1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.546 2008/03/27 13:23:40 tom Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TK/01 Added patch by Johannes Berg that expands the main option
10 "spamd_servers" if it starts with a dollar sign.
12 TK/02 Write list of recipients to X-Envelope-Sender header when building
13 the mbox-format spool file for content scanning (suggested by Jakob
16 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
17 (http://www.dcc-servers.net/) support via dccifd. Activated by
18 setting EXPERIMENTAL_DCC=yes in Local/Makefile. Check out
19 experimental_spec.txt for more documentation.
21 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
22 by Mark Daniel Reidel <mr@df.eu>.
24 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
25 When building exim an external PCRE library is now needed -
26 PCRE is a system library on the majority of modern systems.
27 See entry on PCRE_LIBS in EDITME file.
29 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
30 conversation. Added nologin parameter to request.
31 Patch contributed by Kirill Miazine
33 TF/01 Do not log submission mode rewrites if they do not change the address.
35 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
37 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
38 log files in place. Contributed by Roberto Lima
40 NM/04 Bugzilla 667: close socket used by dovecot authenticator
42 TF/03 Bugzilla 615: When checking the local_parts router precondition
43 after a local_part_suffix or local_part_prefix option, Exim now
44 does not use the address's named list lookup cache, since this
45 contains cached lookups for the whole local part.
47 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
48 Robert Millan. Documentation is in experimental-spec.txt
50 TF/04 Bugzilla 668: Fix parallel build (make -j).
56 TK/01 Add preliminary DKIM support. Currently requires a forked version of
57 ALT-N's libdkim that I have put here:
58 http://duncanthrax.net/exim-experimental/
60 Note to Michael Haardt: I had to rename some vars in sieve.c. They
61 were called 'true' and it seems that C99 defines that as a reserved
62 keyword to be used with 'bool' variable types. That means you could
63 not include C99-style headers which use bools without triggering
64 build errors in sieve.c.
66 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
67 as mailq or other aliases. Changed the --help handling significantly
68 to do whats expected. exim_usage() emits usage/help information.
70 SC/01 Added the -bylocaldomain option to eximstats.
72 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
74 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
76 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
82 PH/01 Another patch from the Sieve maintainer.
84 PH/02 When an IPv6 address is converted to a string for single-key lookup
85 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
86 dots are used instead of colons so that keys in lsearch files need not
87 contain colons. This was done some time before quoting was made available
88 in lsearch files. However, iplsearch files do require colons in IPv6 keys
89 (notated using the quote facility) so as to distinguish them from IPv4
90 keys. This meant that lookups for IP addresses in host lists did not work
91 for iplsearch lookups.
93 This has been fixed by arranging for IPv6 addresses to be expressed with
94 colons if the lookup type is iplsearch. This is not incompatible, because
95 previously such lookups could never work.
97 The situation is now rather anomolous, since one *can* have colons in
98 ordinary lsearch keys. However, making the change in all cases is
99 incompatible and would probably break a number of configurations.
101 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
104 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
105 conversion specification without a maximum field width, thereby enabling
106 a rogue spamd server to cause a buffer overflow. While nobody in their
107 right mind would setup Exim to query an untrusted spamd server, an
108 attacker that gains access to a server running spamd could potentially
109 exploit this vulnerability to run arbitrary code as the Exim user.
111 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
112 $primary_hostname instead of what libspf2 thinks the hosts name is.
114 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
115 a directory entry by the name of the lookup key. Previously, if a
116 symlink pointed to a non-existing file or a file in a directory that
117 Exim lacked permissions to read, a lookup for a key matching that
118 symlink would fail. Now it is enough that a matching directory entry
119 exists, symlink or not. (Bugzilla 503.)
121 PH/03 The body_linecount and body_zerocount variables are now exported in the
124 PH/04 Added the $dnslist_matched variable.
126 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
127 This means they are set thereafter only if the connection becomes
130 PH/06 Added the client_condition to authenticators so that some can be skipped
131 by clients under certain conditions.
133 PH/07 The error message for a badly-placed control=no_multiline_responses left
134 "_responses" off the end of the name.
136 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
138 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
139 (without spaces) instead of just copying the configuration text.
141 PH/10 Added the /noupdate option to the ratelimit ACL condition.
143 PH/11 Added $max_received_linelength.
145 PH/12 Added +ignore_defer and +include_defer to host lists.
147 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
148 way in which PCRE > 7.0 is built.
150 PH/14 Implemented queue_only_load_latch.
152 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
153 MAIL command. The effect was to mangle the value on 64-bit systems.
155 PH/16 Another patch from the Sieve maintainer.
157 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
159 PH/18 If a system quota error occurred while trying to create the file for
160 a maildir delivery, the message "Mailbox is full" was not appended to the
161 bounce if the delivery eventually timed out. Change 4.67/27 below applied
162 only to a quota excession during the actual writing of the file.
164 PH/19 It seems that peer DN values may contain newlines (and other non-printing
165 characters?) which causes problems in log lines. The DN values are now
166 passed through string_printing() before being added to log lines.
168 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
169 and InterBase are left for another time.)
171 PH/21 Added message_body_newlines option.
173 PH/22 Guard against possible overflow in moan_check_errorcopy().
175 PH/23 POSIX allows open() to be a macro; guard against that.
177 PH/24 If the recipient of an error message contained an @ in the local part
178 (suitably quoted, of course), incorrect values were put in $domain and
179 $local_part during the evaluation of errors_copy.
185 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
186 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
189 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
190 issue a MAIL command.
192 PH/02 In an ACL statement such as
194 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
196 if a client was not listed at all, or was listed with a value other than
197 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
198 the condition was not true (as it should be), so access was not denied.
199 The bug was that the ! inversion was incorrectly passed on to the second
200 item. This has been fixed.
202 PH/03 Added additional dnslists conditions == and =& which are different from
203 = and & when the dns lookup returns more than one IP address.
205 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
206 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
208 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
209 FSYNC, which compiles an option called disable_fsync that allows for
210 bypassing fsync(). The documentation is heavily laced with warnings.
212 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
214 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
215 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
216 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
217 including adding "make clean"; (3) Added -fPIC when compiling the test
218 dynamically loaded module, to get rid of a warning.
220 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
221 message fails, move_frozen_messages = true and ignore_bounce_errors_after
222 = 0s. The bug is otherwise harmless.
224 PH/07 There was a bug in the dovecot authenticator such that the value of
225 $auth1 could be overwritten, and so not correctly preserved, after a
226 successful authentication. This usually meant that the value preserved by
227 the server_setid option was incorrect.
229 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
231 PH/09 Installed PCRE release 7.0.
233 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
234 run for batched SMTP input. It is now run at the start of every message
235 in the batch. While fixing this I discovered that the process information
236 (output by running exiwhat) was not always getting set for -bs and -bS
237 input. This is fixed, and it now also says "batched" for BSMTP.
239 PH/11 Added control=no_pipelining.
241 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
242 patch, slightly modified), and move the expansion of helo_data till after
243 the connection is made in the smtp transport (so it can use these
246 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
248 PH/14 Added log_selector = +pid.
250 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
252 PH/16 Add ${if forany and ${if forall.
254 PH/17 Added dsn_from option to vary the From: line in DSNs.
256 PH/18 Flush SMTP output before performing a callout, unless control =
257 no_callout_flush is set.
259 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
260 was true (the default) a successful delivery failed to delete the retry
261 item, thus causing premature timeout of the address. The bug is now
264 PH/20 Added hosts_avoid_pipelining to the smtp transport.
266 PH/21 Long custom messages for fakedefer and fakereject are now split up
267 into multiline reponses in the same way that messages for "deny" and
268 other ACL rejections are.
270 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
271 with slight modification.
273 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
274 draft, changing the syntax and factoring some duplicate code".
276 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
277 for deliveries of the second and subsequent messages over the same SMTP
280 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
281 ${reduce, with only minor "tidies".
283 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
285 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
286 expansion side effects.
288 PH/27 When a message times out after an over-quota error from an Exim-imposed
289 quota, the bounce message says "mailbox is full". This message was not
290 being given when it was a system quota that was exceeded. It now should
293 MH/03 Made $recipients available in local_scan(). local_scan() already has
294 better access to the recipient list through recipients_list[], but
295 $recipients can be useful in postmaster-provided expansion strings.
297 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
298 in the case of a MAIL command with additional options following the
299 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
300 were accidentally chopped off.
302 PH/29 SMTP synchronization checks are implemented when a command is read -
303 there is a check that no more input is waiting when there shouldn't be
304 any. However, for some commands, a delay in an ACL can mean that it is
305 some time before the response is written. In this time, more input might
306 arrive, invalidly. So now there are extra checks after an ACL has run for
307 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
308 pipelining has not been advertised.
310 PH/30 MH's patch to allow iscntrl() characters to be list separators.
312 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
313 returned in the SMTP response when smtp_return_error_details was false.
316 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
317 instead of the C I/O that was originally supplied, because problems were
320 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
321 Exim which did not show up earlier: it was assuming that a call to
322 SSL_CTX_set_info_callback() might give an error value. In fact, there is
323 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
324 was a macro that became an assignment, so it seemed to work. This has
325 changed to a proper function call with a void return, hence the compile
326 error. Exim's code has been fixed.
328 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
331 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
333 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
335 PH/37 If a message is not accepted after it has had an id assigned (e.g.
336 because it turns out to be too big or there is a timeout) there is no
337 "Completed" line in the log. When some messages of this type were
338 selected by exigrep, they were listed as "not completed". Others were
339 picked up by some special patterns. I have improved the selection
340 criteria to be more general.
342 PH/38 The host_find_failed option in the manualroute router can now be set
343 to "ignore", to completely ignore a host whose IP address cannot be
344 found. If all hosts are ignored, the behaviour is controlled by the new
345 host_all_ignored option.
347 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
348 homing or because of multiple MX records with /mx) generated more than
349 one IP address, and the following item turned out to be the local host,
350 all the secondary addresses of the first item were incorrectly removed
351 from the list, along with the local host and any following hosts (which
352 is what is supposed to happen).
354 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
355 whoever called Exim into the -H file. In the case of the daemon it was
356 behaving confusingly. When first started, it used values for whoever
357 started the daemon, but after a SIGHUP it used the Exim user (because it
358 calls itself on a restart). I have changed the code so that it now always
361 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
362 message are rejected with the same error (e.g. no authentication or bad
363 sender address), and a DATA command is nevertheless sent (as can happen
364 with PIPELINING or a stupid MUA), the error message that was given to the
365 RCPT commands is included in the rejection of the DATA command. This is
366 intended to be helpful for MUAs that show only the final error to their
369 PH/42 Another patch from the Sieve maintainer.
371 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
372 Eximstats - Fixed some broken HTML links and added missing column headers
374 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
375 columns for Rejects, Temp Rejects, Ham, and Spam rows.
377 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
379 PH/43 Yet another patch from the Sieve maintainer.
381 PH/44 I found a way to check for a TCP/IP connection going away before sending
382 the response to the final '.' that terminates a message, but only in the
383 case where the client has not sent further data following the '.'
384 (unfortunately, this is allowed). However, in many cases there won't be
385 any further data because there won't be any more messages to send. A call
386 to select() can be used: if it shows that the input is "ready", there is
387 either input waiting, or the socket has been closed. An attempt to read
388 the next input character can distinguish the two cases. Previously, Exim
389 would have sent an OK response which the client would never have see.
390 This could lead to message repetition. This fix should cure that, at
391 least in a lot of common cases.
393 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
394 advertised in response to EHLO.
400 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
401 fixed by 4.65/MH/01 (is this a record?) are fixed:
403 (i) An empty string was always treated as zero by the numeric comparison
404 operators. This behaviour has been restored.
406 (ii) It is documented that the numeric comparison operators always treat
407 their arguments as decimal numbers. This was broken in that numbers
408 starting with 0 were being interpreted as octal.
410 While fixing these problems I realized that there was another issue that
411 hadn't been noticed. Values of message_size_limit (both the global option
412 and the transport option) were treated as octal if they started with 0.
413 The documentation was vague. These values are now always treated as
414 decimal, and I will make that clear in the documentation.
420 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
421 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
424 MH/01 Don't check that the operands of numeric comparison operators are
425 integers when their expansion is in "skipping" mode (fixes bug
426 introduced by 4.64-PH/07).
428 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
429 child addresses, Exim now panics and dies. Previously, because the count
430 is held in a short int, deliveries were likely to be lost. As such a
431 large number of recipients for a single message is ridiculous
432 (performance will be very, very poor), I have chosen to impose a limit
433 rather than extend the field.
439 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
440 leftover -K file (the existence of which was triggered by #402).
441 While we were at it, introduced process PID as part of the -K
442 filename. This should rule out race conditions when creating
445 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
446 processing considerably. Previous code took too long for large mails,
447 triggering a timeout which in turn triggers #401.
449 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
450 in the DK code in transports.c. sendfile() is not really portable,
451 hence the _LINUX specificness.
453 TF/01 In the add_headers option to the mail command in an Exim filter,
454 there was a bug that Exim would claim a syntax error in any
455 header after the first one which had an odd number of characters
458 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
459 callout verification, Exim cached a "reject" for the entire domain. This
460 is correct for most verifications, but it is not correct for a recipient
461 verification with use_sender or use_postmaster set, because in that case
462 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
463 case of MAIL FROM:<> rejection from other early rejections (e.g.
464 rejection of HELO). When verifying a recipient using a non-null MAIL
465 address, the cache is ignored if it shows MAIL FROM:<> rejection.
466 Whatever the result of the callout, the value of the domain cache is
467 left unchanged (for any other kind of callout, getting as far as trying
468 RCPT means that the domain itself is ok).
470 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
473 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
474 manifest itself as EPIPE rather than ECONNECT. When tidying away a
475 session, the daemon ignores ECONNECT errors and logs others; it now
476 ignores EPIPE as well.
478 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
479 (quoted-printable decoding).
481 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
482 later the small subsequent patch to fix an introduced bug.
484 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
486 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
488 PH/08 An error is now given if message_size_limit is specified negative.
490 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
491 to be given (somewhat) arbitrary names.
493 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
496 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
497 miscellaneous code fixes
499 PH/10 Added the log_reject_target ACL modifier to specify where to log
502 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
503 hostname. This is wrong, because it relates to the incoming message (and
504 probably the interface on which it is arriving) and not to the outgoing
505 callout (which could be using a different interface). This has been
506 changed to use the value of the helo_data option from the smtp transport
507 instead - this is what is used when a message is actually being sent. If
508 there is no remote transport (possible with a router that sets up host
509 addresses), $smtp_active_hostname is used.
511 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
512 tweaks were necessary in order to get it to work (see also 21 below):
513 (a) The code assumed that strncpy() returns a negative number on buffer
514 overflow, which isn't the case. Replaced with Exim's string_format()
516 (b) There were several signed/unsigned issues. I just did the minimum
517 hacking in of casts. There is scope for a larger refactoring.
518 (c) The code used strcasecmp() which is not a standard C function.
519 Replaced with Exim's strcmpic() function.
520 (d) The code set only $1; it now sets $auth1 as well.
521 (e) A simple test gave the error "authentication client didn't specify
522 service in request". It would seem that Dovecot has changed its
523 interface. Fortunately there's a specification; I followed it and
524 changed what the client sends and it appears to be working now.
526 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
529 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
530 address A is aliased to B and C, where B exists and C does not. Without
531 -v the output is "A verified" because verification stops after a
532 successful redirection if more than one address is generated. However,
533 with -v the child addresses are also verified. Exim was outputting "A
534 failed to verify" and then showing the successful verification for C,
535 with its parentage. It now outputs "B failed to verify", showing B's
536 parentage before showing the successful verification of C.
538 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
539 look up a TXT record in a specific list after matching in a combined
542 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
543 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
544 they consult the DNS. I had assumed they would set it the way they
545 wanted; and indeed my experiments on Linux seem to show that in some
546 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
547 To be on the safe side, however, I have now made the interface to
548 host_find_byname() similar to host_find_bydns(), with an argument
549 containing the DNS resolver options. The host_find_byname() function now
550 sets these options at its start, just as host_find_bydns() does. The smtp
551 transport options dns_qualify_single and dns_search_parents are passed to
552 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
553 of host_find_byname() use the default settings of RES_DEFNAMES
554 (qualify_single) but not RES_DNSRCH (search_parents).
556 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
557 spool_read_header() do less string testing, by means of a preliminary
558 switch on the second character of optional "-foo" lines. (This is
559 overdue, caused by the large number of possibilities that now exist.
560 Originally there were few.) While I was there, I also converted the
561 str(n)cmp tests so they don't re-test the leading "-" and the first
562 character, in the hope this might squeeze out yet more improvement.
564 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
565 flag allowing group syntax was set by the header_syntax check but not
566 turned off, possible causing trouble later; (2) The flag was not being
567 set at all for the header_verify test, causing "group"-style headers to
568 be rejected. I have now set it in this case, and also caused header_
569 verify to ignore an empty address taken from a group. While doing this, I
570 came across some other cases where the code for allowing group syntax
571 while scanning a header line wasn't quite right (mostly, not resetting
572 the flag correctly in the right place). These bugs could have caused
573 trouble for malformed header lines. I hope it is now all correct.
575 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
576 with the "reply" argument non-NULL. The code, however (which originally
577 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
578 but it didn't always do it. This confused somebody who was copying the
579 code for some other use. I have removed all the tests.
581 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
582 feature that was used to support insecure browsers during the U.S. crypto
583 embargo. It requires special client support, and Exim is probably the
584 only MTA that supported it -- and would never use it because real RSA is
585 always available. This code has been removed, because it had the bad
586 effect of slowing Exim down by computing (never used) parameters for the
587 RSA_EXPORT functionality.
589 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
590 authenticator to fail if there's a tab character in the incoming data
591 (there should never be unless someone is messing about, as it's supposed
592 to be base64-encoded). Also added, on Timo's advice, the "secured" option
593 if the connection is using TLS or if the remote IP is the same as the
594 local IP, and the "valid-client-cert option" if a client certificate has
597 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
598 authenticators. This can be used for authorization after authentication
599 succeeds. (In the case of plaintext, it servers for both authentication
602 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
603 if any retry times were supplied.
605 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
606 connection, where there is no client IP address to check. In this
607 situation, the verify now always succeeds.
609 PH/25 Applied John Jetmore's -Mset patch.
611 PH/26 Added -bem to be like -Mset, but loading a message from a file.
613 PH/27 In a string expansion for a processed (not raw) header when multiple
614 headers of the same name were present, leading whitespace was being
615 removed from all of them, but trailing whitespace was being removed only
616 from the last one. Now trailing whitespace is removed from each header
617 before concatenation. Completely empty headers in a concatenation (as
620 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
621 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
623 PH/29 [Removed. This was a change that I later backed out, and forgot to
624 correct the ChangeLog entry (that I had efficiently created) before
625 committing the later change.]
627 PH/30 Exim was sometimes attempting to deliver messages that had suffered
628 address errors (4xx response to RCPT) over the same connection as other
629 messages routed to the same hosts. Such deliveries are always "forced",
630 so retry times are not inspected. This resulted in far too many retries
631 for the affected addresses. The effect occurred only when there were more
632 hosts than the hosts_max_try setting in the smtp transport when it had
633 the 4xx errors. Those hosts that it had tried were not added to the list
634 of hosts for which the message was waiting, so if all were tried, there
635 was no problem. Two fixes have been applied:
637 (i) If there are any address or message errors in an SMTP delivery, none
638 of the hosts (tried or untried) are now added to the list of hosts
639 for which the message is waiting, so the message should not be a
640 candidate for sending over the same connection that was used for a
641 successful delivery of some other message. This seems entirely
642 reasonable: after all the message is NOT "waiting for some host".
643 This is so "obvious" that I'm not sure why it wasn't done
644 previously. Hope I haven't missed anything, but it can't do any
645 harm, as the worst effect is to miss an optimization.
647 (ii) If, despite (i), such a delivery is accidentally attempted, the
648 routing retry time is respected, so at least it doesn't keep
649 hammering the server.
651 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
652 in ${readsocket because some servers need this prod.
654 PH/32 Added some extra debug output when updating a wait-xxx database.
656 PH/33 The hint "could be header name not terminated by colon", which has been
657 given for certain expansion errors for a long time, was not being given
658 for the ${if def:h_colon_omitted{... case.
660 PH/34 The spec says: "With one important exception, whenever a domain list is
661 being scanned, $domain contains the subject domain." There was at least
662 one case where this was not true.
664 PH/35 The error "getsockname() failed: connection reset by peer" was being
665 written to the panic log as well as the main log, but it isn't really
666 panic-worthy as it just means the connection died rather early on. I have
667 removed the panic log writing for the ECONNRESET error when getsockname()
670 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
671 runs only) independently of the message's sender address. This meant
672 that, if the 4xx error was in fact related to the sender, a different
673 message to the same recipient with a different sender could confuse
674 things. In particualar, this can happen when sending to a greylisting
675 server, but other circumstances could also provoke similar problems.
676 I have changed the default so that the retry time for these errors is now
677 based a combination of the sender and recipient addresses. This change
678 can be overridden by setting address_retry_include_sender=false in the
681 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
682 remote server are returned as part of bounce messages. This was not
683 happening for LMTP over a pipe (the lmtp transport), but now it is the
684 same for both kinds of LMTP.
686 PH/38 Despite being documented as not happening, Exim was rewriting addresses
687 in header lines that were in fact CNAMEs. This is no longer the case.
689 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
690 and queue runs started by the daemon processed all messages. This has
691 been fixed so that -R and -S can now usefully be given with -q<time>.
693 PH/40 Import PCRE release 6.7 (fixes some bugs).
695 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
697 PH/42 Give an error if -q is specified more than once.
699 PH/43 Renamed the variables $interface_address and $interface_port as
700 $received_ip_address and $received_port, to make it clear that these
701 values apply to message reception, and not to the outgoing interface when
702 a message is delivered. (The old names remain recognized, of course.)
704 PH/44 There was no timeout on the connect() call when using a Unix domain
705 socket in the ${readsocket expansion. There now is.
707 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
708 be meaningful with "accept".
710 SC/01 Eximstats V1.43
711 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
713 SC/02 Eximstats V1.44
714 Use a glob alias rather than an array ref in the generated
715 parser. This improves both readability and performance.
717 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
718 Collect SpamAssassin and rejection statistics.
719 Don't display local sender or destination tables unless
720 there is data to show.
721 Added average volumes into the top table text output.
723 SC/04 Eximstats V1.46
724 Collect data on the number of addresses (recipients)
725 as well as the number of messages.
727 SC/05 Eximstats V1.47
728 Added 'Message too big' to the list of mail rejection
729 reasons (thanks to Marco Gaiarin).
731 SC/06 Eximstats V1.48
732 Mainlog lines which have GMT offsets and are too short to
733 have a flag are now skipped.
735 SC/07 Eximstats V1.49 (Alain Williams)
736 Added the -emptyok flag.
738 SC/08 Eximstats V1.50
739 Fixes for obtaining the IP address from reject messages.
741 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
742 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
743 whitesspace changes from 4.64-PH/27
745 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
748 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
749 are found, allow negative numbers in numeric criteria)
751 JJ/06 exipick.20061117.2, added new $message_body_missing variable
753 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
754 to match changes made in 4.64-PH/43
756 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
758 PH/47 Put in an explicit test for a DNS lookup of an address record where the
759 "domain" is actually an IP address, and force a failure. This locks out
760 those revolvers/nameservers that support "A-for-A" lookups, in
761 contravention of the specifications.
763 PH/48 When a host name was looked up from an IP address, and the subsequent
764 forward lookup of the name timed out, the host name was left in
765 $sender_host_name, contrary to the specification.
767 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
768 restricted to single-key lookups, Exim was not diagnosing an error if
769 * or *@ was used with a query-style lookup.
771 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
773 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
774 long ago, but noone interested enough thought of it. Let's just say that
775 the "1.1" means that there are some new functions that weren't there at
776 some point in the past.
778 PH/51 Error processing for expansion failure of helo_data from an smtp
779 transport during callout processing was broken.
781 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
782 tested/used via the -bh/-bhc/-bs options.
784 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
785 bug, fixed in subsequent PCRE releases).
787 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
788 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
790 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
796 SC/01 Use a glob alias rather than an array ref in eximstats generated
797 parser. This improves both readability and performance.
799 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
800 Don't display local sender or destination tables in eximstats unless
801 there is data to show.
802 Added average volumes into the eximstats top table text output.
804 SC/03 Collect data on the number of addresses (recipients) as well
805 as the number of messages in eximstats.
807 TF/01 Correct an error in the documentation for the redirect router. Exim
808 does (usually) call initgroups() when daemonizing.
810 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
811 with consistent privilege compared to when running as a daemon.
813 TF/03 Note in the spec that $authenticated_id is not set for local
814 submissions from trusted users.
816 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
817 Thanks to Dean Brooks <dean@iglou.com> for the patch.
819 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
820 by adding some example configuration directives to the default
821 configuration file. A little bit of work is required to uncomment the
822 directives and define how usernames and passwords are checked, but
823 there is now a framework to start from.
825 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
826 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
827 without this. I don't know how relevant this is to other LDAP libraries.
829 PH/02 Add the verb name to the "unknown ACL verb" error.
831 PH/03 Magnus Holmgren's patch for filter_prepend_home.
833 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
835 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
836 directory not expanded when it should be if an expanded home directory
837 was set for the address (which is overridden by the transport).
839 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
842 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
843 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
844 because it is too late at that time, and has no effect.
846 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
847 security issue with \' (bugzilla #107). I could not use the
848 PQescapeStringConn() function, because it needs a PGconn value as one of
851 PH/08 When testing addresses using -bt, indicate those final addresses that
852 are duplicates that would not cause an additional delivery. At least one
853 person was confused, thinking that -bt output corresponded to deliveries.
854 (Suppressing duplicates isn't a good idea as you lose the information
855 about possibly different redirections that led to the duplicates.)
857 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
858 systems where poll() doesn't work, in particular OS X.
860 PH/10 Added more information to debugging output for retry time not reached.
862 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
863 operations in malware.c.
865 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
868 PH/13 If write_rejectlog was set false when logging was sent to syslog with
869 syslog_duplication set false, log lines that would normally be written
870 both the the main log and to the reject log were not written to syslog at
873 PH/14 In the default configuration, change the use of "message" in ACL warn
874 statements to "add_header".
876 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
877 not followed by a command (e.g. "seen endif").
879 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
880 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
883 PH/17 Added extra conditions to the default value of delay_warning_condition
887 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
888 { match{$h_precedence:}{(?i)bulk|list|junk} } \
889 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
892 The Auto-Submitted: and various List- headers are standardised, whereas I
893 don't think Precedence: ever was.
895 PH/18 Refactored debugging code in route_finduser() to show more information,
896 in particular, the error code if getpwnam() issues one.
898 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
899 This is apparently needed in addition to the PH/07 change above to avoid
900 any possible encoding problems.
902 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
903 but not after initializing Perl.
905 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
906 output them only if debugging. By default they are written stderr,
907 apparently, which is not desirable.
909 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
912 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
915 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
917 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
918 authenticated or an ident call has been made. Suppress the default
919 values for $authenticated_id and $authenticated_sender (but permit -oMai
920 and -oMas) when testing with -bh.
922 PH/24 Re-jigged the order of the tests in the default configuration so that the
923 tests for valid domains and recipients precede the DNS black list and CSA
924 tests, on the grounds that those ones are more expensive.
926 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
927 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
928 This bug exists in every version of Exim that I still have, right back to
931 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
932 However, an attempt to turn on case-sensitivity in a regex key by
933 including (?-i) didn't work because the subject string was already
934 lowercased, and the effects were non-intuitive. It turns out that a
935 one-line patch can be used to allow (?-i) to work as expected.
941 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
942 other effects) broke the use of negated acl sub-conditions.
944 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
947 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
948 "Deny" causes Exim to reject the incoming connection with a 554 error.
949 Unfortunately, if there is a major crisis, such as a disk failure,
950 tcp-wrappers gives "deny", whereas what one would like would be some
951 kind of temporary error. A kludge has been added to help with this.
952 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
953 554 error is used if errno is still zero or contains ENOENT (which occurs
954 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
957 PH/03 Add -lutil to the default FreeBSD LIBS setting.
959 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
960 errors. Otherwise a message that provokes a temporary error (when other
961 messages do not) can cause a whole host to time out.
963 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
964 addresses were routed directly to files or pipes from a redirect router.
965 File deliveries just didn't batch; pipe deliveries might have suffered
968 PH/06 A failure to get a lock for a hints database would erroneously always say
969 "Failed to get write lock", even when it was really a read lock.
971 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
972 of 0600. This has been changed to use the value of the lockfile_mode
973 option (which defaults to 0600).
975 PH/08 Applied small patch from the Sieve maintainer.
977 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
978 folder from quota calculations, a direct delivery into this folder messed
979 up the contents of the maildirsize file. This was because the regex was
980 used only to exclude .Trash (or whatever) when the size of the mailbox
981 was calculated. There was no check that a delivery was happening into an
982 excluded directory. This bug has been fixed by ignoring all quota
983 processing for deliveries into excluded directories.
985 PH/10 Added the maildirfolder_create_regex option to appendfile.
991 PH/01 The code for finding all the local interface addresses on a FreeBSD
992 system running IPv6 was broken. This may well have applied to all BSD
993 systems, as well as to others that have similar system calls. The broken
994 code found IPv4 interfaces correctly, but gave incorrect values for the
995 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
996 that it would not match correctly against @[] and not recognize the IPv6
999 PH/02 The ipliteral router was not recognizing addresses of the form user@
1000 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1002 PH/03 Added disable_ipv6.
1004 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1005 decoded form, because it is most often used to construct To: headers
1006 lines in autoreplies, and the decoded form may well be syntactically
1007 invalid. However, $reply_address has leading white space removed, and all
1008 newlines turned into spaces so that the autoreply transport does not
1011 PH/05 If group was specified without a user on a router, and no group or user
1012 was specified on a transport, the group from the router was ignored.
1014 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1015 for visible compile-time settings that can be used to change these
1016 numbers, for those that want even more. Backwards compatibility with old
1017 spool files has been maintained. However, going back to a previous Exim
1018 release will lost any variables that are in spool files.
1020 PH/07 Two small changes when running in the test harness: increase delay when
1021 passing a TCP/IP connection to a new process, in case the original
1022 process has to generate a bounce, and remove special handling of
1023 127.0.0.2 (sic), which is no longer necessary.
1025 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1026 be the same on different OS.
1028 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1031 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1032 whether --show-vars was specified or not
1034 JJ/02 exipick: Added support for new ACL variable spool format introduced
1037 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1038 syntactically invalid From: or Reply-to: line, and a filter used this to
1039 generate an autoreply, and therefore failed to obtain an address for the
1040 autoreply, Exim could try to deliver to a non-existent relative file
1041 name, causing unrelated and misleading errors. What now happens is that
1042 it logs this as a hard delivery error, but does not attempt to create a
1045 PH/11 The exinext utility has a -C option for testing purposes, but although
1046 the given file was scanned by exinext itself; it wasn't being passed on
1047 when Exim was called.
1049 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1050 an end-of-file indication when reading a command response.
1052 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1053 compiled. In many other places in Exim, IPv6 addresses are always
1054 recognized, so I have changed this. It also means that IPv4 domain
1055 literals of the form [IPV4:n.n.n.n] are now always recognized.
1057 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1058 used if the router is not running as root, for example, when verifying at
1059 ACL time, or when using -bh. The debugging output from this situation was
1060 non-existent - all you got was a failure to exec. I have made two
1063 (a) Failures to set uid/gid, the current directory, or a process leader
1064 in a subprocess such as that created by queryprogram now generate
1065 suitable debugging ouput when -d is set.
1067 (b) The queryprogram router detects when it is not running as root,
1068 outputs suitable debugging information if -d is set, and then runs
1069 the subprocess without attempting to change uid/gid.
1071 PH/15 Minor change to Makefile for building test_host (undocumented testing
1074 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1075 additional section of a DNS packet that returns MX or SRV records.
1076 Instead, it always explicitly searches for A/AAAA records. This avoids
1077 major problems that occur when a DNS server includes only records of one
1078 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1079 fixed another bug: if SRV records were looked up and the corresponding
1080 address records were *not* found in the additional section, the port
1081 values from the SRV records were lost.
1083 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1084 using the correct key (the original address) when searching the retry
1085 rules in order to find which one to use for generating the retry hint.
1087 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1088 adding the default one. Similarly, if it contains a Reply-To: header, the
1089 errors_reply_to option, if set, is not used.
1091 PH/19 When calculating a retry time, Exim used to measure the "time since
1092 failure" by looking at the "first failed" field in the retry record. Now
1093 it does not use this if it is later than than the arrival time of the
1094 message. Instead it uses the arrival time. This makes for better
1095 behaviour in cases where some deliveries succeed, thus re-setting the
1096 "first failed" field. An example is a quota failure for a huge message
1097 when small messages continue to be delivered. Without this change, the
1098 "time since failure" will always be short, possible causing more frequent
1099 delivery attempts for the huge message than are intended.
1100 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1102 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1103 $1, $2, $3) because the numerical variables can be reset during some
1104 expansion items (e.g. "match"), thereby losing the authentication data.
1106 PH/21 Make -bV show the size of off_t variables so that the test suite can
1107 decide whether to run tests for quotas > 2G.
1109 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1110 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1111 filecount value is greater than 2G or if a quota value is greater than 2G
1112 on a system where the size of off_t is not greater than 4, a panic error
1115 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1116 never match. The debug and -bh output now contains an explicit error
1117 message indicating a malformed IPv4 address or mask.
1119 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1120 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1121 PH/23 above applies.
1123 PH/25 Do not write to syslog when running in the test harness. The only
1124 occasion when this arises is a failure to open the main or panic logs
1125 (for which there is an explicit test).
1127 PH/26 Added the /no_tell option to "control=freeze".
1129 PH/27 If a host name lookup failed very early in a connection, for example, if
1130 the IP address matched host_lookup and the reverse lookup yielded a name
1131 that did not have a forward lookup, an error message of the form "no IP
1132 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1133 could be logged. Now it outputs the IP address instead of "NULL".
1135 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1136 allows the sender and the authenticated sender to be set when
1137 submitting a message from within Exim. Since child_open_exim() is
1138 documented for local_scan(), the new function should be too.
1140 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1141 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1142 results in an empty string is now treated as unset.
1144 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1146 PH/31 Added sender_verify_fail logging option.
1148 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1149 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1150 tidied the source and removed it altogether.
1152 PH/33 When a queue run was abandoned because the load average was too high, a
1153 log line was always written; now it is written only if the queue_run log
1154 selector is set. In addition, the log line for abandonment now contains
1155 information about the queue run such as the pid. This is always present
1156 in "start" and "stop" lines but was omitted from the "abandon" line.
1158 PH/34 Omit spaces between a header name and the colon in the error message that
1159 is given when verify = headers_syntax fails (if there are lots of them,
1160 the message gets confusing).
1162 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1163 names, as there are now some PTR records that contain slashes. This check
1164 is only to protect against broken name servers that fall over on strange
1165 characters, so the fact that it applies to all lookups doesn't matter.
1167 PH/36 Now that the new test suite is complete, we can remove some of the
1168 special code in Exim that was needed for the old test suite. For example,
1169 sorting DNS records because real resolvers return them in an arbitrary
1170 order. The new test suite's fake resolver always returns records in the
1173 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1174 bounces) except when queue_only is set, to avoid logging races between
1175 the different processes.
1177 PH/38 Panic-die if .include specifies a non-absolute path.
1179 PH/39 A tweak to the "H" retry rule from its user.
1181 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1182 a label. They prevented compilation on older perls.
1184 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1185 a warning to be raised on newish perls.
1187 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1188 on queue. Changes to match documented behaviour of showing count of
1189 messages matching specified criteria.
1191 PH/40 Changed the default ident timeout from 30s to 5s.
1193 PH/41 Added support for the use of login_cap features, on those BSD systems
1194 that have them, for controlling the resources used by pipe deliveries.
1196 PH/42 The content-scanning code uses fopen() to create files in which to put
1197 message data. Previously it was not paying any attention to the mode of
1198 the files. Exim runs with umask(0) because the rest of the code creates
1199 files with open(), and sets the required mode explicitly. Thus, these
1200 files were ending up world-writeable. This was not a big issue, because,
1201 being within the spool directory, they were not world-accessible. I have
1202 created a function called modefopen, which takes an additional mode
1203 argument. It sets umask(777), creates the file, chmods it to the required
1204 mode, then resets the umask. All the relevant calls to fopen() in the
1205 content scanning code have been changed to use this function.
1207 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1208 to 24 hours. This avoids potential overflow problems when processing G
1209 and H retry rules. I suspect nobody ever tinkers with this value.
1211 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1213 PH/45 When the plaintext authenticator is running as a client, the server's
1214 challenges are checked to ensure they are valid base64 strings. By
1215 default, the authentication attempt is cancelled if an invalid string is
1216 received. Setting client_ignore_invalid_base64 true ignores these errors.
1217 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1218 they are received. Thus, the responses can be made to depend on the
1219 challenges. If an invalid string is ignored, an empty string is placed in
1222 PH/46 Messages that are created by the autoreply transport now contains a
1223 References: header, in accordance with RFCs 2822 and 3834.
1225 PH/47 Added authenticated_sender_force to the smtp transport.
1227 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1229 PH/49 Installed latest patch from the Sieve maintainer.
1231 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1232 was also set, the appendfile transport was unnecessarily scanning a
1233 directory of message files (e.g. for maildir delivery) to find the count
1234 of files (along with the size), even though it did not need this
1235 information. It now does the scan only if it needs to find either the
1236 size of the count of files.
1238 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1240 PH/52 Two bugs concerned with error handling when the smtp transport is
1243 (i) Exim was not creating retry information for temporary errors given
1244 for individual recipients after the DATA command when the smtp transport
1245 was used in LMTP mode. This meant that they could be retried too
1246 frequently, and not timed out correctly.
1248 (ii) Exim was setting the flag that allows error details to be returned
1249 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1250 recipients that were returned after the DATA command.
1252 PH/53 This is related to PH/52, but is more general: for any failing address,
1253 when detailed error information was permitted to be returned to the
1254 sender, but the error was temporary, then after the final timeout, only
1255 "retry timeout exceeded" was returned. Now it returns the full error as
1256 well as "retry timeout exceeded".
1258 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1259 do this, and (what is worse) MTAs that accept it.
1261 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1262 will now be deprecated.
1264 PH/56 New os.c-cygwin from the Cygwin maintainer.
1266 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1267 formats (previously only available in exim formats via -bpr, -bpru,
1268 and -bpra. Now also available in native and exiqgrep formats)
1270 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1271 with very large, slow to parse queues
1273 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1275 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1277 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1278 responses to authentication challenges, though it was showing the
1279 challenges; (ii) I've removed the CR characters from the debug output for
1282 PH/58 Allow for the insertion of a newline as well as a space when a string
1283 is turned into more than one encoded-word during RFC 2047 encoding. The
1284 Sieve code now uses this.
1286 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1287 data_4xx, lost_connection, tls_required.
1289 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1290 message was being sent as an SMTP response.
1292 PH/61 Add -l and -k options to exicyclog.
1294 PH/62 When verifying, if an address was redirected to one new address, so that
1295 verification continued, and the new address failed or deferred after
1296 having set something in $address_data, the value of $address_data was not
1297 passed back to the ACL. This was different to the case when no
1298 redirection occurred. The value is now passed back in both cases.
1300 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1301 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1302 use login_cap.h, so on its own it isn't the distinguishing feature. The
1303 new name refers directly to the setclassresources() function.
1305 PH/65 Added configuration files for NetBSD3.
1307 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1309 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1310 is preferred over IPv4.
1312 PH/68 The bounce_return_message and bounce_return_body options were not being
1313 honoured for bounces generated during the reception of non-SMTP messages.
1314 In particular, this applied to messages rejected by the ACL. This bug has
1315 been fixed. However, if bounce_return_message is true and bounce_return_
1316 body is false, the headers that are returned for a non-SMTP message
1317 include only those that have been read before the error was detected.
1318 (In the case of an ACL rejection, they have all been read.)
1320 PH/69 The HTML version of the specification is now built in a directory called
1321 spec_html instead of spec.html, because the latter looks like a path with
1322 a MIME-type, and this confuses some software.
1324 PH/70 Catch two compiler warnings in sieve.c.
1326 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1327 function verify_get_ident() calls ip_connect() to connect a socket, but
1328 if the "connect()" function timed out, ip_connect() used to close the
1329 socket. However, verify_get_ident() also closes the socket later, and in
1330 between Exim writes to the log, which may get opened at this point. When
1331 the socket was closed in ip_connect(), the log could get the same file
1332 descriptor number as the socket. This naturally causes chaos. The fix is
1333 not to close the socket in ip_connect(); the socket should be closed by
1334 the function that creates it. There was only one place in the code where
1335 this was missing, in the iplookup router, which I don't think anybody now
1336 uses, but I've fixed it anyway.
1338 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1339 well as to direct DNS lookups. Otherwise the handling of names in host
1340 lists is inconsistent and therefore confusing.
1346 PH/01 Two changes to the default runtime configuration:
1348 (1) Move the checks for relay_from_hosts and authenticated clients from
1349 after to before the (commented out) DNS black list checks.
1351 (2) Add control=submission to the relay_from_hosts and authenticated
1352 clients checks, on the grounds that messages accepted by these
1353 statements are most likely to be submissions.
1355 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1357 (1) Generate an error if the third argument for the ${prvs expansion is
1360 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1363 (3) Reset the variables that are obtained from the first argument of
1364 ${prvscheck and used in the second argument before leaving the code,
1365 because their memory is reclaimed, so using them afterwards may do
1368 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1369 one (it's much easier than Tom thought :-).
1371 (5) Because of (4), we can now allow for the use of $prvscheck_result
1372 inside the third argument.
1374 PH/03 For some reason, the default setting of PATH when running a command from
1375 a pipe transport was just "/usr/bin". I have changed it to
1378 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1379 anything to be listed in the output from -bV.
1381 PH/05 When a filter generated an autoreply, the entire To: header line was
1382 quoted in the delivery log line, like this:
1384 => >A.N.Other <ano@some.domain> <original@ddress> ...
1386 This has been changed so that it extracts the operative address. There
1387 may be more than one such address. If so, they are comma-separated, like
1390 => >ano@some.domain,ona@other.domain <original@ddress> ...
1392 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1393 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1394 not being looked up in the rDNS to get a host name, Exim was showing the
1395 IP address twice in Received: lines, even though the IP addresses were
1396 identical. For example:
1398 Received: from [1.2.3.4] (helo=[1.2.3.4])
1400 However, if the real host name was known, it was omitting the HELO data
1401 if it matched the actual IP address. This has been tidied up so that it
1402 doesn't show the same IP address twice.
1404 PH/07 When both +timestamp and +memory debugging was on, the value given by
1405 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1406 called by the debug printing, thereby overwriting the timestamp buffer.
1407 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1409 PH/08 When the original message was included in an autoreply transport, it
1410 always said "this is a copy of the message, including all the headers",
1411 even if body_only or headers_only was set. It now gives an appropriate
1414 PH/09 Applied a patch from the Sieve maintainer which:
1416 o fixes some comments
1417 o adds the (disabled) notify extension core
1418 o adds some debug output for the result of if/elsif tests
1419 o points to the current vacation draft in the documentation
1420 and documents the missing references header update
1424 o fixes a bug in processing the envelope test (when testing
1425 multiple envelope elements, the last element determinted the
1428 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1429 Electronic Mail") by including:
1431 Auto-submitted: auto-generated
1433 in the messages that it generates (bounce messages and others, such as
1434 warnings). In the case of bounce messages for non-SMTP mesages, there was
1435 also a typo: it was using "Auto_submitted" (underscore instead of
1436 hyphen). Since every message generated by Exim is necessarily in response
1437 to another message, thes have all been changed to:
1439 Auto-Submitted: auto-replied
1441 in accordance with these statements in the RFC:
1443 The auto-replied keyword:
1445 - SHOULD be used on messages sent in direct response to another
1446 message by an automatic process,
1448 - MUST NOT be used on manually-generated messages,
1450 - MAY be used on Delivery Status Notifications (DSNs) and Message
1451 Disposition Notifications (MDNs),
1453 - MUST NOT be used on messages generated by automatic or periodic
1454 processes, except for messages which are automatic responses to
1457 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1458 to the default Received: header definition.
1460 PH/12 Added log selector acl_warn_skipped (default on).
1462 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1463 variables because (a) they are in the wrong storage pool and (b) even if
1464 they were copied, it wouldn't work properly because of the caching.
1466 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1467 checking when decoding. Apparently there are clients that generate
1468 overlong encoded strings. Why am I not surprised?
1470 PH/15 If the first argument of "${if match_address" was not empty, but did not
1471 contain an "@" character, Exim crashed. Now it writes a panic log message
1472 and treats the condition as false.
1474 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1476 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1477 extension "envelope-auth". The code is finished and in agreement with
1478 other implementations, but there is no documentation so far and in fact,
1479 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1480 not changing the active code.
1482 Print executed "if" and "elsif" statements when debugging is used. This
1483 helps a great deal to understand what a filter does.
1485 Document more things not specified clearly in RFC3028. I had all this
1486 sorted out, when out of a sudden new issues came to my mind. Oops."
1488 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1491 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1492 canonical form (as documented). However, after a host name lookup from
1493 the IP address, check_host() was doing a simple string comparison with
1494 addresses acquired from the DNS when checking that the found name did
1495 have the original IP as one of its addresses. Since any found IPv6
1496 addresses are likely to be in abbreviated form, the comparison could
1497 fail. Luckily, there already exists a function for doing the comparison
1498 by converting both addresses to binary, so now that is used instead of
1499 the text comparison.
1501 PH/20 There was another similar case to PH/19, when a complete host name was
1502 given in a host list; looking up its IP address could give an abbreviated
1503 form, whereas the current host's name might or might not be abbreviated.
1504 The same fix has been applied.
1510 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1511 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1514 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1515 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1517 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1519 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1520 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1521 Also, for "Auto-Submitted", treat anything other than "no" as
1522 non-personal, in accordance with RFC 3834. (Previously it treated
1523 anything starting "auto-" as non-personal.)
1525 TF/01 The control=submission/name=... option had a problem with syntax
1526 errors if the name included a slash character. The /name= option
1527 now slurps the rest of the string, so it can include any characters
1528 but it must come last in the list of options (after /sender_retain
1531 PH/05 Some modifications to the interface to the fake nameserver for the new
1539 TK/01 Added the "success_on_redirect" address verification option. See
1540 NewStuff for rationale and an example.
1542 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1544 PH/02 Patch to exigrep to allow it to work on syslog lines.
1546 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1547 fread() to skip over the body file's header line, because in Cygwin the
1548 header line is locked and is inaccessible.
1550 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1551 co-exist for some time) to make it clear that it is the Exim ID that is
1552 referenced, not the Message-ID: header line.
1554 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1555 string_format() function, because snprintf() does not exist on all
1558 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1559 ${stat: expansion item.
1561 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1562 protocol synchronization error", to keep the pedants happy.
1564 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1565 well as for IRIX systems, when gcc is being used. See the host.c source
1568 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1570 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1573 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1574 transport and to the smtp transport in LMTP mode.
1576 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1578 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1579 run a filter in a subprocess. This could lead to confusion in subsequent
1580 lookups in the parent process. There should also be a search_tidyup() at
1581 the end of the subprocess.
1583 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1584 only if the host matched helo_try_verify_hosts, which caused the
1585 verification to occur when the EHLO/HELO command was issued. The ACL just
1586 tested the remembered result. Now, if a previous verification attempt has
1587 not happened, "verify = helo" does it there and then.
1589 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1591 TK/03 Fix log output including CR from clamd.
1593 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1594 exist provoked a memory error which could cause a segfault.
1596 PH/15 Installed PCRE 6.2
1598 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1600 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1601 of the problem. Specifically, suggested +O2 rather than +O1 for the
1604 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1606 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1607 record, the port was not correctly logged when the outgoing_port log
1608 selector was set (it logged the transort's default port).
1610 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1611 fallback_hosts, and "hosts" in the smtp transport.
1613 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1614 host errors such as "Connection refused".
1616 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1617 authentication with radiusclient 0.4.9:
1619 - Error returned from rc_read_config was caught wrongly
1620 - Username/password not passed on to radius server due to wrong length.
1622 The presumption is that some radiusclient API changes for 4.51/PH/17
1623 were not taken care of correctly. The code is still untested by me (my
1624 Linux distribution still has 0.3.2 of radiusclient), but it was
1625 contributed by a Radius user.
1627 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1628 expanding the "port" option of the smtp transport.
1630 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1631 while reading a MIME header. Thanks to Tom Hughes for a patch.
1633 PH/24 Include config.h inside local_scan.h so that configuration settings are
1636 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1637 that in an ACL for RCPT (for example), you can examine exactly what was
1640 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1641 commands, but it was not correctly comparing the address with the actual
1642 client host address. Thus, it would show the EHLO address in Received:
1643 header lines when this was not necessary.
1645 PH/27 Added the % operator to ${eval:}.
1647 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1648 it should be ignoring failures (because with -C, for example, it has lost
1649 privilege). It wasn't ignoring creation failures other than "already
1652 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1655 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1656 because an input line was too long, either on its own, or by virtue of
1657 too many continuations, the temporary file was not being removed, and the
1658 return code was incorrect.
1660 PH/31 Missing "BOOL" in function definition in filtertest.c.
1662 PH/32 Applied Sieve patches from the maintainer.
1664 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1666 PH/33 Added "verify = not_blind".
1668 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1669 Local/Makefile (with some defaults set). These are used in built scripts
1670 such as exicyclog, but they have never been used in the exim_install
1671 script (though there are many overriding facilities there). I have
1672 arranged that the exim_install script now takes note of these two
1675 PH/35 Installed configuration files for Dragonfly.
1677 PH/36 When a locally submitted message by a trusted user did not contain a
1678 From: header, and the sender address was obtained from -f or from an SMTP
1679 MAIL command, and the trusted user did not use -F to supply a sender
1680 name, $originator_name was incorrectly used when constructing a From:
1681 header. Furthermore, $originator_name was used for submission mode
1682 messages from external hosts without From: headers in a similar way,
1683 which is clearly wrong.
1685 PH/37 Added control=suppress_local_fixups.
1687 PH/38 When log_selector = +received_sender was set, and the addition of the
1688 sender made the log line's construction buffer exactly full, or one byte
1689 less than full, an overflow happened when the terminating "\n" was
1692 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1693 when the result of a list match is failure because a DNS lookup failed.
1695 PH/40 RM_COMMAND is now used in the building process.
1697 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1698 the "build-* directories that it finds.
1700 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1701 address in a domain literal was a prefix of an interface address.
1703 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1704 when verifying a sender address, unless rewrite_headers is false.
1706 PH/44 Wrote a long comment about why errors_to addresses are verified as
1707 recipients, not senders.
1709 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1710 the ratelimit ACL was added.
1712 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1714 PH/46 Added extra information about PostgreSQL errors to the error string.
1716 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1717 avoiding the need to install special zones in a real server. This is
1718 backwards compatible; if it can't find the fake resolver, it drops back.
1719 Thus, both old and new test suites can be run.
1721 TF/02 Added util/ratelimit.pl
1723 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1724 clock is set back in time.
1726 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1727 Candler <B.Candler@pobox.com>.
1729 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1730 OK for addresses that are the result of redirections.
1732 PH/48 A number of further additions for the benefit of the new test suite,
1733 including a fake gethostbyname() that interfaces to the fake DNS resolver
1736 TF/06 The fix for widen_domains has also been applied to qualify_single and
1737 search_parents which are the other dnslookup options that can cause
1740 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1743 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1745 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1746 service" if it encountered an MX record with an empty target hostname.
1747 The message is now "an MX or SRV record indicated no SMTP service".
1749 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1750 if the DNS of the sending site is misconfigured. This is quite a
1751 common situation. This change restores the behaviour of treating a
1752 helo verification defer as a failure.
1754 PH/51 If self=fail was set on a router, the bounce message did not include the
1755 actual error message.
1761 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1763 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1764 command itself ended in error, the underlying message about the transport
1765 filter timeout was being overwritten with the pipe command error. Now the
1766 underlying error message should be appended to the second error message.
1768 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1770 PH/02 Reduce the amount of output that "make" produces by default. Full output
1771 can still be requested.
1773 PH/03 The warning log line about a condition test deferring for a "warn" verb
1774 was being output only once per connection, rather than after each
1775 occurrence (because it was using the same function as for successful
1776 "warn" verbs). This seems wrong, so I have changed it.
1778 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1779 it should not have, which might have caused a crash in the right
1780 circumstances, but probably never did.
1782 PH/04 Installed a modified version of Tony Finch's patch to make submission
1783 mode fix the return path as well as the Sender: header line, and to
1784 add a /name= option so that you can make the user's friendly name appear
1787 TF/03 Added the control = fakedefer ACL modifier.
1789 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1790 Mark Lowes for thorough testing.
1792 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1794 TK/03 Merged latest SRS patch from Miles Wilton.
1796 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1797 with the definition in sysexits.h (which is #included earlier).
1798 Fortunately, Exim does not actually use EX_OK. The code used to try to
1799 preserve the sysexits.h value, by assumimg that macro definitions were
1800 scanned for macro replacements. I have been disabused of this notion,
1801 so now the code just undefines EX_OK before #including unistd.h.
1803 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1804 in the smtp transport. When a block could not be written in a single
1805 write() function, the timeout was being re-applied to each part-write.
1806 This seems wrong - if the receiver was accepting one byte at a time it
1807 would take for ever. The timeout is now adjusted when this happens. It
1808 doesn't have to be particularly precise.
1810 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1811 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1813 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1814 without a domain if the check to <postmaster@domain> fails.
1816 SC/01 Eximstats: added -xls and the ability to specify output files
1817 (patch written by Frank Heydlauf).
1819 SC/02 Eximstats: use FileHandles for outputing results.
1821 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1823 SC/04 Eximstats: fixed display of large numbers with -nvr option
1825 SC/05 Eximstats: fixed merging of reports with empty tables.
1827 SC/06 Eximstats: added the -include_original_destination flag
1829 SC/07 Eximstats: removed tabs and trailing whitespace.
1831 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1833 TK/06 MBOX spool code: Add real "From " MBOX separator line
1834 so the .eml file is really in mbox format (even though
1835 most programs do not really care). Patch from Alex Miller.
1837 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1838 The latter is generated from $received_to and is only set if the
1839 message has one envelope recipient. SA can use these headers,
1840 obviously out-of-the-box. Patch from Alex Miller.
1842 PH/08 The ${def test on a variable was returning false if the variable's
1843 value was "0", contrary to what the specification has always said!
1844 The result should be true unless the variable is empty.
1846 PH/09 The syntax error of a character other than { following "${if
1847 def:variable_name" (after optional whitespace) was not being diagnosed.
1848 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1849 accidental colon was present, for example, could give incorrect results.
1851 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1852 result is used (not including appendfile, where other changes are about
1855 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1856 This involved changing a lot of size variables from int to off_t. It
1857 should work with maildirs and everything.
1859 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1860 spamd dying while we are connected to it.
1862 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1865 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1866 function for BDB 4.3.
1868 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1870 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1871 the sources for PCRE have been re-arranged and more files are now
1874 PH/15 The code I had for printing potentially long long variables in PH/11
1875 above was not the best (it lost precision). The length of off_t variables
1876 is now inspected at build time, and an appropriate printing format (%ld
1877 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1878 to be "long long int" or "long int". This is needed for the internal
1879 formatting function string_vformat().
1881 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1882 the configuration file to be ":syslog", then the script "guesses" where
1883 the logs files are, rather than using the compiled in default. In our
1884 case the guess is not the same as the compiled default, so the script
1885 suddenly stopped working when I started to use syslog. The patch checks
1886 to see if log_file_path is "". If so, it attempts to read it from exim
1887 with no configuration file to get the compiled in version, before it
1888 falls back to the previous guessing code."
1890 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1891 implementing BATV in an Exim configuration. See NewStuff for the gory
1894 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1895 Makefile that are specific to HP-UX.
1897 PH/18 If the "use_postmaster" option was set for a recipient callout together
1898 with the "random" option, the postmaster address was used as the MAIL
1899 FROM address for the random test, but not for the subsequent recipient
1900 test. It is now used for both.
1902 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1903 patch removes a few documentation additions to RFC 3028, because the
1904 latest draft now contains them. It adds the new en;ascii-case comparator
1905 and a new error check for 8bit text in MIME parts. Comparator and
1906 require names are now matched exactly. I enabled the subaddress
1907 extension, but it is not well tested yet (read: it works for me)."
1909 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1910 rework some of the code of TK/09 above to avoid the hardwired use of
1911 "%lld" and "long long". Replaced the call to snprintf() with a call to
1914 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1915 records point to non-existent hosts", "retry timeout exceeded", and
1916 "retry time not reached for any host after a long failure period".
1918 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1919 experimental DomainKeys support:
1921 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1922 (2) On an error such as an illegally used "control", the wrong name for
1923 the control was given.
1925 These problems did NOT occur unless DomainKeys support was compiled.
1927 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1929 PH/24 Added ${if match_ip condition.
1931 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1932 databases so that it will be absolutely obvious if a crash occurs in the
1933 DB library. This is a regular occurrence (often caused by mis-matched
1936 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1937 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1938 picked up on a user's system that detects such things. There doesn't seem
1939 to be a gcc warning option for this - only an attribute that has to be
1940 put on the function's prototype. It seems that in Fedora Core 4 they have
1941 set this on a number of new functions. No doubt there will be more in due
1944 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1945 specify a transport. However, if an address that was verified by such a
1946 router was the subject of a callout, Exim crashed because it tried to
1947 read the rcpt_include_affixes from the non-existent transport. Now it
1948 just assumes that the setting of that option is false. This bug was
1949 introduced by 4.51/PH/31.
1951 PH/28 Changed -d+all to exclude +memory, because that information is very
1952 rarely of interest, but it makes the output a lot bigger. People tend to
1953 do -d+all out of habit.
1955 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1956 code in os-type was giving problems when libc.so lives in lib64, like on
1959 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1960 aren't the modern standard, and it seems that some systems' include files
1961 don't always have them. Exim was already checking for some of the newer
1962 ones like T_AAAA, and defining it itself. I've added checks for all the
1963 record types that Exim uses.
1965 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1966 not automatically generating a new one, as it is supposed to. This
1967 prevented TLS from working. If the file did exist, but contained invalid
1968 data, a new version was generated, as expected. It was only the case of a
1969 non-existent file that was broken.
1971 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1972 with a change in libdomainkeys > 0.64.
1974 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1975 from DNS. If the selector record carries the flag, it now has
1976 precedence over the domain-wide flag.
1978 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1980 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1981 the use of a port name that isn't defined in /etc/services) occurred, the
1982 message was deferred as in a normal delivery, and thus remained on the
1983 spool, instead of being failed because of the mua_wrapper setting. This
1984 is now fixed, and I tidied up some of the mua_wrapper messages at the
1987 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1988 the messages in a hash of arrays rather than using individual hashes.
1989 This is a bit cleaner and results in dramatic memory savings, albeit
1990 at a slight CPU cost.
1992 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1993 as requested by Marc Sherman.
1995 SC/10 Eximstats: added histograms for user specified patterns as requested
1998 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2000 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2001 fopen() in the content-scanning modules that did not already have it.
2007 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2008 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2010 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2012 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2014 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2015 to test Sieve filters that use "vacation".
2017 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2018 that changes the way the GnuTLS parameters are stored in the cache file.
2019 The new format can be generated externally. For backward compatibility,
2020 if the data in the cache doesn't make sense, Exim assumes it has read an
2021 old-format file, and it generates new data and writes a new file. This
2022 means that you can't go back to an older release without removing the
2025 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2026 work if there are any delivery delays because "one_time" forces the
2027 parent to be marked "delivered", so its unseen clone is never tried
2028 again. For this reason, Exim now forbids the simultaneous setting of
2031 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2032 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2033 entry if you want to know the details. The fix, however, neglected to
2034 consider the case when local delivery batching is involved. The test for
2035 "previously delivered" was not happening when checking to see if an
2036 address could be batched with a previous (undelivered) one; under
2037 certain circumstances this could lead to multiple deliveries to the same
2040 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2041 in its include files, and this causes problems building Exim.
2043 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2044 header_syntax) but Exim was just ignoring anything given after a slash.
2045 In particular, this caused confusion with an attempt to use "verify =
2046 reverse_host_lookup/defer_ok". An error is now given when options are
2047 supplied for verify items that do not have them. (Maybe reverse_host_
2048 lookup should have a defer_ok option, but that's a different point.)
2050 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2051 defined by RFC 821) to 2048, because there were problems with some AUTH
2052 commands, and RFC 1869 says the size should be increased for extended
2053 SMTP commands that take arguments.
2055 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2058 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2059 "unknown" error; now it says that the functionality isn't in the binary.
2061 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2062 an address' error message when a string expansion fails (syntax or
2063 whatever). Otherwise the password may appear in the log. Following change
2064 PH/42 below, there is no longer a chance of it appearing in a bounce
2067 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2069 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2070 of its addresses was ever tried. (Bugzilla bug #2.)
2072 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2073 the result incorrectly in the debug output. (It correctly added a newline
2074 to what was transported.)
2076 TF/01 Added $received_time.
2078 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2079 commented out examples of how to interface to a virus scanner and to
2080 SpamAssassin. Also added commented examples of av_scanner and
2081 spamd_address settings.
2083 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2084 and controls are allowed in which ACLs. There were a couple of minor
2085 errors. Some of the entries in the conditions table (which is a table of
2086 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2087 negation of where the condition IS allowed.
2089 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2091 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2092 header file does not have a version number, so I've had to invent a new
2093 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2094 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2095 radiusclient), but it was contributed by a Radius user.
2097 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2098 files or directories, for OpenSSL.
2100 PH/19 When an Exim process that is running as root has to create an Exim log
2101 file, it does so in a subprocess that runs as exim:exim so as to get the
2102 ownership right at creation (otherwise, other Exim processes might see
2103 the file with the wrong ownership). There was no test for failure of this
2104 fork() call, which would lead to the process getting stuck as it waited
2105 for a non-existent subprocess. Forks do occasionally fail when resources
2106 run out. I reviewed all the other calls to fork(); they all seem to check
2109 PH/20 When checking for unexpected SMTP input at connect time (before writing
2110 the banner), Exim was not dealing correctly with a non-positive return
2111 from the read() function. If the client had disconnected by this time,
2112 the result was a log entry for a synchronization error with an empty
2113 string after "input=" when read() returned zero. If read() returned -1
2114 (an event I could not check), uninitialized data bytes were printed.
2115 There were reports of junk text (parts of files, etc) appearing after
2118 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2120 PH/22 Added support for macro redefinition, and (re)definition in between
2121 driver and ACL definitions.
2123 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2124 forgetting to use the resulting value; it was using the unexpanded value.
2126 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2127 hadn't been configured. The fix is from Juergen Kreileder, who
2128 understands it better than I do:
2130 "Here's what I see happening with three configured cyrus_sasl
2131 authenticators configured (plain, login, cram-md5):
2133 On startup auth_cyrus_sasl_init() gets called for each of these.
2134 This means three calls to sasl_listmech() without a specified mech_list.
2135 => SASL tests which mechs of all available mechs actually work
2136 => three warnings about OTP not working
2137 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2139 With the patch, sasl_listmech() also gets called three times. But now
2140 SASL's mech_list option is set to the server_mech specified in the the
2141 authenticator. Or in other words, the answer from sasl_listmech()
2142 gets limited to just the mech you're testing for (which is different
2144 => the return list contains just 'plain' or 'login', 'cram-md5' or
2145 nothing depending on the value of ob->server_mech.
2147 I've just tested the patch: Authentication still works fine,
2148 unavailable mechs specified in the exim configuration are still
2149 caught, and the auth.log warnings about OTP are gone."
2151 PH/25 When debugging is enabled, the contents of the command line are added
2152 to the debugging output, even when log_selector=+arguments is not
2155 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2156 answer is "GNU", and only if the return is "GNU/something" is the answer
2159 PH/27 $acl_verify_message is now set immediately after the failure of a
2160 verification in an ACL, and so is available in subsequent modifiers. In
2161 particular, the message can be preserved by coding like this:
2163 warn !verify = sender
2164 set acl_m0 = $acl_verify_message
2166 Previously, $acl_verify_message was set only while expanding "message"
2167 and "log_message" when a very denied access.
2169 PH/28 Modified OS/os.c-Linux with
2171 -#ifndef OS_LOAD_AVERAGE
2172 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2174 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2175 nomenclature these days.)
2177 PH/29 Installed patch from the Sieve maintainer that adds the options
2178 sieve_useraddress and sieve_subaddress to the redirect router.
2180 PH/30 In these circumstances:
2181 . Two addresses routed to the same list of hosts;
2182 . First host does not offer TLS;
2183 . First host accepts first address;
2184 . First host gives temporary error to second address;
2185 . Second host offers TLS and a TLS session is established;
2186 . Second host accepts second address.
2187 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2188 and peerdn, if requested) that were in fact used only for the second
2191 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2192 attention to any local part prefix or suffix that was matched by the
2193 router that accepted the address. It now behaves in the same way as it
2194 does for delivery: the affixes are removed from the local part unless
2195 rcpt_include_affixes is set on the transport.
2197 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2198 timeout during the DATA phase of an incoming message.
2200 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2201 applied a patch sanctioned by the Sieve maintainer.
2203 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2204 the uid or gid is negative. A case of a negative gid caused this to be
2205 noticed. The fix allows for either to be negative.
2207 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2208 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2211 PH/36 The change PH/12 above was broken. Fixed it.
2213 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2214 the grounds that routing the same address twice would always produce the
2215 same answer. This might have been true once, but it is certainly no
2216 longer true now. Routing a child address may depend on the previous
2217 routing that produced that child. Some complicated redirection strategies
2218 went wrong when messages had multiple recipients, and made Exim's
2219 behaviour dependent on the order in which the addresses were given.
2221 I have moved the duplicate checking until after the routing is complete.
2222 Exim scans the addresses that are assigned to local and remote
2223 transports, and removes any duplicates. This means that more work will be
2224 done, as duplicates will always all be routed, but duplicates are
2225 presumably rare, so I don't expect this is of any significance.
2227 For deliveries to pipes, files, and autoreplies, the duplicate checking
2228 still happens during the routing process, since they are not going to be
2231 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2232 It corrects a timeout issue with spamd. This is Ian's comment: "The
2233 background is that sometimes spamd either never reads data from a
2234 connection it has accepted, or it never writes response data. The exiscan
2235 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2236 blindly assumes that writes won't block so it may never time out."
2238 PH/39 Allow G after quota size as well as K and M.
2240 PH/40 The value set for $authenticated_id in an authenticator may not contain
2241 binary zeroes or newlines because the value is written to log lines and
2242 to spool files. There was no check on this. Now the value is run through
2243 the string_printing() function so that such characters are converted to
2244 printable escape sequences.
2246 PH/41 $message_linecount is a new variable that contains the total number of
2247 lines in the message. Compare $body_linecount, which is the count for the
2250 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2251 bounce and delay warning messages, except in certain special cases, which
2254 (a) An SMTP error message from a remote host;
2255 (b) A message specified in a :fail: redirection;
2256 (c) A message specified in a "fail" command in a system filter;
2257 (d) A message specified in a FAIL return from the queryprogram router;
2258 (e) A message specified by the cannot_route_message router option.
2260 In these cases only, Exim does include the error details in bounce and
2261 warning messages. There are also a few cases where bland messages such
2262 as "unrouteable address" or "local delivery error" are given.
2264 PH/43 $value is now also set for the "else" part of a ${run expansion.
2266 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2267 being worked on, but at least Exim now implements the latest version to
2270 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2271 process to complete was treated as a delivery failure, a timeout while
2272 writing the message to the pipe was logged, but erroneously treated as a
2273 successful delivery. Such timeouts include transport filter timeouts. For
2274 consistency with the overall process timeout, these timeouts are now
2275 treated as errors, giving rise to delivery failures by default. However,
2276 there is now a new Boolean option for the pipe transport called
2277 timeout_defer, which, if set TRUE, converts the failures into defers for
2278 both kinds of timeout. A transport filter timeout is now identified in
2281 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2282 systems where "make" and "gmake" are different, calling "gmake" at top
2283 level broke things. I've arranged for the value of $(MAKE) to be passed
2284 from the Makefile to this script so that it can call the same version of
2288 A note about Exim versions 4.44 and 4.50
2289 ----------------------------------------
2291 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2292 changes of various kinds. As a consequence, a big documentation update was
2293 needed. This delayed the release for rather longer than seemed good, especially
2294 in the light of a couple of (minor) security issues. Therefore, the changes
2295 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2296 release. So 4.44 and 4.50 are in effect two different branches that both start
2299 I have left the 4.50 change log unchanged; it contains all the changes since
2300 4.43. The change log for 4.44 is below; many of its items are identical to
2301 those for 4.50. This seems to be the most sensible way to preserve the
2302 historical information.
2308 1. Minor wording change to the doc/README.SIEVE file.
2310 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2311 computation of the current number of files was incorrect.
2313 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2314 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2317 4. Give more explanation in the error message when the command for a transport
2318 filter fails to execute.
2320 5. There are several places where Exim runs a non-Exim command in a
2321 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2322 was being done only for the command run by the queryprogram router. It is
2323 now done for all such subprocesses. The other cases are: ${run, transport
2324 filters, and the commands run by the lmtp and pipe transports.
2326 6. Added CONFIGURE_GROUP build-time option.
2328 7. Some older OS have a limit of 256 on the maximum number of file
2329 descriptors. Exim was using setrlimit() to set 1000 as a large value
2330 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2331 systems. I've change it so that if it can't get 1000, it tries for 256.
2333 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2334 was an oversight, and furthermore, ever since the addition of extra
2335 controls (e.g. 4.43/32), the checks on when to allow different forms of
2336 "control" were broken. There should now be diagnostics for all cases when a
2337 control that does not make sense is encountered.
2339 9. Added the /retain_sender option to "control=submission".
2341 10. $recipients is now available in the predata ACL (oversight).
2343 11. Tidy the search cache before the fork to do a delivery from a message
2344 received from the command line. Otherwise the child will trigger a lookup
2345 failure and thereby defer the delivery if it tries to use (for example) a
2346 cached ldap connection that the parent has called unbind on.
2348 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2349 of $address_data from the recipient verification was clobbered by the
2350 sender verification.
2352 13. The value of address_data from a sender verification is now available in
2353 $sender_address_data in subsequent conditions in the ACL statement.
2355 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2357 15. Added a new option "connect=<time>" to callout options, to set a different
2360 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2361 was its contents. (It was OK if the option was not defined at all.)
2363 17. A "Completed" log line is now written for messages that are removed from
2364 the spool by the -Mrm option.
2366 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2367 information about exactly what failed.
2369 19. Added -dd to debug only the daemon process.
2371 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2372 handles timeouts, both on the server side and network timeouts. Renamed the
2373 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2375 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2376 It is now set to "smtps".
2378 22. $host_address is now set to the target address during the checking of
2379 ignore_target_hosts.
2381 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2382 being passed; this would have caused $sender_host_name to have been used if
2383 matching the list had actually called for a host name (not very likely,
2384 since this list is usually IP addresses). A host name is now passed as
2387 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2388 code that specifies a non-restarting handler (typically sigaction() in
2389 modern systems) in an attempt to fix a rare and obscure crash bug.
2391 25. Narrowed the window for a race in the daemon that could cause it to ignore
2392 SIGCHLD signals. This is not a major problem, because they are used only to
2393 wake it up if nothing else does.
2395 26. A malformed maildirsize file could cause Exim to calculate negative values
2396 for the mailbox size or file count. Odd effects could occur as a result.
2397 The maildirsize information is now recalculated if the size or filecount
2400 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2401 support for a long time. Removed HAVE_SYS_VFS_H.
2403 28. Installed the latest version of exipick from John Jetmore.
2405 29. In an address list, if the pattern was not a regular expression, an empty
2406 subject address (from a bounce message) matched only if the pattern was an
2407 empty string. Non-empty patterns were not even tested. This was the wrong
2408 because it is perfectly reasonable to use an empty address as part of a
2409 database query. An empty address is now tested by patterns that are
2410 lookups. However, all the other forms of pattern expect the subject to
2411 contain a local part and a domain, and therefore, for them, an empty
2412 address still always fails if the pattern is not itself empty.
2414 30. Exim went into a mad DNS loop when attempting to do a callout where the
2415 host was specified on an smtp transport, and looking it up yielded more
2416 than one IP address.
2418 31. Re-factored the code for checking spool and log partition space into a
2419 function that finds that data and another that does the check. The former
2420 is then used to implement four new variables: $spool_space, $log_space,
2421 $spool_inodes, and $log_inodes.
2423 32. The RFC2047 encoding function was originally intended for short strings
2424 such as real names; it was not keeping to the 75-character limit for
2425 encoded words that the RFC imposes. It now respects the limit, and
2426 generates multiple encoded words if necessary. To be on the safe side, I
2427 have increased the buffer size for the ${rfc2047: expansion operator from
2430 33. It is now permitted to omit both strings after an "if" condition; if the
2431 condition is true, the result is "true". As before, when the second string
2432 is omitted, a false condition yields an empty string. This makes it less
2433 cumbersome to write custom ACL and router conditions.
2435 34. Failure to deliver a bounce message always caused it to be frozen, even if
2436 there was an errors_to setting on the router. The errors_to setting is now
2439 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2440 canonical form (fully expanded) before being placed in
2441 $sender_host_address.
2443 36. The table in the code that translates DNS record types into text (T_A to
2444 "A" for instance) was missing entries for NS and CNAME. It is just possible
2445 that this could have caused confusion if both these types were looked up
2446 for the same domain, because the text type is used as part of Exim's
2447 per-process caching. But the chance of anyone hitting this buglet seems
2450 37. The dnsdb lookup has been extended in a number of ways.
2452 (1) There is a new type, "zns", which walks up the domain tree until it
2453 finds some nameserver records. It should be used with care.
2455 (2) There is a new type, "mxh", which is like "mx" except that it returns
2456 just the host names, not the priorities.
2458 (3) It is now possible to give a list of domains (or IP addresses) to be
2459 looked up. The behaviour when one of the lookups defers can be
2460 controlled by a keyword.
2462 (4) It is now possible to specify the separator character for use when
2463 multiple records are returned.
2465 38. The dnslists ACL condition has been extended: it is now possible to supply
2466 a list of IP addresses and/or domains to be looked up in a particular DNS
2469 39. Added log_selector=+queue_time_overall.
2471 40. When running the queue in the test harness, wait just a tad after forking a
2472 delivery process, to get repeatability of debugging output.
2474 41. Include certificate and key file names in error message when GnuTLS fails
2475 to set them up, because the GnuTLS error message doesn't include the name
2476 of the failing file when there is a problem reading it.
2478 42. Allow both -bf and -bF in the same test run.
2480 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2482 44. The "Exiscan patch" is now merged into the mainline Exim source.
2484 45. Sometimes the final signoff response after QUIT could fail to get
2485 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2486 < 0 before doing a fflush(). This bug looks as though it goes back to the
2487 introduction of TLS in release 3.20, but "sometimes" must have been rare
2488 because the tests only now provoked it.
2490 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2491 (this can affect the format of dates).
2493 47. exim_tidydb, when checking for the continued existence of a message for
2494 which it has found a message-specific retry record, was not finding
2495 messages that were in split spool directories. Consequently, it was
2496 deleting retry records that should have stayed in existence.
2498 48. Steve fixed some bugs in eximstats.
2500 49. The SPA authentication driver was not abandoning authentication and moving
2501 on to the next authenticator when an expansion was forced to fail,
2502 contradicting the general specification for all authenticators. Instead it
2503 was generating a temporary error. It now behaves as specified.
2505 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2506 (the order specifies the preference for clients). The order is now AES256,
2507 AES128, 3DES, ARCFOUR128.
2509 51. Small patch to Sieve code - explicitly set From: when generating an
2512 52. Exim crashed if a remote delivery caused a very long error message to be
2513 recorded - for instance if somebody sent an entire SpamAssassin report back
2514 as a large number of 550 error lines. This bug was coincidentally fixed by
2515 increasing the size of one of Exim's internal buffers (big_buffer) that
2516 happened as part of the Exiscan merge. However, to be on the safe side, I
2517 have made the code more robust (and fixed the comments that describe what
2520 53. Now that there can be additional text after "Completed" in log lines (if
2521 the queue_time_overall log selector is set), a one-byte patch to exigrep
2522 was needed to allow it to recognize "Completed" as not the last thing in
2525 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2526 patch that reportedly fixes this has been added. I am not expert enough to
2527 create a test for it. This is what the patch creator wrote:
2529 "I found a little strange behaviour of ldap code when working with
2530 Windows 2003 AD Domain, where users was placed in more than one
2531 Organization Units. When I tried to give exim partial DN, the exit code
2532 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2533 But simultaneously result of request was absolutely normal ldap result,
2534 so I produce this patch..."
2536 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2537 REFERENCE, so I have modified the code to exclude the patch when that macro
2540 55. Some experimental protocols are using DNS PTR records for new purposes. The
2541 keys for these records are domain names, not reversed IP addresses. The
2542 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2543 leaves it alone. Component reversal etc. now happens only for IP addresses.
2546 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2548 57. Double the size of the debug message buffer (to 2048) so that more of very
2549 long debug lines gets shown.
2551 58. The exicyclog utility now does better if the number of log files to keep
2552 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2554 59. Two changes related to the smtp_active_hostname option:
2556 (1) $smtp_active_hostname is now available as a variable.
2557 (2) The default for smtp_banner uses $smtp_active_hostname instead
2558 of $primary_hostname.
2560 60. The host_aton() function is supposed to be passed a string that is known
2561 to be a valid IP address. However, in the case of IPv6 addresses, it was
2562 not checking this. This is a hostage to fortune. Exim now panics and dies
2563 if the condition is not met. A case was found where this could be provoked
2564 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2565 components; fortuitously, this particular loophole had already been fixed
2566 by change 4.50/55 above.
2568 If there are any other similar loopholes, the new check in host_aton()
2569 itself should stop them being exploited. The report I received stated that
2570 data on the command line could provoke the exploit when Exim was running as
2571 exim, but did not say which command line option was involved. All I could
2572 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2573 running as the user.
2576 61. There was a buffer overflow vulnerability in the SPA authentication code
2577 (which came originally from the Samba project). I have added a test to the
2578 spa_base64_to_bits() function which I hope fixes it.
2581 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2582 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2584 63. The daemon start-up calls getloadavg() while still root for those OS that
2585 need the first call to be done as root, but it missed one case: when
2586 deliver_queue_load_max is set with deliver_drop_privilege. This is
2587 necessary for the benefit of the queue runner, because there is no re-exec
2588 when deliver_drop_privilege is set.
2590 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2591 This has been fixed.
2593 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2594 was in use, was not putting the data itself into the right store pool;
2595 consequently, it could be overwritten for a subsequent message in the same
2596 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2599 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2601 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2602 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2603 the function were treating the return as a boolean value, which happened to
2604 work because 0=false and not-0=true, but is not correct code.
2606 68. The host_aton() function was not handling scoped IPv6 addresses (those
2607 with, for example, "%eth0" on the end) correctly.
2609 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2610 negated items (that is, ~something) in unsigned ints. Some compilers
2611 apparently mutter when there is no cast.
2613 70. If an address verification called from an ACL failed, and did not produce a
2614 user-specific message (i.e. there was only a "system" message), nothing was
2615 put in $acl_verify_message. In this situation, it now puts the system
2618 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2619 session; change 4.31/43 added the unwanted input to the log line - except
2620 that it did not do this in the start of session case. It now does.
2622 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2623 This is wrong and can cause the other end to generate a synchronization
2624 error if it is another Exim or anything else that does the synchronization
2625 check. A QUIT command is no longer sent after a timeout.
2627 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2628 during host lookups.
2630 74. The defer_ok option of callout verification was not working if it was used
2631 when verifying addresses in header lines, that is, for this case:
2633 verify = header_sender/callout=defer_ok
2635 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2636 those file descriptors could be used for SMTP connections. If anything
2637 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2638 could be sent to the SMTP client, causing chaos. The daemon now opens
2639 stdin, stdout, and stderr to /dev/null when it puts itself into the
2642 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2643 log by default. The user can override this with suitable Perl magic.
2645 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2646 the log message when discard triggers, was not working for the DATA ACL or
2647 for the non-SMTP ACL.
2649 78. Error message wording change in sieve.c.
2651 79. If smtp_accept_max_per_host was set, the number of connections could be
2652 restricted to fewer than expected, because the daemon was trying to set up
2653 a new connection before checking whether the processes handling previous
2654 connections had finished. The check for completed processes is now done
2655 earlier. On busy systems, this bug wouldn't be noticed because something
2656 else would have woken the daemon, and it would have reaped the completed
2659 80. If a message was submitted locally by a user whose login name contained one
2660 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2661 It caused a spool format error. I have fixed the spool reading code. A
2662 related problem was that the "from" clause in the Received: line became
2663 illegal because of the space(s). It is now covered by ${quote_local_part.
2665 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2668 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2670 83. Patch from Sieve maintainer to fix unterminated string problem in
2671 "vacation" handling.
2673 84. Some minor changes to the Linux configuration files to help with other
2674 OS variants using glibc.
2676 85. One more patch for Sieve to update vacation handling to latest spec.
2679 ----------------------------------------------------
2680 See the note above about the 4.44 and 4.50 releases.
2681 ----------------------------------------------------
2687 1. Change 4.43/35 introduced a bug that caused file counts to be
2688 incorrectly computed when quota_filecount was set in an appendfile
2691 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2692 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2695 3. Give more explanation in the error message when the command for a transport
2696 filter fails to execute.
2698 4. There are several places where Exim runs a non-Exim command in a
2699 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2700 was being done only for the command run by the queryprogram router. It is
2701 now done for all such subprocesses. The other cases are: ${run, transport
2702 filters, and the commands run by the lmtp and pipe transports.
2704 5. Some older OS have a limit of 256 on the maximum number of file
2705 descriptors. Exim was using setrlimit() to set 1000 as a large value
2706 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2707 systems. I've change it so that if it can't get 1000, it tries for 256.
2709 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2710 was an oversight, and furthermore, ever since the addition of extra
2711 controls (e.g. 4.43/32), the checks on when to allow different forms of
2712 "control" were broken. There should now be diagnostics for all cases when a
2713 control that does not make sense is encountered.
2715 7. $recipients is now available in the predata ACL (oversight).
2717 8. Tidy the search cache before the fork to do a delivery from a message
2718 received from the command line. Otherwise the child will trigger a lookup
2719 failure and thereby defer the delivery if it tries to use (for example) a
2720 cached ldap connection that the parent has called unbind on.
2722 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2723 of $address_data from the recipient verification was clobbered by the
2724 sender verification.
2726 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2727 was its contents. (It was OK if the option was not defined at all.)
2729 11. A "Completed" log line is now written for messages that are removed from
2730 the spool by the -Mrm option.
2732 12. $host_address is now set to the target address during the checking of
2733 ignore_target_hosts.
2735 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2736 being passed; this would have caused $sender_host_name to have been used if
2737 matching the list had actually called for a host name (not very likely,
2738 since this list is usually IP addresses). A host name is now passed as
2741 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2742 code that specifies a non-restarting handler (typically sigaction() in
2743 modern systems) in an attempt to fix a rare and obscure crash bug.
2745 15. Narrowed the window for a race in the daemon that could cause it to ignore
2746 SIGCHLD signals. This is not a major problem, because they are used only to
2747 wake it up if nothing else does.
2749 16. A malformed maildirsize file could cause Exim to calculate negative values
2750 for the mailbox size or file count. Odd effects could occur as a result.
2751 The maildirsize information is now recalculated if the size or filecount
2754 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2755 support for a long time. Removed HAVE_SYS_VFS_H.
2757 18. Updated exipick to current release from John Jetmore.
2759 19. Allow an empty sender to be matched against a lookup in an address list.
2760 Previously the only cases considered were a regular expression, or an
2763 20. Exim went into a mad DNS lookup loop when doing a callout where the
2764 host was specified on the transport, if the DNS lookup yielded more than
2767 21. The RFC2047 encoding function was originally intended for short strings
2768 such as real names; it was not keeping to the 75-character limit for
2769 encoded words that the RFC imposes. It now respects the limit, and
2770 generates multiple encoded words if necessary. To be on the safe side, I
2771 have increased the buffer size for the ${rfc2047: expansion operator from
2774 22. Failure to deliver a bounce message always caused it to be frozen, even if
2775 there was an errors_to setting on the router. The errors_to setting is now
2778 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2779 canonical form (fully expanded) before being placed in
2780 $sender_host_address.
2782 24. Updated eximstats to version 1.33
2784 25. Include certificate and key file names in error message when GnuTLS fails
2785 to set them up, because the GnuTLS error message doesn't include the name
2786 of the failing file when there is a problem reading it.
2788 26. Expand error message when OpenSSL has problems setting up cert/key files.
2791 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2792 (this can affect the format of dates).
2794 28. exim_tidydb, when checking for the continued existence of a message for
2795 which it has found a message-specific retry record, was not finding
2796 messages that were in split spool directories. Consequently, it was
2797 deleting retry records that should have stayed in existence.
2799 29. eximstats updated to version 1.35
2800 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2801 1.35 - bugfix such that pie charts by volume are generated correctly
2803 30. The SPA authentication driver was not abandoning authentication and moving
2804 on to the next authenticator when an expansion was forced to fail,
2805 contradicting the general specification for all authenticators. Instead it
2806 was generating a temporary error. It now behaves as specified.
2808 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2809 (the order specifies the preference for clients). The order is now AES256,
2810 AES128, 3DES, ARCFOUR128.
2812 31. Small patch to Sieve code - explicitly set From: when generating an
2815 32. Exim crashed if a remote delivery caused a very long error message to be
2816 recorded - for instance if somebody sent an entire SpamAssassin report back
2817 as a large number of 550 error lines. This bug was coincidentally fixed by
2818 increasing the size of one of Exim's internal buffers (big_buffer) that
2819 happened as part of the Exiscan merge. However, to be on the safe side, I
2820 have made the code more robust (and fixed the comments that describe what
2823 33. Some experimental protocols are using DNS PTR records for new purposes. The
2824 keys for these records are domain names, not reversed IP addresses. The
2825 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2826 leaves it alone. Component reversal etc. now happens only for IP addresses.
2829 34. The host_aton() function is supposed to be passed a string that is known
2830 to be a valid IP address. However, in the case of IPv6 addresses, it was
2831 not checking this. This is a hostage to fortune. Exim now panics and dies
2832 if the condition is not met. A case was found where this could be provoked
2833 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2834 components; fortuitously, this particular loophole had already been fixed
2835 by change 4.50/55 or 4.44/33 above.
2837 If there are any other similar loopholes, the new check in host_aton()
2838 itself should stop them being exploited. The report I received stated that
2839 data on the command line could provoke the exploit when Exim was running as
2840 exim, but did not say which command line option was involved. All I could
2841 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2842 running as the user.
2845 35. There was a buffer overflow vulnerability in the SPA authentication code
2846 (which came originally from the Samba project). I have added a test to the
2847 spa_base64_to_bits() function which I hope fixes it.
2850 36. The daemon start-up calls getloadavg() while still root for those OS that
2851 need the first call to be done as root, but it missed one case: when
2852 deliver_queue_load_max is set with deliver_drop_privilege. This is
2853 necessary for the benefit of the queue runner, because there is no re-exec
2854 when deliver_drop_privilege is set.
2856 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2857 was in use, was not putting the data itself into the right store pool;
2858 consequently, it could be overwritten for a subsequent message in the same
2859 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2862 38. Sometimes the final signoff response after QUIT could fail to get
2863 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2864 < 0 before doing a fflush(). This bug looks as though it goes back to the
2865 introduction of TLS in release 3.20, but "sometimes" must have been rare
2866 because the tests only now provoked it.
2872 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2873 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2874 Now it returns an integer. A number of calls were still expecting a T/F
2875 return. Fortuitously, in all cases, the tests worked in OK situations,
2876 which is the norm. However, things would have gone wrong on any write
2877 failures on the smtp file descriptor. This function is used when sending
2878 messages over SMTP and also when doing verify callouts.
2880 2. When Exim is called to do synchronous delivery of a locally submitted
2881 message (the -odf or -odi options), it no longer closes stderr before doing
2884 3. Implemented the mua_wrapper option.
2886 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2888 5. Implemented the functions header_remove(), header_testname(),
2889 header_add_at_position(), and receive_remove_recipient(), and exported them
2892 6. If an ACL "warn" statement specified the addition of headers, Exim already
2893 inserted X-ACL-Warn: at the start if there was no header name. However, it
2894 was not making this test for the second and subsequent header lines if
2895 there were newlines in the string. This meant that an invalid header could
2896 be inserted if Exim was badly configured.
2898 7. Allow an ACL "warn" statement to add header lines at the start or after all
2899 the Received: headers, as well as at the end.
2901 8. Added the rcpt_4xx retry error code.
2903 9. Added postmaster_mailfrom=xxx to callout verification option.
2905 10. Added mailfrom=xxxx to the callout verification option, for verify=
2908 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2909 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2911 12. Inserted some casts to stop certain compilers warning when using pointer
2912 differences as field lengths or precisions in printf-type calls (mostly
2913 affecting debugging statements).
2915 13. Added optional readline() support for -be (dynamically loaded).
2917 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2918 same clock tick as a message's arrival, so that its received time was the
2919 same as the "first fail" time on the retry record, and that message
2920 remained on the queue past the ultimate address timeout, every queue runner
2921 would try a delivery (because it was past the ultimate address timeout) but
2922 after another failure, the ultimate address timeout, which should have then
2923 bounced the address, did not kick in. This was a "< instead of <=" error;
2924 in most cases the first failure would have been in the next clock tick
2925 after the received time, and all would be well.
2927 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2928 being recognized when the domain list was tested by the match_domain
2929 condition in an expansion string.
2931 16. Added the ${str2b64: operator.
2933 17. Exim was always calling setrlimit() to set a large limit for the number of
2934 processes, without checking whether the existing limit was already
2935 adequate. (It did check for the limit on file descriptors.) Furthermore,
2936 errors from getrlimit() and setrlimit() were being ignored. Now they are
2937 logged to the main and panic logs, but Exim does carry on, to try to do its
2938 job under whatever limits there are.
2940 18. Imported PCRE 5.0.
2942 19. Trivial typo in log message " temporarily refused connection" (the leading
2945 20. If the log selector return_path_on_delivery was set and an address was
2946 redirected to /dev/null, the delivery process crashed because it assumed
2947 that a return path would always be set for a "successful" delivery. In this
2948 case, the whole delivery is bypassed as an optimization, and therefore no
2951 21. Internal re-arrangement: the function for sending a challenge and reading
2952 a response while authentication was assuming a zero-terminated challenge
2953 string. It's now changed to take a pointer and a length, to allow for
2954 binary data in such strings.
2956 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2958 23. Exim was not respecting finduser_retries when seeking the login of the
2959 uid under which it was called; it was always trying 10 times. (The default
2960 setting of finduser_retries is zero.) Also, it was sleeping after the final
2961 failure, which is pointless.
2963 24. Implemented tls_on_connect_ports.
2965 25. Implemented acl_smtp_predata.
2967 26. If the domain in control=submission is set empty, Exim assumes that the
2968 authenticated id is a complete email address when it generates From: or
2969 Sender: header lines.
2971 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2972 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2973 chown and chgrp in /bin and hostname in /usr/bin.
2975 28. Exim was keeping the "process log" file open after each use, just as it
2976 does for the main log. This opens the possibility of it remaining open for
2977 long periods when the USR1 signal hits a daemon. Occasional processlog
2978 errors were reported, that could have been caused by this. Anyway, it seems
2979 much more sensible not to leave this file open at all, so that is what now
2982 29. The long-running daemon process does not normally write to the log once it
2983 has entered its main loop, and it closes the log before doing so. This is
2984 so that log files can straightforwardly be renamed and moved. However,
2985 there are a couple of unusual error situations where the daemon does write
2986 log entries, and I had neglected to close the log afterwards.
2988 30. The text of an SMTP error response that was received during a remote
2989 delivery was being truncated at 512 bytes. This is too short for some of
2990 the long messages that one sometimes sees. I've increased the limit to
2993 31. It is now possible to make retry rules that apply only when a message has a
2994 specific sender, in particular, an empty sender.
2996 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2997 it possible to be selective about when SMTP synchronization is enforced.
2999 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3001 32. Implemented hosts_connection_nolog.
3003 33. Added an ACL for QUIT.
3005 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3008 35. Added mailbox_size and mailbox_filecount to appendfile.
3010 36. Added control = no_multiline_responses to ACLs.
3012 37. There was a bug in the logic of the code that waits for the clock to tick
3013 in the case where the clock went backwards by a substantial amount such
3014 that the microsecond fraction of "now" was more than the microsecond
3015 fraction of "then" (but the whole seconds number was less).
3017 38. Added support for the libradius Radius client library this is found on
3018 FreeBSD (previously only the radiusclient library was supported).
3024 1. When certain lookups returned multiple values in the form name=value, the
3025 quoting of the values was not always being done properly. Specifically:
3026 (a) If the value started with a double quote, but contained no whitespace,
3028 (b) If the value contained whitespace other than a space character (i.e.
3029 tabs or newlines or carriage returns) it was not quoted.
3030 This fix has been applied to the mysql and pgsql lookups by writing a
3031 separate quoting function and calling it from the lookup code. The fix
3032 should probably also be applied to nisplus, ibase and oracle lookups, but
3033 since I cannot test any of those, I have not disturbed their existing code.
3035 2. A hit in the callout cache for a specific address caused a log line with no
3036 reason for rejecting RCPT. Now it says "Previous (cached) callout
3037 verification failure".
3039 3. There was an off-by-one bug in the queryprogram router. An over-long
3040 return line was truncated at 256 instead of 255 characters, thereby
3041 overflowing its buffer with the terminating zero. As well as fixing this, I
3042 have increased the buffer size to 1024 (and made a note to document this).
3044 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3045 when Exim is waiting for an SMTP response from a remote server, Exim
3046 restarts its select() call on the socket, thereby resetting its timeout.
3047 This is not a problem when such interrupts are rare. Somebody set up a cron
3048 job to run exiwhat every 2 minutes, which is less than the normal select()
3049 timeout (5 or 10 minutes). This meant that the select() timeout never
3050 kicked in because it was always reset. I have fixed this by comparing the
3051 time when an interrupt arrives with the time at the start of the first call
3052 to select(). If more time than the timeout has elapsed, the interrupt is
3053 treated as a timeout.
3055 5. Some internal re-factoring in preparation for the addition of Sieve
3056 extensions (by MH). In particular, the "personal" test is moved to a
3057 separate function, and given an option for scanning Cc: and Bcc: (which is
3058 not set for Exim filters).
3060 6. When Exim created an email address using the login of the caller as the
3061 local part (e.g. when creating a From: or Sender: header line), it was not
3062 quoting the local part when it contained special characters such as @.
3064 7. Installed new OpenBSD configuration files.
3066 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3067 try to make them clearer.
3069 9. Callout options, other than the timeout value, were being ignored when
3070 verifying sender addresses in header lines. For example, when using
3072 verify = header_sender/callout=no_cache
3074 the cache was (incorrectly) being used.
3076 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3077 only the Cygwin environment.
3079 11. When return_path_on_delivery was set as a log selector, if different remote
3080 addresses in the same message used different return paths and parallel
3081 remote delivery occurred, the wrong values would sometimes be logged.
3082 (Whenever a remote delivery process finished, the return path value from
3083 the most recently started remote delivery process was logged.)
3085 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3086 lines when AUTH and/or TLS are in use. This is the "received protocol"
3087 field. Exim used to use "asmtp" for authenticated SMTP, without any
3088 indication (in the protocol name) for TLS use. Now it follows the RFC and
3089 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3090 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3091 names appear in log lines as well as in Received: header lines.
3093 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3094 extensions, and comparison tests, and to fix some bugs.
3096 14. Changes to the "personal" filter test:
3098 (1) The test was buggy in that it was just doing the equivalent of
3099 "contains" tests on header lines. For example, if a user's address was
3100 anne@some.where, the "personal" test would incorrectly be true for
3102 To: susanne@some.where
3104 This test is now done by extracting each address from the header in turn,
3105 and checking the entire address. Other tests that are part of "personal"
3106 are now done using regular expressions (for example, to check local parts
3107 of addresses in From: header lines).
3109 (2) The list of non-personal local parts in From: addresses has been
3110 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3111 taken from the Sieve specification recommendations.
3113 (3) If the message contains any header line starting with "List-" it is
3114 treated as non-personal.
3116 (4) The test for "circular" in the Subject: header line has been removed
3117 because it now seems ill-conceived.
3119 15. Minor typos in src/EDITME comments corrected.
3121 16. Installed latest exipick from John Jetmore.
3123 17. If headers_add on a router specified a text string that was too long for
3124 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3125 of string_sprintf() is now avoided.
3127 18. $message_body_size was not set (it was always zero) when running the DATA
3128 ACL and the local_scan() function.
3130 19. For the "mail" command in an Exim filter, no default was being set for
3131 the once_repeat time, causing a random time value to be used if "once" was
3132 specified. (If the value happened to be <= 0, no repeat happened.) The
3133 default is now 0s, meaning "never repeat". The "vacation" command was OK
3134 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3135 (I found it when inspecting the code).
3137 20. There is now an overall timeout for performing a callout verification. It
3138 defaults to 4 times the callout timeout, which applies to individual SMTP
3139 commands during the callout. The overall timeout applies when there is more
3140 than one host that can be tried. The timeout is checked before trying the
3141 next host. This prevents very long delays if there are a large number of
3142 hosts and all are timing out (e.g. when the network connections are timing
3143 out). The value of the overall timeout can be changed by specifying an
3144 additional sub-option for "callout", called "maxwait". For example:
3146 verify = sender/callout=5s,maxwait=20s
3148 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3149 to the end before writing, but this should make it even safer).
3151 22. Exim was forgetting that it had advertised PIPELINING for the second and
3152 subsequent messages on an SMTP connection. It was also not resetting its
3153 memory on STARTTLS and an internal HELO.
3155 23. When Exim logs an SMTP synchronization error within a session, it now
3156 records whether PIPELINING has been advertised or not.
3158 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3159 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3160 rather than long int.
3162 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3164 26. Added the never_mail option to autoreply.
3170 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3171 crash if the getsockname() call failed; this can happen if a connection is
3172 closed very soon after it is established. The problem was simply in the
3173 order in which certain operations were done, causing Exim to try to write
3174 to the SMTP stream before it had set up the file descriptor. The bug has
3175 been fixed by making things happen in the correct order.
3181 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3182 before the connection was closed, thus losing the rejection response.
3184 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3185 some early Solaris releases, but causes trouble in current releases where
3186 socklen_t is defined.
3188 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3191 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3194 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3195 that releasing the top of it at the end releases what was used for sub-
3196 expansions (unless the block got too big). However, discard this block if
3197 the first thing is a variable or header, so that we can use its block when
3198 it is dynamic (useful for very large $message_headers, for example).
3200 6. Lookups now cache *every* query, not just the most recent. A new, separate
3201 store pool is used for this. It can be recovered when all lookup caches are
3202 flushed. Lookups now release memory at the end of their result strings.
3203 This has involved some general refactoring of the lookup sources.
3205 7. Some code has been added to the store_xxx() functions to reduce the amount
3206 of flapping under certain conditions.
3208 8. log_incoming_interface used to affect only the <= reception log lines. Now
3209 it causes the local interface and port to be added to several more SMTP log
3210 lines, for example "SMTP connection from", and rejection lines.
3212 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3214 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3216 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3217 could be overwritten at the end of the current message (or the start of a
3218 new message if it was set in a HELO ACL). The value is now preserved for
3219 the duration of the SMTP connection.
3221 12. If a transport had a headers_rewrite setting, and a matching header line
3222 contained an unqualified address, that address was qualified, even if it
3223 did not match any rewriting rules. The underlying bug was that the values
3224 of the flags that permit the existence of unqualified sender and recipient
3225 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3226 non-local messages, and by -bnq for local messages) were not being
3227 preserved with the message after it was received.
3229 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3230 "next input=" as part of the text comprising the host identity instead of
3231 the correct text. The code was using the same buffer for two different
3232 strings. However, depending on which order the printing function evaluated
3233 its arguments, the bug did not always show up. Under Linux, for example, my
3234 test suite worked just fine.
3236 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3237 doesn't work with some older versions of Perl. It has been changed to "my",
3238 which in any case is probably the better facility to use.
3240 15. A really picky compiler found some instances of statements for creating
3241 error messages that either had too many or two few arguments for the format
3244 16. The size of the buffer for calls to the DNS resolver has been increased
3245 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3246 for addresses that have a lot of PTR records. This alleviates a problem; it
3247 does not fully solve it.
3249 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3250 buffer now truncates the list and logs the incident, which is the same
3251 action as happens when Exim is looking up a host name and its aliases.
3252 Previously in this situation something unpredictable would happen;
3253 sometimes it was "internal error: store_reset failed".
3255 18. If a server dropped the connection unexpectedly when an Exim client was
3256 using GnuTLS and trying to read a response, the client delivery process
3257 crashed while trying to generate an error log message.
3259 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3260 string, for example:
3262 warn message = H1: something\nH2: something
3264 the text was added as a single header line from Exim's point of view
3265 though it ended up OK in the delivered message. However, searching for the
3266 second and subsequent header lines using $h_h2: did not work. This has been
3267 fixed. Similarly, if a system filter added multiple headers in this way,
3268 the routers could not see them.
3270 20. Expanded the error message when iplsearch is called with an invalid key to
3271 suggest using net-iplsearch in a host list.
3273 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3274 ACLs are no longer actually imposed (and a message to that effect is
3277 22. If a "gecos" field in a passwd entry contained escaped characters, in
3278 particular, if it contained a \" sequence, Exim got it wrong when building
3279 a From: or a Sender: header from that name. A second bug also caused
3280 incorrect handling when an unquoted " was present following a character
3281 that needed quoting.
3283 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3284 was not being matched caselessly.
3286 24. Arranged for all hyphens in the exim.8 source to be escaped with
3289 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3290 properly. Recipient callout cache records were still being keyed to include
3291 the sender, even when use_sender was set false. This led to far more
3292 callouts that were necessary. The sender is no longer included in the key
3293 when use_sender is false.
3295 26. Added "control = submission" modifier to ACLs.
3297 27. Added the ${base62d: operator to decode base 62 numbers.
3299 28. dnsdb lookups can now access SRV records.
3301 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3302 the configuration file.
3304 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3305 (-v) mode. This makes the output for a verbose queue run more intelligible.
3307 31. Added a use_postmaster feature to recipient callouts.
3309 32. Added the $body_zerocount variable, containing the number of binary zero
3310 bytes in the message body.
3312 33. The time of last modification of the "new" subdirectory is now used as the
3313 "mailbox time last read" when there is a quota error for a maildir
3316 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3318 35. Added +ignore_unknown as a special item in host lists.
3320 36. Code for decoding IPv6 addresses in host lists is now included, even if
3321 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3322 address was recognized as an IP address, but was then not correctly decoded
3323 into binary, causing unexpected and incorrect effects when compared with
3330 1. Very minor rewording of debugging text in manualroute to say "list of
3331 hosts" instead of "hostlist".
3333 2. If verify=header_syntax was set, and a header line with an unqualified
3334 address (no domain) and a large number of spaces between the end of the
3335 name and the colon was received, the reception process suffered a buffer
3336 overflow, and (when I tested it) crashed. This was caused by some obsolete
3337 code that should have been removed. The fix is to remove it!
3339 3. When running in the test harness, delay a bit after writing a bounce
3340 message to get a bit more predictability in the log output.
3342 4. Added a call to search_tidyup() just before forking a reception process. In
3343 theory, someone could use a lookup in the expansion of smtp_accept_max_
3344 per_host which, without the tidyup, could leave open a database connection.
3346 5. Added the variables $recipient_data and $sender_data which get set from a
3347 lookup success in an ACL "recipients" or "senders" condition, or a router
3348 "senders" option, similar to $domain_data and $local_part_data.
3350 6. Moved the writing of debug_print from before to after the "senders" test
3353 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3354 problems for message scanning, either using a data ACL, or using
3355 local_scan() because the Received: header was not generated till after they
3356 were called (in order to set the time as the time of reception completion).
3357 I have revised the way this works. The header is now generated after the
3358 body is received, but before the ACL or local_scan() are called. After they
3359 are run, the timestamp in the header is updated.
3365 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3366 before starting a queue runner without re-exec. This happened only when
3367 deliver_drop_privilege was set or when the Exim user was set to root. The
3368 effect of the bug was that timeouts during subsequent deliveries caused
3369 crashes instead of being properly handled. The handler is now left at its
3370 default (and expected) setting.
3372 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3373 message, again when deliver_drop_privilege is set or Exim is run as root.
3374 The bug described in (1) was not present in this case, but the tidying up
3375 of the other signals was missing. I have made the two cases consistent.
3377 3. The ignore_target_hosts setting on a manualroute router was being ignored
3378 for hosts that were looked up using the /MX notation.
3380 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3383 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3384 operated on the sender address. After changing the $sender_address to <>
3385 for the sender address verify, Exim was re-instated it as the original
3386 (before rewriting) address, but remembering that it had rewritten it, so it
3387 wasn't rewriting it again. This bug also had the effect of breaking the
3388 sender address verification caching when the sender address was rewritten.
3390 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3391 This has been changed so that if the ip literal address matches
3392 ignore_target_hosts, the router declines.
3394 7. Added expansion conditions match_domain, match_address, and match_local_
3395 part (NOT match_host).
3397 8. The placeholder for the Received: header didn't have a length field set.
3399 9. Added code to Exim itself and to exim_lock to test for a specific race
3400 condition that could lead to file corruption when using MBX delivery. The
3401 issue is with the lockfile that is created in /tmp. If this file is removed
3402 after a process has opened it but before that process has acquired a lock,
3403 there is the potential for a second process to recreate the file and also
3404 acquire a lock. This could lead to two Exim processes writing to the file
3405 at the same time. The added code performs the same test as UW imapd; it
3406 checks after acquiring the lock that its file descriptor still refers to
3407 the same named file.
3409 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3410 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3413 11. Added the smtp_active_hostname option. If used, this will typically be made
3414 to depend on the incoming interface address. Because $interface_address is
3415 not set up until the daemon has forked a reception process, error responses
3416 that can happen earlier (such as "too many connections") no longer contain
3419 12. If an expansion in a condition on a "warn" statement fails because a lookup
3420 defers, the "warn" statement is abandoned, and the next ACL statement is
3421 processed. Previously this caused the whole ACL to be aborted.
3423 13. Added the iplsearch lookup type.
3425 14. Added ident_timeout as a log selector.
3427 15. Added tls_certificate_verified as a log selector.
3429 16. Added a global option tls_require_ciphers (compare the smtp transport
3430 option of the same name). This controls incoming TLS connections.
3432 17. I finally figured out how to make tls_require_ciphers do a similar thing
3433 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3434 before starting the TLS session.
3436 18. Tabs are now shown as \t in -bP output.
3438 19. If the log selector return_path_on_delivery was set, Exim crashed when
3439 bouncing a message because it had too many Received: header lines.
3441 20. If two routers both had headers_remove settings, and the first one included
3442 a superfluous trailing colon, the final name in the first list and the
3443 first name in the second list were incorrectly joined into one item (with a
3444 colon in the middle).
3450 1. Added -C and -D options to the exinext utility, mainly to make it easier
3451 to include in the automated testing, but these could be helpful when
3452 multiple configurations are in use.
3454 2. The exinext utility was not formatting the output nicely when there was
3455 an alternate port involved in the retry record key, nor when there was a
3456 message id as well (for retries that were specific to a specific message
3457 and a specific host). It was also confused by IPv6 addresses, because of
3458 the additional colons they contain. I have fixed the IPv4 problem, and
3459 patched it up to do a reasonable job for IPv6.
3461 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3462 delivery, the log line now contains "pipelined" if PIPELINING was used.
3464 4. An SMTP transport process used to panic and die if the bind() call to set
3465 an explicit outgoing interface failed. This has been changed; it is now
3466 treated in the same way as a connect() failure.
3468 5. A reference to $sender_host_name in the part of a conditional expansion
3469 that was being skipped was still causing a DNS lookup. This no longer
3472 6. The def: expansion condition was not recognizing references to header lines
3473 that used bh_ and bheader_.
3475 7. Added the _cache feature to named lists.
3477 8. The code for checking quota_filecount in the appendfile transport was
3478 allowing one more file than it should have been.
3480 9. For compatibility with Sendmail, the command line option
3488 and sets the incoming protocol and host name (for trusted callers). The
3489 host name and its colon can be omitted when only the protocol is to be set.
3490 Note the Exim already has two private options, -pd and -ps, that refer to
3491 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3492 "s", but I don't think that's a major issue.
3494 10. A number of refactoring changes to the code, none of which should affect
3497 (a) The number of logging options was getting close to filling up the
3498 32-bit word that was used as a bit map. I have split them into two classes:
3499 those that are passed in the argument to log_write(), and those that are
3500 only ever tested independently outside of that function. These are now in
3501 separate 32-bit words, so there is plenty of room for expansion again.
3502 There is no change in the user interface or the logging behaviour.
3504 (b) When building, for example, log lines, the code previously used a
3505 macro that called string_cat() twice, in order to add two strings. This is
3506 not really sufficiently general. Furthermore, there was one instance where
3507 it was actually wrong because one of the argument was used twice, and in
3508 one call a function was used. (As it happened, calling the function twice
3509 did not affect the overall behaviour.) The macro has been replaced by a
3510 function that can join an arbitrary number of extra strings onto a growing
3513 (c) The code for expansion conditions now uses a table and a binary chop
3514 instead of a serial search (which was left over from when there were very
3515 few conditions). Also, it now recognizes conditions like "pam" even when
3516 the relevant support is not compiled in: a suitably worded error message is
3517 given if an attempt is made to use such a condition.
3519 11. Added ${time_interval:xxxxx}.
3521 12. A bug was causing one of the ddress fields not to be passed back correctly
3522 from remote delivery subprocesses. The field in question was not being
3523 subsequently used, so this caused to problems in practice.
3525 13. Added new log selectors queue_time and deliver_time.
3527 14. Might have fixed a bug in maildirsizefile handling that threw up
3528 "unexpected character" debug warnings, and recalculated the data
3529 unnecessarily. In any case, I expanded the warning message to give more
3532 15. Added the message "Restricted characters in address" to the statements in
3533 the default ACL that block characters like @ and % in local parts.
3535 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3536 Three changes have been made:
3538 (a) There was a serious bug; a negative response to MAIL caused the whole
3539 recipient domain to be cached as invalid, thereby blocking all messages
3540 to all local parts at the same domain, from all senders. This bug has
3541 been fixed. The domain is no longer cached after a negative response to
3542 MAIL if the sender used is not empty.
3544 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3547 (c) A new callout option, "use_sender" has been added for people who want
3548 the modified behaviour.
3554 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3557 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3558 indeed breaks things for older releases.
3560 3. Added additional logging to the case where there is a problem reading data
3561 from a filter that is running in a subprocess using a pipe, in order to
3562 try to track down a specific problem.
3564 4. Testing facility fudge: when running in the test harness and attempting
3565 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3566 getting "No route to host". Convert this to a timeout.
3568 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3571 6. Some OS don't have socklen_t but use size_t instead. This affects the
3572 fifth argument of getsockopt() amongst other things. This is now
3573 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3574 can be set for individual OS. I have set it for SunOS5, OSF1, and
3575 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3576 some earlier ones do not.
3578 7. Change 4.30/15 was not doing the test caselessly.
3580 8. The standard form for an IPv6 address literal was being rejected by address
3581 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3582 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3583 this, as well as the form without the "IPv6" on the front (but only when
3584 address literals are enabled, of course).
3586 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3588 10. Exim crashed if a message with an empty sender address specified by -f
3589 encountered a router with an errors_to setting. This could be provoked only
3590 by a command such as
3594 where an empty string was supplied; "<>" did not hit this bug.
3596 11. Installed PCRE release 4.5.
3598 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3599 remained set. It is now erased.
3601 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3602 times from message ids (which are base 36 rather than the normal 62).
3604 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3605 were being counted as actual protocol errors, and logged if the log
3606 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3607 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3608 and DATA following a set of rejected RCPTs do not count as protocol errors.
3609 In other words, Exim assumes they were pipelined, though this may not
3610 actually be the case. Of course, in all cases the client gets an
3611 appropriate error code.
3613 15. If a lookup fails in an ACL condition, a message about the failure may
3614 be available; it is used if testing the ACL cannot continue, because most
3615 such messages specify what the cause of the deferral is. However, some
3616 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3617 that caused an old message to be retained and used if a later statement
3618 caused a defer, replacing the real cause of the deferral.
3620 16. If an IP address had so many PTR records that the DNS lookup buffer
3621 was not large enough to hold them, Exim could crash while trying to process
3622 the truncated data. It now detects and logs this case.
3624 17. Further to 4.21/58, another change has been made: if (and only if) the
3625 first line of a message (the first header line) ends with CRLF, a bare LF
3626 in a subsequent header line has a space inserted after it, so as not to
3627 terminate the header.
3629 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3630 unnecessarily, used atoi() instead of strtol(), and didn't check the
3631 termination when getting file sizes from file names by regex.
3633 19. Completely re-implemented the support for maildirsize files, in the light
3634 of a number of problems with the previous contributed implementation
3635 (4.30/29). In particular:
3637 . If the quota is zero, the maildirsize file is maintained, but no quota is
3640 . If the maildir directory does not exist, it is created before any attempt
3641 to write a maildirsize file.
3643 . The quota value in the file is just a cache; if the quota is changed in
3644 the transport, the new value overrides.
3646 . A regular expression is available for excluding directories from the
3649 20. The autoreply transport checks the characters in options that define the
3650 message's headers; it allows continued headers, but it was checking with
3651 isspace() after an embedded newline instead of explicitly looking for a
3654 21. If all the "regular" hosts to which an address was routed had passed their
3655 expiry times, and had not reached their retry times, the address was
3656 bounced, even if fallback hosts were defined. Now Exim should go on to try
3659 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3660 equivalent code in the SMTP transport. Some hosts send humungous responses
3661 to HELO/EHLO, more than 1024 it seems.
3663 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3664 gives compiler warnings in some environments. I've now done it "properly",
3667 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3668 (because of problems with the built-in one) was declared to return uschar *
3669 instead of char *, causing compiler failure.
3671 25. Fixed a file descriptor leak when processing alias/forward files.
3673 26. Fixed a minor format string issue in dbfn.c.
3675 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3677 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3678 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3681 29. When a sender address is verified, it is cached, to save repeating the test
3682 when there is more than one recipient in a message. However, when the
3683 verification involves a callout, it is possible for different callout
3684 options to be set for different recipients. It is too complicated to keep
3685 track of this in the cache, so now Exim always runs a verification when a
3686 callout is required, relying on the callout cache for the optimization.
3687 The overhead is duplication of the address routing, but this should not be
3690 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3691 to be verified with callout=postmaster, and the main callout worked but the
3692 postmaster check failed, the verification correctly failed. However, if a
3693 subsequent RCPT command asked for sender verification *without* the
3694 postmaster check, incorrect caching caused this verification also to fail,
3697 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3698 it was not caching the DNS options (qualify_single, search_parents) that
3699 were used when the lookup failed. A subsequent lookup with different
3700 options therefore always gave the same answer, though there were cases
3701 where it should not have. (Example: a "domains = !$mx_any" option on a
3702 dnslookup router: the "domains" option is always processed without any
3703 widening, but the router might have qualify_single set.) Now Exim uses the
3704 cached value only when the same options are set.
3706 32. Added John Jetmore's "exipick" utility to the distribution.
3708 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3709 than a timeout (e.g. a certificate is required, and is not provided), an
3710 Exim server now closes the connection immediately. Previously it waited for
3711 the client to close - but if the client is SSL, it seems that they each
3712 wait for each other, leading to a delay before one of them times out.
3714 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3715 maintained 0.8.x compatibility because I don't think many are using it, and
3716 it is clearly obsolete.
3718 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3721 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3722 client certificate was expired. A simple patch fixes this, though I don't
3723 understand the full logic of why the verify callback is called multiple
3726 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3727 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3728 which causes problems with some clients (such as the Certicom SSL Plus
3729 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3730 disables the coutermeasure allowing Eudora to connect."
3732 38. Exim was not checking that a write() to a log file succeeded. This could
3733 lead to Bad Things if a log got too big, in particular if it hit a file
3734 size limit. Exim now panics and dies if it cannot write to a log file, just
3735 as it does if it cannot open a log file.
3737 39. Modified OS/Makefile-Linux so that it now contains
3739 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3741 The two -D definitions ensure that Exim is compiled with large file
3742 support, which makes it possible to handle log files that are bigger than
3745 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3746 instance) a domain was checked against a named list that involved a lookup,
3747 causing $domain_data to be set, then another domain was checked against the
3748 same list, then the first domain was re-checked, the value of $domain_data
3749 after the final check could be wrong. In particular, if the second check
3750 failed, it could be set empty. This bug probably also applied to
3753 41. The strip_trailing_dot option was not being applied to the address given
3754 with the -f command-line option.
3756 42. The code for reading a message's header from the spool was incrementing
3757 $received_count, but never initializing it. This meant that the value was
3758 incorrect (doubled) while delivering a message in the same process in which
3759 it was received. In the most common configuration of Exim, this never
3760 happens - a fresh exec is done - but it can happen when
3761 deliver_drop_privilege is set.
3763 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3764 it now includes up to 150 characters of the unexpected data in the log
3767 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3768 and building data strings. The size of both of these buffers was 10 000
3769 bytes - far larger than anybody would *ever* want, thought I. Needless to
3770 say, somebody hit the limit. I have increased the maximum line length to
3771 20 000 and the maximum data length of concatenated lines to 100 000. I have
3772 also fixed two bugs, because there was no checking on these buffers. Tsk,
3773 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3774 buffer is too small.
3776 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3777 lsearch lookups. Now it does.
3779 46. When parsing a route_list item in a manualroute router, a fixed-length
3780 buffer was used for the list of hosts. I made this 1024 bytes long,
3781 thinking that nobody would ever have a list of hosts that long. Wrong.
3782 Somebody had a whole pile of complicated expansion conditions, and the
3783 string was silently truncated, leading to an expansion error. It turns out
3784 that it is easier to change to an unlimited length (owing to other changes
3785 that have happened since this code was originally written) than to build
3786 structure for giving a limitation error. The length of the item that
3787 expands into the list of hosts is now unlimited.
3789 47. The lsearch lookup could not handle data where the length of text line was
3790 more than 4095 characters. Such lines were truncated, leading to shortened
3791 data being returned. It should now handle lines of any length.
3793 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3794 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3797 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3798 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3799 no longer happens in comment lines. A list of replacements is now placed
3800 at the head of all of the source files, except those whose only change is
3801 to replace PERL_COMMAND in the very first #! line.
3803 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3804 messages on the queue, with a bottom-up merge sort, using code contributed
3805 by Michael Haardt. This should make operations like -bp somewhat faster on
3806 large queues. It won't affect queue runners, except when queue_run_in_order
3809 51. Installed eximstats 1.31 in the distribution.
3811 52. Added support for SRV lookups to the dnslookup router.
3813 53. If an ACL referred to $message_body or $message_body_end, the value was not
3814 reset for any messages that followed in the same SMTP session.
3816 54. The store-handling optimization for building very long strings was not
3817 differentiating between the different store pools. I don't think this
3818 actually made any difference in practice, but I've tidied it.
3820 55. While running the routers to verify a sender address, $sender_address
3821 was still set to the sender address. This is wrong, because when routing to
3822 send a bounce to the sender, it would be empty. Therefore, I have changed
3823 it so that, while verifying a sender address, $sender_address is set to <>.
3824 (There is no change to what happens when verifying a recipient address.)
3826 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3827 target A or AAAA records (if not already returned) without resetting the
3828 qualify_single or search_parents options of the DNS resolver. These are
3829 inappropriate in this case because the targets of MX and SRV records must
3830 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3831 target that, when qualified, matched something in the local domain. These
3832 two options are now turned off when doing these lookups.
3834 57. It seems that at least some releases of Reiserfs (which does not have the
3835 concept of a fixed number of inodes) returns zero and not -1 for the
3836 number of available inodes. This interacted badly with check_spool_inodes,
3837 which assumed that -1 was the "no such thing" setting. What I have done is
3838 to check that the total number of inodes is greater than zero before doing
3839 the test of how many are available.
3841 58. When a "warn" ACL statement has a log_message modifier, the message is
3842 remembered, and not repeated. This is to avoid a lot of repetition when a
3843 message has many recipients that cause the same warning to be written.
3844 Howewer, Exim was preserving the list of already written lines for an
3845 entire SMTP session, which doesn't seem right. The memory is now reset if a
3846 new message is started.
3848 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3849 debugging output unless log_rewrite was also set.
3851 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3852 of (int)(handle) when we know that handle contains (void *)(-1).
3854 61. The Exim daemon panic-logs an error return when it closes the incoming
3855 connection. However "connection reset by peer" seems to be common, and
3856 isn't really an error worthy of noting specially, so that particular error
3859 62. When Exim is trying to find all the local interfaces, it used to panic and
3860 die if the ioctl to get the interface flags failed. However, it seems that
3861 on at least one OS (Solaris 9) it is possible to have an interface that is
3862 included in the list of interfaces, but for which you get a failure error
3863 for this call. This happens when the interface is not "plumbed" into a
3864 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3865 failure of the "get flags" call assumes that the interface is down.
3867 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3868 makes life easier for people who are doing arithmetic on fields extracted
3869 from dates, where you often get leading zeros that should not be
3870 interpreted as octal.
3872 64. Added qualify_domain to the redirect router, to override the global
3875 65. If a pathologically long header line contained very many addresses (the
3876 report of this problem mentioned 10 000) and each of them was rewritten,
3877 Exim could use up a very large amount of memory. (It kept on making new
3878 copies of the header line as it rewrote, and never released the old ones.)
3879 At the expense of a bit more processing, the header rewriting function has
3880 been changed so that it no longer eats memory in this way.
3882 66. The generation of the Received: header has been moved from the time that a
3883 message starts to be received, to the time that it finishes. The timestamp
3884 in the Received: header should now be very close to that of the <= log
3885 line. There are two side-effects of this change:
3887 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3888 logged header lines no longer include the local Received: line, because
3889 it has not yet been created. The same applies to a copy of the message
3890 that is returned to a non-SMTP sender when a message is rejected.
3892 (b) When a filter file is tested using -bf, no additional Received: header
3893 is added to the test message. After some thought, I decided that this
3896 This change does not affect the value of $received_for. It is still set
3897 after address rewriting, but before local_scan() is called.
3899 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3901 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3902 gave an unhelpful panic error message, and a defer error. I have managed to
3903 change this behaviour so that it now rejects any supplied certificate,
3904 which seems right, as the list of acceptable certificates is empty.
3906 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3907 gave an unhelpful defer error. I have not managed to make this reject any
3908 supplied certificates, but the error message it gives is "no certificate
3909 supplied", which is not helpful.
3911 70. exigrep's output now also includes lines that are not associated with any
3912 message, but which match the given pattern. Implemented by a patch from
3913 Martin Sluka, which also tidied up the Perl a bit.
3915 71. Recipient callout verification, like sender verification, was using <> in
3916 the MAIL FROM command. This isn't really the right thing, since the actual
3917 sender may affect whether the remote host accepts the recipient or not. I
3918 have changed it to use the actual sender in the callout; this means that
3919 the cache record is now keyed on a recipient/sender pair, not just the
3920 recipient address. There doesn't seem to be a real danger of callout loops,
3921 since a callout by the remote host to check the sender would use <>.
3922 [SEE ABOVE: changed after hitting problems.]
3924 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3925 temporary errors. However, in the case of such a code being given after
3926 the end of a data transmission (i.e. after ".") Exim was failing to write
3927 a retry record for the message. (Yes, there was some broken host that was
3928 actually sending 8xx at this point.)
3930 73. An unknown lookup type in a host list could cause Exim to panic-die when
3931 the list was checked. (An example that provoked this was putting <; in the
3932 middle of a list instead of at the start.) If this happened during a DATA
3933 ACL check, a -D file could be left lying around. This kind of configuration
3934 error no longer causes Exim to die; instead it causes a defer errror. The
3935 incident is still logged to the main and panic logs.
3937 74. Buglet left over from Exim 3 conversion. The message "too many messages
3938 in one connection" was written to the rejectlog but not the mainlog, except
3939 when address rewriting (yes!) was being logged.
3941 75. Added write_rejectlog option.
3943 76. When a system filter was run not as root (that is, when system_filter_user
3944 was set), the values of the $n variables were not being returned to the
3945 main process; thus, they were not subsequently available in the $sn
3948 77. Added +return_path_on_delivery log selector.
3950 78. A connection timeout was being treated differently from recipients deferred
3951 when testing hosts_max_try with a message that was older than the host's
3952 retry timeout. (The host should not be counted, thus allowing all hosts to
3953 be tried at least once before bouncing.) This may have been the cause of an
3954 occasionally reported bug whereby a message would remain on the queue
3955 longer than the retry timeout, but would be bounced if a delivery was
3956 forced. I say "may" because I never totally pinned down the problem;
3957 setting up timeout/retry tests is difficult. See also the next item.
3959 79. The ultimate address timeout was not being applied to errors that involved
3960 a combination of host plus message (for example, a timeout on a MAIL
3961 command). When an address resolved to a number of possible hosts, and they
3962 were not all tried for each delivery (e.g. because of hosts_max_try), a
3963 message could remain on the queue longer than the retry timeout.
3965 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3968 81. Fixed an obscure SMTP outgoing bug which required at least the following
3969 conditions: (a) there was another message waiting for the same server;
3970 (b) the server returned 5xx to all RCPT commands in the first message so
3971 that the message was not completed; (c) the server dropped the connection
3972 or gave a negative response to the RSET that Exim sends to abort the
3973 transaction. The observed case was a dropped connection after DATA that had
3974 been sent in pipelining mode. That is, the server had advertised PIPELINING
3975 but was not implementing it correctly. The effect of the bug was incorrect
3976 behaviour, such as trying another host, and this could lead to a crash.
3982 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3983 and daemon.c were passed as pointers to ints; they should have been
3984 pointers to socklen_t variables (which are typically unsigned ints).
3986 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3989 3. Fixed a really odd bug that affected only the testing scheme; patching a
3990 certain fixed string in the binary changed the value of another string that
3991 happened to be identical to the end of the original first string.
3993 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3994 name", it returns that address as the IP address. On some operating
3995 systems (e.g. Solaris), it also passes back the IP address string as the
3996 "host name". However, on others (e.g. Linux), it passes back an empty
3997 string. Exim wasn't checking for this, and was changing the host name to an
3998 empty string, assuming it had been canonicized.
4000 5. Although rare, it is permitted to have more than one PTR record for a given
4001 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4002 all the names associated with an address, because they do in Solaris.
4003 However, it seems that they do not in Linux for data that comes from the
4004 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4005 I found this out when I moved to a new Linux workstation and tried to run
4006 the Exim test suite.
4008 To get round this problem I have changed the code so that it now does its
4009 own call to the DNS to look up PTR records when searching for a host name.
4010 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4011 addresses that are only in /etc/hosts are still found.
4013 This behaviour is, however, controlled by an option called host_lookup_
4014 order, which defaults to "bydns:byaddr". If people want to use the other
4015 order, or indeed, just use one or the other means of lookup, they can
4016 specify it in this variable.
4018 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4019 some operating systems, this comes back from gethostbyaddr() as an empty
4020 string, and this is what Exim used to test for. However, it seems that in
4021 other systems, "." is yielded. Exim now tests for this case too.
4023 7. The values of check_spool_space and check_log_space are now held internally
4024 as a number of kilobytes instead of an absolute number of bytes. If a
4025 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4026 kilobyte. This means that much larger values can be stored.
4028 8. Exim monitor: an attempt to get the action menu when not actually pointing
4029 at a message produces an empty menu entitled "No message selected". This
4030 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4031 no entries in it ("Shell widget menu has zero width and/or height"). So I
4032 have added a single, blank menu entry in this case.
4034 9. Added ${quote_local_part.
4036 10. MIME decoding is now applied to the contents of Subject: header lines when
4039 11. Now that a reference to $sender_host_address automatically causes a reverse
4040 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4041 host lookup before query-style lookups in lists that might use this
4042 variable. This has therefore been abolished, and the "net-" prefix is no
4043 longer necessary for query-style lookups.
4045 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4046 have been a typo for LFLAGS, so it has been changed.
4048 13. The install script calls Exim with "-C /dev/null" in order to find the
4049 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4050 to be output. Howeve, since Exim outputs its version number before the
4051 error, it didn't break the script. It just looked ugly. I fixed this by
4052 always allowing "-C /dev/null" if the caller is root.
4054 14. Ignore overlarge ACL variable number when reading spool file - insurance
4055 against a later release with more variables having written the file.
4057 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4058 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4059 this, as well as the form without the "IPv6" on the front.
4061 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4062 OS/Makefile-Darwin file.
4064 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4065 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4067 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4068 variable. However, some OS use ints for inodes. I've added cast to long int
4069 to get rid of the compiler warning.
4071 19. I had forgotten to lock out "/../" in configuration file names when
4072 ALT_CONFIG_PREFIX was set.
4074 20. Routers used for verification do not need to specify transports. However,
4075 if such a router generated a host list, and callout was configured, Exim
4076 crashed, because it could not find a port number from the (non-existent)
4077 transport. It now assumes port 25 in this circumstance.
4079 21. Added the -t option to exigrep.
4081 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4082 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4083 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4084 them is set, LOOKUP_LSEARCH is forced.
4086 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4088 24. Added sender and host information to the "rejected by local_scan()" log
4089 line; previously there was no indication of these.
4091 25. Added .include_if_exists.
4093 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4094 Linux. It turns out that not all file systems support this. Apparently some
4095 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4096 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4097 not supported on the file descriptor, is now ignored when Exim is trying to
4098 sync a directory. This applies only to Linux.
4100 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4102 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4103 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4106 29. Added support for maildirsize files from supplied patch (modified a bit).
4108 30. The use of :fail: followed by an empty string could lead Exim to respond to
4109 sender verification failures with (e.g.):
4111 550 Verification failed for <xxx>
4112 550 Sender verify failed
4114 where the first response line was missing the '-' that indicates it is not
4115 the final line of the response.
4117 31. The loop for finding the name of the user that called Exim had a hardwired
4118 limit of 10; it now uses the value of finduser_retries, which is used for
4119 all other user lookups.
4121 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4124 33. Exim was neglecting to zero errno before one call of strtol() when
4125 expanding a string and expecting an integer value. On some systems this
4126 resulted in spurious "integer overflow" errors. Also, it was casting the
4127 result into an int without checking.
4129 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4130 did not work. The code looks as if it has *never* worked, though it appears
4131 to have been documented since at least releast 1.62. I have made it work.
4133 35. The "timeout_DNS" error in retry rules, also documented since at least
4134 1.62, also never worked. As it isn't clear exactly what this means, and
4135 clearly it isn't a major issue, I have abolished the feature by treating it
4136 as "timeout", and writing a warning to the main and panic logs.
4138 36. The display of retry rules for -brt wasn't always showing the error code
4141 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4142 timeout_connect_A, timeout_connect_MX.
4144 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4145 to the empty sender.
4147 39. The daemon was not analysing the content of -oX till after it had closed
4148 stderr and disconnected from the controlling terminal. This meant that any
4149 syntax errors were only noted on the panic log, and the return code from
4150 the command was 0. By re-arranging the code a little, I've made the
4151 decoding happen first, so such errors now appear on stderr, and the return
4152 code is 1. However, the actual setting up of the sockets still happens in
4153 the disconnected process, so errors there are still only recorded on the
4156 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4157 connections (as happens on some IP stacks) was logged at start up time as
4158 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4159 it from "IPv6 and IPv4", which means that two separate sockets are being
4162 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4163 says whether AF_INET or AF_INET6 was passed as an argument.
4165 42. Exiwhat output was messed up when time zones were included in log
4168 43. Exiwhat now gives more information about the daemon's listening ports,
4169 and whether -tls-on-connect was used.
4171 44. The "port" option of the smtp transport is now expanded.
4173 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4174 silently ignored. Now an error message is written to the main and panic
4177 46. There's a new ACL modifier called "logwrite" which writes to a log file
4178 as soon as it is encountered.
4180 47. Added $local_user_uid and $local_user_gid at routing time.
4182 48. Exim crashed when trying to verify a sender address that was being
4185 49. Exim was recognizing only a space character after ".include". It now also
4186 recognizes a tab character.
4188 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4189 extracting the relevant information from the specification. The man page no
4190 longer contains scrambled data for the -d option, and I've added a section
4191 at the front about calling Exim under different names.
4193 51. Added "extra_headers" argument to the "mail" command in filter files.
4195 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4198 53. Installed eximstats 1.29.
4200 54. Added transport_filter_timeout as a generic transport option.
4202 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4203 Cc: header lines. This was required by RFC 822, but it not required by RFC
4206 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4207 incoming messages that did not have them. Now it does so only if the
4208 message originates locally, that is, if there is no associated remote host
4209 address. When Resent- header lines are present, this applies to the Resent-
4210 lines rather than the non-Resent- lines.
4212 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4213 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4215 58. Messages for configuration errors now include the name of the main
4216 configuration file - useful now that there may be more than one file in a
4217 list (.included file names were always shown).
4219 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4220 for those rare installations that do not start the daemon as root or run it
4221 setuid root. I've cut out the call to initgroups() if the daemon is not
4224 60. The Exim user and group can now be bound into the binary as text strings
4225 that are looked up at the start of Exim's processing.
4227 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4229 62. Added $mailstore_basename variable.
4231 63. Installed patch to sieve.c from Michael Haardt.
4233 64. When Exim failed to open the panic log after failing to open the main log,
4234 the original message it was trying to log was written to stderr and debug
4235 output, but if they were not available (the usual case in production), it
4236 was lost. Now it is written to syslog before the two lines that record the
4237 failures to open the logs.
4239 65. Users' Exim filters run in subprocesses under the user's uid. It is
4240 possible for a "deliver" command or an alias in a "personal" command to
4241 provoke an address rewrite. If logging of address rewriting is configured,
4242 this fails because the process is not running as root or exim. There may be
4243 a better way of dealing with this, but for the moment (because 4.30 needs
4244 to be released), I have disabled address rewrite logging when running a
4245 filter in a non-root, non-exim process.
4251 1. The buildconfig auxiliary program wasn't quoting the value set for
4252 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4253 not defined. This bug was masked in 4.22 by the effect that was fixed in
4256 2. Some messages that were rejected after a message id was allocated were
4257 shown as "incomplete" by exigrep. It no longer does this for messages that
4258 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4260 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4261 have allow_domain_literals set, the ID did not get logged in the <= line.
4262 Domain literals are now always recognized in Message-ID: header lines.
4264 4. The first argument for a ${extract expansion item is the key name or field
4265 number. Leading and trailing spaces in this item were not being ignored,
4266 causing some misleading effects.
4268 5. When deliver_drop_privilege was set, single queue runner processes started
4269 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4270 same command in the process it spins off) were not dropping privilege.
4272 6. When the daemon running as "exim" started a queue runner, it always
4273 re-executed Exim in the spun-off process. This is a waste of effort when
4274 deliver_drop_privilege is set. The new process now just calls the
4275 queue-runner function directly.
4281 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4284 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4285 ignored. Though the use of -oP was forcing the writing of a pid file, it
4286 was always written to the default place.
4288 3. If the message "no IP address found for host xxxx" is generated during
4289 incoming verification, it is now followed by identification of the incoming
4290 connection (so you can more easily find what provoked it).
4292 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4294 5. Added some features to "harden" Exim a bit more against certain attacks:
4296 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4297 be put in Local/Makefile. This is like the never_users runtime option,
4298 but it cannot be overridden. The default setting is "root".
4300 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4301 prefix string with which any file named in a -C command line option
4304 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4305 is retained for -C and -D only if the caller of Exim is root. Without
4306 it, the exim user may also use -C and -D and retain privilege.
4308 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4309 command line option is disabled.
4311 6. Macro names set by the -D option must start with an upper case letter, just
4312 like macro names defined in the configuration file.
4314 7. Added "dereference=" facility to LDAP.
4316 8. Two instances of the typo "uknown" in the source files are fixed.
4318 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4319 the Configure-Makefile script screwed up while processing it.
4321 10. Incorporated PCRE 4.4.
4323 11. The SMTP synchronization check was not operating right at the start of an
4324 SMTP session. For example, it could not catch a HELO sent before the client
4325 waited for the greeting. There is now a check for outstanding input at the
4326 point when the greeting is written. Because of the duplex, asynchronous
4327 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4328 way, but not yet received, when the check is performed.
4330 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4331 on TCP/IP sockets, because this apparently causes some broken clients to
4334 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4335 unchanged) from the Cygwin maintainer.
4337 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4338 was supported instead of testing for mbx. Effectively a typo.
4340 15. The spa authenticator server code was not checking that the input it
4341 received was valid base64.
4343 16. The debug output line for the "set" modifier in ACLs was not showing the
4344 name of the variable that was being set.
4346 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4348 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4349 lookup on its own. Something else was needed to trigger the lookup. For
4350 example, a match in host_lookup or the need for a host name in a host list.
4351 Now, if $sender_host_name is referenced and the host name has not yet been
4352 looked up, a lookup is performed. If the lookup fails, the variable remains
4353 empty, and $host_lookup_failed is set to "1".
4355 19. Added "eqi" as a case-independent comparison operator.
4357 20. The saslauthd authentication condition could segfault if neither service
4358 nor realm was specified.
4360 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4361 error message that was logged was misleading, and incoming SMTP
4362 connections were dropped. The message is now more accurate, and temporary
4363 errors are given to SMTP connections.
4365 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4366 (except RSET) with a 421 error, until QUIT is received. However, it was
4367 failing to send a response to QUIT.
4369 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4370 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4371 ACL is now run after the helo_try_verify_hosts code.
4373 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4374 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4375 case-independent, so other case variants are also recognized). Apparently
4376 some systems use these upper case variants.
4378 25. If more than two messages were waiting for the same host, and a transport
4379 filter was specified for the transport, Exim sent two messages over the
4380 same TCP/IP connection, and then failed with "socket operation on non-
4381 socket" when it tried to send the third.
4383 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4385 27. The extern definition of crypt16() in expand.c was not being excluded when
4386 the OS had its own crypt16() function.
4388 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4389 as a preferred synonym for return_size_limit, both as an option and as an
4392 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4394 30. Changed the default configuration ACL to relax the local part checking rule
4395 for addresses that are not in any local domains. For these addresses,
4396 slashes and pipe symbols are allowed within local parts, but the sequence
4397 /../ is explicitly forbidden.
4399 31. SPA server authentication was not clearing the challenge buffer before
4402 32. log_message in a "warn" ACL statement was writing to the reject log as
4403 well as to the main log, which contradicts the documentation and doesn't
4404 seem right (because no rejection is happening). So I have stopped it.
4406 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4407 However, I am unable to do any testing of this.
4409 34. Fixed an infelicity in the appendfile transport. When checking directories
4410 for a mailbox, to see if any needed to be created, it was accidentally
4411 using path names with one or more superfluous leading slashes; tracing
4412 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4414 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4415 contents are added to the log line that is written for every discarded
4416 recipient. (Previously a log_message setting was ignored.)
4418 36. The ${quote: operator now quotes the string if it is empty.
4420 37. The install script runs exim in order to find its version number. If for
4421 some reason other than non-existence or emptiness, which it checks, it
4422 could not run './exim', it was installing it with an empty version number,
4423 i.e. as "exim-". This error state is now caught, and the installation is
4426 38. An argument was missing from the function that creates an error message
4427 when Exim fails to connect to the socket for saslauthd authentication.
4428 This could cause Exim to crash, or give a corrupted message.
4430 39. Added isip, isip4, and isip6 to ${if conditions.
4432 40. The ACL variables $acl_xx are now saved with the message, and can be
4433 accessed later in routers, transports, and filters.
4435 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4436 strings in the file are not string-expanded.
4438 42. If a MAIL command specified a SIZE value that was too large to fit into an
4439 int variable, the check against message_size_limit failed. Such values are
4440 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4441 day this will have to be increased, but I don't think I want to be around
4442 when emails are that large.
4449 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4450 iconv() is not standard in FreeBSD.
4452 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4453 IPv6 enabled. The observed symptom was a segmentation fault on return from
4454 the function os_common_find_running_interfaces() in src/os.c.
4456 3. In the check_special_case() function in daemon.c I had used "errno" as an
4457 argument name, which causes warnings on some systems. This was basically a
4458 typo, since it was named "eno" in the comments!
4460 4. The code that waits for the clock to tick (at a resolution of some fraction
4461 of a second) so as to ensure message-id uniqueness was always waiting for
4462 at least one whole tick, when it could have waited for less. [This is
4463 almost certainly not relevant at current processor speeds, where it is
4464 unlikely to ever wait at all. But we try to future-proof.]
4466 5. The function that sleeps for a time interval that includes fractions of a
4467 second contained a race. It did not block SIGALRM between setting the
4468 timer, and suspending (a couple of lines later). If the interval was short
4469 and the sigsuspend() was delayed until after it had expired, the suspension
4470 never ended. On busy systems this could lead to processes getting stuck for
4473 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4474 process, before it forks any delivery processes. The open lookup caching
4475 mechanism meant that the open file or database connection was passed into
4476 the delivery process. The problem was that delivery processes always tidy
4477 up cached lookup data. This could cause a problem for the next delivery
4478 process started by the queue runner, because the external queue runner
4479 process does not know about the closure. So the next delivery process
4480 still has data in the lookup cache. In the case of a file lookup, there was
4481 no problem because closing a file descriptor in a subprocess doesn't affect
4482 the parent. However, if the lookup was caching a connection to a database,
4483 the connection was closed, and the second delivery process was likely to
4484 see errors such as "PGSQL: query failed: server closed the connection
4485 unexpectedly". The problem has been fixed by closing all cached lookups
4486 in a queue runner before running a delivery process.
4488 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4489 seem to have the "const" qualifier which it has on other OS. I've
4492 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4493 *of the same type* (client or server) with the same public name that an
4494 error should be diagnosed.
4496 9. When Exim looked up a host name for an IP address, but failed to find the
4497 original IP address when looking up the host name (a safety check), it
4498 output the message "<ip address> does not match any IP for NULL", which was
4499 confusing, to say the least. The bug was that the host name should have
4500 appeared instead of "NULL".
4502 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4503 user that is built into the binary, and the -C or -D options is used, root
4504 privilege is dropped before the configuration file is read. In addition,
4505 logging is switched to stderr instead of the normal log files. If the
4506 configuration then re-defines the Exim user, the unprivileged environment
4507 is probably not what is expected, so Exim logs a panic warning message (but
4510 However, if deliver_drop_privilege is set, the unprivileged state may well
4511 be exactly what is intended, so the warning has been cut out in that case,
4512 and Exim is allowed to try to write to its normal log files.
4518 1. smtp_return_error_details was not giving details for temporary sender
4519 or receiver verification errors.
4521 2. Diagnose a configuration error if two authenticators have the same public
4524 3. Exim used not to create the message log file for a message until the first
4525 delivery attempt. This could be confusing when incoming messages were held
4526 for policy or load reasons. The message log file is now created at the time
4527 the message is received, and an initial "Received" line is written to it.
4529 4. The automatically generated man page for command line options had a minor
4530 bug that caused no ill effects; however, a more serious problem was that
4531 the procedure for building the man page automatically didn't always
4532 operate. Consequently, release 4.20 contains an out-of-date version. This
4533 shouldn't happen again.
4535 5. When building Exim with embedded Perl support, the script that builds the
4536 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4537 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4539 6. The freeze_tell option was not being used for messages that were frozen on
4540 arrival, either by an ACL or by local_scan().
4542 7. Added the smtp_incomplete_transaction log selector.
4544 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4545 was accepting AUTH without a new EHLO.
4547 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4548 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4551 10. Logging of TCP/IP connections (when configured) now happens in the main
4552 daemon process instead of the child process, so that the TCP/IP connection
4553 count is more accurate (but it can never be perfect).
4555 11. The use of "drop" in a nested ACL was not being handled correctly in the
4556 outer ACL. Now, if condition failure induced by the nested "drop" causes
4557 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4558 or "require"), the connection is dropped.
4560 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4561 that yield "discard" can now be used with an "accept" or a "discard" verb,
4562 but an error is generated for any others (because I can't see a useful way
4563 to define what should happen).
4565 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4566 are now processed in the same way as lines in the Exim configuration file.
4567 In particular, continuation lines are supported.
4569 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4571 15. Added -ti meaning -t -i.
4573 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4574 domains, and warn by logging if others are found.
4576 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4577 returned from GIFCONF when Exim is trying to find the list of interfaces on
4578 a host. The code in os.c has been modified to copy each ifreq to an aligned
4579 structure in all cases.
4581 Also, in some cases, the returned ifreq's were being copied to a 'struct
4582 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4583 means the last couple of bytes of an IPv6 address could be chopped if the
4584 ifreq contained only a normal sockaddr (14 bytes storage).
4586 18. Named domain lists were not supported in the hosts_treat_as_local option.
4587 An entry such as +xxxx was not recognized, and was treated as a literal
4590 19. Ensure that header lines added by a DATA ACL are included in the reject log
4591 if the ACL subsequently rejects the message.
4593 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4594 MD5 (which is deprecated).
4596 21. When testing a filter file using -bf, Exim was writing a message when it
4597 took the sender from a "From " line in the message, but it was not doing so
4598 when it took $return_path from a Return-Path: header line. It now does.
4600 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4601 with a valid header line field name (a series of printing characters
4602 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4604 23. Changed "disc" in the source to "disk" to conform to the documentation and
4605 the book and for uniformity.
4607 24. Ignore Sendmail's -Ooption=value command line item.
4609 25. When execve() failed while trying to run a command in a pipe transport,
4610 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4611 could be confused with a return value of 69 from the command itself. This
4612 has been changed to 127, the value the shell returns if it is asked to run
4613 a non-existent command. The wording for the related log line suggests a
4614 non-existent command as the problem.
4616 26. If received_header_text expands to an empty string, do not add a Received:
4617 header line to the message. (Well, it adds a token one on the spool, but
4618 marks it "old" so that it doesn't get used or transmitted.)
4620 27. Installed eximstats 1.28 (addition of -nt option).
4622 28. There was no check for failure on the call to getsockname() in the daemon
4623 code. This can fail if there is a shortage of resources on the system, with
4624 ENOMEM, for example. A temporary error is now given on failure.
4626 29. Contrary to the C standard, it seems that in some environments, the
4627 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4628 program. Exim now does this explicitly; it affects the formatting of
4629 timestamps using strftime().
4631 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4632 complaints. I've now initialized all the variables, to avoid this.
4634 32. Header lines added by a system filter were not being "seen" during
4635 transport-time rewrites.
4637 33. The info_callback() function passed to OpenSSL is set up with type void
4638 (*)(SSL *, int, int), as described somewhere. However, when calling the
4639 function (actually a macro) that sets it up, the type void(*)() is
4640 expected. I've put in a cast to prevent warnings from picky compilers.
4642 34. If a DNS black list lookup found a CNAME record, but there were no A
4643 records associated with the domain it pointed at, Exim crashed.
4645 35. If a DNS black list lookup returned more than one A record, Exim ignored
4646 all but the first. It now scans all returned addresses if a particular IP
4647 value is being sought. In this situation, the contents of the
4648 $dnslist_value variable are a list of all the addresses, separated by a
4651 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4652 to accept a host name and all its aliases if the forward lookup for any of
4653 them yielded the IP address of the incoming connection. Now it accepts only
4654 those names whose forward lookup yields the correct IP address. Any other
4655 names are discarded. This closes a loophole whereby a rogue DNS
4656 administrator could create reverse DNS records to break through a
4657 wildcarded host restriction in an ACL.
4659 37. If a user filter or a system filter that ran in a subprocess used any of
4660 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4661 the wrong values were passed to the pipe command ($thisaddress had the
4662 value of $0, $0 had the value of $1, etc). This bug was introduced by
4663 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4665 38. Improved the line breaking for long SMTP error messages from ACLs.
4666 Previously, if there was no break point between 40 and 75 characters, Exim
4667 left the rest of the message alone. Two changes have been made: (a) I've
4668 reduced the minimum length to 35 characters; (b) if it can't find a break
4669 point between 35 and 75 characters, it looks ahead and uses the first one
4670 that it finds. This may give the occasional overlong line, but at least the
4671 remaining text gets split now.
4673 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4674 file descriptors might be low, and that setting 1000 would always raise it.
4675 It turns out that in some environments, the limit is already over 1000 and
4676 that lowering it causes trouble. So now Exim takes care not to decrease it.
4678 40. When delivering a message, the value of $return_path is set to $sender_
4679 address at the start of routing (routers may change the value). By an
4680 oversight, this default was not being set up when an address was tested by
4681 -bt or -bv, which affected the outcome if any router or filter referred to
4684 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4685 log only when "message" or "log_message" are set. However, if one of the
4686 conditions was an address verification, or a call to a nested ACL, the
4687 messages generated by the underlying test were being passed through. This
4688 no longer happens. The underlying message is available in $acl_verify_
4689 message for both "message" and "log_message" expansions, so it can be
4690 passed through if needed.
4692 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4693 new expansion $bh_ to give the encoded byte string without charset
4694 translation. Translation happens only if iconv() is available; HAVE_ICONV
4695 indicates this at build time. HEADERS_CHARSET gives the charset to
4696 translate to; headers_charset can change it in the configuration, and
4697 "headers charset" can change it in an individual filter file.
4699 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4700 that creates RFC 2047 encoded "words" labels them as that charset instead
4701 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4702 expansion operator; (ii) when Exim creates a From: line for a local
4703 message; (iii) when a header line is rewritten to include a "phrase" part.
4705 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4706 buggy, causing it to skip the first lines of messages whose message ID
4707 ended in 'D'. This would not have bitten before Exim release 4.14, because
4708 message IDs were unlikely to end in 'D' before then. The effect was to have
4709 incorrect size information for certain domains.
4711 45. #include "config.h" was missing at the start of the crypt16.c module. This
4712 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4715 46. If there was a timeout during a "random" callout check, Exim treated it as
4716 a failure of the random address, and carried on sending RSET and the real
4717 address. If the delay was just some slowness somewhere, the response to the
4718 original RCPT would be taken as a response to RSET and so on, causing
4719 mayhem of various kinds.
4721 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4722 when I implemented it. It didn't allow for the fact that some option values
4723 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4724 the right test for positive values.
4726 48. Domain names in DNS records are case-independent. Exim always looks them up
4727 in lower case. Some resolvers return domain names in exactly the case they
4728 appear in the zone file, that is, they may contain uppercase letters. Not
4729 all resolvers do this - some return always lower case. Exim was treating a
4730 change of case by a resolver as a change of domain, similar to a widening
4731 of a domain abbreviation. This triggered its re-routing code and so it was
4732 trying to route what was effectively the same domain again. This normally
4733 caused routing to fail (because the router wouldn't handle the domain
4734 twice). Now Exim checks for this case specially, and just changes the
4735 casing of the domain that it ultimately uses when it transmits the message
4738 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4741 50. If a filter generated a file delivery with a non-absolute name (possible if
4742 no home directory exists for the router), the forbid_file option was not
4745 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4746 the existing equality matching.
4748 52. Exim was using ints instead of ino_t variables in some places where it was
4749 dealing with inode numbers.
4751 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4752 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4753 called TMPDIR, and if it finds it is different, it changes its value.
4755 54. The smtp_printf() function is now made available to local_scan() so
4756 additional output lines can be written before returning. There is also an
4757 smtp_fflush() function to enable the detection of a dropped connection.
4758 The variables smtp_input and smtp_batched_input are exported to
4761 55. Changed the default runtime configuration: the message "Unknown user"
4762 has been removed from the ACL, and instead placed on the localuser router,
4763 using the cannot_route_message feature. This means that any verification
4764 failures that generate their own messages won't get overridden. Similarly,
4765 the "Unrouteable address" message that was in the ACL for unverifiable
4766 relay addresses has also been removed.
4768 56. Added hosts_avoid_esmtp to the smtp transport.
4770 57. The exicyclog script was not checking for the esoteric option
4771 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4772 will work only if exicyclog is run under the appropriate euid.
4774 58. Following a discussion on the list, the rules by which Exim recognises line
4775 endings on incoming messages have been changed. The -dropcr and drop_cr
4776 options are now no-ops, retained only for backwards compatibility. The
4777 following line terminators are recognized: LF CRLF CR. However, special
4778 processing applies to CR:
4780 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4781 nor a local message in the state where . is a terminator.
4783 (ii) If a bare CR is encountered in a header line, an extra space is added
4784 after the line terminator so as not to end the header. The reasoning
4785 behind this is that bare CRs in header lines are most likely either
4786 to be mistakes, or people trying to play silly games.
4788 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4789 was being incorrectly given as 18 bytes larger than it should have been.
4790 This is a VOB (very old bug).
4792 60. This may never have affected anything current, but just in case it has:
4793 When the local host is found other than at the start of a list of hosts,
4794 the local host, those with the same MX, and any that follow, are discarded.
4795 When the list in question was part of a longer list of hosts, the following
4796 hosts (not currently being processed) were also being discarded. This no
4797 longer happens. I'm not sure if this situation could ever has previously
4800 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4803 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4804 header. This is something that is recommended in a new Internet Draft, and
4805 is something that is documented as being done by Sendmail. There are two
4806 possible values. For messages generated by the autoreply transport, Exim
4809 Auto-Submitted: auto-replied
4811 whereas for all other generated messages (e.g. bounces) it adds
4813 Auto-Submitted: auto-generated
4815 63. The "personal" condition in filters now includes a test for the
4816 Auto-Submitted: header. If it contains the string "auto-" the message it
4817 not considered personal.
4819 64. Added rcpt_include_affixes as a generic transport option.
4821 65. Added queue_only_override (default true).
4823 66. Added the syslog_duplication option.
4825 67. If what should have been the first header line of a message consisted of
4826 a space followed by a colon, Exim was mis-interpreting it as a header line.
4827 It isn't of course - it is syntactically invalid and should therefore be
4828 treated as the start of the message body. The misbehaviour could have
4829 caused a number of strange effects, including loss of data in subsequent
4830 header lines, and spool format errors.
4832 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4833 client host had authenticated. This control can now be exercised by an ACL
4834 for more flexibility.
4836 69. By default, callouts do not happen when testing with -bh. There is now a
4837 variant, -bhc, which does actually run the callout code, including
4838 consulting and updating the callout cache.
4840 70. Added support for saslauthd authentication, courtesy of Alexander
4843 71. If statvfs() failed on the spool or log directories while checking their
4844 size for availability, Exim confusingly gave the error "space shortage".
4845 Furthermore, in debugging mode it crashed with a floating point exception.
4846 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4847 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4848 serious problem, Exim now writes to the main and panic logs when this
4849 happens, with details of the failure. It then refuses to accept the
4850 incoming message, giving the message "spool directory problem" or "log
4851 directory problem" with a 421 code for SMTP messages.
4853 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4854 0, 1, and 2 exist, because some OS complain for execs without them (see
4855 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4856 descriptors. However, the code omitted to check that the open succeeded,
4857 causing mysterious errors if for some reason the permissions on /dev/null
4858 got screwed. Now Exim writes a message to the main and panic logs, and
4859 bombs out if it can't open /dev/null.
4861 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4862 interact so that it is all more flexible. It is supposed to remain
4863 backwards compatible. Also added extra_local_interfaces.
4865 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4866 to bomb out with an assertion failure - to the client this appears as a
4867 connection drop. This problem occurs in the part of the code that was taken
4868 from the Samba project. Fortunately, the assertion is in a very simple
4869 function, so I have fixed this by reproducing the function inline in the
4870 one place where it is called, and arranging for authentication to fail
4871 instead of killing the process with assert().
4873 75. The SPA client code was not working when the server requested OEM rather
4874 than Unicode encoding.
4876 76. Added code to make require_files with a specific uid setting more usable in
4877 the case where statting the file as root fails - usually a non-root-mounted
4878 NFS file system. When this happens and the failure is EACCES, Exim now
4879 forks a subprocess and does the per-uid checking as the relevant uid.
4881 77. Added process_log_path.
4883 78. If log_file_path was not explicitly set, a setting of check_log_space or
4884 check_log_inodes was ignored.
4886 79. If a space check for the spool or log partitions fails, the incident is now
4887 logged. Of course, in the latter case the data may get lost...
4889 80. Added the %p formatting code to string_format() so that it can be used to
4890 print addresses in debug_print(). Adjusted all the address printing in the
4891 debugging in store.c to use %p rather than %d.
4893 81. There was a concern that a line of code in smtp_in.c could overflow a
4894 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4895 initially expressed, the concern was not well-founded, because trailing
4896 spaces are removed early. However, if the trailing spaces were followed by
4897 a NULL, they did not get removed, so the overflow was possible. Two fixes
4900 (a) I re-wrote the offending code in a cleaner fashion.
4901 (b) If an incoming SMTP command contains a NULL character, it is rejected
4904 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4905 runs initgroups(), so that if the Exim user is in any additional groups,
4906 they will be used during message reception.
4912 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob