1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.156 2005/06/15 08:57:10 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
10 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
12 PH/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.
17 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
19 PH/02 Reduce the amount of output that "make" produces by default. Full output
20 can still be requested.
22 PH/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.
27 TF/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.
31 PH/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
36 TF/03 Added the control = fakedefer ACL modifier.
38 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
39 Mark Lowes for thorough testing.
41 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
43 TK/03 Merged latest SRS patch from Miles Wilton.
45 PH/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.
52 PH/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.
59 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
60 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
62 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
63 without a domain if the check to <postmaster@domain> fails.
65 SC/01 Eximstats: added -xls and the ability to specify output files
66 (patch written by Frank Heydlauf).
68 SC/02 Eximstats: use FileHandles for outputing results.
70 SC/03 Eximstats: allow any combination of xls, txt, and html output.
72 SC/04 Eximstats: fixed display of large numbers with -nvr option
74 SC/05 Eximstats: fixed merging of reports with empty tables.
76 SC/06 Eximstats: added the -include_original_destination flag
78 SC/07 Eximstats: removed tabs and trailing whitespace.
80 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
82 TK/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.
86 TK/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.
91 PH/08 The ${def test on a variable was returning false if the variable's
92 value was "0", contrary to what the specification has always said!
93 The result should be true unless the variable is empty.
95 PH/09 The syntax error of a character other than { following "${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.
100 PH/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
104 PH/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.
108 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
109 spamd dying while we are connected to it.
111 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
114 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
115 function for BDB 4.3.
117 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
119 PH/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
127 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
128 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
130 TK/02 Fix ACL "control" statement not being available in MIME ACL.
132 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
134 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
135 to test Sieve filters that use "vacation".
137 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
138 that changes the way the GnuTLS parameters are stored in the cache file.
139 The new format can be generated externally. For backward compatibility,
140 if the data in the cache doesn't make sense, Exim assumes it has read an
141 old-format file, and it generates new data and writes a new file. This
142 means that you can't go back to an older release without removing the
145 PH/03 A redirect router that has both "unseen" and "one_time" set does not
146 work if there are any delivery delays because "one_time" forces the
147 parent to be marked "delivered", so its unseen clone is never tried
148 again. For this reason, Exim now forbids the simultaneous setting of
151 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
152 redirected to themselves ("homonym" addresses). Read the long ChangeLog
153 entry if you want to know the details. The fix, however, neglected to
154 consider the case when local delivery batching is involved. The test for
155 "previously delivered" was not happening when checking to see if an
156 address could be batched with a previous (undelivered) one; under
157 certain circumstances this could lead to multiple deliveries to the same
160 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
161 in its include files, and this causes problems building Exim.
163 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
164 header_syntax) but Exim was just ignoring anything given after a slash.
165 In particular, this caused confusion with an attempt to use "verify =
166 reverse_host_lookup/defer_ok". An error is now given when options are
167 supplied for verify items that do not have them. (Maybe reverse_host_
168 lookup should have a defer_ok option, but that's a different point.)
170 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
171 defined by RFC 821) to 2048, because there were problems with some AUTH
172 commands, and RFC 1869 says the size should be increased for extended
173 SMTP commands that take arguments.
175 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
178 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
179 "unknown" error; now it says that the functionality isn't in the binary.
181 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
182 an address' error message when a string expansion fails (syntax or
183 whatever). Otherwise the password may appear in the log. Following change
184 PH/42 below, there is no longer a chance of it appearing in a bounce
187 PH/11 Installed exipick version 20050225.0 from John Jetmore.
189 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
190 of its addresses was ever tried. (Bugzilla bug #2.)
192 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
193 the result incorrectly in the debug output. (It correctly added a newline
194 to what was transported.)
196 TF/01 Added $received_time.
198 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
199 commented out examples of how to interface to a virus scanner and to
200 SpamAssassin. Also added commented examples of av_scanner and
201 spamd_address settings.
203 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
204 and controls are allowed in which ACLs. There were a couple of minor
205 errors. Some of the entries in the conditions table (which is a table of
206 where they are NOT allowed) were getting very unwieldy; rewrote them as a
207 negation of where the condition IS allowed.
209 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
211 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
212 header file does not have a version number, so I've had to invent a new
213 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
214 API. The code is untested by me (my Linux distribution still has 0.3.2 of
215 radiusclient), but it was contributed by a Radius user.
217 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
218 files or directories, for OpenSSL.
220 PH/19 When an Exim process that is running as root has to create an Exim log
221 file, it does so in a subprocess that runs as exim:exim so as to get the
222 ownership right at creation (otherwise, other Exim processes might see
223 the file with the wrong ownership). There was no test for failure of this
224 fork() call, which would lead to the process getting stuck as it waited
225 for a non-existent subprocess. Forks do occasionally fail when resources
226 run out. I reviewed all the other calls to fork(); they all seem to check
229 PH/20 When checking for unexpected SMTP input at connect time (before writing
230 the banner), Exim was not dealing correctly with a non-positive return
231 from the read() function. If the client had disconnected by this time,
232 the result was a log entry for a synchronization error with an empty
233 string after "input=" when read() returned zero. If read() returned -1
234 (an event I could not check), uninitialized data bytes were printed.
235 There were reports of junk text (parts of files, etc) appearing after
238 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
240 PH/22 Added support for macro redefinition, and (re)definition in between
241 driver and ACL definitions.
243 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
244 forgetting to use the resulting value; it was using the unexpanded value.
246 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
247 hadn't been configured. The fix is from Juergen Kreileder, who
248 understands it better than I do:
250 "Here's what I see happening with three configured cyrus_sasl
251 authenticators configured (plain, login, cram-md5):
253 On startup auth_cyrus_sasl_init() gets called for each of these.
254 This means three calls to sasl_listmech() without a specified mech_list.
255 => SASL tests which mechs of all available mechs actually work
256 => three warnings about OTP not working
257 => the returned list contains: plain, login, cram-md5, digest-md5, ...
259 With the patch, sasl_listmech() also gets called three times. But now
260 SASL's mech_list option is set to the server_mech specified in the the
261 authenticator. Or in other words, the answer from sasl_listmech()
262 gets limited to just the mech you're testing for (which is different
264 => the return list contains just 'plain' or 'login', 'cram-md5' or
265 nothing depending on the value of ob->server_mech.
267 I've just tested the patch: Authentication still works fine,
268 unavailable mechs specified in the exim configuration are still
269 caught, and the auth.log warnings about OTP are gone."
271 PH/25 When debugging is enabled, the contents of the command line are added
272 to the debugging output, even when log_selector=+arguments is not
275 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
276 answer is "GNU", and only if the return is "GNU/something" is the answer
279 PH/27 $acl_verify_message is now set immediately after the failure of a
280 verification in an ACL, and so is available in subsequent modifiers. In
281 particular, the message can be preserved by coding like this:
283 warn !verify = sender
284 set acl_m0 = $acl_verify_message
286 Previously, $acl_verify_message was set only while expanding "message"
287 and "log_message" when a very denied access.
289 PH/28 Modified OS/os.c-Linux with
291 -#ifndef OS_LOAD_AVERAGE
292 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
294 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
295 nomenclature these days.)
297 PH/29 Installed patch from the Sieve maintainer that adds the options
298 sieve_useraddress and sieve_subaddress to the redirect router.
300 PH/30 In these circumstances:
301 . Two addresses routed to the same list of hosts;
302 . First host does not offer TLS;
303 . First host accepts first address;
304 . First host gives temporary error to second address;
305 . Second host offers TLS and a TLS session is established;
306 . Second host accepts second address.
307 Exim incorrectly logged both deliveries with the TLS parameters (cipher
308 and peerdn, if requested) that were in fact used only for the second
311 PH/31 When doing a callout as part of verifying an address, Exim was not paying
312 attention to any local part prefix or suffix that was matched by the
313 router that accepted the address. It now behaves in the same way as it
314 does for delivery: the affixes are removed from the local part unless
315 rcpt_include_affixes is set on the transport.
317 PH/32 Add the sender address, as F=<...>, to the log line when logging a
318 timeout during the DATA phase of an incoming message.
320 PH/33 Sieve envelope tests were broken for match types other than :is. I have
321 applied a patch sanctioned by the Sieve maintainer.
323 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
324 the uid or gid is negative. A case of a negative gid caused this to be
325 noticed. The fix allows for either to be negative.
327 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
328 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
331 PH/36 The change PH/12 above was broken. Fixed it.
333 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
334 the grounds that routing the same address twice would always produce the
335 same answer. This might have been true once, but it is certainly no
336 longer true now. Routing a child address may depend on the previous
337 routing that produced that child. Some complicated redirection strategies
338 went wrong when messages had multiple recipients, and made Exim's
339 behaviour dependent on the order in which the addresses were given.
341 I have moved the duplicate checking until after the routing is complete.
342 Exim scans the addresses that are assigned to local and remote
343 transports, and removes any duplicates. This means that more work will be
344 done, as duplicates will always all be routed, but duplicates are
345 presumably rare, so I don't expect this is of any significance.
347 For deliveries to pipes, files, and autoreplies, the duplicate checking
348 still happens during the routing process, since they are not going to be
351 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
352 It corrects a timeout issue with spamd. This is Ian's comment: "The
353 background is that sometimes spamd either never reads data from a
354 connection it has accepted, or it never writes response data. The exiscan
355 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
356 blindly assumes that writes won't block so it may never time out."
358 PH/39 Allow G after quota size as well as K and M.
360 PH/40 The value set for $authenticated_id in an authenticator may not contain
361 binary zeroes or newlines because the value is written to log lines and
362 to spool files. There was no check on this. Now the value is run through
363 the string_printing() function so that such characters are converted to
364 printable escape sequences.
366 PH/41 $message_linecount is a new variable that contains the total number of
367 lines in the message. Compare $body_linecount, which is the count for the
370 PH/42 Exim no longer gives details of delivery errors for specific addresses in
371 bounce and delay warning messages, except in certain special cases, which
374 (a) An SMTP error message from a remote host;
375 (b) A message specified in a :fail: redirection;
376 (c) A message specified in a "fail" command in a system filter;
377 (d) A message specified in a FAIL return from the queryprogram router;
378 (e) A message specified by the cannot_route_message router option.
380 In these cases only, Exim does include the error details in bounce and
381 warning messages. There are also a few cases where bland messages such
382 as "unrouteable address" or "local delivery error" are given.
384 PH/43 $value is now also set for the "else" part of a ${run expansion.
386 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
387 being worked on, but at least Exim now implements the latest version to
390 PH/45 In a pipe transport, although a timeout while waiting for the pipe
391 process to complete was treated as a delivery failure, a timeout while
392 writing the message to the pipe was logged, but erroneously treated as a
393 successful delivery. Such timeouts include transport filter timeouts. For
394 consistency with the overall process timeout, these timeouts are now
395 treated as errors, giving rise to delivery failures by default. However,
396 there is now a new Boolean option for the pipe transport called
397 timeout_defer, which, if set TRUE, converts the failures into defers for
398 both kinds of timeout. A transport filter timeout is now identified in
401 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
402 systems where "make" and "gmake" are different, calling "gmake" at top
403 level broke things. I've arranged for the value of $(MAKE) to be passed
404 from the Makefile to this script so that it can call the same version of
408 A note about Exim versions 4.44 and 4.50
409 ----------------------------------------
411 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
412 changes of various kinds. As a consequence, a big documentation update was
413 needed. This delayed the release for rather longer than seemed good, especially
414 in the light of a couple of (minor) security issues. Therefore, the changes
415 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
416 release. So 4.44 and 4.50 are in effect two different branches that both start
419 I have left the 4.50 change log unchanged; it contains all the changes since
420 4.43. The change log for 4.44 is below; many of its items are identical to
421 those for 4.50. This seems to be the most sensible way to preserve the
422 historical information.
428 1. Minor wording change to the doc/README.SIEVE file.
430 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
431 computation of the current number of files was incorrect.
433 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
434 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
437 4. Give more explanation in the error message when the command for a transport
438 filter fails to execute.
440 5. There are several places where Exim runs a non-Exim command in a
441 subprocess. The SIGUSR1 signal should be disabled for these processes. This
442 was being done only for the command run by the queryprogram router. It is
443 now done for all such subprocesses. The other cases are: ${run, transport
444 filters, and the commands run by the lmtp and pipe transports.
446 6. Added CONFIGURE_GROUP build-time option.
448 7. Some older OS have a limit of 256 on the maximum number of file
449 descriptors. Exim was using setrlimit() to set 1000 as a large value
450 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
451 systems. I've change it so that if it can't get 1000, it tries for 256.
453 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
454 was an oversight, and furthermore, ever since the addition of extra
455 controls (e.g. 4.43/32), the checks on when to allow different forms of
456 "control" were broken. There should now be diagnostics for all cases when a
457 control that does not make sense is encountered.
459 9. Added the /retain_sender option to "control=submission".
461 10. $recipients is now available in the predata ACL (oversight).
463 11. Tidy the search cache before the fork to do a delivery from a message
464 received from the command line. Otherwise the child will trigger a lookup
465 failure and thereby defer the delivery if it tries to use (for example) a
466 cached ldap connection that the parent has called unbind on.
468 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
469 of $address_data from the recipient verification was clobbered by the
472 13. The value of address_data from a sender verification is now available in
473 $sender_address_data in subsequent conditions in the ACL statement.
475 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
477 15. Added a new option "connect=<time>" to callout options, to set a different
480 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
481 was its contents. (It was OK if the option was not defined at all.)
483 17. A "Completed" log line is now written for messages that are removed from
484 the spool by the -Mrm option.
486 18. New variables $sender_verify_failure and $recipient_verify_failure contain
487 information about exactly what failed.
489 19. Added -dd to debug only the daemon process.
491 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
492 handles timeouts, both on the server side and network timeouts. Renamed the
493 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
495 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
496 It is now set to "smtps".
498 22. $host_address is now set to the target address during the checking of
501 23. When checking ignore_target_hosts for an ipliteral router, no host name was
502 being passed; this would have caused $sender_host_name to have been used if
503 matching the list had actually called for a host name (not very likely,
504 since this list is usually IP addresses). A host name is now passed as
507 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
508 code that specifies a non-restarting handler (typically sigaction() in
509 modern systems) in an attempt to fix a rare and obscure crash bug.
511 25. Narrowed the window for a race in the daemon that could cause it to ignore
512 SIGCHLD signals. This is not a major problem, because they are used only to
513 wake it up if nothing else does.
515 26. A malformed maildirsize file could cause Exim to calculate negative values
516 for the mailbox size or file count. Odd effects could occur as a result.
517 The maildirsize information is now recalculated if the size or filecount
520 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
521 support for a long time. Removed HAVE_SYS_VFS_H.
523 28. Installed the latest version of exipick from John Jetmore.
525 29. In an address list, if the pattern was not a regular expression, an empty
526 subject address (from a bounce message) matched only if the pattern was an
527 empty string. Non-empty patterns were not even tested. This was the wrong
528 because it is perfectly reasonable to use an empty address as part of a
529 database query. An empty address is now tested by patterns that are
530 lookups. However, all the other forms of pattern expect the subject to
531 contain a local part and a domain, and therefore, for them, an empty
532 address still always fails if the pattern is not itself empty.
534 30. Exim went into a mad DNS loop when attempting to do a callout where the
535 host was specified on an smtp transport, and looking it up yielded more
538 31. Re-factored the code for checking spool and log partition space into a
539 function that finds that data and another that does the check. The former
540 is then used to implement four new variables: $spool_space, $log_space,
541 $spool_inodes, and $log_inodes.
543 32. The RFC2047 encoding function was originally intended for short strings
544 such as real names; it was not keeping to the 75-character limit for
545 encoded words that the RFC imposes. It now respects the limit, and
546 generates multiple encoded words if necessary. To be on the safe side, I
547 have increased the buffer size for the ${rfc2047: expansion operator from
550 33. It is now permitted to omit both strings after an "if" condition; if the
551 condition is true, the result is "true". As before, when the second string
552 is omitted, a false condition yields an empty string. This makes it less
553 cumbersome to write custom ACL and router conditions.
555 34. Failure to deliver a bounce message always caused it to be frozen, even if
556 there was an errors_to setting on the router. The errors_to setting is now
559 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
560 canonical form (fully expanded) before being placed in
561 $sender_host_address.
563 36. The table in the code that translates DNS record types into text (T_A to
564 "A" for instance) was missing entries for NS and CNAME. It is just possible
565 that this could have caused confusion if both these types were looked up
566 for the same domain, because the text type is used as part of Exim's
567 per-process caching. But the chance of anyone hitting this buglet seems
570 37. The dnsdb lookup has been extended in a number of ways.
572 (1) There is a new type, "zns", which walks up the domain tree until it
573 finds some nameserver records. It should be used with care.
575 (2) There is a new type, "mxh", which is like "mx" except that it returns
576 just the host names, not the priorities.
578 (3) It is now possible to give a list of domains (or IP addresses) to be
579 looked up. The behaviour when one of the lookups defers can be
580 controlled by a keyword.
582 (4) It is now possible to specify the separator character for use when
583 multiple records are returned.
585 38. The dnslists ACL condition has been extended: it is now possible to supply
586 a list of IP addresses and/or domains to be looked up in a particular DNS
589 39. Added log_selector=+queue_time_overall.
591 40. When running the queue in the test harness, wait just a tad after forking a
592 delivery process, to get repeatability of debugging output.
594 41. Include certificate and key file names in error message when GnuTLS fails
595 to set them up, because the GnuTLS error message doesn't include the name
596 of the failing file when there is a problem reading it.
598 42. Allow both -bf and -bF in the same test run.
600 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
602 44. The "Exiscan patch" is now merged into the mainline Exim source.
604 45. Sometimes the final signoff response after QUIT could fail to get
605 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
606 < 0 before doing a fflush(). This bug looks as though it goes back to the
607 introduction of TLS in release 3.20, but "sometimes" must have been rare
608 because the tests only now provoked it.
610 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
611 (this can affect the format of dates).
613 47. exim_tidydb, when checking for the continued existence of a message for
614 which it has found a message-specific retry record, was not finding
615 messages that were in split spool directories. Consequently, it was
616 deleting retry records that should have stayed in existence.
618 48. Steve fixed some bugs in eximstats.
620 49. The SPA authentication driver was not abandoning authentication and moving
621 on to the next authenticator when an expansion was forced to fail,
622 contradicting the general specification for all authenticators. Instead it
623 was generating a temporary error. It now behaves as specified.
625 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
626 (the order specifies the preference for clients). The order is now AES256,
627 AES128, 3DES, ARCFOUR128.
629 51. Small patch to Sieve code - explicitly set From: when generating an
632 52. Exim crashed if a remote delivery caused a very long error message to be
633 recorded - for instance if somebody sent an entire SpamAssassin report back
634 as a large number of 550 error lines. This bug was coincidentally fixed by
635 increasing the size of one of Exim's internal buffers (big_buffer) that
636 happened as part of the Exiscan merge. However, to be on the safe side, I
637 have made the code more robust (and fixed the comments that describe what
640 53. Now that there can be additional text after "Completed" in log lines (if
641 the queue_time_overall log selector is set), a one-byte patch to exigrep
642 was needed to allow it to recognize "Completed" as not the last thing in
645 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
646 patch that reportedly fixes this has been added. I am not expert enough to
647 create a test for it. This is what the patch creator wrote:
649 "I found a little strange behaviour of ldap code when working with
650 Windows 2003 AD Domain, where users was placed in more than one
651 Organization Units. When I tried to give exim partial DN, the exit code
652 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
653 But simultaneously result of request was absolutely normal ldap result,
654 so I produce this patch..."
656 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
657 REFERENCE, so I have modified the code to exclude the patch when that macro
660 55. Some experimental protocols are using DNS PTR records for new purposes. The
661 keys for these records are domain names, not reversed IP addresses. The
662 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
663 leaves it alone. Component reversal etc. now happens only for IP addresses.
666 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
668 57. Double the size of the debug message buffer (to 2048) so that more of very
669 long debug lines gets shown.
671 58. The exicyclog utility now does better if the number of log files to keep
672 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
674 59. Two changes related to the smtp_active_hostname option:
676 (1) $smtp_active_hostname is now available as a variable.
677 (2) The default for smtp_banner uses $smtp_active_hostname instead
678 of $primary_hostname.
680 60. The host_aton() function is supposed to be passed a string that is known
681 to be a valid IP address. However, in the case of IPv6 addresses, it was
682 not checking this. This is a hostage to fortune. Exim now panics and dies
683 if the condition is not met. A case was found where this could be provoked
684 from a dnsdb PTR lookup with an IPv6 address that had more than 8
685 components; fortuitously, this particular loophole had already been fixed
686 by change 4.50/55 above.
688 If there are any other similar loopholes, the new check in host_aton()
689 itself should stop them being exploited. The report I received stated that
690 data on the command line could provoke the exploit when Exim was running as
691 exim, but did not say which command line option was involved. All I could
692 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
696 61. There was a buffer overflow vulnerability in the SPA authentication code
697 (which came originally from the Samba project). I have added a test to the
698 spa_base64_to_bits() function which I hope fixes it.
701 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
702 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
704 63. The daemon start-up calls getloadavg() while still root for those OS that
705 need the first call to be done as root, but it missed one case: when
706 deliver_queue_load_max is set with deliver_drop_privilege. This is
707 necessary for the benefit of the queue runner, because there is no re-exec
708 when deliver_drop_privilege is set.
710 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
713 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
714 was in use, was not putting the data itself into the right store pool;
715 consequently, it could be overwritten for a subsequent message in the same
716 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
719 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
721 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
722 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
723 the function were treating the return as a boolean value, which happened to
724 work because 0=false and not-0=true, but is not correct code.
726 68. The host_aton() function was not handling scoped IPv6 addresses (those
727 with, for example, "%eth0" on the end) correctly.
729 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
730 negated items (that is, ~something) in unsigned ints. Some compilers
731 apparently mutter when there is no cast.
733 70. If an address verification called from an ACL failed, and did not produce a
734 user-specific message (i.e. there was only a "system" message), nothing was
735 put in $acl_verify_message. In this situation, it now puts the system
738 71. Change 4.23/11 added synchronization checking at the start of an SMTP
739 session; change 4.31/43 added the unwanted input to the log line - except
740 that it did not do this in the start of session case. It now does.
742 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
743 This is wrong and can cause the other end to generate a synchronization
744 error if it is another Exim or anything else that does the synchronization
745 check. A QUIT command is no longer sent after a timeout.
747 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
750 74. The defer_ok option of callout verification was not working if it was used
751 when verifying addresses in header lines, that is, for this case:
753 verify = header_sender/callout=defer_ok
755 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
756 those file descriptors could be used for SMTP connections. If anything
757 wrote to stderr (the example that came up was "warn" in embedded Perl), it
758 could be sent to the SMTP client, causing chaos. The daemon now opens
759 stdin, stdout, and stderr to /dev/null when it puts itself into the
762 76. Arrange for output from Perl's "warn" command to be written to Exim's main
763 log by default. The user can override this with suitable Perl magic.
765 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
766 the log message when discard triggers, was not working for the DATA ACL or
767 for the non-SMTP ACL.
769 78. Error message wording change in sieve.c.
771 79. If smtp_accept_max_per_host was set, the number of connections could be
772 restricted to fewer than expected, because the daemon was trying to set up
773 a new connection before checking whether the processes handling previous
774 connections had finished. The check for completed processes is now done
775 earlier. On busy systems, this bug wouldn't be noticed because something
776 else would have woken the daemon, and it would have reaped the completed
779 80. If a message was submitted locally by a user whose login name contained one
780 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
781 It caused a spool format error. I have fixed the spool reading code. A
782 related problem was that the "from" clause in the Received: line became
783 illegal because of the space(s). It is now covered by ${quote_local_part.
785 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
788 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
790 83. Patch from Sieve maintainer to fix unterminated string problem in
793 84. Some minor changes to the Linux configuration files to help with other
794 OS variants using glibc.
796 85. One more patch for Sieve to update vacation handling to latest spec.
799 ----------------------------------------------------
800 See the note above about the 4.44 and 4.50 releases.
801 ----------------------------------------------------
807 1. Change 4.43/35 introduced a bug that caused file counts to be
808 incorrectly computed when quota_filecount was set in an appendfile
811 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
812 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
815 3. Give more explanation in the error message when the command for a transport
816 filter fails to execute.
818 4. There are several places where Exim runs a non-Exim command in a
819 subprocess. The SIGUSR1 signal should be disabled for these processes. This
820 was being done only for the command run by the queryprogram router. It is
821 now done for all such subprocesses. The other cases are: ${run, transport
822 filters, and the commands run by the lmtp and pipe transports.
824 5. Some older OS have a limit of 256 on the maximum number of file
825 descriptors. Exim was using setrlimit() to set 1000 as a large value
826 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
827 systems. I've change it so that if it can't get 1000, it tries for 256.
829 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
830 was an oversight, and furthermore, ever since the addition of extra
831 controls (e.g. 4.43/32), the checks on when to allow different forms of
832 "control" were broken. There should now be diagnostics for all cases when a
833 control that does not make sense is encountered.
835 7. $recipients is now available in the predata ACL (oversight).
837 8. Tidy the search cache before the fork to do a delivery from a message
838 received from the command line. Otherwise the child will trigger a lookup
839 failure and thereby defer the delivery if it tries to use (for example) a
840 cached ldap connection that the parent has called unbind on.
842 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
843 of $address_data from the recipient verification was clobbered by the
846 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
847 was its contents. (It was OK if the option was not defined at all.)
849 11. A "Completed" log line is now written for messages that are removed from
850 the spool by the -Mrm option.
852 12. $host_address is now set to the target address during the checking of
855 13. When checking ignore_target_hosts for an ipliteral router, no host name was
856 being passed; this would have caused $sender_host_name to have been used if
857 matching the list had actually called for a host name (not very likely,
858 since this list is usually IP addresses). A host name is now passed as
861 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
862 code that specifies a non-restarting handler (typically sigaction() in
863 modern systems) in an attempt to fix a rare and obscure crash bug.
865 15. Narrowed the window for a race in the daemon that could cause it to ignore
866 SIGCHLD signals. This is not a major problem, because they are used only to
867 wake it up if nothing else does.
869 16. A malformed maildirsize file could cause Exim to calculate negative values
870 for the mailbox size or file count. Odd effects could occur as a result.
871 The maildirsize information is now recalculated if the size or filecount
874 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
875 support for a long time. Removed HAVE_SYS_VFS_H.
877 18. Updated exipick to current release from John Jetmore.
879 19. Allow an empty sender to be matched against a lookup in an address list.
880 Previously the only cases considered were a regular expression, or an
883 20. Exim went into a mad DNS lookup loop when doing a callout where the
884 host was specified on the transport, if the DNS lookup yielded more than
887 21. The RFC2047 encoding function was originally intended for short strings
888 such as real names; it was not keeping to the 75-character limit for
889 encoded words that the RFC imposes. It now respects the limit, and
890 generates multiple encoded words if necessary. To be on the safe side, I
891 have increased the buffer size for the ${rfc2047: expansion operator from
894 22. Failure to deliver a bounce message always caused it to be frozen, even if
895 there was an errors_to setting on the router. The errors_to setting is now
898 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
899 canonical form (fully expanded) before being placed in
900 $sender_host_address.
902 24. Updated eximstats to version 1.33
904 25. Include certificate and key file names in error message when GnuTLS fails
905 to set them up, because the GnuTLS error message doesn't include the name
906 of the failing file when there is a problem reading it.
908 26. Expand error message when OpenSSL has problems setting up cert/key files.
911 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
912 (this can affect the format of dates).
914 28. exim_tidydb, when checking for the continued existence of a message for
915 which it has found a message-specific retry record, was not finding
916 messages that were in split spool directories. Consequently, it was
917 deleting retry records that should have stayed in existence.
919 29. eximstats updated to version 1.35
920 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
921 1.35 - bugfix such that pie charts by volume are generated correctly
923 30. The SPA authentication driver was not abandoning authentication and moving
924 on to the next authenticator when an expansion was forced to fail,
925 contradicting the general specification for all authenticators. Instead it
926 was generating a temporary error. It now behaves as specified.
928 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
929 (the order specifies the preference for clients). The order is now AES256,
930 AES128, 3DES, ARCFOUR128.
932 31. Small patch to Sieve code - explicitly set From: when generating an
935 32. Exim crashed if a remote delivery caused a very long error message to be
936 recorded - for instance if somebody sent an entire SpamAssassin report back
937 as a large number of 550 error lines. This bug was coincidentally fixed by
938 increasing the size of one of Exim's internal buffers (big_buffer) that
939 happened as part of the Exiscan merge. However, to be on the safe side, I
940 have made the code more robust (and fixed the comments that describe what
943 33. Some experimental protocols are using DNS PTR records for new purposes. The
944 keys for these records are domain names, not reversed IP addresses. The
945 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
946 leaves it alone. Component reversal etc. now happens only for IP addresses.
949 34. The host_aton() function is supposed to be passed a string that is known
950 to be a valid IP address. However, in the case of IPv6 addresses, it was
951 not checking this. This is a hostage to fortune. Exim now panics and dies
952 if the condition is not met. A case was found where this could be provoked
953 from a dnsdb PTR lookup with an IPv6 address that had more than 8
954 components; fortuitously, this particular loophole had already been fixed
955 by change 4.50/55 or 4.44/33 above.
957 If there are any other similar loopholes, the new check in host_aton()
958 itself should stop them being exploited. The report I received stated that
959 data on the command line could provoke the exploit when Exim was running as
960 exim, but did not say which command line option was involved. All I could
961 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
965 35. There was a buffer overflow vulnerability in the SPA authentication code
966 (which came originally from the Samba project). I have added a test to the
967 spa_base64_to_bits() function which I hope fixes it.
970 36. The daemon start-up calls getloadavg() while still root for those OS that
971 need the first call to be done as root, but it missed one case: when
972 deliver_queue_load_max is set with deliver_drop_privilege. This is
973 necessary for the benefit of the queue runner, because there is no re-exec
974 when deliver_drop_privilege is set.
976 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
977 was in use, was not putting the data itself into the right store pool;
978 consequently, it could be overwritten for a subsequent message in the same
979 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
982 38. Sometimes the final signoff response after QUIT could fail to get
983 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
984 < 0 before doing a fflush(). This bug looks as though it goes back to the
985 introduction of TLS in release 3.20, but "sometimes" must have been rare
986 because the tests only now provoked it.
992 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
993 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
994 Now it returns an integer. A number of calls were still expecting a T/F
995 return. Fortuitously, in all cases, the tests worked in OK situations,
996 which is the norm. However, things would have gone wrong on any write
997 failures on the smtp file descriptor. This function is used when sending
998 messages over SMTP and also when doing verify callouts.
1000 2. When Exim is called to do synchronous delivery of a locally submitted
1001 message (the -odf or -odi options), it no longer closes stderr before doing
1004 3. Implemented the mua_wrapper option.
1006 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
1008 5. Implemented the functions header_remove(), header_testname(),
1009 header_add_at_position(), and receive_remove_recipient(), and exported them
1012 6. If an ACL "warn" statement specified the addition of headers, Exim already
1013 inserted X-ACL-Warn: at the start if there was no header name. However, it
1014 was not making this test for the second and subsequent header lines if
1015 there were newlines in the string. This meant that an invalid header could
1016 be inserted if Exim was badly configured.
1018 7. Allow an ACL "warn" statement to add header lines at the start or after all
1019 the Received: headers, as well as at the end.
1021 8. Added the rcpt_4xx retry error code.
1023 9. Added postmaster_mailfrom=xxx to callout verification option.
1025 10. Added mailfrom=xxxx to the callout verification option, for verify=
1028 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
1029 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
1031 12. Inserted some casts to stop certain compilers warning when using pointer
1032 differences as field lengths or precisions in printf-type calls (mostly
1033 affecting debugging statements).
1035 13. Added optional readline() support for -be (dynamically loaded).
1037 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
1038 same clock tick as a message's arrival, so that its received time was the
1039 same as the "first fail" time on the retry record, and that message
1040 remained on the queue past the ultimate address timeout, every queue runner
1041 would try a delivery (because it was past the ultimate address timeout) but
1042 after another failure, the ultimate address timeout, which should have then
1043 bounced the address, did not kick in. This was a "< instead of <=" error;
1044 in most cases the first failure would have been in the next clock tick
1045 after the received time, and all would be well.
1047 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
1048 being recognized when the domain list was tested by the match_domain
1049 condition in an expansion string.
1051 16. Added the ${str2b64: operator.
1053 17. Exim was always calling setrlimit() to set a large limit for the number of
1054 processes, without checking whether the existing limit was already
1055 adequate. (It did check for the limit on file descriptors.) Furthermore,
1056 errors from getrlimit() and setrlimit() were being ignored. Now they are
1057 logged to the main and panic logs, but Exim does carry on, to try to do its
1058 job under whatever limits there are.
1060 18. Imported PCRE 5.0.
1062 19. Trivial typo in log message " temporarily refused connection" (the leading
1065 20. If the log selector return_path_on_delivery was set and an address was
1066 redirected to /dev/null, the delivery process crashed because it assumed
1067 that a return path would always be set for a "successful" delivery. In this
1068 case, the whole delivery is bypassed as an optimization, and therefore no
1071 21. Internal re-arrangement: the function for sending a challenge and reading
1072 a response while authentication was assuming a zero-terminated challenge
1073 string. It's now changed to take a pointer and a length, to allow for
1074 binary data in such strings.
1076 22. Added the cyrus_sasl authenticator (code supplied by MBM).
1078 23. Exim was not respecting finduser_retries when seeking the login of the
1079 uid under which it was called; it was always trying 10 times. (The default
1080 setting of finduser_retries is zero.) Also, it was sleeping after the final
1081 failure, which is pointless.
1083 24. Implemented tls_on_connect_ports.
1085 25. Implemented acl_smtp_predata.
1087 26. If the domain in control=submission is set empty, Exim assumes that the
1088 authenticated id is a complete email address when it generates From: or
1089 Sender: header lines.
1091 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
1092 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
1093 chown and chgrp in /bin and hostname in /usr/bin.
1095 28. Exim was keeping the "process log" file open after each use, just as it
1096 does for the main log. This opens the possibility of it remaining open for
1097 long periods when the USR1 signal hits a daemon. Occasional processlog
1098 errors were reported, that could have been caused by this. Anyway, it seems
1099 much more sensible not to leave this file open at all, so that is what now
1102 29. The long-running daemon process does not normally write to the log once it
1103 has entered its main loop, and it closes the log before doing so. This is
1104 so that log files can straightforwardly be renamed and moved. However,
1105 there are a couple of unusual error situations where the daemon does write
1106 log entries, and I had neglected to close the log afterwards.
1108 30. The text of an SMTP error response that was received during a remote
1109 delivery was being truncated at 512 bytes. This is too short for some of
1110 the long messages that one sometimes sees. I've increased the limit to
1113 31. It is now possible to make retry rules that apply only when a message has a
1114 specific sender, in particular, an empty sender.
1116 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
1117 it possible to be selective about when SMTP synchronization is enforced.
1119 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
1121 32. Implemented hosts_connection_nolog.
1123 33. Added an ACL for QUIT.
1125 34. Setting "delay_warning=" to disable warnings was not working; it gave a
1128 35. Added mailbox_size and mailbox_filecount to appendfile.
1130 36. Added control = no_multiline_responses to ACLs.
1132 37. There was a bug in the logic of the code that waits for the clock to tick
1133 in the case where the clock went backwards by a substantial amount such
1134 that the microsecond fraction of "now" was more than the microsecond
1135 fraction of "then" (but the whole seconds number was less).
1137 38. Added support for the libradius Radius client library this is found on
1138 FreeBSD (previously only the radiusclient library was supported).
1144 1. When certain lookups returned multiple values in the form name=value, the
1145 quoting of the values was not always being done properly. Specifically:
1146 (a) If the value started with a double quote, but contained no whitespace,
1148 (b) If the value contained whitespace other than a space character (i.e.
1149 tabs or newlines or carriage returns) it was not quoted.
1150 This fix has been applied to the mysql and pgsql lookups by writing a
1151 separate quoting function and calling it from the lookup code. The fix
1152 should probably also be applied to nisplus, ibase and oracle lookups, but
1153 since I cannot test any of those, I have not disturbed their existing code.
1155 2. A hit in the callout cache for a specific address caused a log line with no
1156 reason for rejecting RCPT. Now it says "Previous (cached) callout
1157 verification failure".
1159 3. There was an off-by-one bug in the queryprogram router. An over-long
1160 return line was truncated at 256 instead of 255 characters, thereby
1161 overflowing its buffer with the terminating zero. As well as fixing this, I
1162 have increased the buffer size to 1024 (and made a note to document this).
1164 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
1165 when Exim is waiting for an SMTP response from a remote server, Exim
1166 restarts its select() call on the socket, thereby resetting its timeout.
1167 This is not a problem when such interrupts are rare. Somebody set up a cron
1168 job to run exiwhat every 2 minutes, which is less than the normal select()
1169 timeout (5 or 10 minutes). This meant that the select() timeout never
1170 kicked in because it was always reset. I have fixed this by comparing the
1171 time when an interrupt arrives with the time at the start of the first call
1172 to select(). If more time than the timeout has elapsed, the interrupt is
1173 treated as a timeout.
1175 5. Some internal re-factoring in preparation for the addition of Sieve
1176 extensions (by MH). In particular, the "personal" test is moved to a
1177 separate function, and given an option for scanning Cc: and Bcc: (which is
1178 not set for Exim filters).
1180 6. When Exim created an email address using the login of the caller as the
1181 local part (e.g. when creating a From: or Sender: header line), it was not
1182 quoting the local part when it contained special characters such as @.
1184 7. Installed new OpenBSD configuration files.
1186 8. Reworded some messages for syntax errors in "and" and "or" conditions to
1187 try to make them clearer.
1189 9. Callout options, other than the timeout value, were being ignored when
1190 verifying sender addresses in header lines. For example, when using
1192 verify = header_sender/callout=no_cache
1194 the cache was (incorrectly) being used.
1196 10. Added a missing instance of ${EXE} to the exim_install script; this affects
1197 only the Cygwin environment.
1199 11. When return_path_on_delivery was set as a log selector, if different remote
1200 addresses in the same message used different return paths and parallel
1201 remote delivery occurred, the wrong values would sometimes be logged.
1202 (Whenever a remote delivery process finished, the return path value from
1203 the most recently started remote delivery process was logged.)
1205 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
1206 lines when AUTH and/or TLS are in use. This is the "received protocol"
1207 field. Exim used to use "asmtp" for authenticated SMTP, without any
1208 indication (in the protocol name) for TLS use. Now it follows the RFC and
1209 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
1210 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
1211 names appear in log lines as well as in Received: header lines.
1213 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
1214 extensions, and comparison tests, and to fix some bugs.
1216 14. Changes to the "personal" filter test:
1218 (1) The test was buggy in that it was just doing the equivalent of
1219 "contains" tests on header lines. For example, if a user's address was
1220 anne@some.where, the "personal" test would incorrectly be true for
1222 To: susanne@some.where
1224 This test is now done by extracting each address from the header in turn,
1225 and checking the entire address. Other tests that are part of "personal"
1226 are now done using regular expressions (for example, to check local parts
1227 of addresses in From: header lines).
1229 (2) The list of non-personal local parts in From: addresses has been
1230 extended to include "listserv", "majordomo", "*-request", and "owner-*",
1231 taken from the Sieve specification recommendations.
1233 (3) If the message contains any header line starting with "List-" it is
1234 treated as non-personal.
1236 (4) The test for "circular" in the Subject: header line has been removed
1237 because it now seems ill-conceived.
1239 15. Minor typos in src/EDITME comments corrected.
1241 16. Installed latest exipick from John Jetmore.
1243 17. If headers_add on a router specified a text string that was too long for
1244 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
1245 of string_sprintf() is now avoided.
1247 18. $message_body_size was not set (it was always zero) when running the DATA
1248 ACL and the local_scan() function.
1250 19. For the "mail" command in an Exim filter, no default was being set for
1251 the once_repeat time, causing a random time value to be used if "once" was
1252 specified. (If the value happened to be <= 0, no repeat happened.) The
1253 default is now 0s, meaning "never repeat". The "vacation" command was OK
1254 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
1255 (I found it when inspecting the code).
1257 20. There is now an overall timeout for performing a callout verification. It
1258 defaults to 4 times the callout timeout, which applies to individual SMTP
1259 commands during the callout. The overall timeout applies when there is more
1260 than one host that can be tried. The timeout is checked before trying the
1261 next host. This prevents very long delays if there are a large number of
1262 hosts and all are timing out (e.g. when the network connections are timing
1263 out). The value of the overall timeout can be changed by specifying an
1264 additional sub-option for "callout", called "maxwait". For example:
1266 verify = sender/callout=5s,maxwait=20s
1268 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
1269 to the end before writing, but this should make it even safer).
1271 22. Exim was forgetting that it had advertised PIPELINING for the second and
1272 subsequent messages on an SMTP connection. It was also not resetting its
1273 memory on STARTTLS and an internal HELO.
1275 23. When Exim logs an SMTP synchronization error within a session, it now
1276 records whether PIPELINING has been advertised or not.
1278 24. Added 3 instances of "(long int)" casts to time_t variables that were being
1279 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
1280 rather than long int.
1282 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
1284 26. Added the never_mail option to autoreply.
1290 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
1291 crash if the getsockname() call failed; this can happen if a connection is
1292 closed very soon after it is established. The problem was simply in the
1293 order in which certain operations were done, causing Exim to try to write
1294 to the SMTP stream before it had set up the file descriptor. The bug has
1295 been fixed by making things happen in the correct order.
1301 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
1302 before the connection was closed, thus losing the rejection response.
1304 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
1305 some early Solaris releases, but causes trouble in current releases where
1306 socklen_t is defined.
1308 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
1311 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
1314 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
1315 that releasing the top of it at the end releases what was used for sub-
1316 expansions (unless the block got too big). However, discard this block if
1317 the first thing is a variable or header, so that we can use its block when
1318 it is dynamic (useful for very large $message_headers, for example).
1320 6. Lookups now cache *every* query, not just the most recent. A new, separate
1321 store pool is used for this. It can be recovered when all lookup caches are
1322 flushed. Lookups now release memory at the end of their result strings.
1323 This has involved some general refactoring of the lookup sources.
1325 7. Some code has been added to the store_xxx() functions to reduce the amount
1326 of flapping under certain conditions.
1328 8. log_incoming_interface used to affect only the <= reception log lines. Now
1329 it causes the local interface and port to be added to several more SMTP log
1330 lines, for example "SMTP connection from", and rejection lines.
1332 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
1334 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
1336 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
1337 could be overwritten at the end of the current message (or the start of a
1338 new message if it was set in a HELO ACL). The value is now preserved for
1339 the duration of the SMTP connection.
1341 12. If a transport had a headers_rewrite setting, and a matching header line
1342 contained an unqualified address, that address was qualified, even if it
1343 did not match any rewriting rules. The underlying bug was that the values
1344 of the flags that permit the existence of unqualified sender and recipient
1345 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
1346 non-local messages, and by -bnq for local messages) were not being
1347 preserved with the message after it was received.
1349 13. When Exim was logging an SMTP synchronization error, it could sometimes log
1350 "next input=" as part of the text comprising the host identity instead of
1351 the correct text. The code was using the same buffer for two different
1352 strings. However, depending on which order the printing function evaluated
1353 its arguments, the bug did not always show up. Under Linux, for example, my
1354 test suite worked just fine.
1356 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
1357 doesn't work with some older versions of Perl. It has been changed to "my",
1358 which in any case is probably the better facility to use.
1360 15. A really picky compiler found some instances of statements for creating
1361 error messages that either had too many or two few arguments for the format
1364 16. The size of the buffer for calls to the DNS resolver has been increased
1365 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
1366 for addresses that have a lot of PTR records. This alleviates a problem; it
1367 does not fully solve it.
1369 17. A dnsdb lookup for PTR records that receives more data than will fit in the
1370 buffer now truncates the list and logs the incident, which is the same
1371 action as happens when Exim is looking up a host name and its aliases.
1372 Previously in this situation something unpredictable would happen;
1373 sometimes it was "internal error: store_reset failed".
1375 18. If a server dropped the connection unexpectedly when an Exim client was
1376 using GnuTLS and trying to read a response, the client delivery process
1377 crashed while trying to generate an error log message.
1379 19. If a "warn" verb in an ACL added multiple headers to a message in a single
1380 string, for example:
1382 warn message = H1: something\nH2: something
1384 the text was added as a single header line from Exim's point of view
1385 though it ended up OK in the delivered message. However, searching for the
1386 second and subsequent header lines using $h_h2: did not work. This has been
1387 fixed. Similarly, if a system filter added multiple headers in this way,
1388 the routers could not see them.
1390 20. Expanded the error message when iplsearch is called with an invalid key to
1391 suggest using net-iplsearch in a host list.
1393 21. When running tests using -bh, any delays imposed by "delay" modifiers in
1394 ACLs are no longer actually imposed (and a message to that effect is
1397 22. If a "gecos" field in a passwd entry contained escaped characters, in
1398 particular, if it contained a \" sequence, Exim got it wrong when building
1399 a From: or a Sender: header from that name. A second bug also caused
1400 incorrect handling when an unquoted " was present following a character
1401 that needed quoting.
1403 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
1404 was not being matched caselessly.
1406 24. Arranged for all hyphens in the exim.8 source to be escaped with
1409 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
1410 properly. Recipient callout cache records were still being keyed to include
1411 the sender, even when use_sender was set false. This led to far more
1412 callouts that were necessary. The sender is no longer included in the key
1413 when use_sender is false.
1415 26. Added "control = submission" modifier to ACLs.
1417 27. Added the ${base62d: operator to decode base 62 numbers.
1419 28. dnsdb lookups can now access SRV records.
1421 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
1422 the configuration file.
1424 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
1425 (-v) mode. This makes the output for a verbose queue run more intelligible.
1427 31. Added a use_postmaster feature to recipient callouts.
1429 32. Added the $body_zerocount variable, containing the number of binary zero
1430 bytes in the message body.
1432 33. The time of last modification of the "new" subdirectory is now used as the
1433 "mailbox time last read" when there is a quota error for a maildir
1436 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
1438 35. Added +ignore_unknown as a special item in host lists.
1440 36. Code for decoding IPv6 addresses in host lists is now included, even if
1441 IPv6 support is not being compiled. This fixes a bug in which an IPv6
1442 address was recognized as an IP address, but was then not correctly decoded
1443 into binary, causing unexpected and incorrect effects when compared with
1450 1. Very minor rewording of debugging text in manualroute to say "list of
1451 hosts" instead of "hostlist".
1453 2. If verify=header_syntax was set, and a header line with an unqualified
1454 address (no domain) and a large number of spaces between the end of the
1455 name and the colon was received, the reception process suffered a buffer
1456 overflow, and (when I tested it) crashed. This was caused by some obsolete
1457 code that should have been removed. The fix is to remove it!
1459 3. When running in the test harness, delay a bit after writing a bounce
1460 message to get a bit more predictability in the log output.
1462 4. Added a call to search_tidyup() just before forking a reception process. In
1463 theory, someone could use a lookup in the expansion of smtp_accept_max_
1464 per_host which, without the tidyup, could leave open a database connection.
1466 5. Added the variables $recipient_data and $sender_data which get set from a
1467 lookup success in an ACL "recipients" or "senders" condition, or a router
1468 "senders" option, similar to $domain_data and $local_part_data.
1470 6. Moved the writing of debug_print from before to after the "senders" test
1473 7. Change 4.31/66 (moving the time when the Received: is generated) caused
1474 problems for message scanning, either using a data ACL, or using
1475 local_scan() because the Received: header was not generated till after they
1476 were called (in order to set the time as the time of reception completion).
1477 I have revised the way this works. The header is now generated after the
1478 body is received, but before the ACL or local_scan() are called. After they
1479 are run, the timestamp in the header is updated.
1485 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
1486 before starting a queue runner without re-exec. This happened only when
1487 deliver_drop_privilege was set or when the Exim user was set to root. The
1488 effect of the bug was that timeouts during subsequent deliveries caused
1489 crashes instead of being properly handled. The handler is now left at its
1490 default (and expected) setting.
1492 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
1493 message, again when deliver_drop_privilege is set or Exim is run as root.
1494 The bug described in (1) was not present in this case, but the tidying up
1495 of the other signals was missing. I have made the two cases consistent.
1497 3. The ignore_target_hosts setting on a manualroute router was being ignored
1498 for hosts that were looked up using the /MX notation.
1500 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
1503 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
1504 operated on the sender address. After changing the $sender_address to <>
1505 for the sender address verify, Exim was re-instated it as the original
1506 (before rewriting) address, but remembering that it had rewritten it, so it
1507 wasn't rewriting it again. This bug also had the effect of breaking the
1508 sender address verification caching when the sender address was rewritten.
1510 6. The ignore_target_hosts option was being ignored by the ipliteral router.
1511 This has been changed so that if the ip literal address matches
1512 ignore_target_hosts, the router declines.
1514 7. Added expansion conditions match_domain, match_address, and match_local_
1515 part (NOT match_host).
1517 8. The placeholder for the Received: header didn't have a length field set.
1519 9. Added code to Exim itself and to exim_lock to test for a specific race
1520 condition that could lead to file corruption when using MBX delivery. The
1521 issue is with the lockfile that is created in /tmp. If this file is removed
1522 after a process has opened it but before that process has acquired a lock,
1523 there is the potential for a second process to recreate the file and also
1524 acquire a lock. This could lead to two Exim processes writing to the file
1525 at the same time. The added code performs the same test as UW imapd; it
1526 checks after acquiring the lock that its file descriptor still refers to
1527 the same named file.
1529 10. The buffer for building added header lines was of fixed size, 8192 bytes.
1530 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
1533 11. Added the smtp_active_hostname option. If used, this will typically be made
1534 to depend on the incoming interface address. Because $interface_address is
1535 not set up until the daemon has forked a reception process, error responses
1536 that can happen earlier (such as "too many connections") no longer contain
1539 12. If an expansion in a condition on a "warn" statement fails because a lookup
1540 defers, the "warn" statement is abandoned, and the next ACL statement is
1541 processed. Previously this caused the whole ACL to be aborted.
1543 13. Added the iplsearch lookup type.
1545 14. Added ident_timeout as a log selector.
1547 15. Added tls_certificate_verified as a log selector.
1549 16. Added a global option tls_require_ciphers (compare the smtp transport
1550 option of the same name). This controls incoming TLS connections.
1552 17. I finally figured out how to make tls_require_ciphers do a similar thing
1553 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
1554 before starting the TLS session.
1556 18. Tabs are now shown as \t in -bP output.
1558 19. If the log selector return_path_on_delivery was set, Exim crashed when
1559 bouncing a message because it had too many Received: header lines.
1561 20. If two routers both had headers_remove settings, and the first one included
1562 a superfluous trailing colon, the final name in the first list and the
1563 first name in the second list were incorrectly joined into one item (with a
1564 colon in the middle).
1570 1. Added -C and -D options to the exinext utility, mainly to make it easier
1571 to include in the automated testing, but these could be helpful when
1572 multiple configurations are in use.
1574 2. The exinext utility was not formatting the output nicely when there was
1575 an alternate port involved in the retry record key, nor when there was a
1576 message id as well (for retries that were specific to a specific message
1577 and a specific host). It was also confused by IPv6 addresses, because of
1578 the additional colons they contain. I have fixed the IPv4 problem, and
1579 patched it up to do a reasonable job for IPv6.
1581 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
1582 delivery, the log line now contains "pipelined" if PIPELINING was used.
1584 4. An SMTP transport process used to panic and die if the bind() call to set
1585 an explicit outgoing interface failed. This has been changed; it is now
1586 treated in the same way as a connect() failure.
1588 5. A reference to $sender_host_name in the part of a conditional expansion
1589 that was being skipped was still causing a DNS lookup. This no longer
1592 6. The def: expansion condition was not recognizing references to header lines
1593 that used bh_ and bheader_.
1595 7. Added the _cache feature to named lists.
1597 8. The code for checking quota_filecount in the appendfile transport was
1598 allowing one more file than it should have been.
1600 9. For compatibility with Sendmail, the command line option
1608 and sets the incoming protocol and host name (for trusted callers). The
1609 host name and its colon can be omitted when only the protocol is to be set.
1610 Note the Exim already has two private options, -pd and -ps, that refer to
1611 embedded Perl. It is therefore impossible to set a protocol value of "d" or
1612 "s", but I don't think that's a major issue.
1614 10. A number of refactoring changes to the code, none of which should affect
1617 (a) The number of logging options was getting close to filling up the
1618 32-bit word that was used as a bit map. I have split them into two classes:
1619 those that are passed in the argument to log_write(), and those that are
1620 only ever tested independently outside of that function. These are now in
1621 separate 32-bit words, so there is plenty of room for expansion again.
1622 There is no change in the user interface or the logging behaviour.
1624 (b) When building, for example, log lines, the code previously used a
1625 macro that called string_cat() twice, in order to add two strings. This is
1626 not really sufficiently general. Furthermore, there was one instance where
1627 it was actually wrong because one of the argument was used twice, and in
1628 one call a function was used. (As it happened, calling the function twice
1629 did not affect the overall behaviour.) The macro has been replaced by a
1630 function that can join an arbitrary number of extra strings onto a growing
1633 (c) The code for expansion conditions now uses a table and a binary chop
1634 instead of a serial search (which was left over from when there were very
1635 few conditions). Also, it now recognizes conditions like "pam" even when
1636 the relevant support is not compiled in: a suitably worded error message is
1637 given if an attempt is made to use such a condition.
1639 11. Added ${time_interval:xxxxx}.
1641 12. A bug was causing one of the ddress fields not to be passed back correctly
1642 from remote delivery subprocesses. The field in question was not being
1643 subsequently used, so this caused to problems in practice.
1645 13. Added new log selectors queue_time and deliver_time.
1647 14. Might have fixed a bug in maildirsizefile handling that threw up
1648 "unexpected character" debug warnings, and recalculated the data
1649 unnecessarily. In any case, I expanded the warning message to give more
1652 15. Added the message "Restricted characters in address" to the statements in
1653 the default ACL that block characters like @ and % in local parts.
1655 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
1656 Three changes have been made:
1658 (a) There was a serious bug; a negative response to MAIL caused the whole
1659 recipient domain to be cached as invalid, thereby blocking all messages
1660 to all local parts at the same domain, from all senders. This bug has
1661 been fixed. The domain is no longer cached after a negative response to
1662 MAIL if the sender used is not empty.
1664 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
1667 (c) A new callout option, "use_sender" has been added for people who want
1668 the modified behaviour.
1674 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
1677 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
1678 indeed breaks things for older releases.
1680 3. Added additional logging to the case where there is a problem reading data
1681 from a filter that is running in a subprocess using a pipe, in order to
1682 try to track down a specific problem.
1684 4. Testing facility fudge: when running in the test harness and attempting
1685 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
1686 getting "No route to host". Convert this to a timeout.
1688 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
1691 6. Some OS don't have socklen_t but use size_t instead. This affects the
1692 fifth argument of getsockopt() amongst other things. This is now
1693 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
1694 can be set for individual OS. I have set it for SunOS5, OSF1, and
1695 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
1696 some earlier ones do not.
1698 7. Change 4.30/15 was not doing the test caselessly.
1700 8. The standard form for an IPv6 address literal was being rejected by address
1701 parsing in, for example, MAIL and RCPT commands. An example of this kind of
1702 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1703 this, as well as the form without the "IPv6" on the front (but only when
1704 address literals are enabled, of course).
1706 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
1708 10. Exim crashed if a message with an empty sender address specified by -f
1709 encountered a router with an errors_to setting. This could be provoked only
1710 by a command such as
1714 where an empty string was supplied; "<>" did not hit this bug.
1716 11. Installed PCRE release 4.5.
1718 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
1719 remained set. It is now erased.
1721 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
1722 times from message ids (which are base 36 rather than the normal 62).
1724 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
1725 were being counted as actual protocol errors, and logged if the log
1726 selector +smtp_protocol_error was set. One cannot be perfect in this test,
1727 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
1728 and DATA following a set of rejected RCPTs do not count as protocol errors.
1729 In other words, Exim assumes they were pipelined, though this may not
1730 actually be the case. Of course, in all cases the client gets an
1731 appropriate error code.
1733 15. If a lookup fails in an ACL condition, a message about the failure may
1734 be available; it is used if testing the ACL cannot continue, because most
1735 such messages specify what the cause of the deferral is. However, some
1736 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
1737 that caused an old message to be retained and used if a later statement
1738 caused a defer, replacing the real cause of the deferral.
1740 16. If an IP address had so many PTR records that the DNS lookup buffer
1741 was not large enough to hold them, Exim could crash while trying to process
1742 the truncated data. It now detects and logs this case.
1744 17. Further to 4.21/58, another change has been made: if (and only if) the
1745 first line of a message (the first header line) ends with CRLF, a bare LF
1746 in a subsequent header line has a space inserted after it, so as not to
1747 terminate the header.
1749 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
1750 unnecessarily, used atoi() instead of strtol(), and didn't check the
1751 termination when getting file sizes from file names by regex.
1753 19. Completely re-implemented the support for maildirsize files, in the light
1754 of a number of problems with the previous contributed implementation
1755 (4.30/29). In particular:
1757 . If the quota is zero, the maildirsize file is maintained, but no quota is
1760 . If the maildir directory does not exist, it is created before any attempt
1761 to write a maildirsize file.
1763 . The quota value in the file is just a cache; if the quota is changed in
1764 the transport, the new value overrides.
1766 . A regular expression is available for excluding directories from the
1769 20. The autoreply transport checks the characters in options that define the
1770 message's headers; it allows continued headers, but it was checking with
1771 isspace() after an embedded newline instead of explicitly looking for a
1774 21. If all the "regular" hosts to which an address was routed had passed their
1775 expiry times, and had not reached their retry times, the address was
1776 bounced, even if fallback hosts were defined. Now Exim should go on to try
1779 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
1780 equivalent code in the SMTP transport. Some hosts send humungous responses
1781 to HELO/EHLO, more than 1024 it seems.
1783 23. Refactoring: code in filter.c used (void *) for "any old type" but this
1784 gives compiler warnings in some environments. I've now done it "properly",
1787 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
1788 (because of problems with the built-in one) was declared to return uschar *
1789 instead of char *, causing compiler failure.
1791 25. Fixed a file descriptor leak when processing alias/forward files.
1793 26. Fixed a minor format string issue in dbfn.c.
1795 27. Typo in exim.c: ("dmbnz" for "dbmnz").
1797 28. If a filter file refered to $h_xxx or $message_headers, and the headers
1798 contained RFC 2047 "words", Exim's memory could, under certain conditions,
1801 29. When a sender address is verified, it is cached, to save repeating the test
1802 when there is more than one recipient in a message. However, when the
1803 verification involves a callout, it is possible for different callout
1804 options to be set for different recipients. It is too complicated to keep
1805 track of this in the cache, so now Exim always runs a verification when a
1806 callout is required, relying on the callout cache for the optimization.
1807 The overhead is duplication of the address routing, but this should not be
1810 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
1811 to be verified with callout=postmaster, and the main callout worked but the
1812 postmaster check failed, the verification correctly failed. However, if a
1813 subsequent RCPT command asked for sender verification *without* the
1814 postmaster check, incorrect caching caused this verification also to fail,
1817 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
1818 it was not caching the DNS options (qualify_single, search_parents) that
1819 were used when the lookup failed. A subsequent lookup with different
1820 options therefore always gave the same answer, though there were cases
1821 where it should not have. (Example: a "domains = !$mx_any" option on a
1822 dnslookup router: the "domains" option is always processed without any
1823 widening, but the router might have qualify_single set.) Now Exim uses the
1824 cached value only when the same options are set.
1826 32. Added John Jetmore's "exipick" utility to the distribution.
1828 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
1829 than a timeout (e.g. a certificate is required, and is not provided), an
1830 Exim server now closes the connection immediately. Previously it waited for
1831 the client to close - but if the client is SSL, it seems that they each
1832 wait for each other, leading to a delay before one of them times out.
1834 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
1835 maintained 0.8.x compatibility because I don't think many are using it, and
1836 it is clearly obsolete.
1838 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
1841 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
1842 client certificate was expired. A simple patch fixes this, though I don't
1843 understand the full logic of why the verify callback is called multiple
1846 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
1847 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
1848 which causes problems with some clients (such as the Certicom SSL Plus
1849 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
1850 disables the coutermeasure allowing Eudora to connect."
1852 38. Exim was not checking that a write() to a log file succeeded. This could
1853 lead to Bad Things if a log got too big, in particular if it hit a file
1854 size limit. Exim now panics and dies if it cannot write to a log file, just
1855 as it does if it cannot open a log file.
1857 39. Modified OS/Makefile-Linux so that it now contains
1859 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
1861 The two -D definitions ensure that Exim is compiled with large file
1862 support, which makes it possible to handle log files that are bigger than
1865 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
1866 instance) a domain was checked against a named list that involved a lookup,
1867 causing $domain_data to be set, then another domain was checked against the
1868 same list, then the first domain was re-checked, the value of $domain_data
1869 after the final check could be wrong. In particular, if the second check
1870 failed, it could be set empty. This bug probably also applied to
1873 41. The strip_trailing_dot option was not being applied to the address given
1874 with the -f command-line option.
1876 42. The code for reading a message's header from the spool was incrementing
1877 $received_count, but never initializing it. This meant that the value was
1878 incorrect (doubled) while delivering a message in the same process in which
1879 it was received. In the most common configuration of Exim, this never
1880 happens - a fresh exec is done - but it can happen when
1881 deliver_drop_privilege is set.
1883 43. When Exim logs an SMTP synchronization error - client data sent too soon -
1884 it now includes up to 150 characters of the unexpected data in the log
1887 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
1888 and building data strings. The size of both of these buffers was 10 000
1889 bytes - far larger than anybody would *ever* want, thought I. Needless to
1890 say, somebody hit the limit. I have increased the maximum line length to
1891 20 000 and the maximum data length of concatenated lines to 100 000. I have
1892 also fixed two bugs, because there was no checking on these buffers. Tsk,
1893 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
1894 buffer is too small.
1896 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
1897 lsearch lookups. Now it does.
1899 46. When parsing a route_list item in a manualroute router, a fixed-length
1900 buffer was used for the list of hosts. I made this 1024 bytes long,
1901 thinking that nobody would ever have a list of hosts that long. Wrong.
1902 Somebody had a whole pile of complicated expansion conditions, and the
1903 string was silently truncated, leading to an expansion error. It turns out
1904 that it is easier to change to an unlimited length (owing to other changes
1905 that have happened since this code was originally written) than to build
1906 structure for giving a limitation error. The length of the item that
1907 expands into the list of hosts is now unlimited.
1909 47. The lsearch lookup could not handle data where the length of text line was
1910 more than 4095 characters. Such lines were truncated, leading to shortened
1911 data being returned. It should now handle lines of any length.
1913 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
1914 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
1917 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
1918 replacing strings such as BIN_DIRECTORY in a source file: the replacement
1919 no longer happens in comment lines. A list of replacements is now placed
1920 at the head of all of the source files, except those whose only change is
1921 to replace PERL_COMMAND in the very first #! line.
1923 50. Replaced the slow insertion sort in queue.c, for sorting the list of
1924 messages on the queue, with a bottom-up merge sort, using code contributed
1925 by Michael Haardt. This should make operations like -bp somewhat faster on
1926 large queues. It won't affect queue runners, except when queue_run_in_order
1929 51. Installed eximstats 1.31 in the distribution.
1931 52. Added support for SRV lookups to the dnslookup router.
1933 53. If an ACL referred to $message_body or $message_body_end, the value was not
1934 reset for any messages that followed in the same SMTP session.
1936 54. The store-handling optimization for building very long strings was not
1937 differentiating between the different store pools. I don't think this
1938 actually made any difference in practice, but I've tidied it.
1940 55. While running the routers to verify a sender address, $sender_address
1941 was still set to the sender address. This is wrong, because when routing to
1942 send a bounce to the sender, it would be empty. Therefore, I have changed
1943 it so that, while verifying a sender address, $sender_address is set to <>.
1944 (There is no change to what happens when verifying a recipient address.)
1946 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
1947 target A or AAAA records (if not already returned) without resetting the
1948 qualify_single or search_parents options of the DNS resolver. These are
1949 inappropriate in this case because the targets of MX and SRV records must
1950 be FQDNs. A broken DNS record could cause trouble if it happened to have a
1951 target that, when qualified, matched something in the local domain. These
1952 two options are now turned off when doing these lookups.
1954 57. It seems that at least some releases of Reiserfs (which does not have the
1955 concept of a fixed number of inodes) returns zero and not -1 for the
1956 number of available inodes. This interacted badly with check_spool_inodes,
1957 which assumed that -1 was the "no such thing" setting. What I have done is
1958 to check that the total number of inodes is greater than zero before doing
1959 the test of how many are available.
1961 58. When a "warn" ACL statement has a log_message modifier, the message is
1962 remembered, and not repeated. This is to avoid a lot of repetition when a
1963 message has many recipients that cause the same warning to be written.
1964 Howewer, Exim was preserving the list of already written lines for an
1965 entire SMTP session, which doesn't seem right. The memory is now reset if a
1966 new message is started.
1968 59. The "rewrite" debugging flag was not showing the result of rewriting in the
1969 debugging output unless log_rewrite was also set.
1971 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
1972 of (int)(handle) when we know that handle contains (void *)(-1).
1974 61. The Exim daemon panic-logs an error return when it closes the incoming
1975 connection. However "connection reset by peer" seems to be common, and
1976 isn't really an error worthy of noting specially, so that particular error
1979 62. When Exim is trying to find all the local interfaces, it used to panic and
1980 die if the ioctl to get the interface flags failed. However, it seems that
1981 on at least one OS (Solaris 9) it is possible to have an interface that is
1982 included in the list of interfaces, but for which you get a failure error
1983 for this call. This happens when the interface is not "plumbed" into a
1984 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
1985 failure of the "get flags" call assumes that the interface is down.
1987 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
1988 makes life easier for people who are doing arithmetic on fields extracted
1989 from dates, where you often get leading zeros that should not be
1990 interpreted as octal.
1992 64. Added qualify_domain to the redirect router, to override the global
1995 65. If a pathologically long header line contained very many addresses (the
1996 report of this problem mentioned 10 000) and each of them was rewritten,
1997 Exim could use up a very large amount of memory. (It kept on making new
1998 copies of the header line as it rewrote, and never released the old ones.)
1999 At the expense of a bit more processing, the header rewriting function has
2000 been changed so that it no longer eats memory in this way.
2002 66. The generation of the Received: header has been moved from the time that a
2003 message starts to be received, to the time that it finishes. The timestamp
2004 in the Received: header should now be very close to that of the <= log
2005 line. There are two side-effects of this change:
2007 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
2008 logged header lines no longer include the local Received: line, because
2009 it has not yet been created. The same applies to a copy of the message
2010 that is returned to a non-SMTP sender when a message is rejected.
2012 (b) When a filter file is tested using -bf, no additional Received: header
2013 is added to the test message. After some thought, I decided that this
2016 This change does not affect the value of $received_for. It is still set
2017 after address rewriting, but before local_scan() is called.
2019 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
2021 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
2022 gave an unhelpful panic error message, and a defer error. I have managed to
2023 change this behaviour so that it now rejects any supplied certificate,
2024 which seems right, as the list of acceptable certificates is empty.
2026 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
2027 gave an unhelpful defer error. I have not managed to make this reject any
2028 supplied certificates, but the error message it gives is "no certificate
2029 supplied", which is not helpful.
2031 70. exigrep's output now also includes lines that are not associated with any
2032 message, but which match the given pattern. Implemented by a patch from
2033 Martin Sluka, which also tidied up the Perl a bit.
2035 71. Recipient callout verification, like sender verification, was using <> in
2036 the MAIL FROM command. This isn't really the right thing, since the actual
2037 sender may affect whether the remote host accepts the recipient or not. I
2038 have changed it to use the actual sender in the callout; this means that
2039 the cache record is now keyed on a recipient/sender pair, not just the
2040 recipient address. There doesn't seem to be a real danger of callout loops,
2041 since a callout by the remote host to check the sender would use <>.
2042 [SEE ABOVE: changed after hitting problems.]
2044 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
2045 temporary errors. However, in the case of such a code being given after
2046 the end of a data transmission (i.e. after ".") Exim was failing to write
2047 a retry record for the message. (Yes, there was some broken host that was
2048 actually sending 8xx at this point.)
2050 73. An unknown lookup type in a host list could cause Exim to panic-die when
2051 the list was checked. (An example that provoked this was putting <; in the
2052 middle of a list instead of at the start.) If this happened during a DATA
2053 ACL check, a -D file could be left lying around. This kind of configuration
2054 error no longer causes Exim to die; instead it causes a defer errror. The
2055 incident is still logged to the main and panic logs.
2057 74. Buglet left over from Exim 3 conversion. The message "too many messages
2058 in one connection" was written to the rejectlog but not the mainlog, except
2059 when address rewriting (yes!) was being logged.
2061 75. Added write_rejectlog option.
2063 76. When a system filter was run not as root (that is, when system_filter_user
2064 was set), the values of the $n variables were not being returned to the
2065 main process; thus, they were not subsequently available in the $sn
2068 77. Added +return_path_on_delivery log selector.
2070 78. A connection timeout was being treated differently from recipients deferred
2071 when testing hosts_max_try with a message that was older than the host's
2072 retry timeout. (The host should not be counted, thus allowing all hosts to
2073 be tried at least once before bouncing.) This may have been the cause of an
2074 occasionally reported bug whereby a message would remain on the queue
2075 longer than the retry timeout, but would be bounced if a delivery was
2076 forced. I say "may" because I never totally pinned down the problem;
2077 setting up timeout/retry tests is difficult. See also the next item.
2079 79. The ultimate address timeout was not being applied to errors that involved
2080 a combination of host plus message (for example, a timeout on a MAIL
2081 command). When an address resolved to a number of possible hosts, and they
2082 were not all tried for each delivery (e.g. because of hosts_max_try), a
2083 message could remain on the queue longer than the retry timeout.
2085 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
2088 81. Fixed an obscure SMTP outgoing bug which required at least the following
2089 conditions: (a) there was another message waiting for the same server;
2090 (b) the server returned 5xx to all RCPT commands in the first message so
2091 that the message was not completed; (c) the server dropped the connection
2092 or gave a negative response to the RSET that Exim sends to abort the
2093 transaction. The observed case was a dropped connection after DATA that had
2094 been sent in pipelining mode. That is, the server had advertised PIPELINING
2095 but was not implementing it correctly. The effect of the bug was incorrect
2096 behaviour, such as trying another host, and this could lead to a crash.
2102 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
2103 and daemon.c were passed as pointers to ints; they should have been
2104 pointers to socklen_t variables (which are typically unsigned ints).
2106 2. Some signed/unsigned type warnings in the os.c file for Linux have been
2109 3. Fixed a really odd bug that affected only the testing scheme; patching a
2110 certain fixed string in the binary changed the value of another string that
2111 happened to be identical to the end of the original first string.
2113 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
2114 name", it returns that address as the IP address. On some operating
2115 systems (e.g. Solaris), it also passes back the IP address string as the
2116 "host name". However, on others (e.g. Linux), it passes back an empty
2117 string. Exim wasn't checking for this, and was changing the host name to an
2118 empty string, assuming it had been canonicized.
2120 5. Although rare, it is permitted to have more than one PTR record for a given
2121 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
2122 all the names associated with an address, because they do in Solaris.
2123 However, it seems that they do not in Linux for data that comes from the
2124 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
2125 I found this out when I moved to a new Linux workstation and tried to run
2126 the Exim test suite.
2128 To get round this problem I have changed the code so that it now does its
2129 own call to the DNS to look up PTR records when searching for a host name.
2130 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
2131 addresses that are only in /etc/hosts are still found.
2133 This behaviour is, however, controlled by an option called host_lookup_
2134 order, which defaults to "bydns:byaddr". If people want to use the other
2135 order, or indeed, just use one or the other means of lookup, they can
2136 specify it in this variable.
2138 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
2139 some operating systems, this comes back from gethostbyaddr() as an empty
2140 string, and this is what Exim used to test for. However, it seems that in
2141 other systems, "." is yielded. Exim now tests for this case too.
2143 7. The values of check_spool_space and check_log_space are now held internally
2144 as a number of kilobytes instead of an absolute number of bytes. If a
2145 numbers is specified without 'K' or 'M', it is rounded up to the nearest
2146 kilobyte. This means that much larger values can be stored.
2148 8. Exim monitor: an attempt to get the action menu when not actually pointing
2149 at a message produces an empty menu entitled "No message selected". This
2150 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
2151 no entries in it ("Shell widget menu has zero width and/or height"). So I
2152 have added a single, blank menu entry in this case.
2154 9. Added ${quote_local_part.
2156 10. MIME decoding is now applied to the contents of Subject: header lines when
2159 11. Now that a reference to $sender_host_address automatically causes a reverse
2160 lookup to occur if necessary (4.13/18), there is no need to arrange for a
2161 host lookup before query-style lookups in lists that might use this
2162 variable. This has therefore been abolished, and the "net-" prefix is no
2163 longer necessary for query-style lookups.
2165 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
2166 have been a typo for LFLAGS, so it has been changed.
2168 13. The install script calls Exim with "-C /dev/null" in order to find the
2169 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
2170 to be output. Howeve, since Exim outputs its version number before the
2171 error, it didn't break the script. It just looked ugly. I fixed this by
2172 always allowing "-C /dev/null" if the caller is root.
2174 14. Ignore overlarge ACL variable number when reading spool file - insurance
2175 against a later release with more variables having written the file.
2177 15. The standard form for an IPv6 address literal was being rejected by EHLO.
2178 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2179 this, as well as the form without the "IPv6" on the front.
2181 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
2182 OS/Makefile-Darwin file.
2184 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
2185 only to LDAP libraries that do not have LDAP_OPT_DEREF.
2187 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
2188 variable. However, some OS use ints for inodes. I've added cast to long int
2189 to get rid of the compiler warning.
2191 19. I had forgotten to lock out "/../" in configuration file names when
2192 ALT_CONFIG_PREFIX was set.
2194 20. Routers used for verification do not need to specify transports. However,
2195 if such a router generated a host list, and callout was configured, Exim
2196 crashed, because it could not find a port number from the (non-existent)
2197 transport. It now assumes port 25 in this circumstance.
2199 21. Added the -t option to exigrep.
2201 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
2202 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
2203 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
2204 them is set, LOOKUP_LSEARCH is forced.
2206 23. "exim -bV" now outputs a list of lookups that are included in the binary.
2208 24. Added sender and host information to the "rejected by local_scan()" log
2209 line; previously there was no indication of these.
2211 25. Added .include_if_exists.
2213 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
2214 Linux. It turns out that not all file systems support this. Apparently some
2215 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
2216 do it.) To cope with this, the error EINVAL, which means that sync-ing is
2217 not supported on the file descriptor, is now ignored when Exim is trying to
2218 sync a directory. This applies only to Linux.
2220 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
2222 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
2223 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
2226 29. Added support for maildirsize files from supplied patch (modified a bit).
2228 30. The use of :fail: followed by an empty string could lead Exim to respond to
2229 sender verification failures with (e.g.):
2231 550 Verification failed for <xxx>
2232 550 Sender verify failed
2234 where the first response line was missing the '-' that indicates it is not
2235 the final line of the response.
2237 31. The loop for finding the name of the user that called Exim had a hardwired
2238 limit of 10; it now uses the value of finduser_retries, which is used for
2239 all other user lookups.
2241 32. Added $received_count variable, available in data and not_smtp ACLs, and at
2244 33. Exim was neglecting to zero errno before one call of strtol() when
2245 expanding a string and expecting an integer value. On some systems this
2246 resulted in spurious "integer overflow" errors. Also, it was casting the
2247 result into an int without checking.
2249 34. Testing for a connection timeout using "timeout_connect" in the retry rules
2250 did not work. The code looks as if it has *never* worked, though it appears
2251 to have been documented since at least releast 1.62. I have made it work.
2253 35. The "timeout_DNS" error in retry rules, also documented since at least
2254 1.62, also never worked. As it isn't clear exactly what this means, and
2255 clearly it isn't a major issue, I have abolished the feature by treating it
2256 as "timeout", and writing a warning to the main and panic logs.
2258 36. The display of retry rules for -brt wasn't always showing the error code
2261 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
2262 timeout_connect_A, timeout_connect_MX.
2264 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
2265 to the empty sender.
2267 39. The daemon was not analysing the content of -oX till after it had closed
2268 stderr and disconnected from the controlling terminal. This meant that any
2269 syntax errors were only noted on the panic log, and the return code from
2270 the command was 0. By re-arranging the code a little, I've made the
2271 decoding happen first, so such errors now appear on stderr, and the return
2272 code is 1. However, the actual setting up of the sockets still happens in
2273 the disconnected process, so errors there are still only recorded on the
2276 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
2277 connections (as happens on some IP stacks) was logged at start up time as
2278 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
2279 it from "IPv6 and IPv4", which means that two separate sockets are being
2282 41. The debug output for gethostbyname2() or getipnodebyname() failures now
2283 says whether AF_INET or AF_INET6 was passed as an argument.
2285 42. Exiwhat output was messed up when time zones were included in log
2288 43. Exiwhat now gives more information about the daemon's listening ports,
2289 and whether -tls-on-connect was used.
2291 44. The "port" option of the smtp transport is now expanded.
2293 45. A "message" modifier in a "warn" statement in a non-message ACL was being
2294 silently ignored. Now an error message is written to the main and panic
2297 46. There's a new ACL modifier called "logwrite" which writes to a log file
2298 as soon as it is encountered.
2300 47. Added $local_user_uid and $local_user_gid at routing time.
2302 48. Exim crashed when trying to verify a sender address that was being
2305 49. Exim was recognizing only a space character after ".include". It now also
2306 recognizes a tab character.
2308 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
2309 extracting the relevant information from the specification. The man page no
2310 longer contains scrambled data for the -d option, and I've added a section
2311 at the front about calling Exim under different names.
2313 51. Added "extra_headers" argument to the "mail" command in filter files.
2315 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
2318 53. Installed eximstats 1.29.
2320 54. Added transport_filter_timeout as a generic transport option.
2322 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
2323 Cc: header lines. This was required by RFC 822, but it not required by RFC
2326 56. Exim used to add From:, Date:, and Message-Id: header lines to any
2327 incoming messages that did not have them. Now it does so only if the
2328 message originates locally, that is, if there is no associated remote host
2329 address. When Resent- header lines are present, this applies to the Resent-
2330 lines rather than the non-Resent- lines.
2332 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
2333 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
2335 58. Messages for configuration errors now include the name of the main
2336 configuration file - useful now that there may be more than one file in a
2337 list (.included file names were always shown).
2339 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
2340 for those rare installations that do not start the daemon as root or run it
2341 setuid root. I've cut out the call to initgroups() if the daemon is not
2344 60. The Exim user and group can now be bound into the binary as text strings
2345 that are looked up at the start of Exim's processing.
2347 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
2349 62. Added $mailstore_basename variable.
2351 63. Installed patch to sieve.c from Michael Haardt.
2353 64. When Exim failed to open the panic log after failing to open the main log,
2354 the original message it was trying to log was written to stderr and debug
2355 output, but if they were not available (the usual case in production), it
2356 was lost. Now it is written to syslog before the two lines that record the
2357 failures to open the logs.
2359 65. Users' Exim filters run in subprocesses under the user's uid. It is
2360 possible for a "deliver" command or an alias in a "personal" command to
2361 provoke an address rewrite. If logging of address rewriting is configured,
2362 this fails because the process is not running as root or exim. There may be
2363 a better way of dealing with this, but for the moment (because 4.30 needs
2364 to be released), I have disabled address rewrite logging when running a
2365 filter in a non-root, non-exim process.
2371 1. The buildconfig auxiliary program wasn't quoting the value set for
2372 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
2373 not defined. This bug was masked in 4.22 by the effect that was fixed in
2376 2. Some messages that were rejected after a message id was allocated were
2377 shown as "incomplete" by exigrep. It no longer does this for messages that
2378 are rejected by local_scan() or the DATA or non-SMTP ACLs.
2380 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
2381 have allow_domain_literals set, the ID did not get logged in the <= line.
2382 Domain literals are now always recognized in Message-ID: header lines.
2384 4. The first argument for a ${extract expansion item is the key name or field
2385 number. Leading and trailing spaces in this item were not being ignored,
2386 causing some misleading effects.
2388 5. When deliver_drop_privilege was set, single queue runner processes started
2389 manually (i.e. by the command "exim -q") or by the daemon (which uses the
2390 same command in the process it spins off) were not dropping privilege.
2392 6. When the daemon running as "exim" started a queue runner, it always
2393 re-executed Exim in the spun-off process. This is a waste of effort when
2394 deliver_drop_privilege is set. The new process now just calls the
2395 queue-runner function directly.
2401 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
2404 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
2405 ignored. Though the use of -oP was forcing the writing of a pid file, it
2406 was always written to the default place.
2408 3. If the message "no IP address found for host xxxx" is generated during
2409 incoming verification, it is now followed by identification of the incoming
2410 connection (so you can more easily find what provoked it).
2412 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
2414 5. Added some features to "harden" Exim a bit more against certain attacks:
2416 (a) There is now a build-time option called FIXED_NEVER_USERS that can
2417 be put in Local/Makefile. This is like the never_users runtime option,
2418 but it cannot be overridden. The default setting is "root".
2420 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
2421 prefix string with which any file named in a -C command line option
2424 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
2425 is retained for -C and -D only if the caller of Exim is root. Without
2426 it, the exim user may also use -C and -D and retain privilege.
2428 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
2429 command line option is disabled.
2431 6. Macro names set by the -D option must start with an upper case letter, just
2432 like macro names defined in the configuration file.
2434 7. Added "dereference=" facility to LDAP.
2436 8. Two instances of the typo "uknown" in the source files are fixed.
2438 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
2439 the Configure-Makefile script screwed up while processing it.
2441 10. Incorporated PCRE 4.4.
2443 11. The SMTP synchronization check was not operating right at the start of an
2444 SMTP session. For example, it could not catch a HELO sent before the client
2445 waited for the greeting. There is now a check for outstanding input at the
2446 point when the greeting is written. Because of the duplex, asynchronous
2447 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
2448 way, but not yet received, when the check is performed.
2450 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
2451 on TCP/IP sockets, because this apparently causes some broken clients to
2454 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
2455 unchanged) from the Cygwin maintainer.
2457 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
2458 was supported instead of testing for mbx. Effectively a typo.
2460 15. The spa authenticator server code was not checking that the input it
2461 received was valid base64.
2463 16. The debug output line for the "set" modifier in ACLs was not showing the
2464 name of the variable that was being set.
2466 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
2468 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
2469 lookup on its own. Something else was needed to trigger the lookup. For
2470 example, a match in host_lookup or the need for a host name in a host list.
2471 Now, if $sender_host_name is referenced and the host name has not yet been
2472 looked up, a lookup is performed. If the lookup fails, the variable remains
2473 empty, and $host_lookup_failed is set to "1".
2475 19. Added "eqi" as a case-independent comparison operator.
2477 20. The saslauthd authentication condition could segfault if neither service
2478 nor realm was specified.
2480 21. If an overflowing value such as "2048M" was set for message_size_limit, the
2481 error message that was logged was misleading, and incoming SMTP
2482 connections were dropped. The message is now more accurate, and temporary
2483 errors are given to SMTP connections.
2485 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
2486 (except RSET) with a 421 error, until QUIT is received. However, it was
2487 failing to send a response to QUIT.
2489 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
2490 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
2491 ACL is now run after the helo_try_verify_hosts code.
2493 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
2494 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
2495 case-independent, so other case variants are also recognized). Apparently
2496 some systems use these upper case variants.
2498 25. If more than two messages were waiting for the same host, and a transport
2499 filter was specified for the transport, Exim sent two messages over the
2500 same TCP/IP connection, and then failed with "socket operation on non-
2501 socket" when it tried to send the third.
2503 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
2505 27. The extern definition of crypt16() in expand.c was not being excluded when
2506 the OS had its own crypt16() function.
2508 28. Added bounce_return_body as a new option, and bounce_return_size_limit
2509 as a preferred synonym for return_size_limit, both as an option and as an
2512 29. Added LIBS=-liconv to OS/Makefile-OSF1.
2514 30. Changed the default configuration ACL to relax the local part checking rule
2515 for addresses that are not in any local domains. For these addresses,
2516 slashes and pipe symbols are allowed within local parts, but the sequence
2517 /../ is explicitly forbidden.
2519 31. SPA server authentication was not clearing the challenge buffer before
2522 32. log_message in a "warn" ACL statement was writing to the reject log as
2523 well as to the main log, which contradicts the documentation and doesn't
2524 seem right (because no rejection is happening). So I have stopped it.
2526 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
2527 However, I am unable to do any testing of this.
2529 34. Fixed an infelicity in the appendfile transport. When checking directories
2530 for a mailbox, to see if any needed to be created, it was accidentally
2531 using path names with one or more superfluous leading slashes; tracing
2532 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
2534 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
2535 contents are added to the log line that is written for every discarded
2536 recipient. (Previously a log_message setting was ignored.)
2538 36. The ${quote: operator now quotes the string if it is empty.
2540 37. The install script runs exim in order to find its version number. If for
2541 some reason other than non-existence or emptiness, which it checks, it
2542 could not run './exim', it was installing it with an empty version number,
2543 i.e. as "exim-". This error state is now caught, and the installation is
2546 38. An argument was missing from the function that creates an error message
2547 when Exim fails to connect to the socket for saslauthd authentication.
2548 This could cause Exim to crash, or give a corrupted message.
2550 39. Added isip, isip4, and isip6 to ${if conditions.
2552 40. The ACL variables $acl_xx are now saved with the message, and can be
2553 accessed later in routers, transports, and filters.
2555 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
2556 strings in the file are not string-expanded.
2558 42. If a MAIL command specified a SIZE value that was too large to fit into an
2559 int variable, the check against message_size_limit failed. Such values are
2560 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
2561 day this will have to be increased, but I don't think I want to be around
2562 when emails are that large.
2569 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
2570 iconv() is not standard in FreeBSD.
2572 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
2573 IPv6 enabled. The observed symptom was a segmentation fault on return from
2574 the function os_common_find_running_interfaces() in src/os.c.
2576 3. In the check_special_case() function in daemon.c I had used "errno" as an
2577 argument name, which causes warnings on some systems. This was basically a
2578 typo, since it was named "eno" in the comments!
2580 4. The code that waits for the clock to tick (at a resolution of some fraction
2581 of a second) so as to ensure message-id uniqueness was always waiting for
2582 at least one whole tick, when it could have waited for less. [This is
2583 almost certainly not relevant at current processor speeds, where it is
2584 unlikely to ever wait at all. But we try to future-proof.]
2586 5. The function that sleeps for a time interval that includes fractions of a
2587 second contained a race. It did not block SIGALRM between setting the
2588 timer, and suspending (a couple of lines later). If the interval was short
2589 and the sigsuspend() was delayed until after it had expired, the suspension
2590 never ended. On busy systems this could lead to processes getting stuck for
2593 6. Some uncommon configurations may cause a lookup to happen in a queue runner
2594 process, before it forks any delivery processes. The open lookup caching
2595 mechanism meant that the open file or database connection was passed into
2596 the delivery process. The problem was that delivery processes always tidy
2597 up cached lookup data. This could cause a problem for the next delivery
2598 process started by the queue runner, because the external queue runner
2599 process does not know about the closure. So the next delivery process
2600 still has data in the lookup cache. In the case of a file lookup, there was
2601 no problem because closing a file descriptor in a subprocess doesn't affect
2602 the parent. However, if the lookup was caching a connection to a database,
2603 the connection was closed, and the second delivery process was likely to
2604 see errors such as "PGSQL: query failed: server closed the connection
2605 unexpectedly". The problem has been fixed by closing all cached lookups
2606 in a queue runner before running a delivery process.
2608 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
2609 seem to have the "const" qualifier which it has on other OS. I've
2612 8. Change 4.21/2 was too strict. It is only if there are two authenticators
2613 *of the same type* (client or server) with the same public name that an
2614 error should be diagnosed.
2616 9. When Exim looked up a host name for an IP address, but failed to find the
2617 original IP address when looking up the host name (a safety check), it
2618 output the message "<ip address> does not match any IP for NULL", which was
2619 confusing, to say the least. The bug was that the host name should have
2620 appeared instead of "NULL".
2622 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
2623 user that is built into the binary, and the -C or -D options is used, root
2624 privilege is dropped before the configuration file is read. In addition,
2625 logging is switched to stderr instead of the normal log files. If the
2626 configuration then re-defines the Exim user, the unprivileged environment
2627 is probably not what is expected, so Exim logs a panic warning message (but
2630 However, if deliver_drop_privilege is set, the unprivileged state may well
2631 be exactly what is intended, so the warning has been cut out in that case,
2632 and Exim is allowed to try to write to its normal log files.
2638 1. smtp_return_error_details was not giving details for temporary sender
2639 or receiver verification errors.
2641 2. Diagnose a configuration error if two authenticators have the same public
2644 3. Exim used not to create the message log file for a message until the first
2645 delivery attempt. This could be confusing when incoming messages were held
2646 for policy or load reasons. The message log file is now created at the time
2647 the message is received, and an initial "Received" line is written to it.
2649 4. The automatically generated man page for command line options had a minor
2650 bug that caused no ill effects; however, a more serious problem was that
2651 the procedure for building the man page automatically didn't always
2652 operate. Consequently, release 4.20 contains an out-of-date version. This
2653 shouldn't happen again.
2655 5. When building Exim with embedded Perl support, the script that builds the
2656 Makefile was calling 'perl' to find its compile-time parameters, ignoring
2657 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
2659 6. The freeze_tell option was not being used for messages that were frozen on
2660 arrival, either by an ACL or by local_scan().
2662 7. Added the smtp_incomplete_transaction log selector.
2664 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
2665 was accepting AUTH without a new EHLO.
2667 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
2668 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
2671 10. Logging of TCP/IP connections (when configured) now happens in the main
2672 daemon process instead of the child process, so that the TCP/IP connection
2673 count is more accurate (but it can never be perfect).
2675 11. The use of "drop" in a nested ACL was not being handled correctly in the
2676 outer ACL. Now, if condition failure induced by the nested "drop" causes
2677 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
2678 or "require"), the connection is dropped.
2680 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
2681 that yield "discard" can now be used with an "accept" or a "discard" verb,
2682 but an error is generated for any others (because I can't see a useful way
2683 to define what should happen).
2685 13. When an ACL is read dynamically from a file (or anywhere else), the lines
2686 are now processed in the same way as lines in the Exim configuration file.
2687 In particular, continuation lines are supported.
2689 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
2691 15. Added -ti meaning -t -i.
2693 16. Check for letters, digits, hyphens, and dots in the names of dnslist
2694 domains, and warn by logging if others are found.
2696 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
2697 returned from GIFCONF when Exim is trying to find the list of interfaces on
2698 a host. The code in os.c has been modified to copy each ifreq to an aligned
2699 structure in all cases.
2701 Also, in some cases, the returned ifreq's were being copied to a 'struct
2702 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
2703 means the last couple of bytes of an IPv6 address could be chopped if the
2704 ifreq contained only a normal sockaddr (14 bytes storage).
2706 18. Named domain lists were not supported in the hosts_treat_as_local option.
2707 An entry such as +xxxx was not recognized, and was treated as a literal
2710 19. Ensure that header lines added by a DATA ACL are included in the reject log
2711 if the ACL subsequently rejects the message.
2713 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
2714 MD5 (which is deprecated).
2716 21. When testing a filter file using -bf, Exim was writing a message when it
2717 took the sender from a "From " line in the message, but it was not doing so
2718 when it took $return_path from a Return-Path: header line. It now does.
2720 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
2721 with a valid header line field name (a series of printing characters
2722 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
2724 23. Changed "disc" in the source to "disk" to conform to the documentation and
2725 the book and for uniformity.
2727 24. Ignore Sendmail's -Ooption=value command line item.
2729 25. When execve() failed while trying to run a command in a pipe transport,
2730 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
2731 could be confused with a return value of 69 from the command itself. This
2732 has been changed to 127, the value the shell returns if it is asked to run
2733 a non-existent command. The wording for the related log line suggests a
2734 non-existent command as the problem.
2736 26. If received_header_text expands to an empty string, do not add a Received:
2737 header line to the message. (Well, it adds a token one on the spool, but
2738 marks it "old" so that it doesn't get used or transmitted.)
2740 27. Installed eximstats 1.28 (addition of -nt option).
2742 28. There was no check for failure on the call to getsockname() in the daemon
2743 code. This can fail if there is a shortage of resources on the system, with
2744 ENOMEM, for example. A temporary error is now given on failure.
2746 29. Contrary to the C standard, it seems that in some environments, the
2747 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
2748 program. Exim now does this explicitly; it affects the formatting of
2749 timestamps using strftime().
2751 30. If exiqsumm was given junk data, it threw up some uninitialized variable
2752 complaints. I've now initialized all the variables, to avoid this.
2754 32. Header lines added by a system filter were not being "seen" during
2755 transport-time rewrites.
2757 33. The info_callback() function passed to OpenSSL is set up with type void
2758 (*)(SSL *, int, int), as described somewhere. However, when calling the
2759 function (actually a macro) that sets it up, the type void(*)() is
2760 expected. I've put in a cast to prevent warnings from picky compilers.
2762 34. If a DNS black list lookup found a CNAME record, but there were no A
2763 records associated with the domain it pointed at, Exim crashed.
2765 35. If a DNS black list lookup returned more than one A record, Exim ignored
2766 all but the first. It now scans all returned addresses if a particular IP
2767 value is being sought. In this situation, the contents of the
2768 $dnslist_value variable are a list of all the addresses, separated by a
2771 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
2772 to accept a host name and all its aliases if the forward lookup for any of
2773 them yielded the IP address of the incoming connection. Now it accepts only
2774 those names whose forward lookup yields the correct IP address. Any other
2775 names are discarded. This closes a loophole whereby a rogue DNS
2776 administrator could create reverse DNS records to break through a
2777 wildcarded host restriction in an ACL.
2779 37. If a user filter or a system filter that ran in a subprocess used any of
2780 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
2781 the wrong values were passed to the pipe command ($thisaddress had the
2782 value of $0, $0 had the value of $1, etc). This bug was introduced by
2783 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
2785 38. Improved the line breaking for long SMTP error messages from ACLs.
2786 Previously, if there was no break point between 40 and 75 characters, Exim
2787 left the rest of the message alone. Two changes have been made: (a) I've
2788 reduced the minimum length to 35 characters; (b) if it can't find a break
2789 point between 35 and 75 characters, it looks ahead and uses the first one
2790 that it finds. This may give the occasional overlong line, but at least the
2791 remaining text gets split now.
2793 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
2794 file descriptors might be low, and that setting 1000 would always raise it.
2795 It turns out that in some environments, the limit is already over 1000 and
2796 that lowering it causes trouble. So now Exim takes care not to decrease it.
2798 40. When delivering a message, the value of $return_path is set to $sender_
2799 address at the start of routing (routers may change the value). By an
2800 oversight, this default was not being set up when an address was tested by
2801 -bt or -bv, which affected the outcome if any router or filter referred to
2804 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
2805 log only when "message" or "log_message" are set. However, if one of the
2806 conditions was an address verification, or a call to a nested ACL, the
2807 messages generated by the underlying test were being passed through. This
2808 no longer happens. The underlying message is available in $acl_verify_
2809 message for both "message" and "log_message" expansions, so it can be
2810 passed through if needed.
2812 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
2813 new expansion $bh_ to give the encoded byte string without charset
2814 translation. Translation happens only if iconv() is available; HAVE_ICONV
2815 indicates this at build time. HEADERS_CHARSET gives the charset to
2816 translate to; headers_charset can change it in the configuration, and
2817 "headers charset" can change it in an individual filter file.
2819 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
2820 that creates RFC 2047 encoded "words" labels them as that charset instead
2821 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
2822 expansion operator; (ii) when Exim creates a From: line for a local
2823 message; (iii) when a header line is rewritten to include a "phrase" part.
2825 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
2826 buggy, causing it to skip the first lines of messages whose message ID
2827 ended in 'D'. This would not have bitten before Exim release 4.14, because
2828 message IDs were unlikely to end in 'D' before then. The effect was to have
2829 incorrect size information for certain domains.
2831 45. #include "config.h" was missing at the start of the crypt16.c module. This
2832 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
2835 46. If there was a timeout during a "random" callout check, Exim treated it as
2836 a failure of the random address, and carried on sending RSET and the real
2837 address. If the delay was just some slowness somewhere, the response to the
2838 original RCPT would be taken as a response to RSET and so on, causing
2839 mayhem of various kinds.
2841 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
2842 when I implemented it. It didn't allow for the fact that some option values
2843 may legitimatetly be negative (e.g. size_addition), and it didn't even do
2844 the right test for positive values.
2846 48. Domain names in DNS records are case-independent. Exim always looks them up
2847 in lower case. Some resolvers return domain names in exactly the case they
2848 appear in the zone file, that is, they may contain uppercase letters. Not
2849 all resolvers do this - some return always lower case. Exim was treating a
2850 change of case by a resolver as a change of domain, similar to a widening
2851 of a domain abbreviation. This triggered its re-routing code and so it was
2852 trying to route what was effectively the same domain again. This normally
2853 caused routing to fail (because the router wouldn't handle the domain
2854 twice). Now Exim checks for this case specially, and just changes the
2855 casing of the domain that it ultimately uses when it transmits the message
2858 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
2861 50. If a filter generated a file delivery with a non-absolute name (possible if
2862 no home directory exists for the router), the forbid_file option was not
2865 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
2866 the existing equality matching.
2868 52. Exim was using ints instead of ino_t variables in some places where it was
2869 dealing with inode numbers.
2871 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
2872 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
2873 called TMPDIR, and if it finds it is different, it changes its value.
2875 54. The smtp_printf() function is now made available to local_scan() so
2876 additional output lines can be written before returning. There is also an
2877 smtp_fflush() function to enable the detection of a dropped connection.
2878 The variables smtp_input and smtp_batched_input are exported to
2881 55. Changed the default runtime configuration: the message "Unknown user"
2882 has been removed from the ACL, and instead placed on the localuser router,
2883 using the cannot_route_message feature. This means that any verification
2884 failures that generate their own messages won't get overridden. Similarly,
2885 the "Unrouteable address" message that was in the ACL for unverifiable
2886 relay addresses has also been removed.
2888 56. Added hosts_avoid_esmtp to the smtp transport.
2890 57. The exicyclog script was not checking for the esoteric option
2891 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
2892 will work only if exicyclog is run under the appropriate euid.
2894 58. Following a discussion on the list, the rules by which Exim recognises line
2895 endings on incoming messages have been changed. The -dropcr and drop_cr
2896 options are now no-ops, retained only for backwards compatibility. The
2897 following line terminators are recognized: LF CRLF CR. However, special
2898 processing applies to CR:
2900 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
2901 nor a local message in the state where . is a terminator.
2903 (ii) If a bare CR is encountered in a header line, an extra space is added
2904 after the line terminator so as not to end the header. The reasoning
2905 behind this is that bare CRs in header lines are most likely either
2906 to be mistakes, or people trying to play silly games.
2908 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
2909 was being incorrectly given as 18 bytes larger than it should have been.
2910 This is a VOB (very old bug).
2912 60. This may never have affected anything current, but just in case it has:
2913 When the local host is found other than at the start of a list of hosts,
2914 the local host, those with the same MX, and any that follow, are discarded.
2915 When the list in question was part of a longer list of hosts, the following
2916 hosts (not currently being processed) were also being discarded. This no
2917 longer happens. I'm not sure if this situation could ever has previously
2920 61. Added the "/MX" feature to lists of hosts in the manualroute and query
2923 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
2924 header. This is something that is recommended in a new Internet Draft, and
2925 is something that is documented as being done by Sendmail. There are two
2926 possible values. For messages generated by the autoreply transport, Exim
2929 Auto-Submitted: auto-replied
2931 whereas for all other generated messages (e.g. bounces) it adds
2933 Auto-Submitted: auto-generated
2935 63. The "personal" condition in filters now includes a test for the
2936 Auto-Submitted: header. If it contains the string "auto-" the message it
2937 not considered personal.
2939 64. Added rcpt_include_affixes as a generic transport option.
2941 65. Added queue_only_override (default true).
2943 66. Added the syslog_duplication option.
2945 67. If what should have been the first header line of a message consisted of
2946 a space followed by a colon, Exim was mis-interpreting it as a header line.
2947 It isn't of course - it is syntactically invalid and should therefore be
2948 treated as the start of the message body. The misbehaviour could have
2949 caused a number of strange effects, including loss of data in subsequent
2950 header lines, and spool format errors.
2952 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
2953 client host had authenticated. This control can now be exercised by an ACL
2954 for more flexibility.
2956 69. By default, callouts do not happen when testing with -bh. There is now a
2957 variant, -bhc, which does actually run the callout code, including
2958 consulting and updating the callout cache.
2960 70. Added support for saslauthd authentication, courtesy of Alexander
2963 71. If statvfs() failed on the spool or log directories while checking their
2964 size for availability, Exim confusingly gave the error "space shortage".
2965 Furthermore, in debugging mode it crashed with a floating point exception.
2966 These checks are done if check_{spool,log}_{space,inodes} are set, and when
2967 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
2968 serious problem, Exim now writes to the main and panic logs when this
2969 happens, with details of the failure. It then refuses to accept the
2970 incoming message, giving the message "spool directory problem" or "log
2971 directory problem" with a 421 code for SMTP messages.
2973 72. When Exim is about to re-exec itself, it ensures that the file descriptors
2974 0, 1, and 2 exist, because some OS complain for execs without them (see
2975 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
2976 descriptors. However, the code omitted to check that the open succeeded,
2977 causing mysterious errors if for some reason the permissions on /dev/null
2978 got screwed. Now Exim writes a message to the main and panic logs, and
2979 bombs out if it can't open /dev/null.
2981 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
2982 interact so that it is all more flexible. It is supposed to remain
2983 backwards compatible. Also added extra_local_interfaces.
2985 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
2986 to bomb out with an assertion failure - to the client this appears as a
2987 connection drop. This problem occurs in the part of the code that was taken
2988 from the Samba project. Fortunately, the assertion is in a very simple
2989 function, so I have fixed this by reproducing the function inline in the
2990 one place where it is called, and arranging for authentication to fail
2991 instead of killing the process with assert().
2993 75. The SPA client code was not working when the server requested OEM rather
2994 than Unicode encoding.
2996 76. Added code to make require_files with a specific uid setting more usable in
2997 the case where statting the file as root fails - usually a non-root-mounted
2998 NFS file system. When this happens and the failure is EACCES, Exim now
2999 forks a subprocess and does the per-uid checking as the relevant uid.
3001 77. Added process_log_path.
3003 78. If log_file_path was not explicitly set, a setting of check_log_space or
3004 check_log_inodes was ignored.
3006 79. If a space check for the spool or log partitions fails, the incident is now
3007 logged. Of course, in the latter case the data may get lost...
3009 80. Added the %p formatting code to string_format() so that it can be used to
3010 print addresses in debug_print(). Adjusted all the address printing in the
3011 debugging in store.c to use %p rather than %d.
3013 81. There was a concern that a line of code in smtp_in.c could overflow a
3014 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
3015 initially expressed, the concern was not well-founded, because trailing
3016 spaces are removed early. However, if the trailing spaces were followed by
3017 a NULL, they did not get removed, so the overflow was possible. Two fixes
3020 (a) I re-wrote the offending code in a cleaner fashion.
3021 (b) If an incoming SMTP command contains a NULL character, it is rejected
3024 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
3025 runs initgroups(), so that if the Exim user is in any additional groups,
3026 they will be used during message reception.
3032 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob