1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.542 2008/02/06 12:44:58 nm4 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
10 When building exim an external PCRE library is now needed -
11 PCRE is a system library on the majority of modern systems.
12 See entry on PCRE_LIBS in EDITME file.
14 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
15 conversation. Added nologin parameter to request.
16 Patch contributed by Kirill Miazine
18 TF/01 Do not log submission mode rewrites if they do not change the address.
20 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
22 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
23 log files in place. Contributed by Roberto Lima
25 NM/04 Bugzilla 667: close socket used by dovecot authenticator
31 TK/01 Add preliminary DKIM support. Currently requires a forked version of
32 ALT-N's libdkim that I have put here:
33 http://duncanthrax.net/exim-experimental/
35 Note to Michael Haardt: I had to rename some vars in sieve.c. They
36 were called 'true' and it seems that C99 defines that as a reserved
37 keyword to be used with 'bool' variable types. That means you could
38 not include C99-style headers which use bools without triggering
39 build errors in sieve.c.
41 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
42 as mailq or other aliases. Changed the --help handling significantly
43 to do whats expected. exim_usage() emits usage/help information.
45 SC/01 Added the -bylocaldomain option to eximstats.
47 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
49 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
51 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
57 PH/01 Another patch from the Sieve maintainer.
59 PH/02 When an IPv6 address is converted to a string for single-key lookup
60 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
61 dots are used instead of colons so that keys in lsearch files need not
62 contain colons. This was done some time before quoting was made available
63 in lsearch files. However, iplsearch files do require colons in IPv6 keys
64 (notated using the quote facility) so as to distinguish them from IPv4
65 keys. This meant that lookups for IP addresses in host lists did not work
66 for iplsearch lookups.
68 This has been fixed by arranging for IPv6 addresses to be expressed with
69 colons if the lookup type is iplsearch. This is not incompatible, because
70 previously such lookups could never work.
72 The situation is now rather anomolous, since one *can* have colons in
73 ordinary lsearch keys. However, making the change in all cases is
74 incompatible and would probably break a number of configurations.
76 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
79 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
80 conversion specification without a maximum field width, thereby enabling
81 a rogue spamd server to cause a buffer overflow. While nobody in their
82 right mind would setup Exim to query an untrusted spamd server, an
83 attacker that gains access to a server running spamd could potentially
84 exploit this vulnerability to run arbitrary code as the Exim user.
86 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
87 $primary_hostname instead of what libspf2 thinks the hosts name is.
89 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
90 a directory entry by the name of the lookup key. Previously, if a
91 symlink pointed to a non-existing file or a file in a directory that
92 Exim lacked permissions to read, a lookup for a key matching that
93 symlink would fail. Now it is enough that a matching directory entry
94 exists, symlink or not. (Bugzilla 503.)
96 PH/03 The body_linecount and body_zerocount variables are now exported in the
99 PH/04 Added the $dnslist_matched variable.
101 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
102 This means they are set thereafter only if the connection becomes
105 PH/06 Added the client_condition to authenticators so that some can be skipped
106 by clients under certain conditions.
108 PH/07 The error message for a badly-placed control=no_multiline_responses left
109 "_responses" off the end of the name.
111 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
113 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
114 (without spaces) instead of just copying the configuration text.
116 PH/10 Added the /noupdate option to the ratelimit ACL condition.
118 PH/11 Added $max_received_linelength.
120 PH/12 Added +ignore_defer and +include_defer to host lists.
122 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
123 way in which PCRE > 7.0 is built.
125 PH/14 Implemented queue_only_load_latch.
127 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
128 MAIL command. The effect was to mangle the value on 64-bit systems.
130 PH/16 Another patch from the Sieve maintainer.
132 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
134 PH/18 If a system quota error occurred while trying to create the file for
135 a maildir delivery, the message "Mailbox is full" was not appended to the
136 bounce if the delivery eventually timed out. Change 4.67/27 below applied
137 only to a quota excession during the actual writing of the file.
139 PH/19 It seems that peer DN values may contain newlines (and other non-printing
140 characters?) which causes problems in log lines. The DN values are now
141 passed through string_printing() before being added to log lines.
143 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
144 and InterBase are left for another time.)
146 PH/21 Added message_body_newlines option.
148 PH/22 Guard against possible overflow in moan_check_errorcopy().
150 PH/23 POSIX allows open() to be a macro; guard against that.
152 PH/24 If the recipient of an error message contained an @ in the local part
153 (suitably quoted, of course), incorrect values were put in $domain and
154 $local_part during the evaluation of errors_copy.
160 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
161 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
164 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
165 issue a MAIL command.
167 PH/02 In an ACL statement such as
169 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
171 if a client was not listed at all, or was listed with a value other than
172 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
173 the condition was not true (as it should be), so access was not denied.
174 The bug was that the ! inversion was incorrectly passed on to the second
175 item. This has been fixed.
177 PH/03 Added additional dnslists conditions == and =& which are different from
178 = and & when the dns lookup returns more than one IP address.
180 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
181 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
183 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
184 FSYNC, which compiles an option called disable_fsync that allows for
185 bypassing fsync(). The documentation is heavily laced with warnings.
187 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
189 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
190 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
191 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
192 including adding "make clean"; (3) Added -fPIC when compiling the test
193 dynamically loaded module, to get rid of a warning.
195 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
196 message fails, move_frozen_messages = true and ignore_bounce_errors_after
197 = 0s. The bug is otherwise harmless.
199 PH/07 There was a bug in the dovecot authenticator such that the value of
200 $auth1 could be overwritten, and so not correctly preserved, after a
201 successful authentication. This usually meant that the value preserved by
202 the server_setid option was incorrect.
204 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
206 PH/09 Installed PCRE release 7.0.
208 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
209 run for batched SMTP input. It is now run at the start of every message
210 in the batch. While fixing this I discovered that the process information
211 (output by running exiwhat) was not always getting set for -bs and -bS
212 input. This is fixed, and it now also says "batched" for BSMTP.
214 PH/11 Added control=no_pipelining.
216 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
217 patch, slightly modified), and move the expansion of helo_data till after
218 the connection is made in the smtp transport (so it can use these
221 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
223 PH/14 Added log_selector = +pid.
225 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
227 PH/16 Add ${if forany and ${if forall.
229 PH/17 Added dsn_from option to vary the From: line in DSNs.
231 PH/18 Flush SMTP output before performing a callout, unless control =
232 no_callout_flush is set.
234 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
235 was true (the default) a successful delivery failed to delete the retry
236 item, thus causing premature timeout of the address. The bug is now
239 PH/20 Added hosts_avoid_pipelining to the smtp transport.
241 PH/21 Long custom messages for fakedefer and fakereject are now split up
242 into multiline reponses in the same way that messages for "deny" and
243 other ACL rejections are.
245 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
246 with slight modification.
248 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
249 draft, changing the syntax and factoring some duplicate code".
251 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
252 for deliveries of the second and subsequent messages over the same SMTP
255 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
256 ${reduce, with only minor "tidies".
258 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
260 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
261 expansion side effects.
263 PH/27 When a message times out after an over-quota error from an Exim-imposed
264 quota, the bounce message says "mailbox is full". This message was not
265 being given when it was a system quota that was exceeded. It now should
268 MH/03 Made $recipients available in local_scan(). local_scan() already has
269 better access to the recipient list through recipients_list[], but
270 $recipients can be useful in postmaster-provided expansion strings.
272 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
273 in the case of a MAIL command with additional options following the
274 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
275 were accidentally chopped off.
277 PH/29 SMTP synchronization checks are implemented when a command is read -
278 there is a check that no more input is waiting when there shouldn't be
279 any. However, for some commands, a delay in an ACL can mean that it is
280 some time before the response is written. In this time, more input might
281 arrive, invalidly. So now there are extra checks after an ACL has run for
282 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
283 pipelining has not been advertised.
285 PH/30 MH's patch to allow iscntrl() characters to be list separators.
287 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
288 returned in the SMTP response when smtp_return_error_details was false.
291 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
292 instead of the C I/O that was originally supplied, because problems were
295 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
296 Exim which did not show up earlier: it was assuming that a call to
297 SSL_CTX_set_info_callback() might give an error value. In fact, there is
298 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
299 was a macro that became an assignment, so it seemed to work. This has
300 changed to a proper function call with a void return, hence the compile
301 error. Exim's code has been fixed.
303 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
306 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
308 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
310 PH/37 If a message is not accepted after it has had an id assigned (e.g.
311 because it turns out to be too big or there is a timeout) there is no
312 "Completed" line in the log. When some messages of this type were
313 selected by exigrep, they were listed as "not completed". Others were
314 picked up by some special patterns. I have improved the selection
315 criteria to be more general.
317 PH/38 The host_find_failed option in the manualroute router can now be set
318 to "ignore", to completely ignore a host whose IP address cannot be
319 found. If all hosts are ignored, the behaviour is controlled by the new
320 host_all_ignored option.
322 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
323 homing or because of multiple MX records with /mx) generated more than
324 one IP address, and the following item turned out to be the local host,
325 all the secondary addresses of the first item were incorrectly removed
326 from the list, along with the local host and any following hosts (which
327 is what is supposed to happen).
329 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
330 whoever called Exim into the -H file. In the case of the daemon it was
331 behaving confusingly. When first started, it used values for whoever
332 started the daemon, but after a SIGHUP it used the Exim user (because it
333 calls itself on a restart). I have changed the code so that it now always
336 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
337 message are rejected with the same error (e.g. no authentication or bad
338 sender address), and a DATA command is nevertheless sent (as can happen
339 with PIPELINING or a stupid MUA), the error message that was given to the
340 RCPT commands is included in the rejection of the DATA command. This is
341 intended to be helpful for MUAs that show only the final error to their
344 PH/42 Another patch from the Sieve maintainer.
346 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
347 Eximstats - Fixed some broken HTML links and added missing column headers
349 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
350 columns for Rejects, Temp Rejects, Ham, and Spam rows.
352 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
354 PH/43 Yet another patch from the Sieve maintainer.
356 PH/44 I found a way to check for a TCP/IP connection going away before sending
357 the response to the final '.' that terminates a message, but only in the
358 case where the client has not sent further data following the '.'
359 (unfortunately, this is allowed). However, in many cases there won't be
360 any further data because there won't be any more messages to send. A call
361 to select() can be used: if it shows that the input is "ready", there is
362 either input waiting, or the socket has been closed. An attempt to read
363 the next input character can distinguish the two cases. Previously, Exim
364 would have sent an OK response which the client would never have see.
365 This could lead to message repetition. This fix should cure that, at
366 least in a lot of common cases.
368 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
369 advertised in response to EHLO.
375 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
376 fixed by 4.65/MH/01 (is this a record?) are fixed:
378 (i) An empty string was always treated as zero by the numeric comparison
379 operators. This behaviour has been restored.
381 (ii) It is documented that the numeric comparison operators always treat
382 their arguments as decimal numbers. This was broken in that numbers
383 starting with 0 were being interpreted as octal.
385 While fixing these problems I realized that there was another issue that
386 hadn't been noticed. Values of message_size_limit (both the global option
387 and the transport option) were treated as octal if they started with 0.
388 The documentation was vague. These values are now always treated as
389 decimal, and I will make that clear in the documentation.
395 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
396 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
399 MH/01 Don't check that the operands of numeric comparison operators are
400 integers when their expansion is in "skipping" mode (fixes bug
401 introduced by 4.64-PH/07).
403 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
404 child addresses, Exim now panics and dies. Previously, because the count
405 is held in a short int, deliveries were likely to be lost. As such a
406 large number of recipients for a single message is ridiculous
407 (performance will be very, very poor), I have chosen to impose a limit
408 rather than extend the field.
414 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
415 leftover -K file (the existence of which was triggered by #402).
416 While we were at it, introduced process PID as part of the -K
417 filename. This should rule out race conditions when creating
420 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
421 processing considerably. Previous code took too long for large mails,
422 triggering a timeout which in turn triggers #401.
424 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
425 in the DK code in transports.c. sendfile() is not really portable,
426 hence the _LINUX specificness.
428 TF/01 In the add_headers option to the mail command in an Exim filter,
429 there was a bug that Exim would claim a syntax error in any
430 header after the first one which had an odd number of characters
433 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
434 callout verification, Exim cached a "reject" for the entire domain. This
435 is correct for most verifications, but it is not correct for a recipient
436 verification with use_sender or use_postmaster set, because in that case
437 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
438 case of MAIL FROM:<> rejection from other early rejections (e.g.
439 rejection of HELO). When verifying a recipient using a non-null MAIL
440 address, the cache is ignored if it shows MAIL FROM:<> rejection.
441 Whatever the result of the callout, the value of the domain cache is
442 left unchanged (for any other kind of callout, getting as far as trying
443 RCPT means that the domain itself is ok).
445 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
448 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
449 manifest itself as EPIPE rather than ECONNECT. When tidying away a
450 session, the daemon ignores ECONNECT errors and logs others; it now
451 ignores EPIPE as well.
453 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
454 (quoted-printable decoding).
456 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
457 later the small subsequent patch to fix an introduced bug.
459 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
461 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
463 PH/08 An error is now given if message_size_limit is specified negative.
465 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
466 to be given (somewhat) arbitrary names.
468 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
471 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
472 miscellaneous code fixes
474 PH/10 Added the log_reject_target ACL modifier to specify where to log
477 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
478 hostname. This is wrong, because it relates to the incoming message (and
479 probably the interface on which it is arriving) and not to the outgoing
480 callout (which could be using a different interface). This has been
481 changed to use the value of the helo_data option from the smtp transport
482 instead - this is what is used when a message is actually being sent. If
483 there is no remote transport (possible with a router that sets up host
484 addresses), $smtp_active_hostname is used.
486 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
487 tweaks were necessary in order to get it to work (see also 21 below):
488 (a) The code assumed that strncpy() returns a negative number on buffer
489 overflow, which isn't the case. Replaced with Exim's string_format()
491 (b) There were several signed/unsigned issues. I just did the minimum
492 hacking in of casts. There is scope for a larger refactoring.
493 (c) The code used strcasecmp() which is not a standard C function.
494 Replaced with Exim's strcmpic() function.
495 (d) The code set only $1; it now sets $auth1 as well.
496 (e) A simple test gave the error "authentication client didn't specify
497 service in request". It would seem that Dovecot has changed its
498 interface. Fortunately there's a specification; I followed it and
499 changed what the client sends and it appears to be working now.
501 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
504 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
505 address A is aliased to B and C, where B exists and C does not. Without
506 -v the output is "A verified" because verification stops after a
507 successful redirection if more than one address is generated. However,
508 with -v the child addresses are also verified. Exim was outputting "A
509 failed to verify" and then showing the successful verification for C,
510 with its parentage. It now outputs "B failed to verify", showing B's
511 parentage before showing the successful verification of C.
513 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
514 look up a TXT record in a specific list after matching in a combined
517 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
518 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
519 they consult the DNS. I had assumed they would set it the way they
520 wanted; and indeed my experiments on Linux seem to show that in some
521 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
522 To be on the safe side, however, I have now made the interface to
523 host_find_byname() similar to host_find_bydns(), with an argument
524 containing the DNS resolver options. The host_find_byname() function now
525 sets these options at its start, just as host_find_bydns() does. The smtp
526 transport options dns_qualify_single and dns_search_parents are passed to
527 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
528 of host_find_byname() use the default settings of RES_DEFNAMES
529 (qualify_single) but not RES_DNSRCH (search_parents).
531 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
532 spool_read_header() do less string testing, by means of a preliminary
533 switch on the second character of optional "-foo" lines. (This is
534 overdue, caused by the large number of possibilities that now exist.
535 Originally there were few.) While I was there, I also converted the
536 str(n)cmp tests so they don't re-test the leading "-" and the first
537 character, in the hope this might squeeze out yet more improvement.
539 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
540 flag allowing group syntax was set by the header_syntax check but not
541 turned off, possible causing trouble later; (2) The flag was not being
542 set at all for the header_verify test, causing "group"-style headers to
543 be rejected. I have now set it in this case, and also caused header_
544 verify to ignore an empty address taken from a group. While doing this, I
545 came across some other cases where the code for allowing group syntax
546 while scanning a header line wasn't quite right (mostly, not resetting
547 the flag correctly in the right place). These bugs could have caused
548 trouble for malformed header lines. I hope it is now all correct.
550 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
551 with the "reply" argument non-NULL. The code, however (which originally
552 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
553 but it didn't always do it. This confused somebody who was copying the
554 code for some other use. I have removed all the tests.
556 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
557 feature that was used to support insecure browsers during the U.S. crypto
558 embargo. It requires special client support, and Exim is probably the
559 only MTA that supported it -- and would never use it because real RSA is
560 always available. This code has been removed, because it had the bad
561 effect of slowing Exim down by computing (never used) parameters for the
562 RSA_EXPORT functionality.
564 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
565 authenticator to fail if there's a tab character in the incoming data
566 (there should never be unless someone is messing about, as it's supposed
567 to be base64-encoded). Also added, on Timo's advice, the "secured" option
568 if the connection is using TLS or if the remote IP is the same as the
569 local IP, and the "valid-client-cert option" if a client certificate has
572 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
573 authenticators. This can be used for authorization after authentication
574 succeeds. (In the case of plaintext, it servers for both authentication
577 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
578 if any retry times were supplied.
580 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
581 connection, where there is no client IP address to check. In this
582 situation, the verify now always succeeds.
584 PH/25 Applied John Jetmore's -Mset patch.
586 PH/26 Added -bem to be like -Mset, but loading a message from a file.
588 PH/27 In a string expansion for a processed (not raw) header when multiple
589 headers of the same name were present, leading whitespace was being
590 removed from all of them, but trailing whitespace was being removed only
591 from the last one. Now trailing whitespace is removed from each header
592 before concatenation. Completely empty headers in a concatenation (as
595 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
596 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
598 PH/29 [Removed. This was a change that I later backed out, and forgot to
599 correct the ChangeLog entry (that I had efficiently created) before
600 committing the later change.]
602 PH/30 Exim was sometimes attempting to deliver messages that had suffered
603 address errors (4xx response to RCPT) over the same connection as other
604 messages routed to the same hosts. Such deliveries are always "forced",
605 so retry times are not inspected. This resulted in far too many retries
606 for the affected addresses. The effect occurred only when there were more
607 hosts than the hosts_max_try setting in the smtp transport when it had
608 the 4xx errors. Those hosts that it had tried were not added to the list
609 of hosts for which the message was waiting, so if all were tried, there
610 was no problem. Two fixes have been applied:
612 (i) If there are any address or message errors in an SMTP delivery, none
613 of the hosts (tried or untried) are now added to the list of hosts
614 for which the message is waiting, so the message should not be a
615 candidate for sending over the same connection that was used for a
616 successful delivery of some other message. This seems entirely
617 reasonable: after all the message is NOT "waiting for some host".
618 This is so "obvious" that I'm not sure why it wasn't done
619 previously. Hope I haven't missed anything, but it can't do any
620 harm, as the worst effect is to miss an optimization.
622 (ii) If, despite (i), such a delivery is accidentally attempted, the
623 routing retry time is respected, so at least it doesn't keep
624 hammering the server.
626 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
627 in ${readsocket because some servers need this prod.
629 PH/32 Added some extra debug output when updating a wait-xxx database.
631 PH/33 The hint "could be header name not terminated by colon", which has been
632 given for certain expansion errors for a long time, was not being given
633 for the ${if def:h_colon_omitted{... case.
635 PH/34 The spec says: "With one important exception, whenever a domain list is
636 being scanned, $domain contains the subject domain." There was at least
637 one case where this was not true.
639 PH/35 The error "getsockname() failed: connection reset by peer" was being
640 written to the panic log as well as the main log, but it isn't really
641 panic-worthy as it just means the connection died rather early on. I have
642 removed the panic log writing for the ECONNRESET error when getsockname()
645 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
646 runs only) independently of the message's sender address. This meant
647 that, if the 4xx error was in fact related to the sender, a different
648 message to the same recipient with a different sender could confuse
649 things. In particualar, this can happen when sending to a greylisting
650 server, but other circumstances could also provoke similar problems.
651 I have changed the default so that the retry time for these errors is now
652 based a combination of the sender and recipient addresses. This change
653 can be overridden by setting address_retry_include_sender=false in the
656 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
657 remote server are returned as part of bounce messages. This was not
658 happening for LMTP over a pipe (the lmtp transport), but now it is the
659 same for both kinds of LMTP.
661 PH/38 Despite being documented as not happening, Exim was rewriting addresses
662 in header lines that were in fact CNAMEs. This is no longer the case.
664 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
665 and queue runs started by the daemon processed all messages. This has
666 been fixed so that -R and -S can now usefully be given with -q<time>.
668 PH/40 Import PCRE release 6.7 (fixes some bugs).
670 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
672 PH/42 Give an error if -q is specified more than once.
674 PH/43 Renamed the variables $interface_address and $interface_port as
675 $received_ip_address and $received_port, to make it clear that these
676 values apply to message reception, and not to the outgoing interface when
677 a message is delivered. (The old names remain recognized, of course.)
679 PH/44 There was no timeout on the connect() call when using a Unix domain
680 socket in the ${readsocket expansion. There now is.
682 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
683 be meaningful with "accept".
685 SC/01 Eximstats V1.43
686 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
688 SC/02 Eximstats V1.44
689 Use a glob alias rather than an array ref in the generated
690 parser. This improves both readability and performance.
692 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
693 Collect SpamAssassin and rejection statistics.
694 Don't display local sender or destination tables unless
695 there is data to show.
696 Added average volumes into the top table text output.
698 SC/04 Eximstats V1.46
699 Collect data on the number of addresses (recipients)
700 as well as the number of messages.
702 SC/05 Eximstats V1.47
703 Added 'Message too big' to the list of mail rejection
704 reasons (thanks to Marco Gaiarin).
706 SC/06 Eximstats V1.48
707 Mainlog lines which have GMT offsets and are too short to
708 have a flag are now skipped.
710 SC/07 Eximstats V1.49 (Alain Williams)
711 Added the -emptyok flag.
713 SC/08 Eximstats V1.50
714 Fixes for obtaining the IP address from reject messages.
716 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
717 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
718 whitesspace changes from 4.64-PH/27
720 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
723 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
724 are found, allow negative numbers in numeric criteria)
726 JJ/06 exipick.20061117.2, added new $message_body_missing variable
728 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
729 to match changes made in 4.64-PH/43
731 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
733 PH/47 Put in an explicit test for a DNS lookup of an address record where the
734 "domain" is actually an IP address, and force a failure. This locks out
735 those revolvers/nameservers that support "A-for-A" lookups, in
736 contravention of the specifications.
738 PH/48 When a host name was looked up from an IP address, and the subsequent
739 forward lookup of the name timed out, the host name was left in
740 $sender_host_name, contrary to the specification.
742 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
743 restricted to single-key lookups, Exim was not diagnosing an error if
744 * or *@ was used with a query-style lookup.
746 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
748 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
749 long ago, but noone interested enough thought of it. Let's just say that
750 the "1.1" means that there are some new functions that weren't there at
751 some point in the past.
753 PH/51 Error processing for expansion failure of helo_data from an smtp
754 transport during callout processing was broken.
756 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
757 tested/used via the -bh/-bhc/-bs options.
759 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
760 bug, fixed in subsequent PCRE releases).
762 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
763 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
765 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
771 SC/01 Use a glob alias rather than an array ref in eximstats generated
772 parser. This improves both readability and performance.
774 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
775 Don't display local sender or destination tables in eximstats unless
776 there is data to show.
777 Added average volumes into the eximstats top table text output.
779 SC/03 Collect data on the number of addresses (recipients) as well
780 as the number of messages in eximstats.
782 TF/01 Correct an error in the documentation for the redirect router. Exim
783 does (usually) call initgroups() when daemonizing.
785 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
786 with consistent privilege compared to when running as a daemon.
788 TF/03 Note in the spec that $authenticated_id is not set for local
789 submissions from trusted users.
791 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
792 Thanks to Dean Brooks <dean@iglou.com> for the patch.
794 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
795 by adding some example configuration directives to the default
796 configuration file. A little bit of work is required to uncomment the
797 directives and define how usernames and passwords are checked, but
798 there is now a framework to start from.
800 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
801 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
802 without this. I don't know how relevant this is to other LDAP libraries.
804 PH/02 Add the verb name to the "unknown ACL verb" error.
806 PH/03 Magnus Holmgren's patch for filter_prepend_home.
808 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
810 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
811 directory not expanded when it should be if an expanded home directory
812 was set for the address (which is overridden by the transport).
814 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
817 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
818 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
819 because it is too late at that time, and has no effect.
821 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
822 security issue with \' (bugzilla #107). I could not use the
823 PQescapeStringConn() function, because it needs a PGconn value as one of
826 PH/08 When testing addresses using -bt, indicate those final addresses that
827 are duplicates that would not cause an additional delivery. At least one
828 person was confused, thinking that -bt output corresponded to deliveries.
829 (Suppressing duplicates isn't a good idea as you lose the information
830 about possibly different redirections that led to the duplicates.)
832 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
833 systems where poll() doesn't work, in particular OS X.
835 PH/10 Added more information to debugging output for retry time not reached.
837 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
838 operations in malware.c.
840 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
843 PH/13 If write_rejectlog was set false when logging was sent to syslog with
844 syslog_duplication set false, log lines that would normally be written
845 both the the main log and to the reject log were not written to syslog at
848 PH/14 In the default configuration, change the use of "message" in ACL warn
849 statements to "add_header".
851 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
852 not followed by a command (e.g. "seen endif").
854 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
855 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
858 PH/17 Added extra conditions to the default value of delay_warning_condition
862 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
863 { match{$h_precedence:}{(?i)bulk|list|junk} } \
864 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
867 The Auto-Submitted: and various List- headers are standardised, whereas I
868 don't think Precedence: ever was.
870 PH/18 Refactored debugging code in route_finduser() to show more information,
871 in particular, the error code if getpwnam() issues one.
873 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
874 This is apparently needed in addition to the PH/07 change above to avoid
875 any possible encoding problems.
877 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
878 but not after initializing Perl.
880 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
881 output them only if debugging. By default they are written stderr,
882 apparently, which is not desirable.
884 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
887 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
890 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
892 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
893 authenticated or an ident call has been made. Suppress the default
894 values for $authenticated_id and $authenticated_sender (but permit -oMai
895 and -oMas) when testing with -bh.
897 PH/24 Re-jigged the order of the tests in the default configuration so that the
898 tests for valid domains and recipients precede the DNS black list and CSA
899 tests, on the grounds that those ones are more expensive.
901 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
902 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
903 This bug exists in every version of Exim that I still have, right back to
906 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
907 However, an attempt to turn on case-sensitivity in a regex key by
908 including (?-i) didn't work because the subject string was already
909 lowercased, and the effects were non-intuitive. It turns out that a
910 one-line patch can be used to allow (?-i) to work as expected.
916 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
917 other effects) broke the use of negated acl sub-conditions.
919 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
922 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
923 "Deny" causes Exim to reject the incoming connection with a 554 error.
924 Unfortunately, if there is a major crisis, such as a disk failure,
925 tcp-wrappers gives "deny", whereas what one would like would be some
926 kind of temporary error. A kludge has been added to help with this.
927 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
928 554 error is used if errno is still zero or contains ENOENT (which occurs
929 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
932 PH/03 Add -lutil to the default FreeBSD LIBS setting.
934 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
935 errors. Otherwise a message that provokes a temporary error (when other
936 messages do not) can cause a whole host to time out.
938 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
939 addresses were routed directly to files or pipes from a redirect router.
940 File deliveries just didn't batch; pipe deliveries might have suffered
943 PH/06 A failure to get a lock for a hints database would erroneously always say
944 "Failed to get write lock", even when it was really a read lock.
946 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
947 of 0600. This has been changed to use the value of the lockfile_mode
948 option (which defaults to 0600).
950 PH/08 Applied small patch from the Sieve maintainer.
952 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
953 folder from quota calculations, a direct delivery into this folder messed
954 up the contents of the maildirsize file. This was because the regex was
955 used only to exclude .Trash (or whatever) when the size of the mailbox
956 was calculated. There was no check that a delivery was happening into an
957 excluded directory. This bug has been fixed by ignoring all quota
958 processing for deliveries into excluded directories.
960 PH/10 Added the maildirfolder_create_regex option to appendfile.
966 PH/01 The code for finding all the local interface addresses on a FreeBSD
967 system running IPv6 was broken. This may well have applied to all BSD
968 systems, as well as to others that have similar system calls. The broken
969 code found IPv4 interfaces correctly, but gave incorrect values for the
970 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
971 that it would not match correctly against @[] and not recognize the IPv6
974 PH/02 The ipliteral router was not recognizing addresses of the form user@
975 [ipv6:....] because it didn't know about the "ipv6:" prefix.
977 PH/03 Added disable_ipv6.
979 PH/04 Changed $reply_address to use the raw form of the headers instead of the
980 decoded form, because it is most often used to construct To: headers
981 lines in autoreplies, and the decoded form may well be syntactically
982 invalid. However, $reply_address has leading white space removed, and all
983 newlines turned into spaces so that the autoreply transport does not
986 PH/05 If group was specified without a user on a router, and no group or user
987 was specified on a transport, the group from the router was ignored.
989 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
990 for visible compile-time settings that can be used to change these
991 numbers, for those that want even more. Backwards compatibility with old
992 spool files has been maintained. However, going back to a previous Exim
993 release will lost any variables that are in spool files.
995 PH/07 Two small changes when running in the test harness: increase delay when
996 passing a TCP/IP connection to a new process, in case the original
997 process has to generate a bounce, and remove special handling of
998 127.0.0.2 (sic), which is no longer necessary.
1000 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1001 be the same on different OS.
1003 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1006 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1007 whether --show-vars was specified or not
1009 JJ/02 exipick: Added support for new ACL variable spool format introduced
1012 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1013 syntactically invalid From: or Reply-to: line, and a filter used this to
1014 generate an autoreply, and therefore failed to obtain an address for the
1015 autoreply, Exim could try to deliver to a non-existent relative file
1016 name, causing unrelated and misleading errors. What now happens is that
1017 it logs this as a hard delivery error, but does not attempt to create a
1020 PH/11 The exinext utility has a -C option for testing purposes, but although
1021 the given file was scanned by exinext itself; it wasn't being passed on
1022 when Exim was called.
1024 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1025 an end-of-file indication when reading a command response.
1027 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1028 compiled. In many other places in Exim, IPv6 addresses are always
1029 recognized, so I have changed this. It also means that IPv4 domain
1030 literals of the form [IPV4:n.n.n.n] are now always recognized.
1032 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1033 used if the router is not running as root, for example, when verifying at
1034 ACL time, or when using -bh. The debugging output from this situation was
1035 non-existent - all you got was a failure to exec. I have made two
1038 (a) Failures to set uid/gid, the current directory, or a process leader
1039 in a subprocess such as that created by queryprogram now generate
1040 suitable debugging ouput when -d is set.
1042 (b) The queryprogram router detects when it is not running as root,
1043 outputs suitable debugging information if -d is set, and then runs
1044 the subprocess without attempting to change uid/gid.
1046 PH/15 Minor change to Makefile for building test_host (undocumented testing
1049 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1050 additional section of a DNS packet that returns MX or SRV records.
1051 Instead, it always explicitly searches for A/AAAA records. This avoids
1052 major problems that occur when a DNS server includes only records of one
1053 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1054 fixed another bug: if SRV records were looked up and the corresponding
1055 address records were *not* found in the additional section, the port
1056 values from the SRV records were lost.
1058 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1059 using the correct key (the original address) when searching the retry
1060 rules in order to find which one to use for generating the retry hint.
1062 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1063 adding the default one. Similarly, if it contains a Reply-To: header, the
1064 errors_reply_to option, if set, is not used.
1066 PH/19 When calculating a retry time, Exim used to measure the "time since
1067 failure" by looking at the "first failed" field in the retry record. Now
1068 it does not use this if it is later than than the arrival time of the
1069 message. Instead it uses the arrival time. This makes for better
1070 behaviour in cases where some deliveries succeed, thus re-setting the
1071 "first failed" field. An example is a quota failure for a huge message
1072 when small messages continue to be delivered. Without this change, the
1073 "time since failure" will always be short, possible causing more frequent
1074 delivery attempts for the huge message than are intended.
1075 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1077 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1078 $1, $2, $3) because the numerical variables can be reset during some
1079 expansion items (e.g. "match"), thereby losing the authentication data.
1081 PH/21 Make -bV show the size of off_t variables so that the test suite can
1082 decide whether to run tests for quotas > 2G.
1084 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1085 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1086 filecount value is greater than 2G or if a quota value is greater than 2G
1087 on a system where the size of off_t is not greater than 4, a panic error
1090 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1091 never match. The debug and -bh output now contains an explicit error
1092 message indicating a malformed IPv4 address or mask.
1094 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1095 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1096 PH/23 above applies.
1098 PH/25 Do not write to syslog when running in the test harness. The only
1099 occasion when this arises is a failure to open the main or panic logs
1100 (for which there is an explicit test).
1102 PH/26 Added the /no_tell option to "control=freeze".
1104 PH/27 If a host name lookup failed very early in a connection, for example, if
1105 the IP address matched host_lookup and the reverse lookup yielded a name
1106 that did not have a forward lookup, an error message of the form "no IP
1107 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1108 could be logged. Now it outputs the IP address instead of "NULL".
1110 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1111 allows the sender and the authenticated sender to be set when
1112 submitting a message from within Exim. Since child_open_exim() is
1113 documented for local_scan(), the new function should be too.
1115 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1116 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1117 results in an empty string is now treated as unset.
1119 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1121 PH/31 Added sender_verify_fail logging option.
1123 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1124 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1125 tidied the source and removed it altogether.
1127 PH/33 When a queue run was abandoned because the load average was too high, a
1128 log line was always written; now it is written only if the queue_run log
1129 selector is set. In addition, the log line for abandonment now contains
1130 information about the queue run such as the pid. This is always present
1131 in "start" and "stop" lines but was omitted from the "abandon" line.
1133 PH/34 Omit spaces between a header name and the colon in the error message that
1134 is given when verify = headers_syntax fails (if there are lots of them,
1135 the message gets confusing).
1137 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1138 names, as there are now some PTR records that contain slashes. This check
1139 is only to protect against broken name servers that fall over on strange
1140 characters, so the fact that it applies to all lookups doesn't matter.
1142 PH/36 Now that the new test suite is complete, we can remove some of the
1143 special code in Exim that was needed for the old test suite. For example,
1144 sorting DNS records because real resolvers return them in an arbitrary
1145 order. The new test suite's fake resolver always returns records in the
1148 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1149 bounces) except when queue_only is set, to avoid logging races between
1150 the different processes.
1152 PH/38 Panic-die if .include specifies a non-absolute path.
1154 PH/39 A tweak to the "H" retry rule from its user.
1156 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1157 a label. They prevented compilation on older perls.
1159 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1160 a warning to be raised on newish perls.
1162 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1163 on queue. Changes to match documented behaviour of showing count of
1164 messages matching specified criteria.
1166 PH/40 Changed the default ident timeout from 30s to 5s.
1168 PH/41 Added support for the use of login_cap features, on those BSD systems
1169 that have them, for controlling the resources used by pipe deliveries.
1171 PH/42 The content-scanning code uses fopen() to create files in which to put
1172 message data. Previously it was not paying any attention to the mode of
1173 the files. Exim runs with umask(0) because the rest of the code creates
1174 files with open(), and sets the required mode explicitly. Thus, these
1175 files were ending up world-writeable. This was not a big issue, because,
1176 being within the spool directory, they were not world-accessible. I have
1177 created a function called modefopen, which takes an additional mode
1178 argument. It sets umask(777), creates the file, chmods it to the required
1179 mode, then resets the umask. All the relevant calls to fopen() in the
1180 content scanning code have been changed to use this function.
1182 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1183 to 24 hours. This avoids potential overflow problems when processing G
1184 and H retry rules. I suspect nobody ever tinkers with this value.
1186 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1188 PH/45 When the plaintext authenticator is running as a client, the server's
1189 challenges are checked to ensure they are valid base64 strings. By
1190 default, the authentication attempt is cancelled if an invalid string is
1191 received. Setting client_ignore_invalid_base64 true ignores these errors.
1192 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1193 they are received. Thus, the responses can be made to depend on the
1194 challenges. If an invalid string is ignored, an empty string is placed in
1197 PH/46 Messages that are created by the autoreply transport now contains a
1198 References: header, in accordance with RFCs 2822 and 3834.
1200 PH/47 Added authenticated_sender_force to the smtp transport.
1202 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1204 PH/49 Installed latest patch from the Sieve maintainer.
1206 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1207 was also set, the appendfile transport was unnecessarily scanning a
1208 directory of message files (e.g. for maildir delivery) to find the count
1209 of files (along with the size), even though it did not need this
1210 information. It now does the scan only if it needs to find either the
1211 size of the count of files.
1213 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1215 PH/52 Two bugs concerned with error handling when the smtp transport is
1218 (i) Exim was not creating retry information for temporary errors given
1219 for individual recipients after the DATA command when the smtp transport
1220 was used in LMTP mode. This meant that they could be retried too
1221 frequently, and not timed out correctly.
1223 (ii) Exim was setting the flag that allows error details to be returned
1224 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1225 recipients that were returned after the DATA command.
1227 PH/53 This is related to PH/52, but is more general: for any failing address,
1228 when detailed error information was permitted to be returned to the
1229 sender, but the error was temporary, then after the final timeout, only
1230 "retry timeout exceeded" was returned. Now it returns the full error as
1231 well as "retry timeout exceeded".
1233 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1234 do this, and (what is worse) MTAs that accept it.
1236 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1237 will now be deprecated.
1239 PH/56 New os.c-cygwin from the Cygwin maintainer.
1241 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1242 formats (previously only available in exim formats via -bpr, -bpru,
1243 and -bpra. Now also available in native and exiqgrep formats)
1245 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1246 with very large, slow to parse queues
1248 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1250 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1252 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1253 responses to authentication challenges, though it was showing the
1254 challenges; (ii) I've removed the CR characters from the debug output for
1257 PH/58 Allow for the insertion of a newline as well as a space when a string
1258 is turned into more than one encoded-word during RFC 2047 encoding. The
1259 Sieve code now uses this.
1261 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1262 data_4xx, lost_connection, tls_required.
1264 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1265 message was being sent as an SMTP response.
1267 PH/61 Add -l and -k options to exicyclog.
1269 PH/62 When verifying, if an address was redirected to one new address, so that
1270 verification continued, and the new address failed or deferred after
1271 having set something in $address_data, the value of $address_data was not
1272 passed back to the ACL. This was different to the case when no
1273 redirection occurred. The value is now passed back in both cases.
1275 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1276 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1277 use login_cap.h, so on its own it isn't the distinguishing feature. The
1278 new name refers directly to the setclassresources() function.
1280 PH/65 Added configuration files for NetBSD3.
1282 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1284 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1285 is preferred over IPv4.
1287 PH/68 The bounce_return_message and bounce_return_body options were not being
1288 honoured for bounces generated during the reception of non-SMTP messages.
1289 In particular, this applied to messages rejected by the ACL. This bug has
1290 been fixed. However, if bounce_return_message is true and bounce_return_
1291 body is false, the headers that are returned for a non-SMTP message
1292 include only those that have been read before the error was detected.
1293 (In the case of an ACL rejection, they have all been read.)
1295 PH/69 The HTML version of the specification is now built in a directory called
1296 spec_html instead of spec.html, because the latter looks like a path with
1297 a MIME-type, and this confuses some software.
1299 PH/70 Catch two compiler warnings in sieve.c.
1301 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1302 function verify_get_ident() calls ip_connect() to connect a socket, but
1303 if the "connect()" function timed out, ip_connect() used to close the
1304 socket. However, verify_get_ident() also closes the socket later, and in
1305 between Exim writes to the log, which may get opened at this point. When
1306 the socket was closed in ip_connect(), the log could get the same file
1307 descriptor number as the socket. This naturally causes chaos. The fix is
1308 not to close the socket in ip_connect(); the socket should be closed by
1309 the function that creates it. There was only one place in the code where
1310 this was missing, in the iplookup router, which I don't think anybody now
1311 uses, but I've fixed it anyway.
1313 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1314 well as to direct DNS lookups. Otherwise the handling of names in host
1315 lists is inconsistent and therefore confusing.
1321 PH/01 Two changes to the default runtime configuration:
1323 (1) Move the checks for relay_from_hosts and authenticated clients from
1324 after to before the (commented out) DNS black list checks.
1326 (2) Add control=submission to the relay_from_hosts and authenticated
1327 clients checks, on the grounds that messages accepted by these
1328 statements are most likely to be submissions.
1330 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1332 (1) Generate an error if the third argument for the ${prvs expansion is
1335 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1338 (3) Reset the variables that are obtained from the first argument of
1339 ${prvscheck and used in the second argument before leaving the code,
1340 because their memory is reclaimed, so using them afterwards may do
1343 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1344 one (it's much easier than Tom thought :-).
1346 (5) Because of (4), we can now allow for the use of $prvscheck_result
1347 inside the third argument.
1349 PH/03 For some reason, the default setting of PATH when running a command from
1350 a pipe transport was just "/usr/bin". I have changed it to
1353 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1354 anything to be listed in the output from -bV.
1356 PH/05 When a filter generated an autoreply, the entire To: header line was
1357 quoted in the delivery log line, like this:
1359 => >A.N.Other <ano@some.domain> <original@ddress> ...
1361 This has been changed so that it extracts the operative address. There
1362 may be more than one such address. If so, they are comma-separated, like
1365 => >ano@some.domain,ona@other.domain <original@ddress> ...
1367 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1368 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1369 not being looked up in the rDNS to get a host name, Exim was showing the
1370 IP address twice in Received: lines, even though the IP addresses were
1371 identical. For example:
1373 Received: from [1.2.3.4] (helo=[1.2.3.4])
1375 However, if the real host name was known, it was omitting the HELO data
1376 if it matched the actual IP address. This has been tidied up so that it
1377 doesn't show the same IP address twice.
1379 PH/07 When both +timestamp and +memory debugging was on, the value given by
1380 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1381 called by the debug printing, thereby overwriting the timestamp buffer.
1382 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1384 PH/08 When the original message was included in an autoreply transport, it
1385 always said "this is a copy of the message, including all the headers",
1386 even if body_only or headers_only was set. It now gives an appropriate
1389 PH/09 Applied a patch from the Sieve maintainer which:
1391 o fixes some comments
1392 o adds the (disabled) notify extension core
1393 o adds some debug output for the result of if/elsif tests
1394 o points to the current vacation draft in the documentation
1395 and documents the missing references header update
1399 o fixes a bug in processing the envelope test (when testing
1400 multiple envelope elements, the last element determinted the
1403 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1404 Electronic Mail") by including:
1406 Auto-submitted: auto-generated
1408 in the messages that it generates (bounce messages and others, such as
1409 warnings). In the case of bounce messages for non-SMTP mesages, there was
1410 also a typo: it was using "Auto_submitted" (underscore instead of
1411 hyphen). Since every message generated by Exim is necessarily in response
1412 to another message, thes have all been changed to:
1414 Auto-Submitted: auto-replied
1416 in accordance with these statements in the RFC:
1418 The auto-replied keyword:
1420 - SHOULD be used on messages sent in direct response to another
1421 message by an automatic process,
1423 - MUST NOT be used on manually-generated messages,
1425 - MAY be used on Delivery Status Notifications (DSNs) and Message
1426 Disposition Notifications (MDNs),
1428 - MUST NOT be used on messages generated by automatic or periodic
1429 processes, except for messages which are automatic responses to
1432 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1433 to the default Received: header definition.
1435 PH/12 Added log selector acl_warn_skipped (default on).
1437 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1438 variables because (a) they are in the wrong storage pool and (b) even if
1439 they were copied, it wouldn't work properly because of the caching.
1441 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1442 checking when decoding. Apparently there are clients that generate
1443 overlong encoded strings. Why am I not surprised?
1445 PH/15 If the first argument of "${if match_address" was not empty, but did not
1446 contain an "@" character, Exim crashed. Now it writes a panic log message
1447 and treats the condition as false.
1449 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1451 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1452 extension "envelope-auth". The code is finished and in agreement with
1453 other implementations, but there is no documentation so far and in fact,
1454 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1455 not changing the active code.
1457 Print executed "if" and "elsif" statements when debugging is used. This
1458 helps a great deal to understand what a filter does.
1460 Document more things not specified clearly in RFC3028. I had all this
1461 sorted out, when out of a sudden new issues came to my mind. Oops."
1463 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1466 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1467 canonical form (as documented). However, after a host name lookup from
1468 the IP address, check_host() was doing a simple string comparison with
1469 addresses acquired from the DNS when checking that the found name did
1470 have the original IP as one of its addresses. Since any found IPv6
1471 addresses are likely to be in abbreviated form, the comparison could
1472 fail. Luckily, there already exists a function for doing the comparison
1473 by converting both addresses to binary, so now that is used instead of
1474 the text comparison.
1476 PH/20 There was another similar case to PH/19, when a complete host name was
1477 given in a host list; looking up its IP address could give an abbreviated
1478 form, whereas the current host's name might or might not be abbreviated.
1479 The same fix has been applied.
1485 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1486 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1489 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1490 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1492 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1494 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1495 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1496 Also, for "Auto-Submitted", treat anything other than "no" as
1497 non-personal, in accordance with RFC 3834. (Previously it treated
1498 anything starting "auto-" as non-personal.)
1500 TF/01 The control=submission/name=... option had a problem with syntax
1501 errors if the name included a slash character. The /name= option
1502 now slurps the rest of the string, so it can include any characters
1503 but it must come last in the list of options (after /sender_retain
1506 PH/05 Some modifications to the interface to the fake nameserver for the new
1514 TK/01 Added the "success_on_redirect" address verification option. See
1515 NewStuff for rationale and an example.
1517 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1519 PH/02 Patch to exigrep to allow it to work on syslog lines.
1521 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1522 fread() to skip over the body file's header line, because in Cygwin the
1523 header line is locked and is inaccessible.
1525 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1526 co-exist for some time) to make it clear that it is the Exim ID that is
1527 referenced, not the Message-ID: header line.
1529 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1530 string_format() function, because snprintf() does not exist on all
1533 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1534 ${stat: expansion item.
1536 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1537 protocol synchronization error", to keep the pedants happy.
1539 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1540 well as for IRIX systems, when gcc is being used. See the host.c source
1543 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1545 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1548 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1549 transport and to the smtp transport in LMTP mode.
1551 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1553 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1554 run a filter in a subprocess. This could lead to confusion in subsequent
1555 lookups in the parent process. There should also be a search_tidyup() at
1556 the end of the subprocess.
1558 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1559 only if the host matched helo_try_verify_hosts, which caused the
1560 verification to occur when the EHLO/HELO command was issued. The ACL just
1561 tested the remembered result. Now, if a previous verification attempt has
1562 not happened, "verify = helo" does it there and then.
1564 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1566 TK/03 Fix log output including CR from clamd.
1568 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1569 exist provoked a memory error which could cause a segfault.
1571 PH/15 Installed PCRE 6.2
1573 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1575 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1576 of the problem. Specifically, suggested +O2 rather than +O1 for the
1579 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1581 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1582 record, the port was not correctly logged when the outgoing_port log
1583 selector was set (it logged the transort's default port).
1585 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1586 fallback_hosts, and "hosts" in the smtp transport.
1588 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1589 host errors such as "Connection refused".
1591 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1592 authentication with radiusclient 0.4.9:
1594 - Error returned from rc_read_config was caught wrongly
1595 - Username/password not passed on to radius server due to wrong length.
1597 The presumption is that some radiusclient API changes for 4.51/PH/17
1598 were not taken care of correctly. The code is still untested by me (my
1599 Linux distribution still has 0.3.2 of radiusclient), but it was
1600 contributed by a Radius user.
1602 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1603 expanding the "port" option of the smtp transport.
1605 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1606 while reading a MIME header. Thanks to Tom Hughes for a patch.
1608 PH/24 Include config.h inside local_scan.h so that configuration settings are
1611 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1612 that in an ACL for RCPT (for example), you can examine exactly what was
1615 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1616 commands, but it was not correctly comparing the address with the actual
1617 client host address. Thus, it would show the EHLO address in Received:
1618 header lines when this was not necessary.
1620 PH/27 Added the % operator to ${eval:}.
1622 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1623 it should be ignoring failures (because with -C, for example, it has lost
1624 privilege). It wasn't ignoring creation failures other than "already
1627 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1630 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1631 because an input line was too long, either on its own, or by virtue of
1632 too many continuations, the temporary file was not being removed, and the
1633 return code was incorrect.
1635 PH/31 Missing "BOOL" in function definition in filtertest.c.
1637 PH/32 Applied Sieve patches from the maintainer.
1639 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1641 PH/33 Added "verify = not_blind".
1643 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1644 Local/Makefile (with some defaults set). These are used in built scripts
1645 such as exicyclog, but they have never been used in the exim_install
1646 script (though there are many overriding facilities there). I have
1647 arranged that the exim_install script now takes note of these two
1650 PH/35 Installed configuration files for Dragonfly.
1652 PH/36 When a locally submitted message by a trusted user did not contain a
1653 From: header, and the sender address was obtained from -f or from an SMTP
1654 MAIL command, and the trusted user did not use -F to supply a sender
1655 name, $originator_name was incorrectly used when constructing a From:
1656 header. Furthermore, $originator_name was used for submission mode
1657 messages from external hosts without From: headers in a similar way,
1658 which is clearly wrong.
1660 PH/37 Added control=suppress_local_fixups.
1662 PH/38 When log_selector = +received_sender was set, and the addition of the
1663 sender made the log line's construction buffer exactly full, or one byte
1664 less than full, an overflow happened when the terminating "\n" was
1667 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1668 when the result of a list match is failure because a DNS lookup failed.
1670 PH/40 RM_COMMAND is now used in the building process.
1672 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1673 the "build-* directories that it finds.
1675 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1676 address in a domain literal was a prefix of an interface address.
1678 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1679 when verifying a sender address, unless rewrite_headers is false.
1681 PH/44 Wrote a long comment about why errors_to addresses are verified as
1682 recipients, not senders.
1684 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1685 the ratelimit ACL was added.
1687 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1689 PH/46 Added extra information about PostgreSQL errors to the error string.
1691 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1692 avoiding the need to install special zones in a real server. This is
1693 backwards compatible; if it can't find the fake resolver, it drops back.
1694 Thus, both old and new test suites can be run.
1696 TF/02 Added util/ratelimit.pl
1698 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1699 clock is set back in time.
1701 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1702 Candler <B.Candler@pobox.com>.
1704 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1705 OK for addresses that are the result of redirections.
1707 PH/48 A number of further additions for the benefit of the new test suite,
1708 including a fake gethostbyname() that interfaces to the fake DNS resolver
1711 TF/06 The fix for widen_domains has also been applied to qualify_single and
1712 search_parents which are the other dnslookup options that can cause
1715 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1718 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1720 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1721 service" if it encountered an MX record with an empty target hostname.
1722 The message is now "an MX or SRV record indicated no SMTP service".
1724 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1725 if the DNS of the sending site is misconfigured. This is quite a
1726 common situation. This change restores the behaviour of treating a
1727 helo verification defer as a failure.
1729 PH/51 If self=fail was set on a router, the bounce message did not include the
1730 actual error message.
1736 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1738 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1739 command itself ended in error, the underlying message about the transport
1740 filter timeout was being overwritten with the pipe command error. Now the
1741 underlying error message should be appended to the second error message.
1743 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1745 PH/02 Reduce the amount of output that "make" produces by default. Full output
1746 can still be requested.
1748 PH/03 The warning log line about a condition test deferring for a "warn" verb
1749 was being output only once per connection, rather than after each
1750 occurrence (because it was using the same function as for successful
1751 "warn" verbs). This seems wrong, so I have changed it.
1753 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1754 it should not have, which might have caused a crash in the right
1755 circumstances, but probably never did.
1757 PH/04 Installed a modified version of Tony Finch's patch to make submission
1758 mode fix the return path as well as the Sender: header line, and to
1759 add a /name= option so that you can make the user's friendly name appear
1762 TF/03 Added the control = fakedefer ACL modifier.
1764 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1765 Mark Lowes for thorough testing.
1767 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1769 TK/03 Merged latest SRS patch from Miles Wilton.
1771 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1772 with the definition in sysexits.h (which is #included earlier).
1773 Fortunately, Exim does not actually use EX_OK. The code used to try to
1774 preserve the sysexits.h value, by assumimg that macro definitions were
1775 scanned for macro replacements. I have been disabused of this notion,
1776 so now the code just undefines EX_OK before #including unistd.h.
1778 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1779 in the smtp transport. When a block could not be written in a single
1780 write() function, the timeout was being re-applied to each part-write.
1781 This seems wrong - if the receiver was accepting one byte at a time it
1782 would take for ever. The timeout is now adjusted when this happens. It
1783 doesn't have to be particularly precise.
1785 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1786 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1788 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1789 without a domain if the check to <postmaster@domain> fails.
1791 SC/01 Eximstats: added -xls and the ability to specify output files
1792 (patch written by Frank Heydlauf).
1794 SC/02 Eximstats: use FileHandles for outputing results.
1796 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1798 SC/04 Eximstats: fixed display of large numbers with -nvr option
1800 SC/05 Eximstats: fixed merging of reports with empty tables.
1802 SC/06 Eximstats: added the -include_original_destination flag
1804 SC/07 Eximstats: removed tabs and trailing whitespace.
1806 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1808 TK/06 MBOX spool code: Add real "From " MBOX separator line
1809 so the .eml file is really in mbox format (even though
1810 most programs do not really care). Patch from Alex Miller.
1812 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1813 The latter is generated from $received_to and is only set if the
1814 message has one envelope recipient. SA can use these headers,
1815 obviously out-of-the-box. Patch from Alex Miller.
1817 PH/08 The ${def test on a variable was returning false if the variable's
1818 value was "0", contrary to what the specification has always said!
1819 The result should be true unless the variable is empty.
1821 PH/09 The syntax error of a character other than { following "${if
1822 def:variable_name" (after optional whitespace) was not being diagnosed.
1823 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1824 accidental colon was present, for example, could give incorrect results.
1826 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1827 result is used (not including appendfile, where other changes are about
1830 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1831 This involved changing a lot of size variables from int to off_t. It
1832 should work with maildirs and everything.
1834 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1835 spamd dying while we are connected to it.
1837 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1840 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1841 function for BDB 4.3.
1843 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1845 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1846 the sources for PCRE have been re-arranged and more files are now
1849 PH/15 The code I had for printing potentially long long variables in PH/11
1850 above was not the best (it lost precision). The length of off_t variables
1851 is now inspected at build time, and an appropriate printing format (%ld
1852 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1853 to be "long long int" or "long int". This is needed for the internal
1854 formatting function string_vformat().
1856 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1857 the configuration file to be ":syslog", then the script "guesses" where
1858 the logs files are, rather than using the compiled in default. In our
1859 case the guess is not the same as the compiled default, so the script
1860 suddenly stopped working when I started to use syslog. The patch checks
1861 to see if log_file_path is "". If so, it attempts to read it from exim
1862 with no configuration file to get the compiled in version, before it
1863 falls back to the previous guessing code."
1865 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1866 implementing BATV in an Exim configuration. See NewStuff for the gory
1869 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1870 Makefile that are specific to HP-UX.
1872 PH/18 If the "use_postmaster" option was set for a recipient callout together
1873 with the "random" option, the postmaster address was used as the MAIL
1874 FROM address for the random test, but not for the subsequent recipient
1875 test. It is now used for both.
1877 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1878 patch removes a few documentation additions to RFC 3028, because the
1879 latest draft now contains them. It adds the new en;ascii-case comparator
1880 and a new error check for 8bit text in MIME parts. Comparator and
1881 require names are now matched exactly. I enabled the subaddress
1882 extension, but it is not well tested yet (read: it works for me)."
1884 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1885 rework some of the code of TK/09 above to avoid the hardwired use of
1886 "%lld" and "long long". Replaced the call to snprintf() with a call to
1889 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1890 records point to non-existent hosts", "retry timeout exceeded", and
1891 "retry time not reached for any host after a long failure period".
1893 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1894 experimental DomainKeys support:
1896 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1897 (2) On an error such as an illegally used "control", the wrong name for
1898 the control was given.
1900 These problems did NOT occur unless DomainKeys support was compiled.
1902 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1904 PH/24 Added ${if match_ip condition.
1906 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1907 databases so that it will be absolutely obvious if a crash occurs in the
1908 DB library. This is a regular occurrence (often caused by mis-matched
1911 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1912 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1913 picked up on a user's system that detects such things. There doesn't seem
1914 to be a gcc warning option for this - only an attribute that has to be
1915 put on the function's prototype. It seems that in Fedora Core 4 they have
1916 set this on a number of new functions. No doubt there will be more in due
1919 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1920 specify a transport. However, if an address that was verified by such a
1921 router was the subject of a callout, Exim crashed because it tried to
1922 read the rcpt_include_affixes from the non-existent transport. Now it
1923 just assumes that the setting of that option is false. This bug was
1924 introduced by 4.51/PH/31.
1926 PH/28 Changed -d+all to exclude +memory, because that information is very
1927 rarely of interest, but it makes the output a lot bigger. People tend to
1928 do -d+all out of habit.
1930 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1931 code in os-type was giving problems when libc.so lives in lib64, like on
1934 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1935 aren't the modern standard, and it seems that some systems' include files
1936 don't always have them. Exim was already checking for some of the newer
1937 ones like T_AAAA, and defining it itself. I've added checks for all the
1938 record types that Exim uses.
1940 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1941 not automatically generating a new one, as it is supposed to. This
1942 prevented TLS from working. If the file did exist, but contained invalid
1943 data, a new version was generated, as expected. It was only the case of a
1944 non-existent file that was broken.
1946 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1947 with a change in libdomainkeys > 0.64.
1949 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1950 from DNS. If the selector record carries the flag, it now has
1951 precedence over the domain-wide flag.
1953 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1955 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1956 the use of a port name that isn't defined in /etc/services) occurred, the
1957 message was deferred as in a normal delivery, and thus remained on the
1958 spool, instead of being failed because of the mua_wrapper setting. This
1959 is now fixed, and I tidied up some of the mua_wrapper messages at the
1962 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1963 the messages in a hash of arrays rather than using individual hashes.
1964 This is a bit cleaner and results in dramatic memory savings, albeit
1965 at a slight CPU cost.
1967 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1968 as requested by Marc Sherman.
1970 SC/10 Eximstats: added histograms for user specified patterns as requested
1973 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1975 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1976 fopen() in the content-scanning modules that did not already have it.
1982 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1983 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1985 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1987 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1989 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1990 to test Sieve filters that use "vacation".
1992 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1993 that changes the way the GnuTLS parameters are stored in the cache file.
1994 The new format can be generated externally. For backward compatibility,
1995 if the data in the cache doesn't make sense, Exim assumes it has read an
1996 old-format file, and it generates new data and writes a new file. This
1997 means that you can't go back to an older release without removing the
2000 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2001 work if there are any delivery delays because "one_time" forces the
2002 parent to be marked "delivered", so its unseen clone is never tried
2003 again. For this reason, Exim now forbids the simultaneous setting of
2006 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2007 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2008 entry if you want to know the details. The fix, however, neglected to
2009 consider the case when local delivery batching is involved. The test for
2010 "previously delivered" was not happening when checking to see if an
2011 address could be batched with a previous (undelivered) one; under
2012 certain circumstances this could lead to multiple deliveries to the same
2015 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2016 in its include files, and this causes problems building Exim.
2018 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2019 header_syntax) but Exim was just ignoring anything given after a slash.
2020 In particular, this caused confusion with an attempt to use "verify =
2021 reverse_host_lookup/defer_ok". An error is now given when options are
2022 supplied for verify items that do not have them. (Maybe reverse_host_
2023 lookup should have a defer_ok option, but that's a different point.)
2025 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2026 defined by RFC 821) to 2048, because there were problems with some AUTH
2027 commands, and RFC 1869 says the size should be increased for extended
2028 SMTP commands that take arguments.
2030 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2033 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2034 "unknown" error; now it says that the functionality isn't in the binary.
2036 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2037 an address' error message when a string expansion fails (syntax or
2038 whatever). Otherwise the password may appear in the log. Following change
2039 PH/42 below, there is no longer a chance of it appearing in a bounce
2042 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2044 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2045 of its addresses was ever tried. (Bugzilla bug #2.)
2047 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2048 the result incorrectly in the debug output. (It correctly added a newline
2049 to what was transported.)
2051 TF/01 Added $received_time.
2053 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2054 commented out examples of how to interface to a virus scanner and to
2055 SpamAssassin. Also added commented examples of av_scanner and
2056 spamd_address settings.
2058 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2059 and controls are allowed in which ACLs. There were a couple of minor
2060 errors. Some of the entries in the conditions table (which is a table of
2061 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2062 negation of where the condition IS allowed.
2064 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2066 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2067 header file does not have a version number, so I've had to invent a new
2068 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2069 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2070 radiusclient), but it was contributed by a Radius user.
2072 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2073 files or directories, for OpenSSL.
2075 PH/19 When an Exim process that is running as root has to create an Exim log
2076 file, it does so in a subprocess that runs as exim:exim so as to get the
2077 ownership right at creation (otherwise, other Exim processes might see
2078 the file with the wrong ownership). There was no test for failure of this
2079 fork() call, which would lead to the process getting stuck as it waited
2080 for a non-existent subprocess. Forks do occasionally fail when resources
2081 run out. I reviewed all the other calls to fork(); they all seem to check
2084 PH/20 When checking for unexpected SMTP input at connect time (before writing
2085 the banner), Exim was not dealing correctly with a non-positive return
2086 from the read() function. If the client had disconnected by this time,
2087 the result was a log entry for a synchronization error with an empty
2088 string after "input=" when read() returned zero. If read() returned -1
2089 (an event I could not check), uninitialized data bytes were printed.
2090 There were reports of junk text (parts of files, etc) appearing after
2093 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2095 PH/22 Added support for macro redefinition, and (re)definition in between
2096 driver and ACL definitions.
2098 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2099 forgetting to use the resulting value; it was using the unexpanded value.
2101 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2102 hadn't been configured. The fix is from Juergen Kreileder, who
2103 understands it better than I do:
2105 "Here's what I see happening with three configured cyrus_sasl
2106 authenticators configured (plain, login, cram-md5):
2108 On startup auth_cyrus_sasl_init() gets called for each of these.
2109 This means three calls to sasl_listmech() without a specified mech_list.
2110 => SASL tests which mechs of all available mechs actually work
2111 => three warnings about OTP not working
2112 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2114 With the patch, sasl_listmech() also gets called three times. But now
2115 SASL's mech_list option is set to the server_mech specified in the the
2116 authenticator. Or in other words, the answer from sasl_listmech()
2117 gets limited to just the mech you're testing for (which is different
2119 => the return list contains just 'plain' or 'login', 'cram-md5' or
2120 nothing depending on the value of ob->server_mech.
2122 I've just tested the patch: Authentication still works fine,
2123 unavailable mechs specified in the exim configuration are still
2124 caught, and the auth.log warnings about OTP are gone."
2126 PH/25 When debugging is enabled, the contents of the command line are added
2127 to the debugging output, even when log_selector=+arguments is not
2130 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2131 answer is "GNU", and only if the return is "GNU/something" is the answer
2134 PH/27 $acl_verify_message is now set immediately after the failure of a
2135 verification in an ACL, and so is available in subsequent modifiers. In
2136 particular, the message can be preserved by coding like this:
2138 warn !verify = sender
2139 set acl_m0 = $acl_verify_message
2141 Previously, $acl_verify_message was set only while expanding "message"
2142 and "log_message" when a very denied access.
2144 PH/28 Modified OS/os.c-Linux with
2146 -#ifndef OS_LOAD_AVERAGE
2147 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2149 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2150 nomenclature these days.)
2152 PH/29 Installed patch from the Sieve maintainer that adds the options
2153 sieve_useraddress and sieve_subaddress to the redirect router.
2155 PH/30 In these circumstances:
2156 . Two addresses routed to the same list of hosts;
2157 . First host does not offer TLS;
2158 . First host accepts first address;
2159 . First host gives temporary error to second address;
2160 . Second host offers TLS and a TLS session is established;
2161 . Second host accepts second address.
2162 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2163 and peerdn, if requested) that were in fact used only for the second
2166 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2167 attention to any local part prefix or suffix that was matched by the
2168 router that accepted the address. It now behaves in the same way as it
2169 does for delivery: the affixes are removed from the local part unless
2170 rcpt_include_affixes is set on the transport.
2172 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2173 timeout during the DATA phase of an incoming message.
2175 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2176 applied a patch sanctioned by the Sieve maintainer.
2178 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2179 the uid or gid is negative. A case of a negative gid caused this to be
2180 noticed. The fix allows for either to be negative.
2182 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2183 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2186 PH/36 The change PH/12 above was broken. Fixed it.
2188 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2189 the grounds that routing the same address twice would always produce the
2190 same answer. This might have been true once, but it is certainly no
2191 longer true now. Routing a child address may depend on the previous
2192 routing that produced that child. Some complicated redirection strategies
2193 went wrong when messages had multiple recipients, and made Exim's
2194 behaviour dependent on the order in which the addresses were given.
2196 I have moved the duplicate checking until after the routing is complete.
2197 Exim scans the addresses that are assigned to local and remote
2198 transports, and removes any duplicates. This means that more work will be
2199 done, as duplicates will always all be routed, but duplicates are
2200 presumably rare, so I don't expect this is of any significance.
2202 For deliveries to pipes, files, and autoreplies, the duplicate checking
2203 still happens during the routing process, since they are not going to be
2206 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2207 It corrects a timeout issue with spamd. This is Ian's comment: "The
2208 background is that sometimes spamd either never reads data from a
2209 connection it has accepted, or it never writes response data. The exiscan
2210 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2211 blindly assumes that writes won't block so it may never time out."
2213 PH/39 Allow G after quota size as well as K and M.
2215 PH/40 The value set for $authenticated_id in an authenticator may not contain
2216 binary zeroes or newlines because the value is written to log lines and
2217 to spool files. There was no check on this. Now the value is run through
2218 the string_printing() function so that such characters are converted to
2219 printable escape sequences.
2221 PH/41 $message_linecount is a new variable that contains the total number of
2222 lines in the message. Compare $body_linecount, which is the count for the
2225 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2226 bounce and delay warning messages, except in certain special cases, which
2229 (a) An SMTP error message from a remote host;
2230 (b) A message specified in a :fail: redirection;
2231 (c) A message specified in a "fail" command in a system filter;
2232 (d) A message specified in a FAIL return from the queryprogram router;
2233 (e) A message specified by the cannot_route_message router option.
2235 In these cases only, Exim does include the error details in bounce and
2236 warning messages. There are also a few cases where bland messages such
2237 as "unrouteable address" or "local delivery error" are given.
2239 PH/43 $value is now also set for the "else" part of a ${run expansion.
2241 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2242 being worked on, but at least Exim now implements the latest version to
2245 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2246 process to complete was treated as a delivery failure, a timeout while
2247 writing the message to the pipe was logged, but erroneously treated as a
2248 successful delivery. Such timeouts include transport filter timeouts. For
2249 consistency with the overall process timeout, these timeouts are now
2250 treated as errors, giving rise to delivery failures by default. However,
2251 there is now a new Boolean option for the pipe transport called
2252 timeout_defer, which, if set TRUE, converts the failures into defers for
2253 both kinds of timeout. A transport filter timeout is now identified in
2256 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2257 systems where "make" and "gmake" are different, calling "gmake" at top
2258 level broke things. I've arranged for the value of $(MAKE) to be passed
2259 from the Makefile to this script so that it can call the same version of
2263 A note about Exim versions 4.44 and 4.50
2264 ----------------------------------------
2266 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2267 changes of various kinds. As a consequence, a big documentation update was
2268 needed. This delayed the release for rather longer than seemed good, especially
2269 in the light of a couple of (minor) security issues. Therefore, the changes
2270 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2271 release. So 4.44 and 4.50 are in effect two different branches that both start
2274 I have left the 4.50 change log unchanged; it contains all the changes since
2275 4.43. The change log for 4.44 is below; many of its items are identical to
2276 those for 4.50. This seems to be the most sensible way to preserve the
2277 historical information.
2283 1. Minor wording change to the doc/README.SIEVE file.
2285 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2286 computation of the current number of files was incorrect.
2288 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2289 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2292 4. Give more explanation in the error message when the command for a transport
2293 filter fails to execute.
2295 5. There are several places where Exim runs a non-Exim command in a
2296 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2297 was being done only for the command run by the queryprogram router. It is
2298 now done for all such subprocesses. The other cases are: ${run, transport
2299 filters, and the commands run by the lmtp and pipe transports.
2301 6. Added CONFIGURE_GROUP build-time option.
2303 7. Some older OS have a limit of 256 on the maximum number of file
2304 descriptors. Exim was using setrlimit() to set 1000 as a large value
2305 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2306 systems. I've change it so that if it can't get 1000, it tries for 256.
2308 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2309 was an oversight, and furthermore, ever since the addition of extra
2310 controls (e.g. 4.43/32), the checks on when to allow different forms of
2311 "control" were broken. There should now be diagnostics for all cases when a
2312 control that does not make sense is encountered.
2314 9. Added the /retain_sender option to "control=submission".
2316 10. $recipients is now available in the predata ACL (oversight).
2318 11. Tidy the search cache before the fork to do a delivery from a message
2319 received from the command line. Otherwise the child will trigger a lookup
2320 failure and thereby defer the delivery if it tries to use (for example) a
2321 cached ldap connection that the parent has called unbind on.
2323 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2324 of $address_data from the recipient verification was clobbered by the
2325 sender verification.
2327 13. The value of address_data from a sender verification is now available in
2328 $sender_address_data in subsequent conditions in the ACL statement.
2330 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2332 15. Added a new option "connect=<time>" to callout options, to set a different
2335 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2336 was its contents. (It was OK if the option was not defined at all.)
2338 17. A "Completed" log line is now written for messages that are removed from
2339 the spool by the -Mrm option.
2341 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2342 information about exactly what failed.
2344 19. Added -dd to debug only the daemon process.
2346 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2347 handles timeouts, both on the server side and network timeouts. Renamed the
2348 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2350 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2351 It is now set to "smtps".
2353 22. $host_address is now set to the target address during the checking of
2354 ignore_target_hosts.
2356 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2357 being passed; this would have caused $sender_host_name to have been used if
2358 matching the list had actually called for a host name (not very likely,
2359 since this list is usually IP addresses). A host name is now passed as
2362 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2363 code that specifies a non-restarting handler (typically sigaction() in
2364 modern systems) in an attempt to fix a rare and obscure crash bug.
2366 25. Narrowed the window for a race in the daemon that could cause it to ignore
2367 SIGCHLD signals. This is not a major problem, because they are used only to
2368 wake it up if nothing else does.
2370 26. A malformed maildirsize file could cause Exim to calculate negative values
2371 for the mailbox size or file count. Odd effects could occur as a result.
2372 The maildirsize information is now recalculated if the size or filecount
2375 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2376 support for a long time. Removed HAVE_SYS_VFS_H.
2378 28. Installed the latest version of exipick from John Jetmore.
2380 29. In an address list, if the pattern was not a regular expression, an empty
2381 subject address (from a bounce message) matched only if the pattern was an
2382 empty string. Non-empty patterns were not even tested. This was the wrong
2383 because it is perfectly reasonable to use an empty address as part of a
2384 database query. An empty address is now tested by patterns that are
2385 lookups. However, all the other forms of pattern expect the subject to
2386 contain a local part and a domain, and therefore, for them, an empty
2387 address still always fails if the pattern is not itself empty.
2389 30. Exim went into a mad DNS loop when attempting to do a callout where the
2390 host was specified on an smtp transport, and looking it up yielded more
2391 than one IP address.
2393 31. Re-factored the code for checking spool and log partition space into a
2394 function that finds that data and another that does the check. The former
2395 is then used to implement four new variables: $spool_space, $log_space,
2396 $spool_inodes, and $log_inodes.
2398 32. The RFC2047 encoding function was originally intended for short strings
2399 such as real names; it was not keeping to the 75-character limit for
2400 encoded words that the RFC imposes. It now respects the limit, and
2401 generates multiple encoded words if necessary. To be on the safe side, I
2402 have increased the buffer size for the ${rfc2047: expansion operator from
2405 33. It is now permitted to omit both strings after an "if" condition; if the
2406 condition is true, the result is "true". As before, when the second string
2407 is omitted, a false condition yields an empty string. This makes it less
2408 cumbersome to write custom ACL and router conditions.
2410 34. Failure to deliver a bounce message always caused it to be frozen, even if
2411 there was an errors_to setting on the router. The errors_to setting is now
2414 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2415 canonical form (fully expanded) before being placed in
2416 $sender_host_address.
2418 36. The table in the code that translates DNS record types into text (T_A to
2419 "A" for instance) was missing entries for NS and CNAME. It is just possible
2420 that this could have caused confusion if both these types were looked up
2421 for the same domain, because the text type is used as part of Exim's
2422 per-process caching. But the chance of anyone hitting this buglet seems
2425 37. The dnsdb lookup has been extended in a number of ways.
2427 (1) There is a new type, "zns", which walks up the domain tree until it
2428 finds some nameserver records. It should be used with care.
2430 (2) There is a new type, "mxh", which is like "mx" except that it returns
2431 just the host names, not the priorities.
2433 (3) It is now possible to give a list of domains (or IP addresses) to be
2434 looked up. The behaviour when one of the lookups defers can be
2435 controlled by a keyword.
2437 (4) It is now possible to specify the separator character for use when
2438 multiple records are returned.
2440 38. The dnslists ACL condition has been extended: it is now possible to supply
2441 a list of IP addresses and/or domains to be looked up in a particular DNS
2444 39. Added log_selector=+queue_time_overall.
2446 40. When running the queue in the test harness, wait just a tad after forking a
2447 delivery process, to get repeatability of debugging output.
2449 41. Include certificate and key file names in error message when GnuTLS fails
2450 to set them up, because the GnuTLS error message doesn't include the name
2451 of the failing file when there is a problem reading it.
2453 42. Allow both -bf and -bF in the same test run.
2455 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2457 44. The "Exiscan patch" is now merged into the mainline Exim source.
2459 45. Sometimes the final signoff response after QUIT could fail to get
2460 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2461 < 0 before doing a fflush(). This bug looks as though it goes back to the
2462 introduction of TLS in release 3.20, but "sometimes" must have been rare
2463 because the tests only now provoked it.
2465 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2466 (this can affect the format of dates).
2468 47. exim_tidydb, when checking for the continued existence of a message for
2469 which it has found a message-specific retry record, was not finding
2470 messages that were in split spool directories. Consequently, it was
2471 deleting retry records that should have stayed in existence.
2473 48. Steve fixed some bugs in eximstats.
2475 49. The SPA authentication driver was not abandoning authentication and moving
2476 on to the next authenticator when an expansion was forced to fail,
2477 contradicting the general specification for all authenticators. Instead it
2478 was generating a temporary error. It now behaves as specified.
2480 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2481 (the order specifies the preference for clients). The order is now AES256,
2482 AES128, 3DES, ARCFOUR128.
2484 51. Small patch to Sieve code - explicitly set From: when generating an
2487 52. Exim crashed if a remote delivery caused a very long error message to be
2488 recorded - for instance if somebody sent an entire SpamAssassin report back
2489 as a large number of 550 error lines. This bug was coincidentally fixed by
2490 increasing the size of one of Exim's internal buffers (big_buffer) that
2491 happened as part of the Exiscan merge. However, to be on the safe side, I
2492 have made the code more robust (and fixed the comments that describe what
2495 53. Now that there can be additional text after "Completed" in log lines (if
2496 the queue_time_overall log selector is set), a one-byte patch to exigrep
2497 was needed to allow it to recognize "Completed" as not the last thing in
2500 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2501 patch that reportedly fixes this has been added. I am not expert enough to
2502 create a test for it. This is what the patch creator wrote:
2504 "I found a little strange behaviour of ldap code when working with
2505 Windows 2003 AD Domain, where users was placed in more than one
2506 Organization Units. When I tried to give exim partial DN, the exit code
2507 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2508 But simultaneously result of request was absolutely normal ldap result,
2509 so I produce this patch..."
2511 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2512 REFERENCE, so I have modified the code to exclude the patch when that macro
2515 55. Some experimental protocols are using DNS PTR records for new purposes. The
2516 keys for these records are domain names, not reversed IP addresses. The
2517 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2518 leaves it alone. Component reversal etc. now happens only for IP addresses.
2521 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2523 57. Double the size of the debug message buffer (to 2048) so that more of very
2524 long debug lines gets shown.
2526 58. The exicyclog utility now does better if the number of log files to keep
2527 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2529 59. Two changes related to the smtp_active_hostname option:
2531 (1) $smtp_active_hostname is now available as a variable.
2532 (2) The default for smtp_banner uses $smtp_active_hostname instead
2533 of $primary_hostname.
2535 60. The host_aton() function is supposed to be passed a string that is known
2536 to be a valid IP address. However, in the case of IPv6 addresses, it was
2537 not checking this. This is a hostage to fortune. Exim now panics and dies
2538 if the condition is not met. A case was found where this could be provoked
2539 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2540 components; fortuitously, this particular loophole had already been fixed
2541 by change 4.50/55 above.
2543 If there are any other similar loopholes, the new check in host_aton()
2544 itself should stop them being exploited. The report I received stated that
2545 data on the command line could provoke the exploit when Exim was running as
2546 exim, but did not say which command line option was involved. All I could
2547 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2548 running as the user.
2551 61. There was a buffer overflow vulnerability in the SPA authentication code
2552 (which came originally from the Samba project). I have added a test to the
2553 spa_base64_to_bits() function which I hope fixes it.
2556 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2557 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2559 63. The daemon start-up calls getloadavg() while still root for those OS that
2560 need the first call to be done as root, but it missed one case: when
2561 deliver_queue_load_max is set with deliver_drop_privilege. This is
2562 necessary for the benefit of the queue runner, because there is no re-exec
2563 when deliver_drop_privilege is set.
2565 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2566 This has been fixed.
2568 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2569 was in use, was not putting the data itself into the right store pool;
2570 consequently, it could be overwritten for a subsequent message in the same
2571 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2574 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2576 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2577 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2578 the function were treating the return as a boolean value, which happened to
2579 work because 0=false and not-0=true, but is not correct code.
2581 68. The host_aton() function was not handling scoped IPv6 addresses (those
2582 with, for example, "%eth0" on the end) correctly.
2584 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2585 negated items (that is, ~something) in unsigned ints. Some compilers
2586 apparently mutter when there is no cast.
2588 70. If an address verification called from an ACL failed, and did not produce a
2589 user-specific message (i.e. there was only a "system" message), nothing was
2590 put in $acl_verify_message. In this situation, it now puts the system
2593 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2594 session; change 4.31/43 added the unwanted input to the log line - except
2595 that it did not do this in the start of session case. It now does.
2597 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2598 This is wrong and can cause the other end to generate a synchronization
2599 error if it is another Exim or anything else that does the synchronization
2600 check. A QUIT command is no longer sent after a timeout.
2602 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2603 during host lookups.
2605 74. The defer_ok option of callout verification was not working if it was used
2606 when verifying addresses in header lines, that is, for this case:
2608 verify = header_sender/callout=defer_ok
2610 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2611 those file descriptors could be used for SMTP connections. If anything
2612 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2613 could be sent to the SMTP client, causing chaos. The daemon now opens
2614 stdin, stdout, and stderr to /dev/null when it puts itself into the
2617 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2618 log by default. The user can override this with suitable Perl magic.
2620 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2621 the log message when discard triggers, was not working for the DATA ACL or
2622 for the non-SMTP ACL.
2624 78. Error message wording change in sieve.c.
2626 79. If smtp_accept_max_per_host was set, the number of connections could be
2627 restricted to fewer than expected, because the daemon was trying to set up
2628 a new connection before checking whether the processes handling previous
2629 connections had finished. The check for completed processes is now done
2630 earlier. On busy systems, this bug wouldn't be noticed because something
2631 else would have woken the daemon, and it would have reaped the completed
2634 80. If a message was submitted locally by a user whose login name contained one
2635 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2636 It caused a spool format error. I have fixed the spool reading code. A
2637 related problem was that the "from" clause in the Received: line became
2638 illegal because of the space(s). It is now covered by ${quote_local_part.
2640 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2643 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2645 83. Patch from Sieve maintainer to fix unterminated string problem in
2646 "vacation" handling.
2648 84. Some minor changes to the Linux configuration files to help with other
2649 OS variants using glibc.
2651 85. One more patch for Sieve to update vacation handling to latest spec.
2654 ----------------------------------------------------
2655 See the note above about the 4.44 and 4.50 releases.
2656 ----------------------------------------------------
2662 1. Change 4.43/35 introduced a bug that caused file counts to be
2663 incorrectly computed when quota_filecount was set in an appendfile
2666 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2667 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2670 3. Give more explanation in the error message when the command for a transport
2671 filter fails to execute.
2673 4. There are several places where Exim runs a non-Exim command in a
2674 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2675 was being done only for the command run by the queryprogram router. It is
2676 now done for all such subprocesses. The other cases are: ${run, transport
2677 filters, and the commands run by the lmtp and pipe transports.
2679 5. Some older OS have a limit of 256 on the maximum number of file
2680 descriptors. Exim was using setrlimit() to set 1000 as a large value
2681 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2682 systems. I've change it so that if it can't get 1000, it tries for 256.
2684 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2685 was an oversight, and furthermore, ever since the addition of extra
2686 controls (e.g. 4.43/32), the checks on when to allow different forms of
2687 "control" were broken. There should now be diagnostics for all cases when a
2688 control that does not make sense is encountered.
2690 7. $recipients is now available in the predata ACL (oversight).
2692 8. Tidy the search cache before the fork to do a delivery from a message
2693 received from the command line. Otherwise the child will trigger a lookup
2694 failure and thereby defer the delivery if it tries to use (for example) a
2695 cached ldap connection that the parent has called unbind on.
2697 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2698 of $address_data from the recipient verification was clobbered by the
2699 sender verification.
2701 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2702 was its contents. (It was OK if the option was not defined at all.)
2704 11. A "Completed" log line is now written for messages that are removed from
2705 the spool by the -Mrm option.
2707 12. $host_address is now set to the target address during the checking of
2708 ignore_target_hosts.
2710 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2711 being passed; this would have caused $sender_host_name to have been used if
2712 matching the list had actually called for a host name (not very likely,
2713 since this list is usually IP addresses). A host name is now passed as
2716 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2717 code that specifies a non-restarting handler (typically sigaction() in
2718 modern systems) in an attempt to fix a rare and obscure crash bug.
2720 15. Narrowed the window for a race in the daemon that could cause it to ignore
2721 SIGCHLD signals. This is not a major problem, because they are used only to
2722 wake it up if nothing else does.
2724 16. A malformed maildirsize file could cause Exim to calculate negative values
2725 for the mailbox size or file count. Odd effects could occur as a result.
2726 The maildirsize information is now recalculated if the size or filecount
2729 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2730 support for a long time. Removed HAVE_SYS_VFS_H.
2732 18. Updated exipick to current release from John Jetmore.
2734 19. Allow an empty sender to be matched against a lookup in an address list.
2735 Previously the only cases considered were a regular expression, or an
2738 20. Exim went into a mad DNS lookup loop when doing a callout where the
2739 host was specified on the transport, if the DNS lookup yielded more than
2742 21. The RFC2047 encoding function was originally intended for short strings
2743 such as real names; it was not keeping to the 75-character limit for
2744 encoded words that the RFC imposes. It now respects the limit, and
2745 generates multiple encoded words if necessary. To be on the safe side, I
2746 have increased the buffer size for the ${rfc2047: expansion operator from
2749 22. Failure to deliver a bounce message always caused it to be frozen, even if
2750 there was an errors_to setting on the router. The errors_to setting is now
2753 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2754 canonical form (fully expanded) before being placed in
2755 $sender_host_address.
2757 24. Updated eximstats to version 1.33
2759 25. Include certificate and key file names in error message when GnuTLS fails
2760 to set them up, because the GnuTLS error message doesn't include the name
2761 of the failing file when there is a problem reading it.
2763 26. Expand error message when OpenSSL has problems setting up cert/key files.
2766 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2767 (this can affect the format of dates).
2769 28. exim_tidydb, when checking for the continued existence of a message for
2770 which it has found a message-specific retry record, was not finding
2771 messages that were in split spool directories. Consequently, it was
2772 deleting retry records that should have stayed in existence.
2774 29. eximstats updated to version 1.35
2775 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2776 1.35 - bugfix such that pie charts by volume are generated correctly
2778 30. The SPA authentication driver was not abandoning authentication and moving
2779 on to the next authenticator when an expansion was forced to fail,
2780 contradicting the general specification for all authenticators. Instead it
2781 was generating a temporary error. It now behaves as specified.
2783 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2784 (the order specifies the preference for clients). The order is now AES256,
2785 AES128, 3DES, ARCFOUR128.
2787 31. Small patch to Sieve code - explicitly set From: when generating an
2790 32. Exim crashed if a remote delivery caused a very long error message to be
2791 recorded - for instance if somebody sent an entire SpamAssassin report back
2792 as a large number of 550 error lines. This bug was coincidentally fixed by
2793 increasing the size of one of Exim's internal buffers (big_buffer) that
2794 happened as part of the Exiscan merge. However, to be on the safe side, I
2795 have made the code more robust (and fixed the comments that describe what
2798 33. Some experimental protocols are using DNS PTR records for new purposes. The
2799 keys for these records are domain names, not reversed IP addresses. The
2800 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2801 leaves it alone. Component reversal etc. now happens only for IP addresses.
2804 34. The host_aton() function is supposed to be passed a string that is known
2805 to be a valid IP address. However, in the case of IPv6 addresses, it was
2806 not checking this. This is a hostage to fortune. Exim now panics and dies
2807 if the condition is not met. A case was found where this could be provoked
2808 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2809 components; fortuitously, this particular loophole had already been fixed
2810 by change 4.50/55 or 4.44/33 above.
2812 If there are any other similar loopholes, the new check in host_aton()
2813 itself should stop them being exploited. The report I received stated that
2814 data on the command line could provoke the exploit when Exim was running as
2815 exim, but did not say which command line option was involved. All I could
2816 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2817 running as the user.
2820 35. There was a buffer overflow vulnerability in the SPA authentication code
2821 (which came originally from the Samba project). I have added a test to the
2822 spa_base64_to_bits() function which I hope fixes it.
2825 36. The daemon start-up calls getloadavg() while still root for those OS that
2826 need the first call to be done as root, but it missed one case: when
2827 deliver_queue_load_max is set with deliver_drop_privilege. This is
2828 necessary for the benefit of the queue runner, because there is no re-exec
2829 when deliver_drop_privilege is set.
2831 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2832 was in use, was not putting the data itself into the right store pool;
2833 consequently, it could be overwritten for a subsequent message in the same
2834 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2837 38. Sometimes the final signoff response after QUIT could fail to get
2838 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2839 < 0 before doing a fflush(). This bug looks as though it goes back to the
2840 introduction of TLS in release 3.20, but "sometimes" must have been rare
2841 because the tests only now provoked it.
2847 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2848 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2849 Now it returns an integer. A number of calls were still expecting a T/F
2850 return. Fortuitously, in all cases, the tests worked in OK situations,
2851 which is the norm. However, things would have gone wrong on any write
2852 failures on the smtp file descriptor. This function is used when sending
2853 messages over SMTP and also when doing verify callouts.
2855 2. When Exim is called to do synchronous delivery of a locally submitted
2856 message (the -odf or -odi options), it no longer closes stderr before doing
2859 3. Implemented the mua_wrapper option.
2861 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2863 5. Implemented the functions header_remove(), header_testname(),
2864 header_add_at_position(), and receive_remove_recipient(), and exported them
2867 6. If an ACL "warn" statement specified the addition of headers, Exim already
2868 inserted X-ACL-Warn: at the start if there was no header name. However, it
2869 was not making this test for the second and subsequent header lines if
2870 there were newlines in the string. This meant that an invalid header could
2871 be inserted if Exim was badly configured.
2873 7. Allow an ACL "warn" statement to add header lines at the start or after all
2874 the Received: headers, as well as at the end.
2876 8. Added the rcpt_4xx retry error code.
2878 9. Added postmaster_mailfrom=xxx to callout verification option.
2880 10. Added mailfrom=xxxx to the callout verification option, for verify=
2883 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2884 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2886 12. Inserted some casts to stop certain compilers warning when using pointer
2887 differences as field lengths or precisions in printf-type calls (mostly
2888 affecting debugging statements).
2890 13. Added optional readline() support for -be (dynamically loaded).
2892 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2893 same clock tick as a message's arrival, so that its received time was the
2894 same as the "first fail" time on the retry record, and that message
2895 remained on the queue past the ultimate address timeout, every queue runner
2896 would try a delivery (because it was past the ultimate address timeout) but
2897 after another failure, the ultimate address timeout, which should have then
2898 bounced the address, did not kick in. This was a "< instead of <=" error;
2899 in most cases the first failure would have been in the next clock tick
2900 after the received time, and all would be well.
2902 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2903 being recognized when the domain list was tested by the match_domain
2904 condition in an expansion string.
2906 16. Added the ${str2b64: operator.
2908 17. Exim was always calling setrlimit() to set a large limit for the number of
2909 processes, without checking whether the existing limit was already
2910 adequate. (It did check for the limit on file descriptors.) Furthermore,
2911 errors from getrlimit() and setrlimit() were being ignored. Now they are
2912 logged to the main and panic logs, but Exim does carry on, to try to do its
2913 job under whatever limits there are.
2915 18. Imported PCRE 5.0.
2917 19. Trivial typo in log message " temporarily refused connection" (the leading
2920 20. If the log selector return_path_on_delivery was set and an address was
2921 redirected to /dev/null, the delivery process crashed because it assumed
2922 that a return path would always be set for a "successful" delivery. In this
2923 case, the whole delivery is bypassed as an optimization, and therefore no
2926 21. Internal re-arrangement: the function for sending a challenge and reading
2927 a response while authentication was assuming a zero-terminated challenge
2928 string. It's now changed to take a pointer and a length, to allow for
2929 binary data in such strings.
2931 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2933 23. Exim was not respecting finduser_retries when seeking the login of the
2934 uid under which it was called; it was always trying 10 times. (The default
2935 setting of finduser_retries is zero.) Also, it was sleeping after the final
2936 failure, which is pointless.
2938 24. Implemented tls_on_connect_ports.
2940 25. Implemented acl_smtp_predata.
2942 26. If the domain in control=submission is set empty, Exim assumes that the
2943 authenticated id is a complete email address when it generates From: or
2944 Sender: header lines.
2946 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2947 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2948 chown and chgrp in /bin and hostname in /usr/bin.
2950 28. Exim was keeping the "process log" file open after each use, just as it
2951 does for the main log. This opens the possibility of it remaining open for
2952 long periods when the USR1 signal hits a daemon. Occasional processlog
2953 errors were reported, that could have been caused by this. Anyway, it seems
2954 much more sensible not to leave this file open at all, so that is what now
2957 29. The long-running daemon process does not normally write to the log once it
2958 has entered its main loop, and it closes the log before doing so. This is
2959 so that log files can straightforwardly be renamed and moved. However,
2960 there are a couple of unusual error situations where the daemon does write
2961 log entries, and I had neglected to close the log afterwards.
2963 30. The text of an SMTP error response that was received during a remote
2964 delivery was being truncated at 512 bytes. This is too short for some of
2965 the long messages that one sometimes sees. I've increased the limit to
2968 31. It is now possible to make retry rules that apply only when a message has a
2969 specific sender, in particular, an empty sender.
2971 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2972 it possible to be selective about when SMTP synchronization is enforced.
2974 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2976 32. Implemented hosts_connection_nolog.
2978 33. Added an ACL for QUIT.
2980 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2983 35. Added mailbox_size and mailbox_filecount to appendfile.
2985 36. Added control = no_multiline_responses to ACLs.
2987 37. There was a bug in the logic of the code that waits for the clock to tick
2988 in the case where the clock went backwards by a substantial amount such
2989 that the microsecond fraction of "now" was more than the microsecond
2990 fraction of "then" (but the whole seconds number was less).
2992 38. Added support for the libradius Radius client library this is found on
2993 FreeBSD (previously only the radiusclient library was supported).
2999 1. When certain lookups returned multiple values in the form name=value, the
3000 quoting of the values was not always being done properly. Specifically:
3001 (a) If the value started with a double quote, but contained no whitespace,
3003 (b) If the value contained whitespace other than a space character (i.e.
3004 tabs or newlines or carriage returns) it was not quoted.
3005 This fix has been applied to the mysql and pgsql lookups by writing a
3006 separate quoting function and calling it from the lookup code. The fix
3007 should probably also be applied to nisplus, ibase and oracle lookups, but
3008 since I cannot test any of those, I have not disturbed their existing code.
3010 2. A hit in the callout cache for a specific address caused a log line with no
3011 reason for rejecting RCPT. Now it says "Previous (cached) callout
3012 verification failure".
3014 3. There was an off-by-one bug in the queryprogram router. An over-long
3015 return line was truncated at 256 instead of 255 characters, thereby
3016 overflowing its buffer with the terminating zero. As well as fixing this, I
3017 have increased the buffer size to 1024 (and made a note to document this).
3019 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3020 when Exim is waiting for an SMTP response from a remote server, Exim
3021 restarts its select() call on the socket, thereby resetting its timeout.
3022 This is not a problem when such interrupts are rare. Somebody set up a cron
3023 job to run exiwhat every 2 minutes, which is less than the normal select()
3024 timeout (5 or 10 minutes). This meant that the select() timeout never
3025 kicked in because it was always reset. I have fixed this by comparing the
3026 time when an interrupt arrives with the time at the start of the first call
3027 to select(). If more time than the timeout has elapsed, the interrupt is
3028 treated as a timeout.
3030 5. Some internal re-factoring in preparation for the addition of Sieve
3031 extensions (by MH). In particular, the "personal" test is moved to a
3032 separate function, and given an option for scanning Cc: and Bcc: (which is
3033 not set for Exim filters).
3035 6. When Exim created an email address using the login of the caller as the
3036 local part (e.g. when creating a From: or Sender: header line), it was not
3037 quoting the local part when it contained special characters such as @.
3039 7. Installed new OpenBSD configuration files.
3041 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3042 try to make them clearer.
3044 9. Callout options, other than the timeout value, were being ignored when
3045 verifying sender addresses in header lines. For example, when using
3047 verify = header_sender/callout=no_cache
3049 the cache was (incorrectly) being used.
3051 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3052 only the Cygwin environment.
3054 11. When return_path_on_delivery was set as a log selector, if different remote
3055 addresses in the same message used different return paths and parallel
3056 remote delivery occurred, the wrong values would sometimes be logged.
3057 (Whenever a remote delivery process finished, the return path value from
3058 the most recently started remote delivery process was logged.)
3060 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3061 lines when AUTH and/or TLS are in use. This is the "received protocol"
3062 field. Exim used to use "asmtp" for authenticated SMTP, without any
3063 indication (in the protocol name) for TLS use. Now it follows the RFC and
3064 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3065 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3066 names appear in log lines as well as in Received: header lines.
3068 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3069 extensions, and comparison tests, and to fix some bugs.
3071 14. Changes to the "personal" filter test:
3073 (1) The test was buggy in that it was just doing the equivalent of
3074 "contains" tests on header lines. For example, if a user's address was
3075 anne@some.where, the "personal" test would incorrectly be true for
3077 To: susanne@some.where
3079 This test is now done by extracting each address from the header in turn,
3080 and checking the entire address. Other tests that are part of "personal"
3081 are now done using regular expressions (for example, to check local parts
3082 of addresses in From: header lines).
3084 (2) The list of non-personal local parts in From: addresses has been
3085 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3086 taken from the Sieve specification recommendations.
3088 (3) If the message contains any header line starting with "List-" it is
3089 treated as non-personal.
3091 (4) The test for "circular" in the Subject: header line has been removed
3092 because it now seems ill-conceived.
3094 15. Minor typos in src/EDITME comments corrected.
3096 16. Installed latest exipick from John Jetmore.
3098 17. If headers_add on a router specified a text string that was too long for
3099 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3100 of string_sprintf() is now avoided.
3102 18. $message_body_size was not set (it was always zero) when running the DATA
3103 ACL and the local_scan() function.
3105 19. For the "mail" command in an Exim filter, no default was being set for
3106 the once_repeat time, causing a random time value to be used if "once" was
3107 specified. (If the value happened to be <= 0, no repeat happened.) The
3108 default is now 0s, meaning "never repeat". The "vacation" command was OK
3109 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3110 (I found it when inspecting the code).
3112 20. There is now an overall timeout for performing a callout verification. It
3113 defaults to 4 times the callout timeout, which applies to individual SMTP
3114 commands during the callout. The overall timeout applies when there is more
3115 than one host that can be tried. The timeout is checked before trying the
3116 next host. This prevents very long delays if there are a large number of
3117 hosts and all are timing out (e.g. when the network connections are timing
3118 out). The value of the overall timeout can be changed by specifying an
3119 additional sub-option for "callout", called "maxwait". For example:
3121 verify = sender/callout=5s,maxwait=20s
3123 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3124 to the end before writing, but this should make it even safer).
3126 22. Exim was forgetting that it had advertised PIPELINING for the second and
3127 subsequent messages on an SMTP connection. It was also not resetting its
3128 memory on STARTTLS and an internal HELO.
3130 23. When Exim logs an SMTP synchronization error within a session, it now
3131 records whether PIPELINING has been advertised or not.
3133 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3134 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3135 rather than long int.
3137 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3139 26. Added the never_mail option to autoreply.
3145 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3146 crash if the getsockname() call failed; this can happen if a connection is
3147 closed very soon after it is established. The problem was simply in the
3148 order in which certain operations were done, causing Exim to try to write
3149 to the SMTP stream before it had set up the file descriptor. The bug has
3150 been fixed by making things happen in the correct order.
3156 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3157 before the connection was closed, thus losing the rejection response.
3159 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3160 some early Solaris releases, but causes trouble in current releases where
3161 socklen_t is defined.
3163 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3166 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3169 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3170 that releasing the top of it at the end releases what was used for sub-
3171 expansions (unless the block got too big). However, discard this block if
3172 the first thing is a variable or header, so that we can use its block when
3173 it is dynamic (useful for very large $message_headers, for example).
3175 6. Lookups now cache *every* query, not just the most recent. A new, separate
3176 store pool is used for this. It can be recovered when all lookup caches are
3177 flushed. Lookups now release memory at the end of their result strings.
3178 This has involved some general refactoring of the lookup sources.
3180 7. Some code has been added to the store_xxx() functions to reduce the amount
3181 of flapping under certain conditions.
3183 8. log_incoming_interface used to affect only the <= reception log lines. Now
3184 it causes the local interface and port to be added to several more SMTP log
3185 lines, for example "SMTP connection from", and rejection lines.
3187 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3189 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3191 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3192 could be overwritten at the end of the current message (or the start of a
3193 new message if it was set in a HELO ACL). The value is now preserved for
3194 the duration of the SMTP connection.
3196 12. If a transport had a headers_rewrite setting, and a matching header line
3197 contained an unqualified address, that address was qualified, even if it
3198 did not match any rewriting rules. The underlying bug was that the values
3199 of the flags that permit the existence of unqualified sender and recipient
3200 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3201 non-local messages, and by -bnq for local messages) were not being
3202 preserved with the message after it was received.
3204 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3205 "next input=" as part of the text comprising the host identity instead of
3206 the correct text. The code was using the same buffer for two different
3207 strings. However, depending on which order the printing function evaluated
3208 its arguments, the bug did not always show up. Under Linux, for example, my
3209 test suite worked just fine.
3211 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3212 doesn't work with some older versions of Perl. It has been changed to "my",
3213 which in any case is probably the better facility to use.
3215 15. A really picky compiler found some instances of statements for creating
3216 error messages that either had too many or two few arguments for the format
3219 16. The size of the buffer for calls to the DNS resolver has been increased
3220 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3221 for addresses that have a lot of PTR records. This alleviates a problem; it
3222 does not fully solve it.
3224 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3225 buffer now truncates the list and logs the incident, which is the same
3226 action as happens when Exim is looking up a host name and its aliases.
3227 Previously in this situation something unpredictable would happen;
3228 sometimes it was "internal error: store_reset failed".
3230 18. If a server dropped the connection unexpectedly when an Exim client was
3231 using GnuTLS and trying to read a response, the client delivery process
3232 crashed while trying to generate an error log message.
3234 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3235 string, for example:
3237 warn message = H1: something\nH2: something
3239 the text was added as a single header line from Exim's point of view
3240 though it ended up OK in the delivered message. However, searching for the
3241 second and subsequent header lines using $h_h2: did not work. This has been
3242 fixed. Similarly, if a system filter added multiple headers in this way,
3243 the routers could not see them.
3245 20. Expanded the error message when iplsearch is called with an invalid key to
3246 suggest using net-iplsearch in a host list.
3248 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3249 ACLs are no longer actually imposed (and a message to that effect is
3252 22. If a "gecos" field in a passwd entry contained escaped characters, in
3253 particular, if it contained a \" sequence, Exim got it wrong when building
3254 a From: or a Sender: header from that name. A second bug also caused
3255 incorrect handling when an unquoted " was present following a character
3256 that needed quoting.
3258 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3259 was not being matched caselessly.
3261 24. Arranged for all hyphens in the exim.8 source to be escaped with
3264 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3265 properly. Recipient callout cache records were still being keyed to include
3266 the sender, even when use_sender was set false. This led to far more
3267 callouts that were necessary. The sender is no longer included in the key
3268 when use_sender is false.
3270 26. Added "control = submission" modifier to ACLs.
3272 27. Added the ${base62d: operator to decode base 62 numbers.
3274 28. dnsdb lookups can now access SRV records.
3276 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3277 the configuration file.
3279 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3280 (-v) mode. This makes the output for a verbose queue run more intelligible.
3282 31. Added a use_postmaster feature to recipient callouts.
3284 32. Added the $body_zerocount variable, containing the number of binary zero
3285 bytes in the message body.
3287 33. The time of last modification of the "new" subdirectory is now used as the
3288 "mailbox time last read" when there is a quota error for a maildir
3291 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3293 35. Added +ignore_unknown as a special item in host lists.
3295 36. Code for decoding IPv6 addresses in host lists is now included, even if
3296 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3297 address was recognized as an IP address, but was then not correctly decoded
3298 into binary, causing unexpected and incorrect effects when compared with
3305 1. Very minor rewording of debugging text in manualroute to say "list of
3306 hosts" instead of "hostlist".
3308 2. If verify=header_syntax was set, and a header line with an unqualified
3309 address (no domain) and a large number of spaces between the end of the
3310 name and the colon was received, the reception process suffered a buffer
3311 overflow, and (when I tested it) crashed. This was caused by some obsolete
3312 code that should have been removed. The fix is to remove it!
3314 3. When running in the test harness, delay a bit after writing a bounce
3315 message to get a bit more predictability in the log output.
3317 4. Added a call to search_tidyup() just before forking a reception process. In
3318 theory, someone could use a lookup in the expansion of smtp_accept_max_
3319 per_host which, without the tidyup, could leave open a database connection.
3321 5. Added the variables $recipient_data and $sender_data which get set from a
3322 lookup success in an ACL "recipients" or "senders" condition, or a router
3323 "senders" option, similar to $domain_data and $local_part_data.
3325 6. Moved the writing of debug_print from before to after the "senders" test
3328 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3329 problems for message scanning, either using a data ACL, or using
3330 local_scan() because the Received: header was not generated till after they
3331 were called (in order to set the time as the time of reception completion).
3332 I have revised the way this works. The header is now generated after the
3333 body is received, but before the ACL or local_scan() are called. After they
3334 are run, the timestamp in the header is updated.
3340 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3341 before starting a queue runner without re-exec. This happened only when
3342 deliver_drop_privilege was set or when the Exim user was set to root. The
3343 effect of the bug was that timeouts during subsequent deliveries caused
3344 crashes instead of being properly handled. The handler is now left at its
3345 default (and expected) setting.
3347 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3348 message, again when deliver_drop_privilege is set or Exim is run as root.
3349 The bug described in (1) was not present in this case, but the tidying up
3350 of the other signals was missing. I have made the two cases consistent.
3352 3. The ignore_target_hosts setting on a manualroute router was being ignored
3353 for hosts that were looked up using the /MX notation.
3355 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3358 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3359 operated on the sender address. After changing the $sender_address to <>
3360 for the sender address verify, Exim was re-instated it as the original
3361 (before rewriting) address, but remembering that it had rewritten it, so it
3362 wasn't rewriting it again. This bug also had the effect of breaking the
3363 sender address verification caching when the sender address was rewritten.
3365 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3366 This has been changed so that if the ip literal address matches
3367 ignore_target_hosts, the router declines.
3369 7. Added expansion conditions match_domain, match_address, and match_local_
3370 part (NOT match_host).
3372 8. The placeholder for the Received: header didn't have a length field set.
3374 9. Added code to Exim itself and to exim_lock to test for a specific race
3375 condition that could lead to file corruption when using MBX delivery. The
3376 issue is with the lockfile that is created in /tmp. If this file is removed
3377 after a process has opened it but before that process has acquired a lock,
3378 there is the potential for a second process to recreate the file and also
3379 acquire a lock. This could lead to two Exim processes writing to the file
3380 at the same time. The added code performs the same test as UW imapd; it
3381 checks after acquiring the lock that its file descriptor still refers to
3382 the same named file.
3384 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3385 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3388 11. Added the smtp_active_hostname option. If used, this will typically be made
3389 to depend on the incoming interface address. Because $interface_address is
3390 not set up until the daemon has forked a reception process, error responses
3391 that can happen earlier (such as "too many connections") no longer contain
3394 12. If an expansion in a condition on a "warn" statement fails because a lookup
3395 defers, the "warn" statement is abandoned, and the next ACL statement is
3396 processed. Previously this caused the whole ACL to be aborted.
3398 13. Added the iplsearch lookup type.
3400 14. Added ident_timeout as a log selector.
3402 15. Added tls_certificate_verified as a log selector.
3404 16. Added a global option tls_require_ciphers (compare the smtp transport
3405 option of the same name). This controls incoming TLS connections.
3407 17. I finally figured out how to make tls_require_ciphers do a similar thing
3408 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3409 before starting the TLS session.
3411 18. Tabs are now shown as \t in -bP output.
3413 19. If the log selector return_path_on_delivery was set, Exim crashed when
3414 bouncing a message because it had too many Received: header lines.
3416 20. If two routers both had headers_remove settings, and the first one included
3417 a superfluous trailing colon, the final name in the first list and the
3418 first name in the second list were incorrectly joined into one item (with a
3419 colon in the middle).
3425 1. Added -C and -D options to the exinext utility, mainly to make it easier
3426 to include in the automated testing, but these could be helpful when
3427 multiple configurations are in use.
3429 2. The exinext utility was not formatting the output nicely when there was
3430 an alternate port involved in the retry record key, nor when there was a
3431 message id as well (for retries that were specific to a specific message
3432 and a specific host). It was also confused by IPv6 addresses, because of
3433 the additional colons they contain. I have fixed the IPv4 problem, and
3434 patched it up to do a reasonable job for IPv6.
3436 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3437 delivery, the log line now contains "pipelined" if PIPELINING was used.
3439 4. An SMTP transport process used to panic and die if the bind() call to set
3440 an explicit outgoing interface failed. This has been changed; it is now
3441 treated in the same way as a connect() failure.
3443 5. A reference to $sender_host_name in the part of a conditional expansion
3444 that was being skipped was still causing a DNS lookup. This no longer
3447 6. The def: expansion condition was not recognizing references to header lines
3448 that used bh_ and bheader_.
3450 7. Added the _cache feature to named lists.
3452 8. The code for checking quota_filecount in the appendfile transport was
3453 allowing one more file than it should have been.
3455 9. For compatibility with Sendmail, the command line option
3463 and sets the incoming protocol and host name (for trusted callers). The
3464 host name and its colon can be omitted when only the protocol is to be set.
3465 Note the Exim already has two private options, -pd and -ps, that refer to
3466 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3467 "s", but I don't think that's a major issue.
3469 10. A number of refactoring changes to the code, none of which should affect
3472 (a) The number of logging options was getting close to filling up the
3473 32-bit word that was used as a bit map. I have split them into two classes:
3474 those that are passed in the argument to log_write(), and those that are
3475 only ever tested independently outside of that function. These are now in
3476 separate 32-bit words, so there is plenty of room for expansion again.
3477 There is no change in the user interface or the logging behaviour.
3479 (b) When building, for example, log lines, the code previously used a
3480 macro that called string_cat() twice, in order to add two strings. This is
3481 not really sufficiently general. Furthermore, there was one instance where
3482 it was actually wrong because one of the argument was used twice, and in
3483 one call a function was used. (As it happened, calling the function twice
3484 did not affect the overall behaviour.) The macro has been replaced by a
3485 function that can join an arbitrary number of extra strings onto a growing
3488 (c) The code for expansion conditions now uses a table and a binary chop
3489 instead of a serial search (which was left over from when there were very
3490 few conditions). Also, it now recognizes conditions like "pam" even when
3491 the relevant support is not compiled in: a suitably worded error message is
3492 given if an attempt is made to use such a condition.
3494 11. Added ${time_interval:xxxxx}.
3496 12. A bug was causing one of the ddress fields not to be passed back correctly
3497 from remote delivery subprocesses. The field in question was not being
3498 subsequently used, so this caused to problems in practice.
3500 13. Added new log selectors queue_time and deliver_time.
3502 14. Might have fixed a bug in maildirsizefile handling that threw up
3503 "unexpected character" debug warnings, and recalculated the data
3504 unnecessarily. In any case, I expanded the warning message to give more
3507 15. Added the message "Restricted characters in address" to the statements in
3508 the default ACL that block characters like @ and % in local parts.
3510 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3511 Three changes have been made:
3513 (a) There was a serious bug; a negative response to MAIL caused the whole
3514 recipient domain to be cached as invalid, thereby blocking all messages
3515 to all local parts at the same domain, from all senders. This bug has
3516 been fixed. The domain is no longer cached after a negative response to
3517 MAIL if the sender used is not empty.
3519 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3522 (c) A new callout option, "use_sender" has been added for people who want
3523 the modified behaviour.
3529 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3532 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3533 indeed breaks things for older releases.
3535 3. Added additional logging to the case where there is a problem reading data
3536 from a filter that is running in a subprocess using a pipe, in order to
3537 try to track down a specific problem.
3539 4. Testing facility fudge: when running in the test harness and attempting
3540 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3541 getting "No route to host". Convert this to a timeout.
3543 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3546 6. Some OS don't have socklen_t but use size_t instead. This affects the
3547 fifth argument of getsockopt() amongst other things. This is now
3548 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3549 can be set for individual OS. I have set it for SunOS5, OSF1, and
3550 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3551 some earlier ones do not.
3553 7. Change 4.30/15 was not doing the test caselessly.
3555 8. The standard form for an IPv6 address literal was being rejected by address
3556 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3557 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3558 this, as well as the form without the "IPv6" on the front (but only when
3559 address literals are enabled, of course).
3561 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3563 10. Exim crashed if a message with an empty sender address specified by -f
3564 encountered a router with an errors_to setting. This could be provoked only
3565 by a command such as
3569 where an empty string was supplied; "<>" did not hit this bug.
3571 11. Installed PCRE release 4.5.
3573 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3574 remained set. It is now erased.
3576 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3577 times from message ids (which are base 36 rather than the normal 62).
3579 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3580 were being counted as actual protocol errors, and logged if the log
3581 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3582 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3583 and DATA following a set of rejected RCPTs do not count as protocol errors.
3584 In other words, Exim assumes they were pipelined, though this may not
3585 actually be the case. Of course, in all cases the client gets an
3586 appropriate error code.
3588 15. If a lookup fails in an ACL condition, a message about the failure may
3589 be available; it is used if testing the ACL cannot continue, because most
3590 such messages specify what the cause of the deferral is. However, some
3591 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3592 that caused an old message to be retained and used if a later statement
3593 caused a defer, replacing the real cause of the deferral.
3595 16. If an IP address had so many PTR records that the DNS lookup buffer
3596 was not large enough to hold them, Exim could crash while trying to process
3597 the truncated data. It now detects and logs this case.
3599 17. Further to 4.21/58, another change has been made: if (and only if) the
3600 first line of a message (the first header line) ends with CRLF, a bare LF
3601 in a subsequent header line has a space inserted after it, so as not to
3602 terminate the header.
3604 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3605 unnecessarily, used atoi() instead of strtol(), and didn't check the
3606 termination when getting file sizes from file names by regex.
3608 19. Completely re-implemented the support for maildirsize files, in the light
3609 of a number of problems with the previous contributed implementation
3610 (4.30/29). In particular:
3612 . If the quota is zero, the maildirsize file is maintained, but no quota is
3615 . If the maildir directory does not exist, it is created before any attempt
3616 to write a maildirsize file.
3618 . The quota value in the file is just a cache; if the quota is changed in
3619 the transport, the new value overrides.
3621 . A regular expression is available for excluding directories from the
3624 20. The autoreply transport checks the characters in options that define the
3625 message's headers; it allows continued headers, but it was checking with
3626 isspace() after an embedded newline instead of explicitly looking for a
3629 21. If all the "regular" hosts to which an address was routed had passed their
3630 expiry times, and had not reached their retry times, the address was
3631 bounced, even if fallback hosts were defined. Now Exim should go on to try
3634 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3635 equivalent code in the SMTP transport. Some hosts send humungous responses
3636 to HELO/EHLO, more than 1024 it seems.
3638 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3639 gives compiler warnings in some environments. I've now done it "properly",
3642 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3643 (because of problems with the built-in one) was declared to return uschar *
3644 instead of char *, causing compiler failure.
3646 25. Fixed a file descriptor leak when processing alias/forward files.
3648 26. Fixed a minor format string issue in dbfn.c.
3650 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3652 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3653 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3656 29. When a sender address is verified, it is cached, to save repeating the test
3657 when there is more than one recipient in a message. However, when the
3658 verification involves a callout, it is possible for different callout
3659 options to be set for different recipients. It is too complicated to keep
3660 track of this in the cache, so now Exim always runs a verification when a
3661 callout is required, relying on the callout cache for the optimization.
3662 The overhead is duplication of the address routing, but this should not be
3665 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3666 to be verified with callout=postmaster, and the main callout worked but the
3667 postmaster check failed, the verification correctly failed. However, if a
3668 subsequent RCPT command asked for sender verification *without* the
3669 postmaster check, incorrect caching caused this verification also to fail,
3672 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3673 it was not caching the DNS options (qualify_single, search_parents) that
3674 were used when the lookup failed. A subsequent lookup with different
3675 options therefore always gave the same answer, though there were cases
3676 where it should not have. (Example: a "domains = !$mx_any" option on a
3677 dnslookup router: the "domains" option is always processed without any
3678 widening, but the router might have qualify_single set.) Now Exim uses the
3679 cached value only when the same options are set.
3681 32. Added John Jetmore's "exipick" utility to the distribution.
3683 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3684 than a timeout (e.g. a certificate is required, and is not provided), an
3685 Exim server now closes the connection immediately. Previously it waited for
3686 the client to close - but if the client is SSL, it seems that they each
3687 wait for each other, leading to a delay before one of them times out.
3689 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3690 maintained 0.8.x compatibility because I don't think many are using it, and
3691 it is clearly obsolete.
3693 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3696 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3697 client certificate was expired. A simple patch fixes this, though I don't
3698 understand the full logic of why the verify callback is called multiple
3701 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3702 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3703 which causes problems with some clients (such as the Certicom SSL Plus
3704 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3705 disables the coutermeasure allowing Eudora to connect."
3707 38. Exim was not checking that a write() to a log file succeeded. This could
3708 lead to Bad Things if a log got too big, in particular if it hit a file
3709 size limit. Exim now panics and dies if it cannot write to a log file, just
3710 as it does if it cannot open a log file.
3712 39. Modified OS/Makefile-Linux so that it now contains
3714 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3716 The two -D definitions ensure that Exim is compiled with large file
3717 support, which makes it possible to handle log files that are bigger than
3720 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3721 instance) a domain was checked against a named list that involved a lookup,
3722 causing $domain_data to be set, then another domain was checked against the
3723 same list, then the first domain was re-checked, the value of $domain_data
3724 after the final check could be wrong. In particular, if the second check
3725 failed, it could be set empty. This bug probably also applied to
3728 41. The strip_trailing_dot option was not being applied to the address given
3729 with the -f command-line option.
3731 42. The code for reading a message's header from the spool was incrementing
3732 $received_count, but never initializing it. This meant that the value was
3733 incorrect (doubled) while delivering a message in the same process in which
3734 it was received. In the most common configuration of Exim, this never
3735 happens - a fresh exec is done - but it can happen when
3736 deliver_drop_privilege is set.
3738 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3739 it now includes up to 150 characters of the unexpected data in the log
3742 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3743 and building data strings. The size of both of these buffers was 10 000
3744 bytes - far larger than anybody would *ever* want, thought I. Needless to
3745 say, somebody hit the limit. I have increased the maximum line length to
3746 20 000 and the maximum data length of concatenated lines to 100 000. I have
3747 also fixed two bugs, because there was no checking on these buffers. Tsk,
3748 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3749 buffer is too small.
3751 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3752 lsearch lookups. Now it does.
3754 46. When parsing a route_list item in a manualroute router, a fixed-length
3755 buffer was used for the list of hosts. I made this 1024 bytes long,
3756 thinking that nobody would ever have a list of hosts that long. Wrong.
3757 Somebody had a whole pile of complicated expansion conditions, and the
3758 string was silently truncated, leading to an expansion error. It turns out
3759 that it is easier to change to an unlimited length (owing to other changes
3760 that have happened since this code was originally written) than to build
3761 structure for giving a limitation error. The length of the item that
3762 expands into the list of hosts is now unlimited.
3764 47. The lsearch lookup could not handle data where the length of text line was
3765 more than 4095 characters. Such lines were truncated, leading to shortened
3766 data being returned. It should now handle lines of any length.
3768 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3769 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3772 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3773 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3774 no longer happens in comment lines. A list of replacements is now placed
3775 at the head of all of the source files, except those whose only change is
3776 to replace PERL_COMMAND in the very first #! line.
3778 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3779 messages on the queue, with a bottom-up merge sort, using code contributed
3780 by Michael Haardt. This should make operations like -bp somewhat faster on
3781 large queues. It won't affect queue runners, except when queue_run_in_order
3784 51. Installed eximstats 1.31 in the distribution.
3786 52. Added support for SRV lookups to the dnslookup router.
3788 53. If an ACL referred to $message_body or $message_body_end, the value was not
3789 reset for any messages that followed in the same SMTP session.
3791 54. The store-handling optimization for building very long strings was not
3792 differentiating between the different store pools. I don't think this
3793 actually made any difference in practice, but I've tidied it.
3795 55. While running the routers to verify a sender address, $sender_address
3796 was still set to the sender address. This is wrong, because when routing to
3797 send a bounce to the sender, it would be empty. Therefore, I have changed
3798 it so that, while verifying a sender address, $sender_address is set to <>.
3799 (There is no change to what happens when verifying a recipient address.)
3801 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3802 target A or AAAA records (if not already returned) without resetting the
3803 qualify_single or search_parents options of the DNS resolver. These are
3804 inappropriate in this case because the targets of MX and SRV records must
3805 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3806 target that, when qualified, matched something in the local domain. These
3807 two options are now turned off when doing these lookups.
3809 57. It seems that at least some releases of Reiserfs (which does not have the
3810 concept of a fixed number of inodes) returns zero and not -1 for the
3811 number of available inodes. This interacted badly with check_spool_inodes,
3812 which assumed that -1 was the "no such thing" setting. What I have done is
3813 to check that the total number of inodes is greater than zero before doing
3814 the test of how many are available.
3816 58. When a "warn" ACL statement has a log_message modifier, the message is
3817 remembered, and not repeated. This is to avoid a lot of repetition when a
3818 message has many recipients that cause the same warning to be written.
3819 Howewer, Exim was preserving the list of already written lines for an
3820 entire SMTP session, which doesn't seem right. The memory is now reset if a
3821 new message is started.
3823 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3824 debugging output unless log_rewrite was also set.
3826 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3827 of (int)(handle) when we know that handle contains (void *)(-1).
3829 61. The Exim daemon panic-logs an error return when it closes the incoming
3830 connection. However "connection reset by peer" seems to be common, and
3831 isn't really an error worthy of noting specially, so that particular error
3834 62. When Exim is trying to find all the local interfaces, it used to panic and
3835 die if the ioctl to get the interface flags failed. However, it seems that
3836 on at least one OS (Solaris 9) it is possible to have an interface that is
3837 included in the list of interfaces, but for which you get a failure error
3838 for this call. This happens when the interface is not "plumbed" into a
3839 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3840 failure of the "get flags" call assumes that the interface is down.
3842 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3843 makes life easier for people who are doing arithmetic on fields extracted
3844 from dates, where you often get leading zeros that should not be
3845 interpreted as octal.
3847 64. Added qualify_domain to the redirect router, to override the global
3850 65. If a pathologically long header line contained very many addresses (the
3851 report of this problem mentioned 10 000) and each of them was rewritten,
3852 Exim could use up a very large amount of memory. (It kept on making new
3853 copies of the header line as it rewrote, and never released the old ones.)
3854 At the expense of a bit more processing, the header rewriting function has
3855 been changed so that it no longer eats memory in this way.
3857 66. The generation of the Received: header has been moved from the time that a
3858 message starts to be received, to the time that it finishes. The timestamp
3859 in the Received: header should now be very close to that of the <= log
3860 line. There are two side-effects of this change:
3862 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3863 logged header lines no longer include the local Received: line, because
3864 it has not yet been created. The same applies to a copy of the message
3865 that is returned to a non-SMTP sender when a message is rejected.
3867 (b) When a filter file is tested using -bf, no additional Received: header
3868 is added to the test message. After some thought, I decided that this
3871 This change does not affect the value of $received_for. It is still set
3872 after address rewriting, but before local_scan() is called.
3874 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3876 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3877 gave an unhelpful panic error message, and a defer error. I have managed to
3878 change this behaviour so that it now rejects any supplied certificate,
3879 which seems right, as the list of acceptable certificates is empty.
3881 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3882 gave an unhelpful defer error. I have not managed to make this reject any
3883 supplied certificates, but the error message it gives is "no certificate
3884 supplied", which is not helpful.
3886 70. exigrep's output now also includes lines that are not associated with any
3887 message, but which match the given pattern. Implemented by a patch from
3888 Martin Sluka, which also tidied up the Perl a bit.
3890 71. Recipient callout verification, like sender verification, was using <> in
3891 the MAIL FROM command. This isn't really the right thing, since the actual
3892 sender may affect whether the remote host accepts the recipient or not. I
3893 have changed it to use the actual sender in the callout; this means that
3894 the cache record is now keyed on a recipient/sender pair, not just the
3895 recipient address. There doesn't seem to be a real danger of callout loops,
3896 since a callout by the remote host to check the sender would use <>.
3897 [SEE ABOVE: changed after hitting problems.]
3899 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3900 temporary errors. However, in the case of such a code being given after
3901 the end of a data transmission (i.e. after ".") Exim was failing to write
3902 a retry record for the message. (Yes, there was some broken host that was
3903 actually sending 8xx at this point.)
3905 73. An unknown lookup type in a host list could cause Exim to panic-die when
3906 the list was checked. (An example that provoked this was putting <; in the
3907 middle of a list instead of at the start.) If this happened during a DATA
3908 ACL check, a -D file could be left lying around. This kind of configuration
3909 error no longer causes Exim to die; instead it causes a defer errror. The
3910 incident is still logged to the main and panic logs.
3912 74. Buglet left over from Exim 3 conversion. The message "too many messages
3913 in one connection" was written to the rejectlog but not the mainlog, except
3914 when address rewriting (yes!) was being logged.
3916 75. Added write_rejectlog option.
3918 76. When a system filter was run not as root (that is, when system_filter_user
3919 was set), the values of the $n variables were not being returned to the
3920 main process; thus, they were not subsequently available in the $sn
3923 77. Added +return_path_on_delivery log selector.
3925 78. A connection timeout was being treated differently from recipients deferred
3926 when testing hosts_max_try with a message that was older than the host's
3927 retry timeout. (The host should not be counted, thus allowing all hosts to
3928 be tried at least once before bouncing.) This may have been the cause of an
3929 occasionally reported bug whereby a message would remain on the queue
3930 longer than the retry timeout, but would be bounced if a delivery was
3931 forced. I say "may" because I never totally pinned down the problem;
3932 setting up timeout/retry tests is difficult. See also the next item.
3934 79. The ultimate address timeout was not being applied to errors that involved
3935 a combination of host plus message (for example, a timeout on a MAIL
3936 command). When an address resolved to a number of possible hosts, and they
3937 were not all tried for each delivery (e.g. because of hosts_max_try), a
3938 message could remain on the queue longer than the retry timeout.
3940 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3943 81. Fixed an obscure SMTP outgoing bug which required at least the following
3944 conditions: (a) there was another message waiting for the same server;
3945 (b) the server returned 5xx to all RCPT commands in the first message so
3946 that the message was not completed; (c) the server dropped the connection
3947 or gave a negative response to the RSET that Exim sends to abort the
3948 transaction. The observed case was a dropped connection after DATA that had
3949 been sent in pipelining mode. That is, the server had advertised PIPELINING
3950 but was not implementing it correctly. The effect of the bug was incorrect
3951 behaviour, such as trying another host, and this could lead to a crash.
3957 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3958 and daemon.c were passed as pointers to ints; they should have been
3959 pointers to socklen_t variables (which are typically unsigned ints).
3961 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3964 3. Fixed a really odd bug that affected only the testing scheme; patching a
3965 certain fixed string in the binary changed the value of another string that
3966 happened to be identical to the end of the original first string.
3968 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3969 name", it returns that address as the IP address. On some operating
3970 systems (e.g. Solaris), it also passes back the IP address string as the
3971 "host name". However, on others (e.g. Linux), it passes back an empty
3972 string. Exim wasn't checking for this, and was changing the host name to an
3973 empty string, assuming it had been canonicized.
3975 5. Although rare, it is permitted to have more than one PTR record for a given
3976 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3977 all the names associated with an address, because they do in Solaris.
3978 However, it seems that they do not in Linux for data that comes from the
3979 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3980 I found this out when I moved to a new Linux workstation and tried to run
3981 the Exim test suite.
3983 To get round this problem I have changed the code so that it now does its
3984 own call to the DNS to look up PTR records when searching for a host name.
3985 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3986 addresses that are only in /etc/hosts are still found.
3988 This behaviour is, however, controlled by an option called host_lookup_
3989 order, which defaults to "bydns:byaddr". If people want to use the other
3990 order, or indeed, just use one or the other means of lookup, they can
3991 specify it in this variable.
3993 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3994 some operating systems, this comes back from gethostbyaddr() as an empty
3995 string, and this is what Exim used to test for. However, it seems that in
3996 other systems, "." is yielded. Exim now tests for this case too.
3998 7. The values of check_spool_space and check_log_space are now held internally
3999 as a number of kilobytes instead of an absolute number of bytes. If a
4000 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4001 kilobyte. This means that much larger values can be stored.
4003 8. Exim monitor: an attempt to get the action menu when not actually pointing
4004 at a message produces an empty menu entitled "No message selected". This
4005 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4006 no entries in it ("Shell widget menu has zero width and/or height"). So I
4007 have added a single, blank menu entry in this case.
4009 9. Added ${quote_local_part.
4011 10. MIME decoding is now applied to the contents of Subject: header lines when
4014 11. Now that a reference to $sender_host_address automatically causes a reverse
4015 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4016 host lookup before query-style lookups in lists that might use this
4017 variable. This has therefore been abolished, and the "net-" prefix is no
4018 longer necessary for query-style lookups.
4020 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4021 have been a typo for LFLAGS, so it has been changed.
4023 13. The install script calls Exim with "-C /dev/null" in order to find the
4024 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4025 to be output. Howeve, since Exim outputs its version number before the
4026 error, it didn't break the script. It just looked ugly. I fixed this by
4027 always allowing "-C /dev/null" if the caller is root.
4029 14. Ignore overlarge ACL variable number when reading spool file - insurance
4030 against a later release with more variables having written the file.
4032 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4033 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4034 this, as well as the form without the "IPv6" on the front.
4036 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4037 OS/Makefile-Darwin file.
4039 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4040 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4042 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4043 variable. However, some OS use ints for inodes. I've added cast to long int
4044 to get rid of the compiler warning.
4046 19. I had forgotten to lock out "/../" in configuration file names when
4047 ALT_CONFIG_PREFIX was set.
4049 20. Routers used for verification do not need to specify transports. However,
4050 if such a router generated a host list, and callout was configured, Exim
4051 crashed, because it could not find a port number from the (non-existent)
4052 transport. It now assumes port 25 in this circumstance.
4054 21. Added the -t option to exigrep.
4056 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4057 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4058 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4059 them is set, LOOKUP_LSEARCH is forced.
4061 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4063 24. Added sender and host information to the "rejected by local_scan()" log
4064 line; previously there was no indication of these.
4066 25. Added .include_if_exists.
4068 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4069 Linux. It turns out that not all file systems support this. Apparently some
4070 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4071 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4072 not supported on the file descriptor, is now ignored when Exim is trying to
4073 sync a directory. This applies only to Linux.
4075 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4077 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4078 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4081 29. Added support for maildirsize files from supplied patch (modified a bit).
4083 30. The use of :fail: followed by an empty string could lead Exim to respond to
4084 sender verification failures with (e.g.):
4086 550 Verification failed for <xxx>
4087 550 Sender verify failed
4089 where the first response line was missing the '-' that indicates it is not
4090 the final line of the response.
4092 31. The loop for finding the name of the user that called Exim had a hardwired
4093 limit of 10; it now uses the value of finduser_retries, which is used for
4094 all other user lookups.
4096 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4099 33. Exim was neglecting to zero errno before one call of strtol() when
4100 expanding a string and expecting an integer value. On some systems this
4101 resulted in spurious "integer overflow" errors. Also, it was casting the
4102 result into an int without checking.
4104 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4105 did not work. The code looks as if it has *never* worked, though it appears
4106 to have been documented since at least releast 1.62. I have made it work.
4108 35. The "timeout_DNS" error in retry rules, also documented since at least
4109 1.62, also never worked. As it isn't clear exactly what this means, and
4110 clearly it isn't a major issue, I have abolished the feature by treating it
4111 as "timeout", and writing a warning to the main and panic logs.
4113 36. The display of retry rules for -brt wasn't always showing the error code
4116 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4117 timeout_connect_A, timeout_connect_MX.
4119 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4120 to the empty sender.
4122 39. The daemon was not analysing the content of -oX till after it had closed
4123 stderr and disconnected from the controlling terminal. This meant that any
4124 syntax errors were only noted on the panic log, and the return code from
4125 the command was 0. By re-arranging the code a little, I've made the
4126 decoding happen first, so such errors now appear on stderr, and the return
4127 code is 1. However, the actual setting up of the sockets still happens in
4128 the disconnected process, so errors there are still only recorded on the
4131 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4132 connections (as happens on some IP stacks) was logged at start up time as
4133 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4134 it from "IPv6 and IPv4", which means that two separate sockets are being
4137 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4138 says whether AF_INET or AF_INET6 was passed as an argument.
4140 42. Exiwhat output was messed up when time zones were included in log
4143 43. Exiwhat now gives more information about the daemon's listening ports,
4144 and whether -tls-on-connect was used.
4146 44. The "port" option of the smtp transport is now expanded.
4148 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4149 silently ignored. Now an error message is written to the main and panic
4152 46. There's a new ACL modifier called "logwrite" which writes to a log file
4153 as soon as it is encountered.
4155 47. Added $local_user_uid and $local_user_gid at routing time.
4157 48. Exim crashed when trying to verify a sender address that was being
4160 49. Exim was recognizing only a space character after ".include". It now also
4161 recognizes a tab character.
4163 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4164 extracting the relevant information from the specification. The man page no
4165 longer contains scrambled data for the -d option, and I've added a section
4166 at the front about calling Exim under different names.
4168 51. Added "extra_headers" argument to the "mail" command in filter files.
4170 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4173 53. Installed eximstats 1.29.
4175 54. Added transport_filter_timeout as a generic transport option.
4177 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4178 Cc: header lines. This was required by RFC 822, but it not required by RFC
4181 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4182 incoming messages that did not have them. Now it does so only if the
4183 message originates locally, that is, if there is no associated remote host
4184 address. When Resent- header lines are present, this applies to the Resent-
4185 lines rather than the non-Resent- lines.
4187 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4188 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4190 58. Messages for configuration errors now include the name of the main
4191 configuration file - useful now that there may be more than one file in a
4192 list (.included file names were always shown).
4194 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4195 for those rare installations that do not start the daemon as root or run it
4196 setuid root. I've cut out the call to initgroups() if the daemon is not
4199 60. The Exim user and group can now be bound into the binary as text strings
4200 that are looked up at the start of Exim's processing.
4202 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4204 62. Added $mailstore_basename variable.
4206 63. Installed patch to sieve.c from Michael Haardt.
4208 64. When Exim failed to open the panic log after failing to open the main log,
4209 the original message it was trying to log was written to stderr and debug
4210 output, but if they were not available (the usual case in production), it
4211 was lost. Now it is written to syslog before the two lines that record the
4212 failures to open the logs.
4214 65. Users' Exim filters run in subprocesses under the user's uid. It is
4215 possible for a "deliver" command or an alias in a "personal" command to
4216 provoke an address rewrite. If logging of address rewriting is configured,
4217 this fails because the process is not running as root or exim. There may be
4218 a better way of dealing with this, but for the moment (because 4.30 needs
4219 to be released), I have disabled address rewrite logging when running a
4220 filter in a non-root, non-exim process.
4226 1. The buildconfig auxiliary program wasn't quoting the value set for
4227 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4228 not defined. This bug was masked in 4.22 by the effect that was fixed in
4231 2. Some messages that were rejected after a message id was allocated were
4232 shown as "incomplete" by exigrep. It no longer does this for messages that
4233 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4235 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4236 have allow_domain_literals set, the ID did not get logged in the <= line.
4237 Domain literals are now always recognized in Message-ID: header lines.
4239 4. The first argument for a ${extract expansion item is the key name or field
4240 number. Leading and trailing spaces in this item were not being ignored,
4241 causing some misleading effects.
4243 5. When deliver_drop_privilege was set, single queue runner processes started
4244 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4245 same command in the process it spins off) were not dropping privilege.
4247 6. When the daemon running as "exim" started a queue runner, it always
4248 re-executed Exim in the spun-off process. This is a waste of effort when
4249 deliver_drop_privilege is set. The new process now just calls the
4250 queue-runner function directly.
4256 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4259 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4260 ignored. Though the use of -oP was forcing the writing of a pid file, it
4261 was always written to the default place.
4263 3. If the message "no IP address found for host xxxx" is generated during
4264 incoming verification, it is now followed by identification of the incoming
4265 connection (so you can more easily find what provoked it).
4267 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4269 5. Added some features to "harden" Exim a bit more against certain attacks:
4271 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4272 be put in Local/Makefile. This is like the never_users runtime option,
4273 but it cannot be overridden. The default setting is "root".
4275 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4276 prefix string with which any file named in a -C command line option
4279 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4280 is retained for -C and -D only if the caller of Exim is root. Without
4281 it, the exim user may also use -C and -D and retain privilege.
4283 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4284 command line option is disabled.
4286 6. Macro names set by the -D option must start with an upper case letter, just
4287 like macro names defined in the configuration file.
4289 7. Added "dereference=" facility to LDAP.
4291 8. Two instances of the typo "uknown" in the source files are fixed.
4293 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4294 the Configure-Makefile script screwed up while processing it.
4296 10. Incorporated PCRE 4.4.
4298 11. The SMTP synchronization check was not operating right at the start of an
4299 SMTP session. For example, it could not catch a HELO sent before the client
4300 waited for the greeting. There is now a check for outstanding input at the
4301 point when the greeting is written. Because of the duplex, asynchronous
4302 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4303 way, but not yet received, when the check is performed.
4305 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4306 on TCP/IP sockets, because this apparently causes some broken clients to
4309 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4310 unchanged) from the Cygwin maintainer.
4312 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4313 was supported instead of testing for mbx. Effectively a typo.
4315 15. The spa authenticator server code was not checking that the input it
4316 received was valid base64.
4318 16. The debug output line for the "set" modifier in ACLs was not showing the
4319 name of the variable that was being set.
4321 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4323 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4324 lookup on its own. Something else was needed to trigger the lookup. For
4325 example, a match in host_lookup or the need for a host name in a host list.
4326 Now, if $sender_host_name is referenced and the host name has not yet been
4327 looked up, a lookup is performed. If the lookup fails, the variable remains
4328 empty, and $host_lookup_failed is set to "1".
4330 19. Added "eqi" as a case-independent comparison operator.
4332 20. The saslauthd authentication condition could segfault if neither service
4333 nor realm was specified.
4335 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4336 error message that was logged was misleading, and incoming SMTP
4337 connections were dropped. The message is now more accurate, and temporary
4338 errors are given to SMTP connections.
4340 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4341 (except RSET) with a 421 error, until QUIT is received. However, it was
4342 failing to send a response to QUIT.
4344 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4345 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4346 ACL is now run after the helo_try_verify_hosts code.
4348 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4349 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4350 case-independent, so other case variants are also recognized). Apparently
4351 some systems use these upper case variants.
4353 25. If more than two messages were waiting for the same host, and a transport
4354 filter was specified for the transport, Exim sent two messages over the
4355 same TCP/IP connection, and then failed with "socket operation on non-
4356 socket" when it tried to send the third.
4358 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4360 27. The extern definition of crypt16() in expand.c was not being excluded when
4361 the OS had its own crypt16() function.
4363 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4364 as a preferred synonym for return_size_limit, both as an option and as an
4367 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4369 30. Changed the default configuration ACL to relax the local part checking rule
4370 for addresses that are not in any local domains. For these addresses,
4371 slashes and pipe symbols are allowed within local parts, but the sequence
4372 /../ is explicitly forbidden.
4374 31. SPA server authentication was not clearing the challenge buffer before
4377 32. log_message in a "warn" ACL statement was writing to the reject log as
4378 well as to the main log, which contradicts the documentation and doesn't
4379 seem right (because no rejection is happening). So I have stopped it.
4381 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4382 However, I am unable to do any testing of this.
4384 34. Fixed an infelicity in the appendfile transport. When checking directories
4385 for a mailbox, to see if any needed to be created, it was accidentally
4386 using path names with one or more superfluous leading slashes; tracing
4387 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4389 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4390 contents are added to the log line that is written for every discarded
4391 recipient. (Previously a log_message setting was ignored.)
4393 36. The ${quote: operator now quotes the string if it is empty.
4395 37. The install script runs exim in order to find its version number. If for
4396 some reason other than non-existence or emptiness, which it checks, it
4397 could not run './exim', it was installing it with an empty version number,
4398 i.e. as "exim-". This error state is now caught, and the installation is
4401 38. An argument was missing from the function that creates an error message
4402 when Exim fails to connect to the socket for saslauthd authentication.
4403 This could cause Exim to crash, or give a corrupted message.
4405 39. Added isip, isip4, and isip6 to ${if conditions.
4407 40. The ACL variables $acl_xx are now saved with the message, and can be
4408 accessed later in routers, transports, and filters.
4410 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4411 strings in the file are not string-expanded.
4413 42. If a MAIL command specified a SIZE value that was too large to fit into an
4414 int variable, the check against message_size_limit failed. Such values are
4415 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4416 day this will have to be increased, but I don't think I want to be around
4417 when emails are that large.
4424 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4425 iconv() is not standard in FreeBSD.
4427 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4428 IPv6 enabled. The observed symptom was a segmentation fault on return from
4429 the function os_common_find_running_interfaces() in src/os.c.
4431 3. In the check_special_case() function in daemon.c I had used "errno" as an
4432 argument name, which causes warnings on some systems. This was basically a
4433 typo, since it was named "eno" in the comments!
4435 4. The code that waits for the clock to tick (at a resolution of some fraction
4436 of a second) so as to ensure message-id uniqueness was always waiting for
4437 at least one whole tick, when it could have waited for less. [This is
4438 almost certainly not relevant at current processor speeds, where it is
4439 unlikely to ever wait at all. But we try to future-proof.]
4441 5. The function that sleeps for a time interval that includes fractions of a
4442 second contained a race. It did not block SIGALRM between setting the
4443 timer, and suspending (a couple of lines later). If the interval was short
4444 and the sigsuspend() was delayed until after it had expired, the suspension
4445 never ended. On busy systems this could lead to processes getting stuck for
4448 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4449 process, before it forks any delivery processes. The open lookup caching
4450 mechanism meant that the open file or database connection was passed into
4451 the delivery process. The problem was that delivery processes always tidy
4452 up cached lookup data. This could cause a problem for the next delivery
4453 process started by the queue runner, because the external queue runner
4454 process does not know about the closure. So the next delivery process
4455 still has data in the lookup cache. In the case of a file lookup, there was
4456 no problem because closing a file descriptor in a subprocess doesn't affect
4457 the parent. However, if the lookup was caching a connection to a database,
4458 the connection was closed, and the second delivery process was likely to
4459 see errors such as "PGSQL: query failed: server closed the connection
4460 unexpectedly". The problem has been fixed by closing all cached lookups
4461 in a queue runner before running a delivery process.
4463 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4464 seem to have the "const" qualifier which it has on other OS. I've
4467 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4468 *of the same type* (client or server) with the same public name that an
4469 error should be diagnosed.
4471 9. When Exim looked up a host name for an IP address, but failed to find the
4472 original IP address when looking up the host name (a safety check), it
4473 output the message "<ip address> does not match any IP for NULL", which was
4474 confusing, to say the least. The bug was that the host name should have
4475 appeared instead of "NULL".
4477 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4478 user that is built into the binary, and the -C or -D options is used, root
4479 privilege is dropped before the configuration file is read. In addition,
4480 logging is switched to stderr instead of the normal log files. If the
4481 configuration then re-defines the Exim user, the unprivileged environment
4482 is probably not what is expected, so Exim logs a panic warning message (but
4485 However, if deliver_drop_privilege is set, the unprivileged state may well
4486 be exactly what is intended, so the warning has been cut out in that case,
4487 and Exim is allowed to try to write to its normal log files.
4493 1. smtp_return_error_details was not giving details for temporary sender
4494 or receiver verification errors.
4496 2. Diagnose a configuration error if two authenticators have the same public
4499 3. Exim used not to create the message log file for a message until the first
4500 delivery attempt. This could be confusing when incoming messages were held
4501 for policy or load reasons. The message log file is now created at the time
4502 the message is received, and an initial "Received" line is written to it.
4504 4. The automatically generated man page for command line options had a minor
4505 bug that caused no ill effects; however, a more serious problem was that
4506 the procedure for building the man page automatically didn't always
4507 operate. Consequently, release 4.20 contains an out-of-date version. This
4508 shouldn't happen again.
4510 5. When building Exim with embedded Perl support, the script that builds the
4511 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4512 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4514 6. The freeze_tell option was not being used for messages that were frozen on
4515 arrival, either by an ACL or by local_scan().
4517 7. Added the smtp_incomplete_transaction log selector.
4519 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4520 was accepting AUTH without a new EHLO.
4522 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4523 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4526 10. Logging of TCP/IP connections (when configured) now happens in the main
4527 daemon process instead of the child process, so that the TCP/IP connection
4528 count is more accurate (but it can never be perfect).
4530 11. The use of "drop" in a nested ACL was not being handled correctly in the
4531 outer ACL. Now, if condition failure induced by the nested "drop" causes
4532 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4533 or "require"), the connection is dropped.
4535 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4536 that yield "discard" can now be used with an "accept" or a "discard" verb,
4537 but an error is generated for any others (because I can't see a useful way
4538 to define what should happen).
4540 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4541 are now processed in the same way as lines in the Exim configuration file.
4542 In particular, continuation lines are supported.
4544 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4546 15. Added -ti meaning -t -i.
4548 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4549 domains, and warn by logging if others are found.
4551 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4552 returned from GIFCONF when Exim is trying to find the list of interfaces on
4553 a host. The code in os.c has been modified to copy each ifreq to an aligned
4554 structure in all cases.
4556 Also, in some cases, the returned ifreq's were being copied to a 'struct
4557 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4558 means the last couple of bytes of an IPv6 address could be chopped if the
4559 ifreq contained only a normal sockaddr (14 bytes storage).
4561 18. Named domain lists were not supported in the hosts_treat_as_local option.
4562 An entry such as +xxxx was not recognized, and was treated as a literal
4565 19. Ensure that header lines added by a DATA ACL are included in the reject log
4566 if the ACL subsequently rejects the message.
4568 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4569 MD5 (which is deprecated).
4571 21. When testing a filter file using -bf, Exim was writing a message when it
4572 took the sender from a "From " line in the message, but it was not doing so
4573 when it took $return_path from a Return-Path: header line. It now does.
4575 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4576 with a valid header line field name (a series of printing characters
4577 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4579 23. Changed "disc" in the source to "disk" to conform to the documentation and
4580 the book and for uniformity.
4582 24. Ignore Sendmail's -Ooption=value command line item.
4584 25. When execve() failed while trying to run a command in a pipe transport,
4585 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4586 could be confused with a return value of 69 from the command itself. This
4587 has been changed to 127, the value the shell returns if it is asked to run
4588 a non-existent command. The wording for the related log line suggests a
4589 non-existent command as the problem.
4591 26. If received_header_text expands to an empty string, do not add a Received:
4592 header line to the message. (Well, it adds a token one on the spool, but
4593 marks it "old" so that it doesn't get used or transmitted.)
4595 27. Installed eximstats 1.28 (addition of -nt option).
4597 28. There was no check for failure on the call to getsockname() in the daemon
4598 code. This can fail if there is a shortage of resources on the system, with
4599 ENOMEM, for example. A temporary error is now given on failure.
4601 29. Contrary to the C standard, it seems that in some environments, the
4602 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4603 program. Exim now does this explicitly; it affects the formatting of
4604 timestamps using strftime().
4606 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4607 complaints. I've now initialized all the variables, to avoid this.
4609 32. Header lines added by a system filter were not being "seen" during
4610 transport-time rewrites.
4612 33. The info_callback() function passed to OpenSSL is set up with type void
4613 (*)(SSL *, int, int), as described somewhere. However, when calling the
4614 function (actually a macro) that sets it up, the type void(*)() is
4615 expected. I've put in a cast to prevent warnings from picky compilers.
4617 34. If a DNS black list lookup found a CNAME record, but there were no A
4618 records associated with the domain it pointed at, Exim crashed.
4620 35. If a DNS black list lookup returned more than one A record, Exim ignored
4621 all but the first. It now scans all returned addresses if a particular IP
4622 value is being sought. In this situation, the contents of the
4623 $dnslist_value variable are a list of all the addresses, separated by a
4626 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4627 to accept a host name and all its aliases if the forward lookup for any of
4628 them yielded the IP address of the incoming connection. Now it accepts only
4629 those names whose forward lookup yields the correct IP address. Any other
4630 names are discarded. This closes a loophole whereby a rogue DNS
4631 administrator could create reverse DNS records to break through a
4632 wildcarded host restriction in an ACL.
4634 37. If a user filter or a system filter that ran in a subprocess used any of
4635 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4636 the wrong values were passed to the pipe command ($thisaddress had the
4637 value of $0, $0 had the value of $1, etc). This bug was introduced by
4638 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4640 38. Improved the line breaking for long SMTP error messages from ACLs.
4641 Previously, if there was no break point between 40 and 75 characters, Exim
4642 left the rest of the message alone. Two changes have been made: (a) I've
4643 reduced the minimum length to 35 characters; (b) if it can't find a break
4644 point between 35 and 75 characters, it looks ahead and uses the first one
4645 that it finds. This may give the occasional overlong line, but at least the
4646 remaining text gets split now.
4648 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4649 file descriptors might be low, and that setting 1000 would always raise it.
4650 It turns out that in some environments, the limit is already over 1000 and
4651 that lowering it causes trouble. So now Exim takes care not to decrease it.
4653 40. When delivering a message, the value of $return_path is set to $sender_
4654 address at the start of routing (routers may change the value). By an
4655 oversight, this default was not being set up when an address was tested by
4656 -bt or -bv, which affected the outcome if any router or filter referred to
4659 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4660 log only when "message" or "log_message" are set. However, if one of the
4661 conditions was an address verification, or a call to a nested ACL, the
4662 messages generated by the underlying test were being passed through. This
4663 no longer happens. The underlying message is available in $acl_verify_
4664 message for both "message" and "log_message" expansions, so it can be
4665 passed through if needed.
4667 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4668 new expansion $bh_ to give the encoded byte string without charset
4669 translation. Translation happens only if iconv() is available; HAVE_ICONV
4670 indicates this at build time. HEADERS_CHARSET gives the charset to
4671 translate to; headers_charset can change it in the configuration, and
4672 "headers charset" can change it in an individual filter file.
4674 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4675 that creates RFC 2047 encoded "words" labels them as that charset instead
4676 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4677 expansion operator; (ii) when Exim creates a From: line for a local
4678 message; (iii) when a header line is rewritten to include a "phrase" part.
4680 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4681 buggy, causing it to skip the first lines of messages whose message ID
4682 ended in 'D'. This would not have bitten before Exim release 4.14, because
4683 message IDs were unlikely to end in 'D' before then. The effect was to have
4684 incorrect size information for certain domains.
4686 45. #include "config.h" was missing at the start of the crypt16.c module. This
4687 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4690 46. If there was a timeout during a "random" callout check, Exim treated it as
4691 a failure of the random address, and carried on sending RSET and the real
4692 address. If the delay was just some slowness somewhere, the response to the
4693 original RCPT would be taken as a response to RSET and so on, causing
4694 mayhem of various kinds.
4696 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4697 when I implemented it. It didn't allow for the fact that some option values
4698 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4699 the right test for positive values.
4701 48. Domain names in DNS records are case-independent. Exim always looks them up
4702 in lower case. Some resolvers return domain names in exactly the case they
4703 appear in the zone file, that is, they may contain uppercase letters. Not
4704 all resolvers do this - some return always lower case. Exim was treating a
4705 change of case by a resolver as a change of domain, similar to a widening
4706 of a domain abbreviation. This triggered its re-routing code and so it was
4707 trying to route what was effectively the same domain again. This normally
4708 caused routing to fail (because the router wouldn't handle the domain
4709 twice). Now Exim checks for this case specially, and just changes the
4710 casing of the domain that it ultimately uses when it transmits the message
4713 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4716 50. If a filter generated a file delivery with a non-absolute name (possible if
4717 no home directory exists for the router), the forbid_file option was not
4720 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4721 the existing equality matching.
4723 52. Exim was using ints instead of ino_t variables in some places where it was
4724 dealing with inode numbers.
4726 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4727 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4728 called TMPDIR, and if it finds it is different, it changes its value.
4730 54. The smtp_printf() function is now made available to local_scan() so
4731 additional output lines can be written before returning. There is also an
4732 smtp_fflush() function to enable the detection of a dropped connection.
4733 The variables smtp_input and smtp_batched_input are exported to
4736 55. Changed the default runtime configuration: the message "Unknown user"
4737 has been removed from the ACL, and instead placed on the localuser router,
4738 using the cannot_route_message feature. This means that any verification
4739 failures that generate their own messages won't get overridden. Similarly,
4740 the "Unrouteable address" message that was in the ACL for unverifiable
4741 relay addresses has also been removed.
4743 56. Added hosts_avoid_esmtp to the smtp transport.
4745 57. The exicyclog script was not checking for the esoteric option
4746 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4747 will work only if exicyclog is run under the appropriate euid.
4749 58. Following a discussion on the list, the rules by which Exim recognises line
4750 endings on incoming messages have been changed. The -dropcr and drop_cr
4751 options are now no-ops, retained only for backwards compatibility. The
4752 following line terminators are recognized: LF CRLF CR. However, special
4753 processing applies to CR:
4755 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4756 nor a local message in the state where . is a terminator.
4758 (ii) If a bare CR is encountered in a header line, an extra space is added
4759 after the line terminator so as not to end the header. The reasoning
4760 behind this is that bare CRs in header lines are most likely either
4761 to be mistakes, or people trying to play silly games.
4763 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4764 was being incorrectly given as 18 bytes larger than it should have been.
4765 This is a VOB (very old bug).
4767 60. This may never have affected anything current, but just in case it has:
4768 When the local host is found other than at the start of a list of hosts,
4769 the local host, those with the same MX, and any that follow, are discarded.
4770 When the list in question was part of a longer list of hosts, the following
4771 hosts (not currently being processed) were also being discarded. This no
4772 longer happens. I'm not sure if this situation could ever has previously
4775 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4778 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4779 header. This is something that is recommended in a new Internet Draft, and
4780 is something that is documented as being done by Sendmail. There are two
4781 possible values. For messages generated by the autoreply transport, Exim
4784 Auto-Submitted: auto-replied
4786 whereas for all other generated messages (e.g. bounces) it adds
4788 Auto-Submitted: auto-generated
4790 63. The "personal" condition in filters now includes a test for the
4791 Auto-Submitted: header. If it contains the string "auto-" the message it
4792 not considered personal.
4794 64. Added rcpt_include_affixes as a generic transport option.
4796 65. Added queue_only_override (default true).
4798 66. Added the syslog_duplication option.
4800 67. If what should have been the first header line of a message consisted of
4801 a space followed by a colon, Exim was mis-interpreting it as a header line.
4802 It isn't of course - it is syntactically invalid and should therefore be
4803 treated as the start of the message body. The misbehaviour could have
4804 caused a number of strange effects, including loss of data in subsequent
4805 header lines, and spool format errors.
4807 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4808 client host had authenticated. This control can now be exercised by an ACL
4809 for more flexibility.
4811 69. By default, callouts do not happen when testing with -bh. There is now a
4812 variant, -bhc, which does actually run the callout code, including
4813 consulting and updating the callout cache.
4815 70. Added support for saslauthd authentication, courtesy of Alexander
4818 71. If statvfs() failed on the spool or log directories while checking their
4819 size for availability, Exim confusingly gave the error "space shortage".
4820 Furthermore, in debugging mode it crashed with a floating point exception.
4821 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4822 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4823 serious problem, Exim now writes to the main and panic logs when this
4824 happens, with details of the failure. It then refuses to accept the
4825 incoming message, giving the message "spool directory problem" or "log
4826 directory problem" with a 421 code for SMTP messages.
4828 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4829 0, 1, and 2 exist, because some OS complain for execs without them (see
4830 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4831 descriptors. However, the code omitted to check that the open succeeded,
4832 causing mysterious errors if for some reason the permissions on /dev/null
4833 got screwed. Now Exim writes a message to the main and panic logs, and
4834 bombs out if it can't open /dev/null.
4836 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4837 interact so that it is all more flexible. It is supposed to remain
4838 backwards compatible. Also added extra_local_interfaces.
4840 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4841 to bomb out with an assertion failure - to the client this appears as a
4842 connection drop. This problem occurs in the part of the code that was taken
4843 from the Samba project. Fortunately, the assertion is in a very simple
4844 function, so I have fixed this by reproducing the function inline in the
4845 one place where it is called, and arranging for authentication to fail
4846 instead of killing the process with assert().
4848 75. The SPA client code was not working when the server requested OEM rather
4849 than Unicode encoding.
4851 76. Added code to make require_files with a specific uid setting more usable in
4852 the case where statting the file as root fails - usually a non-root-mounted
4853 NFS file system. When this happens and the failure is EACCES, Exim now
4854 forks a subprocess and does the per-uid checking as the relevant uid.
4856 77. Added process_log_path.
4858 78. If log_file_path was not explicitly set, a setting of check_log_space or
4859 check_log_inodes was ignored.
4861 79. If a space check for the spool or log partitions fails, the incident is now
4862 logged. Of course, in the latter case the data may get lost...
4864 80. Added the %p formatting code to string_format() so that it can be used to
4865 print addresses in debug_print(). Adjusted all the address printing in the
4866 debugging in store.c to use %p rather than %d.
4868 81. There was a concern that a line of code in smtp_in.c could overflow a
4869 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4870 initially expressed, the concern was not well-founded, because trailing
4871 spaces are removed early. However, if the trailing spaces were followed by
4872 a NULL, they did not get removed, so the overflow was possible. Two fixes
4875 (a) I re-wrote the offending code in a cleaner fashion.
4876 (b) If an incoming SMTP command contains a NULL character, it is rejected
4879 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4880 runs initgroups(), so that if the Exim user is in any additional groups,
4881 they will be used during message reception.
4887 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob