication code
982 (which came originally from the Samba project). I have added a test to the
983 spa_base64_to_bits() function which I hope fixes it.
984 CAN-2005-0022
98636. The daemon start-up calls getloadavg() while still root for those OS that
987 need the first call to be done as root, but it missed one case: when
988 deliver_queue_load_max is set with deliver_drop_privilege. This is
989 necessary for the benefit of the queue runner, because there is no re-exec
990 when deliver_drop_privilege is set.
bbe902f0 991
99237. Caching of lookup data for "hosts =" ACL conditions, when a named host list
993 was in use, was not putting the data itself into the right store pool;
994 consequently, it could be overwritten for a subsequent message in the same
995 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
996 the caching.)
bbe902f0 997
99838. Sometimes the final signoff response after QUIT could fail to get
999 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1000 < 0 before doing a fflush(). This bug looks as though it goes back to the
1001 introduction of TLS in release 3.20, but "sometimes" must have been rare
1002 because the tests only now provoked it.
1005Exim version 4.43
1008 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
1009 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
1010 Now it returns an integer. A number of calls were still expecting a T/F
1011 return. Fortuitously, in all cases, the tests worked in OK situations,
1012 which is the norm. However, things would have gone wrong on any write
1013 failures on the smtp file descriptor. This function is used when sending
1014 messages over SMTP and also when doing verify callouts.
1016 2. When Exim is called to do synchronous delivery of a locally submitted
1017 message (the -odf or -odi options), it no longer closes stderr before doing
1018 the delivery.
1020 3. Implemented the mua_wrapper option.
1022 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1024 5. Implemented the functions header_remove(), header_testname(),
1025 header_add_at_position(), and receive_remove_recipient(), and exported them
1026 to local_scan().
1028 6. If an ACL "warn" statement specified the addition of headers, Exim already
1029 inserted X-ACL-Warn: at the start if there was no header name. However, it
1030 was not making this test for the second and subsequent header lines if
1031 there were newlines in the string. This meant that an invalid header could
1032 be inserted if Exim was badly configured.
1034 7. Allow an ACL "warn" statement to add header lines at the start or after all
1035 the Received: headers, as well as at the end.
1037 8. Added the rcpt_4xx retry error code.
1039 9. Added postmaster_mailfrom=xxx to callout verification option.
104110. Added mailfrom=xxxx to the callout verification option, for verify=
1042 header_sender only.
104411. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1045 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
104712. Inserted some casts to stop certain compilers warning when using pointer
1048 differences as field lengths or precisions in printf-type calls (mostly
1049 affecting debugging statements).
105113. Added optional readline() support for -be (dynamically loaded).
105314. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1054 same clock tick as a message's arrival, so that its received time was the
1055 same as the "first fail" time on the retry record, and that message
1056 remained on the queue past the ultimate address timeout, every queue runner
1057 would try a delivery (because it was past the ultimate address timeout) but
1058 after another failure, the ultimate address timeout, which should have then
1059 bounced the address, did not kick in. This was a "< instead of <=" error;
1060 in most cases the first failure would have been in the next clock tick
1061 after the received time, and all would be well.
106315. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1064 being recognized when the domain list was tested by the match_domain
1065 condition in an expansion string.
106716. Added the ${str2b64: operator.
106917. Exim was always calling setrlimit() to set a large limit for the number of
1070 processes, without checking whether the existing limit was already
1071 adequate. (It did check for the limit on file descriptors.) Furthermore,
1072 errors from getrlimit() and setrlimit() were being ignored. Now they are
1073 logged to the main and panic logs, but Exim does carry on, to try to do its
1074 job under whatever limits there are.
107618. Imported PCRE 5.0.
107819. Trivial typo in log message " temporarily refused connection" (the leading
1079 space).
108120. If the log selector return_path_on_delivery was set and an address was
1082 redirected to /dev/null, the delivery process crashed because it assumed
1083 that a return path would always be set for a "successful" delivery. In this
1084 case, the whole delivery is bypassed as an optimization, and therefore no
1085 return path is set.
108721. Internal re-arrangement: the function for sending a challenge and reading
1088 a response while authentication was assuming a zero-terminated challenge
1089 string. It's now changed to take a pointer and a length, to allow for
1090 binary data in such strings.
109222. Added the cyrus_sasl authenticator (code supplied by MBM).
109423. Exim was not respecting finduser_retries when seeking the login of the
1095 uid under which it was called; it was always trying 10 times. (The default
1096 setting of finduser_retries is zero.) Also, it was sleeping after the final
1097 failure, which is pointless.
109924. Implemented tls_on_connect_ports.
110125. Implemented acl_smtp_predata.
110326. If the domain in control=submission is set empty, Exim assumes that the
1104 authenticated id is a complete email address when it generates From: or
1105 Sender: header lines.
110727. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1108 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1109 chown and chgrp in /bin and hostname in /usr/bin.
111128. Exim was keeping the "process log" file open after each use, just as it
1112 does for the main log. This opens the possibility of it remaining open for
1113 long periods when the USR1 signal hits a daemon. Occasional processlog
1114 errors were reported, that could have been caused by this. Anyway, it seems
1115 much more sensible not to leave this file open at all, so that is what now
1116 happens.
111829. The long-running daemon process does not normally write to the log once it
1119 has entered its main loop, and it closes the log before doing so. This is
1120 so that log files can straightforwardly be renamed and moved. However,
1121 there are a couple of unusual error situations where the daemon does write
1122 log entries, and I had neglected to close the log afterwards.
112430. The text of an SMTP error response that was received during a remote
1125 delivery was being truncated at 512 bytes. This is too short for some of
1126 the long messages that one sometimes sees. I've increased the limit to
1127 1024.
112931. It is now possible to make retry rules that apply only when a message has a
1130 specific sender, in particular, an empty sender.
113232. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1133 it possible to be selective about when SMTP synchronization is enforced.
113533. Added "control = caseful_local_part" and "control = "caselower_local_part".
113732. Implemented hosts_connection_nolog.
113933. Added an ACL for QUIT.
114134. Setting "delay_warning=" to disable warnings was not working; it gave a
1142 syntax error.
114435. Added mailbox_size and mailbox_filecount to appendfile.
114636. Added control = no_multiline_responses to ACLs.
114837. There was a bug in the logic of the code that waits for the clock to tick
1149 in the case where the clock went backwards by a substantial amount such
1150 that the microsecond fraction of "now" was more than the microsecond
1151 fraction of "then" (but the whole seconds number was less).
115338. Added support for the libradius Radius client library this is found on
1154 FreeBSD (previously only the radiusclient library was supported).
1157Exim version 4.42
1160 1. When certain lookups returned multiple values in the form name=value, the
1161 quoting of the values was not always being done properly. Specifically:
1162 (a) If the value started with a double quote, but contained no whitespace,
1163 it was not quoted.
1164 (b) If the value contained whitespace other than a space character (i.e.
1165 tabs or newlines or carriage returns) it was not quoted.
1166 This fix has been applied to the mysql and pgsql lookups by writing a
1167 separate quoting function and calling it from the lookup code. The fix
1168 should probably also be applied to nisplus, ibase and oracle lookups, but
1169 since I cannot test any of those, I have not disturbed their existing code.
1171 2. A hit in the callout cache for a specific address caused a log line with no
1172 reason for rejecting RCPT. Now it says "Previous (cached) callout
1173 verification failure".
1175 3. There was an off-by-one bug in the queryprogram router. An over-long
1176 return line was truncated at 256 instead of 255 characters, thereby
1177 overflowing its buffer with the terminating zero. As well as fixing this, I
1178 have increased the buffer size to 1024 (and made a note to document this).
1180 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1181 when Exim is waiting for an SMTP response from a remote server, Exim
1182 restarts its select() call on the socket, thereby resetting its timeout.
1183 This is not a problem when such interrupts are rare. Somebody set up a cron
1184 job to run exiwhat every 2 minutes, which is less than the normal select()
1185 timeout (5 or 10 minutes). This meant that the select() timeout never
1186 kicked in because it was always reset. I have fixed this by comparing the
1187 time when an interrupt arrives with the time at the start of the first call
1188 to select(). If more time than the timeout has elapsed, the interrupt is
1189 treated as a timeout.
1191 5. Some internal re-factoring in preparation for the addition of Sieve
1192 extensions (by MH). In particular, the "personal" test is moved to a
1193 separate function, and given an option for scanning Cc: and Bcc: (which is
1194 not set for Exim filters).
1196 6. When Exim created an email address using the login of the caller as the
1197 local part (e.g. when creating a From: or Sender: header line), it was not
1198 quoting the local part when it contained special characters such as @.
1200 7. Installed new OpenBSD configuration files.
1202 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1203 try to make them clearer.
1205 9. Callout options, other than the timeout value, were being ignored when
1206 verifying sender addresses in header lines. For example, when using
1208 verify = header_sender/callout=no_cache
1210 the cache was (incorrectly) being used.
121210. Added a missing instance of ${EXE} to the exim_install script; this affects
1213 only the Cygwin environment.
121511. When return_path_on_delivery was set as a log selector, if different remote
1216 addresses in the same message used different return paths and parallel
1217 remote delivery occurred, the wrong values would sometimes be logged.
1218 (Whenever a remote delivery process finished, the return path value from
1219 the most recently started remote delivery process was logged.)
122112. RFC 3848 specifies standard names for the "with" phrase in Received: header
1222 lines when AUTH and/or TLS are in use. This is the "received protocol"
1223 field. Exim used to use "asmtp" for authenticated SMTP, without any
1224 indication (in the protocol name) for TLS use. Now it follows the RFC and
1225 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1226 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1227 names appear in log lines as well as in Received: header lines.
122913. Installed MH's patches for Sieve to add the "copy" and "vacation"
1230 extensions, and comparison tests, and to fix some bugs.
123214. Changes to the "personal" filter test:
1234 (1) The test was buggy in that it was just doing the equivalent of
1235 "contains" tests on header lines. For example, if a user's address was
1236 anne@some.where, the "personal" test would incorrectly be true for
1238 To: susanne@some.where
1240 This test is now done by extracting each address from the header in turn,
1241 and checking the entire address. Other tests that are part of "personal"
1242 are now done using regular expressions (for example, to check local parts
1243 of addresses in From: header lines).
1245 (2) The list of non-personal local parts in From: addresses has been
1246 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1247 taken from the Sieve specification recommendations.
1249 (3) If the message contains any header line starting with "List-" it is
1250 treated as non-personal.
1252 (4) The test for "circular" in the Subject: header line has been removed
1253 because it now seems ill-conceived.
125515. Minor typos in src/EDITME comments corrected.
125716. Installed latest exipick from John Jetmore.
125917. If headers_add on a router specified a text string that was too long for
1260 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1261 of string_sprintf() is now avoided.
126318. $message_body_size was not set (it was always zero) when running the DATA
1264 ACL and the local_scan() function.
126619. For the "mail" command in an Exim filter, no default was being set for
1267 the once_repeat time, causing a random time value to be used if "once" was
1268 specified. (If the value happened to be <= 0, no repeat happened.) The
1269 default is now 0s, meaning "never repeat". The "vacation" command was OK
1270 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1271 (I found it when inspecting the code).
127320. There is now an overall timeout for performing a callout verification. It
1274 defaults to 4 times the callout timeout, which applies to individual SMTP
1275 commands during the callout. The overall timeout applies when there is more
1276 than one host that can be tried. The timeout is checked before trying the
1277 next host. This prevents very long delays if there are a large number of
1278 hosts and all are timing out (e.g. when the network connections are timing
1279 out). The value of the overall timeout can be changed by specifying an
1280 additional sub-option for "callout", called "maxwait". For example:
1282 verify = sender/callout=5s,maxwait=20s
128421. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1285 to the end before writing, but this should make it even safer).
128722. Exim was forgetting that it had advertised PIPELINING for the second and
1288 subsequent messages on an SMTP connection. It was also not resetting its
1289 memory on STARTTLS and an internal HELO.
129123. When Exim logs an SMTP synchronization error within a session, it now
1292 records whether PIPELINING has been advertised or not.
129424. Added 3 instances of "(long int)" casts to time_t variables that were being
1295 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1296 rather than long int.
129825. Installed the latest Cygwin configuration files from the Cygwin maintainer.
130026. Added the never_mail option to autoreply.
1303Exim version 4.41
1306 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1307 crash if the getsockname() call failed; this can happen if a connection is
1308 closed very soon after it is established. The problem was simply in the
1309 order in which certain operations were done, causing Exim to try to write
1310 to the SMTP stream before it had set up the file descriptor. The bug has
1311 been fixed by making things happen in the correct order.
1314Exim version 4.40
1317 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1318 before the connection was closed, thus losing the rejection response.
1320 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1321 some early Solaris releases, but causes trouble in current releases where
1322 socklen_t is defined.
1324 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1325 always exist.
1327 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1328 configured.
1330 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1331 that releasing the top of it at the end releases what was used for sub-
1332 expansions (unless the block got too big). However, discard this block if
1333 the first thing is a variable or header, so that we can use its block when
1334 it is dynamic (useful for very large $message_headers, for example).
1336 6. Lookups now cache *every* query, not just the most recent. A new, separate
1337 store pool is used for this. It can be recovered when all lookup caches are
1338 flushed. Lookups now release memory at the end of their result strings.
1339 This has involved some general refactoring of the lookup sources.
1341 7. Some code has been added to the store_xxx() functions to reduce the amount
1342 of flapping under certain conditions.
1344 8. log_incoming_interface used to affect only the <= reception log lines. Now
1345 it causes the local interface and port to be added to several more SMTP log
1346 lines, for example "SMTP connection from", and rejection lines.
1348 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
135010. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
135211. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1353 could be overwritten at the end of the current message (or the start of a
1354 new message if it was set in a HELO ACL). The value is now preserved for
1355 the duration of the SMTP connection.
135712. If a transport had a headers_rewrite setting, and a matching header line
1358 contained an unqualified address, that address was qualified, even if it
1359 did not match any rewriting rules. The underlying bug was that the values
1360 of the flags that permit the existence of unqualified sender and recipient
1361 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1362 non-local messages, and by -bnq for local messages) were not being
1363 preserved with the message after it was received.
136513. When Exim was logging an SMTP synchronization error, it could sometimes log
1366 "next input=" as part of the text comprising the host identity instead of
1367 the correct text. The code was using the same buffer for two different
1368 strings. However, depending on which order the printing function evaluated
1369 its arguments, the bug did not always show up. Under Linux, for example, my
1370 test suite worked just fine.
137214. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1373 doesn't work with some older versions of Perl. It has been changed to "my",
1374 which in any case is probably the better facility to use.
137615. A really picky compiler found some instances of statements for creating
1377 error messages that either had too many or two few arguments for the format
1378 string.
138016. The size of the buffer for calls to the DNS resolver has been increased
1381 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1382 for addresses that have a lot of PTR records. This alleviates a problem; it
1383 does not fully solve it.
138517. A dnsdb lookup for PTR records that receives more data than will fit in the
1386 buffer now truncates the list and logs the incident, which is the same
1387 action as happens when Exim is looking up a host name and its aliases.
1388 Previously in this situation something unpredictable would happen;
1389 sometimes it was "internal error: store_reset failed".
139118. If a server dropped the connection unexpectedly when an Exim client was
1392 using GnuTLS and trying to read a response, the client delivery process
1393 crashed while trying to generate an error log message.
139519. If a "warn" verb in an ACL added multiple headers to a message in a single
1396 string, for example:
1398 warn message = H1: something\nH2: something
1400 the text was added as a single header line from Exim's point of view
1401 though it ended up OK in the delivered message. However, searching for the
1402 second and subsequent header lines using $h_h2: did not work. This has been
1403 fixed. Similarly, if a system filter added multiple headers in this way,
1404 the routers could not see them.
140620. Expanded the error message when iplsearch is called with an invalid key to
1407 suggest using net-iplsearch in a host list.
140921. When running tests using -bh, any delays imposed by "delay" modifiers in
1410 ACLs are no longer actually imposed (and a message to that effect is
1411 output).
141322. If a "gecos" field in a passwd entry contained escaped characters, in
1414 particular, if it contained a \" sequence, Exim got it wrong when building
1415 a From: or a Sender: header from that name. A second bug also caused
1416 incorrect handling when an unquoted " was present following a character
1417 that needed quoting.
141923. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1420 was not being matched caselessly.
142224. Arranged for all hyphens in the exim.8 source to be escaped with
1423 backslashes.
142525. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1426 properly. Recipient callout cache records were still being keyed to include
1427 the sender, even when use_sender was set false. This led to far more
1428 callouts that were necessary. The sender is no longer included in the key
1429 when use_sender is false.
143126. Added "control = submission" modifier to ACLs.
143327. Added the ${base62d: operator to decode base 62 numbers.
143528. dnsdb lookups can now access SRV records.
143729. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1438 the configuration file.
144030. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1441 (-v) mode. This makes the output for a verbose queue run more intelligible.
144331. Added a use_postmaster feature to recipient callouts.
144532. Added the $body_zerocount variable, containing the number of binary zero
1446 bytes in the message body.
144833. The time of last modification of the "new" subdirectory is now used as the
1449 "mailbox time last read" when there is a quota error for a maildir
1450 delivery.
145234. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
145435. Added +ignore_unknown as a special item in host lists.
145636. Code for decoding IPv6 addresses in host lists is now included, even if
1457 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1458 address was recognized as an IP address, but was then not correctly decoded
1459 into binary, causing unexpected and incorrect effects when compared with
1460 another IP address.
1463Exim version 4.34
1466 1. Very minor rewording of debugging text in manualroute to say "list of
1467 hosts" instead of "hostlist".
1469 2. If verify=header_syntax was set, and a header line with an unqualified
1470 address (no domain) and a large number of spaces between the end of the
1471 name and the colon was received, the reception process suffered a buffer
1472 overflow, and (when I tested it) crashed. This was caused by some obsolete
1473 code that should have been removed. The fix is to remove it!
1475 3. When running in the test harness, delay a bit after writing a bounce
1476 message to get a bit more predictability in the log output.
1478 4. Added a call to search_tidyup() just before forking a reception process. In
1479 theory, someone could use a lookup in the expansion of smtp_accept_max_
1480 per_host which, without the tidyup, could leave open a database connection.
1482 5. Added the variables $recipient_data and $sender_data which get set from a
1483 lookup success in an ACL "recipients" or "senders" condition, or a router
1484 "senders" option, similar to $domain_data and $local_part_data.
1486 6. Moved the writing of debug_print from before to after the "senders" test
1487 for routers.
1489 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1490 problems for message scanning, either using a data ACL, or using
1491 local_scan() because the Received: header was not generated till after they
1492 were called (in order to set the time as the time of reception completion).
1493 I have revised the way this works. The header is now generated after the
1494 body is received, but before the ACL or local_scan() are called. After they
1495 are run, the timestamp in the header is updated.
1498Exim version 4.33
1501 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1502 before starting a queue runner without re-exec. This happened only when
1503 deliver_drop_privilege was set or when the Exim user was set to root. The
1504 effect of the bug was that timeouts during subsequent deliveries caused
1505 crashes instead of being properly handled. The handler is now left at its
1506 default (and expected) setting.
1508 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1509 message, again when deliver_drop_privilege is set or Exim is run as root.
1510 The bug described in (1) was not present in this case, but the tidying up
1511 of the other signals was missing. I have made the two cases consistent.
1513 3. The ignore_target_hosts setting on a manualroute router was being ignored
1514 for hosts that were looked up using the /MX notation.
1516 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1517 in domain lists.
1519 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1520 operated on the sender address. After changing the $sender_address to <>
1521 for the sender address verify, Exim was re-instated it as the original
1522 (before rewriting) address, but remembering that it had rewritten it, so it
1523 wasn't rewriting it again. This bug also had the effect of breaking the
1524 sender address verification caching when the sender address was rewritten.
1526 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1527 This has been changed so that if the ip literal address matches
1528 ignore_target_hosts, the router declines.
1530 7. Added expansion conditions match_domain, match_address, and match_local_
1531 part (NOT match_host).
1533 8. The placeholder for the Received: header didn't have a length field set.
1535 9. Added code to Exim itself and to exim_lock to test for a specific race
1536 condition that could lead to file corruption when using MBX delivery. The
1537 issue is with the lockfile that is created in /tmp. If this file is removed
1538 after a process has opened it but before that process has acquired a lock,
1539 there is the potential for a second process to recreate the file and also
1540 acquire a lock. This could lead to two Exim processes writing to the file
1541 at the same time. The added code performs the same test as UW imapd; it
1542 checks after acquiring the lock that its file descriptor still refers to
1543 the same named file.
154510. The buffer for building added header lines was of fixed size, 8192 bytes.
1546 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1547 when Exim is built.
154911. Added the smtp_active_hostname option. If used, this will typically be made
1550 to depend on the incoming interface address. Because $interface_address is
1551 not set up until the daemon has forked a reception process, error responses
1552 that can happen earlier (such as "too many connections") no longer contain
1553 a host name.
155512. If an expansion in a condition on a "warn" statement fails because a lookup
1556 defers, the "warn" statement is abandoned, and the next ACL statement is
1557 processed. Previously this caused the whole ACL to be aborted.
155913. Added the iplsearch lookup type.
156114. Added ident_timeout as a log selector.
156315. Added tls_certificate_verified as a log selector.
156516. Added a global option tls_require_ciphers (compare the smtp transport
1566 option of the same name). This controls incoming TLS connections.
156817. I finally figured out how to make tls_require_ciphers do a similar thing
1569 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1570 before starting the TLS session.
157218. Tabs are now shown as \t in -bP output.
157419. If the log selector return_path_on_delivery was set, Exim crashed when
1575 bouncing a message because it had too many Received: header lines.
157720. If two routers both had headers_remove settings, and the first one included
1578 a superfluous trailing colon, the final name in the first list and the
1579 first name in the second list were incorrectly joined into one item (with a
1580 colon in the middle).
1583Exim version 4.32
1586 1. Added -C and -D options to the exinext utility, mainly to make it easier
1587 to include in the automated testing, but these could be helpful when
1588 multiple configurations are in use.
1590 2. The exinext utility was not formatting the output nicely when there was
1591 an alternate port involved in the retry record key, nor when there was a
1592 message id as well (for retries that were specific to a specific message
1593 and a specific host). It was also confused by IPv6 addresses, because of
1594 the additional colons they contain. I have fixed the IPv4 problem, and
1595 patched it up to do a reasonable job for IPv6.
1597 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1598 delivery, the log line now contains "pipelined" if PIPELINING was used.
1600 4. An SMTP transport process used to panic and die if the bind() call to set
1601 an explicit outgoing interface failed. This has been changed; it is now
1602 treated in the same way as a connect() failure.
1604 5. A reference to $sender_host_name in the part of a conditional expansion
1605 that was being skipped was still causing a DNS lookup. This no longer
1606 occurs.
1608 6. The def: expansion condition was not recognizing references to header lines
1609 that used bh_ and bheader_.
1611 7. Added the _cache feature to named lists.
1613 8. The code for checking quota_filecount in the appendfile transport was
1614 allowing one more file than it should have been.
1616 9. For compatibility with Sendmail, the command line option
1618 -prval:sval
1620 is equivalent to
1622 -oMr rval -oMs sval
1624 and sets the incoming protocol and host name (for trusted callers). The
1625 host name and its colon can be omitted when only the protocol is to be set.
1626 Note the Exim already has two private options, -pd and -ps, that refer to
1627 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1628 "s", but I don't think that's a major issue.
163010. A number of refactoring changes to the code, none of which should affect
1631 Exim's behaviour:
1633 (a) The number of logging options was getting close to filling up the
1634 32-bit word that was used as a bit map. I have split them into two classes:
1635 those that are passed in the argument to log_write(), and those that are
1636 only ever tested independently outside of that function. These are now in
1637 separate 32-bit words, so there is plenty of room for expansion again.
1638 There is no change in the user interface or the logging behaviour.
1640 (b) When building, for example, log lines, the code previously used a
1641 macro that called string_cat() twice, in order to add two strings. This is
1642 not really sufficiently general. Furthermore, there was one instance where
1643 it was actually wrong because one of the argument was used twice, and in
1644 one call a function was used. (As it happened, calling the function twice
1645 did not affect the overall behaviour.) The macro has been replaced by a
1646 function that can join an arbitrary number of extra strings onto a growing
1647 string.
1649 (c) The code for expansion conditions now uses a table and a binary chop
1650 instead of a serial search (which was left over from when there were very
1651 few conditions). Also, it now recognizes conditions like "pam" even when
1652 the relevant support is not compiled in: a suitably worded error message is
1653 given if an attempt is made to use such a condition.
165511. Added ${time_interval:xxxxx}.
165712. A bug was causing one of the ddress fields not to be passed back correctly
1658 from remote delivery subprocesses. The field in question was not being
1659 subsequently used, so this caused to problems in practice.
166113. Added new log selectors queue_time and deliver_time.
166314. Might have fixed a bug in maildirsizefile handling that threw up
1664 "unexpected character" debug warnings, and recalculated the data
1665 unnecessarily. In any case, I expanded the warning message to give more
1666 information.
166815. Added the message "Restricted characters in address" to the statements in
1669 the default ACL that block characters like @ and % in local parts.
167116. Change 71 for release 4.31 proved to be much less benign that I imagined.
1672 Three changes have been made:
1674 (a) There was a serious bug; a negative response to MAIL caused the whole
1675 recipient domain to be cached as invalid, thereby blocking all messages
1676 to all local parts at the same domain, from all senders. This bug has
1677 been fixed. The domain is no longer cached after a negative response to
1678 MAIL if the sender used is not empty.
1680 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1681 been restored.
1683 (c) A new callout option, "use_sender" has been added for people who want
1684 the modified behaviour.
1687Exim version 4.31
1690 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1691 Larry Rosenman.
1693 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1694 indeed breaks things for older releases.
1696 3. Added additional logging to the case where there is a problem reading data
1697 from a filter that is running in a subprocess using a pipe, in order to
1698 try to track down a specific problem.
1700 4. Testing facility fudge: when running in the test harness and attempting
1701 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1702 getting "No route to host". Convert this to a timeout.
1704 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1705 warning.
1707 6. Some OS don't have socklen_t but use size_t instead. This affects the
1708 fifth argument of getsockopt() amongst other things. This is now
1709 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1710 can be set for individual OS. I have set it for SunOS5, OSF1, and
1711 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1712 some earlier ones do not.
1714 7. Change 4.30/15 was not doing the test caselessly.
1716 8. The standard form for an IPv6 address literal was being rejected by address
1717 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1718 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1719 this, as well as the form without the "IPv6" on the front (but only when
1720 address literals are enabled, of course).
1722 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
172410. Exim crashed if a message with an empty sender address specified by -f
1725 encountered a router with an errors_to setting. This could be provoked only
1726 by a command such as
1728 exim -f "" ...
1730 where an empty string was supplied; "<>" did not hit this bug.
173211. Installed PCRE release 4.5.
173412. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1735 remained set. It is now erased.
173713. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1738 times from message ids (which are base 36 rather than the normal 62).
174014. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1741 were being counted as actual protocol errors, and logged if the log
1742 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1743 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1744 and DATA following a set of rejected RCPTs do not count as protocol errors.
1745 In other words, Exim assumes they were pipelined, though this may not
1746 actually be the case. Of course, in all cases the client gets an
1747 appropriate error code.
174915. If a lookup fails in an ACL condition, a message about the failure may
1750 be available; it is used if testing the ACL cannot continue, because most
1751 such messages specify what the cause of the deferral is. However, some
1752 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1753 that caused an old message to be retained and used if a later statement
1754 caused a defer, replacing the real cause of the deferral.
175616. If an IP address had so many PTR records that the DNS lookup buffer
1757 was not large enough to hold them, Exim could crash while trying to process
1758 the truncated data. It now detects and logs this case.
176017. Further to 4.21/58, another change has been made: if (and only if) the
1761 first line of a message (the first header line) ends with CRLF, a bare LF
1762 in a subsequent header line has a space inserted after it, so as not to
1763 terminate the header.
176518. Refactoring: tidied an ugly bit of code in appendfile that copied data
1766 unnecessarily, used atoi() instead of strtol(), and didn't check the
1767 termination when getting file sizes from file names by regex.
176919. Completely re-implemented the support for maildirsize files, in the light
1770 of a number of problems with the previous contributed implementation
1771 (4.30/29). In particular:
1773 . If the quota is zero, the maildirsize file is maintained, but no quota is
1774 imposed.
1776 . If the maildir directory does not exist, it is created before any attempt
1777 to write a maildirsize file.
1779 . The quota value in the file is just a cache; if the quota is changed in
1780 the transport, the new value overrides.
1782 . A regular expression is available for excluding directories from the
1783 count.
178520. The autoreply transport checks the characters in options that define the
1786 message's headers; it allows continued headers, but it was checking with
1787 isspace() after an embedded newline instead of explicitly looking for a
1788 space or a tab.
179021. If all the "regular" hosts to which an address was routed had passed their
1791 expiry times, and had not reached their retry times, the address was
1792 bounced, even if fallback hosts were defined. Now Exim should go on to try
1793 the fallback hosts.
179522. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1796 equivalent code in the SMTP transport. Some hosts send humungous responses
1797 to HELO/EHLO, more than 1024 it seems.
179923. Refactoring: code in filter.c used (void *) for "any old type" but this
1800 gives compiler warnings in some environments. I've now done it "properly",
1801 using a union.
180324. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1804 (because of problems with the built-in one) was declared to return uschar *
1805 instead of char *, causing compiler failure.
180725. Fixed a file descriptor leak when processing alias/forward files.
180926. Fixed a minor format string issue in dbfn.c.
181127. Typo in exim.c: ("dmbnz" for "dbmnz").
181328. If a filter file refered to $h_xxx or $message_headers, and the headers
1814 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1815 become corrupted.
181729. When a sender address is verified, it is cached, to save repeating the test
1818 when there is more than one recipient in a message. However, when the
1819 verification involves a callout, it is possible for different callout
1820 options to be set for different recipients. It is too complicated to keep
1821 track of this in the cache, so now Exim always runs a verification when a
1822 callout is required, relying on the callout cache for the optimization.
1823 The overhead is duplication of the address routing, but this should not be
1824 too great.
182630. Fixed a bug in callout caching. If a RCPT command caused the sender address
1827 to be verified with callout=postmaster, and the main callout worked but the
1828 postmaster check failed, the verification correctly failed. However, if a
1829 subsequent RCPT command asked for sender verification *without* the
1830 postmaster check, incorrect caching caused this verification also to fail,
1831 incorrectly.
183331. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
1834 it was not caching the DNS options (qualify_single, search_parents) that
1835 were used when the lookup failed. A subsequent lookup with different
1836 options therefore always gave the same answer, though there were cases
1837 where it should not have. (Example: a "domains = !$mx_any" option on a
1838 dnslookup router: the "domains" option is always processed without any
1839 widening, but the router might have qualify_single set.) Now Exim uses the
1840 cached value only when the same options are set.
184232. Added John Jetmore's "exipick" utility to the distribution.
184433. GnuTLS: When an attempt to start a TLS session fails for any reason other
1845 than a timeout (e.g. a certificate is required, and is not provided), an
1846 Exim server now closes the connection immediately. Previously it waited for
1847 the client to close - but if the client is SSL, it seems that they each
1848 wait for each other, leading to a delay before one of them times out.
185034: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
1851 maintained 0.8.x compatibility because I don't think many are using it, and
1852 it is clearly obsolete.
185435. Added TLS support for CRLs: a tls_crl global option and one for the smtp
1855 transport.
185736. OpenSSL: $tls_certificate_verified was being set to 1 even if the
1858 client certificate was expired. A simple patch fixes this, though I don't
1859 understand the full logic of why the verify callback is called multiple
1860 times.
186237. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
1863 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
1864 which causes problems with some clients (such as the Certicom SSL Plus
1865 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
1866 disables the coutermeasure allowing Eudora to connect."
186838. Exim was not checking that a write() to a log file succeeded. This could
1869 lead to Bad Things if a log got too big, in particular if it hit a file
1870 size limit. Exim now panics and dies if it cannot write to a log file, just
1871 as it does if it cannot open a log file.
187339. Modified OS/Makefile-Linux so that it now contains
1877 The two -D definitions ensure that Exim is compiled with large file
1878 support, which makes it possible to handle log files that are bigger than
1879 2^31.
188140. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
1882 instance) a domain was checked against a named list that involved a lookup,
1883 causing $domain_data to be set, then another domain was checked against the
1884 same list, then the first domain was re-checked, the value of $domain_data
1885 after the final check could be wrong. In particular, if the second check
1886 failed, it could be set empty. This bug probably also applied to
1887 $localpart_data.
188941. The strip_trailing_dot option was not being applied to the address given
1890 with the -f command-line option.
189242. The code for reading a message's header from the spool was incrementing
1893 $received_count, but never initializing it. This meant that the value was
1894 incorrect (doubled) while delivering a message in the same process in which
1895 it was received. In the most common configuration of Exim, this never
1896 happens - a fresh exec is done - but it can happen when
1897 deliver_drop_privilege is set.
189943. When Exim logs an SMTP synchronization error - client data sent too soon -
1900 it now includes up to 150 characters of the unexpected data in the log
1901 line.
190344. The exim_dbmbuild utility uses fixed size buffers for reading input lines
1904 and building data strings. The size of both of these buffers was 10 000
1905 bytes - far larger than anybody would *ever* want, thought I. Needless to
1906 say, somebody hit the limit. I have increased the maximum line length to
1907 20 000 and the maximum data length of concatenated lines to 100 000. I have
1908 also fixed two bugs, because there was no checking on these buffers. Tsk,
1909 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
1910 buffer is too small.
191245. The exim_dbmbuild utility did not support quoted keys, as Exim does in
1913 lsearch lookups. Now it does.
191546. When parsing a route_list item in a manualroute router, a fixed-length
1916 buffer was used for the list of hosts. I made this 1024 bytes long,
1917 thinking that nobody would ever have a list of hosts that long. Wrong.
1918 Somebody had a whole pile of complicated expansion conditions, and the
1919 string was silently truncated, leading to an expansion error. It turns out
1920 that it is easier to change to an unlimited length (owing to other changes
1921 that have happened since this code was originally written) than to build
1922 structure for giving a limitation error. The length of the item that
1923 expands into the list of hosts is now unlimited.
192547. The lsearch lookup could not handle data where the length of text line was
1926 more than 4095 characters. Such lines were truncated, leading to shortened
1927 data being returned. It should now handle lines of any length.
192948. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
1930 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
1931 ACL").
193349. Cosmetic tidy to scripts like exicyclog that are generated by globally
1934 replacing strings such as BIN_DIRECTORY in a source file: the replacement
1935 no longer happens in comment lines. A list of replacements is now placed
1936 at the head of all of the source files, except those whose only change is
1937 to replace PERL_COMMAND in the very first #! line.
193950. Replaced the slow insertion sort in queue.c, for sorting the list of
1940 messages on the queue, with a bottom-up merge sort, using code contributed
1941 by Michael Haardt. This should make operations like -bp somewhat faster on
1942 large queues. It won't affect queue runners, except when queue_run_in_order
1943 is set.
194551. Installed eximstats 1.31 in the distribution.
194752. Added support for SRV lookups to the dnslookup router.
194953. If an ACL referred to $message_body or $message_body_end, the value was not
1950 reset for any messages that followed in the same SMTP session.
195254. The store-handling optimization for building very long strings was not
1953 differentiating between the different store pools. I don't think this
1954 actually made any difference in practice, but I've tidied it.
195655. While running the routers to verify a sender address, $sender_address
1957 was still set to the sender address. This is wrong, because when routing to
1958 send a bounce to the sender, it would be empty. Therefore, I have changed
1959 it so that, while verifying a sender address, $sender_address is set to <>.
1960 (There is no change to what happens when verifying a recipient address.)
196256. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
1963 target A or AAAA records (if not already returned) without resetting the
1964 qualify_single or search_parents options of the DNS resolver. These are
1965 inappropriate in this case because the targets of MX and SRV records must
1966 be FQDNs. A broken DNS record could cause trouble if it happened to have a
1967 target that, when qualified, matched something in the local domain. These
1968 two options are now turned off when doing these lookups.
197057. It seems that at least some releases of Reiserfs (which does not have the
1971 concept of a fixed number of inodes) returns zero and not -1 for the
1972 number of available inodes. This interacted badly with check_spool_inodes,
1973 which assumed that -1 was the "no such thing" setting. What I have done is
1974 to check that the total number of inodes is greater than zero before doing
1975 the test of how many are available.
197758. When a "warn" ACL statement has a log_message modifier, the message is
1978 remembered, and not repeated. This is to avoid a lot of repetition when a
1979 message has many recipients that cause the same warning to be written.
1980 Howewer, Exim was preserving the list of already written lines for an
1981 entire SMTP session, which doesn't seem right. The memory is now reset if a
1982 new message is started.
198459. The "rewrite" debugging flag was not showing the result of rewriting in the
1985 debugging output unless log_rewrite was also set.
198760. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
1988 of (int)(handle) when we know that handle contains (void *)(-1).
199061. The Exim daemon panic-logs an error return when it closes the incoming
1991 connection. However "connection reset by peer" seems to be common, and
1992 isn't really an error worthy of noting specially, so that particular error
1993 is no long logged.
199562. When Exim is trying to find all the local interfaces, it used to panic and
1996 die if the ioctl to get the interface flags failed. However, it seems that
1997 on at least one OS (Solaris 9) it is possible to have an interface that is
1998 included in the list of interfaces, but for which you get a failure error
1999 for this call. This happens when the interface is not "plumbed" into a
2000 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
2001 failure of the "get flags" call assumes that the interface is down.
200363. Added a ${eval10: operator, which assumes all numbers are decimal. This
2004 makes life easier for people who are doing arithmetic on fields extracted
2005 from dates, where you often get leading zeros that should not be
2006 interpreted as octal.
200864. Added qualify_domain to the redirect router, to override the global
2009 setting.
201165. If a pathologically long header line contained very many addresses (the
2012 report of this problem mentioned 10 000) and each of them was rewritten,
2013 Exim could use up a very large amount of memory. (It kept on making new
2014 copies of the header line as it rewrote, and never released the old ones.)
2015 At the expense of a bit more processing, the header rewriting function has
2016 been changed so that it no longer eats memory in this way.
201866. The generation of the Received: header has been moved from the time that a
2019 message starts to be received, to the time that it finishes. The timestamp
2020 in the Received: header should now be very close to that of the <= log
2021 line. There are two side-effects of this change:
2023 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2024 logged header lines no longer include the local Received: line, because
2025 it has not yet been created. The same applies to a copy of the message
2026 that is returned to a non-SMTP sender when a message is rejected.
2028 (b) When a filter file is tested using -bf, no additional Received: header
2029 is added to the test message. After some thought, I decided that this
2030 is a bug fix.
2032 This change does not affect the value of $received_for. It is still set
2033 after address rewriting, but before local_scan() is called.
203567. Installed the latest Cygwin-specific files from the Cygwin maintainer.
203768. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2038 gave an unhelpful panic error message, and a defer error. I have managed to
2039 change this behaviour so that it now rejects any supplied certificate,
2040 which seems right, as the list of acceptable certificates is empty.
204269. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2043 gave an unhelpful defer error. I have not managed to make this reject any
2044 supplied certificates, but the error message it gives is "no certificate
2045 supplied", which is not helpful.
204770. exigrep's output now also includes lines that are not associated with any
2048 message, but which match the given pattern. Implemented by a patch from
2049 Martin Sluka, which also tidied up the Perl a bit.
205171. Recipient callout verification, like sender verification, was using <> in
2052 the MAIL FROM command. This isn't really the right thing, since the actual
2053 sender may affect whether the remote host accepts the recipient or not. I
2054 have changed it to use the actual sender in the callout; this means that
2055 the cache record is now keyed on a recipient/sender pair, not just the
2056 recipient address. There doesn't seem to be a real danger of callout loops,
2057 since a callout by the remote host to check the sender would use <>.
2058 [SEE ABOVE: changed after hitting problems.]
206072. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2061 temporary errors. However, in the case of such a code being given after
2062 the end of a data transmission (i.e. after ".") Exim was failing to write
2063 a retry record for the message. (Yes, there was some broken host that was
2064 actually sending 8xx at this point.)
206673. An unknown lookup type in a host list could cause Exim to panic-die when
2067 the list was checked. (An example that provoked this was putting <; in the
2068 middle of a list instead of at the start.) If this happened during a DATA
2069 ACL check, a -D file could be left lying around. This kind of configuration
2070 error no longer causes Exim to die; instead it causes a defer errror. The
2071 incident is still logged to the main and panic logs.
207374. Buglet left over from Exim 3 conversion. The message "too many messages
2074 in one connection" was written to the rejectlog but not the mainlog, except
2075 when address rewriting (yes!) was being logged.
207775. Added write_rejectlog option.
207976. When a system filter was run not as root (that is, when system_filter_user
2080 was set), the values of the $n variables were not being returned to the
2081 main process; thus, they were not subsequently available in the $sn
2082 variables.
208477. Added +return_path_on_delivery log selector.
208678. A connection timeout was being treated differently from recipients deferred
2087 when testing hosts_max_try with a message that was older than the host's
2088 retry timeout. (The host should not be counted, thus allowing all hosts to
2089 be tried at least once before bouncing.) This may have been the cause of an
2090 occasionally reported bug whereby a message would remain on the queue
2091 longer than the retry timeout, but would be bounced if a delivery was
2092 forced. I say "may" because I never totally pinned down the problem;
2093 setting up timeout/retry tests is difficult. See also the next item.
209579. The ultimate address timeout was not being applied to errors that involved
2096 a combination of host plus message (for example, a timeout on a MAIL
2097 command). When an address resolved to a number of possible hosts, and they
2098 were not all tried for each delivery (e.g. because of hosts_max_try), a
2099 message could remain on the queue longer than the retry timeout.
210180. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2102 Haardt.
210481. Fixed an obscure SMTP outgoing bug which required at least the following
2105 conditions: (a) there was another message waiting for the same server;
2106 (b) the server returned 5xx to all RCPT commands in the first message so
2107 that the message was not completed; (c) the server dropped the connection
2108 or gave a negative response to the RSET that Exim sends to abort the
2109 transaction. The observed case was a dropped connection after DATA that had
2110 been sent in pipelining mode. That is, the server had advertised PIPELINING
2111 but was not implementing it correctly. The effect of the bug was incorrect
2112 behaviour, such as trying another host, and this could lead to a crash.
2115Exim version 4.30
2118 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2119 and daemon.c were passed as pointers to ints; they should have been
2120 pointers to socklen_t variables (which are typically unsigned ints).
2122 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2123 fixed.
2125 3. Fixed a really odd bug that affected only the testing scheme; patching a
2126 certain fixed string in the binary changed the value of another string that
2127 happened to be identical to the end of the original first string.
2129 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2130 name", it returns that address as the IP address. On some operating
2131 systems (e.g. Solaris), it also passes back the IP address string as the
2132 "host name". However, on others (e.g. Linux), it passes back an empty
2133 string. Exim wasn't checking for this, and was changing the host name to an
2134 empty string, assuming it had been canonicized.
2136 5. Although rare, it is permitted to have more than one PTR record for a given
2137 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2138 all the names associated with an address, because they do in Solaris.
2139 However, it seems that they do not in Linux for data that comes from the
2140 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2141 I found this out when I moved to a new Linux workstation and tried to run
2142 the Exim test suite.
2144 To get round this problem I have changed the code so that it now does its
2145 own call to the DNS to look up PTR records when searching for a host name.
2146 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2147 addresses that are only in /etc/hosts are still found.
2149 This behaviour is, however, controlled by an option called host_lookup_
2150 order, which defaults to "bydns:byaddr". If people want to use the other
2151 order, or indeed, just use one or the other means of lookup, they can
2152 specify it in this variable.
2154 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2155 some operating systems, this comes back from gethostbyaddr() as an empty
2156 string, and this is what Exim used to test for. However, it seems that in
2157 other systems, "." is yielded. Exim now tests for this case too.
2159 7. The values of check_spool_space and check_log_space are now held internally
2160 as a number of kilobytes instead of an absolute number of bytes. If a
2161 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2162 kilobyte. This means that much larger values can be stored.
2164 8. Exim monitor: an attempt to get the action menu when not actually pointing
2165 at a message produces an empty menu entitled "No message selected". This
2166 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2167 no entries in it ("Shell widget menu has zero width and/or height"). So I
2168 have added a single, blank menu entry in this case.
2170 9. Added ${quote_local_part.
217210. MIME decoding is now applied to the contents of Subject: header lines when
2173 they are logged.
217511. Now that a reference to $sender_host_address automatically causes a reverse
2176 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2177 host lookup before query-style lookups in lists that might use this
2178 variable. This has therefore been abolished, and the "net-" prefix is no
2179 longer necessary for query-style lookups.
218112. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2182 have been a typo for LFLAGS, so it has been changed.
218413. The install script calls Exim with "-C /dev/null" in order to find the
2185 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2186 to be output. Howeve, since Exim outputs its version number before the
2187 error, it didn't break the script. It just looked ugly. I fixed this by
2188 always allowing "-C /dev/null" if the caller is root.
219014. Ignore overlarge ACL variable number when reading spool file - insurance
2191 against a later release with more variables having written the file.
219315. The standard form for an IPv6 address literal was being rejected by EHLO.
2194 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2195 this, as well as the form without the "IPv6" on the front.
219716. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2198 OS/Makefile-Darwin file.
220017. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2201 only to LDAP libraries that do not have LDAP_OPT_DEREF.
220318. After change 4.21/52, "%ld" was used to format the contents of the $inode
2204 variable. However, some OS use ints for inodes. I've added cast to long int
2205 to get rid of the compiler warning.
220719. I had forgotten to lock out "/../" in configuration file names when
2208 ALT_CONFIG_PREFIX was set.
221020. Routers used for verification do not need to specify transports. However,
2211 if such a router generated a host list, and callout was configured, Exim
2212 crashed, because it could not find a port number from the (non-existent)
2213 transport. It now assumes port 25 in this circumstance.
221521. Added the -t option to exigrep.
221722. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2218 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2219 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2220 them is set, LOOKUP_LSEARCH is forced.
222223. "exim -bV" now outputs a list of lookups that are included in the binary.
222424. Added sender and host information to the "rejected by local_scan()" log
2225 line; previously there was no indication of these.
222725. Added .include_if_exists.
222926. Change 3.952/11 added an explicit directory sync on top of a file sync for
2230 Linux. It turns out that not all file systems support this. Apparently some
2231 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2232 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2233 not supported on the file descriptor, is now ignored when Exim is trying to
2234 sync a directory. This applies only to Linux.
223627. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
223828. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2239 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2240 this.
224229. Added support for maildirsize files from supplied patch (modified a bit).
224430. The use of :fail: followed by an empty string could lead Exim to respond to
2245 sender verification failures with (e.g.):
2247 550 Verification failed for <xxx>
2248 550 Sender verify failed
2250 where the first response line was missing the '-' that indicates it is not
2251 the final line of the response.
225331. The loop for finding the name of the user that called Exim had a hardwired
2254 limit of 10; it now uses the value of finduser_retries, which is used for
2255 all other user lookups.
225732. Added $received_count variable, available in data and not_smtp ACLs, and at
2258 delivery time.
226033. Exim was neglecting to zero errno before one call of strtol() when
2261 expanding a string and expecting an integer value. On some systems this
2262 resulted in spurious "integer overflow" errors. Also, it was casting the
2263 result into an int without checking.
226534. Testing for a connection timeout using "timeout_connect" in the retry rules
2266 did not work. The code looks as if it has *never* worked, though it appears
2267 to have been documented since at least releast 1.62. I have made it work.
226935. The "timeout_DNS" error in retry rules, also documented since at least
2270 1.62, also never worked. As it isn't clear exactly what this means, and
2271 clearly it isn't a major issue, I have abolished the feature by treating it
2272 as "timeout", and writing a warning to the main and panic logs.
227436. The display of retry rules for -brt wasn't always showing the error code
2275 correctly.
227737. Added new error conditions to retry rules: timeout_A, timeout_MX,
2278 timeout_connect_A, timeout_connect_MX.
228038. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2281 to the empty sender.
228339. The daemon was not analysing the content of -oX till after it had closed
2284 stderr and disconnected from the controlling terminal. This meant that any
2285 syntax errors were only noted on the panic log, and the return code from
2286 the command was 0. By re-arranging the code a little, I've made the
2287 decoding happen first, so such errors now appear on stderr, and the return
2288 code is 1. However, the actual setting up of the sockets still happens in
2289 the disconnected process, so errors there are still only recorded on the
2290 panic log.
229240. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2293 connections (as happens on some IP stacks) was logged at start up time as
2294 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2295 it from "IPv6 and IPv4", which means that two separate sockets are being
2296 used.
229841. The debug output for gethostbyname2() or getipnodebyname() failures now
2299 says whether AF_INET or AF_INET6 was passed as an argument.
230142. Exiwhat output was messed up when time zones were included in log
2302 timestamps.
230443. Exiwhat now gives more information about the daemon's listening ports,
2305 and whether -tls-on-connect was used.
230744. The "port" option of the smtp transport is now expanded.
230945. A "message" modifier in a "warn" statement in a non-message ACL was being
2310 silently ignored. Now an error message is written to the main and panic
2311 logs.
231346. There's a new ACL modifier called "logwrite" which writes to a log file
2314 as soon as it is encountered.
231647. Added $local_user_uid and $local_user_gid at routing time.
231848. Exim crashed when trying to verify a sender address that was being
2319 rewritten to "<>".
232149. Exim was recognizing only a space character after ".include". It now also
2322 recognizes a tab character.
232450. Fixed several bugs in the Perl script that creates the exim.8 man page by
2325 extracting the relevant information from the specification. The man page no
2326 longer contains scrambled data for the -d option, and I've added a section
2327 at the front about calling Exim under different names.
232951. Added "extra_headers" argument to the "mail" command in filter files.
233152. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2332 crash.
233453. Installed eximstats 1.29.
233654. Added transport_filter_timeout as a generic transport option.
233855. Exim no longer adds an empty Bcc: header to messages that have no To: or
2339 Cc: header lines. This was required by RFC 822, but it not required by RFC
2340 2822.
234256. Exim used to add From:, Date:, and Message-Id: header lines to any
2343 incoming messages that did not have them. Now it does so only if the
2344 message originates locally, that is, if there is no associated remote host
2345 address. When Resent- header lines are present, this applies to the Resent-
2346 lines rather than the non-Resent- lines.
234857. Drop incoming SMTP connection after too many syntax or protocol errors. The
2349 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
235158. Messages for configuration errors now include the name of the main
2352 configuration file - useful now that there may be more than one file in a
2353 list (.included file names were always shown).
235559. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2356 for those rare installations that do not start the daemon as root or run it
2357 setuid root. I've cut out the call to initgroups() if the daemon is not
2358 root at that time.
236060. The Exim user and group can now be bound into the binary as text strings
2361 that are looked up at the start of Exim's processing.
236361. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
236562. Added $mailstore_basename variable.
236763. Installed patch to sieve.c from Michael Haardt.
236964. When Exim failed to open the panic log after failing to open the main log,
2370 the original message it was trying to log was written to stderr and debug
2371 output, but if they were not available (the usual case in production), it
2372 was lost. Now it is written to syslog before the two lines that record the
2373 failures to open the logs.
237565. Users' Exim filters run in subprocesses under the user's uid. It is
2376 possible for a "deliver" command or an alias in a "personal" command to
2377 provoke an address rewrite. If logging of address rewriting is configured,
2378 this fails because the process is not running as root or exim. There may be
2379 a better way of dealing with this, but for the moment (because 4.30 needs
2380 to be released), I have disabled address rewrite logging when running a
2381 filter in a non-root, non-exim process.
2384Exim version 4.24
2387 1. The buildconfig auxiliary program wasn't quoting the value set for
2388 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2389 not defined. This bug was masked in 4.22 by the effect that was fixed in
2390 change 4.23/1.
2392 2. Some messages that were rejected after a message id was allocated were
2393 shown as "incomplete" by exigrep. It no longer does this for messages that
2394 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2396 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2397 have allow_domain_literals set, the ID did not get logged in the <= line.
2398 Domain literals are now always recognized in Message-ID: header lines.
2400 4. The first argument for a ${extract expansion item is the key name or field
2401 number. Leading and trailing spaces in this item were not being ignored,
2402 causing some misleading effects.
2404 5. When deliver_drop_privilege was set, single queue runner processes started
2405 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2406 same command in the process it spins off) were not dropping privilege.
2408 6. When the daemon running as "exim" started a queue runner, it always
2409 re-executed Exim in the spun-off process. This is a waste of effort when
2410 deliver_drop_privilege is set. The new process now just calls the
2411 queue-runner function directly.
2414Exim version 4.23
2417 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2420 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2421 ignored. Though the use of -oP was forcing the writing of a pid file, it
2422 was always written to the default place.
2424 3. If the message "no IP address found for host xxxx" is generated during
2425 incoming verification, it is now followed by identification of the incoming
2426 connection (so you can more easily find what provoked it).
2428 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2430 5. Added some features to "harden" Exim a bit more against certain attacks:
2432 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2433 be put in Local/Makefile. This is like the never_users runtime option,
2434 but it cannot be overridden. The default setting is "root".
2436 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2437 prefix string with which any file named in a -C command line option
2438 must start.
2440 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2441 is retained for -C and -D only if the caller of Exim is root. Without
2442 it, the exim user may also use -C and -D and retain privilege.
2444 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2445 command line option is disabled.
2447 6. Macro names set by the -D option must start with an upper case letter, just
2448 like macro names defined in the configuration file.
2450 7. Added "dereference=" facility to LDAP.
2452 8. Two instances of the typo "uknown" in the source files are fixed.
2454 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2455 the Configure-Makefile script screwed up while processing it.
245710. Incorporated PCRE 4.4.
245911. The SMTP synchronization check was not operating right at the start of an
2460 SMTP session. For example, it could not catch a HELO sent before the client
2461 waited for the greeting. There is now a check for outstanding input at the
2462 point when the greeting is written. Because of the duplex, asynchronous
2463 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2464 way, but not yet received, when the check is performed.
246612. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2467 on TCP/IP sockets, because this apparently causes some broken clients to
2468 timeout.
247013. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2471 unchanged) from the Cygwin maintainer.
247314. The code for -bV that shows what is in the binary showed "mbx" when maildir
2474 was supported instead of testing for mbx. Effectively a typo.
247615. The spa authenticator server code was not checking that the input it
2477 received was valid base64.
247916. The debug output line for the "set" modifier in ACLs was not showing the
2480 name of the variable that was being set.
248217. Code tidy: the variable type "vtype_string" was never used. Removed it.
248418. Previously, a reference to $sender_host_name did not cause a DNS reverse
2485 lookup on its own. Something else was needed to trigger the lookup. For
2486 example, a match in host_lookup or the need for a host name in a host list.
2487 Now, if $sender_host_name is referenced and the host name has not yet been
2488 looked up, a lookup is performed. If the lookup fails, the variable remains
2489 empty, and $host_lookup_failed is set to "1".
249119. Added "eqi" as a case-independent comparison operator.
249320. The saslauthd authentication condition could segfault if neither service
2494 nor realm was specified.
249621. If an overflowing value such as "2048M" was set for message_size_limit, the
2497 error message that was logged was misleading, and incoming SMTP
2498 connections were dropped. The message is now more accurate, and temporary
2499 errors are given to SMTP connections.
250122. In some error situations (such as 21 above) Exim rejects all SMTP commands
2502 (except RSET) with a 421 error, until QUIT is received. However, it was
2503 failing to send a response to QUIT.
250523. The HELO ACL was being run before the code for helo_try_verify_hosts,
2506 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2507 ACL is now run after the helo_try_verify_hosts code.
250924. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2510 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2511 case-independent, so other case variants are also recognized). Apparently
2512 some systems use these upper case variants.
251425. If more than two messages were waiting for the same host, and a transport
2515 filter was specified for the transport, Exim sent two messages over the
2516 same TCP/IP connection, and then failed with "socket operation on non-
2517 socket" when it tried to send the third.
251926. Added Exim::debug_write and Exim::log_write for embedded Perl use.
252127. The extern definition of crypt16() in expand.c was not being excluded when
2522 the OS had its own crypt16() function.
252428. Added bounce_return_body as a new option, and bounce_return_size_limit
2525 as a preferred synonym for return_size_limit, both as an option and as an
2526 expansion variable.
252829. Added LIBS=-liconv to OS/Makefile-OSF1.
253030. Changed the default configuration ACL to relax the local part checking rule
2531 for addresses that are not in any local domains. For these addresses,
2532 slashes and pipe symbols are allowed within local parts, but the sequence
2533 /../ is explicitly forbidden.
253531. SPA server authentication was not clearing the challenge buffer before
2536 using it.
253832. log_message in a "warn" ACL statement was writing to the reject log as
2539 well as to the main log, which contradicts the documentation and doesn't
2540 seem right (because no rejection is happening). So I have stopped it.
254233. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2543 However, I am unable to do any testing of this.
254534. Fixed an infelicity in the appendfile transport. When checking directories
2546 for a mailbox, to see if any needed to be created, it was accidentally
2547 using path names with one or more superfluous leading slashes; tracing
2548 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
255035. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2551 contents are added to the log line that is written for every discarded
2552 recipient. (Previously a log_message setting was ignored.)
255436. The ${quote: operator now quotes the string if it is empty.
255637. The install script runs exim in order to find its version number. If for
2557 some reason other than non-existence or emptiness, which it checks, it
2558 could not run './exim', it was installing it with an empty version number,
2559 i.e. as "exim-". This error state is now caught, and the installation is
2560 aborted.
256238. An argument was missing from the function that creates an error message
2563 when Exim fails to connect to the socket for saslauthd authentication.
2564 This could cause Exim to crash, or give a corrupted message.
256639. Added isip, isip4, and isip6 to ${if conditions.
256840. The ACL variables $acl_xx are now saved with the message, and can be
2569 accessed later in routers, transports, and filters.
257141. The new lookup type nwildlsearch is like wildlsearch, except that the key
2572 strings in the file are not string-expanded.
257442. If a MAIL command specified a SIZE value that was too large to fit into an
2575 int variable, the check against message_size_limit failed. Such values are
2576 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2577 day this will have to be increased, but I don't think I want to be around
2578 when emails are that large.
2582Exim version 4.22
2585 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2586 iconv() is not standard in FreeBSD.
2588 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2589 IPv6 enabled. The observed symptom was a segmentation fault on return from
2590 the function os_common_find_running_interfaces() in src/os.c.
2592 3. In the check_special_case() function in daemon.c I had used "errno" as an
2593 argument name, which causes warnings on some systems. This was basically a
2594 typo, since it was named "eno" in the comments!
2596 4. The code that waits for the clock to tick (at a resolution of some fraction
2597 of a second) so as to ensure message-id uniqueness was always waiting for
2598 at least one whole tick, when it could have waited for less. [This is
2599 almost certainly not relevant at current processor speeds, where it is
2600 unlikely to ever wait at all. But we try to future-proof.]
2602 5. The function that sleeps for a time interval that includes fractions of a
2603 second contained a race. It did not block SIGALRM between setting the
2604 timer, and suspending (a couple of lines later). If the interval was short
2605 and the sigsuspend() was delayed until after it had expired, the suspension
2606 never ended. On busy systems this could lead to processes getting stuck for
2607 ever.
2609 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2610 process, before it forks any delivery processes. The open lookup caching
2611 mechanism meant that the open file or database connection was passed into
2612 the delivery process. The problem was that delivery processes always tidy
2613 up cached lookup data. This could cause a problem for the next delivery
2614 process started by the queue runner, because the external queue runner
2615 process does not know about the closure. So the next delivery process
2616 still has data in the lookup cache. In the case of a file lookup, there was
2617 no problem because closing a file descriptor in a subprocess doesn't affect
2618 the parent. However, if the lookup was caching a connection to a database,
2619 the connection was closed, and the second delivery process was likely to
2620 see errors such as "PGSQL: query failed: server closed the connection
2621 unexpectedly". The problem has been fixed by closing all cached lookups
2622 in a queue runner before running a delivery process.
2624 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2625 seem to have the "const" qualifier which it has on other OS. I've
2626 parameterised it.
2628 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2629 *of the same type* (client or server) with the same public name that an
2630 error should be diagnosed.
2632 9. When Exim looked up a host name for an IP address, but failed to find the
2633 original IP address when looking up the host name (a safety check), it
2634 output the message "<ip address> does not match any IP for NULL", which was
2635 confusing, to say the least. The bug was that the host name should have
2636 appeared instead of "NULL".
263810. Since release 3.03, if Exim is called by a uid other than root or the Exim
2639 user that is built into the binary, and the -C or -D options is used, root
2640 privilege is dropped before the configuration file is read. In addition,
2641 logging is switched to stderr instead of the normal log files. If the
2642 configuration then re-defines the Exim user, the unprivileged environment
2643 is probably not what is expected, so Exim logs a panic warning message (but
2644 proceeds).
2646 However, if deliver_drop_privilege is set, the unprivileged state may well
2647 be exactly what is intended, so the warning has been cut out in that case,
2648 and Exim is allowed to try to write to its normal log files.
2651Exim version 4.21
2654 1. smtp_return_error_details was not giving details for temporary sender
2655 or receiver verification errors.
2657 2. Diagnose a configuration error if two authenticators have the same public
2658 name.
2660 3. Exim used not to create the message log file for a message until the first
2661 delivery attempt. This could be confusing when incoming messages were held
2662 for policy or load reasons. The message log file is now created at the time
2663 the message is received, and an initial "Received" line is written to it.
2665 4. The automatically generated man page for command line options had a minor
2666 bug that caused no ill effects; however, a more serious problem was that
2667 the procedure for building the man page automatically didn't always
2668 operate. Consequently, release 4.20 contains an out-of-date version. This
2669 shouldn't happen again.
2671 5. When building Exim with embedded Perl support, the script that builds the
2672 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2673 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2675 6. The freeze_tell option was not being used for messages that were frozen on
2676 arrival, either by an ACL or by local_scan().
2678 7. Added the smtp_incomplete_transaction log selector.
2680 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2681 was accepting AUTH without a new EHLO.
2683 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2684 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2685 RFC.
268710. Logging of TCP/IP connections (when configured) now happens in the main
2688 daemon process instead of the child process, so that the TCP/IP connection
2689 count is more accurate (but it can never be perfect).
269111. The use of "drop" in a nested ACL was not being handled correctly in the
2692 outer ACL. Now, if condition failure induced by the nested "drop" causes
2693 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2694 or "require"), the connection is dropped.
269612. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2697 that yield "discard" can now be used with an "accept" or a "discard" verb,
2698 but an error is generated for any others (because I can't see a useful way
2699 to define what should happen).
270113. When an ACL is read dynamically from a file (or anywhere else), the lines
2702 are now processed in the same way as lines in the Exim configuration file.
2703 In particular, continuation lines are supported.
270514. Added the "dnslists = a.b.c!=n.n.n.n" feature.
270715. Added -ti meaning -t -i.
270916. Check for letters, digits, hyphens, and dots in the names of dnslist
2710 domains, and warn by logging if others are found.
271217. At least on BSD, alignment is not guarenteed for the array of ifreq's
2713 returned from GIFCONF when Exim is trying to find the list of interfaces on
2714 a host. The code in os.c has been modified to copy each ifreq to an aligned
2715 structure in all cases.
2717 Also, in some cases, the returned ifreq's were being copied to a 'struct
2718 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2719 means the last couple of bytes of an IPv6 address could be chopped if the
2720 ifreq contained only a normal sockaddr (14 bytes storage).
272218. Named domain lists were not supported in the hosts_treat_as_local option.
2723 An entry such as +xxxx was not recognized, and was treated as a literal
2724 domain name.
272619. Ensure that header lines added by a DATA ACL are included in the reject log
2727 if the ACL subsequently rejects the message.
272920. Upgrade the utility script to use Digest::MD5 instead of just
2730 MD5 (which is deprecated).
273221. When testing a filter file using -bf, Exim was writing a message when it
2733 took the sender from a "From " line in the message, but it was not doing so
2734 when it took $return_path from a Return-Path: header line. It now does.
273622. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2737 with a valid header line field name (a series of printing characters
2738 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
274023. Changed "disc" in the source to "disk" to conform to the documentation and
2741 the book and for uniformity.
274324. Ignore Sendmail's -Ooption=value command line item.
274525. When execve() failed while trying to run a command in a pipe transport,
2746 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2747 could be confused with a return value of 69 from the command itself. This
2748 has been changed to 127, the value the shell returns if it is asked to run
2749 a non-existent command. The wording for the related log line suggests a
2750 non-existent command as the problem.
275226. If received_header_text expands to an empty string, do not add a Received:
2753 header line to the message. (Well, it adds a token one on the spool, but
2754 marks it "old" so that it doesn't get used or transmitted.)
275627. Installed eximstats 1.28 (addition of -nt option).
275828. There was no check for failure on the call to getsockname() in the daemon
2759 code. This can fail if there is a shortage of resources on the system, with
2760 ENOMEM, for example. A temporary error is now given on failure.
276229. Contrary to the C standard, it seems that in some environments, the
2763 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2764 program. Exim now does this explicitly; it affects the formatting of
2765 timestamps using strftime().
276730. If exiqsumm was given junk data, it threw up some uninitialized variable
2768 complaints. I've now initialized all the variables, to avoid this.
277032. Header lines added by a system filter were not being "seen" during
2771 transport-time rewrites.
277333. The info_callback() function passed to OpenSSL is set up with type void
2774 (*)(SSL *, int, int), as described somewhere. However, when calling the
2775 function (actually a macro) that sets it up, the type void(*)() is
2776 expected. I've put in a cast to prevent warnings from picky compilers.
277834. If a DNS black list lookup found a CNAME record, but there were no A
2779 records associated with the domain it pointed at, Exim crashed.
278135. If a DNS black list lookup returned more than one A record, Exim ignored
2782 all but the first. It now scans all returned addresses if a particular IP
2783 value is being sought. In this situation, the contents of the
2784 $dnslist_value variable are a list of all the addresses, separated by a
2785 comma and a space.
278736. Tightened up the rules for host name lookups using reverse DNS. Exim used
2788 to accept a host name and all its aliases if the forward lookup for any of
2789 them yielded the IP address of the incoming connection. Now it accepts only
2790 those names whose forward lookup yields the correct IP address. Any other
2791 names are discarded. This closes a loophole whereby a rogue DNS
2792 administrator could create reverse DNS records to break through a
2793 wildcarded host restriction in an ACL.
279537. If a user filter or a system filter that ran in a subprocess used any of
2796 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2797 the wrong values were passed to the pipe command ($thisaddress had the
2798 value of $0, $0 had the value of $1, etc). This bug was introduced by
2799 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
280138. Improved the line breaking for long SMTP error messages from ACLs.
2802 Previously, if there was no break point between 40 and 75 characters, Exim
2803 left the rest of the message alone. Two changes have been made: (a) I've
2804 reduced the minimum length to 35 characters; (b) if it can't find a break
2805 point between 35 and 75 characters, it looks ahead and uses the first one
2806 that it finds. This may give the occasional overlong line, but at least the
2807 remaining text gets split now.
280939. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2810 file descriptors might be low, and that setting 1000 would always raise it.
2811 It turns out that in some environments, the limit is already over 1000 and
2812 that lowering it causes trouble. So now Exim takes care not to decrease it.
281440. When delivering a message, the value of $return_path is set to $sender_
2815 address at the start of routing (routers may change the value). By an
2816 oversight, this default was not being set up when an address was tested by
2817 -bt or -bv, which affected the outcome if any router or filter referred to
2818 $return_path.
282041. The idea of the "warn" ACL verb is that it adds a header or writes to the
2821 log only when "message" or "log_message" are set. However, if one of the
2822 conditions was an address verification, or a call to a nested ACL, the
2823 messages generated by the underlying test were being passed through. This
2824 no longer happens. The underlying message is available in $acl_verify_
2825 message for both "message" and "log_message" expansions, so it can be
2826 passed through if needed.
282842. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
2829 new expansion $bh_ to give the encoded byte string without charset
2830 translation. Translation happens only if iconv() is available; HAVE_ICONV
2831 indicates this at build time. HEADERS_CHARSET gives the charset to
2832 translate to; headers_charset can change it in the configuration, and
2833 "headers charset" can change it in an individual filter file.
283543. Now that we have a default RFC 2047 charset (see above), the code in Exim
2836 that creates RFC 2047 encoded "words" labels them as that charset instead
2837 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
2838 expansion operator; (ii) when Exim creates a From: line for a local
2839 message; (iii) when a header line is rewritten to include a "phrase" part.
284144. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
2842 buggy, causing it to skip the first lines of messages whose message ID
2843 ended in 'D'. This would not have bitten before Exim release 4.14, because
2844 message IDs were unlikely to end in 'D' before then. The effect was to have
2845 incorrect size information for certain domains.
284745. #include "config.h" was missing at the start of the crypt16.c module. This
2848 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
2849 noticed.
285146. If there was a timeout during a "random" callout check, Exim treated it as
2852 a failure of the random address, and carried on sending RSET and the real
2853 address. If the delay was just some slowness somewhere, the response to the
2854 original RCPT would be taken as a response to RSET and so on, causing
2855 mayhem of various kinds.
285747. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
2858 when I implemented it. It didn't allow for the fact that some option values
2859 may legitimatetly be negative (e.g. size_addition), and it didn't even do
2860 the right test for positive values.
286248. Domain names in DNS records are case-independent. Exim always looks them up
2863 in lower case. Some resolvers return domain names in exactly the case they
2864 appear in the zone file, that is, they may contain uppercase letters. Not
2865 all resolvers do this - some return always lower case. Exim was treating a
2866 change of case by a resolver as a change of domain, similar to a widening
2867 of a domain abbreviation. This triggered its re-routing code and so it was
2868 trying to route what was effectively the same domain again. This normally
2869 caused routing to fail (because the router wouldn't handle the domain
2870 twice). Now Exim checks for this case specially, and just changes the
2871 casing of the domain that it ultimately uses when it transmits the message
2872 envelope.
287449. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
2875 module.
287750. If a filter generated a file delivery with a non-absolute name (possible if
2878 no home directory exists for the router), the forbid_file option was not
2879 forbidding it.
288151. Added '&' feature to dnslists, to provide bit mask matching in addition to
2882 the existing equality matching.
288452. Exim was using ints instead of ino_t variables in some places where it was
2885 dealing with inode numbers.
288753. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
2888 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
2889 called TMPDIR, and if it finds it is different, it changes its value.
289154. The smtp_printf() function is now made available to local_scan() so
2892 additional output lines can be written before returning. There is also an
2893 smtp_fflush() function to enable the detection of a dropped connection.
2894 The variables smtp_input and smtp_batched_input are exported to
2895 local_scan().
289755. Changed the default runtime configuration: the message "Unknown user"
2898 has been removed from the ACL, and instead placed on the localuser router,
2899 using the cannot_route_message feature. This means that any verification
2900 failures that generate their own messages won't get overridden. Similarly,
2901 the "Unrouteable address" message that was in the ACL for unverifiable
2902 relay addresses has also been removed.
290456. Added hosts_avoid_esmtp to the smtp transport.
290657. The exicyclog script was not checking for the esoteric option
2907 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
2908 will work only if exicyclog is run under the appropriate euid.
291058. Following a discussion on the list, the rules by which Exim recognises line
2911 endings on incoming messages have been changed. The -dropcr and drop_cr
2912 options are now no-ops, retained only for backwards compatibility. The
2913 following line terminators are recognized: LF CRLF CR. However, special
2914 processing applies to CR:
2916 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
2917 nor a local message in the state where . is a terminator.
2919 (ii) If a bare CR is encountered in a header line, an extra space is added
2920 after the line terminator so as not to end the header. The reasoning
2921 behind this is that bare CRs in header lines are most likely either
2922 to be mistakes, or people trying to play silly games.
292459. The size of a message, as listed by "-bp" or in the Exim monitor window,
2925 was being incorrectly given as 18 bytes larger than it should have been.
2926 This is a VOB (very old bug).
292860. This may never have affected anything current, but just in case it has:
2929 When the local host is found other than at the start of a list of hosts,
2930 the local host, those with the same MX, and any that follow, are discarded.
2931 When the list in question was part of a longer list of hosts, the following
2932 hosts (not currently being processed) were also being discarded. This no
2933 longer happens. I'm not sure if this situation could ever has previously
2934 arisen.
293661. Added the "/MX" feature to lists of hosts in the manualroute and query
2937 program routers.
293962. Whenever Exim generates a new message, it now adds an Auto-Submitted:
2940 header. This is something that is recommended in a new Internet Draft, and
2941 is something that is documented as being done by Sendmail. There are two
2942 possible values. For messages generated by the autoreply transport, Exim
2943 adds:
2945 Auto-Submitted: auto-replied
2947 whereas for all other generated messages (e.g. bounces) it adds
2949 Auto-Submitted: auto-generated
295163. The "personal" condition in filters now includes a test for the
2952 Auto-Submitted: header. If it contains the string "auto-" the message it
2953 not considered personal.
295564. Added rcpt_include_affixes as a generic transport option.
295765. Added queue_only_override (default true).
295966. Added the syslog_duplication option.
296167. If what should have been the first header line of a message consisted of
2962 a space followed by a colon, Exim was mis-interpreting it as a header line.
2963 It isn't of course - it is syntactically invalid and should therefore be
2964 treated as the start of the message body. The misbehaviour could have
2965 caused a number of strange effects, including loss of data in subsequent
2966 header lines, and spool format errors.
296868. Formerly, the AUTH parameter on a MAIL command was trusted only if the
2969 client host had authenticated. This control can now be exercised by an ACL
2970 for more flexibility.
297269. By default, callouts do not happen when testing with -bh. There is now a
2973 variant, -bhc, which does actually run the callout code, including
2974 consulting and updating the callout cache.
297670. Added support for saslauthd authentication, courtesy of Alexander
2977 Sabourenkov.
297971. If statvfs() failed on the spool or log directories while checking their
2980 size for availability, Exim confusingly gave the error "space shortage".
2981 Furthermore, in debugging mode it crashed with a floating point exception.
2982 These checks are done if check_{spool,log}_{space,inodes} are set, and when
2983 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
2984 serious problem, Exim now writes to the main and panic logs when this
2985 happens, with details of the failure. It then refuses to accept the
2986 incoming message, giving the message "spool directory problem" or "log
2987 directory problem" with a 421 code for SMTP messages.
298972. When Exim is about to re-exec itself, it ensures that the file descriptors
2990 0, 1, and 2 exist, because some OS complain for execs without them (see
2991 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
2992 descriptors. However, the code omitted to check that the open succeeded,
2993 causing mysterious errors if for some reason the permissions on /dev/null
2994 got screwed. Now Exim writes a message to the main and panic logs, and
2995 bombs out if it can't open /dev/null.
299773. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
2998 interact so that it is all more flexible. It is supposed to remain
2999 backwards compatible. Also added extra_local_interfaces.
300174. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
3002 to bomb out with an assertion failure - to the client this appears as a
3003 connection drop. This problem occurs in the part of the code that was taken
3004 from the Samba project. Fortunately, the assertion is in a very simple
3005 function, so I have fixed this by reproducing the function inline in the
3006 one place where it is called, and arranging for authentication to fail
3007 instead of killing the process with assert().
300975. The SPA client code was not working when the server requested OEM rather
3010 than Unicode encoding.
301276. Added code to make require_files with a specific uid setting more usable in
3013 the case where statting the file as root fails - usually a non-root-mounted
3014 NFS file system. When this happens and the failure is EACCES, Exim now
3015 forks a subprocess and does the per-uid checking as the relevant uid.
301777. Added process_log_path.
301978. If log_file_path was not explicitly set, a setting of check_log_space or
3020 check_log_inodes was ignored.
302279. If a space check for the spool or log partitions fails, the incident is now
3023 logged. Of course, in the latter case the data may get lost...
302580. Added the %p formatting code to string_format() so that it can be used to
3026 print addresses in debug_print(). Adjusted all the address printing in the
3027 debugging in store.c to use %p rather than %d.
302981. There was a concern that a line of code in smtp_in.c could overflow a
3030 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3031 initially expressed, the concern was not well-founded, because trailing
3032 spaces are removed early. However, if the trailing spaces were followed by
3033 a NULL, they did not get removed, so the overflow was possible. Two fixes
3034 were applied:
3036 (a) I re-wrote the offending code in a cleaner fashion.
3037 (b) If an incoming SMTP command contains a NULL character, it is rejected
3038 as invalid.
304082. When Exim changes uid/gid to the Exim user at daemon start time, it now
3041 runs initgroups(), so that if the Exim user is in any additional groups,
3042 they will be used during message reception.
3045Exim version 4.20
3048The change log for 4.20 and earlier releases has been archived.