1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.541 2008/01/30 20:09:23 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
10 When building exim an external PCRE library is now needed -
11 PCRE is a system library on the majority of modern systems.
12 See entry on PCRE_LIBS in EDITME file.
14 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
15 conversation. Added nologin parameter to request.
16 Patch contributed by Kirill Miazine
18 TF/01 Do not log submission mode rewrites if they do not change the address.
20 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
22 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
23 log files in place. Contributed by Roberto Lima
29 TK/01 Add preliminary DKIM support. Currently requires a forked version of
30 ALT-N's libdkim that I have put here:
31 http://duncanthrax.net/exim-experimental/
33 Note to Michael Haardt: I had to rename some vars in sieve.c. They
34 were called 'true' and it seems that C99 defines that as a reserved
35 keyword to be used with 'bool' variable types. That means you could
36 not include C99-style headers which use bools without triggering
37 build errors in sieve.c.
39 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
40 as mailq or other aliases. Changed the --help handling significantly
41 to do whats expected. exim_usage() emits usage/help information.
43 SC/01 Added the -bylocaldomain option to eximstats.
45 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
47 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
49 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
55 PH/01 Another patch from the Sieve maintainer.
57 PH/02 When an IPv6 address is converted to a string for single-key lookup
58 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
59 dots are used instead of colons so that keys in lsearch files need not
60 contain colons. This was done some time before quoting was made available
61 in lsearch files. However, iplsearch files do require colons in IPv6 keys
62 (notated using the quote facility) so as to distinguish them from IPv4
63 keys. This meant that lookups for IP addresses in host lists did not work
64 for iplsearch lookups.
66 This has been fixed by arranging for IPv6 addresses to be expressed with
67 colons if the lookup type is iplsearch. This is not incompatible, because
68 previously such lookups could never work.
70 The situation is now rather anomolous, since one *can* have colons in
71 ordinary lsearch keys. However, making the change in all cases is
72 incompatible and would probably break a number of configurations.
74 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
77 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
78 conversion specification without a maximum field width, thereby enabling
79 a rogue spamd server to cause a buffer overflow. While nobody in their
80 right mind would setup Exim to query an untrusted spamd server, an
81 attacker that gains access to a server running spamd could potentially
82 exploit this vulnerability to run arbitrary code as the Exim user.
84 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
85 $primary_hostname instead of what libspf2 thinks the hosts name is.
87 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
88 a directory entry by the name of the lookup key. Previously, if a
89 symlink pointed to a non-existing file or a file in a directory that
90 Exim lacked permissions to read, a lookup for a key matching that
91 symlink would fail. Now it is enough that a matching directory entry
92 exists, symlink or not. (Bugzilla 503.)
94 PH/03 The body_linecount and body_zerocount variables are now exported in the
97 PH/04 Added the $dnslist_matched variable.
99 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
100 This means they are set thereafter only if the connection becomes
103 PH/06 Added the client_condition to authenticators so that some can be skipped
104 by clients under certain conditions.
106 PH/07 The error message for a badly-placed control=no_multiline_responses left
107 "_responses" off the end of the name.
109 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
111 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
112 (without spaces) instead of just copying the configuration text.
114 PH/10 Added the /noupdate option to the ratelimit ACL condition.
116 PH/11 Added $max_received_linelength.
118 PH/12 Added +ignore_defer and +include_defer to host lists.
120 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
121 way in which PCRE > 7.0 is built.
123 PH/14 Implemented queue_only_load_latch.
125 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
126 MAIL command. The effect was to mangle the value on 64-bit systems.
128 PH/16 Another patch from the Sieve maintainer.
130 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
132 PH/18 If a system quota error occurred while trying to create the file for
133 a maildir delivery, the message "Mailbox is full" was not appended to the
134 bounce if the delivery eventually timed out. Change 4.67/27 below applied
135 only to a quota excession during the actual writing of the file.
137 PH/19 It seems that peer DN values may contain newlines (and other non-printing
138 characters?) which causes problems in log lines. The DN values are now
139 passed through string_printing() before being added to log lines.
141 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
142 and InterBase are left for another time.)
144 PH/21 Added message_body_newlines option.
146 PH/22 Guard against possible overflow in moan_check_errorcopy().
148 PH/23 POSIX allows open() to be a macro; guard against that.
150 PH/24 If the recipient of an error message contained an @ in the local part
151 (suitably quoted, of course), incorrect values were put in $domain and
152 $local_part during the evaluation of errors_copy.
158 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
159 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
162 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
163 issue a MAIL command.
165 PH/02 In an ACL statement such as
167 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
169 if a client was not listed at all, or was listed with a value other than
170 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
171 the condition was not true (as it should be), so access was not denied.
172 The bug was that the ! inversion was incorrectly passed on to the second
173 item. This has been fixed.
175 PH/03 Added additional dnslists conditions == and =& which are different from
176 = and & when the dns lookup returns more than one IP address.
178 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
179 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
181 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
182 FSYNC, which compiles an option called disable_fsync that allows for
183 bypassing fsync(). The documentation is heavily laced with warnings.
185 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
187 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
188 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
189 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
190 including adding "make clean"; (3) Added -fPIC when compiling the test
191 dynamically loaded module, to get rid of a warning.
193 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
194 message fails, move_frozen_messages = true and ignore_bounce_errors_after
195 = 0s. The bug is otherwise harmless.
197 PH/07 There was a bug in the dovecot authenticator such that the value of
198 $auth1 could be overwritten, and so not correctly preserved, after a
199 successful authentication. This usually meant that the value preserved by
200 the server_setid option was incorrect.
202 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
204 PH/09 Installed PCRE release 7.0.
206 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
207 run for batched SMTP input. It is now run at the start of every message
208 in the batch. While fixing this I discovered that the process information
209 (output by running exiwhat) was not always getting set for -bs and -bS
210 input. This is fixed, and it now also says "batched" for BSMTP.
212 PH/11 Added control=no_pipelining.
214 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
215 patch, slightly modified), and move the expansion of helo_data till after
216 the connection is made in the smtp transport (so it can use these
219 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
221 PH/14 Added log_selector = +pid.
223 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
225 PH/16 Add ${if forany and ${if forall.
227 PH/17 Added dsn_from option to vary the From: line in DSNs.
229 PH/18 Flush SMTP output before performing a callout, unless control =
230 no_callout_flush is set.
232 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
233 was true (the default) a successful delivery failed to delete the retry
234 item, thus causing premature timeout of the address. The bug is now
237 PH/20 Added hosts_avoid_pipelining to the smtp transport.
239 PH/21 Long custom messages for fakedefer and fakereject are now split up
240 into multiline reponses in the same way that messages for "deny" and
241 other ACL rejections are.
243 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
244 with slight modification.
246 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
247 draft, changing the syntax and factoring some duplicate code".
249 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
250 for deliveries of the second and subsequent messages over the same SMTP
253 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
254 ${reduce, with only minor "tidies".
256 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
258 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
259 expansion side effects.
261 PH/27 When a message times out after an over-quota error from an Exim-imposed
262 quota, the bounce message says "mailbox is full". This message was not
263 being given when it was a system quota that was exceeded. It now should
266 MH/03 Made $recipients available in local_scan(). local_scan() already has
267 better access to the recipient list through recipients_list[], but
268 $recipients can be useful in postmaster-provided expansion strings.
270 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
271 in the case of a MAIL command with additional options following the
272 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
273 were accidentally chopped off.
275 PH/29 SMTP synchronization checks are implemented when a command is read -
276 there is a check that no more input is waiting when there shouldn't be
277 any. However, for some commands, a delay in an ACL can mean that it is
278 some time before the response is written. In this time, more input might
279 arrive, invalidly. So now there are extra checks after an ACL has run for
280 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
281 pipelining has not been advertised.
283 PH/30 MH's patch to allow iscntrl() characters to be list separators.
285 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
286 returned in the SMTP response when smtp_return_error_details was false.
289 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
290 instead of the C I/O that was originally supplied, because problems were
293 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
294 Exim which did not show up earlier: it was assuming that a call to
295 SSL_CTX_set_info_callback() might give an error value. In fact, there is
296 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
297 was a macro that became an assignment, so it seemed to work. This has
298 changed to a proper function call with a void return, hence the compile
299 error. Exim's code has been fixed.
301 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
304 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
306 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
308 PH/37 If a message is not accepted after it has had an id assigned (e.g.
309 because it turns out to be too big or there is a timeout) there is no
310 "Completed" line in the log. When some messages of this type were
311 selected by exigrep, they were listed as "not completed". Others were
312 picked up by some special patterns. I have improved the selection
313 criteria to be more general.
315 PH/38 The host_find_failed option in the manualroute router can now be set
316 to "ignore", to completely ignore a host whose IP address cannot be
317 found. If all hosts are ignored, the behaviour is controlled by the new
318 host_all_ignored option.
320 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
321 homing or because of multiple MX records with /mx) generated more than
322 one IP address, and the following item turned out to be the local host,
323 all the secondary addresses of the first item were incorrectly removed
324 from the list, along with the local host and any following hosts (which
325 is what is supposed to happen).
327 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
328 whoever called Exim into the -H file. In the case of the daemon it was
329 behaving confusingly. When first started, it used values for whoever
330 started the daemon, but after a SIGHUP it used the Exim user (because it
331 calls itself on a restart). I have changed the code so that it now always
334 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
335 message are rejected with the same error (e.g. no authentication or bad
336 sender address), and a DATA command is nevertheless sent (as can happen
337 with PIPELINING or a stupid MUA), the error message that was given to the
338 RCPT commands is included in the rejection of the DATA command. This is
339 intended to be helpful for MUAs that show only the final error to their
342 PH/42 Another patch from the Sieve maintainer.
344 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
345 Eximstats - Fixed some broken HTML links and added missing column headers
347 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
348 columns for Rejects, Temp Rejects, Ham, and Spam rows.
350 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
352 PH/43 Yet another patch from the Sieve maintainer.
354 PH/44 I found a way to check for a TCP/IP connection going away before sending
355 the response to the final '.' that terminates a message, but only in the
356 case where the client has not sent further data following the '.'
357 (unfortunately, this is allowed). However, in many cases there won't be
358 any further data because there won't be any more messages to send. A call
359 to select() can be used: if it shows that the input is "ready", there is
360 either input waiting, or the socket has been closed. An attempt to read
361 the next input character can distinguish the two cases. Previously, Exim
362 would have sent an OK response which the client would never have see.
363 This could lead to message repetition. This fix should cure that, at
364 least in a lot of common cases.
366 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
367 advertised in response to EHLO.
373 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
374 fixed by 4.65/MH/01 (is this a record?) are fixed:
376 (i) An empty string was always treated as zero by the numeric comparison
377 operators. This behaviour has been restored.
379 (ii) It is documented that the numeric comparison operators always treat
380 their arguments as decimal numbers. This was broken in that numbers
381 starting with 0 were being interpreted as octal.
383 While fixing these problems I realized that there was another issue that
384 hadn't been noticed. Values of message_size_limit (both the global option
385 and the transport option) were treated as octal if they started with 0.
386 The documentation was vague. These values are now always treated as
387 decimal, and I will make that clear in the documentation.
393 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
394 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
397 MH/01 Don't check that the operands of numeric comparison operators are
398 integers when their expansion is in "skipping" mode (fixes bug
399 introduced by 4.64-PH/07).
401 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
402 child addresses, Exim now panics and dies. Previously, because the count
403 is held in a short int, deliveries were likely to be lost. As such a
404 large number of recipients for a single message is ridiculous
405 (performance will be very, very poor), I have chosen to impose a limit
406 rather than extend the field.
412 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
413 leftover -K file (the existence of which was triggered by #402).
414 While we were at it, introduced process PID as part of the -K
415 filename. This should rule out race conditions when creating
418 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
419 processing considerably. Previous code took too long for large mails,
420 triggering a timeout which in turn triggers #401.
422 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
423 in the DK code in transports.c. sendfile() is not really portable,
424 hence the _LINUX specificness.
426 TF/01 In the add_headers option to the mail command in an Exim filter,
427 there was a bug that Exim would claim a syntax error in any
428 header after the first one which had an odd number of characters
431 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
432 callout verification, Exim cached a "reject" for the entire domain. This
433 is correct for most verifications, but it is not correct for a recipient
434 verification with use_sender or use_postmaster set, because in that case
435 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
436 case of MAIL FROM:<> rejection from other early rejections (e.g.
437 rejection of HELO). When verifying a recipient using a non-null MAIL
438 address, the cache is ignored if it shows MAIL FROM:<> rejection.
439 Whatever the result of the callout, the value of the domain cache is
440 left unchanged (for any other kind of callout, getting as far as trying
441 RCPT means that the domain itself is ok).
443 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
446 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
447 manifest itself as EPIPE rather than ECONNECT. When tidying away a
448 session, the daemon ignores ECONNECT errors and logs others; it now
449 ignores EPIPE as well.
451 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
452 (quoted-printable decoding).
454 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
455 later the small subsequent patch to fix an introduced bug.
457 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
459 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
461 PH/08 An error is now given if message_size_limit is specified negative.
463 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
464 to be given (somewhat) arbitrary names.
466 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
469 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
470 miscellaneous code fixes
472 PH/10 Added the log_reject_target ACL modifier to specify where to log
475 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
476 hostname. This is wrong, because it relates to the incoming message (and
477 probably the interface on which it is arriving) and not to the outgoing
478 callout (which could be using a different interface). This has been
479 changed to use the value of the helo_data option from the smtp transport
480 instead - this is what is used when a message is actually being sent. If
481 there is no remote transport (possible with a router that sets up host
482 addresses), $smtp_active_hostname is used.
484 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
485 tweaks were necessary in order to get it to work (see also 21 below):
486 (a) The code assumed that strncpy() returns a negative number on buffer
487 overflow, which isn't the case. Replaced with Exim's string_format()
489 (b) There were several signed/unsigned issues. I just did the minimum
490 hacking in of casts. There is scope for a larger refactoring.
491 (c) The code used strcasecmp() which is not a standard C function.
492 Replaced with Exim's strcmpic() function.
493 (d) The code set only $1; it now sets $auth1 as well.
494 (e) A simple test gave the error "authentication client didn't specify
495 service in request". It would seem that Dovecot has changed its
496 interface. Fortunately there's a specification; I followed it and
497 changed what the client sends and it appears to be working now.
499 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
502 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
503 address A is aliased to B and C, where B exists and C does not. Without
504 -v the output is "A verified" because verification stops after a
505 successful redirection if more than one address is generated. However,
506 with -v the child addresses are also verified. Exim was outputting "A
507 failed to verify" and then showing the successful verification for C,
508 with its parentage. It now outputs "B failed to verify", showing B's
509 parentage before showing the successful verification of C.
511 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
512 look up a TXT record in a specific list after matching in a combined
515 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
516 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
517 they consult the DNS. I had assumed they would set it the way they
518 wanted; and indeed my experiments on Linux seem to show that in some
519 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
520 To be on the safe side, however, I have now made the interface to
521 host_find_byname() similar to host_find_bydns(), with an argument
522 containing the DNS resolver options. The host_find_byname() function now
523 sets these options at its start, just as host_find_bydns() does. The smtp
524 transport options dns_qualify_single and dns_search_parents are passed to
525 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
526 of host_find_byname() use the default settings of RES_DEFNAMES
527 (qualify_single) but not RES_DNSRCH (search_parents).
529 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
530 spool_read_header() do less string testing, by means of a preliminary
531 switch on the second character of optional "-foo" lines. (This is
532 overdue, caused by the large number of possibilities that now exist.
533 Originally there were few.) While I was there, I also converted the
534 str(n)cmp tests so they don't re-test the leading "-" and the first
535 character, in the hope this might squeeze out yet more improvement.
537 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
538 flag allowing group syntax was set by the header_syntax check but not
539 turned off, possible causing trouble later; (2) The flag was not being
540 set at all for the header_verify test, causing "group"-style headers to
541 be rejected. I have now set it in this case, and also caused header_
542 verify to ignore an empty address taken from a group. While doing this, I
543 came across some other cases where the code for allowing group syntax
544 while scanning a header line wasn't quite right (mostly, not resetting
545 the flag correctly in the right place). These bugs could have caused
546 trouble for malformed header lines. I hope it is now all correct.
548 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
549 with the "reply" argument non-NULL. The code, however (which originally
550 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
551 but it didn't always do it. This confused somebody who was copying the
552 code for some other use. I have removed all the tests.
554 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
555 feature that was used to support insecure browsers during the U.S. crypto
556 embargo. It requires special client support, and Exim is probably the
557 only MTA that supported it -- and would never use it because real RSA is
558 always available. This code has been removed, because it had the bad
559 effect of slowing Exim down by computing (never used) parameters for the
560 RSA_EXPORT functionality.
562 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
563 authenticator to fail if there's a tab character in the incoming data
564 (there should never be unless someone is messing about, as it's supposed
565 to be base64-encoded). Also added, on Timo's advice, the "secured" option
566 if the connection is using TLS or if the remote IP is the same as the
567 local IP, and the "valid-client-cert option" if a client certificate has
570 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
571 authenticators. This can be used for authorization after authentication
572 succeeds. (In the case of plaintext, it servers for both authentication
575 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
576 if any retry times were supplied.
578 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
579 connection, where there is no client IP address to check. In this
580 situation, the verify now always succeeds.
582 PH/25 Applied John Jetmore's -Mset patch.
584 PH/26 Added -bem to be like -Mset, but loading a message from a file.
586 PH/27 In a string expansion for a processed (not raw) header when multiple
587 headers of the same name were present, leading whitespace was being
588 removed from all of them, but trailing whitespace was being removed only
589 from the last one. Now trailing whitespace is removed from each header
590 before concatenation. Completely empty headers in a concatenation (as
593 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
594 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
596 PH/29 [Removed. This was a change that I later backed out, and forgot to
597 correct the ChangeLog entry (that I had efficiently created) before
598 committing the later change.]
600 PH/30 Exim was sometimes attempting to deliver messages that had suffered
601 address errors (4xx response to RCPT) over the same connection as other
602 messages routed to the same hosts. Such deliveries are always "forced",
603 so retry times are not inspected. This resulted in far too many retries
604 for the affected addresses. The effect occurred only when there were more
605 hosts than the hosts_max_try setting in the smtp transport when it had
606 the 4xx errors. Those hosts that it had tried were not added to the list
607 of hosts for which the message was waiting, so if all were tried, there
608 was no problem. Two fixes have been applied:
610 (i) If there are any address or message errors in an SMTP delivery, none
611 of the hosts (tried or untried) are now added to the list of hosts
612 for which the message is waiting, so the message should not be a
613 candidate for sending over the same connection that was used for a
614 successful delivery of some other message. This seems entirely
615 reasonable: after all the message is NOT "waiting for some host".
616 This is so "obvious" that I'm not sure why it wasn't done
617 previously. Hope I haven't missed anything, but it can't do any
618 harm, as the worst effect is to miss an optimization.
620 (ii) If, despite (i), such a delivery is accidentally attempted, the
621 routing retry time is respected, so at least it doesn't keep
622 hammering the server.
624 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
625 in ${readsocket because some servers need this prod.
627 PH/32 Added some extra debug output when updating a wait-xxx database.
629 PH/33 The hint "could be header name not terminated by colon", which has been
630 given for certain expansion errors for a long time, was not being given
631 for the ${if def:h_colon_omitted{... case.
633 PH/34 The spec says: "With one important exception, whenever a domain list is
634 being scanned, $domain contains the subject domain." There was at least
635 one case where this was not true.
637 PH/35 The error "getsockname() failed: connection reset by peer" was being
638 written to the panic log as well as the main log, but it isn't really
639 panic-worthy as it just means the connection died rather early on. I have
640 removed the panic log writing for the ECONNRESET error when getsockname()
643 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
644 runs only) independently of the message's sender address. This meant
645 that, if the 4xx error was in fact related to the sender, a different
646 message to the same recipient with a different sender could confuse
647 things. In particualar, this can happen when sending to a greylisting
648 server, but other circumstances could also provoke similar problems.
649 I have changed the default so that the retry time for these errors is now
650 based a combination of the sender and recipient addresses. This change
651 can be overridden by setting address_retry_include_sender=false in the
654 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
655 remote server are returned as part of bounce messages. This was not
656 happening for LMTP over a pipe (the lmtp transport), but now it is the
657 same for both kinds of LMTP.
659 PH/38 Despite being documented as not happening, Exim was rewriting addresses
660 in header lines that were in fact CNAMEs. This is no longer the case.
662 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
663 and queue runs started by the daemon processed all messages. This has
664 been fixed so that -R and -S can now usefully be given with -q<time>.
666 PH/40 Import PCRE release 6.7 (fixes some bugs).
668 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
670 PH/42 Give an error if -q is specified more than once.
672 PH/43 Renamed the variables $interface_address and $interface_port as
673 $received_ip_address and $received_port, to make it clear that these
674 values apply to message reception, and not to the outgoing interface when
675 a message is delivered. (The old names remain recognized, of course.)
677 PH/44 There was no timeout on the connect() call when using a Unix domain
678 socket in the ${readsocket expansion. There now is.
680 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
681 be meaningful with "accept".
683 SC/01 Eximstats V1.43
684 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
686 SC/02 Eximstats V1.44
687 Use a glob alias rather than an array ref in the generated
688 parser. This improves both readability and performance.
690 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
691 Collect SpamAssassin and rejection statistics.
692 Don't display local sender or destination tables unless
693 there is data to show.
694 Added average volumes into the top table text output.
696 SC/04 Eximstats V1.46
697 Collect data on the number of addresses (recipients)
698 as well as the number of messages.
700 SC/05 Eximstats V1.47
701 Added 'Message too big' to the list of mail rejection
702 reasons (thanks to Marco Gaiarin).
704 SC/06 Eximstats V1.48
705 Mainlog lines which have GMT offsets and are too short to
706 have a flag are now skipped.
708 SC/07 Eximstats V1.49 (Alain Williams)
709 Added the -emptyok flag.
711 SC/08 Eximstats V1.50
712 Fixes for obtaining the IP address from reject messages.
714 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
715 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
716 whitesspace changes from 4.64-PH/27
718 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
721 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
722 are found, allow negative numbers in numeric criteria)
724 JJ/06 exipick.20061117.2, added new $message_body_missing variable
726 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
727 to match changes made in 4.64-PH/43
729 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
731 PH/47 Put in an explicit test for a DNS lookup of an address record where the
732 "domain" is actually an IP address, and force a failure. This locks out
733 those revolvers/nameservers that support "A-for-A" lookups, in
734 contravention of the specifications.
736 PH/48 When a host name was looked up from an IP address, and the subsequent
737 forward lookup of the name timed out, the host name was left in
738 $sender_host_name, contrary to the specification.
740 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
741 restricted to single-key lookups, Exim was not diagnosing an error if
742 * or *@ was used with a query-style lookup.
744 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
746 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
747 long ago, but noone interested enough thought of it. Let's just say that
748 the "1.1" means that there are some new functions that weren't there at
749 some point in the past.
751 PH/51 Error processing for expansion failure of helo_data from an smtp
752 transport during callout processing was broken.
754 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
755 tested/used via the -bh/-bhc/-bs options.
757 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
758 bug, fixed in subsequent PCRE releases).
760 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
761 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
763 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
769 SC/01 Use a glob alias rather than an array ref in eximstats generated
770 parser. This improves both readability and performance.
772 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
773 Don't display local sender or destination tables in eximstats unless
774 there is data to show.
775 Added average volumes into the eximstats top table text output.
777 SC/03 Collect data on the number of addresses (recipients) as well
778 as the number of messages in eximstats.
780 TF/01 Correct an error in the documentation for the redirect router. Exim
781 does (usually) call initgroups() when daemonizing.
783 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
784 with consistent privilege compared to when running as a daemon.
786 TF/03 Note in the spec that $authenticated_id is not set for local
787 submissions from trusted users.
789 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
790 Thanks to Dean Brooks <dean@iglou.com> for the patch.
792 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
793 by adding some example configuration directives to the default
794 configuration file. A little bit of work is required to uncomment the
795 directives and define how usernames and passwords are checked, but
796 there is now a framework to start from.
798 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
799 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
800 without this. I don't know how relevant this is to other LDAP libraries.
802 PH/02 Add the verb name to the "unknown ACL verb" error.
804 PH/03 Magnus Holmgren's patch for filter_prepend_home.
806 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
808 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
809 directory not expanded when it should be if an expanded home directory
810 was set for the address (which is overridden by the transport).
812 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
815 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
816 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
817 because it is too late at that time, and has no effect.
819 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
820 security issue with \' (bugzilla #107). I could not use the
821 PQescapeStringConn() function, because it needs a PGconn value as one of
824 PH/08 When testing addresses using -bt, indicate those final addresses that
825 are duplicates that would not cause an additional delivery. At least one
826 person was confused, thinking that -bt output corresponded to deliveries.
827 (Suppressing duplicates isn't a good idea as you lose the information
828 about possibly different redirections that led to the duplicates.)
830 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
831 systems where poll() doesn't work, in particular OS X.
833 PH/10 Added more information to debugging output for retry time not reached.
835 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
836 operations in malware.c.
838 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
841 PH/13 If write_rejectlog was set false when logging was sent to syslog with
842 syslog_duplication set false, log lines that would normally be written
843 both the the main log and to the reject log were not written to syslog at
846 PH/14 In the default configuration, change the use of "message" in ACL warn
847 statements to "add_header".
849 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
850 not followed by a command (e.g. "seen endif").
852 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
853 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
856 PH/17 Added extra conditions to the default value of delay_warning_condition
860 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
861 { match{$h_precedence:}{(?i)bulk|list|junk} } \
862 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
865 The Auto-Submitted: and various List- headers are standardised, whereas I
866 don't think Precedence: ever was.
868 PH/18 Refactored debugging code in route_finduser() to show more information,
869 in particular, the error code if getpwnam() issues one.
871 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
872 This is apparently needed in addition to the PH/07 change above to avoid
873 any possible encoding problems.
875 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
876 but not after initializing Perl.
878 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
879 output them only if debugging. By default they are written stderr,
880 apparently, which is not desirable.
882 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
885 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
888 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
890 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
891 authenticated or an ident call has been made. Suppress the default
892 values for $authenticated_id and $authenticated_sender (but permit -oMai
893 and -oMas) when testing with -bh.
895 PH/24 Re-jigged the order of the tests in the default configuration so that the
896 tests for valid domains and recipients precede the DNS black list and CSA
897 tests, on the grounds that those ones are more expensive.
899 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
900 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
901 This bug exists in every version of Exim that I still have, right back to
904 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
905 However, an attempt to turn on case-sensitivity in a regex key by
906 including (?-i) didn't work because the subject string was already
907 lowercased, and the effects were non-intuitive. It turns out that a
908 one-line patch can be used to allow (?-i) to work as expected.
914 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
915 other effects) broke the use of negated acl sub-conditions.
917 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
920 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
921 "Deny" causes Exim to reject the incoming connection with a 554 error.
922 Unfortunately, if there is a major crisis, such as a disk failure,
923 tcp-wrappers gives "deny", whereas what one would like would be some
924 kind of temporary error. A kludge has been added to help with this.
925 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
926 554 error is used if errno is still zero or contains ENOENT (which occurs
927 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
930 PH/03 Add -lutil to the default FreeBSD LIBS setting.
932 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
933 errors. Otherwise a message that provokes a temporary error (when other
934 messages do not) can cause a whole host to time out.
936 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
937 addresses were routed directly to files or pipes from a redirect router.
938 File deliveries just didn't batch; pipe deliveries might have suffered
941 PH/06 A failure to get a lock for a hints database would erroneously always say
942 "Failed to get write lock", even when it was really a read lock.
944 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
945 of 0600. This has been changed to use the value of the lockfile_mode
946 option (which defaults to 0600).
948 PH/08 Applied small patch from the Sieve maintainer.
950 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
951 folder from quota calculations, a direct delivery into this folder messed
952 up the contents of the maildirsize file. This was because the regex was
953 used only to exclude .Trash (or whatever) when the size of the mailbox
954 was calculated. There was no check that a delivery was happening into an
955 excluded directory. This bug has been fixed by ignoring all quota
956 processing for deliveries into excluded directories.
958 PH/10 Added the maildirfolder_create_regex option to appendfile.
964 PH/01 The code for finding all the local interface addresses on a FreeBSD
965 system running IPv6 was broken. This may well have applied to all BSD
966 systems, as well as to others that have similar system calls. The broken
967 code found IPv4 interfaces correctly, but gave incorrect values for the
968 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
969 that it would not match correctly against @[] and not recognize the IPv6
972 PH/02 The ipliteral router was not recognizing addresses of the form user@
973 [ipv6:....] because it didn't know about the "ipv6:" prefix.
975 PH/03 Added disable_ipv6.
977 PH/04 Changed $reply_address to use the raw form of the headers instead of the
978 decoded form, because it is most often used to construct To: headers
979 lines in autoreplies, and the decoded form may well be syntactically
980 invalid. However, $reply_address has leading white space removed, and all
981 newlines turned into spaces so that the autoreply transport does not
984 PH/05 If group was specified without a user on a router, and no group or user
985 was specified on a transport, the group from the router was ignored.
987 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
988 for visible compile-time settings that can be used to change these
989 numbers, for those that want even more. Backwards compatibility with old
990 spool files has been maintained. However, going back to a previous Exim
991 release will lost any variables that are in spool files.
993 PH/07 Two small changes when running in the test harness: increase delay when
994 passing a TCP/IP connection to a new process, in case the original
995 process has to generate a bounce, and remove special handling of
996 127.0.0.2 (sic), which is no longer necessary.
998 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
999 be the same on different OS.
1001 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1004 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1005 whether --show-vars was specified or not
1007 JJ/02 exipick: Added support for new ACL variable spool format introduced
1010 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1011 syntactically invalid From: or Reply-to: line, and a filter used this to
1012 generate an autoreply, and therefore failed to obtain an address for the
1013 autoreply, Exim could try to deliver to a non-existent relative file
1014 name, causing unrelated and misleading errors. What now happens is that
1015 it logs this as a hard delivery error, but does not attempt to create a
1018 PH/11 The exinext utility has a -C option for testing purposes, but although
1019 the given file was scanned by exinext itself; it wasn't being passed on
1020 when Exim was called.
1022 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1023 an end-of-file indication when reading a command response.
1025 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1026 compiled. In many other places in Exim, IPv6 addresses are always
1027 recognized, so I have changed this. It also means that IPv4 domain
1028 literals of the form [IPV4:n.n.n.n] are now always recognized.
1030 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1031 used if the router is not running as root, for example, when verifying at
1032 ACL time, or when using -bh. The debugging output from this situation was
1033 non-existent - all you got was a failure to exec. I have made two
1036 (a) Failures to set uid/gid, the current directory, or a process leader
1037 in a subprocess such as that created by queryprogram now generate
1038 suitable debugging ouput when -d is set.
1040 (b) The queryprogram router detects when it is not running as root,
1041 outputs suitable debugging information if -d is set, and then runs
1042 the subprocess without attempting to change uid/gid.
1044 PH/15 Minor change to Makefile for building test_host (undocumented testing
1047 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1048 additional section of a DNS packet that returns MX or SRV records.
1049 Instead, it always explicitly searches for A/AAAA records. This avoids
1050 major problems that occur when a DNS server includes only records of one
1051 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1052 fixed another bug: if SRV records were looked up and the corresponding
1053 address records were *not* found in the additional section, the port
1054 values from the SRV records were lost.
1056 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1057 using the correct key (the original address) when searching the retry
1058 rules in order to find which one to use for generating the retry hint.
1060 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1061 adding the default one. Similarly, if it contains a Reply-To: header, the
1062 errors_reply_to option, if set, is not used.
1064 PH/19 When calculating a retry time, Exim used to measure the "time since
1065 failure" by looking at the "first failed" field in the retry record. Now
1066 it does not use this if it is later than than the arrival time of the
1067 message. Instead it uses the arrival time. This makes for better
1068 behaviour in cases where some deliveries succeed, thus re-setting the
1069 "first failed" field. An example is a quota failure for a huge message
1070 when small messages continue to be delivered. Without this change, the
1071 "time since failure" will always be short, possible causing more frequent
1072 delivery attempts for the huge message than are intended.
1073 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1075 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1076 $1, $2, $3) because the numerical variables can be reset during some
1077 expansion items (e.g. "match"), thereby losing the authentication data.
1079 PH/21 Make -bV show the size of off_t variables so that the test suite can
1080 decide whether to run tests for quotas > 2G.
1082 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1083 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1084 filecount value is greater than 2G or if a quota value is greater than 2G
1085 on a system where the size of off_t is not greater than 4, a panic error
1088 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1089 never match. The debug and -bh output now contains an explicit error
1090 message indicating a malformed IPv4 address or mask.
1092 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1093 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1094 PH/23 above applies.
1096 PH/25 Do not write to syslog when running in the test harness. The only
1097 occasion when this arises is a failure to open the main or panic logs
1098 (for which there is an explicit test).
1100 PH/26 Added the /no_tell option to "control=freeze".
1102 PH/27 If a host name lookup failed very early in a connection, for example, if
1103 the IP address matched host_lookup and the reverse lookup yielded a name
1104 that did not have a forward lookup, an error message of the form "no IP
1105 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1106 could be logged. Now it outputs the IP address instead of "NULL".
1108 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1109 allows the sender and the authenticated sender to be set when
1110 submitting a message from within Exim. Since child_open_exim() is
1111 documented for local_scan(), the new function should be too.
1113 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1114 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1115 results in an empty string is now treated as unset.
1117 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1119 PH/31 Added sender_verify_fail logging option.
1121 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1122 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1123 tidied the source and removed it altogether.
1125 PH/33 When a queue run was abandoned because the load average was too high, a
1126 log line was always written; now it is written only if the queue_run log
1127 selector is set. In addition, the log line for abandonment now contains
1128 information about the queue run such as the pid. This is always present
1129 in "start" and "stop" lines but was omitted from the "abandon" line.
1131 PH/34 Omit spaces between a header name and the colon in the error message that
1132 is given when verify = headers_syntax fails (if there are lots of them,
1133 the message gets confusing).
1135 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1136 names, as there are now some PTR records that contain slashes. This check
1137 is only to protect against broken name servers that fall over on strange
1138 characters, so the fact that it applies to all lookups doesn't matter.
1140 PH/36 Now that the new test suite is complete, we can remove some of the
1141 special code in Exim that was needed for the old test suite. For example,
1142 sorting DNS records because real resolvers return them in an arbitrary
1143 order. The new test suite's fake resolver always returns records in the
1146 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1147 bounces) except when queue_only is set, to avoid logging races between
1148 the different processes.
1150 PH/38 Panic-die if .include specifies a non-absolute path.
1152 PH/39 A tweak to the "H" retry rule from its user.
1154 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1155 a label. They prevented compilation on older perls.
1157 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1158 a warning to be raised on newish perls.
1160 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1161 on queue. Changes to match documented behaviour of showing count of
1162 messages matching specified criteria.
1164 PH/40 Changed the default ident timeout from 30s to 5s.
1166 PH/41 Added support for the use of login_cap features, on those BSD systems
1167 that have them, for controlling the resources used by pipe deliveries.
1169 PH/42 The content-scanning code uses fopen() to create files in which to put
1170 message data. Previously it was not paying any attention to the mode of
1171 the files. Exim runs with umask(0) because the rest of the code creates
1172 files with open(), and sets the required mode explicitly. Thus, these
1173 files were ending up world-writeable. This was not a big issue, because,
1174 being within the spool directory, they were not world-accessible. I have
1175 created a function called modefopen, which takes an additional mode
1176 argument. It sets umask(777), creates the file, chmods it to the required
1177 mode, then resets the umask. All the relevant calls to fopen() in the
1178 content scanning code have been changed to use this function.
1180 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1181 to 24 hours. This avoids potential overflow problems when processing G
1182 and H retry rules. I suspect nobody ever tinkers with this value.
1184 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1186 PH/45 When the plaintext authenticator is running as a client, the server's
1187 challenges are checked to ensure they are valid base64 strings. By
1188 default, the authentication attempt is cancelled if an invalid string is
1189 received. Setting client_ignore_invalid_base64 true ignores these errors.
1190 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1191 they are received. Thus, the responses can be made to depend on the
1192 challenges. If an invalid string is ignored, an empty string is placed in
1195 PH/46 Messages that are created by the autoreply transport now contains a
1196 References: header, in accordance with RFCs 2822 and 3834.
1198 PH/47 Added authenticated_sender_force to the smtp transport.
1200 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1202 PH/49 Installed latest patch from the Sieve maintainer.
1204 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1205 was also set, the appendfile transport was unnecessarily scanning a
1206 directory of message files (e.g. for maildir delivery) to find the count
1207 of files (along with the size), even though it did not need this
1208 information. It now does the scan only if it needs to find either the
1209 size of the count of files.
1211 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1213 PH/52 Two bugs concerned with error handling when the smtp transport is
1216 (i) Exim was not creating retry information for temporary errors given
1217 for individual recipients after the DATA command when the smtp transport
1218 was used in LMTP mode. This meant that they could be retried too
1219 frequently, and not timed out correctly.
1221 (ii) Exim was setting the flag that allows error details to be returned
1222 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1223 recipients that were returned after the DATA command.
1225 PH/53 This is related to PH/52, but is more general: for any failing address,
1226 when detailed error information was permitted to be returned to the
1227 sender, but the error was temporary, then after the final timeout, only
1228 "retry timeout exceeded" was returned. Now it returns the full error as
1229 well as "retry timeout exceeded".
1231 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1232 do this, and (what is worse) MTAs that accept it.
1234 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1235 will now be deprecated.
1237 PH/56 New os.c-cygwin from the Cygwin maintainer.
1239 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1240 formats (previously only available in exim formats via -bpr, -bpru,
1241 and -bpra. Now also available in native and exiqgrep formats)
1243 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1244 with very large, slow to parse queues
1246 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1248 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1250 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1251 responses to authentication challenges, though it was showing the
1252 challenges; (ii) I've removed the CR characters from the debug output for
1255 PH/58 Allow for the insertion of a newline as well as a space when a string
1256 is turned into more than one encoded-word during RFC 2047 encoding. The
1257 Sieve code now uses this.
1259 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1260 data_4xx, lost_connection, tls_required.
1262 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1263 message was being sent as an SMTP response.
1265 PH/61 Add -l and -k options to exicyclog.
1267 PH/62 When verifying, if an address was redirected to one new address, so that
1268 verification continued, and the new address failed or deferred after
1269 having set something in $address_data, the value of $address_data was not
1270 passed back to the ACL. This was different to the case when no
1271 redirection occurred. The value is now passed back in both cases.
1273 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1274 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1275 use login_cap.h, so on its own it isn't the distinguishing feature. The
1276 new name refers directly to the setclassresources() function.
1278 PH/65 Added configuration files for NetBSD3.
1280 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1282 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1283 is preferred over IPv4.
1285 PH/68 The bounce_return_message and bounce_return_body options were not being
1286 honoured for bounces generated during the reception of non-SMTP messages.
1287 In particular, this applied to messages rejected by the ACL. This bug has
1288 been fixed. However, if bounce_return_message is true and bounce_return_
1289 body is false, the headers that are returned for a non-SMTP message
1290 include only those that have been read before the error was detected.
1291 (In the case of an ACL rejection, they have all been read.)
1293 PH/69 The HTML version of the specification is now built in a directory called
1294 spec_html instead of spec.html, because the latter looks like a path with
1295 a MIME-type, and this confuses some software.
1297 PH/70 Catch two compiler warnings in sieve.c.
1299 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1300 function verify_get_ident() calls ip_connect() to connect a socket, but
1301 if the "connect()" function timed out, ip_connect() used to close the
1302 socket. However, verify_get_ident() also closes the socket later, and in
1303 between Exim writes to the log, which may get opened at this point. When
1304 the socket was closed in ip_connect(), the log could get the same file
1305 descriptor number as the socket. This naturally causes chaos. The fix is
1306 not to close the socket in ip_connect(); the socket should be closed by
1307 the function that creates it. There was only one place in the code where
1308 this was missing, in the iplookup router, which I don't think anybody now
1309 uses, but I've fixed it anyway.
1311 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1312 well as to direct DNS lookups. Otherwise the handling of names in host
1313 lists is inconsistent and therefore confusing.
1319 PH/01 Two changes to the default runtime configuration:
1321 (1) Move the checks for relay_from_hosts and authenticated clients from
1322 after to before the (commented out) DNS black list checks.
1324 (2) Add control=submission to the relay_from_hosts and authenticated
1325 clients checks, on the grounds that messages accepted by these
1326 statements are most likely to be submissions.
1328 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1330 (1) Generate an error if the third argument for the ${prvs expansion is
1333 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1336 (3) Reset the variables that are obtained from the first argument of
1337 ${prvscheck and used in the second argument before leaving the code,
1338 because their memory is reclaimed, so using them afterwards may do
1341 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1342 one (it's much easier than Tom thought :-).
1344 (5) Because of (4), we can now allow for the use of $prvscheck_result
1345 inside the third argument.
1347 PH/03 For some reason, the default setting of PATH when running a command from
1348 a pipe transport was just "/usr/bin". I have changed it to
1351 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1352 anything to be listed in the output from -bV.
1354 PH/05 When a filter generated an autoreply, the entire To: header line was
1355 quoted in the delivery log line, like this:
1357 => >A.N.Other <ano@some.domain> <original@ddress> ...
1359 This has been changed so that it extracts the operative address. There
1360 may be more than one such address. If so, they are comma-separated, like
1363 => >ano@some.domain,ona@other.domain <original@ddress> ...
1365 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1366 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1367 not being looked up in the rDNS to get a host name, Exim was showing the
1368 IP address twice in Received: lines, even though the IP addresses were
1369 identical. For example:
1371 Received: from [1.2.3.4] (helo=[1.2.3.4])
1373 However, if the real host name was known, it was omitting the HELO data
1374 if it matched the actual IP address. This has been tidied up so that it
1375 doesn't show the same IP address twice.
1377 PH/07 When both +timestamp and +memory debugging was on, the value given by
1378 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1379 called by the debug printing, thereby overwriting the timestamp buffer.
1380 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1382 PH/08 When the original message was included in an autoreply transport, it
1383 always said "this is a copy of the message, including all the headers",
1384 even if body_only or headers_only was set. It now gives an appropriate
1387 PH/09 Applied a patch from the Sieve maintainer which:
1389 o fixes some comments
1390 o adds the (disabled) notify extension core
1391 o adds some debug output for the result of if/elsif tests
1392 o points to the current vacation draft in the documentation
1393 and documents the missing references header update
1397 o fixes a bug in processing the envelope test (when testing
1398 multiple envelope elements, the last element determinted the
1401 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1402 Electronic Mail") by including:
1404 Auto-submitted: auto-generated
1406 in the messages that it generates (bounce messages and others, such as
1407 warnings). In the case of bounce messages for non-SMTP mesages, there was
1408 also a typo: it was using "Auto_submitted" (underscore instead of
1409 hyphen). Since every message generated by Exim is necessarily in response
1410 to another message, thes have all been changed to:
1412 Auto-Submitted: auto-replied
1414 in accordance with these statements in the RFC:
1416 The auto-replied keyword:
1418 - SHOULD be used on messages sent in direct response to another
1419 message by an automatic process,
1421 - MUST NOT be used on manually-generated messages,
1423 - MAY be used on Delivery Status Notifications (DSNs) and Message
1424 Disposition Notifications (MDNs),
1426 - MUST NOT be used on messages generated by automatic or periodic
1427 processes, except for messages which are automatic responses to
1430 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1431 to the default Received: header definition.
1433 PH/12 Added log selector acl_warn_skipped (default on).
1435 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1436 variables because (a) they are in the wrong storage pool and (b) even if
1437 they were copied, it wouldn't work properly because of the caching.
1439 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1440 checking when decoding. Apparently there are clients that generate
1441 overlong encoded strings. Why am I not surprised?
1443 PH/15 If the first argument of "${if match_address" was not empty, but did not
1444 contain an "@" character, Exim crashed. Now it writes a panic log message
1445 and treats the condition as false.
1447 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1449 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1450 extension "envelope-auth". The code is finished and in agreement with
1451 other implementations, but there is no documentation so far and in fact,
1452 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1453 not changing the active code.
1455 Print executed "if" and "elsif" statements when debugging is used. This
1456 helps a great deal to understand what a filter does.
1458 Document more things not specified clearly in RFC3028. I had all this
1459 sorted out, when out of a sudden new issues came to my mind. Oops."
1461 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1464 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1465 canonical form (as documented). However, after a host name lookup from
1466 the IP address, check_host() was doing a simple string comparison with
1467 addresses acquired from the DNS when checking that the found name did
1468 have the original IP as one of its addresses. Since any found IPv6
1469 addresses are likely to be in abbreviated form, the comparison could
1470 fail. Luckily, there already exists a function for doing the comparison
1471 by converting both addresses to binary, so now that is used instead of
1472 the text comparison.
1474 PH/20 There was another similar case to PH/19, when a complete host name was
1475 given in a host list; looking up its IP address could give an abbreviated
1476 form, whereas the current host's name might or might not be abbreviated.
1477 The same fix has been applied.
1483 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1484 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1487 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1488 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1490 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1492 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1493 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1494 Also, for "Auto-Submitted", treat anything other than "no" as
1495 non-personal, in accordance with RFC 3834. (Previously it treated
1496 anything starting "auto-" as non-personal.)
1498 TF/01 The control=submission/name=... option had a problem with syntax
1499 errors if the name included a slash character. The /name= option
1500 now slurps the rest of the string, so it can include any characters
1501 but it must come last in the list of options (after /sender_retain
1504 PH/05 Some modifications to the interface to the fake nameserver for the new
1512 TK/01 Added the "success_on_redirect" address verification option. See
1513 NewStuff for rationale and an example.
1515 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1517 PH/02 Patch to exigrep to allow it to work on syslog lines.
1519 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1520 fread() to skip over the body file's header line, because in Cygwin the
1521 header line is locked and is inaccessible.
1523 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1524 co-exist for some time) to make it clear that it is the Exim ID that is
1525 referenced, not the Message-ID: header line.
1527 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1528 string_format() function, because snprintf() does not exist on all
1531 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1532 ${stat: expansion item.
1534 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1535 protocol synchronization error", to keep the pedants happy.
1537 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1538 well as for IRIX systems, when gcc is being used. See the host.c source
1541 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1543 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1546 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1547 transport and to the smtp transport in LMTP mode.
1549 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1551 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1552 run a filter in a subprocess. This could lead to confusion in subsequent
1553 lookups in the parent process. There should also be a search_tidyup() at
1554 the end of the subprocess.
1556 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1557 only if the host matched helo_try_verify_hosts, which caused the
1558 verification to occur when the EHLO/HELO command was issued. The ACL just
1559 tested the remembered result. Now, if a previous verification attempt has
1560 not happened, "verify = helo" does it there and then.
1562 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1564 TK/03 Fix log output including CR from clamd.
1566 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1567 exist provoked a memory error which could cause a segfault.
1569 PH/15 Installed PCRE 6.2
1571 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1573 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1574 of the problem. Specifically, suggested +O2 rather than +O1 for the
1577 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1579 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1580 record, the port was not correctly logged when the outgoing_port log
1581 selector was set (it logged the transort's default port).
1583 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1584 fallback_hosts, and "hosts" in the smtp transport.
1586 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1587 host errors such as "Connection refused".
1589 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1590 authentication with radiusclient 0.4.9:
1592 - Error returned from rc_read_config was caught wrongly
1593 - Username/password not passed on to radius server due to wrong length.
1595 The presumption is that some radiusclient API changes for 4.51/PH/17
1596 were not taken care of correctly. The code is still untested by me (my
1597 Linux distribution still has 0.3.2 of radiusclient), but it was
1598 contributed by a Radius user.
1600 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1601 expanding the "port" option of the smtp transport.
1603 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1604 while reading a MIME header. Thanks to Tom Hughes for a patch.
1606 PH/24 Include config.h inside local_scan.h so that configuration settings are
1609 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1610 that in an ACL for RCPT (for example), you can examine exactly what was
1613 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1614 commands, but it was not correctly comparing the address with the actual
1615 client host address. Thus, it would show the EHLO address in Received:
1616 header lines when this was not necessary.
1618 PH/27 Added the % operator to ${eval:}.
1620 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1621 it should be ignoring failures (because with -C, for example, it has lost
1622 privilege). It wasn't ignoring creation failures other than "already
1625 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1628 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1629 because an input line was too long, either on its own, or by virtue of
1630 too many continuations, the temporary file was not being removed, and the
1631 return code was incorrect.
1633 PH/31 Missing "BOOL" in function definition in filtertest.c.
1635 PH/32 Applied Sieve patches from the maintainer.
1637 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1639 PH/33 Added "verify = not_blind".
1641 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1642 Local/Makefile (with some defaults set). These are used in built scripts
1643 such as exicyclog, but they have never been used in the exim_install
1644 script (though there are many overriding facilities there). I have
1645 arranged that the exim_install script now takes note of these two
1648 PH/35 Installed configuration files for Dragonfly.
1650 PH/36 When a locally submitted message by a trusted user did not contain a
1651 From: header, and the sender address was obtained from -f or from an SMTP
1652 MAIL command, and the trusted user did not use -F to supply a sender
1653 name, $originator_name was incorrectly used when constructing a From:
1654 header. Furthermore, $originator_name was used for submission mode
1655 messages from external hosts without From: headers in a similar way,
1656 which is clearly wrong.
1658 PH/37 Added control=suppress_local_fixups.
1660 PH/38 When log_selector = +received_sender was set, and the addition of the
1661 sender made the log line's construction buffer exactly full, or one byte
1662 less than full, an overflow happened when the terminating "\n" was
1665 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1666 when the result of a list match is failure because a DNS lookup failed.
1668 PH/40 RM_COMMAND is now used in the building process.
1670 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1671 the "build-* directories that it finds.
1673 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1674 address in a domain literal was a prefix of an interface address.
1676 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1677 when verifying a sender address, unless rewrite_headers is false.
1679 PH/44 Wrote a long comment about why errors_to addresses are verified as
1680 recipients, not senders.
1682 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1683 the ratelimit ACL was added.
1685 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1687 PH/46 Added extra information about PostgreSQL errors to the error string.
1689 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1690 avoiding the need to install special zones in a real server. This is
1691 backwards compatible; if it can't find the fake resolver, it drops back.
1692 Thus, both old and new test suites can be run.
1694 TF/02 Added util/ratelimit.pl
1696 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1697 clock is set back in time.
1699 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1700 Candler <B.Candler@pobox.com>.
1702 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1703 OK for addresses that are the result of redirections.
1705 PH/48 A number of further additions for the benefit of the new test suite,
1706 including a fake gethostbyname() that interfaces to the fake DNS resolver
1709 TF/06 The fix for widen_domains has also been applied to qualify_single and
1710 search_parents which are the other dnslookup options that can cause
1713 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1716 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1718 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1719 service" if it encountered an MX record with an empty target hostname.
1720 The message is now "an MX or SRV record indicated no SMTP service".
1722 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1723 if the DNS of the sending site is misconfigured. This is quite a
1724 common situation. This change restores the behaviour of treating a
1725 helo verification defer as a failure.
1727 PH/51 If self=fail was set on a router, the bounce message did not include the
1728 actual error message.
1734 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1736 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1737 command itself ended in error, the underlying message about the transport
1738 filter timeout was being overwritten with the pipe command error. Now the
1739 underlying error message should be appended to the second error message.
1741 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1743 PH/02 Reduce the amount of output that "make" produces by default. Full output
1744 can still be requested.
1746 PH/03 The warning log line about a condition test deferring for a "warn" verb
1747 was being output only once per connection, rather than after each
1748 occurrence (because it was using the same function as for successful
1749 "warn" verbs). This seems wrong, so I have changed it.
1751 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1752 it should not have, which might have caused a crash in the right
1753 circumstances, but probably never did.
1755 PH/04 Installed a modified version of Tony Finch's patch to make submission
1756 mode fix the return path as well as the Sender: header line, and to
1757 add a /name= option so that you can make the user's friendly name appear
1760 TF/03 Added the control = fakedefer ACL modifier.
1762 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1763 Mark Lowes for thorough testing.
1765 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1767 TK/03 Merged latest SRS patch from Miles Wilton.
1769 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1770 with the definition in sysexits.h (which is #included earlier).
1771 Fortunately, Exim does not actually use EX_OK. The code used to try to
1772 preserve the sysexits.h value, by assumimg that macro definitions were
1773 scanned for macro replacements. I have been disabused of this notion,
1774 so now the code just undefines EX_OK before #including unistd.h.
1776 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1777 in the smtp transport. When a block could not be written in a single
1778 write() function, the timeout was being re-applied to each part-write.
1779 This seems wrong - if the receiver was accepting one byte at a time it
1780 would take for ever. The timeout is now adjusted when this happens. It
1781 doesn't have to be particularly precise.
1783 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1784 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1786 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1787 without a domain if the check to <postmaster@domain> fails.
1789 SC/01 Eximstats: added -xls and the ability to specify output files
1790 (patch written by Frank Heydlauf).
1792 SC/02 Eximstats: use FileHandles for outputing results.
1794 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1796 SC/04 Eximstats: fixed display of large numbers with -nvr option
1798 SC/05 Eximstats: fixed merging of reports with empty tables.
1800 SC/06 Eximstats: added the -include_original_destination flag
1802 SC/07 Eximstats: removed tabs and trailing whitespace.
1804 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1806 TK/06 MBOX spool code: Add real "From " MBOX separator line
1807 so the .eml file is really in mbox format (even though
1808 most programs do not really care). Patch from Alex Miller.
1810 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1811 The latter is generated from $received_to and is only set if the
1812 message has one envelope recipient. SA can use these headers,
1813 obviously out-of-the-box. Patch from Alex Miller.
1815 PH/08 The ${def test on a variable was returning false if the variable's
1816 value was "0", contrary to what the specification has always said!
1817 The result should be true unless the variable is empty.
1819 PH/09 The syntax error of a character other than { following "${if
1820 def:variable_name" (after optional whitespace) was not being diagnosed.
1821 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1822 accidental colon was present, for example, could give incorrect results.
1824 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1825 result is used (not including appendfile, where other changes are about
1828 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1829 This involved changing a lot of size variables from int to off_t. It
1830 should work with maildirs and everything.
1832 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1833 spamd dying while we are connected to it.
1835 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1838 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1839 function for BDB 4.3.
1841 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1843 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1844 the sources for PCRE have been re-arranged and more files are now
1847 PH/15 The code I had for printing potentially long long variables in PH/11
1848 above was not the best (it lost precision). The length of off_t variables
1849 is now inspected at build time, and an appropriate printing format (%ld
1850 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1851 to be "long long int" or "long int". This is needed for the internal
1852 formatting function string_vformat().
1854 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1855 the configuration file to be ":syslog", then the script "guesses" where
1856 the logs files are, rather than using the compiled in default. In our
1857 case the guess is not the same as the compiled default, so the script
1858 suddenly stopped working when I started to use syslog. The patch checks
1859 to see if log_file_path is "". If so, it attempts to read it from exim
1860 with no configuration file to get the compiled in version, before it
1861 falls back to the previous guessing code."
1863 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1864 implementing BATV in an Exim configuration. See NewStuff for the gory
1867 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1868 Makefile that are specific to HP-UX.
1870 PH/18 If the "use_postmaster" option was set for a recipient callout together
1871 with the "random" option, the postmaster address was used as the MAIL
1872 FROM address for the random test, but not for the subsequent recipient
1873 test. It is now used for both.
1875 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1876 patch removes a few documentation additions to RFC 3028, because the
1877 latest draft now contains them. It adds the new en;ascii-case comparator
1878 and a new error check for 8bit text in MIME parts. Comparator and
1879 require names are now matched exactly. I enabled the subaddress
1880 extension, but it is not well tested yet (read: it works for me)."
1882 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1883 rework some of the code of TK/09 above to avoid the hardwired use of
1884 "%lld" and "long long". Replaced the call to snprintf() with a call to
1887 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1888 records point to non-existent hosts", "retry timeout exceeded", and
1889 "retry time not reached for any host after a long failure period".
1891 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1892 experimental DomainKeys support:
1894 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1895 (2) On an error such as an illegally used "control", the wrong name for
1896 the control was given.
1898 These problems did NOT occur unless DomainKeys support was compiled.
1900 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1902 PH/24 Added ${if match_ip condition.
1904 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1905 databases so that it will be absolutely obvious if a crash occurs in the
1906 DB library. This is a regular occurrence (often caused by mis-matched
1909 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1910 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1911 picked up on a user's system that detects such things. There doesn't seem
1912 to be a gcc warning option for this - only an attribute that has to be
1913 put on the function's prototype. It seems that in Fedora Core 4 they have
1914 set this on a number of new functions. No doubt there will be more in due
1917 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1918 specify a transport. However, if an address that was verified by such a
1919 router was the subject of a callout, Exim crashed because it tried to
1920 read the rcpt_include_affixes from the non-existent transport. Now it
1921 just assumes that the setting of that option is false. This bug was
1922 introduced by 4.51/PH/31.
1924 PH/28 Changed -d+all to exclude +memory, because that information is very
1925 rarely of interest, but it makes the output a lot bigger. People tend to
1926 do -d+all out of habit.
1928 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1929 code in os-type was giving problems when libc.so lives in lib64, like on
1932 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1933 aren't the modern standard, and it seems that some systems' include files
1934 don't always have them. Exim was already checking for some of the newer
1935 ones like T_AAAA, and defining it itself. I've added checks for all the
1936 record types that Exim uses.
1938 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1939 not automatically generating a new one, as it is supposed to. This
1940 prevented TLS from working. If the file did exist, but contained invalid
1941 data, a new version was generated, as expected. It was only the case of a
1942 non-existent file that was broken.
1944 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1945 with a change in libdomainkeys > 0.64.
1947 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1948 from DNS. If the selector record carries the flag, it now has
1949 precedence over the domain-wide flag.
1951 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1953 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1954 the use of a port name that isn't defined in /etc/services) occurred, the
1955 message was deferred as in a normal delivery, and thus remained on the
1956 spool, instead of being failed because of the mua_wrapper setting. This
1957 is now fixed, and I tidied up some of the mua_wrapper messages at the
1960 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1961 the messages in a hash of arrays rather than using individual hashes.
1962 This is a bit cleaner and results in dramatic memory savings, albeit
1963 at a slight CPU cost.
1965 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1966 as requested by Marc Sherman.
1968 SC/10 Eximstats: added histograms for user specified patterns as requested
1971 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1973 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1974 fopen() in the content-scanning modules that did not already have it.
1980 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1981 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1983 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1985 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1987 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1988 to test Sieve filters that use "vacation".
1990 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1991 that changes the way the GnuTLS parameters are stored in the cache file.
1992 The new format can be generated externally. For backward compatibility,
1993 if the data in the cache doesn't make sense, Exim assumes it has read an
1994 old-format file, and it generates new data and writes a new file. This
1995 means that you can't go back to an older release without removing the
1998 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1999 work if there are any delivery delays because "one_time" forces the
2000 parent to be marked "delivered", so its unseen clone is never tried
2001 again. For this reason, Exim now forbids the simultaneous setting of
2004 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2005 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2006 entry if you want to know the details. The fix, however, neglected to
2007 consider the case when local delivery batching is involved. The test for
2008 "previously delivered" was not happening when checking to see if an
2009 address could be batched with a previous (undelivered) one; under
2010 certain circumstances this could lead to multiple deliveries to the same
2013 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2014 in its include files, and this causes problems building Exim.
2016 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2017 header_syntax) but Exim was just ignoring anything given after a slash.
2018 In particular, this caused confusion with an attempt to use "verify =
2019 reverse_host_lookup/defer_ok". An error is now given when options are
2020 supplied for verify items that do not have them. (Maybe reverse_host_
2021 lookup should have a defer_ok option, but that's a different point.)
2023 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2024 defined by RFC 821) to 2048, because there were problems with some AUTH
2025 commands, and RFC 1869 says the size should be increased for extended
2026 SMTP commands that take arguments.
2028 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2031 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2032 "unknown" error; now it says that the functionality isn't in the binary.
2034 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2035 an address' error message when a string expansion fails (syntax or
2036 whatever). Otherwise the password may appear in the log. Following change
2037 PH/42 below, there is no longer a chance of it appearing in a bounce
2040 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2042 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2043 of its addresses was ever tried. (Bugzilla bug #2.)
2045 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2046 the result incorrectly in the debug output. (It correctly added a newline
2047 to what was transported.)
2049 TF/01 Added $received_time.
2051 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2052 commented out examples of how to interface to a virus scanner and to
2053 SpamAssassin. Also added commented examples of av_scanner and
2054 spamd_address settings.
2056 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2057 and controls are allowed in which ACLs. There were a couple of minor
2058 errors. Some of the entries in the conditions table (which is a table of
2059 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2060 negation of where the condition IS allowed.
2062 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2064 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2065 header file does not have a version number, so I've had to invent a new
2066 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2067 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2068 radiusclient), but it was contributed by a Radius user.
2070 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2071 files or directories, for OpenSSL.
2073 PH/19 When an Exim process that is running as root has to create an Exim log
2074 file, it does so in a subprocess that runs as exim:exim so as to get the
2075 ownership right at creation (otherwise, other Exim processes might see
2076 the file with the wrong ownership). There was no test for failure of this
2077 fork() call, which would lead to the process getting stuck as it waited
2078 for a non-existent subprocess. Forks do occasionally fail when resources
2079 run out. I reviewed all the other calls to fork(); they all seem to check
2082 PH/20 When checking for unexpected SMTP input at connect time (before writing
2083 the banner), Exim was not dealing correctly with a non-positive return
2084 from the read() function. If the client had disconnected by this time,
2085 the result was a log entry for a synchronization error with an empty
2086 string after "input=" when read() returned zero. If read() returned -1
2087 (an event I could not check), uninitialized data bytes were printed.
2088 There were reports of junk text (parts of files, etc) appearing after
2091 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2093 PH/22 Added support for macro redefinition, and (re)definition in between
2094 driver and ACL definitions.
2096 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2097 forgetting to use the resulting value; it was using the unexpanded value.
2099 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2100 hadn't been configured. The fix is from Juergen Kreileder, who
2101 understands it better than I do:
2103 "Here's what I see happening with three configured cyrus_sasl
2104 authenticators configured (plain, login, cram-md5):
2106 On startup auth_cyrus_sasl_init() gets called for each of these.
2107 This means three calls to sasl_listmech() without a specified mech_list.
2108 => SASL tests which mechs of all available mechs actually work
2109 => three warnings about OTP not working
2110 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2112 With the patch, sasl_listmech() also gets called three times. But now
2113 SASL's mech_list option is set to the server_mech specified in the the
2114 authenticator. Or in other words, the answer from sasl_listmech()
2115 gets limited to just the mech you're testing for (which is different
2117 => the return list contains just 'plain' or 'login', 'cram-md5' or
2118 nothing depending on the value of ob->server_mech.
2120 I've just tested the patch: Authentication still works fine,
2121 unavailable mechs specified in the exim configuration are still
2122 caught, and the auth.log warnings about OTP are gone."
2124 PH/25 When debugging is enabled, the contents of the command line are added
2125 to the debugging output, even when log_selector=+arguments is not
2128 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2129 answer is "GNU", and only if the return is "GNU/something" is the answer
2132 PH/27 $acl_verify_message is now set immediately after the failure of a
2133 verification in an ACL, and so is available in subsequent modifiers. In
2134 particular, the message can be preserved by coding like this:
2136 warn !verify = sender
2137 set acl_m0 = $acl_verify_message
2139 Previously, $acl_verify_message was set only while expanding "message"
2140 and "log_message" when a very denied access.
2142 PH/28 Modified OS/os.c-Linux with
2144 -#ifndef OS_LOAD_AVERAGE
2145 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2147 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2148 nomenclature these days.)
2150 PH/29 Installed patch from the Sieve maintainer that adds the options
2151 sieve_useraddress and sieve_subaddress to the redirect router.
2153 PH/30 In these circumstances:
2154 . Two addresses routed to the same list of hosts;
2155 . First host does not offer TLS;
2156 . First host accepts first address;
2157 . First host gives temporary error to second address;
2158 . Second host offers TLS and a TLS session is established;
2159 . Second host accepts second address.
2160 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2161 and peerdn, if requested) that were in fact used only for the second
2164 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2165 attention to any local part prefix or suffix that was matched by the
2166 router that accepted the address. It now behaves in the same way as it
2167 does for delivery: the affixes are removed from the local part unless
2168 rcpt_include_affixes is set on the transport.
2170 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2171 timeout during the DATA phase of an incoming message.
2173 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2174 applied a patch sanctioned by the Sieve maintainer.
2176 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2177 the uid or gid is negative. A case of a negative gid caused this to be
2178 noticed. The fix allows for either to be negative.
2180 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2181 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2184 PH/36 The change PH/12 above was broken. Fixed it.
2186 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2187 the grounds that routing the same address twice would always produce the
2188 same answer. This might have been true once, but it is certainly no
2189 longer true now. Routing a child address may depend on the previous
2190 routing that produced that child. Some complicated redirection strategies
2191 went wrong when messages had multiple recipients, and made Exim's
2192 behaviour dependent on the order in which the addresses were given.
2194 I have moved the duplicate checking until after the routing is complete.
2195 Exim scans the addresses that are assigned to local and remote
2196 transports, and removes any duplicates. This means that more work will be
2197 done, as duplicates will always all be routed, but duplicates are
2198 presumably rare, so I don't expect this is of any significance.
2200 For deliveries to pipes, files, and autoreplies, the duplicate checking
2201 still happens during the routing process, since they are not going to be
2204 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2205 It corrects a timeout issue with spamd. This is Ian's comment: "The
2206 background is that sometimes spamd either never reads data from a
2207 connection it has accepted, or it never writes response data. The exiscan
2208 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2209 blindly assumes that writes won't block so it may never time out."
2211 PH/39 Allow G after quota size as well as K and M.
2213 PH/40 The value set for $authenticated_id in an authenticator may not contain
2214 binary zeroes or newlines because the value is written to log lines and
2215 to spool files. There was no check on this. Now the value is run through
2216 the string_printing() function so that such characters are converted to
2217 printable escape sequences.
2219 PH/41 $message_linecount is a new variable that contains the total number of
2220 lines in the message. Compare $body_linecount, which is the count for the
2223 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2224 bounce and delay warning messages, except in certain special cases, which
2227 (a) An SMTP error message from a remote host;
2228 (b) A message specified in a :fail: redirection;
2229 (c) A message specified in a "fail" command in a system filter;
2230 (d) A message specified in a FAIL return from the queryprogram router;
2231 (e) A message specified by the cannot_route_message router option.
2233 In these cases only, Exim does include the error details in bounce and
2234 warning messages. There are also a few cases where bland messages such
2235 as "unrouteable address" or "local delivery error" are given.
2237 PH/43 $value is now also set for the "else" part of a ${run expansion.
2239 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2240 being worked on, but at least Exim now implements the latest version to
2243 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2244 process to complete was treated as a delivery failure, a timeout while
2245 writing the message to the pipe was logged, but erroneously treated as a
2246 successful delivery. Such timeouts include transport filter timeouts. For
2247 consistency with the overall process timeout, these timeouts are now
2248 treated as errors, giving rise to delivery failures by default. However,
2249 there is now a new Boolean option for the pipe transport called
2250 timeout_defer, which, if set TRUE, converts the failures into defers for
2251 both kinds of timeout. A transport filter timeout is now identified in
2254 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2255 systems where "make" and "gmake" are different, calling "gmake" at top
2256 level broke things. I've arranged for the value of $(MAKE) to be passed
2257 from the Makefile to this script so that it can call the same version of
2261 A note about Exim versions 4.44 and 4.50
2262 ----------------------------------------
2264 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2265 changes of various kinds. As a consequence, a big documentation update was
2266 needed. This delayed the release for rather longer than seemed good, especially
2267 in the light of a couple of (minor) security issues. Therefore, the changes
2268 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2269 release. So 4.44 and 4.50 are in effect two different branches that both start
2272 I have left the 4.50 change log unchanged; it contains all the changes since
2273 4.43. The change log for 4.44 is below; many of its items are identical to
2274 those for 4.50. This seems to be the most sensible way to preserve the
2275 historical information.
2281 1. Minor wording change to the doc/README.SIEVE file.
2283 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2284 computation of the current number of files was incorrect.
2286 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2287 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2290 4. Give more explanation in the error message when the command for a transport
2291 filter fails to execute.
2293 5. There are several places where Exim runs a non-Exim command in a
2294 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2295 was being done only for the command run by the queryprogram router. It is
2296 now done for all such subprocesses. The other cases are: ${run, transport
2297 filters, and the commands run by the lmtp and pipe transports.
2299 6. Added CONFIGURE_GROUP build-time option.
2301 7. Some older OS have a limit of 256 on the maximum number of file
2302 descriptors. Exim was using setrlimit() to set 1000 as a large value
2303 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2304 systems. I've change it so that if it can't get 1000, it tries for 256.
2306 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2307 was an oversight, and furthermore, ever since the addition of extra
2308 controls (e.g. 4.43/32), the checks on when to allow different forms of
2309 "control" were broken. There should now be diagnostics for all cases when a
2310 control that does not make sense is encountered.
2312 9. Added the /retain_sender option to "control=submission".
2314 10. $recipients is now available in the predata ACL (oversight).
2316 11. Tidy the search cache before the fork to do a delivery from a message
2317 received from the command line. Otherwise the child will trigger a lookup
2318 failure and thereby defer the delivery if it tries to use (for example) a
2319 cached ldap connection that the parent has called unbind on.
2321 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2322 of $address_data from the recipient verification was clobbered by the
2323 sender verification.
2325 13. The value of address_data from a sender verification is now available in
2326 $sender_address_data in subsequent conditions in the ACL statement.
2328 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2330 15. Added a new option "connect=<time>" to callout options, to set a different
2333 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2334 was its contents. (It was OK if the option was not defined at all.)
2336 17. A "Completed" log line is now written for messages that are removed from
2337 the spool by the -Mrm option.
2339 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2340 information about exactly what failed.
2342 19. Added -dd to debug only the daemon process.
2344 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2345 handles timeouts, both on the server side and network timeouts. Renamed the
2346 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2348 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2349 It is now set to "smtps".
2351 22. $host_address is now set to the target address during the checking of
2352 ignore_target_hosts.
2354 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2355 being passed; this would have caused $sender_host_name to have been used if
2356 matching the list had actually called for a host name (not very likely,
2357 since this list is usually IP addresses). A host name is now passed as
2360 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2361 code that specifies a non-restarting handler (typically sigaction() in
2362 modern systems) in an attempt to fix a rare and obscure crash bug.
2364 25. Narrowed the window for a race in the daemon that could cause it to ignore
2365 SIGCHLD signals. This is not a major problem, because they are used only to
2366 wake it up if nothing else does.
2368 26. A malformed maildirsize file could cause Exim to calculate negative values
2369 for the mailbox size or file count. Odd effects could occur as a result.
2370 The maildirsize information is now recalculated if the size or filecount
2373 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2374 support for a long time. Removed HAVE_SYS_VFS_H.
2376 28. Installed the latest version of exipick from John Jetmore.
2378 29. In an address list, if the pattern was not a regular expression, an empty
2379 subject address (from a bounce message) matched only if the pattern was an
2380 empty string. Non-empty patterns were not even tested. This was the wrong
2381 because it is perfectly reasonable to use an empty address as part of a
2382 database query. An empty address is now tested by patterns that are
2383 lookups. However, all the other forms of pattern expect the subject to
2384 contain a local part and a domain, and therefore, for them, an empty
2385 address still always fails if the pattern is not itself empty.
2387 30. Exim went into a mad DNS loop when attempting to do a callout where the
2388 host was specified on an smtp transport, and looking it up yielded more
2389 than one IP address.
2391 31. Re-factored the code for checking spool and log partition space into a
2392 function that finds that data and another that does the check. The former
2393 is then used to implement four new variables: $spool_space, $log_space,
2394 $spool_inodes, and $log_inodes.
2396 32. The RFC2047 encoding function was originally intended for short strings
2397 such as real names; it was not keeping to the 75-character limit for
2398 encoded words that the RFC imposes. It now respects the limit, and
2399 generates multiple encoded words if necessary. To be on the safe side, I
2400 have increased the buffer size for the ${rfc2047: expansion operator from
2403 33. It is now permitted to omit both strings after an "if" condition; if the
2404 condition is true, the result is "true". As before, when the second string
2405 is omitted, a false condition yields an empty string. This makes it less
2406 cumbersome to write custom ACL and router conditions.
2408 34. Failure to deliver a bounce message always caused it to be frozen, even if
2409 there was an errors_to setting on the router. The errors_to setting is now
2412 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2413 canonical form (fully expanded) before being placed in
2414 $sender_host_address.
2416 36. The table in the code that translates DNS record types into text (T_A to
2417 "A" for instance) was missing entries for NS and CNAME. It is just possible
2418 that this could have caused confusion if both these types were looked up
2419 for the same domain, because the text type is used as part of Exim's
2420 per-process caching. But the chance of anyone hitting this buglet seems
2423 37. The dnsdb lookup has been extended in a number of ways.
2425 (1) There is a new type, "zns", which walks up the domain tree until it
2426 finds some nameserver records. It should be used with care.
2428 (2) There is a new type, "mxh", which is like "mx" except that it returns
2429 just the host names, not the priorities.
2431 (3) It is now possible to give a list of domains (or IP addresses) to be
2432 looked up. The behaviour when one of the lookups defers can be
2433 controlled by a keyword.
2435 (4) It is now possible to specify the separator character for use when
2436 multiple records are returned.
2438 38. The dnslists ACL condition has been extended: it is now possible to supply
2439 a list of IP addresses and/or domains to be looked up in a particular DNS
2442 39. Added log_selector=+queue_time_overall.
2444 40. When running the queue in the test harness, wait just a tad after forking a
2445 delivery process, to get repeatability of debugging output.
2447 41. Include certificate and key file names in error message when GnuTLS fails
2448 to set them up, because the GnuTLS error message doesn't include the name
2449 of the failing file when there is a problem reading it.
2451 42. Allow both -bf and -bF in the same test run.
2453 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2455 44. The "Exiscan patch" is now merged into the mainline Exim source.
2457 45. Sometimes the final signoff response after QUIT could fail to get
2458 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2459 < 0 before doing a fflush(). This bug looks as though it goes back to the
2460 introduction of TLS in release 3.20, but "sometimes" must have been rare
2461 because the tests only now provoked it.
2463 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2464 (this can affect the format of dates).
2466 47. exim_tidydb, when checking for the continued existence of a message for
2467 which it has found a message-specific retry record, was not finding
2468 messages that were in split spool directories. Consequently, it was
2469 deleting retry records that should have stayed in existence.
2471 48. Steve fixed some bugs in eximstats.
2473 49. The SPA authentication driver was not abandoning authentication and moving
2474 on to the next authenticator when an expansion was forced to fail,
2475 contradicting the general specification for all authenticators. Instead it
2476 was generating a temporary error. It now behaves as specified.
2478 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2479 (the order specifies the preference for clients). The order is now AES256,
2480 AES128, 3DES, ARCFOUR128.
2482 51. Small patch to Sieve code - explicitly set From: when generating an
2485 52. Exim crashed if a remote delivery caused a very long error message to be
2486 recorded - for instance if somebody sent an entire SpamAssassin report back
2487 as a large number of 550 error lines. This bug was coincidentally fixed by
2488 increasing the size of one of Exim's internal buffers (big_buffer) that
2489 happened as part of the Exiscan merge. However, to be on the safe side, I
2490 have made the code more robust (and fixed the comments that describe what
2493 53. Now that there can be additional text after "Completed" in log lines (if
2494 the queue_time_overall log selector is set), a one-byte patch to exigrep
2495 was needed to allow it to recognize "Completed" as not the last thing in
2498 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2499 patch that reportedly fixes this has been added. I am not expert enough to
2500 create a test for it. This is what the patch creator wrote:
2502 "I found a little strange behaviour of ldap code when working with
2503 Windows 2003 AD Domain, where users was placed in more than one
2504 Organization Units. When I tried to give exim partial DN, the exit code
2505 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2506 But simultaneously result of request was absolutely normal ldap result,
2507 so I produce this patch..."
2509 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2510 REFERENCE, so I have modified the code to exclude the patch when that macro
2513 55. Some experimental protocols are using DNS PTR records for new purposes. The
2514 keys for these records are domain names, not reversed IP addresses. The
2515 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2516 leaves it alone. Component reversal etc. now happens only for IP addresses.
2519 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2521 57. Double the size of the debug message buffer (to 2048) so that more of very
2522 long debug lines gets shown.
2524 58. The exicyclog utility now does better if the number of log files to keep
2525 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2527 59. Two changes related to the smtp_active_hostname option:
2529 (1) $smtp_active_hostname is now available as a variable.
2530 (2) The default for smtp_banner uses $smtp_active_hostname instead
2531 of $primary_hostname.
2533 60. The host_aton() function is supposed to be passed a string that is known
2534 to be a valid IP address. However, in the case of IPv6 addresses, it was
2535 not checking this. This is a hostage to fortune. Exim now panics and dies
2536 if the condition is not met. A case was found where this could be provoked
2537 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2538 components; fortuitously, this particular loophole had already been fixed
2539 by change 4.50/55 above.
2541 If there are any other similar loopholes, the new check in host_aton()
2542 itself should stop them being exploited. The report I received stated that
2543 data on the command line could provoke the exploit when Exim was running as
2544 exim, but did not say which command line option was involved. All I could
2545 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2546 running as the user.
2549 61. There was a buffer overflow vulnerability in the SPA authentication code
2550 (which came originally from the Samba project). I have added a test to the
2551 spa_base64_to_bits() function which I hope fixes it.
2554 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2555 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2557 63. The daemon start-up calls getloadavg() while still root for those OS that
2558 need the first call to be done as root, but it missed one case: when
2559 deliver_queue_load_max is set with deliver_drop_privilege. This is
2560 necessary for the benefit of the queue runner, because there is no re-exec
2561 when deliver_drop_privilege is set.
2563 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2564 This has been fixed.
2566 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2567 was in use, was not putting the data itself into the right store pool;
2568 consequently, it could be overwritten for a subsequent message in the same
2569 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2572 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2574 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2575 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2576 the function were treating the return as a boolean value, which happened to
2577 work because 0=false and not-0=true, but is not correct code.
2579 68. The host_aton() function was not handling scoped IPv6 addresses (those
2580 with, for example, "%eth0" on the end) correctly.
2582 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2583 negated items (that is, ~something) in unsigned ints. Some compilers
2584 apparently mutter when there is no cast.
2586 70. If an address verification called from an ACL failed, and did not produce a
2587 user-specific message (i.e. there was only a "system" message), nothing was
2588 put in $acl_verify_message. In this situation, it now puts the system
2591 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2592 session; change 4.31/43 added the unwanted input to the log line - except
2593 that it did not do this in the start of session case. It now does.
2595 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2596 This is wrong and can cause the other end to generate a synchronization
2597 error if it is another Exim or anything else that does the synchronization
2598 check. A QUIT command is no longer sent after a timeout.
2600 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2601 during host lookups.
2603 74. The defer_ok option of callout verification was not working if it was used
2604 when verifying addresses in header lines, that is, for this case:
2606 verify = header_sender/callout=defer_ok
2608 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2609 those file descriptors could be used for SMTP connections. If anything
2610 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2611 could be sent to the SMTP client, causing chaos. The daemon now opens
2612 stdin, stdout, and stderr to /dev/null when it puts itself into the
2615 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2616 log by default. The user can override this with suitable Perl magic.
2618 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2619 the log message when discard triggers, was not working for the DATA ACL or
2620 for the non-SMTP ACL.
2622 78. Error message wording change in sieve.c.
2624 79. If smtp_accept_max_per_host was set, the number of connections could be
2625 restricted to fewer than expected, because the daemon was trying to set up
2626 a new connection before checking whether the processes handling previous
2627 connections had finished. The check for completed processes is now done
2628 earlier. On busy systems, this bug wouldn't be noticed because something
2629 else would have woken the daemon, and it would have reaped the completed
2632 80. If a message was submitted locally by a user whose login name contained one
2633 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2634 It caused a spool format error. I have fixed the spool reading code. A
2635 related problem was that the "from" clause in the Received: line became
2636 illegal because of the space(s). It is now covered by ${quote_local_part.
2638 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2641 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2643 83. Patch from Sieve maintainer to fix unterminated string problem in
2644 "vacation" handling.
2646 84. Some minor changes to the Linux configuration files to help with other
2647 OS variants using glibc.
2649 85. One more patch for Sieve to update vacation handling to latest spec.
2652 ----------------------------------------------------
2653 See the note above about the 4.44 and 4.50 releases.
2654 ----------------------------------------------------
2660 1. Change 4.43/35 introduced a bug that caused file counts to be
2661 incorrectly computed when quota_filecount was set in an appendfile
2664 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2665 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2668 3. Give more explanation in the error message when the command for a transport
2669 filter fails to execute.
2671 4. There are several places where Exim runs a non-Exim command in a
2672 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2673 was being done only for the command run by the queryprogram router. It is
2674 now done for all such subprocesses. The other cases are: ${run, transport
2675 filters, and the commands run by the lmtp and pipe transports.
2677 5. Some older OS have a limit of 256 on the maximum number of file
2678 descriptors. Exim was using setrlimit() to set 1000 as a large value
2679 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2680 systems. I've change it so that if it can't get 1000, it tries for 256.
2682 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2683 was an oversight, and furthermore, ever since the addition of extra
2684 controls (e.g. 4.43/32), the checks on when to allow different forms of
2685 "control" were broken. There should now be diagnostics for all cases when a
2686 control that does not make sense is encountered.
2688 7. $recipients is now available in the predata ACL (oversight).
2690 8. Tidy the search cache before the fork to do a delivery from a message
2691 received from the command line. Otherwise the child will trigger a lookup
2692 failure and thereby defer the delivery if it tries to use (for example) a
2693 cached ldap connection that the parent has called unbind on.
2695 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2696 of $address_data from the recipient verification was clobbered by the
2697 sender verification.
2699 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2700 was its contents. (It was OK if the option was not defined at all.)
2702 11. A "Completed" log line is now written for messages that are removed from
2703 the spool by the -Mrm option.
2705 12. $host_address is now set to the target address during the checking of
2706 ignore_target_hosts.
2708 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2709 being passed; this would have caused $sender_host_name to have been used if
2710 matching the list had actually called for a host name (not very likely,
2711 since this list is usually IP addresses). A host name is now passed as
2714 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2715 code that specifies a non-restarting handler (typically sigaction() in
2716 modern systems) in an attempt to fix a rare and obscure crash bug.
2718 15. Narrowed the window for a race in the daemon that could cause it to ignore
2719 SIGCHLD signals. This is not a major problem, because they are used only to
2720 wake it up if nothing else does.
2722 16. A malformed maildirsize file could cause Exim to calculate negative values
2723 for the mailbox size or file count. Odd effects could occur as a result.
2724 The maildirsize information is now recalculated if the size or filecount
2727 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2728 support for a long time. Removed HAVE_SYS_VFS_H.
2730 18. Updated exipick to current release from John Jetmore.
2732 19. Allow an empty sender to be matched against a lookup in an address list.
2733 Previously the only cases considered were a regular expression, or an
2736 20. Exim went into a mad DNS lookup loop when doing a callout where the
2737 host was specified on the transport, if the DNS lookup yielded more than
2740 21. The RFC2047 encoding function was originally intended for short strings
2741 such as real names; it was not keeping to the 75-character limit for
2742 encoded words that the RFC imposes. It now respects the limit, and
2743 generates multiple encoded words if necessary. To be on the safe side, I
2744 have increased the buffer size for the ${rfc2047: expansion operator from
2747 22. Failure to deliver a bounce message always caused it to be frozen, even if
2748 there was an errors_to setting on the router. The errors_to setting is now
2751 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2752 canonical form (fully expanded) before being placed in
2753 $sender_host_address.
2755 24. Updated eximstats to version 1.33
2757 25. Include certificate and key file names in error message when GnuTLS fails
2758 to set them up, because the GnuTLS error message doesn't include the name
2759 of the failing file when there is a problem reading it.
2761 26. Expand error message when OpenSSL has problems setting up cert/key files.
2764 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2765 (this can affect the format of dates).
2767 28. exim_tidydb, when checking for the continued existence of a message for
2768 which it has found a message-specific retry record, was not finding
2769 messages that were in split spool directories. Consequently, it was
2770 deleting retry records that should have stayed in existence.
2772 29. eximstats updated to version 1.35
2773 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2774 1.35 - bugfix such that pie charts by volume are generated correctly
2776 30. The SPA authentication driver was not abandoning authentication and moving
2777 on to the next authenticator when an expansion was forced to fail,
2778 contradicting the general specification for all authenticators. Instead it
2779 was generating a temporary error. It now behaves as specified.
2781 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2782 (the order specifies the preference for clients). The order is now AES256,
2783 AES128, 3DES, ARCFOUR128.
2785 31. Small patch to Sieve code - explicitly set From: when generating an
2788 32. Exim crashed if a remote delivery caused a very long error message to be
2789 recorded - for instance if somebody sent an entire SpamAssassin report back
2790 as a large number of 550 error lines. This bug was coincidentally fixed by
2791 increasing the size of one of Exim's internal buffers (big_buffer) that
2792 happened as part of the Exiscan merge. However, to be on the safe side, I
2793 have made the code more robust (and fixed the comments that describe what
2796 33. Some experimental protocols are using DNS PTR records for new purposes. The
2797 keys for these records are domain names, not reversed IP addresses. The
2798 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2799 leaves it alone. Component reversal etc. now happens only for IP addresses.
2802 34. The host_aton() function is supposed to be passed a string that is known
2803 to be a valid IP address. However, in the case of IPv6 addresses, it was
2804 not checking this. This is a hostage to fortune. Exim now panics and dies
2805 if the condition is not met. A case was found where this could be provoked
2806 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2807 components; fortuitously, this particular loophole had already been fixed
2808 by change 4.50/55 or 4.44/33 above.
2810 If there are any other similar loopholes, the new check in host_aton()
2811 itself should stop them being exploited. The report I received stated that
2812 data on the command line could provoke the exploit when Exim was running as
2813 exim, but did not say which command line option was involved. All I could
2814 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2815 running as the user.
2818 35. There was a buffer overflow vulnerability in the SPA authentication code
2819 (which came originally from the Samba project). I have added a test to the
2820 spa_base64_to_bits() function which I hope fixes it.
2823 36. The daemon start-up calls getloadavg() while still root for those OS that
2824 need the first call to be done as root, but it missed one case: when
2825 deliver_queue_load_max is set with deliver_drop_privilege. This is
2826 necessary for the benefit of the queue runner, because there is no re-exec
2827 when deliver_drop_privilege is set.
2829 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2830 was in use, was not putting the data itself into the right store pool;
2831 consequently, it could be overwritten for a subsequent message in the same
2832 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2835 38. Sometimes the final signoff response after QUIT could fail to get
2836 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2837 < 0 before doing a fflush(). This bug looks as though it goes back to the
2838 introduction of TLS in release 3.20, but "sometimes" must have been rare
2839 because the tests only now provoked it.
2845 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2846 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2847 Now it returns an integer. A number of calls were still expecting a T/F
2848 return. Fortuitously, in all cases, the tests worked in OK situations,
2849 which is the norm. However, things would have gone wrong on any write
2850 failures on the smtp file descriptor. This function is used when sending
2851 messages over SMTP and also when doing verify callouts.
2853 2. When Exim is called to do synchronous delivery of a locally submitted
2854 message (the -odf or -odi options), it no longer closes stderr before doing
2857 3. Implemented the mua_wrapper option.
2859 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2861 5. Implemented the functions header_remove(), header_testname(),
2862 header_add_at_position(), and receive_remove_recipient(), and exported them
2865 6. If an ACL "warn" statement specified the addition of headers, Exim already
2866 inserted X-ACL-Warn: at the start if there was no header name. However, it
2867 was not making this test for the second and subsequent header lines if
2868 there were newlines in the string. This meant that an invalid header could
2869 be inserted if Exim was badly configured.
2871 7. Allow an ACL "warn" statement to add header lines at the start or after all
2872 the Received: headers, as well as at the end.
2874 8. Added the rcpt_4xx retry error code.
2876 9. Added postmaster_mailfrom=xxx to callout verification option.
2878 10. Added mailfrom=xxxx to the callout verification option, for verify=
2881 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2882 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2884 12. Inserted some casts to stop certain compilers warning when using pointer
2885 differences as field lengths or precisions in printf-type calls (mostly
2886 affecting debugging statements).
2888 13. Added optional readline() support for -be (dynamically loaded).
2890 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2891 same clock tick as a message's arrival, so that its received time was the
2892 same as the "first fail" time on the retry record, and that message
2893 remained on the queue past the ultimate address timeout, every queue runner
2894 would try a delivery (because it was past the ultimate address timeout) but
2895 after another failure, the ultimate address timeout, which should have then
2896 bounced the address, did not kick in. This was a "< instead of <=" error;
2897 in most cases the first failure would have been in the next clock tick
2898 after the received time, and all would be well.
2900 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2901 being recognized when the domain list was tested by the match_domain
2902 condition in an expansion string.
2904 16. Added the ${str2b64: operator.
2906 17. Exim was always calling setrlimit() to set a large limit for the number of
2907 processes, without checking whether the existing limit was already
2908 adequate. (It did check for the limit on file descriptors.) Furthermore,
2909 errors from getrlimit() and setrlimit() were being ignored. Now they are
2910 logged to the main and panic logs, but Exim does carry on, to try to do its
2911 job under whatever limits there are.
2913 18. Imported PCRE 5.0.
2915 19. Trivial typo in log message " temporarily refused connection" (the leading
2918 20. If the log selector return_path_on_delivery was set and an address was
2919 redirected to /dev/null, the delivery process crashed because it assumed
2920 that a return path would always be set for a "successful" delivery. In this
2921 case, the whole delivery is bypassed as an optimization, and therefore no
2924 21. Internal re-arrangement: the function for sending a challenge and reading
2925 a response while authentication was assuming a zero-terminated challenge
2926 string. It's now changed to take a pointer and a length, to allow for
2927 binary data in such strings.
2929 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2931 23. Exim was not respecting finduser_retries when seeking the login of the
2932 uid under which it was called; it was always trying 10 times. (The default
2933 setting of finduser_retries is zero.) Also, it was sleeping after the final
2934 failure, which is pointless.
2936 24. Implemented tls_on_connect_ports.
2938 25. Implemented acl_smtp_predata.
2940 26. If the domain in control=submission is set empty, Exim assumes that the
2941 authenticated id is a complete email address when it generates From: or
2942 Sender: header lines.
2944 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2945 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2946 chown and chgrp in /bin and hostname in /usr/bin.
2948 28. Exim was keeping the "process log" file open after each use, just as it
2949 does for the main log. This opens the possibility of it remaining open for
2950 long periods when the USR1 signal hits a daemon. Occasional processlog
2951 errors were reported, that could have been caused by this. Anyway, it seems
2952 much more sensible not to leave this file open at all, so that is what now
2955 29. The long-running daemon process does not normally write to the log once it
2956 has entered its main loop, and it closes the log before doing so. This is
2957 so that log files can straightforwardly be renamed and moved. However,
2958 there are a couple of unusual error situations where the daemon does write
2959 log entries, and I had neglected to close the log afterwards.
2961 30. The text of an SMTP error response that was received during a remote
2962 delivery was being truncated at 512 bytes. This is too short for some of
2963 the long messages that one sometimes sees. I've increased the limit to
2966 31. It is now possible to make retry rules that apply only when a message has a
2967 specific sender, in particular, an empty sender.
2969 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2970 it possible to be selective about when SMTP synchronization is enforced.
2972 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2974 32. Implemented hosts_connection_nolog.
2976 33. Added an ACL for QUIT.
2978 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2981 35. Added mailbox_size and mailbox_filecount to appendfile.
2983 36. Added control = no_multiline_responses to ACLs.
2985 37. There was a bug in the logic of the code that waits for the clock to tick
2986 in the case where the clock went backwards by a substantial amount such
2987 that the microsecond fraction of "now" was more than the microsecond
2988 fraction of "then" (but the whole seconds number was less).
2990 38. Added support for the libradius Radius client library this is found on
2991 FreeBSD (previously only the radiusclient library was supported).
2997 1. When certain lookups returned multiple values in the form name=value, the
2998 quoting of the values was not always being done properly. Specifically:
2999 (a) If the value started with a double quote, but contained no whitespace,
3001 (b) If the value contained whitespace other than a space character (i.e.
3002 tabs or newlines or carriage returns) it was not quoted.
3003 This fix has been applied to the mysql and pgsql lookups by writing a
3004 separate quoting function and calling it from the lookup code. The fix
3005 should probably also be applied to nisplus, ibase and oracle lookups, but
3006 since I cannot test any of those, I have not disturbed their existing code.
3008 2. A hit in the callout cache for a specific address caused a log line with no
3009 reason for rejecting RCPT. Now it says "Previous (cached) callout
3010 verification failure".
3012 3. There was an off-by-one bug in the queryprogram router. An over-long
3013 return line was truncated at 256 instead of 255 characters, thereby
3014 overflowing its buffer with the terminating zero. As well as fixing this, I
3015 have increased the buffer size to 1024 (and made a note to document this).
3017 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3018 when Exim is waiting for an SMTP response from a remote server, Exim
3019 restarts its select() call on the socket, thereby resetting its timeout.
3020 This is not a problem when such interrupts are rare. Somebody set up a cron
3021 job to run exiwhat every 2 minutes, which is less than the normal select()
3022 timeout (5 or 10 minutes). This meant that the select() timeout never
3023 kicked in because it was always reset. I have fixed this by comparing the
3024 time when an interrupt arrives with the time at the start of the first call
3025 to select(). If more time than the timeout has elapsed, the interrupt is
3026 treated as a timeout.
3028 5. Some internal re-factoring in preparation for the addition of Sieve
3029 extensions (by MH). In particular, the "personal" test is moved to a
3030 separate function, and given an option for scanning Cc: and Bcc: (which is
3031 not set for Exim filters).
3033 6. When Exim created an email address using the login of the caller as the
3034 local part (e.g. when creating a From: or Sender: header line), it was not
3035 quoting the local part when it contained special characters such as @.
3037 7. Installed new OpenBSD configuration files.
3039 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3040 try to make them clearer.
3042 9. Callout options, other than the timeout value, were being ignored when
3043 verifying sender addresses in header lines. For example, when using
3045 verify = header_sender/callout=no_cache
3047 the cache was (incorrectly) being used.
3049 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3050 only the Cygwin environment.
3052 11. When return_path_on_delivery was set as a log selector, if different remote
3053 addresses in the same message used different return paths and parallel
3054 remote delivery occurred, the wrong values would sometimes be logged.
3055 (Whenever a remote delivery process finished, the return path value from
3056 the most recently started remote delivery process was logged.)
3058 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3059 lines when AUTH and/or TLS are in use. This is the "received protocol"
3060 field. Exim used to use "asmtp" for authenticated SMTP, without any
3061 indication (in the protocol name) for TLS use. Now it follows the RFC and
3062 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3063 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3064 names appear in log lines as well as in Received: header lines.
3066 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3067 extensions, and comparison tests, and to fix some bugs.
3069 14. Changes to the "personal" filter test:
3071 (1) The test was buggy in that it was just doing the equivalent of
3072 "contains" tests on header lines. For example, if a user's address was
3073 anne@some.where, the "personal" test would incorrectly be true for
3075 To: susanne@some.where
3077 This test is now done by extracting each address from the header in turn,
3078 and checking the entire address. Other tests that are part of "personal"
3079 are now done using regular expressions (for example, to check local parts
3080 of addresses in From: header lines).
3082 (2) The list of non-personal local parts in From: addresses has been
3083 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3084 taken from the Sieve specification recommendations.
3086 (3) If the message contains any header line starting with "List-" it is
3087 treated as non-personal.
3089 (4) The test for "circular" in the Subject: header line has been removed
3090 because it now seems ill-conceived.
3092 15. Minor typos in src/EDITME comments corrected.
3094 16. Installed latest exipick from John Jetmore.
3096 17. If headers_add on a router specified a text string that was too long for
3097 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3098 of string_sprintf() is now avoided.
3100 18. $message_body_size was not set (it was always zero) when running the DATA
3101 ACL and the local_scan() function.
3103 19. For the "mail" command in an Exim filter, no default was being set for
3104 the once_repeat time, causing a random time value to be used if "once" was
3105 specified. (If the value happened to be <= 0, no repeat happened.) The
3106 default is now 0s, meaning "never repeat". The "vacation" command was OK
3107 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3108 (I found it when inspecting the code).
3110 20. There is now an overall timeout for performing a callout verification. It
3111 defaults to 4 times the callout timeout, which applies to individual SMTP
3112 commands during the callout. The overall timeout applies when there is more
3113 than one host that can be tried. The timeout is checked before trying the
3114 next host. This prevents very long delays if there are a large number of
3115 hosts and all are timing out (e.g. when the network connections are timing
3116 out). The value of the overall timeout can be changed by specifying an
3117 additional sub-option for "callout", called "maxwait". For example:
3119 verify = sender/callout=5s,maxwait=20s
3121 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3122 to the end before writing, but this should make it even safer).
3124 22. Exim was forgetting that it had advertised PIPELINING for the second and
3125 subsequent messages on an SMTP connection. It was also not resetting its
3126 memory on STARTTLS and an internal HELO.
3128 23. When Exim logs an SMTP synchronization error within a session, it now
3129 records whether PIPELINING has been advertised or not.
3131 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3132 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3133 rather than long int.
3135 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3137 26. Added the never_mail option to autoreply.
3143 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3144 crash if the getsockname() call failed; this can happen if a connection is
3145 closed very soon after it is established. The problem was simply in the
3146 order in which certain operations were done, causing Exim to try to write
3147 to the SMTP stream before it had set up the file descriptor. The bug has
3148 been fixed by making things happen in the correct order.
3154 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3155 before the connection was closed, thus losing the rejection response.
3157 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3158 some early Solaris releases, but causes trouble in current releases where
3159 socklen_t is defined.
3161 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3164 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3167 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3168 that releasing the top of it at the end releases what was used for sub-
3169 expansions (unless the block got too big). However, discard this block if
3170 the first thing is a variable or header, so that we can use its block when
3171 it is dynamic (useful for very large $message_headers, for example).
3173 6. Lookups now cache *every* query, not just the most recent. A new, separate
3174 store pool is used for this. It can be recovered when all lookup caches are
3175 flushed. Lookups now release memory at the end of their result strings.
3176 This has involved some general refactoring of the lookup sources.
3178 7. Some code has been added to the store_xxx() functions to reduce the amount
3179 of flapping under certain conditions.
3181 8. log_incoming_interface used to affect only the <= reception log lines. Now
3182 it causes the local interface and port to be added to several more SMTP log
3183 lines, for example "SMTP connection from", and rejection lines.
3185 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3187 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3189 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3190 could be overwritten at the end of the current message (or the start of a
3191 new message if it was set in a HELO ACL). The value is now preserved for
3192 the duration of the SMTP connection.
3194 12. If a transport had a headers_rewrite setting, and a matching header line
3195 contained an unqualified address, that address was qualified, even if it
3196 did not match any rewriting rules. The underlying bug was that the values
3197 of the flags that permit the existence of unqualified sender and recipient
3198 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3199 non-local messages, and by -bnq for local messages) were not being
3200 preserved with the message after it was received.
3202 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3203 "next input=" as part of the text comprising the host identity instead of
3204 the correct text. The code was using the same buffer for two different
3205 strings. However, depending on which order the printing function evaluated
3206 its arguments, the bug did not always show up. Under Linux, for example, my
3207 test suite worked just fine.
3209 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3210 doesn't work with some older versions of Perl. It has been changed to "my",
3211 which in any case is probably the better facility to use.
3213 15. A really picky compiler found some instances of statements for creating
3214 error messages that either had too many or two few arguments for the format
3217 16. The size of the buffer for calls to the DNS resolver has been increased
3218 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3219 for addresses that have a lot of PTR records. This alleviates a problem; it
3220 does not fully solve it.
3222 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3223 buffer now truncates the list and logs the incident, which is the same
3224 action as happens when Exim is looking up a host name and its aliases.
3225 Previously in this situation something unpredictable would happen;
3226 sometimes it was "internal error: store_reset failed".
3228 18. If a server dropped the connection unexpectedly when an Exim client was
3229 using GnuTLS and trying to read a response, the client delivery process
3230 crashed while trying to generate an error log message.
3232 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3233 string, for example:
3235 warn message = H1: something\nH2: something
3237 the text was added as a single header line from Exim's point of view
3238 though it ended up OK in the delivered message. However, searching for the
3239 second and subsequent header lines using $h_h2: did not work. This has been
3240 fixed. Similarly, if a system filter added multiple headers in this way,
3241 the routers could not see them.
3243 20. Expanded the error message when iplsearch is called with an invalid key to
3244 suggest using net-iplsearch in a host list.
3246 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3247 ACLs are no longer actually imposed (and a message to that effect is
3250 22. If a "gecos" field in a passwd entry contained escaped characters, in
3251 particular, if it contained a \" sequence, Exim got it wrong when building
3252 a From: or a Sender: header from that name. A second bug also caused
3253 incorrect handling when an unquoted " was present following a character
3254 that needed quoting.
3256 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3257 was not being matched caselessly.
3259 24. Arranged for all hyphens in the exim.8 source to be escaped with
3262 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3263 properly. Recipient callout cache records were still being keyed to include
3264 the sender, even when use_sender was set false. This led to far more
3265 callouts that were necessary. The sender is no longer included in the key
3266 when use_sender is false.
3268 26. Added "control = submission" modifier to ACLs.
3270 27. Added the ${base62d: operator to decode base 62 numbers.
3272 28. dnsdb lookups can now access SRV records.
3274 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3275 the configuration file.
3277 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3278 (-v) mode. This makes the output for a verbose queue run more intelligible.
3280 31. Added a use_postmaster feature to recipient callouts.
3282 32. Added the $body_zerocount variable, containing the number of binary zero
3283 bytes in the message body.
3285 33. The time of last modification of the "new" subdirectory is now used as the
3286 "mailbox time last read" when there is a quota error for a maildir
3289 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3291 35. Added +ignore_unknown as a special item in host lists.
3293 36. Code for decoding IPv6 addresses in host lists is now included, even if
3294 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3295 address was recognized as an IP address, but was then not correctly decoded
3296 into binary, causing unexpected and incorrect effects when compared with
3303 1. Very minor rewording of debugging text in manualroute to say "list of
3304 hosts" instead of "hostlist".
3306 2. If verify=header_syntax was set, and a header line with an unqualified
3307 address (no domain) and a large number of spaces between the end of the
3308 name and the colon was received, the reception process suffered a buffer
3309 overflow, and (when I tested it) crashed. This was caused by some obsolete
3310 code that should have been removed. The fix is to remove it!
3312 3. When running in the test harness, delay a bit after writing a bounce
3313 message to get a bit more predictability in the log output.
3315 4. Added a call to search_tidyup() just before forking a reception process. In
3316 theory, someone could use a lookup in the expansion of smtp_accept_max_
3317 per_host which, without the tidyup, could leave open a database connection.
3319 5. Added the variables $recipient_data and $sender_data which get set from a
3320 lookup success in an ACL "recipients" or "senders" condition, or a router
3321 "senders" option, similar to $domain_data and $local_part_data.
3323 6. Moved the writing of debug_print from before to after the "senders" test
3326 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3327 problems for message scanning, either using a data ACL, or using
3328 local_scan() because the Received: header was not generated till after they
3329 were called (in order to set the time as the time of reception completion).
3330 I have revised the way this works. The header is now generated after the
3331 body is received, but before the ACL or local_scan() are called. After they
3332 are run, the timestamp in the header is updated.
3338 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3339 before starting a queue runner without re-exec. This happened only when
3340 deliver_drop_privilege was set or when the Exim user was set to root. The
3341 effect of the bug was that timeouts during subsequent deliveries caused
3342 crashes instead of being properly handled. The handler is now left at its
3343 default (and expected) setting.
3345 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3346 message, again when deliver_drop_privilege is set or Exim is run as root.
3347 The bug described in (1) was not present in this case, but the tidying up
3348 of the other signals was missing. I have made the two cases consistent.
3350 3. The ignore_target_hosts setting on a manualroute router was being ignored
3351 for hosts that were looked up using the /MX notation.
3353 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3356 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3357 operated on the sender address. After changing the $sender_address to <>
3358 for the sender address verify, Exim was re-instated it as the original
3359 (before rewriting) address, but remembering that it had rewritten it, so it
3360 wasn't rewriting it again. This bug also had the effect of breaking the
3361 sender address verification caching when the sender address was rewritten.
3363 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3364 This has been changed so that if the ip literal address matches
3365 ignore_target_hosts, the router declines.
3367 7. Added expansion conditions match_domain, match_address, and match_local_
3368 part (NOT match_host).
3370 8. The placeholder for the Received: header didn't have a length field set.
3372 9. Added code to Exim itself and to exim_lock to test for a specific race
3373 condition that could lead to file corruption when using MBX delivery. The
3374 issue is with the lockfile that is created in /tmp. If this file is removed
3375 after a process has opened it but before that process has acquired a lock,
3376 there is the potential for a second process to recreate the file and also
3377 acquire a lock. This could lead to two Exim processes writing to the file
3378 at the same time. The added code performs the same test as UW imapd; it
3379 checks after acquiring the lock that its file descriptor still refers to
3380 the same named file.
3382 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3383 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3386 11. Added the smtp_active_hostname option. If used, this will typically be made
3387 to depend on the incoming interface address. Because $interface_address is
3388 not set up until the daemon has forked a reception process, error responses
3389 that can happen earlier (such as "too many connections") no longer contain
3392 12. If an expansion in a condition on a "warn" statement fails because a lookup
3393 defers, the "warn" statement is abandoned, and the next ACL statement is
3394 processed. Previously this caused the whole ACL to be aborted.
3396 13. Added the iplsearch lookup type.
3398 14. Added ident_timeout as a log selector.
3400 15. Added tls_certificate_verified as a log selector.
3402 16. Added a global option tls_require_ciphers (compare the smtp transport
3403 option of the same name). This controls incoming TLS connections.
3405 17. I finally figured out how to make tls_require_ciphers do a similar thing
3406 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3407 before starting the TLS session.
3409 18. Tabs are now shown as \t in -bP output.
3411 19. If the log selector return_path_on_delivery was set, Exim crashed when
3412 bouncing a message because it had too many Received: header lines.
3414 20. If two routers both had headers_remove settings, and the first one included
3415 a superfluous trailing colon, the final name in the first list and the
3416 first name in the second list were incorrectly joined into one item (with a
3417 colon in the middle).
3423 1. Added -C and -D options to the exinext utility, mainly to make it easier
3424 to include in the automated testing, but these could be helpful when
3425 multiple configurations are in use.
3427 2. The exinext utility was not formatting the output nicely when there was
3428 an alternate port involved in the retry record key, nor when there was a
3429 message id as well (for retries that were specific to a specific message
3430 and a specific host). It was also confused by IPv6 addresses, because of
3431 the additional colons they contain. I have fixed the IPv4 problem, and
3432 patched it up to do a reasonable job for IPv6.
3434 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3435 delivery, the log line now contains "pipelined" if PIPELINING was used.
3437 4. An SMTP transport process used to panic and die if the bind() call to set
3438 an explicit outgoing interface failed. This has been changed; it is now
3439 treated in the same way as a connect() failure.
3441 5. A reference to $sender_host_name in the part of a conditional expansion
3442 that was being skipped was still causing a DNS lookup. This no longer
3445 6. The def: expansion condition was not recognizing references to header lines
3446 that used bh_ and bheader_.
3448 7. Added the _cache feature to named lists.
3450 8. The code for checking quota_filecount in the appendfile transport was
3451 allowing one more file than it should have been.
3453 9. For compatibility with Sendmail, the command line option
3461 and sets the incoming protocol and host name (for trusted callers). The
3462 host name and its colon can be omitted when only the protocol is to be set.
3463 Note the Exim already has two private options, -pd and -ps, that refer to
3464 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3465 "s", but I don't think that's a major issue.
3467 10. A number of refactoring changes to the code, none of which should affect
3470 (a) The number of logging options was getting close to filling up the
3471 32-bit word that was used as a bit map. I have split them into two classes:
3472 those that are passed in the argument to log_write(), and those that are
3473 only ever tested independently outside of that function. These are now in
3474 separate 32-bit words, so there is plenty of room for expansion again.
3475 There is no change in the user interface or the logging behaviour.
3477 (b) When building, for example, log lines, the code previously used a
3478 macro that called string_cat() twice, in order to add two strings. This is
3479 not really sufficiently general. Furthermore, there was one instance where
3480 it was actually wrong because one of the argument was used twice, and in
3481 one call a function was used. (As it happened, calling the function twice
3482 did not affect the overall behaviour.) The macro has been replaced by a
3483 function that can join an arbitrary number of extra strings onto a growing
3486 (c) The code for expansion conditions now uses a table and a binary chop
3487 instead of a serial search (which was left over from when there were very
3488 few conditions). Also, it now recognizes conditions like "pam" even when
3489 the relevant support is not compiled in: a suitably worded error message is
3490 given if an attempt is made to use such a condition.
3492 11. Added ${time_interval:xxxxx}.
3494 12. A bug was causing one of the ddress fields not to be passed back correctly
3495 from remote delivery subprocesses. The field in question was not being
3496 subsequently used, so this caused to problems in practice.
3498 13. Added new log selectors queue_time and deliver_time.
3500 14. Might have fixed a bug in maildirsizefile handling that threw up
3501 "unexpected character" debug warnings, and recalculated the data
3502 unnecessarily. In any case, I expanded the warning message to give more
3505 15. Added the message "Restricted characters in address" to the statements in
3506 the default ACL that block characters like @ and % in local parts.
3508 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3509 Three changes have been made:
3511 (a) There was a serious bug; a negative response to MAIL caused the whole
3512 recipient domain to be cached as invalid, thereby blocking all messages
3513 to all local parts at the same domain, from all senders. This bug has
3514 been fixed. The domain is no longer cached after a negative response to
3515 MAIL if the sender used is not empty.
3517 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3520 (c) A new callout option, "use_sender" has been added for people who want
3521 the modified behaviour.
3527 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3530 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3531 indeed breaks things for older releases.
3533 3. Added additional logging to the case where there is a problem reading data
3534 from a filter that is running in a subprocess using a pipe, in order to
3535 try to track down a specific problem.
3537 4. Testing facility fudge: when running in the test harness and attempting
3538 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3539 getting "No route to host". Convert this to a timeout.
3541 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3544 6. Some OS don't have socklen_t but use size_t instead. This affects the
3545 fifth argument of getsockopt() amongst other things. This is now
3546 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3547 can be set for individual OS. I have set it for SunOS5, OSF1, and
3548 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3549 some earlier ones do not.
3551 7. Change 4.30/15 was not doing the test caselessly.
3553 8. The standard form for an IPv6 address literal was being rejected by address
3554 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3555 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3556 this, as well as the form without the "IPv6" on the front (but only when
3557 address literals are enabled, of course).
3559 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3561 10. Exim crashed if a message with an empty sender address specified by -f
3562 encountered a router with an errors_to setting. This could be provoked only
3563 by a command such as
3567 where an empty string was supplied; "<>" did not hit this bug.
3569 11. Installed PCRE release 4.5.
3571 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3572 remained set. It is now erased.
3574 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3575 times from message ids (which are base 36 rather than the normal 62).
3577 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3578 were being counted as actual protocol errors, and logged if the log
3579 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3580 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3581 and DATA following a set of rejected RCPTs do not count as protocol errors.
3582 In other words, Exim assumes they were pipelined, though this may not
3583 actually be the case. Of course, in all cases the client gets an
3584 appropriate error code.
3586 15. If a lookup fails in an ACL condition, a message about the failure may
3587 be available; it is used if testing the ACL cannot continue, because most
3588 such messages specify what the cause of the deferral is. However, some
3589 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3590 that caused an old message to be retained and used if a later statement
3591 caused a defer, replacing the real cause of the deferral.
3593 16. If an IP address had so many PTR records that the DNS lookup buffer
3594 was not large enough to hold them, Exim could crash while trying to process
3595 the truncated data. It now detects and logs this case.
3597 17. Further to 4.21/58, another change has been made: if (and only if) the
3598 first line of a message (the first header line) ends with CRLF, a bare LF
3599 in a subsequent header line has a space inserted after it, so as not to
3600 terminate the header.
3602 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3603 unnecessarily, used atoi() instead of strtol(), and didn't check the
3604 termination when getting file sizes from file names by regex.
3606 19. Completely re-implemented the support for maildirsize files, in the light
3607 of a number of problems with the previous contributed implementation
3608 (4.30/29). In particular:
3610 . If the quota is zero, the maildirsize file is maintained, but no quota is
3613 . If the maildir directory does not exist, it is created before any attempt
3614 to write a maildirsize file.
3616 . The quota value in the file is just a cache; if the quota is changed in
3617 the transport, the new value overrides.
3619 . A regular expression is available for excluding directories from the
3622 20. The autoreply transport checks the characters in options that define the
3623 message's headers; it allows continued headers, but it was checking with
3624 isspace() after an embedded newline instead of explicitly looking for a
3627 21. If all the "regular" hosts to which an address was routed had passed their
3628 expiry times, and had not reached their retry times, the address was
3629 bounced, even if fallback hosts were defined. Now Exim should go on to try
3632 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3633 equivalent code in the SMTP transport. Some hosts send humungous responses
3634 to HELO/EHLO, more than 1024 it seems.
3636 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3637 gives compiler warnings in some environments. I've now done it "properly",
3640 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3641 (because of problems with the built-in one) was declared to return uschar *
3642 instead of char *, causing compiler failure.
3644 25. Fixed a file descriptor leak when processing alias/forward files.
3646 26. Fixed a minor format string issue in dbfn.c.
3648 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3650 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3651 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3654 29. When a sender address is verified, it is cached, to save repeating the test
3655 when there is more than one recipient in a message. However, when the
3656 verification involves a callout, it is possible for different callout
3657 options to be set for different recipients. It is too complicated to keep
3658 track of this in the cache, so now Exim always runs a verification when a
3659 callout is required, relying on the callout cache for the optimization.
3660 The overhead is duplication of the address routing, but this should not be
3663 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3664 to be verified with callout=postmaster, and the main callout worked but the
3665 postmaster check failed, the verification correctly failed. However, if a
3666 subsequent RCPT command asked for sender verification *without* the
3667 postmaster check, incorrect caching caused this verification also to fail,
3670 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3671 it was not caching the DNS options (qualify_single, search_parents) that
3672 were used when the lookup failed. A subsequent lookup with different
3673 options therefore always gave the same answer, though there were cases
3674 where it should not have. (Example: a "domains = !$mx_any" option on a
3675 dnslookup router: the "domains" option is always processed without any
3676 widening, but the router might have qualify_single set.) Now Exim uses the
3677 cached value only when the same options are set.
3679 32. Added John Jetmore's "exipick" utility to the distribution.
3681 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3682 than a timeout (e.g. a certificate is required, and is not provided), an
3683 Exim server now closes the connection immediately. Previously it waited for
3684 the client to close - but if the client is SSL, it seems that they each
3685 wait for each other, leading to a delay before one of them times out.
3687 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3688 maintained 0.8.x compatibility because I don't think many are using it, and
3689 it is clearly obsolete.
3691 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3694 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3695 client certificate was expired. A simple patch fixes this, though I don't
3696 understand the full logic of why the verify callback is called multiple
3699 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3700 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3701 which causes problems with some clients (such as the Certicom SSL Plus
3702 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3703 disables the coutermeasure allowing Eudora to connect."
3705 38. Exim was not checking that a write() to a log file succeeded. This could
3706 lead to Bad Things if a log got too big, in particular if it hit a file
3707 size limit. Exim now panics and dies if it cannot write to a log file, just
3708 as it does if it cannot open a log file.
3710 39. Modified OS/Makefile-Linux so that it now contains
3712 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3714 The two -D definitions ensure that Exim is compiled with large file
3715 support, which makes it possible to handle log files that are bigger than
3718 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3719 instance) a domain was checked against a named list that involved a lookup,
3720 causing $domain_data to be set, then another domain was checked against the
3721 same list, then the first domain was re-checked, the value of $domain_data
3722 after the final check could be wrong. In particular, if the second check
3723 failed, it could be set empty. This bug probably also applied to
3726 41. The strip_trailing_dot option was not being applied to the address given
3727 with the -f command-line option.
3729 42. The code for reading a message's header from the spool was incrementing
3730 $received_count, but never initializing it. This meant that the value was
3731 incorrect (doubled) while delivering a message in the same process in which
3732 it was received. In the most common configuration of Exim, this never
3733 happens - a fresh exec is done - but it can happen when
3734 deliver_drop_privilege is set.
3736 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3737 it now includes up to 150 characters of the unexpected data in the log
3740 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3741 and building data strings. The size of both of these buffers was 10 000
3742 bytes - far larger than anybody would *ever* want, thought I. Needless to
3743 say, somebody hit the limit. I have increased the maximum line length to
3744 20 000 and the maximum data length of concatenated lines to 100 000. I have
3745 also fixed two bugs, because there was no checking on these buffers. Tsk,
3746 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3747 buffer is too small.
3749 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3750 lsearch lookups. Now it does.
3752 46. When parsing a route_list item in a manualroute router, a fixed-length
3753 buffer was used for the list of hosts. I made this 1024 bytes long,
3754 thinking that nobody would ever have a list of hosts that long. Wrong.
3755 Somebody had a whole pile of complicated expansion conditions, and the
3756 string was silently truncated, leading to an expansion error. It turns out
3757 that it is easier to change to an unlimited length (owing to other changes
3758 that have happened since this code was originally written) than to build
3759 structure for giving a limitation error. The length of the item that
3760 expands into the list of hosts is now unlimited.
3762 47. The lsearch lookup could not handle data where the length of text line was
3763 more than 4095 characters. Such lines were truncated, leading to shortened
3764 data being returned. It should now handle lines of any length.
3766 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3767 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3770 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3771 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3772 no longer happens in comment lines. A list of replacements is now placed
3773 at the head of all of the source files, except those whose only change is
3774 to replace PERL_COMMAND in the very first #! line.
3776 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3777 messages on the queue, with a bottom-up merge sort, using code contributed
3778 by Michael Haardt. This should make operations like -bp somewhat faster on
3779 large queues. It won't affect queue runners, except when queue_run_in_order
3782 51. Installed eximstats 1.31 in the distribution.
3784 52. Added support for SRV lookups to the dnslookup router.
3786 53. If an ACL referred to $message_body or $message_body_end, the value was not
3787 reset for any messages that followed in the same SMTP session.
3789 54. The store-handling optimization for building very long strings was not
3790 differentiating between the different store pools. I don't think this
3791 actually made any difference in practice, but I've tidied it.
3793 55. While running the routers to verify a sender address, $sender_address
3794 was still set to the sender address. This is wrong, because when routing to
3795 send a bounce to the sender, it would be empty. Therefore, I have changed
3796 it so that, while verifying a sender address, $sender_address is set to <>.
3797 (There is no change to what happens when verifying a recipient address.)
3799 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3800 target A or AAAA records (if not already returned) without resetting the
3801 qualify_single or search_parents options of the DNS resolver. These are
3802 inappropriate in this case because the targets of MX and SRV records must
3803 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3804 target that, when qualified, matched something in the local domain. These
3805 two options are now turned off when doing these lookups.
3807 57. It seems that at least some releases of Reiserfs (which does not have the
3808 concept of a fixed number of inodes) returns zero and not -1 for the
3809 number of available inodes. This interacted badly with check_spool_inodes,
3810 which assumed that -1 was the "no such thing" setting. What I have done is
3811 to check that the total number of inodes is greater than zero before doing
3812 the test of how many are available.
3814 58. When a "warn" ACL statement has a log_message modifier, the message is
3815 remembered, and not repeated. This is to avoid a lot of repetition when a
3816 message has many recipients that cause the same warning to be written.
3817 Howewer, Exim was preserving the list of already written lines for an
3818 entire SMTP session, which doesn't seem right. The memory is now reset if a
3819 new message is started.
3821 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3822 debugging output unless log_rewrite was also set.
3824 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3825 of (int)(handle) when we know that handle contains (void *)(-1).
3827 61. The Exim daemon panic-logs an error return when it closes the incoming
3828 connection. However "connection reset by peer" seems to be common, and
3829 isn't really an error worthy of noting specially, so that particular error
3832 62. When Exim is trying to find all the local interfaces, it used to panic and
3833 die if the ioctl to get the interface flags failed. However, it seems that
3834 on at least one OS (Solaris 9) it is possible to have an interface that is
3835 included in the list of interfaces, but for which you get a failure error
3836 for this call. This happens when the interface is not "plumbed" into a
3837 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3838 failure of the "get flags" call assumes that the interface is down.
3840 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3841 makes life easier for people who are doing arithmetic on fields extracted
3842 from dates, where you often get leading zeros that should not be
3843 interpreted as octal.
3845 64. Added qualify_domain to the redirect router, to override the global
3848 65. If a pathologically long header line contained very many addresses (the
3849 report of this problem mentioned 10 000) and each of them was rewritten,
3850 Exim could use up a very large amount of memory. (It kept on making new
3851 copies of the header line as it rewrote, and never released the old ones.)
3852 At the expense of a bit more processing, the header rewriting function has
3853 been changed so that it no longer eats memory in this way.
3855 66. The generation of the Received: header has been moved from the time that a
3856 message starts to be received, to the time that it finishes. The timestamp
3857 in the Received: header should now be very close to that of the <= log
3858 line. There are two side-effects of this change:
3860 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3861 logged header lines no longer include the local Received: line, because
3862 it has not yet been created. The same applies to a copy of the message
3863 that is returned to a non-SMTP sender when a message is rejected.
3865 (b) When a filter file is tested using -bf, no additional Received: header
3866 is added to the test message. After some thought, I decided that this
3869 This change does not affect the value of $received_for. It is still set
3870 after address rewriting, but before local_scan() is called.
3872 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3874 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3875 gave an unhelpful panic error message, and a defer error. I have managed to
3876 change this behaviour so that it now rejects any supplied certificate,
3877 which seems right, as the list of acceptable certificates is empty.
3879 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3880 gave an unhelpful defer error. I have not managed to make this reject any
3881 supplied certificates, but the error message it gives is "no certificate
3882 supplied", which is not helpful.
3884 70. exigrep's output now also includes lines that are not associated with any
3885 message, but which match the given pattern. Implemented by a patch from
3886 Martin Sluka, which also tidied up the Perl a bit.
3888 71. Recipient callout verification, like sender verification, was using <> in
3889 the MAIL FROM command. This isn't really the right thing, since the actual
3890 sender may affect whether the remote host accepts the recipient or not. I
3891 have changed it to use the actual sender in the callout; this means that
3892 the cache record is now keyed on a recipient/sender pair, not just the
3893 recipient address. There doesn't seem to be a real danger of callout loops,
3894 since a callout by the remote host to check the sender would use <>.
3895 [SEE ABOVE: changed after hitting problems.]
3897 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3898 temporary errors. However, in the case of such a code being given after
3899 the end of a data transmission (i.e. after ".") Exim was failing to write
3900 a retry record for the message. (Yes, there was some broken host that was
3901 actually sending 8xx at this point.)
3903 73. An unknown lookup type in a host list could cause Exim to panic-die when
3904 the list was checked. (An example that provoked this was putting <; in the
3905 middle of a list instead of at the start.) If this happened during a DATA
3906 ACL check, a -D file could be left lying around. This kind of configuration
3907 error no longer causes Exim to die; instead it causes a defer errror. The
3908 incident is still logged to the main and panic logs.
3910 74. Buglet left over from Exim 3 conversion. The message "too many messages
3911 in one connection" was written to the rejectlog but not the mainlog, except
3912 when address rewriting (yes!) was being logged.
3914 75. Added write_rejectlog option.
3916 76. When a system filter was run not as root (that is, when system_filter_user
3917 was set), the values of the $n variables were not being returned to the
3918 main process; thus, they were not subsequently available in the $sn
3921 77. Added +return_path_on_delivery log selector.
3923 78. A connection timeout was being treated differently from recipients deferred
3924 when testing hosts_max_try with a message that was older than the host's
3925 retry timeout. (The host should not be counted, thus allowing all hosts to
3926 be tried at least once before bouncing.) This may have been the cause of an
3927 occasionally reported bug whereby a message would remain on the queue
3928 longer than the retry timeout, but would be bounced if a delivery was
3929 forced. I say "may" because I never totally pinned down the problem;
3930 setting up timeout/retry tests is difficult. See also the next item.
3932 79. The ultimate address timeout was not being applied to errors that involved
3933 a combination of host plus message (for example, a timeout on a MAIL
3934 command). When an address resolved to a number of possible hosts, and they
3935 were not all tried for each delivery (e.g. because of hosts_max_try), a
3936 message could remain on the queue longer than the retry timeout.
3938 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3941 81. Fixed an obscure SMTP outgoing bug which required at least the following
3942 conditions: (a) there was another message waiting for the same server;
3943 (b) the server returned 5xx to all RCPT commands in the first message so
3944 that the message was not completed; (c) the server dropped the connection
3945 or gave a negative response to the RSET that Exim sends to abort the
3946 transaction. The observed case was a dropped connection after DATA that had
3947 been sent in pipelining mode. That is, the server had advertised PIPELINING
3948 but was not implementing it correctly. The effect of the bug was incorrect
3949 behaviour, such as trying another host, and this could lead to a crash.
3955 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3956 and daemon.c were passed as pointers to ints; they should have been
3957 pointers to socklen_t variables (which are typically unsigned ints).
3959 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3962 3. Fixed a really odd bug that affected only the testing scheme; patching a
3963 certain fixed string in the binary changed the value of another string that
3964 happened to be identical to the end of the original first string.
3966 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3967 name", it returns that address as the IP address. On some operating
3968 systems (e.g. Solaris), it also passes back the IP address string as the
3969 "host name". However, on others (e.g. Linux), it passes back an empty
3970 string. Exim wasn't checking for this, and was changing the host name to an
3971 empty string, assuming it had been canonicized.
3973 5. Although rare, it is permitted to have more than one PTR record for a given
3974 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3975 all the names associated with an address, because they do in Solaris.
3976 However, it seems that they do not in Linux for data that comes from the
3977 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3978 I found this out when I moved to a new Linux workstation and tried to run
3979 the Exim test suite.
3981 To get round this problem I have changed the code so that it now does its
3982 own call to the DNS to look up PTR records when searching for a host name.
3983 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3984 addresses that are only in /etc/hosts are still found.
3986 This behaviour is, however, controlled by an option called host_lookup_
3987 order, which defaults to "bydns:byaddr". If people want to use the other
3988 order, or indeed, just use one or the other means of lookup, they can
3989 specify it in this variable.
3991 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3992 some operating systems, this comes back from gethostbyaddr() as an empty
3993 string, and this is what Exim used to test for. However, it seems that in
3994 other systems, "." is yielded. Exim now tests for this case too.
3996 7. The values of check_spool_space and check_log_space are now held internally
3997 as a number of kilobytes instead of an absolute number of bytes. If a
3998 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3999 kilobyte. This means that much larger values can be stored.
4001 8. Exim monitor: an attempt to get the action menu when not actually pointing
4002 at a message produces an empty menu entitled "No message selected". This
4003 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4004 no entries in it ("Shell widget menu has zero width and/or height"). So I
4005 have added a single, blank menu entry in this case.
4007 9. Added ${quote_local_part.
4009 10. MIME decoding is now applied to the contents of Subject: header lines when
4012 11. Now that a reference to $sender_host_address automatically causes a reverse
4013 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4014 host lookup before query-style lookups in lists that might use this
4015 variable. This has therefore been abolished, and the "net-" prefix is no
4016 longer necessary for query-style lookups.
4018 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4019 have been a typo for LFLAGS, so it has been changed.
4021 13. The install script calls Exim with "-C /dev/null" in order to find the
4022 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4023 to be output. Howeve, since Exim outputs its version number before the
4024 error, it didn't break the script. It just looked ugly. I fixed this by
4025 always allowing "-C /dev/null" if the caller is root.
4027 14. Ignore overlarge ACL variable number when reading spool file - insurance
4028 against a later release with more variables having written the file.
4030 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4031 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4032 this, as well as the form without the "IPv6" on the front.
4034 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4035 OS/Makefile-Darwin file.
4037 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4038 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4040 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4041 variable. However, some OS use ints for inodes. I've added cast to long int
4042 to get rid of the compiler warning.
4044 19. I had forgotten to lock out "/../" in configuration file names when
4045 ALT_CONFIG_PREFIX was set.
4047 20. Routers used for verification do not need to specify transports. However,
4048 if such a router generated a host list, and callout was configured, Exim
4049 crashed, because it could not find a port number from the (non-existent)
4050 transport. It now assumes port 25 in this circumstance.
4052 21. Added the -t option to exigrep.
4054 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4055 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4056 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4057 them is set, LOOKUP_LSEARCH is forced.
4059 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4061 24. Added sender and host information to the "rejected by local_scan()" log
4062 line; previously there was no indication of these.
4064 25. Added .include_if_exists.
4066 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4067 Linux. It turns out that not all file systems support this. Apparently some
4068 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4069 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4070 not supported on the file descriptor, is now ignored when Exim is trying to
4071 sync a directory. This applies only to Linux.
4073 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4075 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4076 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4079 29. Added support for maildirsize files from supplied patch (modified a bit).
4081 30. The use of :fail: followed by an empty string could lead Exim to respond to
4082 sender verification failures with (e.g.):
4084 550 Verification failed for <xxx>
4085 550 Sender verify failed
4087 where the first response line was missing the '-' that indicates it is not
4088 the final line of the response.
4090 31. The loop for finding the name of the user that called Exim had a hardwired
4091 limit of 10; it now uses the value of finduser_retries, which is used for
4092 all other user lookups.
4094 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4097 33. Exim was neglecting to zero errno before one call of strtol() when
4098 expanding a string and expecting an integer value. On some systems this
4099 resulted in spurious "integer overflow" errors. Also, it was casting the
4100 result into an int without checking.
4102 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4103 did not work. The code looks as if it has *never* worked, though it appears
4104 to have been documented since at least releast 1.62. I have made it work.
4106 35. The "timeout_DNS" error in retry rules, also documented since at least
4107 1.62, also never worked. As it isn't clear exactly what this means, and
4108 clearly it isn't a major issue, I have abolished the feature by treating it
4109 as "timeout", and writing a warning to the main and panic logs.
4111 36. The display of retry rules for -brt wasn't always showing the error code
4114 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4115 timeout_connect_A, timeout_connect_MX.
4117 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4118 to the empty sender.
4120 39. The daemon was not analysing the content of -oX till after it had closed
4121 stderr and disconnected from the controlling terminal. This meant that any
4122 syntax errors were only noted on the panic log, and the return code from
4123 the command was 0. By re-arranging the code a little, I've made the
4124 decoding happen first, so such errors now appear on stderr, and the return
4125 code is 1. However, the actual setting up of the sockets still happens in
4126 the disconnected process, so errors there are still only recorded on the
4129 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4130 connections (as happens on some IP stacks) was logged at start up time as
4131 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4132 it from "IPv6 and IPv4", which means that two separate sockets are being
4135 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4136 says whether AF_INET or AF_INET6 was passed as an argument.
4138 42. Exiwhat output was messed up when time zones were included in log
4141 43. Exiwhat now gives more information about the daemon's listening ports,
4142 and whether -tls-on-connect was used.
4144 44. The "port" option of the smtp transport is now expanded.
4146 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4147 silently ignored. Now an error message is written to the main and panic
4150 46. There's a new ACL modifier called "logwrite" which writes to a log file
4151 as soon as it is encountered.
4153 47. Added $local_user_uid and $local_user_gid at routing time.
4155 48. Exim crashed when trying to verify a sender address that was being
4158 49. Exim was recognizing only a space character after ".include". It now also
4159 recognizes a tab character.
4161 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4162 extracting the relevant information from the specification. The man page no
4163 longer contains scrambled data for the -d option, and I've added a section
4164 at the front about calling Exim under different names.
4166 51. Added "extra_headers" argument to the "mail" command in filter files.
4168 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4171 53. Installed eximstats 1.29.
4173 54. Added transport_filter_timeout as a generic transport option.
4175 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4176 Cc: header lines. This was required by RFC 822, but it not required by RFC
4179 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4180 incoming messages that did not have them. Now it does so only if the
4181 message originates locally, that is, if there is no associated remote host
4182 address. When Resent- header lines are present, this applies to the Resent-
4183 lines rather than the non-Resent- lines.
4185 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4186 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4188 58. Messages for configuration errors now include the name of the main
4189 configuration file - useful now that there may be more than one file in a
4190 list (.included file names were always shown).
4192 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4193 for those rare installations that do not start the daemon as root or run it
4194 setuid root. I've cut out the call to initgroups() if the daemon is not
4197 60. The Exim user and group can now be bound into the binary as text strings
4198 that are looked up at the start of Exim's processing.
4200 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4202 62. Added $mailstore_basename variable.
4204 63. Installed patch to sieve.c from Michael Haardt.
4206 64. When Exim failed to open the panic log after failing to open the main log,
4207 the original message it was trying to log was written to stderr and debug
4208 output, but if they were not available (the usual case in production), it
4209 was lost. Now it is written to syslog before the two lines that record the
4210 failures to open the logs.
4212 65. Users' Exim filters run in subprocesses under the user's uid. It is
4213 possible for a "deliver" command or an alias in a "personal" command to
4214 provoke an address rewrite. If logging of address rewriting is configured,
4215 this fails because the process is not running as root or exim. There may be
4216 a better way of dealing with this, but for the moment (because 4.30 needs
4217 to be released), I have disabled address rewrite logging when running a
4218 filter in a non-root, non-exim process.
4224 1. The buildconfig auxiliary program wasn't quoting the value set for
4225 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4226 not defined. This bug was masked in 4.22 by the effect that was fixed in
4229 2. Some messages that were rejected after a message id was allocated were
4230 shown as "incomplete" by exigrep. It no longer does this for messages that
4231 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4233 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4234 have allow_domain_literals set, the ID did not get logged in the <= line.
4235 Domain literals are now always recognized in Message-ID: header lines.
4237 4. The first argument for a ${extract expansion item is the key name or field
4238 number. Leading and trailing spaces in this item were not being ignored,
4239 causing some misleading effects.
4241 5. When deliver_drop_privilege was set, single queue runner processes started
4242 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4243 same command in the process it spins off) were not dropping privilege.
4245 6. When the daemon running as "exim" started a queue runner, it always
4246 re-executed Exim in the spun-off process. This is a waste of effort when
4247 deliver_drop_privilege is set. The new process now just calls the
4248 queue-runner function directly.
4254 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4257 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4258 ignored. Though the use of -oP was forcing the writing of a pid file, it
4259 was always written to the default place.
4261 3. If the message "no IP address found for host xxxx" is generated during
4262 incoming verification, it is now followed by identification of the incoming
4263 connection (so you can more easily find what provoked it).
4265 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4267 5. Added some features to "harden" Exim a bit more against certain attacks:
4269 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4270 be put in Local/Makefile. This is like the never_users runtime option,
4271 but it cannot be overridden. The default setting is "root".
4273 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4274 prefix string with which any file named in a -C command line option
4277 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4278 is retained for -C and -D only if the caller of Exim is root. Without
4279 it, the exim user may also use -C and -D and retain privilege.
4281 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4282 command line option is disabled.
4284 6. Macro names set by the -D option must start with an upper case letter, just
4285 like macro names defined in the configuration file.
4287 7. Added "dereference=" facility to LDAP.
4289 8. Two instances of the typo "uknown" in the source files are fixed.
4291 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4292 the Configure-Makefile script screwed up while processing it.
4294 10. Incorporated PCRE 4.4.
4296 11. The SMTP synchronization check was not operating right at the start of an
4297 SMTP session. For example, it could not catch a HELO sent before the client
4298 waited for the greeting. There is now a check for outstanding input at the
4299 point when the greeting is written. Because of the duplex, asynchronous
4300 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4301 way, but not yet received, when the check is performed.
4303 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4304 on TCP/IP sockets, because this apparently causes some broken clients to
4307 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4308 unchanged) from the Cygwin maintainer.
4310 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4311 was supported instead of testing for mbx. Effectively a typo.
4313 15. The spa authenticator server code was not checking that the input it
4314 received was valid base64.
4316 16. The debug output line for the "set" modifier in ACLs was not showing the
4317 name of the variable that was being set.
4319 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4321 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4322 lookup on its own. Something else was needed to trigger the lookup. For
4323 example, a match in host_lookup or the need for a host name in a host list.
4324 Now, if $sender_host_name is referenced and the host name has not yet been
4325 looked up, a lookup is performed. If the lookup fails, the variable remains
4326 empty, and $host_lookup_failed is set to "1".
4328 19. Added "eqi" as a case-independent comparison operator.
4330 20. The saslauthd authentication condition could segfault if neither service
4331 nor realm was specified.
4333 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4334 error message that was logged was misleading, and incoming SMTP
4335 connections were dropped. The message is now more accurate, and temporary
4336 errors are given to SMTP connections.
4338 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4339 (except RSET) with a 421 error, until QUIT is received. However, it was
4340 failing to send a response to QUIT.
4342 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4343 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4344 ACL is now run after the helo_try_verify_hosts code.
4346 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4347 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4348 case-independent, so other case variants are also recognized). Apparently
4349 some systems use these upper case variants.
4351 25. If more than two messages were waiting for the same host, and a transport
4352 filter was specified for the transport, Exim sent two messages over the
4353 same TCP/IP connection, and then failed with "socket operation on non-
4354 socket" when it tried to send the third.
4356 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4358 27. The extern definition of crypt16() in expand.c was not being excluded when
4359 the OS had its own crypt16() function.
4361 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4362 as a preferred synonym for return_size_limit, both as an option and as an
4365 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4367 30. Changed the default configuration ACL to relax the local part checking rule
4368 for addresses that are not in any local domains. For these addresses,
4369 slashes and pipe symbols are allowed within local parts, but the sequence
4370 /../ is explicitly forbidden.
4372 31. SPA server authentication was not clearing the challenge buffer before
4375 32. log_message in a "warn" ACL statement was writing to the reject log as
4376 well as to the main log, which contradicts the documentation and doesn't
4377 seem right (because no rejection is happening). So I have stopped it.
4379 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4380 However, I am unable to do any testing of this.
4382 34. Fixed an infelicity in the appendfile transport. When checking directories
4383 for a mailbox, to see if any needed to be created, it was accidentally
4384 using path names with one or more superfluous leading slashes; tracing
4385 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4387 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4388 contents are added to the log line that is written for every discarded
4389 recipient. (Previously a log_message setting was ignored.)
4391 36. The ${quote: operator now quotes the string if it is empty.
4393 37. The install script runs exim in order to find its version number. If for
4394 some reason other than non-existence or emptiness, which it checks, it
4395 could not run './exim', it was installing it with an empty version number,
4396 i.e. as "exim-". This error state is now caught, and the installation is
4399 38. An argument was missing from the function that creates an error message
4400 when Exim fails to connect to the socket for saslauthd authentication.
4401 This could cause Exim to crash, or give a corrupted message.
4403 39. Added isip, isip4, and isip6 to ${if conditions.
4405 40. The ACL variables $acl_xx are now saved with the message, and can be
4406 accessed later in routers, transports, and filters.
4408 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4409 strings in the file are not string-expanded.
4411 42. If a MAIL command specified a SIZE value that was too large to fit into an
4412 int variable, the check against message_size_limit failed. Such values are
4413 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4414 day this will have to be increased, but I don't think I want to be around
4415 when emails are that large.
4422 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4423 iconv() is not standard in FreeBSD.
4425 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4426 IPv6 enabled. The observed symptom was a segmentation fault on return from
4427 the function os_common_find_running_interfaces() in src/os.c.
4429 3. In the check_special_case() function in daemon.c I had used "errno" as an
4430 argument name, which causes warnings on some systems. This was basically a
4431 typo, since it was named "eno" in the comments!
4433 4. The code that waits for the clock to tick (at a resolution of some fraction
4434 of a second) so as to ensure message-id uniqueness was always waiting for
4435 at least one whole tick, when it could have waited for less. [This is
4436 almost certainly not relevant at current processor speeds, where it is
4437 unlikely to ever wait at all. But we try to future-proof.]
4439 5. The function that sleeps for a time interval that includes fractions of a
4440 second contained a race. It did not block SIGALRM between setting the
4441 timer, and suspending (a couple of lines later). If the interval was short
4442 and the sigsuspend() was delayed until after it had expired, the suspension
4443 never ended. On busy systems this could lead to processes getting stuck for
4446 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4447 process, before it forks any delivery processes. The open lookup caching
4448 mechanism meant that the open file or database connection was passed into
4449 the delivery process. The problem was that delivery processes always tidy
4450 up cached lookup data. This could cause a problem for the next delivery
4451 process started by the queue runner, because the external queue runner
4452 process does not know about the closure. So the next delivery process
4453 still has data in the lookup cache. In the case of a file lookup, there was
4454 no problem because closing a file descriptor in a subprocess doesn't affect
4455 the parent. However, if the lookup was caching a connection to a database,
4456 the connection was closed, and the second delivery process was likely to
4457 see errors such as "PGSQL: query failed: server closed the connection
4458 unexpectedly". The problem has been fixed by closing all cached lookups
4459 in a queue runner before running a delivery process.
4461 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4462 seem to have the "const" qualifier which it has on other OS. I've
4465 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4466 *of the same type* (client or server) with the same public name that an
4467 error should be diagnosed.
4469 9. When Exim looked up a host name for an IP address, but failed to find the
4470 original IP address when looking up the host name (a safety check), it
4471 output the message "<ip address> does not match any IP for NULL", which was
4472 confusing, to say the least. The bug was that the host name should have
4473 appeared instead of "NULL".
4475 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4476 user that is built into the binary, and the -C or -D options is used, root
4477 privilege is dropped before the configuration file is read. In addition,
4478 logging is switched to stderr instead of the normal log files. If the
4479 configuration then re-defines the Exim user, the unprivileged environment
4480 is probably not what is expected, so Exim logs a panic warning message (but
4483 However, if deliver_drop_privilege is set, the unprivileged state may well
4484 be exactly what is intended, so the warning has been cut out in that case,
4485 and Exim is allowed to try to write to its normal log files.
4491 1. smtp_return_error_details was not giving details for temporary sender
4492 or receiver verification errors.
4494 2. Diagnose a configuration error if two authenticators have the same public
4497 3. Exim used not to create the message log file for a message until the first
4498 delivery attempt. This could be confusing when incoming messages were held
4499 for policy or load reasons. The message log file is now created at the time
4500 the message is received, and an initial "Received" line is written to it.
4502 4. The automatically generated man page for command line options had a minor
4503 bug that caused no ill effects; however, a more serious problem was that
4504 the procedure for building the man page automatically didn't always
4505 operate. Consequently, release 4.20 contains an out-of-date version. This
4506 shouldn't happen again.
4508 5. When building Exim with embedded Perl support, the script that builds the
4509 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4510 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4512 6. The freeze_tell option was not being used for messages that were frozen on
4513 arrival, either by an ACL or by local_scan().
4515 7. Added the smtp_incomplete_transaction log selector.
4517 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4518 was accepting AUTH without a new EHLO.
4520 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4521 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4524 10. Logging of TCP/IP connections (when configured) now happens in the main
4525 daemon process instead of the child process, so that the TCP/IP connection
4526 count is more accurate (but it can never be perfect).
4528 11. The use of "drop" in a nested ACL was not being handled correctly in the
4529 outer ACL. Now, if condition failure induced by the nested "drop" causes
4530 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4531 or "require"), the connection is dropped.
4533 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4534 that yield "discard" can now be used with an "accept" or a "discard" verb,
4535 but an error is generated for any others (because I can't see a useful way
4536 to define what should happen).
4538 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4539 are now processed in the same way as lines in the Exim configuration file.
4540 In particular, continuation lines are supported.
4542 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4544 15. Added -ti meaning -t -i.
4546 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4547 domains, and warn by logging if others are found.
4549 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4550 returned from GIFCONF when Exim is trying to find the list of interfaces on
4551 a host. The code in os.c has been modified to copy each ifreq to an aligned
4552 structure in all cases.
4554 Also, in some cases, the returned ifreq's were being copied to a 'struct
4555 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4556 means the last couple of bytes of an IPv6 address could be chopped if the
4557 ifreq contained only a normal sockaddr (14 bytes storage).
4559 18. Named domain lists were not supported in the hosts_treat_as_local option.
4560 An entry such as +xxxx was not recognized, and was treated as a literal
4563 19. Ensure that header lines added by a DATA ACL are included in the reject log
4564 if the ACL subsequently rejects the message.
4566 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4567 MD5 (which is deprecated).
4569 21. When testing a filter file using -bf, Exim was writing a message when it
4570 took the sender from a "From " line in the message, but it was not doing so
4571 when it took $return_path from a Return-Path: header line. It now does.
4573 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4574 with a valid header line field name (a series of printing characters
4575 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4577 23. Changed "disc" in the source to "disk" to conform to the documentation and
4578 the book and for uniformity.
4580 24. Ignore Sendmail's -Ooption=value command line item.
4582 25. When execve() failed while trying to run a command in a pipe transport,
4583 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4584 could be confused with a return value of 69 from the command itself. This
4585 has been changed to 127, the value the shell returns if it is asked to run
4586 a non-existent command. The wording for the related log line suggests a
4587 non-existent command as the problem.
4589 26. If received_header_text expands to an empty string, do not add a Received:
4590 header line to the message. (Well, it adds a token one on the spool, but
4591 marks it "old" so that it doesn't get used or transmitted.)
4593 27. Installed eximstats 1.28 (addition of -nt option).
4595 28. There was no check for failure on the call to getsockname() in the daemon
4596 code. This can fail if there is a shortage of resources on the system, with
4597 ENOMEM, for example. A temporary error is now given on failure.
4599 29. Contrary to the C standard, it seems that in some environments, the
4600 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4601 program. Exim now does this explicitly; it affects the formatting of
4602 timestamps using strftime().
4604 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4605 complaints. I've now initialized all the variables, to avoid this.
4607 32. Header lines added by a system filter were not being "seen" during
4608 transport-time rewrites.
4610 33. The info_callback() function passed to OpenSSL is set up with type void
4611 (*)(SSL *, int, int), as described somewhere. However, when calling the
4612 function (actually a macro) that sets it up, the type void(*)() is
4613 expected. I've put in a cast to prevent warnings from picky compilers.
4615 34. If a DNS black list lookup found a CNAME record, but there were no A
4616 records associated with the domain it pointed at, Exim crashed.
4618 35. If a DNS black list lookup returned more than one A record, Exim ignored
4619 all but the first. It now scans all returned addresses if a particular IP
4620 value is being sought. In this situation, the contents of the
4621 $dnslist_value variable are a list of all the addresses, separated by a
4624 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4625 to accept a host name and all its aliases if the forward lookup for any of
4626 them yielded the IP address of the incoming connection. Now it accepts only
4627 those names whose forward lookup yields the correct IP address. Any other
4628 names are discarded. This closes a loophole whereby a rogue DNS
4629 administrator could create reverse DNS records to break through a
4630 wildcarded host restriction in an ACL.
4632 37. If a user filter or a system filter that ran in a subprocess used any of
4633 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4634 the wrong values were passed to the pipe command ($thisaddress had the
4635 value of $0, $0 had the value of $1, etc). This bug was introduced by
4636 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4638 38. Improved the line breaking for long SMTP error messages from ACLs.
4639 Previously, if there was no break point between 40 and 75 characters, Exim
4640 left the rest of the message alone. Two changes have been made: (a) I've
4641 reduced the minimum length to 35 characters; (b) if it can't find a break
4642 point between 35 and 75 characters, it looks ahead and uses the first one
4643 that it finds. This may give the occasional overlong line, but at least the
4644 remaining text gets split now.
4646 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4647 file descriptors might be low, and that setting 1000 would always raise it.
4648 It turns out that in some environments, the limit is already over 1000 and
4649 that lowering it causes trouble. So now Exim takes care not to decrease it.
4651 40. When delivering a message, the value of $return_path is set to $sender_
4652 address at the start of routing (routers may change the value). By an
4653 oversight, this default was not being set up when an address was tested by
4654 -bt or -bv, which affected the outcome if any router or filter referred to
4657 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4658 log only when "message" or "log_message" are set. However, if one of the
4659 conditions was an address verification, or a call to a nested ACL, the
4660 messages generated by the underlying test were being passed through. This
4661 no longer happens. The underlying message is available in $acl_verify_
4662 message for both "message" and "log_message" expansions, so it can be
4663 passed through if needed.
4665 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4666 new expansion $bh_ to give the encoded byte string without charset
4667 translation. Translation happens only if iconv() is available; HAVE_ICONV
4668 indicates this at build time. HEADERS_CHARSET gives the charset to
4669 translate to; headers_charset can change it in the configuration, and
4670 "headers charset" can change it in an individual filter file.
4672 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4673 that creates RFC 2047 encoded "words" labels them as that charset instead
4674 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4675 expansion operator; (ii) when Exim creates a From: line for a local
4676 message; (iii) when a header line is rewritten to include a "phrase" part.
4678 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4679 buggy, causing it to skip the first lines of messages whose message ID
4680 ended in 'D'. This would not have bitten before Exim release 4.14, because
4681 message IDs were unlikely to end in 'D' before then. The effect was to have
4682 incorrect size information for certain domains.
4684 45. #include "config.h" was missing at the start of the crypt16.c module. This
4685 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4688 46. If there was a timeout during a "random" callout check, Exim treated it as
4689 a failure of the random address, and carried on sending RSET and the real
4690 address. If the delay was just some slowness somewhere, the response to the
4691 original RCPT would be taken as a response to RSET and so on, causing
4692 mayhem of various kinds.
4694 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4695 when I implemented it. It didn't allow for the fact that some option values
4696 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4697 the right test for positive values.
4699 48. Domain names in DNS records are case-independent. Exim always looks them up
4700 in lower case. Some resolvers return domain names in exactly the case they
4701 appear in the zone file, that is, they may contain uppercase letters. Not
4702 all resolvers do this - some return always lower case. Exim was treating a
4703 change of case by a resolver as a change of domain, similar to a widening
4704 of a domain abbreviation. This triggered its re-routing code and so it was
4705 trying to route what was effectively the same domain again. This normally
4706 caused routing to fail (because the router wouldn't handle the domain
4707 twice). Now Exim checks for this case specially, and just changes the
4708 casing of the domain that it ultimately uses when it transmits the message
4711 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4714 50. If a filter generated a file delivery with a non-absolute name (possible if
4715 no home directory exists for the router), the forbid_file option was not
4718 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4719 the existing equality matching.
4721 52. Exim was using ints instead of ino_t variables in some places where it was
4722 dealing with inode numbers.
4724 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4725 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4726 called TMPDIR, and if it finds it is different, it changes its value.
4728 54. The smtp_printf() function is now made available to local_scan() so
4729 additional output lines can be written before returning. There is also an
4730 smtp_fflush() function to enable the detection of a dropped connection.
4731 The variables smtp_input and smtp_batched_input are exported to
4734 55. Changed the default runtime configuration: the message "Unknown user"
4735 has been removed from the ACL, and instead placed on the localuser router,
4736 using the cannot_route_message feature. This means that any verification
4737 failures that generate their own messages won't get overridden. Similarly,
4738 the "Unrouteable address" message that was in the ACL for unverifiable
4739 relay addresses has also been removed.
4741 56. Added hosts_avoid_esmtp to the smtp transport.
4743 57. The exicyclog script was not checking for the esoteric option
4744 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4745 will work only if exicyclog is run under the appropriate euid.
4747 58. Following a discussion on the list, the rules by which Exim recognises line
4748 endings on incoming messages have been changed. The -dropcr and drop_cr
4749 options are now no-ops, retained only for backwards compatibility. The
4750 following line terminators are recognized: LF CRLF CR. However, special
4751 processing applies to CR:
4753 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4754 nor a local message in the state where . is a terminator.
4756 (ii) If a bare CR is encountered in a header line, an extra space is added
4757 after the line terminator so as not to end the header. The reasoning
4758 behind this is that bare CRs in header lines are most likely either
4759 to be mistakes, or people trying to play silly games.
4761 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4762 was being incorrectly given as 18 bytes larger than it should have been.
4763 This is a VOB (very old bug).
4765 60. This may never have affected anything current, but just in case it has:
4766 When the local host is found other than at the start of a list of hosts,
4767 the local host, those with the same MX, and any that follow, are discarded.
4768 When the list in question was part of a longer list of hosts, the following
4769 hosts (not currently being processed) were also being discarded. This no
4770 longer happens. I'm not sure if this situation could ever has previously
4773 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4776 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4777 header. This is something that is recommended in a new Internet Draft, and
4778 is something that is documented as being done by Sendmail. There are two
4779 possible values. For messages generated by the autoreply transport, Exim
4782 Auto-Submitted: auto-replied
4784 whereas for all other generated messages (e.g. bounces) it adds
4786 Auto-Submitted: auto-generated
4788 63. The "personal" condition in filters now includes a test for the
4789 Auto-Submitted: header. If it contains the string "auto-" the message it
4790 not considered personal.
4792 64. Added rcpt_include_affixes as a generic transport option.
4794 65. Added queue_only_override (default true).
4796 66. Added the syslog_duplication option.
4798 67. If what should have been the first header line of a message consisted of
4799 a space followed by a colon, Exim was mis-interpreting it as a header line.
4800 It isn't of course - it is syntactically invalid and should therefore be
4801 treated as the start of the message body. The misbehaviour could have
4802 caused a number of strange effects, including loss of data in subsequent
4803 header lines, and spool format errors.
4805 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4806 client host had authenticated. This control can now be exercised by an ACL
4807 for more flexibility.
4809 69. By default, callouts do not happen when testing with -bh. There is now a
4810 variant, -bhc, which does actually run the callout code, including
4811 consulting and updating the callout cache.
4813 70. Added support for saslauthd authentication, courtesy of Alexander
4816 71. If statvfs() failed on the spool or log directories while checking their
4817 size for availability, Exim confusingly gave the error "space shortage".
4818 Furthermore, in debugging mode it crashed with a floating point exception.
4819 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4820 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4821 serious problem, Exim now writes to the main and panic logs when this
4822 happens, with details of the failure. It then refuses to accept the
4823 incoming message, giving the message "spool directory problem" or "log
4824 directory problem" with a 421 code for SMTP messages.
4826 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4827 0, 1, and 2 exist, because some OS complain for execs without them (see
4828 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4829 descriptors. However, the code omitted to check that the open succeeded,
4830 causing mysterious errors if for some reason the permissions on /dev/null
4831 got screwed. Now Exim writes a message to the main and panic logs, and
4832 bombs out if it can't open /dev/null.
4834 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4835 interact so that it is all more flexible. It is supposed to remain
4836 backwards compatible. Also added extra_local_interfaces.
4838 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4839 to bomb out with an assertion failure - to the client this appears as a
4840 connection drop. This problem occurs in the part of the code that was taken
4841 from the Samba project. Fortunately, the assertion is in a very simple
4842 function, so I have fixed this by reproducing the function inline in the
4843 one place where it is called, and arranging for authentication to fail
4844 instead of killing the process with assert().
4846 75. The SPA client code was not working when the server requested OEM rather
4847 than Unicode encoding.
4849 76. Added code to make require_files with a specific uid setting more usable in
4850 the case where statting the file as root fails - usually a non-root-mounted
4851 NFS file system. When this happens and the failure is EACCES, Exim now
4852 forks a subprocess and does the per-uid checking as the relevant uid.
4854 77. Added process_log_path.
4856 78. If log_file_path was not explicitly set, a setting of check_log_space or
4857 check_log_inodes was ignored.
4859 79. If a space check for the spool or log partitions fails, the incident is now
4860 logged. Of course, in the latter case the data may get lost...
4862 80. Added the %p formatting code to string_format() so that it can be used to
4863 print addresses in debug_print(). Adjusted all the address printing in the
4864 debugging in store.c to use %p rather than %d.
4866 81. There was a concern that a line of code in smtp_in.c could overflow a
4867 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4868 initially expressed, the concern was not well-founded, because trailing
4869 spaces are removed early. However, if the trailing spaces were followed by
4870 a NULL, they did not get removed, so the overflow was possible. Two fixes
4873 (a) I re-wrote the offending code in a cleaner fashion.
4874 (b) If an incoming SMTP command contains a NULL character, it is rejected
4877 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4878 runs initgroups(), so that if the Exim user is in any additional groups,
4879 they will be used during message reception.
4885 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob