1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.538 2008/01/18 12:23:26 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
22 TK/01 Add preliminary DKIM support. Currently requires a forked version of
23 ALT-N's libdkim that I have put here:
24 http://duncanthrax.net/exim-experimental/
26 Note to Michael Haardt: I had to rename some vars in sieve.c. They
27 were called 'true' and it seems that C99 defines that as a reserved
28 keyword to be used with 'bool' variable types. That means you could
29 not include C99-style headers which use bools without triggering
30 build errors in sieve.c.
32 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
33 as mailq or other aliases. Changed the --help handling significantly
34 to do whats expected. exim_usage() emits usage/help information.
36 SC/01 Added the -bylocaldomain option to eximstats.
38 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
40 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
42 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
48 PH/01 Another patch from the Sieve maintainer.
50 PH/02 When an IPv6 address is converted to a string for single-key lookup
51 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
52 dots are used instead of colons so that keys in lsearch files need not
53 contain colons. This was done some time before quoting was made available
54 in lsearch files. However, iplsearch files do require colons in IPv6 keys
55 (notated using the quote facility) so as to distinguish them from IPv4
56 keys. This meant that lookups for IP addresses in host lists did not work
57 for iplsearch lookups.
59 This has been fixed by arranging for IPv6 addresses to be expressed with
60 colons if the lookup type is iplsearch. This is not incompatible, because
61 previously such lookups could never work.
63 The situation is now rather anomolous, since one *can* have colons in
64 ordinary lsearch keys. However, making the change in all cases is
65 incompatible and would probably break a number of configurations.
67 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
70 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
71 conversion specification without a maximum field width, thereby enabling
72 a rogue spamd server to cause a buffer overflow. While nobody in their
73 right mind would setup Exim to query an untrusted spamd server, an
74 attacker that gains access to a server running spamd could potentially
75 exploit this vulnerability to run arbitrary code as the Exim user.
77 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
78 $primary_hostname instead of what libspf2 thinks the hosts name is.
80 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
81 a directory entry by the name of the lookup key. Previously, if a
82 symlink pointed to a non-existing file or a file in a directory that
83 Exim lacked permissions to read, a lookup for a key matching that
84 symlink would fail. Now it is enough that a matching directory entry
85 exists, symlink or not. (Bugzilla 503.)
87 PH/03 The body_linecount and body_zerocount variables are now exported in the
90 PH/04 Added the $dnslist_matched variable.
92 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
93 This means they are set thereafter only if the connection becomes
96 PH/06 Added the client_condition to authenticators so that some can be skipped
97 by clients under certain conditions.
99 PH/07 The error message for a badly-placed control=no_multiline_responses left
100 "_responses" off the end of the name.
102 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
104 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
105 (without spaces) instead of just copying the configuration text.
107 PH/10 Added the /noupdate option to the ratelimit ACL condition.
109 PH/11 Added $max_received_linelength.
111 PH/12 Added +ignore_defer and +include_defer to host lists.
113 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
114 way in which PCRE > 7.0 is built.
116 PH/14 Implemented queue_only_load_latch.
118 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
119 MAIL command. The effect was to mangle the value on 64-bit systems.
121 PH/16 Another patch from the Sieve maintainer.
123 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
125 PH/18 If a system quota error occurred while trying to create the file for
126 a maildir delivery, the message "Mailbox is full" was not appended to the
127 bounce if the delivery eventually timed out. Change 4.67/27 below applied
128 only to a quota excession during the actual writing of the file.
130 PH/19 It seems that peer DN values may contain newlines (and other non-printing
131 characters?) which causes problems in log lines. The DN values are now
132 passed through string_printing() before being added to log lines.
134 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
135 and InterBase are left for another time.)
137 PH/21 Added message_body_newlines option.
139 PH/22 Guard against possible overflow in moan_check_errorcopy().
141 PH/23 POSIX allows open() to be a macro; guard against that.
143 PH/24 If the recipient of an error message contained an @ in the local part
144 (suitably quoted, of course), incorrect values were put in $domain and
145 $local_part during the evaluation of errors_copy.
151 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
152 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
155 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
156 issue a MAIL command.
158 PH/02 In an ACL statement such as
160 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
162 if a client was not listed at all, or was listed with a value other than
163 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
164 the condition was not true (as it should be), so access was not denied.
165 The bug was that the ! inversion was incorrectly passed on to the second
166 item. This has been fixed.
168 PH/03 Added additional dnslists conditions == and =& which are different from
169 = and & when the dns lookup returns more than one IP address.
171 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
172 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
174 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
175 FSYNC, which compiles an option called disable_fsync that allows for
176 bypassing fsync(). The documentation is heavily laced with warnings.
178 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
180 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
181 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
182 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
183 including adding "make clean"; (3) Added -fPIC when compiling the test
184 dynamically loaded module, to get rid of a warning.
186 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
187 message fails, move_frozen_messages = true and ignore_bounce_errors_after
188 = 0s. The bug is otherwise harmless.
190 PH/07 There was a bug in the dovecot authenticator such that the value of
191 $auth1 could be overwritten, and so not correctly preserved, after a
192 successful authentication. This usually meant that the value preserved by
193 the server_setid option was incorrect.
195 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
197 PH/09 Installed PCRE release 7.0.
199 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
200 run for batched SMTP input. It is now run at the start of every message
201 in the batch. While fixing this I discovered that the process information
202 (output by running exiwhat) was not always getting set for -bs and -bS
203 input. This is fixed, and it now also says "batched" for BSMTP.
205 PH/11 Added control=no_pipelining.
207 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
208 patch, slightly modified), and move the expansion of helo_data till after
209 the connection is made in the smtp transport (so it can use these
212 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
214 PH/14 Added log_selector = +pid.
216 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
218 PH/16 Add ${if forany and ${if forall.
220 PH/17 Added dsn_from option to vary the From: line in DSNs.
222 PH/18 Flush SMTP output before performing a callout, unless control =
223 no_callout_flush is set.
225 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
226 was true (the default) a successful delivery failed to delete the retry
227 item, thus causing premature timeout of the address. The bug is now
230 PH/20 Added hosts_avoid_pipelining to the smtp transport.
232 PH/21 Long custom messages for fakedefer and fakereject are now split up
233 into multiline reponses in the same way that messages for "deny" and
234 other ACL rejections are.
236 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
237 with slight modification.
239 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
240 draft, changing the syntax and factoring some duplicate code".
242 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
243 for deliveries of the second and subsequent messages over the same SMTP
246 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
247 ${reduce, with only minor "tidies".
249 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
251 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
252 expansion side effects.
254 PH/27 When a message times out after an over-quota error from an Exim-imposed
255 quota, the bounce message says "mailbox is full". This message was not
256 being given when it was a system quota that was exceeded. It now should
259 MH/03 Made $recipients available in local_scan(). local_scan() already has
260 better access to the recipient list through recipients_list[], but
261 $recipients can be useful in postmaster-provided expansion strings.
263 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
264 in the case of a MAIL command with additional options following the
265 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
266 were accidentally chopped off.
268 PH/29 SMTP synchronization checks are implemented when a command is read -
269 there is a check that no more input is waiting when there shouldn't be
270 any. However, for some commands, a delay in an ACL can mean that it is
271 some time before the response is written. In this time, more input might
272 arrive, invalidly. So now there are extra checks after an ACL has run for
273 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
274 pipelining has not been advertised.
276 PH/30 MH's patch to allow iscntrl() characters to be list separators.
278 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
279 returned in the SMTP response when smtp_return_error_details was false.
282 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
283 instead of the C I/O that was originally supplied, because problems were
286 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
287 Exim which did not show up earlier: it was assuming that a call to
288 SSL_CTX_set_info_callback() might give an error value. In fact, there is
289 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
290 was a macro that became an assignment, so it seemed to work. This has
291 changed to a proper function call with a void return, hence the compile
292 error. Exim's code has been fixed.
294 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
297 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
299 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
301 PH/37 If a message is not accepted after it has had an id assigned (e.g.
302 because it turns out to be too big or there is a timeout) there is no
303 "Completed" line in the log. When some messages of this type were
304 selected by exigrep, they were listed as "not completed". Others were
305 picked up by some special patterns. I have improved the selection
306 criteria to be more general.
308 PH/38 The host_find_failed option in the manualroute router can now be set
309 to "ignore", to completely ignore a host whose IP address cannot be
310 found. If all hosts are ignored, the behaviour is controlled by the new
311 host_all_ignored option.
313 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
314 homing or because of multiple MX records with /mx) generated more than
315 one IP address, and the following item turned out to be the local host,
316 all the secondary addresses of the first item were incorrectly removed
317 from the list, along with the local host and any following hosts (which
318 is what is supposed to happen).
320 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
321 whoever called Exim into the -H file. In the case of the daemon it was
322 behaving confusingly. When first started, it used values for whoever
323 started the daemon, but after a SIGHUP it used the Exim user (because it
324 calls itself on a restart). I have changed the code so that it now always
327 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
328 message are rejected with the same error (e.g. no authentication or bad
329 sender address), and a DATA command is nevertheless sent (as can happen
330 with PIPELINING or a stupid MUA), the error message that was given to the
331 RCPT commands is included in the rejection of the DATA command. This is
332 intended to be helpful for MUAs that show only the final error to their
335 PH/42 Another patch from the Sieve maintainer.
337 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
338 Eximstats - Fixed some broken HTML links and added missing column headers
340 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
341 columns for Rejects, Temp Rejects, Ham, and Spam rows.
343 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
345 PH/43 Yet another patch from the Sieve maintainer.
347 PH/44 I found a way to check for a TCP/IP connection going away before sending
348 the response to the final '.' that terminates a message, but only in the
349 case where the client has not sent further data following the '.'
350 (unfortunately, this is allowed). However, in many cases there won't be
351 any further data because there won't be any more messages to send. A call
352 to select() can be used: if it shows that the input is "ready", there is
353 either input waiting, or the socket has been closed. An attempt to read
354 the next input character can distinguish the two cases. Previously, Exim
355 would have sent an OK response which the client would never have see.
356 This could lead to message repetition. This fix should cure that, at
357 least in a lot of common cases.
359 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
360 advertised in response to EHLO.
366 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
367 fixed by 4.65/MH/01 (is this a record?) are fixed:
369 (i) An empty string was always treated as zero by the numeric comparison
370 operators. This behaviour has been restored.
372 (ii) It is documented that the numeric comparison operators always treat
373 their arguments as decimal numbers. This was broken in that numbers
374 starting with 0 were being interpreted as octal.
376 While fixing these problems I realized that there was another issue that
377 hadn't been noticed. Values of message_size_limit (both the global option
378 and the transport option) were treated as octal if they started with 0.
379 The documentation was vague. These values are now always treated as
380 decimal, and I will make that clear in the documentation.
386 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
387 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
390 MH/01 Don't check that the operands of numeric comparison operators are
391 integers when their expansion is in "skipping" mode (fixes bug
392 introduced by 4.64-PH/07).
394 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
395 child addresses, Exim now panics and dies. Previously, because the count
396 is held in a short int, deliveries were likely to be lost. As such a
397 large number of recipients for a single message is ridiculous
398 (performance will be very, very poor), I have chosen to impose a limit
399 rather than extend the field.
405 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
406 leftover -K file (the existence of which was triggered by #402).
407 While we were at it, introduced process PID as part of the -K
408 filename. This should rule out race conditions when creating
411 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
412 processing considerably. Previous code took too long for large mails,
413 triggering a timeout which in turn triggers #401.
415 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
416 in the DK code in transports.c. sendfile() is not really portable,
417 hence the _LINUX specificness.
419 TF/01 In the add_headers option to the mail command in an Exim filter,
420 there was a bug that Exim would claim a syntax error in any
421 header after the first one which had an odd number of characters
424 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
425 callout verification, Exim cached a "reject" for the entire domain. This
426 is correct for most verifications, but it is not correct for a recipient
427 verification with use_sender or use_postmaster set, because in that case
428 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
429 case of MAIL FROM:<> rejection from other early rejections (e.g.
430 rejection of HELO). When verifying a recipient using a non-null MAIL
431 address, the cache is ignored if it shows MAIL FROM:<> rejection.
432 Whatever the result of the callout, the value of the domain cache is
433 left unchanged (for any other kind of callout, getting as far as trying
434 RCPT means that the domain itself is ok).
436 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
439 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
440 manifest itself as EPIPE rather than ECONNECT. When tidying away a
441 session, the daemon ignores ECONNECT errors and logs others; it now
442 ignores EPIPE as well.
444 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
445 (quoted-printable decoding).
447 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
448 later the small subsequent patch to fix an introduced bug.
450 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
452 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
454 PH/08 An error is now given if message_size_limit is specified negative.
456 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
457 to be given (somewhat) arbitrary names.
459 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
462 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
463 miscellaneous code fixes
465 PH/10 Added the log_reject_target ACL modifier to specify where to log
468 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
469 hostname. This is wrong, because it relates to the incoming message (and
470 probably the interface on which it is arriving) and not to the outgoing
471 callout (which could be using a different interface). This has been
472 changed to use the value of the helo_data option from the smtp transport
473 instead - this is what is used when a message is actually being sent. If
474 there is no remote transport (possible with a router that sets up host
475 addresses), $smtp_active_hostname is used.
477 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
478 tweaks were necessary in order to get it to work (see also 21 below):
479 (a) The code assumed that strncpy() returns a negative number on buffer
480 overflow, which isn't the case. Replaced with Exim's string_format()
482 (b) There were several signed/unsigned issues. I just did the minimum
483 hacking in of casts. There is scope for a larger refactoring.
484 (c) The code used strcasecmp() which is not a standard C function.
485 Replaced with Exim's strcmpic() function.
486 (d) The code set only $1; it now sets $auth1 as well.
487 (e) A simple test gave the error "authentication client didn't specify
488 service in request". It would seem that Dovecot has changed its
489 interface. Fortunately there's a specification; I followed it and
490 changed what the client sends and it appears to be working now.
492 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
495 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
496 address A is aliased to B and C, where B exists and C does not. Without
497 -v the output is "A verified" because verification stops after a
498 successful redirection if more than one address is generated. However,
499 with -v the child addresses are also verified. Exim was outputting "A
500 failed to verify" and then showing the successful verification for C,
501 with its parentage. It now outputs "B failed to verify", showing B's
502 parentage before showing the successful verification of C.
504 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
505 look up a TXT record in a specific list after matching in a combined
508 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
509 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
510 they consult the DNS. I had assumed they would set it the way they
511 wanted; and indeed my experiments on Linux seem to show that in some
512 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
513 To be on the safe side, however, I have now made the interface to
514 host_find_byname() similar to host_find_bydns(), with an argument
515 containing the DNS resolver options. The host_find_byname() function now
516 sets these options at its start, just as host_find_bydns() does. The smtp
517 transport options dns_qualify_single and dns_search_parents are passed to
518 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
519 of host_find_byname() use the default settings of RES_DEFNAMES
520 (qualify_single) but not RES_DNSRCH (search_parents).
522 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
523 spool_read_header() do less string testing, by means of a preliminary
524 switch on the second character of optional "-foo" lines. (This is
525 overdue, caused by the large number of possibilities that now exist.
526 Originally there were few.) While I was there, I also converted the
527 str(n)cmp tests so they don't re-test the leading "-" and the first
528 character, in the hope this might squeeze out yet more improvement.
530 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
531 flag allowing group syntax was set by the header_syntax check but not
532 turned off, possible causing trouble later; (2) The flag was not being
533 set at all for the header_verify test, causing "group"-style headers to
534 be rejected. I have now set it in this case, and also caused header_
535 verify to ignore an empty address taken from a group. While doing this, I
536 came across some other cases where the code for allowing group syntax
537 while scanning a header line wasn't quite right (mostly, not resetting
538 the flag correctly in the right place). These bugs could have caused
539 trouble for malformed header lines. I hope it is now all correct.
541 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
542 with the "reply" argument non-NULL. The code, however (which originally
543 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
544 but it didn't always do it. This confused somebody who was copying the
545 code for some other use. I have removed all the tests.
547 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
548 feature that was used to support insecure browsers during the U.S. crypto
549 embargo. It requires special client support, and Exim is probably the
550 only MTA that supported it -- and would never use it because real RSA is
551 always available. This code has been removed, because it had the bad
552 effect of slowing Exim down by computing (never used) parameters for the
553 RSA_EXPORT functionality.
555 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
556 authenticator to fail if there's a tab character in the incoming data
557 (there should never be unless someone is messing about, as it's supposed
558 to be base64-encoded). Also added, on Timo's advice, the "secured" option
559 if the connection is using TLS or if the remote IP is the same as the
560 local IP, and the "valid-client-cert option" if a client certificate has
563 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
564 authenticators. This can be used for authorization after authentication
565 succeeds. (In the case of plaintext, it servers for both authentication
568 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
569 if any retry times were supplied.
571 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
572 connection, where there is no client IP address to check. In this
573 situation, the verify now always succeeds.
575 PH/25 Applied John Jetmore's -Mset patch.
577 PH/26 Added -bem to be like -Mset, but loading a message from a file.
579 PH/27 In a string expansion for a processed (not raw) header when multiple
580 headers of the same name were present, leading whitespace was being
581 removed from all of them, but trailing whitespace was being removed only
582 from the last one. Now trailing whitespace is removed from each header
583 before concatenation. Completely empty headers in a concatenation (as
586 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
587 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
589 PH/29 [Removed. This was a change that I later backed out, and forgot to
590 correct the ChangeLog entry (that I had efficiently created) before
591 committing the later change.]
593 PH/30 Exim was sometimes attempting to deliver messages that had suffered
594 address errors (4xx response to RCPT) over the same connection as other
595 messages routed to the same hosts. Such deliveries are always "forced",
596 so retry times are not inspected. This resulted in far too many retries
597 for the affected addresses. The effect occurred only when there were more
598 hosts than the hosts_max_try setting in the smtp transport when it had
599 the 4xx errors. Those hosts that it had tried were not added to the list
600 of hosts for which the message was waiting, so if all were tried, there
601 was no problem. Two fixes have been applied:
603 (i) If there are any address or message errors in an SMTP delivery, none
604 of the hosts (tried or untried) are now added to the list of hosts
605 for which the message is waiting, so the message should not be a
606 candidate for sending over the same connection that was used for a
607 successful delivery of some other message. This seems entirely
608 reasonable: after all the message is NOT "waiting for some host".
609 This is so "obvious" that I'm not sure why it wasn't done
610 previously. Hope I haven't missed anything, but it can't do any
611 harm, as the worst effect is to miss an optimization.
613 (ii) If, despite (i), such a delivery is accidentally attempted, the
614 routing retry time is respected, so at least it doesn't keep
615 hammering the server.
617 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
618 in ${readsocket because some servers need this prod.
620 PH/32 Added some extra debug output when updating a wait-xxx database.
622 PH/33 The hint "could be header name not terminated by colon", which has been
623 given for certain expansion errors for a long time, was not being given
624 for the ${if def:h_colon_omitted{... case.
626 PH/34 The spec says: "With one important exception, whenever a domain list is
627 being scanned, $domain contains the subject domain." There was at least
628 one case where this was not true.
630 PH/35 The error "getsockname() failed: connection reset by peer" was being
631 written to the panic log as well as the main log, but it isn't really
632 panic-worthy as it just means the connection died rather early on. I have
633 removed the panic log writing for the ECONNRESET error when getsockname()
636 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
637 runs only) independently of the message's sender address. This meant
638 that, if the 4xx error was in fact related to the sender, a different
639 message to the same recipient with a different sender could confuse
640 things. In particualar, this can happen when sending to a greylisting
641 server, but other circumstances could also provoke similar problems.
642 I have changed the default so that the retry time for these errors is now
643 based a combination of the sender and recipient addresses. This change
644 can be overridden by setting address_retry_include_sender=false in the
647 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
648 remote server are returned as part of bounce messages. This was not
649 happening for LMTP over a pipe (the lmtp transport), but now it is the
650 same for both kinds of LMTP.
652 PH/38 Despite being documented as not happening, Exim was rewriting addresses
653 in header lines that were in fact CNAMEs. This is no longer the case.
655 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
656 and queue runs started by the daemon processed all messages. This has
657 been fixed so that -R and -S can now usefully be given with -q<time>.
659 PH/40 Import PCRE release 6.7 (fixes some bugs).
661 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
663 PH/42 Give an error if -q is specified more than once.
665 PH/43 Renamed the variables $interface_address and $interface_port as
666 $received_ip_address and $received_port, to make it clear that these
667 values apply to message reception, and not to the outgoing interface when
668 a message is delivered. (The old names remain recognized, of course.)
670 PH/44 There was no timeout on the connect() call when using a Unix domain
671 socket in the ${readsocket expansion. There now is.
673 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
674 be meaningful with "accept".
676 SC/01 Eximstats V1.43
677 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
679 SC/02 Eximstats V1.44
680 Use a glob alias rather than an array ref in the generated
681 parser. This improves both readability and performance.
683 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
684 Collect SpamAssassin and rejection statistics.
685 Don't display local sender or destination tables unless
686 there is data to show.
687 Added average volumes into the top table text output.
689 SC/04 Eximstats V1.46
690 Collect data on the number of addresses (recipients)
691 as well as the number of messages.
693 SC/05 Eximstats V1.47
694 Added 'Message too big' to the list of mail rejection
695 reasons (thanks to Marco Gaiarin).
697 SC/06 Eximstats V1.48
698 Mainlog lines which have GMT offsets and are too short to
699 have a flag are now skipped.
701 SC/07 Eximstats V1.49 (Alain Williams)
702 Added the -emptyok flag.
704 SC/08 Eximstats V1.50
705 Fixes for obtaining the IP address from reject messages.
707 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
708 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
709 whitesspace changes from 4.64-PH/27
711 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
714 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
715 are found, allow negative numbers in numeric criteria)
717 JJ/06 exipick.20061117.2, added new $message_body_missing variable
719 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
720 to match changes made in 4.64-PH/43
722 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
724 PH/47 Put in an explicit test for a DNS lookup of an address record where the
725 "domain" is actually an IP address, and force a failure. This locks out
726 those revolvers/nameservers that support "A-for-A" lookups, in
727 contravention of the specifications.
729 PH/48 When a host name was looked up from an IP address, and the subsequent
730 forward lookup of the name timed out, the host name was left in
731 $sender_host_name, contrary to the specification.
733 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
734 restricted to single-key lookups, Exim was not diagnosing an error if
735 * or *@ was used with a query-style lookup.
737 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
739 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
740 long ago, but noone interested enough thought of it. Let's just say that
741 the "1.1" means that there are some new functions that weren't there at
742 some point in the past.
744 PH/51 Error processing for expansion failure of helo_data from an smtp
745 transport during callout processing was broken.
747 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
748 tested/used via the -bh/-bhc/-bs options.
750 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
751 bug, fixed in subsequent PCRE releases).
753 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
754 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
756 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
762 SC/01 Use a glob alias rather than an array ref in eximstats generated
763 parser. This improves both readability and performance.
765 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
766 Don't display local sender or destination tables in eximstats unless
767 there is data to show.
768 Added average volumes into the eximstats top table text output.
770 SC/03 Collect data on the number of addresses (recipients) as well
771 as the number of messages in eximstats.
773 TF/01 Correct an error in the documentation for the redirect router. Exim
774 does (usually) call initgroups() when daemonizing.
776 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
777 with consistent privilege compared to when running as a daemon.
779 TF/03 Note in the spec that $authenticated_id is not set for local
780 submissions from trusted users.
782 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
783 Thanks to Dean Brooks <dean@iglou.com> for the patch.
785 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
786 by adding some example configuration directives to the default
787 configuration file. A little bit of work is required to uncomment the
788 directives and define how usernames and passwords are checked, but
789 there is now a framework to start from.
791 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
792 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
793 without this. I don't know how relevant this is to other LDAP libraries.
795 PH/02 Add the verb name to the "unknown ACL verb" error.
797 PH/03 Magnus Holmgren's patch for filter_prepend_home.
799 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
801 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
802 directory not expanded when it should be if an expanded home directory
803 was set for the address (which is overridden by the transport).
805 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
808 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
809 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
810 because it is too late at that time, and has no effect.
812 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
813 security issue with \' (bugzilla #107). I could not use the
814 PQescapeStringConn() function, because it needs a PGconn value as one of
817 PH/08 When testing addresses using -bt, indicate those final addresses that
818 are duplicates that would not cause an additional delivery. At least one
819 person was confused, thinking that -bt output corresponded to deliveries.
820 (Suppressing duplicates isn't a good idea as you lose the information
821 about possibly different redirections that led to the duplicates.)
823 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
824 systems where poll() doesn't work, in particular OS X.
826 PH/10 Added more information to debugging output for retry time not reached.
828 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
829 operations in malware.c.
831 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
834 PH/13 If write_rejectlog was set false when logging was sent to syslog with
835 syslog_duplication set false, log lines that would normally be written
836 both the the main log and to the reject log were not written to syslog at
839 PH/14 In the default configuration, change the use of "message" in ACL warn
840 statements to "add_header".
842 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
843 not followed by a command (e.g. "seen endif").
845 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
846 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
849 PH/17 Added extra conditions to the default value of delay_warning_condition
853 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
854 { match{$h_precedence:}{(?i)bulk|list|junk} } \
855 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
858 The Auto-Submitted: and various List- headers are standardised, whereas I
859 don't think Precedence: ever was.
861 PH/18 Refactored debugging code in route_finduser() to show more information,
862 in particular, the error code if getpwnam() issues one.
864 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
865 This is apparently needed in addition to the PH/07 change above to avoid
866 any possible encoding problems.
868 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
869 but not after initializing Perl.
871 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
872 output them only if debugging. By default they are written stderr,
873 apparently, which is not desirable.
875 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
878 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
881 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
883 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
884 authenticated or an ident call has been made. Suppress the default
885 values for $authenticated_id and $authenticated_sender (but permit -oMai
886 and -oMas) when testing with -bh.
888 PH/24 Re-jigged the order of the tests in the default configuration so that the
889 tests for valid domains and recipients precede the DNS black list and CSA
890 tests, on the grounds that those ones are more expensive.
892 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
893 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
894 This bug exists in every version of Exim that I still have, right back to
897 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
898 However, an attempt to turn on case-sensitivity in a regex key by
899 including (?-i) didn't work because the subject string was already
900 lowercased, and the effects were non-intuitive. It turns out that a
901 one-line patch can be used to allow (?-i) to work as expected.
907 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
908 other effects) broke the use of negated acl sub-conditions.
910 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
913 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
914 "Deny" causes Exim to reject the incoming connection with a 554 error.
915 Unfortunately, if there is a major crisis, such as a disk failure,
916 tcp-wrappers gives "deny", whereas what one would like would be some
917 kind of temporary error. A kludge has been added to help with this.
918 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
919 554 error is used if errno is still zero or contains ENOENT (which occurs
920 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
923 PH/03 Add -lutil to the default FreeBSD LIBS setting.
925 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
926 errors. Otherwise a message that provokes a temporary error (when other
927 messages do not) can cause a whole host to time out.
929 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
930 addresses were routed directly to files or pipes from a redirect router.
931 File deliveries just didn't batch; pipe deliveries might have suffered
934 PH/06 A failure to get a lock for a hints database would erroneously always say
935 "Failed to get write lock", even when it was really a read lock.
937 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
938 of 0600. This has been changed to use the value of the lockfile_mode
939 option (which defaults to 0600).
941 PH/08 Applied small patch from the Sieve maintainer.
943 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
944 folder from quota calculations, a direct delivery into this folder messed
945 up the contents of the maildirsize file. This was because the regex was
946 used only to exclude .Trash (or whatever) when the size of the mailbox
947 was calculated. There was no check that a delivery was happening into an
948 excluded directory. This bug has been fixed by ignoring all quota
949 processing for deliveries into excluded directories.
951 PH/10 Added the maildirfolder_create_regex option to appendfile.
957 PH/01 The code for finding all the local interface addresses on a FreeBSD
958 system running IPv6 was broken. This may well have applied to all BSD
959 systems, as well as to others that have similar system calls. The broken
960 code found IPv4 interfaces correctly, but gave incorrect values for the
961 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
962 that it would not match correctly against @[] and not recognize the IPv6
965 PH/02 The ipliteral router was not recognizing addresses of the form user@
966 [ipv6:....] because it didn't know about the "ipv6:" prefix.
968 PH/03 Added disable_ipv6.
970 PH/04 Changed $reply_address to use the raw form of the headers instead of the
971 decoded form, because it is most often used to construct To: headers
972 lines in autoreplies, and the decoded form may well be syntactically
973 invalid. However, $reply_address has leading white space removed, and all
974 newlines turned into spaces so that the autoreply transport does not
977 PH/05 If group was specified without a user on a router, and no group or user
978 was specified on a transport, the group from the router was ignored.
980 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
981 for visible compile-time settings that can be used to change these
982 numbers, for those that want even more. Backwards compatibility with old
983 spool files has been maintained. However, going back to a previous Exim
984 release will lost any variables that are in spool files.
986 PH/07 Two small changes when running in the test harness: increase delay when
987 passing a TCP/IP connection to a new process, in case the original
988 process has to generate a bounce, and remove special handling of
989 127.0.0.2 (sic), which is no longer necessary.
991 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
992 be the same on different OS.
994 PH/09 Moved a debug statement in filter processing to avoid a race problem when
997 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
998 whether --show-vars was specified or not
1000 JJ/02 exipick: Added support for new ACL variable spool format introduced
1003 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1004 syntactically invalid From: or Reply-to: line, and a filter used this to
1005 generate an autoreply, and therefore failed to obtain an address for the
1006 autoreply, Exim could try to deliver to a non-existent relative file
1007 name, causing unrelated and misleading errors. What now happens is that
1008 it logs this as a hard delivery error, but does not attempt to create a
1011 PH/11 The exinext utility has a -C option for testing purposes, but although
1012 the given file was scanned by exinext itself; it wasn't being passed on
1013 when Exim was called.
1015 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1016 an end-of-file indication when reading a command response.
1018 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1019 compiled. In many other places in Exim, IPv6 addresses are always
1020 recognized, so I have changed this. It also means that IPv4 domain
1021 literals of the form [IPV4:n.n.n.n] are now always recognized.
1023 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1024 used if the router is not running as root, for example, when verifying at
1025 ACL time, or when using -bh. The debugging output from this situation was
1026 non-existent - all you got was a failure to exec. I have made two
1029 (a) Failures to set uid/gid, the current directory, or a process leader
1030 in a subprocess such as that created by queryprogram now generate
1031 suitable debugging ouput when -d is set.
1033 (b) The queryprogram router detects when it is not running as root,
1034 outputs suitable debugging information if -d is set, and then runs
1035 the subprocess without attempting to change uid/gid.
1037 PH/15 Minor change to Makefile for building test_host (undocumented testing
1040 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1041 additional section of a DNS packet that returns MX or SRV records.
1042 Instead, it always explicitly searches for A/AAAA records. This avoids
1043 major problems that occur when a DNS server includes only records of one
1044 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1045 fixed another bug: if SRV records were looked up and the corresponding
1046 address records were *not* found in the additional section, the port
1047 values from the SRV records were lost.
1049 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1050 using the correct key (the original address) when searching the retry
1051 rules in order to find which one to use for generating the retry hint.
1053 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1054 adding the default one. Similarly, if it contains a Reply-To: header, the
1055 errors_reply_to option, if set, is not used.
1057 PH/19 When calculating a retry time, Exim used to measure the "time since
1058 failure" by looking at the "first failed" field in the retry record. Now
1059 it does not use this if it is later than than the arrival time of the
1060 message. Instead it uses the arrival time. This makes for better
1061 behaviour in cases where some deliveries succeed, thus re-setting the
1062 "first failed" field. An example is a quota failure for a huge message
1063 when small messages continue to be delivered. Without this change, the
1064 "time since failure" will always be short, possible causing more frequent
1065 delivery attempts for the huge message than are intended.
1066 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1068 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1069 $1, $2, $3) because the numerical variables can be reset during some
1070 expansion items (e.g. "match"), thereby losing the authentication data.
1072 PH/21 Make -bV show the size of off_t variables so that the test suite can
1073 decide whether to run tests for quotas > 2G.
1075 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1076 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1077 filecount value is greater than 2G or if a quota value is greater than 2G
1078 on a system where the size of off_t is not greater than 4, a panic error
1081 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1082 never match. The debug and -bh output now contains an explicit error
1083 message indicating a malformed IPv4 address or mask.
1085 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1086 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1087 PH/23 above applies.
1089 PH/25 Do not write to syslog when running in the test harness. The only
1090 occasion when this arises is a failure to open the main or panic logs
1091 (for which there is an explicit test).
1093 PH/26 Added the /no_tell option to "control=freeze".
1095 PH/27 If a host name lookup failed very early in a connection, for example, if
1096 the IP address matched host_lookup and the reverse lookup yielded a name
1097 that did not have a forward lookup, an error message of the form "no IP
1098 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1099 could be logged. Now it outputs the IP address instead of "NULL".
1101 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1102 allows the sender and the authenticated sender to be set when
1103 submitting a message from within Exim. Since child_open_exim() is
1104 documented for local_scan(), the new function should be too.
1106 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1107 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1108 results in an empty string is now treated as unset.
1110 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1112 PH/31 Added sender_verify_fail logging option.
1114 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1115 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1116 tidied the source and removed it altogether.
1118 PH/33 When a queue run was abandoned because the load average was too high, a
1119 log line was always written; now it is written only if the queue_run log
1120 selector is set. In addition, the log line for abandonment now contains
1121 information about the queue run such as the pid. This is always present
1122 in "start" and "stop" lines but was omitted from the "abandon" line.
1124 PH/34 Omit spaces between a header name and the colon in the error message that
1125 is given when verify = headers_syntax fails (if there are lots of them,
1126 the message gets confusing).
1128 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1129 names, as there are now some PTR records that contain slashes. This check
1130 is only to protect against broken name servers that fall over on strange
1131 characters, so the fact that it applies to all lookups doesn't matter.
1133 PH/36 Now that the new test suite is complete, we can remove some of the
1134 special code in Exim that was needed for the old test suite. For example,
1135 sorting DNS records because real resolvers return them in an arbitrary
1136 order. The new test suite's fake resolver always returns records in the
1139 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1140 bounces) except when queue_only is set, to avoid logging races between
1141 the different processes.
1143 PH/38 Panic-die if .include specifies a non-absolute path.
1145 PH/39 A tweak to the "H" retry rule from its user.
1147 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1148 a label. They prevented compilation on older perls.
1150 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1151 a warning to be raised on newish perls.
1153 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1154 on queue. Changes to match documented behaviour of showing count of
1155 messages matching specified criteria.
1157 PH/40 Changed the default ident timeout from 30s to 5s.
1159 PH/41 Added support for the use of login_cap features, on those BSD systems
1160 that have them, for controlling the resources used by pipe deliveries.
1162 PH/42 The content-scanning code uses fopen() to create files in which to put
1163 message data. Previously it was not paying any attention to the mode of
1164 the files. Exim runs with umask(0) because the rest of the code creates
1165 files with open(), and sets the required mode explicitly. Thus, these
1166 files were ending up world-writeable. This was not a big issue, because,
1167 being within the spool directory, they were not world-accessible. I have
1168 created a function called modefopen, which takes an additional mode
1169 argument. It sets umask(777), creates the file, chmods it to the required
1170 mode, then resets the umask. All the relevant calls to fopen() in the
1171 content scanning code have been changed to use this function.
1173 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1174 to 24 hours. This avoids potential overflow problems when processing G
1175 and H retry rules. I suspect nobody ever tinkers with this value.
1177 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1179 PH/45 When the plaintext authenticator is running as a client, the server's
1180 challenges are checked to ensure they are valid base64 strings. By
1181 default, the authentication attempt is cancelled if an invalid string is
1182 received. Setting client_ignore_invalid_base64 true ignores these errors.
1183 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1184 they are received. Thus, the responses can be made to depend on the
1185 challenges. If an invalid string is ignored, an empty string is placed in
1188 PH/46 Messages that are created by the autoreply transport now contains a
1189 References: header, in accordance with RFCs 2822 and 3834.
1191 PH/47 Added authenticated_sender_force to the smtp transport.
1193 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1195 PH/49 Installed latest patch from the Sieve maintainer.
1197 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1198 was also set, the appendfile transport was unnecessarily scanning a
1199 directory of message files (e.g. for maildir delivery) to find the count
1200 of files (along with the size), even though it did not need this
1201 information. It now does the scan only if it needs to find either the
1202 size of the count of files.
1204 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1206 PH/52 Two bugs concerned with error handling when the smtp transport is
1209 (i) Exim was not creating retry information for temporary errors given
1210 for individual recipients after the DATA command when the smtp transport
1211 was used in LMTP mode. This meant that they could be retried too
1212 frequently, and not timed out correctly.
1214 (ii) Exim was setting the flag that allows error details to be returned
1215 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1216 recipients that were returned after the DATA command.
1218 PH/53 This is related to PH/52, but is more general: for any failing address,
1219 when detailed error information was permitted to be returned to the
1220 sender, but the error was temporary, then after the final timeout, only
1221 "retry timeout exceeded" was returned. Now it returns the full error as
1222 well as "retry timeout exceeded".
1224 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1225 do this, and (what is worse) MTAs that accept it.
1227 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1228 will now be deprecated.
1230 PH/56 New os.c-cygwin from the Cygwin maintainer.
1232 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1233 formats (previously only available in exim formats via -bpr, -bpru,
1234 and -bpra. Now also available in native and exiqgrep formats)
1236 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1237 with very large, slow to parse queues
1239 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1241 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1243 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1244 responses to authentication challenges, though it was showing the
1245 challenges; (ii) I've removed the CR characters from the debug output for
1248 PH/58 Allow for the insertion of a newline as well as a space when a string
1249 is turned into more than one encoded-word during RFC 2047 encoding. The
1250 Sieve code now uses this.
1252 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1253 data_4xx, lost_connection, tls_required.
1255 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1256 message was being sent as an SMTP response.
1258 PH/61 Add -l and -k options to exicyclog.
1260 PH/62 When verifying, if an address was redirected to one new address, so that
1261 verification continued, and the new address failed or deferred after
1262 having set something in $address_data, the value of $address_data was not
1263 passed back to the ACL. This was different to the case when no
1264 redirection occurred. The value is now passed back in both cases.
1266 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1267 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1268 use login_cap.h, so on its own it isn't the distinguishing feature. The
1269 new name refers directly to the setclassresources() function.
1271 PH/65 Added configuration files for NetBSD3.
1273 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1275 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1276 is preferred over IPv4.
1278 PH/68 The bounce_return_message and bounce_return_body options were not being
1279 honoured for bounces generated during the reception of non-SMTP messages.
1280 In particular, this applied to messages rejected by the ACL. This bug has
1281 been fixed. However, if bounce_return_message is true and bounce_return_
1282 body is false, the headers that are returned for a non-SMTP message
1283 include only those that have been read before the error was detected.
1284 (In the case of an ACL rejection, they have all been read.)
1286 PH/69 The HTML version of the specification is now built in a directory called
1287 spec_html instead of spec.html, because the latter looks like a path with
1288 a MIME-type, and this confuses some software.
1290 PH/70 Catch two compiler warnings in sieve.c.
1292 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1293 function verify_get_ident() calls ip_connect() to connect a socket, but
1294 if the "connect()" function timed out, ip_connect() used to close the
1295 socket. However, verify_get_ident() also closes the socket later, and in
1296 between Exim writes to the log, which may get opened at this point. When
1297 the socket was closed in ip_connect(), the log could get the same file
1298 descriptor number as the socket. This naturally causes chaos. The fix is
1299 not to close the socket in ip_connect(); the socket should be closed by
1300 the function that creates it. There was only one place in the code where
1301 this was missing, in the iplookup router, which I don't think anybody now
1302 uses, but I've fixed it anyway.
1304 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1305 well as to direct DNS lookups. Otherwise the handling of names in host
1306 lists is inconsistent and therefore confusing.
1312 PH/01 Two changes to the default runtime configuration:
1314 (1) Move the checks for relay_from_hosts and authenticated clients from
1315 after to before the (commented out) DNS black list checks.
1317 (2) Add control=submission to the relay_from_hosts and authenticated
1318 clients checks, on the grounds that messages accepted by these
1319 statements are most likely to be submissions.
1321 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1323 (1) Generate an error if the third argument for the ${prvs expansion is
1326 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1329 (3) Reset the variables that are obtained from the first argument of
1330 ${prvscheck and used in the second argument before leaving the code,
1331 because their memory is reclaimed, so using them afterwards may do
1334 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1335 one (it's much easier than Tom thought :-).
1337 (5) Because of (4), we can now allow for the use of $prvscheck_result
1338 inside the third argument.
1340 PH/03 For some reason, the default setting of PATH when running a command from
1341 a pipe transport was just "/usr/bin". I have changed it to
1344 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1345 anything to be listed in the output from -bV.
1347 PH/05 When a filter generated an autoreply, the entire To: header line was
1348 quoted in the delivery log line, like this:
1350 => >A.N.Other <ano@some.domain> <original@ddress> ...
1352 This has been changed so that it extracts the operative address. There
1353 may be more than one such address. If so, they are comma-separated, like
1356 => >ano@some.domain,ona@other.domain <original@ddress> ...
1358 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1359 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1360 not being looked up in the rDNS to get a host name, Exim was showing the
1361 IP address twice in Received: lines, even though the IP addresses were
1362 identical. For example:
1364 Received: from [1.2.3.4] (helo=[1.2.3.4])
1366 However, if the real host name was known, it was omitting the HELO data
1367 if it matched the actual IP address. This has been tidied up so that it
1368 doesn't show the same IP address twice.
1370 PH/07 When both +timestamp and +memory debugging was on, the value given by
1371 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1372 called by the debug printing, thereby overwriting the timestamp buffer.
1373 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1375 PH/08 When the original message was included in an autoreply transport, it
1376 always said "this is a copy of the message, including all the headers",
1377 even if body_only or headers_only was set. It now gives an appropriate
1380 PH/09 Applied a patch from the Sieve maintainer which:
1382 o fixes some comments
1383 o adds the (disabled) notify extension core
1384 o adds some debug output for the result of if/elsif tests
1385 o points to the current vacation draft in the documentation
1386 and documents the missing references header update
1390 o fixes a bug in processing the envelope test (when testing
1391 multiple envelope elements, the last element determinted the
1394 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1395 Electronic Mail") by including:
1397 Auto-submitted: auto-generated
1399 in the messages that it generates (bounce messages and others, such as
1400 warnings). In the case of bounce messages for non-SMTP mesages, there was
1401 also a typo: it was using "Auto_submitted" (underscore instead of
1402 hyphen). Since every message generated by Exim is necessarily in response
1403 to another message, thes have all been changed to:
1405 Auto-Submitted: auto-replied
1407 in accordance with these statements in the RFC:
1409 The auto-replied keyword:
1411 - SHOULD be used on messages sent in direct response to another
1412 message by an automatic process,
1414 - MUST NOT be used on manually-generated messages,
1416 - MAY be used on Delivery Status Notifications (DSNs) and Message
1417 Disposition Notifications (MDNs),
1419 - MUST NOT be used on messages generated by automatic or periodic
1420 processes, except for messages which are automatic responses to
1423 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1424 to the default Received: header definition.
1426 PH/12 Added log selector acl_warn_skipped (default on).
1428 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1429 variables because (a) they are in the wrong storage pool and (b) even if
1430 they were copied, it wouldn't work properly because of the caching.
1432 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1433 checking when decoding. Apparently there are clients that generate
1434 overlong encoded strings. Why am I not surprised?
1436 PH/15 If the first argument of "${if match_address" was not empty, but did not
1437 contain an "@" character, Exim crashed. Now it writes a panic log message
1438 and treats the condition as false.
1440 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1442 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1443 extension "envelope-auth". The code is finished and in agreement with
1444 other implementations, but there is no documentation so far and in fact,
1445 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1446 not changing the active code.
1448 Print executed "if" and "elsif" statements when debugging is used. This
1449 helps a great deal to understand what a filter does.
1451 Document more things not specified clearly in RFC3028. I had all this
1452 sorted out, when out of a sudden new issues came to my mind. Oops."
1454 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1457 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1458 canonical form (as documented). However, after a host name lookup from
1459 the IP address, check_host() was doing a simple string comparison with
1460 addresses acquired from the DNS when checking that the found name did
1461 have the original IP as one of its addresses. Since any found IPv6
1462 addresses are likely to be in abbreviated form, the comparison could
1463 fail. Luckily, there already exists a function for doing the comparison
1464 by converting both addresses to binary, so now that is used instead of
1465 the text comparison.
1467 PH/20 There was another similar case to PH/19, when a complete host name was
1468 given in a host list; looking up its IP address could give an abbreviated
1469 form, whereas the current host's name might or might not be abbreviated.
1470 The same fix has been applied.
1476 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1477 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1480 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1481 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1483 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1485 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1486 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1487 Also, for "Auto-Submitted", treat anything other than "no" as
1488 non-personal, in accordance with RFC 3834. (Previously it treated
1489 anything starting "auto-" as non-personal.)
1491 TF/01 The control=submission/name=... option had a problem with syntax
1492 errors if the name included a slash character. The /name= option
1493 now slurps the rest of the string, so it can include any characters
1494 but it must come last in the list of options (after /sender_retain
1497 PH/05 Some modifications to the interface to the fake nameserver for the new
1505 TK/01 Added the "success_on_redirect" address verification option. See
1506 NewStuff for rationale and an example.
1508 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1510 PH/02 Patch to exigrep to allow it to work on syslog lines.
1512 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1513 fread() to skip over the body file's header line, because in Cygwin the
1514 header line is locked and is inaccessible.
1516 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1517 co-exist for some time) to make it clear that it is the Exim ID that is
1518 referenced, not the Message-ID: header line.
1520 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1521 string_format() function, because snprintf() does not exist on all
1524 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1525 ${stat: expansion item.
1527 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1528 protocol synchronization error", to keep the pedants happy.
1530 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1531 well as for IRIX systems, when gcc is being used. See the host.c source
1534 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1536 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1539 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1540 transport and to the smtp transport in LMTP mode.
1542 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1544 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1545 run a filter in a subprocess. This could lead to confusion in subsequent
1546 lookups in the parent process. There should also be a search_tidyup() at
1547 the end of the subprocess.
1549 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1550 only if the host matched helo_try_verify_hosts, which caused the
1551 verification to occur when the EHLO/HELO command was issued. The ACL just
1552 tested the remembered result. Now, if a previous verification attempt has
1553 not happened, "verify = helo" does it there and then.
1555 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1557 TK/03 Fix log output including CR from clamd.
1559 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1560 exist provoked a memory error which could cause a segfault.
1562 PH/15 Installed PCRE 6.2
1564 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1566 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1567 of the problem. Specifically, suggested +O2 rather than +O1 for the
1570 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1572 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1573 record, the port was not correctly logged when the outgoing_port log
1574 selector was set (it logged the transort's default port).
1576 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1577 fallback_hosts, and "hosts" in the smtp transport.
1579 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1580 host errors such as "Connection refused".
1582 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1583 authentication with radiusclient 0.4.9:
1585 - Error returned from rc_read_config was caught wrongly
1586 - Username/password not passed on to radius server due to wrong length.
1588 The presumption is that some radiusclient API changes for 4.51/PH/17
1589 were not taken care of correctly. The code is still untested by me (my
1590 Linux distribution still has 0.3.2 of radiusclient), but it was
1591 contributed by a Radius user.
1593 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1594 expanding the "port" option of the smtp transport.
1596 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1597 while reading a MIME header. Thanks to Tom Hughes for a patch.
1599 PH/24 Include config.h inside local_scan.h so that configuration settings are
1602 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1603 that in an ACL for RCPT (for example), you can examine exactly what was
1606 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1607 commands, but it was not correctly comparing the address with the actual
1608 client host address. Thus, it would show the EHLO address in Received:
1609 header lines when this was not necessary.
1611 PH/27 Added the % operator to ${eval:}.
1613 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1614 it should be ignoring failures (because with -C, for example, it has lost
1615 privilege). It wasn't ignoring creation failures other than "already
1618 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1621 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1622 because an input line was too long, either on its own, or by virtue of
1623 too many continuations, the temporary file was not being removed, and the
1624 return code was incorrect.
1626 PH/31 Missing "BOOL" in function definition in filtertest.c.
1628 PH/32 Applied Sieve patches from the maintainer.
1630 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1632 PH/33 Added "verify = not_blind".
1634 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1635 Local/Makefile (with some defaults set). These are used in built scripts
1636 such as exicyclog, but they have never been used in the exim_install
1637 script (though there are many overriding facilities there). I have
1638 arranged that the exim_install script now takes note of these two
1641 PH/35 Installed configuration files for Dragonfly.
1643 PH/36 When a locally submitted message by a trusted user did not contain a
1644 From: header, and the sender address was obtained from -f or from an SMTP
1645 MAIL command, and the trusted user did not use -F to supply a sender
1646 name, $originator_name was incorrectly used when constructing a From:
1647 header. Furthermore, $originator_name was used for submission mode
1648 messages from external hosts without From: headers in a similar way,
1649 which is clearly wrong.
1651 PH/37 Added control=suppress_local_fixups.
1653 PH/38 When log_selector = +received_sender was set, and the addition of the
1654 sender made the log line's construction buffer exactly full, or one byte
1655 less than full, an overflow happened when the terminating "\n" was
1658 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1659 when the result of a list match is failure because a DNS lookup failed.
1661 PH/40 RM_COMMAND is now used in the building process.
1663 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1664 the "build-* directories that it finds.
1666 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1667 address in a domain literal was a prefix of an interface address.
1669 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1670 when verifying a sender address, unless rewrite_headers is false.
1672 PH/44 Wrote a long comment about why errors_to addresses are verified as
1673 recipients, not senders.
1675 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1676 the ratelimit ACL was added.
1678 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1680 PH/46 Added extra information about PostgreSQL errors to the error string.
1682 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1683 avoiding the need to install special zones in a real server. This is
1684 backwards compatible; if it can't find the fake resolver, it drops back.
1685 Thus, both old and new test suites can be run.
1687 TF/02 Added util/ratelimit.pl
1689 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1690 clock is set back in time.
1692 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1693 Candler <B.Candler@pobox.com>.
1695 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1696 OK for addresses that are the result of redirections.
1698 PH/48 A number of further additions for the benefit of the new test suite,
1699 including a fake gethostbyname() that interfaces to the fake DNS resolver
1702 TF/06 The fix for widen_domains has also been applied to qualify_single and
1703 search_parents which are the other dnslookup options that can cause
1706 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1709 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1711 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1712 service" if it encountered an MX record with an empty target hostname.
1713 The message is now "an MX or SRV record indicated no SMTP service".
1715 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1716 if the DNS of the sending site is misconfigured. This is quite a
1717 common situation. This change restores the behaviour of treating a
1718 helo verification defer as a failure.
1720 PH/51 If self=fail was set on a router, the bounce message did not include the
1721 actual error message.
1727 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1729 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1730 command itself ended in error, the underlying message about the transport
1731 filter timeout was being overwritten with the pipe command error. Now the
1732 underlying error message should be appended to the second error message.
1734 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1736 PH/02 Reduce the amount of output that "make" produces by default. Full output
1737 can still be requested.
1739 PH/03 The warning log line about a condition test deferring for a "warn" verb
1740 was being output only once per connection, rather than after each
1741 occurrence (because it was using the same function as for successful
1742 "warn" verbs). This seems wrong, so I have changed it.
1744 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1745 it should not have, which might have caused a crash in the right
1746 circumstances, but probably never did.
1748 PH/04 Installed a modified version of Tony Finch's patch to make submission
1749 mode fix the return path as well as the Sender: header line, and to
1750 add a /name= option so that you can make the user's friendly name appear
1753 TF/03 Added the control = fakedefer ACL modifier.
1755 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1756 Mark Lowes for thorough testing.
1758 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1760 TK/03 Merged latest SRS patch from Miles Wilton.
1762 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1763 with the definition in sysexits.h (which is #included earlier).
1764 Fortunately, Exim does not actually use EX_OK. The code used to try to
1765 preserve the sysexits.h value, by assumimg that macro definitions were
1766 scanned for macro replacements. I have been disabused of this notion,
1767 so now the code just undefines EX_OK before #including unistd.h.
1769 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1770 in the smtp transport. When a block could not be written in a single
1771 write() function, the timeout was being re-applied to each part-write.
1772 This seems wrong - if the receiver was accepting one byte at a time it
1773 would take for ever. The timeout is now adjusted when this happens. It
1774 doesn't have to be particularly precise.
1776 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1777 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1779 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1780 without a domain if the check to <postmaster@domain> fails.
1782 SC/01 Eximstats: added -xls and the ability to specify output files
1783 (patch written by Frank Heydlauf).
1785 SC/02 Eximstats: use FileHandles for outputing results.
1787 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1789 SC/04 Eximstats: fixed display of large numbers with -nvr option
1791 SC/05 Eximstats: fixed merging of reports with empty tables.
1793 SC/06 Eximstats: added the -include_original_destination flag
1795 SC/07 Eximstats: removed tabs and trailing whitespace.
1797 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1799 TK/06 MBOX spool code: Add real "From " MBOX separator line
1800 so the .eml file is really in mbox format (even though
1801 most programs do not really care). Patch from Alex Miller.
1803 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1804 The latter is generated from $received_to and is only set if the
1805 message has one envelope recipient. SA can use these headers,
1806 obviously out-of-the-box. Patch from Alex Miller.
1808 PH/08 The ${def test on a variable was returning false if the variable's
1809 value was "0", contrary to what the specification has always said!
1810 The result should be true unless the variable is empty.
1812 PH/09 The syntax error of a character other than { following "${if
1813 def:variable_name" (after optional whitespace) was not being diagnosed.
1814 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1815 accidental colon was present, for example, could give incorrect results.
1817 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1818 result is used (not including appendfile, where other changes are about
1821 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1822 This involved changing a lot of size variables from int to off_t. It
1823 should work with maildirs and everything.
1825 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1826 spamd dying while we are connected to it.
1828 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1831 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1832 function for BDB 4.3.
1834 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1836 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1837 the sources for PCRE have been re-arranged and more files are now
1840 PH/15 The code I had for printing potentially long long variables in PH/11
1841 above was not the best (it lost precision). The length of off_t variables
1842 is now inspected at build time, and an appropriate printing format (%ld
1843 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1844 to be "long long int" or "long int". This is needed for the internal
1845 formatting function string_vformat().
1847 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1848 the configuration file to be ":syslog", then the script "guesses" where
1849 the logs files are, rather than using the compiled in default. In our
1850 case the guess is not the same as the compiled default, so the script
1851 suddenly stopped working when I started to use syslog. The patch checks
1852 to see if log_file_path is "". If so, it attempts to read it from exim
1853 with no configuration file to get the compiled in version, before it
1854 falls back to the previous guessing code."
1856 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1857 implementing BATV in an Exim configuration. See NewStuff for the gory
1860 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1861 Makefile that are specific to HP-UX.
1863 PH/18 If the "use_postmaster" option was set for a recipient callout together
1864 with the "random" option, the postmaster address was used as the MAIL
1865 FROM address for the random test, but not for the subsequent recipient
1866 test. It is now used for both.
1868 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1869 patch removes a few documentation additions to RFC 3028, because the
1870 latest draft now contains them. It adds the new en;ascii-case comparator
1871 and a new error check for 8bit text in MIME parts. Comparator and
1872 require names are now matched exactly. I enabled the subaddress
1873 extension, but it is not well tested yet (read: it works for me)."
1875 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1876 rework some of the code of TK/09 above to avoid the hardwired use of
1877 "%lld" and "long long". Replaced the call to snprintf() with a call to
1880 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1881 records point to non-existent hosts", "retry timeout exceeded", and
1882 "retry time not reached for any host after a long failure period".
1884 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1885 experimental DomainKeys support:
1887 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1888 (2) On an error such as an illegally used "control", the wrong name for
1889 the control was given.
1891 These problems did NOT occur unless DomainKeys support was compiled.
1893 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1895 PH/24 Added ${if match_ip condition.
1897 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1898 databases so that it will be absolutely obvious if a crash occurs in the
1899 DB library. This is a regular occurrence (often caused by mis-matched
1902 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1903 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1904 picked up on a user's system that detects such things. There doesn't seem
1905 to be a gcc warning option for this - only an attribute that has to be
1906 put on the function's prototype. It seems that in Fedora Core 4 they have
1907 set this on a number of new functions. No doubt there will be more in due
1910 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1911 specify a transport. However, if an address that was verified by such a
1912 router was the subject of a callout, Exim crashed because it tried to
1913 read the rcpt_include_affixes from the non-existent transport. Now it
1914 just assumes that the setting of that option is false. This bug was
1915 introduced by 4.51/PH/31.
1917 PH/28 Changed -d+all to exclude +memory, because that information is very
1918 rarely of interest, but it makes the output a lot bigger. People tend to
1919 do -d+all out of habit.
1921 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1922 code in os-type was giving problems when libc.so lives in lib64, like on
1925 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1926 aren't the modern standard, and it seems that some systems' include files
1927 don't always have them. Exim was already checking for some of the newer
1928 ones like T_AAAA, and defining it itself. I've added checks for all the
1929 record types that Exim uses.
1931 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1932 not automatically generating a new one, as it is supposed to. This
1933 prevented TLS from working. If the file did exist, but contained invalid
1934 data, a new version was generated, as expected. It was only the case of a
1935 non-existent file that was broken.
1937 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1938 with a change in libdomainkeys > 0.64.
1940 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1941 from DNS. If the selector record carries the flag, it now has
1942 precedence over the domain-wide flag.
1944 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1946 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1947 the use of a port name that isn't defined in /etc/services) occurred, the
1948 message was deferred as in a normal delivery, and thus remained on the
1949 spool, instead of being failed because of the mua_wrapper setting. This
1950 is now fixed, and I tidied up some of the mua_wrapper messages at the
1953 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1954 the messages in a hash of arrays rather than using individual hashes.
1955 This is a bit cleaner and results in dramatic memory savings, albeit
1956 at a slight CPU cost.
1958 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1959 as requested by Marc Sherman.
1961 SC/10 Eximstats: added histograms for user specified patterns as requested
1964 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1966 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1967 fopen() in the content-scanning modules that did not already have it.
1973 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1974 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1976 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1978 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1980 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1981 to test Sieve filters that use "vacation".
1983 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1984 that changes the way the GnuTLS parameters are stored in the cache file.
1985 The new format can be generated externally. For backward compatibility,
1986 if the data in the cache doesn't make sense, Exim assumes it has read an
1987 old-format file, and it generates new data and writes a new file. This
1988 means that you can't go back to an older release without removing the
1991 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1992 work if there are any delivery delays because "one_time" forces the
1993 parent to be marked "delivered", so its unseen clone is never tried
1994 again. For this reason, Exim now forbids the simultaneous setting of
1997 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1998 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1999 entry if you want to know the details. The fix, however, neglected to
2000 consider the case when local delivery batching is involved. The test for
2001 "previously delivered" was not happening when checking to see if an
2002 address could be batched with a previous (undelivered) one; under
2003 certain circumstances this could lead to multiple deliveries to the same
2006 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2007 in its include files, and this causes problems building Exim.
2009 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2010 header_syntax) but Exim was just ignoring anything given after a slash.
2011 In particular, this caused confusion with an attempt to use "verify =
2012 reverse_host_lookup/defer_ok". An error is now given when options are
2013 supplied for verify items that do not have them. (Maybe reverse_host_
2014 lookup should have a defer_ok option, but that's a different point.)
2016 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2017 defined by RFC 821) to 2048, because there were problems with some AUTH
2018 commands, and RFC 1869 says the size should be increased for extended
2019 SMTP commands that take arguments.
2021 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2024 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2025 "unknown" error; now it says that the functionality isn't in the binary.
2027 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2028 an address' error message when a string expansion fails (syntax or
2029 whatever). Otherwise the password may appear in the log. Following change
2030 PH/42 below, there is no longer a chance of it appearing in a bounce
2033 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2035 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2036 of its addresses was ever tried. (Bugzilla bug #2.)
2038 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2039 the result incorrectly in the debug output. (It correctly added a newline
2040 to what was transported.)
2042 TF/01 Added $received_time.
2044 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2045 commented out examples of how to interface to a virus scanner and to
2046 SpamAssassin. Also added commented examples of av_scanner and
2047 spamd_address settings.
2049 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2050 and controls are allowed in which ACLs. There were a couple of minor
2051 errors. Some of the entries in the conditions table (which is a table of
2052 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2053 negation of where the condition IS allowed.
2055 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2057 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2058 header file does not have a version number, so I've had to invent a new
2059 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2060 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2061 radiusclient), but it was contributed by a Radius user.
2063 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2064 files or directories, for OpenSSL.
2066 PH/19 When an Exim process that is running as root has to create an Exim log
2067 file, it does so in a subprocess that runs as exim:exim so as to get the
2068 ownership right at creation (otherwise, other Exim processes might see
2069 the file with the wrong ownership). There was no test for failure of this
2070 fork() call, which would lead to the process getting stuck as it waited
2071 for a non-existent subprocess. Forks do occasionally fail when resources
2072 run out. I reviewed all the other calls to fork(); they all seem to check
2075 PH/20 When checking for unexpected SMTP input at connect time (before writing
2076 the banner), Exim was not dealing correctly with a non-positive return
2077 from the read() function. If the client had disconnected by this time,
2078 the result was a log entry for a synchronization error with an empty
2079 string after "input=" when read() returned zero. If read() returned -1
2080 (an event I could not check), uninitialized data bytes were printed.
2081 There were reports of junk text (parts of files, etc) appearing after
2084 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2086 PH/22 Added support for macro redefinition, and (re)definition in between
2087 driver and ACL definitions.
2089 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2090 forgetting to use the resulting value; it was using the unexpanded value.
2092 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2093 hadn't been configured. The fix is from Juergen Kreileder, who
2094 understands it better than I do:
2096 "Here's what I see happening with three configured cyrus_sasl
2097 authenticators configured (plain, login, cram-md5):
2099 On startup auth_cyrus_sasl_init() gets called for each of these.
2100 This means three calls to sasl_listmech() without a specified mech_list.
2101 => SASL tests which mechs of all available mechs actually work
2102 => three warnings about OTP not working
2103 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2105 With the patch, sasl_listmech() also gets called three times. But now
2106 SASL's mech_list option is set to the server_mech specified in the the
2107 authenticator. Or in other words, the answer from sasl_listmech()
2108 gets limited to just the mech you're testing for (which is different
2110 => the return list contains just 'plain' or 'login', 'cram-md5' or
2111 nothing depending on the value of ob->server_mech.
2113 I've just tested the patch: Authentication still works fine,
2114 unavailable mechs specified in the exim configuration are still
2115 caught, and the auth.log warnings about OTP are gone."
2117 PH/25 When debugging is enabled, the contents of the command line are added
2118 to the debugging output, even when log_selector=+arguments is not
2121 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2122 answer is "GNU", and only if the return is "GNU/something" is the answer
2125 PH/27 $acl_verify_message is now set immediately after the failure of a
2126 verification in an ACL, and so is available in subsequent modifiers. In
2127 particular, the message can be preserved by coding like this:
2129 warn !verify = sender
2130 set acl_m0 = $acl_verify_message
2132 Previously, $acl_verify_message was set only while expanding "message"
2133 and "log_message" when a very denied access.
2135 PH/28 Modified OS/os.c-Linux with
2137 -#ifndef OS_LOAD_AVERAGE
2138 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2140 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2141 nomenclature these days.)
2143 PH/29 Installed patch from the Sieve maintainer that adds the options
2144 sieve_useraddress and sieve_subaddress to the redirect router.
2146 PH/30 In these circumstances:
2147 . Two addresses routed to the same list of hosts;
2148 . First host does not offer TLS;
2149 . First host accepts first address;
2150 . First host gives temporary error to second address;
2151 . Second host offers TLS and a TLS session is established;
2152 . Second host accepts second address.
2153 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2154 and peerdn, if requested) that were in fact used only for the second
2157 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2158 attention to any local part prefix or suffix that was matched by the
2159 router that accepted the address. It now behaves in the same way as it
2160 does for delivery: the affixes are removed from the local part unless
2161 rcpt_include_affixes is set on the transport.
2163 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2164 timeout during the DATA phase of an incoming message.
2166 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2167 applied a patch sanctioned by the Sieve maintainer.
2169 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2170 the uid or gid is negative. A case of a negative gid caused this to be
2171 noticed. The fix allows for either to be negative.
2173 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2174 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2177 PH/36 The change PH/12 above was broken. Fixed it.
2179 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2180 the grounds that routing the same address twice would always produce the
2181 same answer. This might have been true once, but it is certainly no
2182 longer true now. Routing a child address may depend on the previous
2183 routing that produced that child. Some complicated redirection strategies
2184 went wrong when messages had multiple recipients, and made Exim's
2185 behaviour dependent on the order in which the addresses were given.
2187 I have moved the duplicate checking until after the routing is complete.
2188 Exim scans the addresses that are assigned to local and remote
2189 transports, and removes any duplicates. This means that more work will be
2190 done, as duplicates will always all be routed, but duplicates are
2191 presumably rare, so I don't expect this is of any significance.
2193 For deliveries to pipes, files, and autoreplies, the duplicate checking
2194 still happens during the routing process, since they are not going to be
2197 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2198 It corrects a timeout issue with spamd. This is Ian's comment: "The
2199 background is that sometimes spamd either never reads data from a
2200 connection it has accepted, or it never writes response data. The exiscan
2201 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2202 blindly assumes that writes won't block so it may never time out."
2204 PH/39 Allow G after quota size as well as K and M.
2206 PH/40 The value set for $authenticated_id in an authenticator may not contain
2207 binary zeroes or newlines because the value is written to log lines and
2208 to spool files. There was no check on this. Now the value is run through
2209 the string_printing() function so that such characters are converted to
2210 printable escape sequences.
2212 PH/41 $message_linecount is a new variable that contains the total number of
2213 lines in the message. Compare $body_linecount, which is the count for the
2216 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2217 bounce and delay warning messages, except in certain special cases, which
2220 (a) An SMTP error message from a remote host;
2221 (b) A message specified in a :fail: redirection;
2222 (c) A message specified in a "fail" command in a system filter;
2223 (d) A message specified in a FAIL return from the queryprogram router;
2224 (e) A message specified by the cannot_route_message router option.
2226 In these cases only, Exim does include the error details in bounce and
2227 warning messages. There are also a few cases where bland messages such
2228 as "unrouteable address" or "local delivery error" are given.
2230 PH/43 $value is now also set for the "else" part of a ${run expansion.
2232 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2233 being worked on, but at least Exim now implements the latest version to
2236 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2237 process to complete was treated as a delivery failure, a timeout while
2238 writing the message to the pipe was logged, but erroneously treated as a
2239 successful delivery. Such timeouts include transport filter timeouts. For
2240 consistency with the overall process timeout, these timeouts are now
2241 treated as errors, giving rise to delivery failures by default. However,
2242 there is now a new Boolean option for the pipe transport called
2243 timeout_defer, which, if set TRUE, converts the failures into defers for
2244 both kinds of timeout. A transport filter timeout is now identified in
2247 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2248 systems where "make" and "gmake" are different, calling "gmake" at top
2249 level broke things. I've arranged for the value of $(MAKE) to be passed
2250 from the Makefile to this script so that it can call the same version of
2254 A note about Exim versions 4.44 and 4.50
2255 ----------------------------------------
2257 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2258 changes of various kinds. As a consequence, a big documentation update was
2259 needed. This delayed the release for rather longer than seemed good, especially
2260 in the light of a couple of (minor) security issues. Therefore, the changes
2261 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2262 release. So 4.44 and 4.50 are in effect two different branches that both start
2265 I have left the 4.50 change log unchanged; it contains all the changes since
2266 4.43. The change log for 4.44 is below; many of its items are identical to
2267 those for 4.50. This seems to be the most sensible way to preserve the
2268 historical information.
2274 1. Minor wording change to the doc/README.SIEVE file.
2276 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2277 computation of the current number of files was incorrect.
2279 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2280 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2283 4. Give more explanation in the error message when the command for a transport
2284 filter fails to execute.
2286 5. There are several places where Exim runs a non-Exim command in a
2287 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2288 was being done only for the command run by the queryprogram router. It is
2289 now done for all such subprocesses. The other cases are: ${run, transport
2290 filters, and the commands run by the lmtp and pipe transports.
2292 6. Added CONFIGURE_GROUP build-time option.
2294 7. Some older OS have a limit of 256 on the maximum number of file
2295 descriptors. Exim was using setrlimit() to set 1000 as a large value
2296 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2297 systems. I've change it so that if it can't get 1000, it tries for 256.
2299 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2300 was an oversight, and furthermore, ever since the addition of extra
2301 controls (e.g. 4.43/32), the checks on when to allow different forms of
2302 "control" were broken. There should now be diagnostics for all cases when a
2303 control that does not make sense is encountered.
2305 9. Added the /retain_sender option to "control=submission".
2307 10. $recipients is now available in the predata ACL (oversight).
2309 11. Tidy the search cache before the fork to do a delivery from a message
2310 received from the command line. Otherwise the child will trigger a lookup
2311 failure and thereby defer the delivery if it tries to use (for example) a
2312 cached ldap connection that the parent has called unbind on.
2314 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2315 of $address_data from the recipient verification was clobbered by the
2316 sender verification.
2318 13. The value of address_data from a sender verification is now available in
2319 $sender_address_data in subsequent conditions in the ACL statement.
2321 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2323 15. Added a new option "connect=<time>" to callout options, to set a different
2326 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2327 was its contents. (It was OK if the option was not defined at all.)
2329 17. A "Completed" log line is now written for messages that are removed from
2330 the spool by the -Mrm option.
2332 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2333 information about exactly what failed.
2335 19. Added -dd to debug only the daemon process.
2337 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2338 handles timeouts, both on the server side and network timeouts. Renamed the
2339 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2341 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2342 It is now set to "smtps".
2344 22. $host_address is now set to the target address during the checking of
2345 ignore_target_hosts.
2347 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2348 being passed; this would have caused $sender_host_name to have been used if
2349 matching the list had actually called for a host name (not very likely,
2350 since this list is usually IP addresses). A host name is now passed as
2353 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2354 code that specifies a non-restarting handler (typically sigaction() in
2355 modern systems) in an attempt to fix a rare and obscure crash bug.
2357 25. Narrowed the window for a race in the daemon that could cause it to ignore
2358 SIGCHLD signals. This is not a major problem, because they are used only to
2359 wake it up if nothing else does.
2361 26. A malformed maildirsize file could cause Exim to calculate negative values
2362 for the mailbox size or file count. Odd effects could occur as a result.
2363 The maildirsize information is now recalculated if the size or filecount
2366 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2367 support for a long time. Removed HAVE_SYS_VFS_H.
2369 28. Installed the latest version of exipick from John Jetmore.
2371 29. In an address list, if the pattern was not a regular expression, an empty
2372 subject address (from a bounce message) matched only if the pattern was an
2373 empty string. Non-empty patterns were not even tested. This was the wrong
2374 because it is perfectly reasonable to use an empty address as part of a
2375 database query. An empty address is now tested by patterns that are
2376 lookups. However, all the other forms of pattern expect the subject to
2377 contain a local part and a domain, and therefore, for them, an empty
2378 address still always fails if the pattern is not itself empty.
2380 30. Exim went into a mad DNS loop when attempting to do a callout where the
2381 host was specified on an smtp transport, and looking it up yielded more
2382 than one IP address.
2384 31. Re-factored the code for checking spool and log partition space into a
2385 function that finds that data and another that does the check. The former
2386 is then used to implement four new variables: $spool_space, $log_space,
2387 $spool_inodes, and $log_inodes.
2389 32. The RFC2047 encoding function was originally intended for short strings
2390 such as real names; it was not keeping to the 75-character limit for
2391 encoded words that the RFC imposes. It now respects the limit, and
2392 generates multiple encoded words if necessary. To be on the safe side, I
2393 have increased the buffer size for the ${rfc2047: expansion operator from
2396 33. It is now permitted to omit both strings after an "if" condition; if the
2397 condition is true, the result is "true". As before, when the second string
2398 is omitted, a false condition yields an empty string. This makes it less
2399 cumbersome to write custom ACL and router conditions.
2401 34. Failure to deliver a bounce message always caused it to be frozen, even if
2402 there was an errors_to setting on the router. The errors_to setting is now
2405 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2406 canonical form (fully expanded) before being placed in
2407 $sender_host_address.
2409 36. The table in the code that translates DNS record types into text (T_A to
2410 "A" for instance) was missing entries for NS and CNAME. It is just possible
2411 that this could have caused confusion if both these types were looked up
2412 for the same domain, because the text type is used as part of Exim's
2413 per-process caching. But the chance of anyone hitting this buglet seems
2416 37. The dnsdb lookup has been extended in a number of ways.
2418 (1) There is a new type, "zns", which walks up the domain tree until it
2419 finds some nameserver records. It should be used with care.
2421 (2) There is a new type, "mxh", which is like "mx" except that it returns
2422 just the host names, not the priorities.
2424 (3) It is now possible to give a list of domains (or IP addresses) to be
2425 looked up. The behaviour when one of the lookups defers can be
2426 controlled by a keyword.
2428 (4) It is now possible to specify the separator character for use when
2429 multiple records are returned.
2431 38. The dnslists ACL condition has been extended: it is now possible to supply
2432 a list of IP addresses and/or domains to be looked up in a particular DNS
2435 39. Added log_selector=+queue_time_overall.
2437 40. When running the queue in the test harness, wait just a tad after forking a
2438 delivery process, to get repeatability of debugging output.
2440 41. Include certificate and key file names in error message when GnuTLS fails
2441 to set them up, because the GnuTLS error message doesn't include the name
2442 of the failing file when there is a problem reading it.
2444 42. Allow both -bf and -bF in the same test run.
2446 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2448 44. The "Exiscan patch" is now merged into the mainline Exim source.
2450 45. Sometimes the final signoff response after QUIT could fail to get
2451 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2452 < 0 before doing a fflush(). This bug looks as though it goes back to the
2453 introduction of TLS in release 3.20, but "sometimes" must have been rare
2454 because the tests only now provoked it.
2456 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2457 (this can affect the format of dates).
2459 47. exim_tidydb, when checking for the continued existence of a message for
2460 which it has found a message-specific retry record, was not finding
2461 messages that were in split spool directories. Consequently, it was
2462 deleting retry records that should have stayed in existence.
2464 48. Steve fixed some bugs in eximstats.
2466 49. The SPA authentication driver was not abandoning authentication and moving
2467 on to the next authenticator when an expansion was forced to fail,
2468 contradicting the general specification for all authenticators. Instead it
2469 was generating a temporary error. It now behaves as specified.
2471 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2472 (the order specifies the preference for clients). The order is now AES256,
2473 AES128, 3DES, ARCFOUR128.
2475 51. Small patch to Sieve code - explicitly set From: when generating an
2478 52. Exim crashed if a remote delivery caused a very long error message to be
2479 recorded - for instance if somebody sent an entire SpamAssassin report back
2480 as a large number of 550 error lines. This bug was coincidentally fixed by
2481 increasing the size of one of Exim's internal buffers (big_buffer) that
2482 happened as part of the Exiscan merge. However, to be on the safe side, I
2483 have made the code more robust (and fixed the comments that describe what
2486 53. Now that there can be additional text after "Completed" in log lines (if
2487 the queue_time_overall log selector is set), a one-byte patch to exigrep
2488 was needed to allow it to recognize "Completed" as not the last thing in
2491 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2492 patch that reportedly fixes this has been added. I am not expert enough to
2493 create a test for it. This is what the patch creator wrote:
2495 "I found a little strange behaviour of ldap code when working with
2496 Windows 2003 AD Domain, where users was placed in more than one
2497 Organization Units. When I tried to give exim partial DN, the exit code
2498 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2499 But simultaneously result of request was absolutely normal ldap result,
2500 so I produce this patch..."
2502 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2503 REFERENCE, so I have modified the code to exclude the patch when that macro
2506 55. Some experimental protocols are using DNS PTR records for new purposes. The
2507 keys for these records are domain names, not reversed IP addresses. The
2508 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2509 leaves it alone. Component reversal etc. now happens only for IP addresses.
2512 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2514 57. Double the size of the debug message buffer (to 2048) so that more of very
2515 long debug lines gets shown.
2517 58. The exicyclog utility now does better if the number of log files to keep
2518 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2520 59. Two changes related to the smtp_active_hostname option:
2522 (1) $smtp_active_hostname is now available as a variable.
2523 (2) The default for smtp_banner uses $smtp_active_hostname instead
2524 of $primary_hostname.
2526 60. The host_aton() function is supposed to be passed a string that is known
2527 to be a valid IP address. However, in the case of IPv6 addresses, it was
2528 not checking this. This is a hostage to fortune. Exim now panics and dies
2529 if the condition is not met. A case was found where this could be provoked
2530 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2531 components; fortuitously, this particular loophole had already been fixed
2532 by change 4.50/55 above.
2534 If there are any other similar loopholes, the new check in host_aton()
2535 itself should stop them being exploited. The report I received stated that
2536 data on the command line could provoke the exploit when Exim was running as
2537 exim, but did not say which command line option was involved. All I could
2538 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2539 running as the user.
2542 61. There was a buffer overflow vulnerability in the SPA authentication code
2543 (which came originally from the Samba project). I have added a test to the
2544 spa_base64_to_bits() function which I hope fixes it.
2547 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2548 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2550 63. The daemon start-up calls getloadavg() while still root for those OS that
2551 need the first call to be done as root, but it missed one case: when
2552 deliver_queue_load_max is set with deliver_drop_privilege. This is
2553 necessary for the benefit of the queue runner, because there is no re-exec
2554 when deliver_drop_privilege is set.
2556 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2557 This has been fixed.
2559 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2560 was in use, was not putting the data itself into the right store pool;
2561 consequently, it could be overwritten for a subsequent message in the same
2562 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2565 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2567 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2568 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2569 the function were treating the return as a boolean value, which happened to
2570 work because 0=false and not-0=true, but is not correct code.
2572 68. The host_aton() function was not handling scoped IPv6 addresses (those
2573 with, for example, "%eth0" on the end) correctly.
2575 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2576 negated items (that is, ~something) in unsigned ints. Some compilers
2577 apparently mutter when there is no cast.
2579 70. If an address verification called from an ACL failed, and did not produce a
2580 user-specific message (i.e. there was only a "system" message), nothing was
2581 put in $acl_verify_message. In this situation, it now puts the system
2584 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2585 session; change 4.31/43 added the unwanted input to the log line - except
2586 that it did not do this in the start of session case. It now does.
2588 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2589 This is wrong and can cause the other end to generate a synchronization
2590 error if it is another Exim or anything else that does the synchronization
2591 check. A QUIT command is no longer sent after a timeout.
2593 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2594 during host lookups.
2596 74. The defer_ok option of callout verification was not working if it was used
2597 when verifying addresses in header lines, that is, for this case:
2599 verify = header_sender/callout=defer_ok
2601 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2602 those file descriptors could be used for SMTP connections. If anything
2603 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2604 could be sent to the SMTP client, causing chaos. The daemon now opens
2605 stdin, stdout, and stderr to /dev/null when it puts itself into the
2608 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2609 log by default. The user can override this with suitable Perl magic.
2611 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2612 the log message when discard triggers, was not working for the DATA ACL or
2613 for the non-SMTP ACL.
2615 78. Error message wording change in sieve.c.
2617 79. If smtp_accept_max_per_host was set, the number of connections could be
2618 restricted to fewer than expected, because the daemon was trying to set up
2619 a new connection before checking whether the processes handling previous
2620 connections had finished. The check for completed processes is now done
2621 earlier. On busy systems, this bug wouldn't be noticed because something
2622 else would have woken the daemon, and it would have reaped the completed
2625 80. If a message was submitted locally by a user whose login name contained one
2626 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2627 It caused a spool format error. I have fixed the spool reading code. A
2628 related problem was that the "from" clause in the Received: line became
2629 illegal because of the space(s). It is now covered by ${quote_local_part.
2631 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2634 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2636 83. Patch from Sieve maintainer to fix unterminated string problem in
2637 "vacation" handling.
2639 84. Some minor changes to the Linux configuration files to help with other
2640 OS variants using glibc.
2642 85. One more patch for Sieve to update vacation handling to latest spec.
2645 ----------------------------------------------------
2646 See the note above about the 4.44 and 4.50 releases.
2647 ----------------------------------------------------
2653 1. Change 4.43/35 introduced a bug that caused file counts to be
2654 incorrectly computed when quota_filecount was set in an appendfile
2657 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2658 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2661 3. Give more explanation in the error message when the command for a transport
2662 filter fails to execute.
2664 4. There are several places where Exim runs a non-Exim command in a
2665 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2666 was being done only for the command run by the queryprogram router. It is
2667 now done for all such subprocesses. The other cases are: ${run, transport
2668 filters, and the commands run by the lmtp and pipe transports.
2670 5. Some older OS have a limit of 256 on the maximum number of file
2671 descriptors. Exim was using setrlimit() to set 1000 as a large value
2672 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2673 systems. I've change it so that if it can't get 1000, it tries for 256.
2675 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2676 was an oversight, and furthermore, ever since the addition of extra
2677 controls (e.g. 4.43/32), the checks on when to allow different forms of
2678 "control" were broken. There should now be diagnostics for all cases when a
2679 control that does not make sense is encountered.
2681 7. $recipients is now available in the predata ACL (oversight).
2683 8. Tidy the search cache before the fork to do a delivery from a message
2684 received from the command line. Otherwise the child will trigger a lookup
2685 failure and thereby defer the delivery if it tries to use (for example) a
2686 cached ldap connection that the parent has called unbind on.
2688 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2689 of $address_data from the recipient verification was clobbered by the
2690 sender verification.
2692 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2693 was its contents. (It was OK if the option was not defined at all.)
2695 11. A "Completed" log line is now written for messages that are removed from
2696 the spool by the -Mrm option.
2698 12. $host_address is now set to the target address during the checking of
2699 ignore_target_hosts.
2701 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2702 being passed; this would have caused $sender_host_name to have been used if
2703 matching the list had actually called for a host name (not very likely,
2704 since this list is usually IP addresses). A host name is now passed as
2707 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2708 code that specifies a non-restarting handler (typically sigaction() in
2709 modern systems) in an attempt to fix a rare and obscure crash bug.
2711 15. Narrowed the window for a race in the daemon that could cause it to ignore
2712 SIGCHLD signals. This is not a major problem, because they are used only to
2713 wake it up if nothing else does.
2715 16. A malformed maildirsize file could cause Exim to calculate negative values
2716 for the mailbox size or file count. Odd effects could occur as a result.
2717 The maildirsize information is now recalculated if the size or filecount
2720 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2721 support for a long time. Removed HAVE_SYS_VFS_H.
2723 18. Updated exipick to current release from John Jetmore.
2725 19. Allow an empty sender to be matched against a lookup in an address list.
2726 Previously the only cases considered were a regular expression, or an
2729 20. Exim went into a mad DNS lookup loop when doing a callout where the
2730 host was specified on the transport, if the DNS lookup yielded more than
2733 21. The RFC2047 encoding function was originally intended for short strings
2734 such as real names; it was not keeping to the 75-character limit for
2735 encoded words that the RFC imposes. It now respects the limit, and
2736 generates multiple encoded words if necessary. To be on the safe side, I
2737 have increased the buffer size for the ${rfc2047: expansion operator from
2740 22. Failure to deliver a bounce message always caused it to be frozen, even if
2741 there was an errors_to setting on the router. The errors_to setting is now
2744 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2745 canonical form (fully expanded) before being placed in
2746 $sender_host_address.
2748 24. Updated eximstats to version 1.33
2750 25. Include certificate and key file names in error message when GnuTLS fails
2751 to set them up, because the GnuTLS error message doesn't include the name
2752 of the failing file when there is a problem reading it.
2754 26. Expand error message when OpenSSL has problems setting up cert/key files.
2757 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2758 (this can affect the format of dates).
2760 28. exim_tidydb, when checking for the continued existence of a message for
2761 which it has found a message-specific retry record, was not finding
2762 messages that were in split spool directories. Consequently, it was
2763 deleting retry records that should have stayed in existence.
2765 29. eximstats updated to version 1.35
2766 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2767 1.35 - bugfix such that pie charts by volume are generated correctly
2769 30. The SPA authentication driver was not abandoning authentication and moving
2770 on to the next authenticator when an expansion was forced to fail,
2771 contradicting the general specification for all authenticators. Instead it
2772 was generating a temporary error. It now behaves as specified.
2774 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2775 (the order specifies the preference for clients). The order is now AES256,
2776 AES128, 3DES, ARCFOUR128.
2778 31. Small patch to Sieve code - explicitly set From: when generating an
2781 32. Exim crashed if a remote delivery caused a very long error message to be
2782 recorded - for instance if somebody sent an entire SpamAssassin report back
2783 as a large number of 550 error lines. This bug was coincidentally fixed by
2784 increasing the size of one of Exim's internal buffers (big_buffer) that
2785 happened as part of the Exiscan merge. However, to be on the safe side, I
2786 have made the code more robust (and fixed the comments that describe what
2789 33. Some experimental protocols are using DNS PTR records for new purposes. The
2790 keys for these records are domain names, not reversed IP addresses. The
2791 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2792 leaves it alone. Component reversal etc. now happens only for IP addresses.
2795 34. The host_aton() function is supposed to be passed a string that is known
2796 to be a valid IP address. However, in the case of IPv6 addresses, it was
2797 not checking this. This is a hostage to fortune. Exim now panics and dies
2798 if the condition is not met. A case was found where this could be provoked
2799 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2800 components; fortuitously, this particular loophole had already been fixed
2801 by change 4.50/55 or 4.44/33 above.
2803 If there are any other similar loopholes, the new check in host_aton()
2804 itself should stop them being exploited. The report I received stated that
2805 data on the command line could provoke the exploit when Exim was running as
2806 exim, but did not say which command line option was involved. All I could
2807 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2808 running as the user.
2811 35. There was a buffer overflow vulnerability in the SPA authentication code
2812 (which came originally from the Samba project). I have added a test to the
2813 spa_base64_to_bits() function which I hope fixes it.
2816 36. The daemon start-up calls getloadavg() while still root for those OS that
2817 need the first call to be done as root, but it missed one case: when
2818 deliver_queue_load_max is set with deliver_drop_privilege. This is
2819 necessary for the benefit of the queue runner, because there is no re-exec
2820 when deliver_drop_privilege is set.
2822 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2823 was in use, was not putting the data itself into the right store pool;
2824 consequently, it could be overwritten for a subsequent message in the same
2825 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2828 38. Sometimes the final signoff response after QUIT could fail to get
2829 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2830 < 0 before doing a fflush(). This bug looks as though it goes back to the
2831 introduction of TLS in release 3.20, but "sometimes" must have been rare
2832 because the tests only now provoked it.
2838 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2839 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2840 Now it returns an integer. A number of calls were still expecting a T/F
2841 return. Fortuitously, in all cases, the tests worked in OK situations,
2842 which is the norm. However, things would have gone wrong on any write
2843 failures on the smtp file descriptor. This function is used when sending
2844 messages over SMTP and also when doing verify callouts.
2846 2. When Exim is called to do synchronous delivery of a locally submitted
2847 message (the -odf or -odi options), it no longer closes stderr before doing
2850 3. Implemented the mua_wrapper option.
2852 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2854 5. Implemented the functions header_remove(), header_testname(),
2855 header_add_at_position(), and receive_remove_recipient(), and exported them
2858 6. If an ACL "warn" statement specified the addition of headers, Exim already
2859 inserted X-ACL-Warn: at the start if there was no header name. However, it
2860 was not making this test for the second and subsequent header lines if
2861 there were newlines in the string. This meant that an invalid header could
2862 be inserted if Exim was badly configured.
2864 7. Allow an ACL "warn" statement to add header lines at the start or after all
2865 the Received: headers, as well as at the end.
2867 8. Added the rcpt_4xx retry error code.
2869 9. Added postmaster_mailfrom=xxx to callout verification option.
2871 10. Added mailfrom=xxxx to the callout verification option, for verify=
2874 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2875 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2877 12. Inserted some casts to stop certain compilers warning when using pointer
2878 differences as field lengths or precisions in printf-type calls (mostly
2879 affecting debugging statements).
2881 13. Added optional readline() support for -be (dynamically loaded).
2883 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2884 same clock tick as a message's arrival, so that its received time was the
2885 same as the "first fail" time on the retry record, and that message
2886 remained on the queue past the ultimate address timeout, every queue runner
2887 would try a delivery (because it was past the ultimate address timeout) but
2888 after another failure, the ultimate address timeout, which should have then
2889 bounced the address, did not kick in. This was a "< instead of <=" error;
2890 in most cases the first failure would have been in the next clock tick
2891 after the received time, and all would be well.
2893 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2894 being recognized when the domain list was tested by the match_domain
2895 condition in an expansion string.
2897 16. Added the ${str2b64: operator.
2899 17. Exim was always calling setrlimit() to set a large limit for the number of
2900 processes, without checking whether the existing limit was already
2901 adequate. (It did check for the limit on file descriptors.) Furthermore,
2902 errors from getrlimit() and setrlimit() were being ignored. Now they are
2903 logged to the main and panic logs, but Exim does carry on, to try to do its
2904 job under whatever limits there are.
2906 18. Imported PCRE 5.0.
2908 19. Trivial typo in log message " temporarily refused connection" (the leading
2911 20. If the log selector return_path_on_delivery was set and an address was
2912 redirected to /dev/null, the delivery process crashed because it assumed
2913 that a return path would always be set for a "successful" delivery. In this
2914 case, the whole delivery is bypassed as an optimization, and therefore no
2917 21. Internal re-arrangement: the function for sending a challenge and reading
2918 a response while authentication was assuming a zero-terminated challenge
2919 string. It's now changed to take a pointer and a length, to allow for
2920 binary data in such strings.
2922 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2924 23. Exim was not respecting finduser_retries when seeking the login of the
2925 uid under which it was called; it was always trying 10 times. (The default
2926 setting of finduser_retries is zero.) Also, it was sleeping after the final
2927 failure, which is pointless.
2929 24. Implemented tls_on_connect_ports.
2931 25. Implemented acl_smtp_predata.
2933 26. If the domain in control=submission is set empty, Exim assumes that the
2934 authenticated id is a complete email address when it generates From: or
2935 Sender: header lines.
2937 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2938 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2939 chown and chgrp in /bin and hostname in /usr/bin.
2941 28. Exim was keeping the "process log" file open after each use, just as it
2942 does for the main log. This opens the possibility of it remaining open for
2943 long periods when the USR1 signal hits a daemon. Occasional processlog
2944 errors were reported, that could have been caused by this. Anyway, it seems
2945 much more sensible not to leave this file open at all, so that is what now
2948 29. The long-running daemon process does not normally write to the log once it
2949 has entered its main loop, and it closes the log before doing so. This is
2950 so that log files can straightforwardly be renamed and moved. However,
2951 there are a couple of unusual error situations where the daemon does write
2952 log entries, and I had neglected to close the log afterwards.
2954 30. The text of an SMTP error response that was received during a remote
2955 delivery was being truncated at 512 bytes. This is too short for some of
2956 the long messages that one sometimes sees. I've increased the limit to
2959 31. It is now possible to make retry rules that apply only when a message has a
2960 specific sender, in particular, an empty sender.
2962 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2963 it possible to be selective about when SMTP synchronization is enforced.
2965 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2967 32. Implemented hosts_connection_nolog.
2969 33. Added an ACL for QUIT.
2971 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2974 35. Added mailbox_size and mailbox_filecount to appendfile.
2976 36. Added control = no_multiline_responses to ACLs.
2978 37. There was a bug in the logic of the code that waits for the clock to tick
2979 in the case where the clock went backwards by a substantial amount such
2980 that the microsecond fraction of "now" was more than the microsecond
2981 fraction of "then" (but the whole seconds number was less).
2983 38. Added support for the libradius Radius client library this is found on
2984 FreeBSD (previously only the radiusclient library was supported).
2990 1. When certain lookups returned multiple values in the form name=value, the
2991 quoting of the values was not always being done properly. Specifically:
2992 (a) If the value started with a double quote, but contained no whitespace,
2994 (b) If the value contained whitespace other than a space character (i.e.
2995 tabs or newlines or carriage returns) it was not quoted.
2996 This fix has been applied to the mysql and pgsql lookups by writing a
2997 separate quoting function and calling it from the lookup code. The fix
2998 should probably also be applied to nisplus, ibase and oracle lookups, but
2999 since I cannot test any of those, I have not disturbed their existing code.
3001 2. A hit in the callout cache for a specific address caused a log line with no
3002 reason for rejecting RCPT. Now it says "Previous (cached) callout
3003 verification failure".
3005 3. There was an off-by-one bug in the queryprogram router. An over-long
3006 return line was truncated at 256 instead of 255 characters, thereby
3007 overflowing its buffer with the terminating zero. As well as fixing this, I
3008 have increased the buffer size to 1024 (and made a note to document this).
3010 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3011 when Exim is waiting for an SMTP response from a remote server, Exim
3012 restarts its select() call on the socket, thereby resetting its timeout.
3013 This is not a problem when such interrupts are rare. Somebody set up a cron
3014 job to run exiwhat every 2 minutes, which is less than the normal select()
3015 timeout (5 or 10 minutes). This meant that the select() timeout never
3016 kicked in because it was always reset. I have fixed this by comparing the
3017 time when an interrupt arrives with the time at the start of the first call
3018 to select(). If more time than the timeout has elapsed, the interrupt is
3019 treated as a timeout.
3021 5. Some internal re-factoring in preparation for the addition of Sieve
3022 extensions (by MH). In particular, the "personal" test is moved to a
3023 separate function, and given an option for scanning Cc: and Bcc: (which is
3024 not set for Exim filters).
3026 6. When Exim created an email address using the login of the caller as the
3027 local part (e.g. when creating a From: or Sender: header line), it was not
3028 quoting the local part when it contained special characters such as @.
3030 7. Installed new OpenBSD configuration files.
3032 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3033 try to make them clearer.
3035 9. Callout options, other than the timeout value, were being ignored when
3036 verifying sender addresses in header lines. For example, when using
3038 verify = header_sender/callout=no_cache
3040 the cache was (incorrectly) being used.
3042 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3043 only the Cygwin environment.
3045 11. When return_path_on_delivery was set as a log selector, if different remote
3046 addresses in the same message used different return paths and parallel
3047 remote delivery occurred, the wrong values would sometimes be logged.
3048 (Whenever a remote delivery process finished, the return path value from
3049 the most recently started remote delivery process was logged.)
3051 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3052 lines when AUTH and/or TLS are in use. This is the "received protocol"
3053 field. Exim used to use "asmtp" for authenticated SMTP, without any
3054 indication (in the protocol name) for TLS use. Now it follows the RFC and
3055 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3056 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3057 names appear in log lines as well as in Received: header lines.
3059 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3060 extensions, and comparison tests, and to fix some bugs.
3062 14. Changes to the "personal" filter test:
3064 (1) The test was buggy in that it was just doing the equivalent of
3065 "contains" tests on header lines. For example, if a user's address was
3066 anne@some.where, the "personal" test would incorrectly be true for
3068 To: susanne@some.where
3070 This test is now done by extracting each address from the header in turn,
3071 and checking the entire address. Other tests that are part of "personal"
3072 are now done using regular expressions (for example, to check local parts
3073 of addresses in From: header lines).
3075 (2) The list of non-personal local parts in From: addresses has been
3076 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3077 taken from the Sieve specification recommendations.
3079 (3) If the message contains any header line starting with "List-" it is
3080 treated as non-personal.
3082 (4) The test for "circular" in the Subject: header line has been removed
3083 because it now seems ill-conceived.
3085 15. Minor typos in src/EDITME comments corrected.
3087 16. Installed latest exipick from John Jetmore.
3089 17. If headers_add on a router specified a text string that was too long for
3090 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3091 of string_sprintf() is now avoided.
3093 18. $message_body_size was not set (it was always zero) when running the DATA
3094 ACL and the local_scan() function.
3096 19. For the "mail" command in an Exim filter, no default was being set for
3097 the once_repeat time, causing a random time value to be used if "once" was
3098 specified. (If the value happened to be <= 0, no repeat happened.) The
3099 default is now 0s, meaning "never repeat". The "vacation" command was OK
3100 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3101 (I found it when inspecting the code).
3103 20. There is now an overall timeout for performing a callout verification. It
3104 defaults to 4 times the callout timeout, which applies to individual SMTP
3105 commands during the callout. The overall timeout applies when there is more
3106 than one host that can be tried. The timeout is checked before trying the
3107 next host. This prevents very long delays if there are a large number of
3108 hosts and all are timing out (e.g. when the network connections are timing
3109 out). The value of the overall timeout can be changed by specifying an
3110 additional sub-option for "callout", called "maxwait". For example:
3112 verify = sender/callout=5s,maxwait=20s
3114 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3115 to the end before writing, but this should make it even safer).
3117 22. Exim was forgetting that it had advertised PIPELINING for the second and
3118 subsequent messages on an SMTP connection. It was also not resetting its
3119 memory on STARTTLS and an internal HELO.
3121 23. When Exim logs an SMTP synchronization error within a session, it now
3122 records whether PIPELINING has been advertised or not.
3124 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3125 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3126 rather than long int.
3128 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3130 26. Added the never_mail option to autoreply.
3136 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3137 crash if the getsockname() call failed; this can happen if a connection is
3138 closed very soon after it is established. The problem was simply in the
3139 order in which certain operations were done, causing Exim to try to write
3140 to the SMTP stream before it had set up the file descriptor. The bug has
3141 been fixed by making things happen in the correct order.
3147 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3148 before the connection was closed, thus losing the rejection response.
3150 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3151 some early Solaris releases, but causes trouble in current releases where
3152 socklen_t is defined.
3154 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3157 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3160 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3161 that releasing the top of it at the end releases what was used for sub-
3162 expansions (unless the block got too big). However, discard this block if
3163 the first thing is a variable or header, so that we can use its block when
3164 it is dynamic (useful for very large $message_headers, for example).
3166 6. Lookups now cache *every* query, not just the most recent. A new, separate
3167 store pool is used for this. It can be recovered when all lookup caches are
3168 flushed. Lookups now release memory at the end of their result strings.
3169 This has involved some general refactoring of the lookup sources.
3171 7. Some code has been added to the store_xxx() functions to reduce the amount
3172 of flapping under certain conditions.
3174 8. log_incoming_interface used to affect only the <= reception log lines. Now
3175 it causes the local interface and port to be added to several more SMTP log
3176 lines, for example "SMTP connection from", and rejection lines.
3178 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3180 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3182 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3183 could be overwritten at the end of the current message (or the start of a
3184 new message if it was set in a HELO ACL). The value is now preserved for
3185 the duration of the SMTP connection.
3187 12. If a transport had a headers_rewrite setting, and a matching header line
3188 contained an unqualified address, that address was qualified, even if it
3189 did not match any rewriting rules. The underlying bug was that the values
3190 of the flags that permit the existence of unqualified sender and recipient
3191 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3192 non-local messages, and by -bnq for local messages) were not being
3193 preserved with the message after it was received.
3195 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3196 "next input=" as part of the text comprising the host identity instead of
3197 the correct text. The code was using the same buffer for two different
3198 strings. However, depending on which order the printing function evaluated
3199 its arguments, the bug did not always show up. Under Linux, for example, my
3200 test suite worked just fine.
3202 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3203 doesn't work with some older versions of Perl. It has been changed to "my",
3204 which in any case is probably the better facility to use.
3206 15. A really picky compiler found some instances of statements for creating
3207 error messages that either had too many or two few arguments for the format
3210 16. The size of the buffer for calls to the DNS resolver has been increased
3211 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3212 for addresses that have a lot of PTR records. This alleviates a problem; it
3213 does not fully solve it.
3215 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3216 buffer now truncates the list and logs the incident, which is the same
3217 action as happens when Exim is looking up a host name and its aliases.
3218 Previously in this situation something unpredictable would happen;
3219 sometimes it was "internal error: store_reset failed".
3221 18. If a server dropped the connection unexpectedly when an Exim client was
3222 using GnuTLS and trying to read a response, the client delivery process
3223 crashed while trying to generate an error log message.
3225 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3226 string, for example:
3228 warn message = H1: something\nH2: something
3230 the text was added as a single header line from Exim's point of view
3231 though it ended up OK in the delivered message. However, searching for the
3232 second and subsequent header lines using $h_h2: did not work. This has been
3233 fixed. Similarly, if a system filter added multiple headers in this way,
3234 the routers could not see them.
3236 20. Expanded the error message when iplsearch is called with an invalid key to
3237 suggest using net-iplsearch in a host list.
3239 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3240 ACLs are no longer actually imposed (and a message to that effect is
3243 22. If a "gecos" field in a passwd entry contained escaped characters, in
3244 particular, if it contained a \" sequence, Exim got it wrong when building
3245 a From: or a Sender: header from that name. A second bug also caused
3246 incorrect handling when an unquoted " was present following a character
3247 that needed quoting.
3249 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3250 was not being matched caselessly.
3252 24. Arranged for all hyphens in the exim.8 source to be escaped with
3255 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3256 properly. Recipient callout cache records were still being keyed to include
3257 the sender, even when use_sender was set false. This led to far more
3258 callouts that were necessary. The sender is no longer included in the key
3259 when use_sender is false.
3261 26. Added "control = submission" modifier to ACLs.
3263 27. Added the ${base62d: operator to decode base 62 numbers.
3265 28. dnsdb lookups can now access SRV records.
3267 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3268 the configuration file.
3270 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3271 (-v) mode. This makes the output for a verbose queue run more intelligible.
3273 31. Added a use_postmaster feature to recipient callouts.
3275 32. Added the $body_zerocount variable, containing the number of binary zero
3276 bytes in the message body.
3278 33. The time of last modification of the "new" subdirectory is now used as the
3279 "mailbox time last read" when there is a quota error for a maildir
3282 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3284 35. Added +ignore_unknown as a special item in host lists.
3286 36. Code for decoding IPv6 addresses in host lists is now included, even if
3287 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3288 address was recognized as an IP address, but was then not correctly decoded
3289 into binary, causing unexpected and incorrect effects when compared with
3296 1. Very minor rewording of debugging text in manualroute to say "list of
3297 hosts" instead of "hostlist".
3299 2. If verify=header_syntax was set, and a header line with an unqualified
3300 address (no domain) and a large number of spaces between the end of the
3301 name and the colon was received, the reception process suffered a buffer
3302 overflow, and (when I tested it) crashed. This was caused by some obsolete
3303 code that should have been removed. The fix is to remove it!
3305 3. When running in the test harness, delay a bit after writing a bounce
3306 message to get a bit more predictability in the log output.
3308 4. Added a call to search_tidyup() just before forking a reception process. In
3309 theory, someone could use a lookup in the expansion of smtp_accept_max_
3310 per_host which, without the tidyup, could leave open a database connection.
3312 5. Added the variables $recipient_data and $sender_data which get set from a
3313 lookup success in an ACL "recipients" or "senders" condition, or a router
3314 "senders" option, similar to $domain_data and $local_part_data.
3316 6. Moved the writing of debug_print from before to after the "senders" test
3319 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3320 problems for message scanning, either using a data ACL, or using
3321 local_scan() because the Received: header was not generated till after they
3322 were called (in order to set the time as the time of reception completion).
3323 I have revised the way this works. The header is now generated after the
3324 body is received, but before the ACL or local_scan() are called. After they
3325 are run, the timestamp in the header is updated.
3331 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3332 before starting a queue runner without re-exec. This happened only when
3333 deliver_drop_privilege was set or when the Exim user was set to root. The
3334 effect of the bug was that timeouts during subsequent deliveries caused
3335 crashes instead of being properly handled. The handler is now left at its
3336 default (and expected) setting.
3338 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3339 message, again when deliver_drop_privilege is set or Exim is run as root.
3340 The bug described in (1) was not present in this case, but the tidying up
3341 of the other signals was missing. I have made the two cases consistent.
3343 3. The ignore_target_hosts setting on a manualroute router was being ignored
3344 for hosts that were looked up using the /MX notation.
3346 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3349 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3350 operated on the sender address. After changing the $sender_address to <>
3351 for the sender address verify, Exim was re-instated it as the original
3352 (before rewriting) address, but remembering that it had rewritten it, so it
3353 wasn't rewriting it again. This bug also had the effect of breaking the
3354 sender address verification caching when the sender address was rewritten.
3356 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3357 This has been changed so that if the ip literal address matches
3358 ignore_target_hosts, the router declines.
3360 7. Added expansion conditions match_domain, match_address, and match_local_
3361 part (NOT match_host).
3363 8. The placeholder for the Received: header didn't have a length field set.
3365 9. Added code to Exim itself and to exim_lock to test for a specific race
3366 condition that could lead to file corruption when using MBX delivery. The
3367 issue is with the lockfile that is created in /tmp. If this file is removed
3368 after a process has opened it but before that process has acquired a lock,
3369 there is the potential for a second process to recreate the file and also
3370 acquire a lock. This could lead to two Exim processes writing to the file
3371 at the same time. The added code performs the same test as UW imapd; it
3372 checks after acquiring the lock that its file descriptor still refers to
3373 the same named file.
3375 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3376 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3379 11. Added the smtp_active_hostname option. If used, this will typically be made
3380 to depend on the incoming interface address. Because $interface_address is
3381 not set up until the daemon has forked a reception process, error responses
3382 that can happen earlier (such as "too many connections") no longer contain
3385 12. If an expansion in a condition on a "warn" statement fails because a lookup
3386 defers, the "warn" statement is abandoned, and the next ACL statement is
3387 processed. Previously this caused the whole ACL to be aborted.
3389 13. Added the iplsearch lookup type.
3391 14. Added ident_timeout as a log selector.
3393 15. Added tls_certificate_verified as a log selector.
3395 16. Added a global option tls_require_ciphers (compare the smtp transport
3396 option of the same name). This controls incoming TLS connections.
3398 17. I finally figured out how to make tls_require_ciphers do a similar thing
3399 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3400 before starting the TLS session.
3402 18. Tabs are now shown as \t in -bP output.
3404 19. If the log selector return_path_on_delivery was set, Exim crashed when
3405 bouncing a message because it had too many Received: header lines.
3407 20. If two routers both had headers_remove settings, and the first one included
3408 a superfluous trailing colon, the final name in the first list and the
3409 first name in the second list were incorrectly joined into one item (with a
3410 colon in the middle).
3416 1. Added -C and -D options to the exinext utility, mainly to make it easier
3417 to include in the automated testing, but these could be helpful when
3418 multiple configurations are in use.
3420 2. The exinext utility was not formatting the output nicely when there was
3421 an alternate port involved in the retry record key, nor when there was a
3422 message id as well (for retries that were specific to a specific message
3423 and a specific host). It was also confused by IPv6 addresses, because of
3424 the additional colons they contain. I have fixed the IPv4 problem, and
3425 patched it up to do a reasonable job for IPv6.
3427 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3428 delivery, the log line now contains "pipelined" if PIPELINING was used.
3430 4. An SMTP transport process used to panic and die if the bind() call to set
3431 an explicit outgoing interface failed. This has been changed; it is now
3432 treated in the same way as a connect() failure.
3434 5. A reference to $sender_host_name in the part of a conditional expansion
3435 that was being skipped was still causing a DNS lookup. This no longer
3438 6. The def: expansion condition was not recognizing references to header lines
3439 that used bh_ and bheader_.
3441 7. Added the _cache feature to named lists.
3443 8. The code for checking quota_filecount in the appendfile transport was
3444 allowing one more file than it should have been.
3446 9. For compatibility with Sendmail, the command line option
3454 and sets the incoming protocol and host name (for trusted callers). The
3455 host name and its colon can be omitted when only the protocol is to be set.
3456 Note the Exim already has two private options, -pd and -ps, that refer to
3457 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3458 "s", but I don't think that's a major issue.
3460 10. A number of refactoring changes to the code, none of which should affect
3463 (a) The number of logging options was getting close to filling up the
3464 32-bit word that was used as a bit map. I have split them into two classes:
3465 those that are passed in the argument to log_write(), and those that are
3466 only ever tested independently outside of that function. These are now in
3467 separate 32-bit words, so there is plenty of room for expansion again.
3468 There is no change in the user interface or the logging behaviour.
3470 (b) When building, for example, log lines, the code previously used a
3471 macro that called string_cat() twice, in order to add two strings. This is
3472 not really sufficiently general. Furthermore, there was one instance where
3473 it was actually wrong because one of the argument was used twice, and in
3474 one call a function was used. (As it happened, calling the function twice
3475 did not affect the overall behaviour.) The macro has been replaced by a
3476 function that can join an arbitrary number of extra strings onto a growing
3479 (c) The code for expansion conditions now uses a table and a binary chop
3480 instead of a serial search (which was left over from when there were very
3481 few conditions). Also, it now recognizes conditions like "pam" even when
3482 the relevant support is not compiled in: a suitably worded error message is
3483 given if an attempt is made to use such a condition.
3485 11. Added ${time_interval:xxxxx}.
3487 12. A bug was causing one of the ddress fields not to be passed back correctly
3488 from remote delivery subprocesses. The field in question was not being
3489 subsequently used, so this caused to problems in practice.
3491 13. Added new log selectors queue_time and deliver_time.
3493 14. Might have fixed a bug in maildirsizefile handling that threw up
3494 "unexpected character" debug warnings, and recalculated the data
3495 unnecessarily. In any case, I expanded the warning message to give more
3498 15. Added the message "Restricted characters in address" to the statements in
3499 the default ACL that block characters like @ and % in local parts.
3501 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3502 Three changes have been made:
3504 (a) There was a serious bug; a negative response to MAIL caused the whole
3505 recipient domain to be cached as invalid, thereby blocking all messages
3506 to all local parts at the same domain, from all senders. This bug has
3507 been fixed. The domain is no longer cached after a negative response to
3508 MAIL if the sender used is not empty.
3510 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3513 (c) A new callout option, "use_sender" has been added for people who want
3514 the modified behaviour.
3520 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3523 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3524 indeed breaks things for older releases.
3526 3. Added additional logging to the case where there is a problem reading data
3527 from a filter that is running in a subprocess using a pipe, in order to
3528 try to track down a specific problem.
3530 4. Testing facility fudge: when running in the test harness and attempting
3531 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3532 getting "No route to host". Convert this to a timeout.
3534 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3537 6. Some OS don't have socklen_t but use size_t instead. This affects the
3538 fifth argument of getsockopt() amongst other things. This is now
3539 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3540 can be set for individual OS. I have set it for SunOS5, OSF1, and
3541 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3542 some earlier ones do not.
3544 7. Change 4.30/15 was not doing the test caselessly.
3546 8. The standard form for an IPv6 address literal was being rejected by address
3547 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3548 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3549 this, as well as the form without the "IPv6" on the front (but only when
3550 address literals are enabled, of course).
3552 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3554 10. Exim crashed if a message with an empty sender address specified by -f
3555 encountered a router with an errors_to setting. This could be provoked only
3556 by a command such as
3560 where an empty string was supplied; "<>" did not hit this bug.
3562 11. Installed PCRE release 4.5.
3564 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3565 remained set. It is now erased.
3567 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3568 times from message ids (which are base 36 rather than the normal 62).
3570 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3571 were being counted as actual protocol errors, and logged if the log
3572 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3573 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3574 and DATA following a set of rejected RCPTs do not count as protocol errors.
3575 In other words, Exim assumes they were pipelined, though this may not
3576 actually be the case. Of course, in all cases the client gets an
3577 appropriate error code.
3579 15. If a lookup fails in an ACL condition, a message about the failure may
3580 be available; it is used if testing the ACL cannot continue, because most
3581 such messages specify what the cause of the deferral is. However, some
3582 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3583 that caused an old message to be retained and used if a later statement
3584 caused a defer, replacing the real cause of the deferral.
3586 16. If an IP address had so many PTR records that the DNS lookup buffer
3587 was not large enough to hold them, Exim could crash while trying to process
3588 the truncated data. It now detects and logs this case.
3590 17. Further to 4.21/58, another change has been made: if (and only if) the
3591 first line of a message (the first header line) ends with CRLF, a bare LF
3592 in a subsequent header line has a space inserted after it, so as not to
3593 terminate the header.
3595 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3596 unnecessarily, used atoi() instead of strtol(), and didn't check the
3597 termination when getting file sizes from file names by regex.
3599 19. Completely re-implemented the support for maildirsize files, in the light
3600 of a number of problems with the previous contributed implementation
3601 (4.30/29). In particular:
3603 . If the quota is zero, the maildirsize file is maintained, but no quota is
3606 . If the maildir directory does not exist, it is created before any attempt
3607 to write a maildirsize file.
3609 . The quota value in the file is just a cache; if the quota is changed in
3610 the transport, the new value overrides.
3612 . A regular expression is available for excluding directories from the
3615 20. The autoreply transport checks the characters in options that define the
3616 message's headers; it allows continued headers, but it was checking with
3617 isspace() after an embedded newline instead of explicitly looking for a
3620 21. If all the "regular" hosts to which an address was routed had passed their
3621 expiry times, and had not reached their retry times, the address was
3622 bounced, even if fallback hosts were defined. Now Exim should go on to try
3625 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3626 equivalent code in the SMTP transport. Some hosts send humungous responses
3627 to HELO/EHLO, more than 1024 it seems.
3629 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3630 gives compiler warnings in some environments. I've now done it "properly",
3633 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3634 (because of problems with the built-in one) was declared to return uschar *
3635 instead of char *, causing compiler failure.
3637 25. Fixed a file descriptor leak when processing alias/forward files.
3639 26. Fixed a minor format string issue in dbfn.c.
3641 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3643 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3644 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3647 29. When a sender address is verified, it is cached, to save repeating the test
3648 when there is more than one recipient in a message. However, when the
3649 verification involves a callout, it is possible for different callout
3650 options to be set for different recipients. It is too complicated to keep
3651 track of this in the cache, so now Exim always runs a verification when a
3652 callout is required, relying on the callout cache for the optimization.
3653 The overhead is duplication of the address routing, but this should not be
3656 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3657 to be verified with callout=postmaster, and the main callout worked but the
3658 postmaster check failed, the verification correctly failed. However, if a
3659 subsequent RCPT command asked for sender verification *without* the
3660 postmaster check, incorrect caching caused this verification also to fail,
3663 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3664 it was not caching the DNS options (qualify_single, search_parents) that
3665 were used when the lookup failed. A subsequent lookup with different
3666 options therefore always gave the same answer, though there were cases
3667 where it should not have. (Example: a "domains = !$mx_any" option on a
3668 dnslookup router: the "domains" option is always processed without any
3669 widening, but the router might have qualify_single set.) Now Exim uses the
3670 cached value only when the same options are set.
3672 32. Added John Jetmore's "exipick" utility to the distribution.
3674 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3675 than a timeout (e.g. a certificate is required, and is not provided), an
3676 Exim server now closes the connection immediately. Previously it waited for
3677 the client to close - but if the client is SSL, it seems that they each
3678 wait for each other, leading to a delay before one of them times out.
3680 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3681 maintained 0.8.x compatibility because I don't think many are using it, and
3682 it is clearly obsolete.
3684 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3687 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3688 client certificate was expired. A simple patch fixes this, though I don't
3689 understand the full logic of why the verify callback is called multiple
3692 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3693 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3694 which causes problems with some clients (such as the Certicom SSL Plus
3695 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3696 disables the coutermeasure allowing Eudora to connect."
3698 38. Exim was not checking that a write() to a log file succeeded. This could
3699 lead to Bad Things if a log got too big, in particular if it hit a file
3700 size limit. Exim now panics and dies if it cannot write to a log file, just
3701 as it does if it cannot open a log file.
3703 39. Modified OS/Makefile-Linux so that it now contains
3705 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3707 The two -D definitions ensure that Exim is compiled with large file
3708 support, which makes it possible to handle log files that are bigger than
3711 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3712 instance) a domain was checked against a named list that involved a lookup,
3713 causing $domain_data to be set, then another domain was checked against the
3714 same list, then the first domain was re-checked, the value of $domain_data
3715 after the final check could be wrong. In particular, if the second check
3716 failed, it could be set empty. This bug probably also applied to
3719 41. The strip_trailing_dot option was not being applied to the address given
3720 with the -f command-line option.
3722 42. The code for reading a message's header from the spool was incrementing
3723 $received_count, but never initializing it. This meant that the value was
3724 incorrect (doubled) while delivering a message in the same process in which
3725 it was received. In the most common configuration of Exim, this never
3726 happens - a fresh exec is done - but it can happen when
3727 deliver_drop_privilege is set.
3729 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3730 it now includes up to 150 characters of the unexpected data in the log
3733 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3734 and building data strings. The size of both of these buffers was 10 000
3735 bytes - far larger than anybody would *ever* want, thought I. Needless to
3736 say, somebody hit the limit. I have increased the maximum line length to
3737 20 000 and the maximum data length of concatenated lines to 100 000. I have
3738 also fixed two bugs, because there was no checking on these buffers. Tsk,
3739 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3740 buffer is too small.
3742 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3743 lsearch lookups. Now it does.
3745 46. When parsing a route_list item in a manualroute router, a fixed-length
3746 buffer was used for the list of hosts. I made this 1024 bytes long,
3747 thinking that nobody would ever have a list of hosts that long. Wrong.
3748 Somebody had a whole pile of complicated expansion conditions, and the
3749 string was silently truncated, leading to an expansion error. It turns out
3750 that it is easier to change to an unlimited length (owing to other changes
3751 that have happened since this code was originally written) than to build
3752 structure for giving a limitation error. The length of the item that
3753 expands into the list of hosts is now unlimited.
3755 47. The lsearch lookup could not handle data where the length of text line was
3756 more than 4095 characters. Such lines were truncated, leading to shortened
3757 data being returned. It should now handle lines of any length.
3759 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3760 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3763 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3764 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3765 no longer happens in comment lines. A list of replacements is now placed
3766 at the head of all of the source files, except those whose only change is
3767 to replace PERL_COMMAND in the very first #! line.
3769 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3770 messages on the queue, with a bottom-up merge sort, using code contributed
3771 by Michael Haardt. This should make operations like -bp somewhat faster on
3772 large queues. It won't affect queue runners, except when queue_run_in_order
3775 51. Installed eximstats 1.31 in the distribution.
3777 52. Added support for SRV lookups to the dnslookup router.
3779 53. If an ACL referred to $message_body or $message_body_end, the value was not
3780 reset for any messages that followed in the same SMTP session.
3782 54. The store-handling optimization for building very long strings was not
3783 differentiating between the different store pools. I don't think this
3784 actually made any difference in practice, but I've tidied it.
3786 55. While running the routers to verify a sender address, $sender_address
3787 was still set to the sender address. This is wrong, because when routing to
3788 send a bounce to the sender, it would be empty. Therefore, I have changed
3789 it so that, while verifying a sender address, $sender_address is set to <>.
3790 (There is no change to what happens when verifying a recipient address.)
3792 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3793 target A or AAAA records (if not already returned) without resetting the
3794 qualify_single or search_parents options of the DNS resolver. These are
3795 inappropriate in this case because the targets of MX and SRV records must
3796 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3797 target that, when qualified, matched something in the local domain. These
3798 two options are now turned off when doing these lookups.
3800 57. It seems that at least some releases of Reiserfs (which does not have the
3801 concept of a fixed number of inodes) returns zero and not -1 for the
3802 number of available inodes. This interacted badly with check_spool_inodes,
3803 which assumed that -1 was the "no such thing" setting. What I have done is
3804 to check that the total number of inodes is greater than zero before doing
3805 the test of how many are available.
3807 58. When a "warn" ACL statement has a log_message modifier, the message is
3808 remembered, and not repeated. This is to avoid a lot of repetition when a
3809 message has many recipients that cause the same warning to be written.
3810 Howewer, Exim was preserving the list of already written lines for an
3811 entire SMTP session, which doesn't seem right. The memory is now reset if a
3812 new message is started.
3814 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3815 debugging output unless log_rewrite was also set.
3817 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3818 of (int)(handle) when we know that handle contains (void *)(-1).
3820 61. The Exim daemon panic-logs an error return when it closes the incoming
3821 connection. However "connection reset by peer" seems to be common, and
3822 isn't really an error worthy of noting specially, so that particular error
3825 62. When Exim is trying to find all the local interfaces, it used to panic and
3826 die if the ioctl to get the interface flags failed. However, it seems that
3827 on at least one OS (Solaris 9) it is possible to have an interface that is
3828 included in the list of interfaces, but for which you get a failure error
3829 for this call. This happens when the interface is not "plumbed" into a
3830 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3831 failure of the "get flags" call assumes that the interface is down.
3833 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3834 makes life easier for people who are doing arithmetic on fields extracted
3835 from dates, where you often get leading zeros that should not be
3836 interpreted as octal.
3838 64. Added qualify_domain to the redirect router, to override the global
3841 65. If a pathologically long header line contained very many addresses (the
3842 report of this problem mentioned 10 000) and each of them was rewritten,
3843 Exim could use up a very large amount of memory. (It kept on making new
3844 copies of the header line as it rewrote, and never released the old ones.)
3845 At the expense of a bit more processing, the header rewriting function has
3846 been changed so that it no longer eats memory in this way.
3848 66. The generation of the Received: header has been moved from the time that a
3849 message starts to be received, to the time that it finishes. The timestamp
3850 in the Received: header should now be very close to that of the <= log
3851 line. There are two side-effects of this change:
3853 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3854 logged header lines no longer include the local Received: line, because
3855 it has not yet been created. The same applies to a copy of the message
3856 that is returned to a non-SMTP sender when a message is rejected.
3858 (b) When a filter file is tested using -bf, no additional Received: header
3859 is added to the test message. After some thought, I decided that this
3862 This change does not affect the value of $received_for. It is still set
3863 after address rewriting, but before local_scan() is called.
3865 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3867 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3868 gave an unhelpful panic error message, and a defer error. I have managed to
3869 change this behaviour so that it now rejects any supplied certificate,
3870 which seems right, as the list of acceptable certificates is empty.
3872 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3873 gave an unhelpful defer error. I have not managed to make this reject any
3874 supplied certificates, but the error message it gives is "no certificate
3875 supplied", which is not helpful.
3877 70. exigrep's output now also includes lines that are not associated with any
3878 message, but which match the given pattern. Implemented by a patch from
3879 Martin Sluka, which also tidied up the Perl a bit.
3881 71. Recipient callout verification, like sender verification, was using <> in
3882 the MAIL FROM command. This isn't really the right thing, since the actual
3883 sender may affect whether the remote host accepts the recipient or not. I
3884 have changed it to use the actual sender in the callout; this means that
3885 the cache record is now keyed on a recipient/sender pair, not just the
3886 recipient address. There doesn't seem to be a real danger of callout loops,
3887 since a callout by the remote host to check the sender would use <>.
3888 [SEE ABOVE: changed after hitting problems.]
3890 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3891 temporary errors. However, in the case of such a code being given after
3892 the end of a data transmission (i.e. after ".") Exim was failing to write
3893 a retry record for the message. (Yes, there was some broken host that was
3894 actually sending 8xx at this point.)
3896 73. An unknown lookup type in a host list could cause Exim to panic-die when
3897 the list was checked. (An example that provoked this was putting <; in the
3898 middle of a list instead of at the start.) If this happened during a DATA
3899 ACL check, a -D file could be left lying around. This kind of configuration
3900 error no longer causes Exim to die; instead it causes a defer errror. The
3901 incident is still logged to the main and panic logs.
3903 74. Buglet left over from Exim 3 conversion. The message "too many messages
3904 in one connection" was written to the rejectlog but not the mainlog, except
3905 when address rewriting (yes!) was being logged.
3907 75. Added write_rejectlog option.
3909 76. When a system filter was run not as root (that is, when system_filter_user
3910 was set), the values of the $n variables were not being returned to the
3911 main process; thus, they were not subsequently available in the $sn
3914 77. Added +return_path_on_delivery log selector.
3916 78. A connection timeout was being treated differently from recipients deferred
3917 when testing hosts_max_try with a message that was older than the host's
3918 retry timeout. (The host should not be counted, thus allowing all hosts to
3919 be tried at least once before bouncing.) This may have been the cause of an
3920 occasionally reported bug whereby a message would remain on the queue
3921 longer than the retry timeout, but would be bounced if a delivery was
3922 forced. I say "may" because I never totally pinned down the problem;
3923 setting up timeout/retry tests is difficult. See also the next item.
3925 79. The ultimate address timeout was not being applied to errors that involved
3926 a combination of host plus message (for example, a timeout on a MAIL
3927 command). When an address resolved to a number of possible hosts, and they
3928 were not all tried for each delivery (e.g. because of hosts_max_try), a
3929 message could remain on the queue longer than the retry timeout.
3931 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3934 81. Fixed an obscure SMTP outgoing bug which required at least the following
3935 conditions: (a) there was another message waiting for the same server;
3936 (b) the server returned 5xx to all RCPT commands in the first message so
3937 that the message was not completed; (c) the server dropped the connection
3938 or gave a negative response to the RSET that Exim sends to abort the
3939 transaction. The observed case was a dropped connection after DATA that had
3940 been sent in pipelining mode. That is, the server had advertised PIPELINING
3941 but was not implementing it correctly. The effect of the bug was incorrect
3942 behaviour, such as trying another host, and this could lead to a crash.
3948 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3949 and daemon.c were passed as pointers to ints; they should have been
3950 pointers to socklen_t variables (which are typically unsigned ints).
3952 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3955 3. Fixed a really odd bug that affected only the testing scheme; patching a
3956 certain fixed string in the binary changed the value of another string that
3957 happened to be identical to the end of the original first string.
3959 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3960 name", it returns that address as the IP address. On some operating
3961 systems (e.g. Solaris), it also passes back the IP address string as the
3962 "host name". However, on others (e.g. Linux), it passes back an empty
3963 string. Exim wasn't checking for this, and was changing the host name to an
3964 empty string, assuming it had been canonicized.
3966 5. Although rare, it is permitted to have more than one PTR record for a given
3967 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3968 all the names associated with an address, because they do in Solaris.
3969 However, it seems that they do not in Linux for data that comes from the
3970 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3971 I found this out when I moved to a new Linux workstation and tried to run
3972 the Exim test suite.
3974 To get round this problem I have changed the code so that it now does its
3975 own call to the DNS to look up PTR records when searching for a host name.
3976 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3977 addresses that are only in /etc/hosts are still found.
3979 This behaviour is, however, controlled by an option called host_lookup_
3980 order, which defaults to "bydns:byaddr". If people want to use the other
3981 order, or indeed, just use one or the other means of lookup, they can
3982 specify it in this variable.
3984 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3985 some operating systems, this comes back from gethostbyaddr() as an empty
3986 string, and this is what Exim used to test for. However, it seems that in
3987 other systems, "." is yielded. Exim now tests for this case too.
3989 7. The values of check_spool_space and check_log_space are now held internally
3990 as a number of kilobytes instead of an absolute number of bytes. If a
3991 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3992 kilobyte. This means that much larger values can be stored.
3994 8. Exim monitor: an attempt to get the action menu when not actually pointing
3995 at a message produces an empty menu entitled "No message selected". This
3996 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3997 no entries in it ("Shell widget menu has zero width and/or height"). So I
3998 have added a single, blank menu entry in this case.
4000 9. Added ${quote_local_part.
4002 10. MIME decoding is now applied to the contents of Subject: header lines when
4005 11. Now that a reference to $sender_host_address automatically causes a reverse
4006 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4007 host lookup before query-style lookups in lists that might use this
4008 variable. This has therefore been abolished, and the "net-" prefix is no
4009 longer necessary for query-style lookups.
4011 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4012 have been a typo for LFLAGS, so it has been changed.
4014 13. The install script calls Exim with "-C /dev/null" in order to find the
4015 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4016 to be output. Howeve, since Exim outputs its version number before the
4017 error, it didn't break the script. It just looked ugly. I fixed this by
4018 always allowing "-C /dev/null" if the caller is root.
4020 14. Ignore overlarge ACL variable number when reading spool file - insurance
4021 against a later release with more variables having written the file.
4023 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4024 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4025 this, as well as the form without the "IPv6" on the front.
4027 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4028 OS/Makefile-Darwin file.
4030 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4031 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4033 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4034 variable. However, some OS use ints for inodes. I've added cast to long int
4035 to get rid of the compiler warning.
4037 19. I had forgotten to lock out "/../" in configuration file names when
4038 ALT_CONFIG_PREFIX was set.
4040 20. Routers used for verification do not need to specify transports. However,
4041 if such a router generated a host list, and callout was configured, Exim
4042 crashed, because it could not find a port number from the (non-existent)
4043 transport. It now assumes port 25 in this circumstance.
4045 21. Added the -t option to exigrep.
4047 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4048 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4049 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4050 them is set, LOOKUP_LSEARCH is forced.
4052 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4054 24. Added sender and host information to the "rejected by local_scan()" log
4055 line; previously there was no indication of these.
4057 25. Added .include_if_exists.
4059 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4060 Linux. It turns out that not all file systems support this. Apparently some
4061 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4062 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4063 not supported on the file descriptor, is now ignored when Exim is trying to
4064 sync a directory. This applies only to Linux.
4066 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4068 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4069 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4072 29. Added support for maildirsize files from supplied patch (modified a bit).
4074 30. The use of :fail: followed by an empty string could lead Exim to respond to
4075 sender verification failures with (e.g.):
4077 550 Verification failed for <xxx>
4078 550 Sender verify failed
4080 where the first response line was missing the '-' that indicates it is not
4081 the final line of the response.
4083 31. The loop for finding the name of the user that called Exim had a hardwired
4084 limit of 10; it now uses the value of finduser_retries, which is used for
4085 all other user lookups.
4087 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4090 33. Exim was neglecting to zero errno before one call of strtol() when
4091 expanding a string and expecting an integer value. On some systems this
4092 resulted in spurious "integer overflow" errors. Also, it was casting the
4093 result into an int without checking.
4095 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4096 did not work. The code looks as if it has *never* worked, though it appears
4097 to have been documented since at least releast 1.62. I have made it work.
4099 35. The "timeout_DNS" error in retry rules, also documented since at least
4100 1.62, also never worked. As it isn't clear exactly what this means, and
4101 clearly it isn't a major issue, I have abolished the feature by treating it
4102 as "timeout", and writing a warning to the main and panic logs.
4104 36. The display of retry rules for -brt wasn't always showing the error code
4107 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4108 timeout_connect_A, timeout_connect_MX.
4110 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4111 to the empty sender.
4113 39. The daemon was not analysing the content of -oX till after it had closed
4114 stderr and disconnected from the controlling terminal. This meant that any
4115 syntax errors were only noted on the panic log, and the return code from
4116 the command was 0. By re-arranging the code a little, I've made the
4117 decoding happen first, so such errors now appear on stderr, and the return
4118 code is 1. However, the actual setting up of the sockets still happens in
4119 the disconnected process, so errors there are still only recorded on the
4122 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4123 connections (as happens on some IP stacks) was logged at start up time as
4124 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4125 it from "IPv6 and IPv4", which means that two separate sockets are being
4128 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4129 says whether AF_INET or AF_INET6 was passed as an argument.
4131 42. Exiwhat output was messed up when time zones were included in log
4134 43. Exiwhat now gives more information about the daemon's listening ports,
4135 and whether -tls-on-connect was used.
4137 44. The "port" option of the smtp transport is now expanded.
4139 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4140 silently ignored. Now an error message is written to the main and panic
4143 46. There's a new ACL modifier called "logwrite" which writes to a log file
4144 as soon as it is encountered.
4146 47. Added $local_user_uid and $local_user_gid at routing time.
4148 48. Exim crashed when trying to verify a sender address that was being
4151 49. Exim was recognizing only a space character after ".include". It now also
4152 recognizes a tab character.
4154 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4155 extracting the relevant information from the specification. The man page no
4156 longer contains scrambled data for the -d option, and I've added a section
4157 at the front about calling Exim under different names.
4159 51. Added "extra_headers" argument to the "mail" command in filter files.
4161 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4164 53. Installed eximstats 1.29.
4166 54. Added transport_filter_timeout as a generic transport option.
4168 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4169 Cc: header lines. This was required by RFC 822, but it not required by RFC
4172 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4173 incoming messages that did not have them. Now it does so only if the
4174 message originates locally, that is, if there is no associated remote host
4175 address. When Resent- header lines are present, this applies to the Resent-
4176 lines rather than the non-Resent- lines.
4178 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4179 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4181 58. Messages for configuration errors now include the name of the main
4182 configuration file - useful now that there may be more than one file in a
4183 list (.included file names were always shown).
4185 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4186 for those rare installations that do not start the daemon as root or run it
4187 setuid root. I've cut out the call to initgroups() if the daemon is not
4190 60. The Exim user and group can now be bound into the binary as text strings
4191 that are looked up at the start of Exim's processing.
4193 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4195 62. Added $mailstore_basename variable.
4197 63. Installed patch to sieve.c from Michael Haardt.
4199 64. When Exim failed to open the panic log after failing to open the main log,
4200 the original message it was trying to log was written to stderr and debug
4201 output, but if they were not available (the usual case in production), it
4202 was lost. Now it is written to syslog before the two lines that record the
4203 failures to open the logs.
4205 65. Users' Exim filters run in subprocesses under the user's uid. It is
4206 possible for a "deliver" command or an alias in a "personal" command to
4207 provoke an address rewrite. If logging of address rewriting is configured,
4208 this fails because the process is not running as root or exim. There may be
4209 a better way of dealing with this, but for the moment (because 4.30 needs
4210 to be released), I have disabled address rewrite logging when running a
4211 filter in a non-root, non-exim process.
4217 1. The buildconfig auxiliary program wasn't quoting the value set for
4218 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4219 not defined. This bug was masked in 4.22 by the effect that was fixed in
4222 2. Some messages that were rejected after a message id was allocated were
4223 shown as "incomplete" by exigrep. It no longer does this for messages that
4224 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4226 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4227 have allow_domain_literals set, the ID did not get logged in the <= line.
4228 Domain literals are now always recognized in Message-ID: header lines.
4230 4. The first argument for a ${extract expansion item is the key name or field
4231 number. Leading and trailing spaces in this item were not being ignored,
4232 causing some misleading effects.
4234 5. When deliver_drop_privilege was set, single queue runner processes started
4235 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4236 same command in the process it spins off) were not dropping privilege.
4238 6. When the daemon running as "exim" started a queue runner, it always
4239 re-executed Exim in the spun-off process. This is a waste of effort when
4240 deliver_drop_privilege is set. The new process now just calls the
4241 queue-runner function directly.
4247 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4250 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4251 ignored. Though the use of -oP was forcing the writing of a pid file, it
4252 was always written to the default place.
4254 3. If the message "no IP address found for host xxxx" is generated during
4255 incoming verification, it is now followed by identification of the incoming
4256 connection (so you can more easily find what provoked it).
4258 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4260 5. Added some features to "harden" Exim a bit more against certain attacks:
4262 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4263 be put in Local/Makefile. This is like the never_users runtime option,
4264 but it cannot be overridden. The default setting is "root".
4266 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4267 prefix string with which any file named in a -C command line option
4270 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4271 is retained for -C and -D only if the caller of Exim is root. Without
4272 it, the exim user may also use -C and -D and retain privilege.
4274 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4275 command line option is disabled.
4277 6. Macro names set by the -D option must start with an upper case letter, just
4278 like macro names defined in the configuration file.
4280 7. Added "dereference=" facility to LDAP.
4282 8. Two instances of the typo "uknown" in the source files are fixed.
4284 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4285 the Configure-Makefile script screwed up while processing it.
4287 10. Incorporated PCRE 4.4.
4289 11. The SMTP synchronization check was not operating right at the start of an
4290 SMTP session. For example, it could not catch a HELO sent before the client
4291 waited for the greeting. There is now a check for outstanding input at the
4292 point when the greeting is written. Because of the duplex, asynchronous
4293 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4294 way, but not yet received, when the check is performed.
4296 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4297 on TCP/IP sockets, because this apparently causes some broken clients to
4300 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4301 unchanged) from the Cygwin maintainer.
4303 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4304 was supported instead of testing for mbx. Effectively a typo.
4306 15. The spa authenticator server code was not checking that the input it
4307 received was valid base64.
4309 16. The debug output line for the "set" modifier in ACLs was not showing the
4310 name of the variable that was being set.
4312 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4314 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4315 lookup on its own. Something else was needed to trigger the lookup. For
4316 example, a match in host_lookup or the need for a host name in a host list.
4317 Now, if $sender_host_name is referenced and the host name has not yet been
4318 looked up, a lookup is performed. If the lookup fails, the variable remains
4319 empty, and $host_lookup_failed is set to "1".
4321 19. Added "eqi" as a case-independent comparison operator.
4323 20. The saslauthd authentication condition could segfault if neither service
4324 nor realm was specified.
4326 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4327 error message that was logged was misleading, and incoming SMTP
4328 connections were dropped. The message is now more accurate, and temporary
4329 errors are given to SMTP connections.
4331 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4332 (except RSET) with a 421 error, until QUIT is received. However, it was
4333 failing to send a response to QUIT.
4335 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4336 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4337 ACL is now run after the helo_try_verify_hosts code.
4339 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4340 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4341 case-independent, so other case variants are also recognized). Apparently
4342 some systems use these upper case variants.
4344 25. If more than two messages were waiting for the same host, and a transport
4345 filter was specified for the transport, Exim sent two messages over the
4346 same TCP/IP connection, and then failed with "socket operation on non-
4347 socket" when it tried to send the third.
4349 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4351 27. The extern definition of crypt16() in expand.c was not being excluded when
4352 the OS had its own crypt16() function.
4354 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4355 as a preferred synonym for return_size_limit, both as an option and as an
4358 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4360 30. Changed the default configuration ACL to relax the local part checking rule
4361 for addresses that are not in any local domains. For these addresses,
4362 slashes and pipe symbols are allowed within local parts, but the sequence
4363 /../ is explicitly forbidden.
4365 31. SPA server authentication was not clearing the challenge buffer before
4368 32. log_message in a "warn" ACL statement was writing to the reject log as
4369 well as to the main log, which contradicts the documentation and doesn't
4370 seem right (because no rejection is happening). So I have stopped it.
4372 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4373 However, I am unable to do any testing of this.
4375 34. Fixed an infelicity in the appendfile transport. When checking directories
4376 for a mailbox, to see if any needed to be created, it was accidentally
4377 using path names with one or more superfluous leading slashes; tracing
4378 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4380 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4381 contents are added to the log line that is written for every discarded
4382 recipient. (Previously a log_message setting was ignored.)
4384 36. The ${quote: operator now quotes the string if it is empty.
4386 37. The install script runs exim in order to find its version number. If for
4387 some reason other than non-existence or emptiness, which it checks, it
4388 could not run './exim', it was installing it with an empty version number,
4389 i.e. as "exim-". This error state is now caught, and the installation is
4392 38. An argument was missing from the function that creates an error message
4393 when Exim fails to connect to the socket for saslauthd authentication.
4394 This could cause Exim to crash, or give a corrupted message.
4396 39. Added isip, isip4, and isip6 to ${if conditions.
4398 40. The ACL variables $acl_xx are now saved with the message, and can be
4399 accessed later in routers, transports, and filters.
4401 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4402 strings in the file are not string-expanded.
4404 42. If a MAIL command specified a SIZE value that was too large to fit into an
4405 int variable, the check against message_size_limit failed. Such values are
4406 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4407 day this will have to be increased, but I don't think I want to be around
4408 when emails are that large.
4415 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4416 iconv() is not standard in FreeBSD.
4418 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4419 IPv6 enabled. The observed symptom was a segmentation fault on return from
4420 the function os_common_find_running_interfaces() in src/os.c.
4422 3. In the check_special_case() function in daemon.c I had used "errno" as an
4423 argument name, which causes warnings on some systems. This was basically a
4424 typo, since it was named "eno" in the comments!
4426 4. The code that waits for the clock to tick (at a resolution of some fraction
4427 of a second) so as to ensure message-id uniqueness was always waiting for
4428 at least one whole tick, when it could have waited for less. [This is
4429 almost certainly not relevant at current processor speeds, where it is
4430 unlikely to ever wait at all. But we try to future-proof.]
4432 5. The function that sleeps for a time interval that includes fractions of a
4433 second contained a race. It did not block SIGALRM between setting the
4434 timer, and suspending (a couple of lines later). If the interval was short
4435 and the sigsuspend() was delayed until after it had expired, the suspension
4436 never ended. On busy systems this could lead to processes getting stuck for
4439 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4440 process, before it forks any delivery processes. The open lookup caching
4441 mechanism meant that the open file or database connection was passed into
4442 the delivery process. The problem was that delivery processes always tidy
4443 up cached lookup data. This could cause a problem for the next delivery
4444 process started by the queue runner, because the external queue runner
4445 process does not know about the closure. So the next delivery process
4446 still has data in the lookup cache. In the case of a file lookup, there was
4447 no problem because closing a file descriptor in a subprocess doesn't affect
4448 the parent. However, if the lookup was caching a connection to a database,
4449 the connection was closed, and the second delivery process was likely to
4450 see errors such as "PGSQL: query failed: server closed the connection
4451 unexpectedly". The problem has been fixed by closing all cached lookups
4452 in a queue runner before running a delivery process.
4454 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4455 seem to have the "const" qualifier which it has on other OS. I've
4458 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4459 *of the same type* (client or server) with the same public name that an
4460 error should be diagnosed.
4462 9. When Exim looked up a host name for an IP address, but failed to find the
4463 original IP address when looking up the host name (a safety check), it
4464 output the message "<ip address> does not match any IP for NULL", which was
4465 confusing, to say the least. The bug was that the host name should have
4466 appeared instead of "NULL".
4468 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4469 user that is built into the binary, and the -C or -D options is used, root
4470 privilege is dropped before the configuration file is read. In addition,
4471 logging is switched to stderr instead of the normal log files. If the
4472 configuration then re-defines the Exim user, the unprivileged environment
4473 is probably not what is expected, so Exim logs a panic warning message (but
4476 However, if deliver_drop_privilege is set, the unprivileged state may well
4477 be exactly what is intended, so the warning has been cut out in that case,
4478 and Exim is allowed to try to write to its normal log files.
4484 1. smtp_return_error_details was not giving details for temporary sender
4485 or receiver verification errors.
4487 2. Diagnose a configuration error if two authenticators have the same public
4490 3. Exim used not to create the message log file for a message until the first
4491 delivery attempt. This could be confusing when incoming messages were held
4492 for policy or load reasons. The message log file is now created at the time
4493 the message is received, and an initial "Received" line is written to it.
4495 4. The automatically generated man page for command line options had a minor
4496 bug that caused no ill effects; however, a more serious problem was that
4497 the procedure for building the man page automatically didn't always
4498 operate. Consequently, release 4.20 contains an out-of-date version. This
4499 shouldn't happen again.
4501 5. When building Exim with embedded Perl support, the script that builds the
4502 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4503 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4505 6. The freeze_tell option was not being used for messages that were frozen on
4506 arrival, either by an ACL or by local_scan().
4508 7. Added the smtp_incomplete_transaction log selector.
4510 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4511 was accepting AUTH without a new EHLO.
4513 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4514 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4517 10. Logging of TCP/IP connections (when configured) now happens in the main
4518 daemon process instead of the child process, so that the TCP/IP connection
4519 count is more accurate (but it can never be perfect).
4521 11. The use of "drop" in a nested ACL was not being handled correctly in the
4522 outer ACL. Now, if condition failure induced by the nested "drop" causes
4523 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4524 or "require"), the connection is dropped.
4526 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4527 that yield "discard" can now be used with an "accept" or a "discard" verb,
4528 but an error is generated for any others (because I can't see a useful way
4529 to define what should happen).
4531 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4532 are now processed in the same way as lines in the Exim configuration file.
4533 In particular, continuation lines are supported.
4535 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4537 15. Added -ti meaning -t -i.
4539 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4540 domains, and warn by logging if others are found.
4542 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4543 returned from GIFCONF when Exim is trying to find the list of interfaces on
4544 a host. The code in os.c has been modified to copy each ifreq to an aligned
4545 structure in all cases.
4547 Also, in some cases, the returned ifreq's were being copied to a 'struct
4548 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4549 means the last couple of bytes of an IPv6 address could be chopped if the
4550 ifreq contained only a normal sockaddr (14 bytes storage).
4552 18. Named domain lists were not supported in the hosts_treat_as_local option.
4553 An entry such as +xxxx was not recognized, and was treated as a literal
4556 19. Ensure that header lines added by a DATA ACL are included in the reject log
4557 if the ACL subsequently rejects the message.
4559 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4560 MD5 (which is deprecated).
4562 21. When testing a filter file using -bf, Exim was writing a message when it
4563 took the sender from a "From " line in the message, but it was not doing so
4564 when it took $return_path from a Return-Path: header line. It now does.
4566 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4567 with a valid header line field name (a series of printing characters
4568 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4570 23. Changed "disc" in the source to "disk" to conform to the documentation and
4571 the book and for uniformity.
4573 24. Ignore Sendmail's -Ooption=value command line item.
4575 25. When execve() failed while trying to run a command in a pipe transport,
4576 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4577 could be confused with a return value of 69 from the command itself. This
4578 has been changed to 127, the value the shell returns if it is asked to run
4579 a non-existent command. The wording for the related log line suggests a
4580 non-existent command as the problem.
4582 26. If received_header_text expands to an empty string, do not add a Received:
4583 header line to the message. (Well, it adds a token one on the spool, but
4584 marks it "old" so that it doesn't get used or transmitted.)
4586 27. Installed eximstats 1.28 (addition of -nt option).
4588 28. There was no check for failure on the call to getsockname() in the daemon
4589 code. This can fail if there is a shortage of resources on the system, with
4590 ENOMEM, for example. A temporary error is now given on failure.
4592 29. Contrary to the C standard, it seems that in some environments, the
4593 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4594 program. Exim now does this explicitly; it affects the formatting of
4595 timestamps using strftime().
4597 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4598 complaints. I've now initialized all the variables, to avoid this.
4600 32. Header lines added by a system filter were not being "seen" during
4601 transport-time rewrites.
4603 33. The info_callback() function passed to OpenSSL is set up with type void
4604 (*)(SSL *, int, int), as described somewhere. However, when calling the
4605 function (actually a macro) that sets it up, the type void(*)() is
4606 expected. I've put in a cast to prevent warnings from picky compilers.
4608 34. If a DNS black list lookup found a CNAME record, but there were no A
4609 records associated with the domain it pointed at, Exim crashed.
4611 35. If a DNS black list lookup returned more than one A record, Exim ignored
4612 all but the first. It now scans all returned addresses if a particular IP
4613 value is being sought. In this situation, the contents of the
4614 $dnslist_value variable are a list of all the addresses, separated by a
4617 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4618 to accept a host name and all its aliases if the forward lookup for any of
4619 them yielded the IP address of the incoming connection. Now it accepts only
4620 those names whose forward lookup yields the correct IP address. Any other
4621 names are discarded. This closes a loophole whereby a rogue DNS
4622 administrator could create reverse DNS records to break through a
4623 wildcarded host restriction in an ACL.
4625 37. If a user filter or a system filter that ran in a subprocess used any of
4626 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4627 the wrong values were passed to the pipe command ($thisaddress had the
4628 value of $0, $0 had the value of $1, etc). This bug was introduced by
4629 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4631 38. Improved the line breaking for long SMTP error messages from ACLs.
4632 Previously, if there was no break point between 40 and 75 characters, Exim
4633 left the rest of the message alone. Two changes have been made: (a) I've
4634 reduced the minimum length to 35 characters; (b) if it can't find a break
4635 point between 35 and 75 characters, it looks ahead and uses the first one
4636 that it finds. This may give the occasional overlong line, but at least the
4637 remaining text gets split now.
4639 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4640 file descriptors might be low, and that setting 1000 would always raise it.
4641 It turns out that in some environments, the limit is already over 1000 and
4642 that lowering it causes trouble. So now Exim takes care not to decrease it.
4644 40. When delivering a message, the value of $return_path is set to $sender_
4645 address at the start of routing (routers may change the value). By an
4646 oversight, this default was not being set up when an address was tested by
4647 -bt or -bv, which affected the outcome if any router or filter referred to
4650 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4651 log only when "message" or "log_message" are set. However, if one of the
4652 conditions was an address verification, or a call to a nested ACL, the
4653 messages generated by the underlying test were being passed through. This
4654 no longer happens. The underlying message is available in $acl_verify_
4655 message for both "message" and "log_message" expansions, so it can be
4656 passed through if needed.
4658 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4659 new expansion $bh_ to give the encoded byte string without charset
4660 translation. Translation happens only if iconv() is available; HAVE_ICONV
4661 indicates this at build time. HEADERS_CHARSET gives the charset to
4662 translate to; headers_charset can change it in the configuration, and
4663 "headers charset" can change it in an individual filter file.
4665 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4666 that creates RFC 2047 encoded "words" labels them as that charset instead
4667 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4668 expansion operator; (ii) when Exim creates a From: line for a local
4669 message; (iii) when a header line is rewritten to include a "phrase" part.
4671 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4672 buggy, causing it to skip the first lines of messages whose message ID
4673 ended in 'D'. This would not have bitten before Exim release 4.14, because
4674 message IDs were unlikely to end in 'D' before then. The effect was to have
4675 incorrect size information for certain domains.
4677 45. #include "config.h" was missing at the start of the crypt16.c module. This
4678 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4681 46. If there was a timeout during a "random" callout check, Exim treated it as
4682 a failure of the random address, and carried on sending RSET and the real
4683 address. If the delay was just some slowness somewhere, the response to the
4684 original RCPT would be taken as a response to RSET and so on, causing
4685 mayhem of various kinds.
4687 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4688 when I implemented it. It didn't allow for the fact that some option values
4689 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4690 the right test for positive values.
4692 48. Domain names in DNS records are case-independent. Exim always looks them up
4693 in lower case. Some resolvers return domain names in exactly the case they
4694 appear in the zone file, that is, they may contain uppercase letters. Not
4695 all resolvers do this - some return always lower case. Exim was treating a
4696 change of case by a resolver as a change of domain, similar to a widening
4697 of a domain abbreviation. This triggered its re-routing code and so it was
4698 trying to route what was effectively the same domain again. This normally
4699 caused routing to fail (because the router wouldn't handle the domain
4700 twice). Now Exim checks for this case specially, and just changes the
4701 casing of the domain that it ultimately uses when it transmits the message
4704 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4707 50. If a filter generated a file delivery with a non-absolute name (possible if
4708 no home directory exists for the router), the forbid_file option was not
4711 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4712 the existing equality matching.
4714 52. Exim was using ints instead of ino_t variables in some places where it was
4715 dealing with inode numbers.
4717 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4718 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4719 called TMPDIR, and if it finds it is different, it changes its value.
4721 54. The smtp_printf() function is now made available to local_scan() so
4722 additional output lines can be written before returning. There is also an
4723 smtp_fflush() function to enable the detection of a dropped connection.
4724 The variables smtp_input and smtp_batched_input are exported to
4727 55. Changed the default runtime configuration: the message "Unknown user"
4728 has been removed from the ACL, and instead placed on the localuser router,
4729 using the cannot_route_message feature. This means that any verification
4730 failures that generate their own messages won't get overridden. Similarly,
4731 the "Unrouteable address" message that was in the ACL for unverifiable
4732 relay addresses has also been removed.
4734 56. Added hosts_avoid_esmtp to the smtp transport.
4736 57. The exicyclog script was not checking for the esoteric option
4737 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4738 will work only if exicyclog is run under the appropriate euid.
4740 58. Following a discussion on the list, the rules by which Exim recognises line
4741 endings on incoming messages have been changed. The -dropcr and drop_cr
4742 options are now no-ops, retained only for backwards compatibility. The
4743 following line terminators are recognized: LF CRLF CR. However, special
4744 processing applies to CR:
4746 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4747 nor a local message in the state where . is a terminator.
4749 (ii) If a bare CR is encountered in a header line, an extra space is added
4750 after the line terminator so as not to end the header. The reasoning
4751 behind this is that bare CRs in header lines are most likely either
4752 to be mistakes, or people trying to play silly games.
4754 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4755 was being incorrectly given as 18 bytes larger than it should have been.
4756 This is a VOB (very old bug).
4758 60. This may never have affected anything current, but just in case it has:
4759 When the local host is found other than at the start of a list of hosts,
4760 the local host, those with the same MX, and any that follow, are discarded.
4761 When the list in question was part of a longer list of hosts, the following
4762 hosts (not currently being processed) were also being discarded. This no
4763 longer happens. I'm not sure if this situation could ever has previously
4766 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4769 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4770 header. This is something that is recommended in a new Internet Draft, and
4771 is something that is documented as being done by Sendmail. There are two
4772 possible values. For messages generated by the autoreply transport, Exim
4775 Auto-Submitted: auto-replied
4777 whereas for all other generated messages (e.g. bounces) it adds
4779 Auto-Submitted: auto-generated
4781 63. The "personal" condition in filters now includes a test for the
4782 Auto-Submitted: header. If it contains the string "auto-" the message it
4783 not considered personal.
4785 64. Added rcpt_include_affixes as a generic transport option.
4787 65. Added queue_only_override (default true).
4789 66. Added the syslog_duplication option.
4791 67. If what should have been the first header line of a message consisted of
4792 a space followed by a colon, Exim was mis-interpreting it as a header line.
4793 It isn't of course - it is syntactically invalid and should therefore be
4794 treated as the start of the message body. The misbehaviour could have
4795 caused a number of strange effects, including loss of data in subsequent
4796 header lines, and spool format errors.
4798 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4799 client host had authenticated. This control can now be exercised by an ACL
4800 for more flexibility.
4802 69. By default, callouts do not happen when testing with -bh. There is now a
4803 variant, -bhc, which does actually run the callout code, including
4804 consulting and updating the callout cache.
4806 70. Added support for saslauthd authentication, courtesy of Alexander
4809 71. If statvfs() failed on the spool or log directories while checking their
4810 size for availability, Exim confusingly gave the error "space shortage".
4811 Furthermore, in debugging mode it crashed with a floating point exception.
4812 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4813 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4814 serious problem, Exim now writes to the main and panic logs when this
4815 happens, with details of the failure. It then refuses to accept the
4816 incoming message, giving the message "spool directory problem" or "log
4817 directory problem" with a 421 code for SMTP messages.
4819 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4820 0, 1, and 2 exist, because some OS complain for execs without them (see
4821 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4822 descriptors. However, the code omitted to check that the open succeeded,
4823 causing mysterious errors if for some reason the permissions on /dev/null
4824 got screwed. Now Exim writes a message to the main and panic logs, and
4825 bombs out if it can't open /dev/null.
4827 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4828 interact so that it is all more flexible. It is supposed to remain
4829 backwards compatible. Also added extra_local_interfaces.
4831 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4832 to bomb out with an assertion failure - to the client this appears as a
4833 connection drop. This problem occurs in the part of the code that was taken
4834 from the Samba project. Fortunately, the assertion is in a very simple
4835 function, so I have fixed this by reproducing the function inline in the
4836 one place where it is called, and arranging for authentication to fail
4837 instead of killing the process with assert().
4839 75. The SPA client code was not working when the server requested OEM rather
4840 than Unicode encoding.
4842 76. Added code to make require_files with a specific uid setting more usable in
4843 the case where statting the file as root fails - usually a non-root-mounted
4844 NFS file system. When this happens and the failure is EACCES, Exim now
4845 forks a subprocess and does the per-uid checking as the relevant uid.
4847 77. Added process_log_path.
4849 78. If log_file_path was not explicitly set, a setting of check_log_space or
4850 check_log_inodes was ignored.
4852 79. If a space check for the spool or log partitions fails, the incident is now
4853 logged. Of course, in the latter case the data may get lost...
4855 80. Added the %p formatting code to string_format() so that it can be used to
4856 print addresses in debug_print(). Adjusted all the address printing in the
4857 debugging in store.c to use %p rather than %d.
4859 81. There was a concern that a line of code in smtp_in.c could overflow a
4860 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4861 initially expressed, the concern was not well-founded, because trailing
4862 spaces are removed early. However, if the trailing spaces were followed by
4863 a NULL, they did not get removed, so the overflow was possible. Two fixes
4866 (a) I re-wrote the offending code in a cleaner fashion.
4867 (b) If an incoming SMTP command contains a NULL character, it is rejected
4870 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4871 runs initgroups(), so that if the Exim user is in any additional groups,
4872 they will be used during message reception.
4878 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob