1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.539 2008/01/22 19:23:47 fanf2 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
10 When building exim an external PCRE library is now needed -
11 PCRE is a system library on the majority of modern systems.
12 See entry on PCRE_LIBS in EDITME file.
14 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
15 conversation. Added nologin parameter to request.
16 Patch contributed by Kirill Miazine
18 TF/01 Do not log submission mode rewrites if they do not change the address.
24 TK/01 Add preliminary DKIM support. Currently requires a forked version of
25 ALT-N's libdkim that I have put here:
26 http://duncanthrax.net/exim-experimental/
28 Note to Michael Haardt: I had to rename some vars in sieve.c. They
29 were called 'true' and it seems that C99 defines that as a reserved
30 keyword to be used with 'bool' variable types. That means you could
31 not include C99-style headers which use bools without triggering
32 build errors in sieve.c.
34 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
35 as mailq or other aliases. Changed the --help handling significantly
36 to do whats expected. exim_usage() emits usage/help information.
38 SC/01 Added the -bylocaldomain option to eximstats.
40 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr
42 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp
44 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall)
50 PH/01 Another patch from the Sieve maintainer.
52 PH/02 When an IPv6 address is converted to a string for single-key lookup
53 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
54 dots are used instead of colons so that keys in lsearch files need not
55 contain colons. This was done some time before quoting was made available
56 in lsearch files. However, iplsearch files do require colons in IPv6 keys
57 (notated using the quote facility) so as to distinguish them from IPv4
58 keys. This meant that lookups for IP addresses in host lists did not work
59 for iplsearch lookups.
61 This has been fixed by arranging for IPv6 addresses to be expressed with
62 colons if the lookup type is iplsearch. This is not incompatible, because
63 previously such lookups could never work.
65 The situation is now rather anomolous, since one *can* have colons in
66 ordinary lsearch keys. However, making the change in all cases is
67 incompatible and would probably break a number of configurations.
69 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
72 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
73 conversion specification without a maximum field width, thereby enabling
74 a rogue spamd server to cause a buffer overflow. While nobody in their
75 right mind would setup Exim to query an untrusted spamd server, an
76 attacker that gains access to a server running spamd could potentially
77 exploit this vulnerability to run arbitrary code as the Exim user.
79 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
80 $primary_hostname instead of what libspf2 thinks the hosts name is.
82 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
83 a directory entry by the name of the lookup key. Previously, if a
84 symlink pointed to a non-existing file or a file in a directory that
85 Exim lacked permissions to read, a lookup for a key matching that
86 symlink would fail. Now it is enough that a matching directory entry
87 exists, symlink or not. (Bugzilla 503.)
89 PH/03 The body_linecount and body_zerocount variables are now exported in the
92 PH/04 Added the $dnslist_matched variable.
94 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
95 This means they are set thereafter only if the connection becomes
98 PH/06 Added the client_condition to authenticators so that some can be skipped
99 by clients under certain conditions.
101 PH/07 The error message for a badly-placed control=no_multiline_responses left
102 "_responses" off the end of the name.
104 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
106 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
107 (without spaces) instead of just copying the configuration text.
109 PH/10 Added the /noupdate option to the ratelimit ACL condition.
111 PH/11 Added $max_received_linelength.
113 PH/12 Added +ignore_defer and +include_defer to host lists.
115 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
116 way in which PCRE > 7.0 is built.
118 PH/14 Implemented queue_only_load_latch.
120 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
121 MAIL command. The effect was to mangle the value on 64-bit systems.
123 PH/16 Another patch from the Sieve maintainer.
125 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
127 PH/18 If a system quota error occurred while trying to create the file for
128 a maildir delivery, the message "Mailbox is full" was not appended to the
129 bounce if the delivery eventually timed out. Change 4.67/27 below applied
130 only to a quota excession during the actual writing of the file.
132 PH/19 It seems that peer DN values may contain newlines (and other non-printing
133 characters?) which causes problems in log lines. The DN values are now
134 passed through string_printing() before being added to log lines.
136 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
137 and InterBase are left for another time.)
139 PH/21 Added message_body_newlines option.
141 PH/22 Guard against possible overflow in moan_check_errorcopy().
143 PH/23 POSIX allows open() to be a macro; guard against that.
145 PH/24 If the recipient of an error message contained an @ in the local part
146 (suitably quoted, of course), incorrect values were put in $domain and
147 $local_part during the evaluation of errors_copy.
153 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
154 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
157 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
158 issue a MAIL command.
160 PH/02 In an ACL statement such as
162 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
164 if a client was not listed at all, or was listed with a value other than
165 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
166 the condition was not true (as it should be), so access was not denied.
167 The bug was that the ! inversion was incorrectly passed on to the second
168 item. This has been fixed.
170 PH/03 Added additional dnslists conditions == and =& which are different from
171 = and & when the dns lookup returns more than one IP address.
173 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
174 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
176 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
177 FSYNC, which compiles an option called disable_fsync that allows for
178 bypassing fsync(). The documentation is heavily laced with warnings.
180 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
182 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
183 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
184 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
185 including adding "make clean"; (3) Added -fPIC when compiling the test
186 dynamically loaded module, to get rid of a warning.
188 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
189 message fails, move_frozen_messages = true and ignore_bounce_errors_after
190 = 0s. The bug is otherwise harmless.
192 PH/07 There was a bug in the dovecot authenticator such that the value of
193 $auth1 could be overwritten, and so not correctly preserved, after a
194 successful authentication. This usually meant that the value preserved by
195 the server_setid option was incorrect.
197 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
199 PH/09 Installed PCRE release 7.0.
201 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
202 run for batched SMTP input. It is now run at the start of every message
203 in the batch. While fixing this I discovered that the process information
204 (output by running exiwhat) was not always getting set for -bs and -bS
205 input. This is fixed, and it now also says "batched" for BSMTP.
207 PH/11 Added control=no_pipelining.
209 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
210 patch, slightly modified), and move the expansion of helo_data till after
211 the connection is made in the smtp transport (so it can use these
214 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
216 PH/14 Added log_selector = +pid.
218 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
220 PH/16 Add ${if forany and ${if forall.
222 PH/17 Added dsn_from option to vary the From: line in DSNs.
224 PH/18 Flush SMTP output before performing a callout, unless control =
225 no_callout_flush is set.
227 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
228 was true (the default) a successful delivery failed to delete the retry
229 item, thus causing premature timeout of the address. The bug is now
232 PH/20 Added hosts_avoid_pipelining to the smtp transport.
234 PH/21 Long custom messages for fakedefer and fakereject are now split up
235 into multiline reponses in the same way that messages for "deny" and
236 other ACL rejections are.
238 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
239 with slight modification.
241 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
242 draft, changing the syntax and factoring some duplicate code".
244 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
245 for deliveries of the second and subsequent messages over the same SMTP
248 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
249 ${reduce, with only minor "tidies".
251 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
253 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
254 expansion side effects.
256 PH/27 When a message times out after an over-quota error from an Exim-imposed
257 quota, the bounce message says "mailbox is full". This message was not
258 being given when it was a system quota that was exceeded. It now should
261 MH/03 Made $recipients available in local_scan(). local_scan() already has
262 better access to the recipient list through recipients_list[], but
263 $recipients can be useful in postmaster-provided expansion strings.
265 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
266 in the case of a MAIL command with additional options following the
267 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
268 were accidentally chopped off.
270 PH/29 SMTP synchronization checks are implemented when a command is read -
271 there is a check that no more input is waiting when there shouldn't be
272 any. However, for some commands, a delay in an ACL can mean that it is
273 some time before the response is written. In this time, more input might
274 arrive, invalidly. So now there are extra checks after an ACL has run for
275 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
276 pipelining has not been advertised.
278 PH/30 MH's patch to allow iscntrl() characters to be list separators.
280 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
281 returned in the SMTP response when smtp_return_error_details was false.
284 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
285 instead of the C I/O that was originally supplied, because problems were
288 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
289 Exim which did not show up earlier: it was assuming that a call to
290 SSL_CTX_set_info_callback() might give an error value. In fact, there is
291 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
292 was a macro that became an assignment, so it seemed to work. This has
293 changed to a proper function call with a void return, hence the compile
294 error. Exim's code has been fixed.
296 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
299 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
301 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
303 PH/37 If a message is not accepted after it has had an id assigned (e.g.
304 because it turns out to be too big or there is a timeout) there is no
305 "Completed" line in the log. When some messages of this type were
306 selected by exigrep, they were listed as "not completed". Others were
307 picked up by some special patterns. I have improved the selection
308 criteria to be more general.
310 PH/38 The host_find_failed option in the manualroute router can now be set
311 to "ignore", to completely ignore a host whose IP address cannot be
312 found. If all hosts are ignored, the behaviour is controlled by the new
313 host_all_ignored option.
315 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
316 homing or because of multiple MX records with /mx) generated more than
317 one IP address, and the following item turned out to be the local host,
318 all the secondary addresses of the first item were incorrectly removed
319 from the list, along with the local host and any following hosts (which
320 is what is supposed to happen).
322 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
323 whoever called Exim into the -H file. In the case of the daemon it was
324 behaving confusingly. When first started, it used values for whoever
325 started the daemon, but after a SIGHUP it used the Exim user (because it
326 calls itself on a restart). I have changed the code so that it now always
329 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
330 message are rejected with the same error (e.g. no authentication or bad
331 sender address), and a DATA command is nevertheless sent (as can happen
332 with PIPELINING or a stupid MUA), the error message that was given to the
333 RCPT commands is included in the rejection of the DATA command. This is
334 intended to be helpful for MUAs that show only the final error to their
337 PH/42 Another patch from the Sieve maintainer.
339 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
340 Eximstats - Fixed some broken HTML links and added missing column headers
342 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
343 columns for Rejects, Temp Rejects, Ham, and Spam rows.
345 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
347 PH/43 Yet another patch from the Sieve maintainer.
349 PH/44 I found a way to check for a TCP/IP connection going away before sending
350 the response to the final '.' that terminates a message, but only in the
351 case where the client has not sent further data following the '.'
352 (unfortunately, this is allowed). However, in many cases there won't be
353 any further data because there won't be any more messages to send. A call
354 to select() can be used: if it shows that the input is "ready", there is
355 either input waiting, or the socket has been closed. An attempt to read
356 the next input character can distinguish the two cases. Previously, Exim
357 would have sent an OK response which the client would never have see.
358 This could lead to message repetition. This fix should cure that, at
359 least in a lot of common cases.
361 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
362 advertised in response to EHLO.
368 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
369 fixed by 4.65/MH/01 (is this a record?) are fixed:
371 (i) An empty string was always treated as zero by the numeric comparison
372 operators. This behaviour has been restored.
374 (ii) It is documented that the numeric comparison operators always treat
375 their arguments as decimal numbers. This was broken in that numbers
376 starting with 0 were being interpreted as octal.
378 While fixing these problems I realized that there was another issue that
379 hadn't been noticed. Values of message_size_limit (both the global option
380 and the transport option) were treated as octal if they started with 0.
381 The documentation was vague. These values are now always treated as
382 decimal, and I will make that clear in the documentation.
388 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
389 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
392 MH/01 Don't check that the operands of numeric comparison operators are
393 integers when their expansion is in "skipping" mode (fixes bug
394 introduced by 4.64-PH/07).
396 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
397 child addresses, Exim now panics and dies. Previously, because the count
398 is held in a short int, deliveries were likely to be lost. As such a
399 large number of recipients for a single message is ridiculous
400 (performance will be very, very poor), I have chosen to impose a limit
401 rather than extend the field.
407 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
408 leftover -K file (the existence of which was triggered by #402).
409 While we were at it, introduced process PID as part of the -K
410 filename. This should rule out race conditions when creating
413 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
414 processing considerably. Previous code took too long for large mails,
415 triggering a timeout which in turn triggers #401.
417 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
418 in the DK code in transports.c. sendfile() is not really portable,
419 hence the _LINUX specificness.
421 TF/01 In the add_headers option to the mail command in an Exim filter,
422 there was a bug that Exim would claim a syntax error in any
423 header after the first one which had an odd number of characters
426 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
427 callout verification, Exim cached a "reject" for the entire domain. This
428 is correct for most verifications, but it is not correct for a recipient
429 verification with use_sender or use_postmaster set, because in that case
430 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
431 case of MAIL FROM:<> rejection from other early rejections (e.g.
432 rejection of HELO). When verifying a recipient using a non-null MAIL
433 address, the cache is ignored if it shows MAIL FROM:<> rejection.
434 Whatever the result of the callout, the value of the domain cache is
435 left unchanged (for any other kind of callout, getting as far as trying
436 RCPT means that the domain itself is ok).
438 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
441 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
442 manifest itself as EPIPE rather than ECONNECT. When tidying away a
443 session, the daemon ignores ECONNECT errors and logs others; it now
444 ignores EPIPE as well.
446 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
447 (quoted-printable decoding).
449 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
450 later the small subsequent patch to fix an introduced bug.
452 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
454 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
456 PH/08 An error is now given if message_size_limit is specified negative.
458 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
459 to be given (somewhat) arbitrary names.
461 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
464 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
465 miscellaneous code fixes
467 PH/10 Added the log_reject_target ACL modifier to specify where to log
470 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
471 hostname. This is wrong, because it relates to the incoming message (and
472 probably the interface on which it is arriving) and not to the outgoing
473 callout (which could be using a different interface). This has been
474 changed to use the value of the helo_data option from the smtp transport
475 instead - this is what is used when a message is actually being sent. If
476 there is no remote transport (possible with a router that sets up host
477 addresses), $smtp_active_hostname is used.
479 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
480 tweaks were necessary in order to get it to work (see also 21 below):
481 (a) The code assumed that strncpy() returns a negative number on buffer
482 overflow, which isn't the case. Replaced with Exim's string_format()
484 (b) There were several signed/unsigned issues. I just did the minimum
485 hacking in of casts. There is scope for a larger refactoring.
486 (c) The code used strcasecmp() which is not a standard C function.
487 Replaced with Exim's strcmpic() function.
488 (d) The code set only $1; it now sets $auth1 as well.
489 (e) A simple test gave the error "authentication client didn't specify
490 service in request". It would seem that Dovecot has changed its
491 interface. Fortunately there's a specification; I followed it and
492 changed what the client sends and it appears to be working now.
494 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
497 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
498 address A is aliased to B and C, where B exists and C does not. Without
499 -v the output is "A verified" because verification stops after a
500 successful redirection if more than one address is generated. However,
501 with -v the child addresses are also verified. Exim was outputting "A
502 failed to verify" and then showing the successful verification for C,
503 with its parentage. It now outputs "B failed to verify", showing B's
504 parentage before showing the successful verification of C.
506 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
507 look up a TXT record in a specific list after matching in a combined
510 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
511 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
512 they consult the DNS. I had assumed they would set it the way they
513 wanted; and indeed my experiments on Linux seem to show that in some
514 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
515 To be on the safe side, however, I have now made the interface to
516 host_find_byname() similar to host_find_bydns(), with an argument
517 containing the DNS resolver options. The host_find_byname() function now
518 sets these options at its start, just as host_find_bydns() does. The smtp
519 transport options dns_qualify_single and dns_search_parents are passed to
520 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
521 of host_find_byname() use the default settings of RES_DEFNAMES
522 (qualify_single) but not RES_DNSRCH (search_parents).
524 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
525 spool_read_header() do less string testing, by means of a preliminary
526 switch on the second character of optional "-foo" lines. (This is
527 overdue, caused by the large number of possibilities that now exist.
528 Originally there were few.) While I was there, I also converted the
529 str(n)cmp tests so they don't re-test the leading "-" and the first
530 character, in the hope this might squeeze out yet more improvement.
532 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
533 flag allowing group syntax was set by the header_syntax check but not
534 turned off, possible causing trouble later; (2) The flag was not being
535 set at all for the header_verify test, causing "group"-style headers to
536 be rejected. I have now set it in this case, and also caused header_
537 verify to ignore an empty address taken from a group. While doing this, I
538 came across some other cases where the code for allowing group syntax
539 while scanning a header line wasn't quite right (mostly, not resetting
540 the flag correctly in the right place). These bugs could have caused
541 trouble for malformed header lines. I hope it is now all correct.
543 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
544 with the "reply" argument non-NULL. The code, however (which originally
545 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
546 but it didn't always do it. This confused somebody who was copying the
547 code for some other use. I have removed all the tests.
549 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
550 feature that was used to support insecure browsers during the U.S. crypto
551 embargo. It requires special client support, and Exim is probably the
552 only MTA that supported it -- and would never use it because real RSA is
553 always available. This code has been removed, because it had the bad
554 effect of slowing Exim down by computing (never used) parameters for the
555 RSA_EXPORT functionality.
557 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
558 authenticator to fail if there's a tab character in the incoming data
559 (there should never be unless someone is messing about, as it's supposed
560 to be base64-encoded). Also added, on Timo's advice, the "secured" option
561 if the connection is using TLS or if the remote IP is the same as the
562 local IP, and the "valid-client-cert option" if a client certificate has
565 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
566 authenticators. This can be used for authorization after authentication
567 succeeds. (In the case of plaintext, it servers for both authentication
570 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
571 if any retry times were supplied.
573 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
574 connection, where there is no client IP address to check. In this
575 situation, the verify now always succeeds.
577 PH/25 Applied John Jetmore's -Mset patch.
579 PH/26 Added -bem to be like -Mset, but loading a message from a file.
581 PH/27 In a string expansion for a processed (not raw) header when multiple
582 headers of the same name were present, leading whitespace was being
583 removed from all of them, but trailing whitespace was being removed only
584 from the last one. Now trailing whitespace is removed from each header
585 before concatenation. Completely empty headers in a concatenation (as
588 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
589 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
591 PH/29 [Removed. This was a change that I later backed out, and forgot to
592 correct the ChangeLog entry (that I had efficiently created) before
593 committing the later change.]
595 PH/30 Exim was sometimes attempting to deliver messages that had suffered
596 address errors (4xx response to RCPT) over the same connection as other
597 messages routed to the same hosts. Such deliveries are always "forced",
598 so retry times are not inspected. This resulted in far too many retries
599 for the affected addresses. The effect occurred only when there were more
600 hosts than the hosts_max_try setting in the smtp transport when it had
601 the 4xx errors. Those hosts that it had tried were not added to the list
602 of hosts for which the message was waiting, so if all were tried, there
603 was no problem. Two fixes have been applied:
605 (i) If there are any address or message errors in an SMTP delivery, none
606 of the hosts (tried or untried) are now added to the list of hosts
607 for which the message is waiting, so the message should not be a
608 candidate for sending over the same connection that was used for a
609 successful delivery of some other message. This seems entirely
610 reasonable: after all the message is NOT "waiting for some host".
611 This is so "obvious" that I'm not sure why it wasn't done
612 previously. Hope I haven't missed anything, but it can't do any
613 harm, as the worst effect is to miss an optimization.
615 (ii) If, despite (i), such a delivery is accidentally attempted, the
616 routing retry time is respected, so at least it doesn't keep
617 hammering the server.
619 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
620 in ${readsocket because some servers need this prod.
622 PH/32 Added some extra debug output when updating a wait-xxx database.
624 PH/33 The hint "could be header name not terminated by colon", which has been
625 given for certain expansion errors for a long time, was not being given
626 for the ${if def:h_colon_omitted{... case.
628 PH/34 The spec says: "With one important exception, whenever a domain list is
629 being scanned, $domain contains the subject domain." There was at least
630 one case where this was not true.
632 PH/35 The error "getsockname() failed: connection reset by peer" was being
633 written to the panic log as well as the main log, but it isn't really
634 panic-worthy as it just means the connection died rather early on. I have
635 removed the panic log writing for the ECONNRESET error when getsockname()
638 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
639 runs only) independently of the message's sender address. This meant
640 that, if the 4xx error was in fact related to the sender, a different
641 message to the same recipient with a different sender could confuse
642 things. In particualar, this can happen when sending to a greylisting
643 server, but other circumstances could also provoke similar problems.
644 I have changed the default so that the retry time for these errors is now
645 based a combination of the sender and recipient addresses. This change
646 can be overridden by setting address_retry_include_sender=false in the
649 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
650 remote server are returned as part of bounce messages. This was not
651 happening for LMTP over a pipe (the lmtp transport), but now it is the
652 same for both kinds of LMTP.
654 PH/38 Despite being documented as not happening, Exim was rewriting addresses
655 in header lines that were in fact CNAMEs. This is no longer the case.
657 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
658 and queue runs started by the daemon processed all messages. This has
659 been fixed so that -R and -S can now usefully be given with -q<time>.
661 PH/40 Import PCRE release 6.7 (fixes some bugs).
663 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
665 PH/42 Give an error if -q is specified more than once.
667 PH/43 Renamed the variables $interface_address and $interface_port as
668 $received_ip_address and $received_port, to make it clear that these
669 values apply to message reception, and not to the outgoing interface when
670 a message is delivered. (The old names remain recognized, of course.)
672 PH/44 There was no timeout on the connect() call when using a Unix domain
673 socket in the ${readsocket expansion. There now is.
675 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
676 be meaningful with "accept".
678 SC/01 Eximstats V1.43
679 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
681 SC/02 Eximstats V1.44
682 Use a glob alias rather than an array ref in the generated
683 parser. This improves both readability and performance.
685 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
686 Collect SpamAssassin and rejection statistics.
687 Don't display local sender or destination tables unless
688 there is data to show.
689 Added average volumes into the top table text output.
691 SC/04 Eximstats V1.46
692 Collect data on the number of addresses (recipients)
693 as well as the number of messages.
695 SC/05 Eximstats V1.47
696 Added 'Message too big' to the list of mail rejection
697 reasons (thanks to Marco Gaiarin).
699 SC/06 Eximstats V1.48
700 Mainlog lines which have GMT offsets and are too short to
701 have a flag are now skipped.
703 SC/07 Eximstats V1.49 (Alain Williams)
704 Added the -emptyok flag.
706 SC/08 Eximstats V1.50
707 Fixes for obtaining the IP address from reject messages.
709 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
710 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
711 whitesspace changes from 4.64-PH/27
713 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
716 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
717 are found, allow negative numbers in numeric criteria)
719 JJ/06 exipick.20061117.2, added new $message_body_missing variable
721 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
722 to match changes made in 4.64-PH/43
724 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
726 PH/47 Put in an explicit test for a DNS lookup of an address record where the
727 "domain" is actually an IP address, and force a failure. This locks out
728 those revolvers/nameservers that support "A-for-A" lookups, in
729 contravention of the specifications.
731 PH/48 When a host name was looked up from an IP address, and the subsequent
732 forward lookup of the name timed out, the host name was left in
733 $sender_host_name, contrary to the specification.
735 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
736 restricted to single-key lookups, Exim was not diagnosing an error if
737 * or *@ was used with a query-style lookup.
739 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
741 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
742 long ago, but noone interested enough thought of it. Let's just say that
743 the "1.1" means that there are some new functions that weren't there at
744 some point in the past.
746 PH/51 Error processing for expansion failure of helo_data from an smtp
747 transport during callout processing was broken.
749 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
750 tested/used via the -bh/-bhc/-bs options.
752 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
753 bug, fixed in subsequent PCRE releases).
755 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
756 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
758 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
764 SC/01 Use a glob alias rather than an array ref in eximstats generated
765 parser. This improves both readability and performance.
767 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
768 Don't display local sender or destination tables in eximstats unless
769 there is data to show.
770 Added average volumes into the eximstats top table text output.
772 SC/03 Collect data on the number of addresses (recipients) as well
773 as the number of messages in eximstats.
775 TF/01 Correct an error in the documentation for the redirect router. Exim
776 does (usually) call initgroups() when daemonizing.
778 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
779 with consistent privilege compared to when running as a daemon.
781 TF/03 Note in the spec that $authenticated_id is not set for local
782 submissions from trusted users.
784 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
785 Thanks to Dean Brooks <dean@iglou.com> for the patch.
787 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
788 by adding some example configuration directives to the default
789 configuration file. A little bit of work is required to uncomment the
790 directives and define how usernames and passwords are checked, but
791 there is now a framework to start from.
793 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
794 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
795 without this. I don't know how relevant this is to other LDAP libraries.
797 PH/02 Add the verb name to the "unknown ACL verb" error.
799 PH/03 Magnus Holmgren's patch for filter_prepend_home.
801 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
803 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
804 directory not expanded when it should be if an expanded home directory
805 was set for the address (which is overridden by the transport).
807 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
810 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
811 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
812 because it is too late at that time, and has no effect.
814 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
815 security issue with \' (bugzilla #107). I could not use the
816 PQescapeStringConn() function, because it needs a PGconn value as one of
819 PH/08 When testing addresses using -bt, indicate those final addresses that
820 are duplicates that would not cause an additional delivery. At least one
821 person was confused, thinking that -bt output corresponded to deliveries.
822 (Suppressing duplicates isn't a good idea as you lose the information
823 about possibly different redirections that led to the duplicates.)
825 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
826 systems where poll() doesn't work, in particular OS X.
828 PH/10 Added more information to debugging output for retry time not reached.
830 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
831 operations in malware.c.
833 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
836 PH/13 If write_rejectlog was set false when logging was sent to syslog with
837 syslog_duplication set false, log lines that would normally be written
838 both the the main log and to the reject log were not written to syslog at
841 PH/14 In the default configuration, change the use of "message" in ACL warn
842 statements to "add_header".
844 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
845 not followed by a command (e.g. "seen endif").
847 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
848 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
851 PH/17 Added extra conditions to the default value of delay_warning_condition
855 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
856 { match{$h_precedence:}{(?i)bulk|list|junk} } \
857 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
860 The Auto-Submitted: and various List- headers are standardised, whereas I
861 don't think Precedence: ever was.
863 PH/18 Refactored debugging code in route_finduser() to show more information,
864 in particular, the error code if getpwnam() issues one.
866 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
867 This is apparently needed in addition to the PH/07 change above to avoid
868 any possible encoding problems.
870 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
871 but not after initializing Perl.
873 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
874 output them only if debugging. By default they are written stderr,
875 apparently, which is not desirable.
877 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
880 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
883 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
885 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
886 authenticated or an ident call has been made. Suppress the default
887 values for $authenticated_id and $authenticated_sender (but permit -oMai
888 and -oMas) when testing with -bh.
890 PH/24 Re-jigged the order of the tests in the default configuration so that the
891 tests for valid domains and recipients precede the DNS black list and CSA
892 tests, on the grounds that those ones are more expensive.
894 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
895 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
896 This bug exists in every version of Exim that I still have, right back to
899 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
900 However, an attempt to turn on case-sensitivity in a regex key by
901 including (?-i) didn't work because the subject string was already
902 lowercased, and the effects were non-intuitive. It turns out that a
903 one-line patch can be used to allow (?-i) to work as expected.
909 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
910 other effects) broke the use of negated acl sub-conditions.
912 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
915 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
916 "Deny" causes Exim to reject the incoming connection with a 554 error.
917 Unfortunately, if there is a major crisis, such as a disk failure,
918 tcp-wrappers gives "deny", whereas what one would like would be some
919 kind of temporary error. A kludge has been added to help with this.
920 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
921 554 error is used if errno is still zero or contains ENOENT (which occurs
922 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
925 PH/03 Add -lutil to the default FreeBSD LIBS setting.
927 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
928 errors. Otherwise a message that provokes a temporary error (when other
929 messages do not) can cause a whole host to time out.
931 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
932 addresses were routed directly to files or pipes from a redirect router.
933 File deliveries just didn't batch; pipe deliveries might have suffered
936 PH/06 A failure to get a lock for a hints database would erroneously always say
937 "Failed to get write lock", even when it was really a read lock.
939 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
940 of 0600. This has been changed to use the value of the lockfile_mode
941 option (which defaults to 0600).
943 PH/08 Applied small patch from the Sieve maintainer.
945 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
946 folder from quota calculations, a direct delivery into this folder messed
947 up the contents of the maildirsize file. This was because the regex was
948 used only to exclude .Trash (or whatever) when the size of the mailbox
949 was calculated. There was no check that a delivery was happening into an
950 excluded directory. This bug has been fixed by ignoring all quota
951 processing for deliveries into excluded directories.
953 PH/10 Added the maildirfolder_create_regex option to appendfile.
959 PH/01 The code for finding all the local interface addresses on a FreeBSD
960 system running IPv6 was broken. This may well have applied to all BSD
961 systems, as well as to others that have similar system calls. The broken
962 code found IPv4 interfaces correctly, but gave incorrect values for the
963 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
964 that it would not match correctly against @[] and not recognize the IPv6
967 PH/02 The ipliteral router was not recognizing addresses of the form user@
968 [ipv6:....] because it didn't know about the "ipv6:" prefix.
970 PH/03 Added disable_ipv6.
972 PH/04 Changed $reply_address to use the raw form of the headers instead of the
973 decoded form, because it is most often used to construct To: headers
974 lines in autoreplies, and the decoded form may well be syntactically
975 invalid. However, $reply_address has leading white space removed, and all
976 newlines turned into spaces so that the autoreply transport does not
979 PH/05 If group was specified without a user on a router, and no group or user
980 was specified on a transport, the group from the router was ignored.
982 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
983 for visible compile-time settings that can be used to change these
984 numbers, for those that want even more. Backwards compatibility with old
985 spool files has been maintained. However, going back to a previous Exim
986 release will lost any variables that are in spool files.
988 PH/07 Two small changes when running in the test harness: increase delay when
989 passing a TCP/IP connection to a new process, in case the original
990 process has to generate a bounce, and remove special handling of
991 127.0.0.2 (sic), which is no longer necessary.
993 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
994 be the same on different OS.
996 PH/09 Moved a debug statement in filter processing to avoid a race problem when
999 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1000 whether --show-vars was specified or not
1002 JJ/02 exipick: Added support for new ACL variable spool format introduced
1005 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1006 syntactically invalid From: or Reply-to: line, and a filter used this to
1007 generate an autoreply, and therefore failed to obtain an address for the
1008 autoreply, Exim could try to deliver to a non-existent relative file
1009 name, causing unrelated and misleading errors. What now happens is that
1010 it logs this as a hard delivery error, but does not attempt to create a
1013 PH/11 The exinext utility has a -C option for testing purposes, but although
1014 the given file was scanned by exinext itself; it wasn't being passed on
1015 when Exim was called.
1017 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1018 an end-of-file indication when reading a command response.
1020 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1021 compiled. In many other places in Exim, IPv6 addresses are always
1022 recognized, so I have changed this. It also means that IPv4 domain
1023 literals of the form [IPV4:n.n.n.n] are now always recognized.
1025 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1026 used if the router is not running as root, for example, when verifying at
1027 ACL time, or when using -bh. The debugging output from this situation was
1028 non-existent - all you got was a failure to exec. I have made two
1031 (a) Failures to set uid/gid, the current directory, or a process leader
1032 in a subprocess such as that created by queryprogram now generate
1033 suitable debugging ouput when -d is set.
1035 (b) The queryprogram router detects when it is not running as root,
1036 outputs suitable debugging information if -d is set, and then runs
1037 the subprocess without attempting to change uid/gid.
1039 PH/15 Minor change to Makefile for building test_host (undocumented testing
1042 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1043 additional section of a DNS packet that returns MX or SRV records.
1044 Instead, it always explicitly searches for A/AAAA records. This avoids
1045 major problems that occur when a DNS server includes only records of one
1046 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1047 fixed another bug: if SRV records were looked up and the corresponding
1048 address records were *not* found in the additional section, the port
1049 values from the SRV records were lost.
1051 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1052 using the correct key (the original address) when searching the retry
1053 rules in order to find which one to use for generating the retry hint.
1055 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1056 adding the default one. Similarly, if it contains a Reply-To: header, the
1057 errors_reply_to option, if set, is not used.
1059 PH/19 When calculating a retry time, Exim used to measure the "time since
1060 failure" by looking at the "first failed" field in the retry record. Now
1061 it does not use this if it is later than than the arrival time of the
1062 message. Instead it uses the arrival time. This makes for better
1063 behaviour in cases where some deliveries succeed, thus re-setting the
1064 "first failed" field. An example is a quota failure for a huge message
1065 when small messages continue to be delivered. Without this change, the
1066 "time since failure" will always be short, possible causing more frequent
1067 delivery attempts for the huge message than are intended.
1068 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1070 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1071 $1, $2, $3) because the numerical variables can be reset during some
1072 expansion items (e.g. "match"), thereby losing the authentication data.
1074 PH/21 Make -bV show the size of off_t variables so that the test suite can
1075 decide whether to run tests for quotas > 2G.
1077 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1078 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1079 filecount value is greater than 2G or if a quota value is greater than 2G
1080 on a system where the size of off_t is not greater than 4, a panic error
1083 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1084 never match. The debug and -bh output now contains an explicit error
1085 message indicating a malformed IPv4 address or mask.
1087 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1088 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1089 PH/23 above applies.
1091 PH/25 Do not write to syslog when running in the test harness. The only
1092 occasion when this arises is a failure to open the main or panic logs
1093 (for which there is an explicit test).
1095 PH/26 Added the /no_tell option to "control=freeze".
1097 PH/27 If a host name lookup failed very early in a connection, for example, if
1098 the IP address matched host_lookup and the reverse lookup yielded a name
1099 that did not have a forward lookup, an error message of the form "no IP
1100 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1101 could be logged. Now it outputs the IP address instead of "NULL".
1103 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1104 allows the sender and the authenticated sender to be set when
1105 submitting a message from within Exim. Since child_open_exim() is
1106 documented for local_scan(), the new function should be too.
1108 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1109 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1110 results in an empty string is now treated as unset.
1112 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1114 PH/31 Added sender_verify_fail logging option.
1116 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1117 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1118 tidied the source and removed it altogether.
1120 PH/33 When a queue run was abandoned because the load average was too high, a
1121 log line was always written; now it is written only if the queue_run log
1122 selector is set. In addition, the log line for abandonment now contains
1123 information about the queue run such as the pid. This is always present
1124 in "start" and "stop" lines but was omitted from the "abandon" line.
1126 PH/34 Omit spaces between a header name and the colon in the error message that
1127 is given when verify = headers_syntax fails (if there are lots of them,
1128 the message gets confusing).
1130 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1131 names, as there are now some PTR records that contain slashes. This check
1132 is only to protect against broken name servers that fall over on strange
1133 characters, so the fact that it applies to all lookups doesn't matter.
1135 PH/36 Now that the new test suite is complete, we can remove some of the
1136 special code in Exim that was needed for the old test suite. For example,
1137 sorting DNS records because real resolvers return them in an arbitrary
1138 order. The new test suite's fake resolver always returns records in the
1141 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1142 bounces) except when queue_only is set, to avoid logging races between
1143 the different processes.
1145 PH/38 Panic-die if .include specifies a non-absolute path.
1147 PH/39 A tweak to the "H" retry rule from its user.
1149 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1150 a label. They prevented compilation on older perls.
1152 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1153 a warning to be raised on newish perls.
1155 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1156 on queue. Changes to match documented behaviour of showing count of
1157 messages matching specified criteria.
1159 PH/40 Changed the default ident timeout from 30s to 5s.
1161 PH/41 Added support for the use of login_cap features, on those BSD systems
1162 that have them, for controlling the resources used by pipe deliveries.
1164 PH/42 The content-scanning code uses fopen() to create files in which to put
1165 message data. Previously it was not paying any attention to the mode of
1166 the files. Exim runs with umask(0) because the rest of the code creates
1167 files with open(), and sets the required mode explicitly. Thus, these
1168 files were ending up world-writeable. This was not a big issue, because,
1169 being within the spool directory, they were not world-accessible. I have
1170 created a function called modefopen, which takes an additional mode
1171 argument. It sets umask(777), creates the file, chmods it to the required
1172 mode, then resets the umask. All the relevant calls to fopen() in the
1173 content scanning code have been changed to use this function.
1175 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1176 to 24 hours. This avoids potential overflow problems when processing G
1177 and H retry rules. I suspect nobody ever tinkers with this value.
1179 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1181 PH/45 When the plaintext authenticator is running as a client, the server's
1182 challenges are checked to ensure they are valid base64 strings. By
1183 default, the authentication attempt is cancelled if an invalid string is
1184 received. Setting client_ignore_invalid_base64 true ignores these errors.
1185 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1186 they are received. Thus, the responses can be made to depend on the
1187 challenges. If an invalid string is ignored, an empty string is placed in
1190 PH/46 Messages that are created by the autoreply transport now contains a
1191 References: header, in accordance with RFCs 2822 and 3834.
1193 PH/47 Added authenticated_sender_force to the smtp transport.
1195 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1197 PH/49 Installed latest patch from the Sieve maintainer.
1199 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1200 was also set, the appendfile transport was unnecessarily scanning a
1201 directory of message files (e.g. for maildir delivery) to find the count
1202 of files (along with the size), even though it did not need this
1203 information. It now does the scan only if it needs to find either the
1204 size of the count of files.
1206 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1208 PH/52 Two bugs concerned with error handling when the smtp transport is
1211 (i) Exim was not creating retry information for temporary errors given
1212 for individual recipients after the DATA command when the smtp transport
1213 was used in LMTP mode. This meant that they could be retried too
1214 frequently, and not timed out correctly.
1216 (ii) Exim was setting the flag that allows error details to be returned
1217 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1218 recipients that were returned after the DATA command.
1220 PH/53 This is related to PH/52, but is more general: for any failing address,
1221 when detailed error information was permitted to be returned to the
1222 sender, but the error was temporary, then after the final timeout, only
1223 "retry timeout exceeded" was returned. Now it returns the full error as
1224 well as "retry timeout exceeded".
1226 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1227 do this, and (what is worse) MTAs that accept it.
1229 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1230 will now be deprecated.
1232 PH/56 New os.c-cygwin from the Cygwin maintainer.
1234 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1235 formats (previously only available in exim formats via -bpr, -bpru,
1236 and -bpra. Now also available in native and exiqgrep formats)
1238 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1239 with very large, slow to parse queues
1241 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1243 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1245 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1246 responses to authentication challenges, though it was showing the
1247 challenges; (ii) I've removed the CR characters from the debug output for
1250 PH/58 Allow for the insertion of a newline as well as a space when a string
1251 is turned into more than one encoded-word during RFC 2047 encoding. The
1252 Sieve code now uses this.
1254 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1255 data_4xx, lost_connection, tls_required.
1257 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1258 message was being sent as an SMTP response.
1260 PH/61 Add -l and -k options to exicyclog.
1262 PH/62 When verifying, if an address was redirected to one new address, so that
1263 verification continued, and the new address failed or deferred after
1264 having set something in $address_data, the value of $address_data was not
1265 passed back to the ACL. This was different to the case when no
1266 redirection occurred. The value is now passed back in both cases.
1268 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1269 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1270 use login_cap.h, so on its own it isn't the distinguishing feature. The
1271 new name refers directly to the setclassresources() function.
1273 PH/65 Added configuration files for NetBSD3.
1275 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1277 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1278 is preferred over IPv4.
1280 PH/68 The bounce_return_message and bounce_return_body options were not being
1281 honoured for bounces generated during the reception of non-SMTP messages.
1282 In particular, this applied to messages rejected by the ACL. This bug has
1283 been fixed. However, if bounce_return_message is true and bounce_return_
1284 body is false, the headers that are returned for a non-SMTP message
1285 include only those that have been read before the error was detected.
1286 (In the case of an ACL rejection, they have all been read.)
1288 PH/69 The HTML version of the specification is now built in a directory called
1289 spec_html instead of spec.html, because the latter looks like a path with
1290 a MIME-type, and this confuses some software.
1292 PH/70 Catch two compiler warnings in sieve.c.
1294 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1295 function verify_get_ident() calls ip_connect() to connect a socket, but
1296 if the "connect()" function timed out, ip_connect() used to close the
1297 socket. However, verify_get_ident() also closes the socket later, and in
1298 between Exim writes to the log, which may get opened at this point. When
1299 the socket was closed in ip_connect(), the log could get the same file
1300 descriptor number as the socket. This naturally causes chaos. The fix is
1301 not to close the socket in ip_connect(); the socket should be closed by
1302 the function that creates it. There was only one place in the code where
1303 this was missing, in the iplookup router, which I don't think anybody now
1304 uses, but I've fixed it anyway.
1306 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1307 well as to direct DNS lookups. Otherwise the handling of names in host
1308 lists is inconsistent and therefore confusing.
1314 PH/01 Two changes to the default runtime configuration:
1316 (1) Move the checks for relay_from_hosts and authenticated clients from
1317 after to before the (commented out) DNS black list checks.
1319 (2) Add control=submission to the relay_from_hosts and authenticated
1320 clients checks, on the grounds that messages accepted by these
1321 statements are most likely to be submissions.
1323 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1325 (1) Generate an error if the third argument for the ${prvs expansion is
1328 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1331 (3) Reset the variables that are obtained from the first argument of
1332 ${prvscheck and used in the second argument before leaving the code,
1333 because their memory is reclaimed, so using them afterwards may do
1336 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1337 one (it's much easier than Tom thought :-).
1339 (5) Because of (4), we can now allow for the use of $prvscheck_result
1340 inside the third argument.
1342 PH/03 For some reason, the default setting of PATH when running a command from
1343 a pipe transport was just "/usr/bin". I have changed it to
1346 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1347 anything to be listed in the output from -bV.
1349 PH/05 When a filter generated an autoreply, the entire To: header line was
1350 quoted in the delivery log line, like this:
1352 => >A.N.Other <ano@some.domain> <original@ddress> ...
1354 This has been changed so that it extracts the operative address. There
1355 may be more than one such address. If so, they are comma-separated, like
1358 => >ano@some.domain,ona@other.domain <original@ddress> ...
1360 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1361 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1362 not being looked up in the rDNS to get a host name, Exim was showing the
1363 IP address twice in Received: lines, even though the IP addresses were
1364 identical. For example:
1366 Received: from [1.2.3.4] (helo=[1.2.3.4])
1368 However, if the real host name was known, it was omitting the HELO data
1369 if it matched the actual IP address. This has been tidied up so that it
1370 doesn't show the same IP address twice.
1372 PH/07 When both +timestamp and +memory debugging was on, the value given by
1373 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1374 called by the debug printing, thereby overwriting the timestamp buffer.
1375 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1377 PH/08 When the original message was included in an autoreply transport, it
1378 always said "this is a copy of the message, including all the headers",
1379 even if body_only or headers_only was set. It now gives an appropriate
1382 PH/09 Applied a patch from the Sieve maintainer which:
1384 o fixes some comments
1385 o adds the (disabled) notify extension core
1386 o adds some debug output for the result of if/elsif tests
1387 o points to the current vacation draft in the documentation
1388 and documents the missing references header update
1392 o fixes a bug in processing the envelope test (when testing
1393 multiple envelope elements, the last element determinted the
1396 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1397 Electronic Mail") by including:
1399 Auto-submitted: auto-generated
1401 in the messages that it generates (bounce messages and others, such as
1402 warnings). In the case of bounce messages for non-SMTP mesages, there was
1403 also a typo: it was using "Auto_submitted" (underscore instead of
1404 hyphen). Since every message generated by Exim is necessarily in response
1405 to another message, thes have all been changed to:
1407 Auto-Submitted: auto-replied
1409 in accordance with these statements in the RFC:
1411 The auto-replied keyword:
1413 - SHOULD be used on messages sent in direct response to another
1414 message by an automatic process,
1416 - MUST NOT be used on manually-generated messages,
1418 - MAY be used on Delivery Status Notifications (DSNs) and Message
1419 Disposition Notifications (MDNs),
1421 - MUST NOT be used on messages generated by automatic or periodic
1422 processes, except for messages which are automatic responses to
1425 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1426 to the default Received: header definition.
1428 PH/12 Added log selector acl_warn_skipped (default on).
1430 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1431 variables because (a) they are in the wrong storage pool and (b) even if
1432 they were copied, it wouldn't work properly because of the caching.
1434 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1435 checking when decoding. Apparently there are clients that generate
1436 overlong encoded strings. Why am I not surprised?
1438 PH/15 If the first argument of "${if match_address" was not empty, but did not
1439 contain an "@" character, Exim crashed. Now it writes a panic log message
1440 and treats the condition as false.
1442 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1444 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1445 extension "envelope-auth". The code is finished and in agreement with
1446 other implementations, but there is no documentation so far and in fact,
1447 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1448 not changing the active code.
1450 Print executed "if" and "elsif" statements when debugging is used. This
1451 helps a great deal to understand what a filter does.
1453 Document more things not specified clearly in RFC3028. I had all this
1454 sorted out, when out of a sudden new issues came to my mind. Oops."
1456 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1459 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1460 canonical form (as documented). However, after a host name lookup from
1461 the IP address, check_host() was doing a simple string comparison with
1462 addresses acquired from the DNS when checking that the found name did
1463 have the original IP as one of its addresses. Since any found IPv6
1464 addresses are likely to be in abbreviated form, the comparison could
1465 fail. Luckily, there already exists a function for doing the comparison
1466 by converting both addresses to binary, so now that is used instead of
1467 the text comparison.
1469 PH/20 There was another similar case to PH/19, when a complete host name was
1470 given in a host list; looking up its IP address could give an abbreviated
1471 form, whereas the current host's name might or might not be abbreviated.
1472 The same fix has been applied.
1478 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1479 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1482 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1483 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1485 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1487 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1488 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1489 Also, for "Auto-Submitted", treat anything other than "no" as
1490 non-personal, in accordance with RFC 3834. (Previously it treated
1491 anything starting "auto-" as non-personal.)
1493 TF/01 The control=submission/name=... option had a problem with syntax
1494 errors if the name included a slash character. The /name= option
1495 now slurps the rest of the string, so it can include any characters
1496 but it must come last in the list of options (after /sender_retain
1499 PH/05 Some modifications to the interface to the fake nameserver for the new
1507 TK/01 Added the "success_on_redirect" address verification option. See
1508 NewStuff for rationale and an example.
1510 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1512 PH/02 Patch to exigrep to allow it to work on syslog lines.
1514 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1515 fread() to skip over the body file's header line, because in Cygwin the
1516 header line is locked and is inaccessible.
1518 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1519 co-exist for some time) to make it clear that it is the Exim ID that is
1520 referenced, not the Message-ID: header line.
1522 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1523 string_format() function, because snprintf() does not exist on all
1526 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1527 ${stat: expansion item.
1529 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1530 protocol synchronization error", to keep the pedants happy.
1532 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1533 well as for IRIX systems, when gcc is being used. See the host.c source
1536 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1538 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1541 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1542 transport and to the smtp transport in LMTP mode.
1544 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1546 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1547 run a filter in a subprocess. This could lead to confusion in subsequent
1548 lookups in the parent process. There should also be a search_tidyup() at
1549 the end of the subprocess.
1551 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1552 only if the host matched helo_try_verify_hosts, which caused the
1553 verification to occur when the EHLO/HELO command was issued. The ACL just
1554 tested the remembered result. Now, if a previous verification attempt has
1555 not happened, "verify = helo" does it there and then.
1557 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1559 TK/03 Fix log output including CR from clamd.
1561 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1562 exist provoked a memory error which could cause a segfault.
1564 PH/15 Installed PCRE 6.2
1566 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1568 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1569 of the problem. Specifically, suggested +O2 rather than +O1 for the
1572 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1574 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1575 record, the port was not correctly logged when the outgoing_port log
1576 selector was set (it logged the transort's default port).
1578 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1579 fallback_hosts, and "hosts" in the smtp transport.
1581 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1582 host errors such as "Connection refused".
1584 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1585 authentication with radiusclient 0.4.9:
1587 - Error returned from rc_read_config was caught wrongly
1588 - Username/password not passed on to radius server due to wrong length.
1590 The presumption is that some radiusclient API changes for 4.51/PH/17
1591 were not taken care of correctly. The code is still untested by me (my
1592 Linux distribution still has 0.3.2 of radiusclient), but it was
1593 contributed by a Radius user.
1595 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1596 expanding the "port" option of the smtp transport.
1598 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1599 while reading a MIME header. Thanks to Tom Hughes for a patch.
1601 PH/24 Include config.h inside local_scan.h so that configuration settings are
1604 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1605 that in an ACL for RCPT (for example), you can examine exactly what was
1608 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1609 commands, but it was not correctly comparing the address with the actual
1610 client host address. Thus, it would show the EHLO address in Received:
1611 header lines when this was not necessary.
1613 PH/27 Added the % operator to ${eval:}.
1615 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1616 it should be ignoring failures (because with -C, for example, it has lost
1617 privilege). It wasn't ignoring creation failures other than "already
1620 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1623 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1624 because an input line was too long, either on its own, or by virtue of
1625 too many continuations, the temporary file was not being removed, and the
1626 return code was incorrect.
1628 PH/31 Missing "BOOL" in function definition in filtertest.c.
1630 PH/32 Applied Sieve patches from the maintainer.
1632 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1634 PH/33 Added "verify = not_blind".
1636 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1637 Local/Makefile (with some defaults set). These are used in built scripts
1638 such as exicyclog, but they have never been used in the exim_install
1639 script (though there are many overriding facilities there). I have
1640 arranged that the exim_install script now takes note of these two
1643 PH/35 Installed configuration files for Dragonfly.
1645 PH/36 When a locally submitted message by a trusted user did not contain a
1646 From: header, and the sender address was obtained from -f or from an SMTP
1647 MAIL command, and the trusted user did not use -F to supply a sender
1648 name, $originator_name was incorrectly used when constructing a From:
1649 header. Furthermore, $originator_name was used for submission mode
1650 messages from external hosts without From: headers in a similar way,
1651 which is clearly wrong.
1653 PH/37 Added control=suppress_local_fixups.
1655 PH/38 When log_selector = +received_sender was set, and the addition of the
1656 sender made the log line's construction buffer exactly full, or one byte
1657 less than full, an overflow happened when the terminating "\n" was
1660 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1661 when the result of a list match is failure because a DNS lookup failed.
1663 PH/40 RM_COMMAND is now used in the building process.
1665 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1666 the "build-* directories that it finds.
1668 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1669 address in a domain literal was a prefix of an interface address.
1671 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1672 when verifying a sender address, unless rewrite_headers is false.
1674 PH/44 Wrote a long comment about why errors_to addresses are verified as
1675 recipients, not senders.
1677 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1678 the ratelimit ACL was added.
1680 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1682 PH/46 Added extra information about PostgreSQL errors to the error string.
1684 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1685 avoiding the need to install special zones in a real server. This is
1686 backwards compatible; if it can't find the fake resolver, it drops back.
1687 Thus, both old and new test suites can be run.
1689 TF/02 Added util/ratelimit.pl
1691 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1692 clock is set back in time.
1694 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1695 Candler <B.Candler@pobox.com>.
1697 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1698 OK for addresses that are the result of redirections.
1700 PH/48 A number of further additions for the benefit of the new test suite,
1701 including a fake gethostbyname() that interfaces to the fake DNS resolver
1704 TF/06 The fix for widen_domains has also been applied to qualify_single and
1705 search_parents which are the other dnslookup options that can cause
1708 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1711 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1713 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1714 service" if it encountered an MX record with an empty target hostname.
1715 The message is now "an MX or SRV record indicated no SMTP service".
1717 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1718 if the DNS of the sending site is misconfigured. This is quite a
1719 common situation. This change restores the behaviour of treating a
1720 helo verification defer as a failure.
1722 PH/51 If self=fail was set on a router, the bounce message did not include the
1723 actual error message.
1729 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1731 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1732 command itself ended in error, the underlying message about the transport
1733 filter timeout was being overwritten with the pipe command error. Now the
1734 underlying error message should be appended to the second error message.
1736 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1738 PH/02 Reduce the amount of output that "make" produces by default. Full output
1739 can still be requested.
1741 PH/03 The warning log line about a condition test deferring for a "warn" verb
1742 was being output only once per connection, rather than after each
1743 occurrence (because it was using the same function as for successful
1744 "warn" verbs). This seems wrong, so I have changed it.
1746 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1747 it should not have, which might have caused a crash in the right
1748 circumstances, but probably never did.
1750 PH/04 Installed a modified version of Tony Finch's patch to make submission
1751 mode fix the return path as well as the Sender: header line, and to
1752 add a /name= option so that you can make the user's friendly name appear
1755 TF/03 Added the control = fakedefer ACL modifier.
1757 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1758 Mark Lowes for thorough testing.
1760 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1762 TK/03 Merged latest SRS patch from Miles Wilton.
1764 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1765 with the definition in sysexits.h (which is #included earlier).
1766 Fortunately, Exim does not actually use EX_OK. The code used to try to
1767 preserve the sysexits.h value, by assumimg that macro definitions were
1768 scanned for macro replacements. I have been disabused of this notion,
1769 so now the code just undefines EX_OK before #including unistd.h.
1771 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1772 in the smtp transport. When a block could not be written in a single
1773 write() function, the timeout was being re-applied to each part-write.
1774 This seems wrong - if the receiver was accepting one byte at a time it
1775 would take for ever. The timeout is now adjusted when this happens. It
1776 doesn't have to be particularly precise.
1778 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1779 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1781 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1782 without a domain if the check to <postmaster@domain> fails.
1784 SC/01 Eximstats: added -xls and the ability to specify output files
1785 (patch written by Frank Heydlauf).
1787 SC/02 Eximstats: use FileHandles for outputing results.
1789 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1791 SC/04 Eximstats: fixed display of large numbers with -nvr option
1793 SC/05 Eximstats: fixed merging of reports with empty tables.
1795 SC/06 Eximstats: added the -include_original_destination flag
1797 SC/07 Eximstats: removed tabs and trailing whitespace.
1799 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1801 TK/06 MBOX spool code: Add real "From " MBOX separator line
1802 so the .eml file is really in mbox format (even though
1803 most programs do not really care). Patch from Alex Miller.
1805 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1806 The latter is generated from $received_to and is only set if the
1807 message has one envelope recipient. SA can use these headers,
1808 obviously out-of-the-box. Patch from Alex Miller.
1810 PH/08 The ${def test on a variable was returning false if the variable's
1811 value was "0", contrary to what the specification has always said!
1812 The result should be true unless the variable is empty.
1814 PH/09 The syntax error of a character other than { following "${if
1815 def:variable_name" (after optional whitespace) was not being diagnosed.
1816 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1817 accidental colon was present, for example, could give incorrect results.
1819 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1820 result is used (not including appendfile, where other changes are about
1823 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1824 This involved changing a lot of size variables from int to off_t. It
1825 should work with maildirs and everything.
1827 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1828 spamd dying while we are connected to it.
1830 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1833 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1834 function for BDB 4.3.
1836 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1838 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1839 the sources for PCRE have been re-arranged and more files are now
1842 PH/15 The code I had for printing potentially long long variables in PH/11
1843 above was not the best (it lost precision). The length of off_t variables
1844 is now inspected at build time, and an appropriate printing format (%ld
1845 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1846 to be "long long int" or "long int". This is needed for the internal
1847 formatting function string_vformat().
1849 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1850 the configuration file to be ":syslog", then the script "guesses" where
1851 the logs files are, rather than using the compiled in default. In our
1852 case the guess is not the same as the compiled default, so the script
1853 suddenly stopped working when I started to use syslog. The patch checks
1854 to see if log_file_path is "". If so, it attempts to read it from exim
1855 with no configuration file to get the compiled in version, before it
1856 falls back to the previous guessing code."
1858 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1859 implementing BATV in an Exim configuration. See NewStuff for the gory
1862 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1863 Makefile that are specific to HP-UX.
1865 PH/18 If the "use_postmaster" option was set for a recipient callout together
1866 with the "random" option, the postmaster address was used as the MAIL
1867 FROM address for the random test, but not for the subsequent recipient
1868 test. It is now used for both.
1870 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1871 patch removes a few documentation additions to RFC 3028, because the
1872 latest draft now contains them. It adds the new en;ascii-case comparator
1873 and a new error check for 8bit text in MIME parts. Comparator and
1874 require names are now matched exactly. I enabled the subaddress
1875 extension, but it is not well tested yet (read: it works for me)."
1877 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1878 rework some of the code of TK/09 above to avoid the hardwired use of
1879 "%lld" and "long long". Replaced the call to snprintf() with a call to
1882 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1883 records point to non-existent hosts", "retry timeout exceeded", and
1884 "retry time not reached for any host after a long failure period".
1886 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1887 experimental DomainKeys support:
1889 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1890 (2) On an error such as an illegally used "control", the wrong name for
1891 the control was given.
1893 These problems did NOT occur unless DomainKeys support was compiled.
1895 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1897 PH/24 Added ${if match_ip condition.
1899 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1900 databases so that it will be absolutely obvious if a crash occurs in the
1901 DB library. This is a regular occurrence (often caused by mis-matched
1904 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1905 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1906 picked up on a user's system that detects such things. There doesn't seem
1907 to be a gcc warning option for this - only an attribute that has to be
1908 put on the function's prototype. It seems that in Fedora Core 4 they have
1909 set this on a number of new functions. No doubt there will be more in due
1912 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1913 specify a transport. However, if an address that was verified by such a
1914 router was the subject of a callout, Exim crashed because it tried to
1915 read the rcpt_include_affixes from the non-existent transport. Now it
1916 just assumes that the setting of that option is false. This bug was
1917 introduced by 4.51/PH/31.
1919 PH/28 Changed -d+all to exclude +memory, because that information is very
1920 rarely of interest, but it makes the output a lot bigger. People tend to
1921 do -d+all out of habit.
1923 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1924 code in os-type was giving problems when libc.so lives in lib64, like on
1927 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1928 aren't the modern standard, and it seems that some systems' include files
1929 don't always have them. Exim was already checking for some of the newer
1930 ones like T_AAAA, and defining it itself. I've added checks for all the
1931 record types that Exim uses.
1933 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1934 not automatically generating a new one, as it is supposed to. This
1935 prevented TLS from working. If the file did exist, but contained invalid
1936 data, a new version was generated, as expected. It was only the case of a
1937 non-existent file that was broken.
1939 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1940 with a change in libdomainkeys > 0.64.
1942 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1943 from DNS. If the selector record carries the flag, it now has
1944 precedence over the domain-wide flag.
1946 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1948 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1949 the use of a port name that isn't defined in /etc/services) occurred, the
1950 message was deferred as in a normal delivery, and thus remained on the
1951 spool, instead of being failed because of the mua_wrapper setting. This
1952 is now fixed, and I tidied up some of the mua_wrapper messages at the
1955 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1956 the messages in a hash of arrays rather than using individual hashes.
1957 This is a bit cleaner and results in dramatic memory savings, albeit
1958 at a slight CPU cost.
1960 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1961 as requested by Marc Sherman.
1963 SC/10 Eximstats: added histograms for user specified patterns as requested
1966 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1968 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1969 fopen() in the content-scanning modules that did not already have it.
1975 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1976 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1978 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1980 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1982 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1983 to test Sieve filters that use "vacation".
1985 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1986 that changes the way the GnuTLS parameters are stored in the cache file.
1987 The new format can be generated externally. For backward compatibility,
1988 if the data in the cache doesn't make sense, Exim assumes it has read an
1989 old-format file, and it generates new data and writes a new file. This
1990 means that you can't go back to an older release without removing the
1993 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1994 work if there are any delivery delays because "one_time" forces the
1995 parent to be marked "delivered", so its unseen clone is never tried
1996 again. For this reason, Exim now forbids the simultaneous setting of
1999 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2000 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2001 entry if you want to know the details. The fix, however, neglected to
2002 consider the case when local delivery batching is involved. The test for
2003 "previously delivered" was not happening when checking to see if an
2004 address could be batched with a previous (undelivered) one; under
2005 certain circumstances this could lead to multiple deliveries to the same
2008 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2009 in its include files, and this causes problems building Exim.
2011 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2012 header_syntax) but Exim was just ignoring anything given after a slash.
2013 In particular, this caused confusion with an attempt to use "verify =
2014 reverse_host_lookup/defer_ok". An error is now given when options are
2015 supplied for verify items that do not have them. (Maybe reverse_host_
2016 lookup should have a defer_ok option, but that's a different point.)
2018 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2019 defined by RFC 821) to 2048, because there were problems with some AUTH
2020 commands, and RFC 1869 says the size should be increased for extended
2021 SMTP commands that take arguments.
2023 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2026 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2027 "unknown" error; now it says that the functionality isn't in the binary.
2029 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2030 an address' error message when a string expansion fails (syntax or
2031 whatever). Otherwise the password may appear in the log. Following change
2032 PH/42 below, there is no longer a chance of it appearing in a bounce
2035 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2037 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2038 of its addresses was ever tried. (Bugzilla bug #2.)
2040 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2041 the result incorrectly in the debug output. (It correctly added a newline
2042 to what was transported.)
2044 TF/01 Added $received_time.
2046 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2047 commented out examples of how to interface to a virus scanner and to
2048 SpamAssassin. Also added commented examples of av_scanner and
2049 spamd_address settings.
2051 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2052 and controls are allowed in which ACLs. There were a couple of minor
2053 errors. Some of the entries in the conditions table (which is a table of
2054 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2055 negation of where the condition IS allowed.
2057 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2059 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2060 header file does not have a version number, so I've had to invent a new
2061 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2062 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2063 radiusclient), but it was contributed by a Radius user.
2065 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2066 files or directories, for OpenSSL.
2068 PH/19 When an Exim process that is running as root has to create an Exim log
2069 file, it does so in a subprocess that runs as exim:exim so as to get the
2070 ownership right at creation (otherwise, other Exim processes might see
2071 the file with the wrong ownership). There was no test for failure of this
2072 fork() call, which would lead to the process getting stuck as it waited
2073 for a non-existent subprocess. Forks do occasionally fail when resources
2074 run out. I reviewed all the other calls to fork(); they all seem to check
2077 PH/20 When checking for unexpected SMTP input at connect time (before writing
2078 the banner), Exim was not dealing correctly with a non-positive return
2079 from the read() function. If the client had disconnected by this time,
2080 the result was a log entry for a synchronization error with an empty
2081 string after "input=" when read() returned zero. If read() returned -1
2082 (an event I could not check), uninitialized data bytes were printed.
2083 There were reports of junk text (parts of files, etc) appearing after
2086 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2088 PH/22 Added support for macro redefinition, and (re)definition in between
2089 driver and ACL definitions.
2091 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2092 forgetting to use the resulting value; it was using the unexpanded value.
2094 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2095 hadn't been configured. The fix is from Juergen Kreileder, who
2096 understands it better than I do:
2098 "Here's what I see happening with three configured cyrus_sasl
2099 authenticators configured (plain, login, cram-md5):
2101 On startup auth_cyrus_sasl_init() gets called for each of these.
2102 This means three calls to sasl_listmech() without a specified mech_list.
2103 => SASL tests which mechs of all available mechs actually work
2104 => three warnings about OTP not working
2105 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2107 With the patch, sasl_listmech() also gets called three times. But now
2108 SASL's mech_list option is set to the server_mech specified in the the
2109 authenticator. Or in other words, the answer from sasl_listmech()
2110 gets limited to just the mech you're testing for (which is different
2112 => the return list contains just 'plain' or 'login', 'cram-md5' or
2113 nothing depending on the value of ob->server_mech.
2115 I've just tested the patch: Authentication still works fine,
2116 unavailable mechs specified in the exim configuration are still
2117 caught, and the auth.log warnings about OTP are gone."
2119 PH/25 When debugging is enabled, the contents of the command line are added
2120 to the debugging output, even when log_selector=+arguments is not
2123 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2124 answer is "GNU", and only if the return is "GNU/something" is the answer
2127 PH/27 $acl_verify_message is now set immediately after the failure of a
2128 verification in an ACL, and so is available in subsequent modifiers. In
2129 particular, the message can be preserved by coding like this:
2131 warn !verify = sender
2132 set acl_m0 = $acl_verify_message
2134 Previously, $acl_verify_message was set only while expanding "message"
2135 and "log_message" when a very denied access.
2137 PH/28 Modified OS/os.c-Linux with
2139 -#ifndef OS_LOAD_AVERAGE
2140 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2142 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2143 nomenclature these days.)
2145 PH/29 Installed patch from the Sieve maintainer that adds the options
2146 sieve_useraddress and sieve_subaddress to the redirect router.
2148 PH/30 In these circumstances:
2149 . Two addresses routed to the same list of hosts;
2150 . First host does not offer TLS;
2151 . First host accepts first address;
2152 . First host gives temporary error to second address;
2153 . Second host offers TLS and a TLS session is established;
2154 . Second host accepts second address.
2155 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2156 and peerdn, if requested) that were in fact used only for the second
2159 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2160 attention to any local part prefix or suffix that was matched by the
2161 router that accepted the address. It now behaves in the same way as it
2162 does for delivery: the affixes are removed from the local part unless
2163 rcpt_include_affixes is set on the transport.
2165 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2166 timeout during the DATA phase of an incoming message.
2168 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2169 applied a patch sanctioned by the Sieve maintainer.
2171 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2172 the uid or gid is negative. A case of a negative gid caused this to be
2173 noticed. The fix allows for either to be negative.
2175 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2176 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2179 PH/36 The change PH/12 above was broken. Fixed it.
2181 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2182 the grounds that routing the same address twice would always produce the
2183 same answer. This might have been true once, but it is certainly no
2184 longer true now. Routing a child address may depend on the previous
2185 routing that produced that child. Some complicated redirection strategies
2186 went wrong when messages had multiple recipients, and made Exim's
2187 behaviour dependent on the order in which the addresses were given.
2189 I have moved the duplicate checking until after the routing is complete.
2190 Exim scans the addresses that are assigned to local and remote
2191 transports, and removes any duplicates. This means that more work will be
2192 done, as duplicates will always all be routed, but duplicates are
2193 presumably rare, so I don't expect this is of any significance.
2195 For deliveries to pipes, files, and autoreplies, the duplicate checking
2196 still happens during the routing process, since they are not going to be
2199 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2200 It corrects a timeout issue with spamd. This is Ian's comment: "The
2201 background is that sometimes spamd either never reads data from a
2202 connection it has accepted, or it never writes response data. The exiscan
2203 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2204 blindly assumes that writes won't block so it may never time out."
2206 PH/39 Allow G after quota size as well as K and M.
2208 PH/40 The value set for $authenticated_id in an authenticator may not contain
2209 binary zeroes or newlines because the value is written to log lines and
2210 to spool files. There was no check on this. Now the value is run through
2211 the string_printing() function so that such characters are converted to
2212 printable escape sequences.
2214 PH/41 $message_linecount is a new variable that contains the total number of
2215 lines in the message. Compare $body_linecount, which is the count for the
2218 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2219 bounce and delay warning messages, except in certain special cases, which
2222 (a) An SMTP error message from a remote host;
2223 (b) A message specified in a :fail: redirection;
2224 (c) A message specified in a "fail" command in a system filter;
2225 (d) A message specified in a FAIL return from the queryprogram router;
2226 (e) A message specified by the cannot_route_message router option.
2228 In these cases only, Exim does include the error details in bounce and
2229 warning messages. There are also a few cases where bland messages such
2230 as "unrouteable address" or "local delivery error" are given.
2232 PH/43 $value is now also set for the "else" part of a ${run expansion.
2234 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2235 being worked on, but at least Exim now implements the latest version to
2238 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2239 process to complete was treated as a delivery failure, a timeout while
2240 writing the message to the pipe was logged, but erroneously treated as a
2241 successful delivery. Such timeouts include transport filter timeouts. For
2242 consistency with the overall process timeout, these timeouts are now
2243 treated as errors, giving rise to delivery failures by default. However,
2244 there is now a new Boolean option for the pipe transport called
2245 timeout_defer, which, if set TRUE, converts the failures into defers for
2246 both kinds of timeout. A transport filter timeout is now identified in
2249 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2250 systems where "make" and "gmake" are different, calling "gmake" at top
2251 level broke things. I've arranged for the value of $(MAKE) to be passed
2252 from the Makefile to this script so that it can call the same version of
2256 A note about Exim versions 4.44 and 4.50
2257 ----------------------------------------
2259 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2260 changes of various kinds. As a consequence, a big documentation update was
2261 needed. This delayed the release for rather longer than seemed good, especially
2262 in the light of a couple of (minor) security issues. Therefore, the changes
2263 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2264 release. So 4.44 and 4.50 are in effect two different branches that both start
2267 I have left the 4.50 change log unchanged; it contains all the changes since
2268 4.43. The change log for 4.44 is below; many of its items are identical to
2269 those for 4.50. This seems to be the most sensible way to preserve the
2270 historical information.
2276 1. Minor wording change to the doc/README.SIEVE file.
2278 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2279 computation of the current number of files was incorrect.
2281 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2282 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2285 4. Give more explanation in the error message when the command for a transport
2286 filter fails to execute.
2288 5. There are several places where Exim runs a non-Exim command in a
2289 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2290 was being done only for the command run by the queryprogram router. It is
2291 now done for all such subprocesses. The other cases are: ${run, transport
2292 filters, and the commands run by the lmtp and pipe transports.
2294 6. Added CONFIGURE_GROUP build-time option.
2296 7. Some older OS have a limit of 256 on the maximum number of file
2297 descriptors. Exim was using setrlimit() to set 1000 as a large value
2298 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2299 systems. I've change it so that if it can't get 1000, it tries for 256.
2301 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2302 was an oversight, and furthermore, ever since the addition of extra
2303 controls (e.g. 4.43/32), the checks on when to allow different forms of
2304 "control" were broken. There should now be diagnostics for all cases when a
2305 control that does not make sense is encountered.
2307 9. Added the /retain_sender option to "control=submission".
2309 10. $recipients is now available in the predata ACL (oversight).
2311 11. Tidy the search cache before the fork to do a delivery from a message
2312 received from the command line. Otherwise the child will trigger a lookup
2313 failure and thereby defer the delivery if it tries to use (for example) a
2314 cached ldap connection that the parent has called unbind on.
2316 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2317 of $address_data from the recipient verification was clobbered by the
2318 sender verification.
2320 13. The value of address_data from a sender verification is now available in
2321 $sender_address_data in subsequent conditions in the ACL statement.
2323 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2325 15. Added a new option "connect=<time>" to callout options, to set a different
2328 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2329 was its contents. (It was OK if the option was not defined at all.)
2331 17. A "Completed" log line is now written for messages that are removed from
2332 the spool by the -Mrm option.
2334 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2335 information about exactly what failed.
2337 19. Added -dd to debug only the daemon process.
2339 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2340 handles timeouts, both on the server side and network timeouts. Renamed the
2341 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2343 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2344 It is now set to "smtps".
2346 22. $host_address is now set to the target address during the checking of
2347 ignore_target_hosts.
2349 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2350 being passed; this would have caused $sender_host_name to have been used if
2351 matching the list had actually called for a host name (not very likely,
2352 since this list is usually IP addresses). A host name is now passed as
2355 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2356 code that specifies a non-restarting handler (typically sigaction() in
2357 modern systems) in an attempt to fix a rare and obscure crash bug.
2359 25. Narrowed the window for a race in the daemon that could cause it to ignore
2360 SIGCHLD signals. This is not a major problem, because they are used only to
2361 wake it up if nothing else does.
2363 26. A malformed maildirsize file could cause Exim to calculate negative values
2364 for the mailbox size or file count. Odd effects could occur as a result.
2365 The maildirsize information is now recalculated if the size or filecount
2368 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2369 support for a long time. Removed HAVE_SYS_VFS_H.
2371 28. Installed the latest version of exipick from John Jetmore.
2373 29. In an address list, if the pattern was not a regular expression, an empty
2374 subject address (from a bounce message) matched only if the pattern was an
2375 empty string. Non-empty patterns were not even tested. This was the wrong
2376 because it is perfectly reasonable to use an empty address as part of a
2377 database query. An empty address is now tested by patterns that are
2378 lookups. However, all the other forms of pattern expect the subject to
2379 contain a local part and a domain, and therefore, for them, an empty
2380 address still always fails if the pattern is not itself empty.
2382 30. Exim went into a mad DNS loop when attempting to do a callout where the
2383 host was specified on an smtp transport, and looking it up yielded more
2384 than one IP address.
2386 31. Re-factored the code for checking spool and log partition space into a
2387 function that finds that data and another that does the check. The former
2388 is then used to implement four new variables: $spool_space, $log_space,
2389 $spool_inodes, and $log_inodes.
2391 32. The RFC2047 encoding function was originally intended for short strings
2392 such as real names; it was not keeping to the 75-character limit for
2393 encoded words that the RFC imposes. It now respects the limit, and
2394 generates multiple encoded words if necessary. To be on the safe side, I
2395 have increased the buffer size for the ${rfc2047: expansion operator from
2398 33. It is now permitted to omit both strings after an "if" condition; if the
2399 condition is true, the result is "true". As before, when the second string
2400 is omitted, a false condition yields an empty string. This makes it less
2401 cumbersome to write custom ACL and router conditions.
2403 34. Failure to deliver a bounce message always caused it to be frozen, even if
2404 there was an errors_to setting on the router. The errors_to setting is now
2407 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2408 canonical form (fully expanded) before being placed in
2409 $sender_host_address.
2411 36. The table in the code that translates DNS record types into text (T_A to
2412 "A" for instance) was missing entries for NS and CNAME. It is just possible
2413 that this could have caused confusion if both these types were looked up
2414 for the same domain, because the text type is used as part of Exim's
2415 per-process caching. But the chance of anyone hitting this buglet seems
2418 37. The dnsdb lookup has been extended in a number of ways.
2420 (1) There is a new type, "zns", which walks up the domain tree until it
2421 finds some nameserver records. It should be used with care.
2423 (2) There is a new type, "mxh", which is like "mx" except that it returns
2424 just the host names, not the priorities.
2426 (3) It is now possible to give a list of domains (or IP addresses) to be
2427 looked up. The behaviour when one of the lookups defers can be
2428 controlled by a keyword.
2430 (4) It is now possible to specify the separator character for use when
2431 multiple records are returned.
2433 38. The dnslists ACL condition has been extended: it is now possible to supply
2434 a list of IP addresses and/or domains to be looked up in a particular DNS
2437 39. Added log_selector=+queue_time_overall.
2439 40. When running the queue in the test harness, wait just a tad after forking a
2440 delivery process, to get repeatability of debugging output.
2442 41. Include certificate and key file names in error message when GnuTLS fails
2443 to set them up, because the GnuTLS error message doesn't include the name
2444 of the failing file when there is a problem reading it.
2446 42. Allow both -bf and -bF in the same test run.
2448 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2450 44. The "Exiscan patch" is now merged into the mainline Exim source.
2452 45. Sometimes the final signoff response after QUIT could fail to get
2453 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2454 < 0 before doing a fflush(). This bug looks as though it goes back to the
2455 introduction of TLS in release 3.20, but "sometimes" must have been rare
2456 because the tests only now provoked it.
2458 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2459 (this can affect the format of dates).
2461 47. exim_tidydb, when checking for the continued existence of a message for
2462 which it has found a message-specific retry record, was not finding
2463 messages that were in split spool directories. Consequently, it was
2464 deleting retry records that should have stayed in existence.
2466 48. Steve fixed some bugs in eximstats.
2468 49. The SPA authentication driver was not abandoning authentication and moving
2469 on to the next authenticator when an expansion was forced to fail,
2470 contradicting the general specification for all authenticators. Instead it
2471 was generating a temporary error. It now behaves as specified.
2473 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2474 (the order specifies the preference for clients). The order is now AES256,
2475 AES128, 3DES, ARCFOUR128.
2477 51. Small patch to Sieve code - explicitly set From: when generating an
2480 52. Exim crashed if a remote delivery caused a very long error message to be
2481 recorded - for instance if somebody sent an entire SpamAssassin report back
2482 as a large number of 550 error lines. This bug was coincidentally fixed by
2483 increasing the size of one of Exim's internal buffers (big_buffer) that
2484 happened as part of the Exiscan merge. However, to be on the safe side, I
2485 have made the code more robust (and fixed the comments that describe what
2488 53. Now that there can be additional text after "Completed" in log lines (if
2489 the queue_time_overall log selector is set), a one-byte patch to exigrep
2490 was needed to allow it to recognize "Completed" as not the last thing in
2493 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2494 patch that reportedly fixes this has been added. I am not expert enough to
2495 create a test for it. This is what the patch creator wrote:
2497 "I found a little strange behaviour of ldap code when working with
2498 Windows 2003 AD Domain, where users was placed in more than one
2499 Organization Units. When I tried to give exim partial DN, the exit code
2500 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2501 But simultaneously result of request was absolutely normal ldap result,
2502 so I produce this patch..."
2504 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2505 REFERENCE, so I have modified the code to exclude the patch when that macro
2508 55. Some experimental protocols are using DNS PTR records for new purposes. The
2509 keys for these records are domain names, not reversed IP addresses. The
2510 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2511 leaves it alone. Component reversal etc. now happens only for IP addresses.
2514 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2516 57. Double the size of the debug message buffer (to 2048) so that more of very
2517 long debug lines gets shown.
2519 58. The exicyclog utility now does better if the number of log files to keep
2520 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2522 59. Two changes related to the smtp_active_hostname option:
2524 (1) $smtp_active_hostname is now available as a variable.
2525 (2) The default for smtp_banner uses $smtp_active_hostname instead
2526 of $primary_hostname.
2528 60. The host_aton() function is supposed to be passed a string that is known
2529 to be a valid IP address. However, in the case of IPv6 addresses, it was
2530 not checking this. This is a hostage to fortune. Exim now panics and dies
2531 if the condition is not met. A case was found where this could be provoked
2532 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2533 components; fortuitously, this particular loophole had already been fixed
2534 by change 4.50/55 above.
2536 If there are any other similar loopholes, the new check in host_aton()
2537 itself should stop them being exploited. The report I received stated that
2538 data on the command line could provoke the exploit when Exim was running as
2539 exim, but did not say which command line option was involved. All I could
2540 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2541 running as the user.
2544 61. There was a buffer overflow vulnerability in the SPA authentication code
2545 (which came originally from the Samba project). I have added a test to the
2546 spa_base64_to_bits() function which I hope fixes it.
2549 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2550 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2552 63. The daemon start-up calls getloadavg() while still root for those OS that
2553 need the first call to be done as root, but it missed one case: when
2554 deliver_queue_load_max is set with deliver_drop_privilege. This is
2555 necessary for the benefit of the queue runner, because there is no re-exec
2556 when deliver_drop_privilege is set.
2558 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2559 This has been fixed.
2561 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2562 was in use, was not putting the data itself into the right store pool;
2563 consequently, it could be overwritten for a subsequent message in the same
2564 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2567 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2569 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2570 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2571 the function were treating the return as a boolean value, which happened to
2572 work because 0=false and not-0=true, but is not correct code.
2574 68. The host_aton() function was not handling scoped IPv6 addresses (those
2575 with, for example, "%eth0" on the end) correctly.
2577 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2578 negated items (that is, ~something) in unsigned ints. Some compilers
2579 apparently mutter when there is no cast.
2581 70. If an address verification called from an ACL failed, and did not produce a
2582 user-specific message (i.e. there was only a "system" message), nothing was
2583 put in $acl_verify_message. In this situation, it now puts the system
2586 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2587 session; change 4.31/43 added the unwanted input to the log line - except
2588 that it did not do this in the start of session case. It now does.
2590 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2591 This is wrong and can cause the other end to generate a synchronization
2592 error if it is another Exim or anything else that does the synchronization
2593 check. A QUIT command is no longer sent after a timeout.
2595 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2596 during host lookups.
2598 74. The defer_ok option of callout verification was not working if it was used
2599 when verifying addresses in header lines, that is, for this case:
2601 verify = header_sender/callout=defer_ok
2603 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2604 those file descriptors could be used for SMTP connections. If anything
2605 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2606 could be sent to the SMTP client, causing chaos. The daemon now opens
2607 stdin, stdout, and stderr to /dev/null when it puts itself into the
2610 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2611 log by default. The user can override this with suitable Perl magic.
2613 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2614 the log message when discard triggers, was not working for the DATA ACL or
2615 for the non-SMTP ACL.
2617 78. Error message wording change in sieve.c.
2619 79. If smtp_accept_max_per_host was set, the number of connections could be
2620 restricted to fewer than expected, because the daemon was trying to set up
2621 a new connection before checking whether the processes handling previous
2622 connections had finished. The check for completed processes is now done
2623 earlier. On busy systems, this bug wouldn't be noticed because something
2624 else would have woken the daemon, and it would have reaped the completed
2627 80. If a message was submitted locally by a user whose login name contained one
2628 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2629 It caused a spool format error. I have fixed the spool reading code. A
2630 related problem was that the "from" clause in the Received: line became
2631 illegal because of the space(s). It is now covered by ${quote_local_part.
2633 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2636 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2638 83. Patch from Sieve maintainer to fix unterminated string problem in
2639 "vacation" handling.
2641 84. Some minor changes to the Linux configuration files to help with other
2642 OS variants using glibc.
2644 85. One more patch for Sieve to update vacation handling to latest spec.
2647 ----------------------------------------------------
2648 See the note above about the 4.44 and 4.50 releases.
2649 ----------------------------------------------------
2655 1. Change 4.43/35 introduced a bug that caused file counts to be
2656 incorrectly computed when quota_filecount was set in an appendfile
2659 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2660 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2663 3. Give more explanation in the error message when the command for a transport
2664 filter fails to execute.
2666 4. There are several places where Exim runs a non-Exim command in a
2667 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2668 was being done only for the command run by the queryprogram router. It is
2669 now done for all such subprocesses. The other cases are: ${run, transport
2670 filters, and the commands run by the lmtp and pipe transports.
2672 5. Some older OS have a limit of 256 on the maximum number of file
2673 descriptors. Exim was using setrlimit() to set 1000 as a large value
2674 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2675 systems. I've change it so that if it can't get 1000, it tries for 256.
2677 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2678 was an oversight, and furthermore, ever since the addition of extra
2679 controls (e.g. 4.43/32), the checks on when to allow different forms of
2680 "control" were broken. There should now be diagnostics for all cases when a
2681 control that does not make sense is encountered.
2683 7. $recipients is now available in the predata ACL (oversight).
2685 8. Tidy the search cache before the fork to do a delivery from a message
2686 received from the command line. Otherwise the child will trigger a lookup
2687 failure and thereby defer the delivery if it tries to use (for example) a
2688 cached ldap connection that the parent has called unbind on.
2690 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2691 of $address_data from the recipient verification was clobbered by the
2692 sender verification.
2694 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2695 was its contents. (It was OK if the option was not defined at all.)
2697 11. A "Completed" log line is now written for messages that are removed from
2698 the spool by the -Mrm option.
2700 12. $host_address is now set to the target address during the checking of
2701 ignore_target_hosts.
2703 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2704 being passed; this would have caused $sender_host_name to have been used if
2705 matching the list had actually called for a host name (not very likely,
2706 since this list is usually IP addresses). A host name is now passed as
2709 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2710 code that specifies a non-restarting handler (typically sigaction() in
2711 modern systems) in an attempt to fix a rare and obscure crash bug.
2713 15. Narrowed the window for a race in the daemon that could cause it to ignore
2714 SIGCHLD signals. This is not a major problem, because they are used only to
2715 wake it up if nothing else does.
2717 16. A malformed maildirsize file could cause Exim to calculate negative values
2718 for the mailbox size or file count. Odd effects could occur as a result.
2719 The maildirsize information is now recalculated if the size or filecount
2722 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2723 support for a long time. Removed HAVE_SYS_VFS_H.
2725 18. Updated exipick to current release from John Jetmore.
2727 19. Allow an empty sender to be matched against a lookup in an address list.
2728 Previously the only cases considered were a regular expression, or an
2731 20. Exim went into a mad DNS lookup loop when doing a callout where the
2732 host was specified on the transport, if the DNS lookup yielded more than
2735 21. The RFC2047 encoding function was originally intended for short strings
2736 such as real names; it was not keeping to the 75-character limit for
2737 encoded words that the RFC imposes. It now respects the limit, and
2738 generates multiple encoded words if necessary. To be on the safe side, I
2739 have increased the buffer size for the ${rfc2047: expansion operator from
2742 22. Failure to deliver a bounce message always caused it to be frozen, even if
2743 there was an errors_to setting on the router. The errors_to setting is now
2746 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2747 canonical form (fully expanded) before being placed in
2748 $sender_host_address.
2750 24. Updated eximstats to version 1.33
2752 25. Include certificate and key file names in error message when GnuTLS fails
2753 to set them up, because the GnuTLS error message doesn't include the name
2754 of the failing file when there is a problem reading it.
2756 26. Expand error message when OpenSSL has problems setting up cert/key files.
2759 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2760 (this can affect the format of dates).
2762 28. exim_tidydb, when checking for the continued existence of a message for
2763 which it has found a message-specific retry record, was not finding
2764 messages that were in split spool directories. Consequently, it was
2765 deleting retry records that should have stayed in existence.
2767 29. eximstats updated to version 1.35
2768 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2769 1.35 - bugfix such that pie charts by volume are generated correctly
2771 30. The SPA authentication driver was not abandoning authentication and moving
2772 on to the next authenticator when an expansion was forced to fail,
2773 contradicting the general specification for all authenticators. Instead it
2774 was generating a temporary error. It now behaves as specified.
2776 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2777 (the order specifies the preference for clients). The order is now AES256,
2778 AES128, 3DES, ARCFOUR128.
2780 31. Small patch to Sieve code - explicitly set From: when generating an
2783 32. Exim crashed if a remote delivery caused a very long error message to be
2784 recorded - for instance if somebody sent an entire SpamAssassin report back
2785 as a large number of 550 error lines. This bug was coincidentally fixed by
2786 increasing the size of one of Exim's internal buffers (big_buffer) that
2787 happened as part of the Exiscan merge. However, to be on the safe side, I
2788 have made the code more robust (and fixed the comments that describe what
2791 33. Some experimental protocols are using DNS PTR records for new purposes. The
2792 keys for these records are domain names, not reversed IP addresses. The
2793 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2794 leaves it alone. Component reversal etc. now happens only for IP addresses.
2797 34. The host_aton() function is supposed to be passed a string that is known
2798 to be a valid IP address. However, in the case of IPv6 addresses, it was
2799 not checking this. This is a hostage to fortune. Exim now panics and dies
2800 if the condition is not met. A case was found where this could be provoked
2801 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2802 components; fortuitously, this particular loophole had already been fixed
2803 by change 4.50/55 or 4.44/33 above.
2805 If there are any other similar loopholes, the new check in host_aton()
2806 itself should stop them being exploited. The report I received stated that
2807 data on the command line could provoke the exploit when Exim was running as
2808 exim, but did not say which command line option was involved. All I could
2809 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2810 running as the user.
2813 35. There was a buffer overflow vulnerability in the SPA authentication code
2814 (which came originally from the Samba project). I have added a test to the
2815 spa_base64_to_bits() function which I hope fixes it.
2818 36. The daemon start-up calls getloadavg() while still root for those OS that
2819 need the first call to be done as root, but it missed one case: when
2820 deliver_queue_load_max is set with deliver_drop_privilege. This is
2821 necessary for the benefit of the queue runner, because there is no re-exec
2822 when deliver_drop_privilege is set.
2824 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2825 was in use, was not putting the data itself into the right store pool;
2826 consequently, it could be overwritten for a subsequent message in the same
2827 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2830 38. Sometimes the final signoff response after QUIT could fail to get
2831 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2832 < 0 before doing a fflush(). This bug looks as though it goes back to the
2833 introduction of TLS in release 3.20, but "sometimes" must have been rare
2834 because the tests only now provoked it.
2840 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2841 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2842 Now it returns an integer. A number of calls were still expecting a T/F
2843 return. Fortuitously, in all cases, the tests worked in OK situations,
2844 which is the norm. However, things would have gone wrong on any write
2845 failures on the smtp file descriptor. This function is used when sending
2846 messages over SMTP and also when doing verify callouts.
2848 2. When Exim is called to do synchronous delivery of a locally submitted
2849 message (the -odf or -odi options), it no longer closes stderr before doing
2852 3. Implemented the mua_wrapper option.
2854 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2856 5. Implemented the functions header_remove(), header_testname(),
2857 header_add_at_position(), and receive_remove_recipient(), and exported them
2860 6. If an ACL "warn" statement specified the addition of headers, Exim already
2861 inserted X-ACL-Warn: at the start if there was no header name. However, it
2862 was not making this test for the second and subsequent header lines if
2863 there were newlines in the string. This meant that an invalid header could
2864 be inserted if Exim was badly configured.
2866 7. Allow an ACL "warn" statement to add header lines at the start or after all
2867 the Received: headers, as well as at the end.
2869 8. Added the rcpt_4xx retry error code.
2871 9. Added postmaster_mailfrom=xxx to callout verification option.
2873 10. Added mailfrom=xxxx to the callout verification option, for verify=
2876 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2877 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2879 12. Inserted some casts to stop certain compilers warning when using pointer
2880 differences as field lengths or precisions in printf-type calls (mostly
2881 affecting debugging statements).
2883 13. Added optional readline() support for -be (dynamically loaded).
2885 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2886 same clock tick as a message's arrival, so that its received time was the
2887 same as the "first fail" time on the retry record, and that message
2888 remained on the queue past the ultimate address timeout, every queue runner
2889 would try a delivery (because it was past the ultimate address timeout) but
2890 after another failure, the ultimate address timeout, which should have then
2891 bounced the address, did not kick in. This was a "< instead of <=" error;
2892 in most cases the first failure would have been in the next clock tick
2893 after the received time, and all would be well.
2895 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2896 being recognized when the domain list was tested by the match_domain
2897 condition in an expansion string.
2899 16. Added the ${str2b64: operator.
2901 17. Exim was always calling setrlimit() to set a large limit for the number of
2902 processes, without checking whether the existing limit was already
2903 adequate. (It did check for the limit on file descriptors.) Furthermore,
2904 errors from getrlimit() and setrlimit() were being ignored. Now they are
2905 logged to the main and panic logs, but Exim does carry on, to try to do its
2906 job under whatever limits there are.
2908 18. Imported PCRE 5.0.
2910 19. Trivial typo in log message " temporarily refused connection" (the leading
2913 20. If the log selector return_path_on_delivery was set and an address was
2914 redirected to /dev/null, the delivery process crashed because it assumed
2915 that a return path would always be set for a "successful" delivery. In this
2916 case, the whole delivery is bypassed as an optimization, and therefore no
2919 21. Internal re-arrangement: the function for sending a challenge and reading
2920 a response while authentication was assuming a zero-terminated challenge
2921 string. It's now changed to take a pointer and a length, to allow for
2922 binary data in such strings.
2924 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2926 23. Exim was not respecting finduser_retries when seeking the login of the
2927 uid under which it was called; it was always trying 10 times. (The default
2928 setting of finduser_retries is zero.) Also, it was sleeping after the final
2929 failure, which is pointless.
2931 24. Implemented tls_on_connect_ports.
2933 25. Implemented acl_smtp_predata.
2935 26. If the domain in control=submission is set empty, Exim assumes that the
2936 authenticated id is a complete email address when it generates From: or
2937 Sender: header lines.
2939 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2940 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2941 chown and chgrp in /bin and hostname in /usr/bin.
2943 28. Exim was keeping the "process log" file open after each use, just as it
2944 does for the main log. This opens the possibility of it remaining open for
2945 long periods when the USR1 signal hits a daemon. Occasional processlog
2946 errors were reported, that could have been caused by this. Anyway, it seems
2947 much more sensible not to leave this file open at all, so that is what now
2950 29. The long-running daemon process does not normally write to the log once it
2951 has entered its main loop, and it closes the log before doing so. This is
2952 so that log files can straightforwardly be renamed and moved. However,
2953 there are a couple of unusual error situations where the daemon does write
2954 log entries, and I had neglected to close the log afterwards.
2956 30. The text of an SMTP error response that was received during a remote
2957 delivery was being truncated at 512 bytes. This is too short for some of
2958 the long messages that one sometimes sees. I've increased the limit to
2961 31. It is now possible to make retry rules that apply only when a message has a
2962 specific sender, in particular, an empty sender.
2964 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2965 it possible to be selective about when SMTP synchronization is enforced.
2967 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2969 32. Implemented hosts_connection_nolog.
2971 33. Added an ACL for QUIT.
2973 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2976 35. Added mailbox_size and mailbox_filecount to appendfile.
2978 36. Added control = no_multiline_responses to ACLs.
2980 37. There was a bug in the logic of the code that waits for the clock to tick
2981 in the case where the clock went backwards by a substantial amount such
2982 that the microsecond fraction of "now" was more than the microsecond
2983 fraction of "then" (but the whole seconds number was less).
2985 38. Added support for the libradius Radius client library this is found on
2986 FreeBSD (previously only the radiusclient library was supported).
2992 1. When certain lookups returned multiple values in the form name=value, the
2993 quoting of the values was not always being done properly. Specifically:
2994 (a) If the value started with a double quote, but contained no whitespace,
2996 (b) If the value contained whitespace other than a space character (i.e.
2997 tabs or newlines or carriage returns) it was not quoted.
2998 This fix has been applied to the mysql and pgsql lookups by writing a
2999 separate quoting function and calling it from the lookup code. The fix
3000 should probably also be applied to nisplus, ibase and oracle lookups, but
3001 since I cannot test any of those, I have not disturbed their existing code.
3003 2. A hit in the callout cache for a specific address caused a log line with no
3004 reason for rejecting RCPT. Now it says "Previous (cached) callout
3005 verification failure".
3007 3. There was an off-by-one bug in the queryprogram router. An over-long
3008 return line was truncated at 256 instead of 255 characters, thereby
3009 overflowing its buffer with the terminating zero. As well as fixing this, I
3010 have increased the buffer size to 1024 (and made a note to document this).
3012 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3013 when Exim is waiting for an SMTP response from a remote server, Exim
3014 restarts its select() call on the socket, thereby resetting its timeout.
3015 This is not a problem when such interrupts are rare. Somebody set up a cron
3016 job to run exiwhat every 2 minutes, which is less than the normal select()
3017 timeout (5 or 10 minutes). This meant that the select() timeout never
3018 kicked in because it was always reset. I have fixed this by comparing the
3019 time when an interrupt arrives with the time at the start of the first call
3020 to select(). If more time than the timeout has elapsed, the interrupt is
3021 treated as a timeout.
3023 5. Some internal re-factoring in preparation for the addition of Sieve
3024 extensions (by MH). In particular, the "personal" test is moved to a
3025 separate function, and given an option for scanning Cc: and Bcc: (which is
3026 not set for Exim filters).
3028 6. When Exim created an email address using the login of the caller as the
3029 local part (e.g. when creating a From: or Sender: header line), it was not
3030 quoting the local part when it contained special characters such as @.
3032 7. Installed new OpenBSD configuration files.
3034 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3035 try to make them clearer.
3037 9. Callout options, other than the timeout value, were being ignored when
3038 verifying sender addresses in header lines. For example, when using
3040 verify = header_sender/callout=no_cache
3042 the cache was (incorrectly) being used.
3044 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3045 only the Cygwin environment.
3047 11. When return_path_on_delivery was set as a log selector, if different remote
3048 addresses in the same message used different return paths and parallel
3049 remote delivery occurred, the wrong values would sometimes be logged.
3050 (Whenever a remote delivery process finished, the return path value from
3051 the most recently started remote delivery process was logged.)
3053 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3054 lines when AUTH and/or TLS are in use. This is the "received protocol"
3055 field. Exim used to use "asmtp" for authenticated SMTP, without any
3056 indication (in the protocol name) for TLS use. Now it follows the RFC and
3057 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3058 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3059 names appear in log lines as well as in Received: header lines.
3061 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3062 extensions, and comparison tests, and to fix some bugs.
3064 14. Changes to the "personal" filter test:
3066 (1) The test was buggy in that it was just doing the equivalent of
3067 "contains" tests on header lines. For example, if a user's address was
3068 anne@some.where, the "personal" test would incorrectly be true for
3070 To: susanne@some.where
3072 This test is now done by extracting each address from the header in turn,
3073 and checking the entire address. Other tests that are part of "personal"
3074 are now done using regular expressions (for example, to check local parts
3075 of addresses in From: header lines).
3077 (2) The list of non-personal local parts in From: addresses has been
3078 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3079 taken from the Sieve specification recommendations.
3081 (3) If the message contains any header line starting with "List-" it is
3082 treated as non-personal.
3084 (4) The test for "circular" in the Subject: header line has been removed
3085 because it now seems ill-conceived.
3087 15. Minor typos in src/EDITME comments corrected.
3089 16. Installed latest exipick from John Jetmore.
3091 17. If headers_add on a router specified a text string that was too long for
3092 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3093 of string_sprintf() is now avoided.
3095 18. $message_body_size was not set (it was always zero) when running the DATA
3096 ACL and the local_scan() function.
3098 19. For the "mail" command in an Exim filter, no default was being set for
3099 the once_repeat time, causing a random time value to be used if "once" was
3100 specified. (If the value happened to be <= 0, no repeat happened.) The
3101 default is now 0s, meaning "never repeat". The "vacation" command was OK
3102 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3103 (I found it when inspecting the code).
3105 20. There is now an overall timeout for performing a callout verification. It
3106 defaults to 4 times the callout timeout, which applies to individual SMTP
3107 commands during the callout. The overall timeout applies when there is more
3108 than one host that can be tried. The timeout is checked before trying the
3109 next host. This prevents very long delays if there are a large number of
3110 hosts and all are timing out (e.g. when the network connections are timing
3111 out). The value of the overall timeout can be changed by specifying an
3112 additional sub-option for "callout", called "maxwait". For example:
3114 verify = sender/callout=5s,maxwait=20s
3116 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3117 to the end before writing, but this should make it even safer).
3119 22. Exim was forgetting that it had advertised PIPELINING for the second and
3120 subsequent messages on an SMTP connection. It was also not resetting its
3121 memory on STARTTLS and an internal HELO.
3123 23. When Exim logs an SMTP synchronization error within a session, it now
3124 records whether PIPELINING has been advertised or not.
3126 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3127 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3128 rather than long int.
3130 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3132 26. Added the never_mail option to autoreply.
3138 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3139 crash if the getsockname() call failed; this can happen if a connection is
3140 closed very soon after it is established. The problem was simply in the
3141 order in which certain operations were done, causing Exim to try to write
3142 to the SMTP stream before it had set up the file descriptor. The bug has
3143 been fixed by making things happen in the correct order.
3149 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3150 before the connection was closed, thus losing the rejection response.
3152 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3153 some early Solaris releases, but causes trouble in current releases where
3154 socklen_t is defined.
3156 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3159 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3162 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3163 that releasing the top of it at the end releases what was used for sub-
3164 expansions (unless the block got too big). However, discard this block if
3165 the first thing is a variable or header, so that we can use its block when
3166 it is dynamic (useful for very large $message_headers, for example).
3168 6. Lookups now cache *every* query, not just the most recent. A new, separate
3169 store pool is used for this. It can be recovered when all lookup caches are
3170 flushed. Lookups now release memory at the end of their result strings.
3171 This has involved some general refactoring of the lookup sources.
3173 7. Some code has been added to the store_xxx() functions to reduce the amount
3174 of flapping under certain conditions.
3176 8. log_incoming_interface used to affect only the <= reception log lines. Now
3177 it causes the local interface and port to be added to several more SMTP log
3178 lines, for example "SMTP connection from", and rejection lines.
3180 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3182 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3184 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3185 could be overwritten at the end of the current message (or the start of a
3186 new message if it was set in a HELO ACL). The value is now preserved for
3187 the duration of the SMTP connection.
3189 12. If a transport had a headers_rewrite setting, and a matching header line
3190 contained an unqualified address, that address was qualified, even if it
3191 did not match any rewriting rules. The underlying bug was that the values
3192 of the flags that permit the existence of unqualified sender and recipient
3193 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3194 non-local messages, and by -bnq for local messages) were not being
3195 preserved with the message after it was received.
3197 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3198 "next input=" as part of the text comprising the host identity instead of
3199 the correct text. The code was using the same buffer for two different
3200 strings. However, depending on which order the printing function evaluated
3201 its arguments, the bug did not always show up. Under Linux, for example, my
3202 test suite worked just fine.
3204 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3205 doesn't work with some older versions of Perl. It has been changed to "my",
3206 which in any case is probably the better facility to use.
3208 15. A really picky compiler found some instances of statements for creating
3209 error messages that either had too many or two few arguments for the format
3212 16. The size of the buffer for calls to the DNS resolver has been increased
3213 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3214 for addresses that have a lot of PTR records. This alleviates a problem; it
3215 does not fully solve it.
3217 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3218 buffer now truncates the list and logs the incident, which is the same
3219 action as happens when Exim is looking up a host name and its aliases.
3220 Previously in this situation something unpredictable would happen;
3221 sometimes it was "internal error: store_reset failed".
3223 18. If a server dropped the connection unexpectedly when an Exim client was
3224 using GnuTLS and trying to read a response, the client delivery process
3225 crashed while trying to generate an error log message.
3227 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3228 string, for example:
3230 warn message = H1: something\nH2: something
3232 the text was added as a single header line from Exim's point of view
3233 though it ended up OK in the delivered message. However, searching for the
3234 second and subsequent header lines using $h_h2: did not work. This has been
3235 fixed. Similarly, if a system filter added multiple headers in this way,
3236 the routers could not see them.
3238 20. Expanded the error message when iplsearch is called with an invalid key to
3239 suggest using net-iplsearch in a host list.
3241 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3242 ACLs are no longer actually imposed (and a message to that effect is
3245 22. If a "gecos" field in a passwd entry contained escaped characters, in
3246 particular, if it contained a \" sequence, Exim got it wrong when building
3247 a From: or a Sender: header from that name. A second bug also caused
3248 incorrect handling when an unquoted " was present following a character
3249 that needed quoting.
3251 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3252 was not being matched caselessly.
3254 24. Arranged for all hyphens in the exim.8 source to be escaped with
3257 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3258 properly. Recipient callout cache records were still being keyed to include
3259 the sender, even when use_sender was set false. This led to far more
3260 callouts that were necessary. The sender is no longer included in the key
3261 when use_sender is false.
3263 26. Added "control = submission" modifier to ACLs.
3265 27. Added the ${base62d: operator to decode base 62 numbers.
3267 28. dnsdb lookups can now access SRV records.
3269 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3270 the configuration file.
3272 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3273 (-v) mode. This makes the output for a verbose queue run more intelligible.
3275 31. Added a use_postmaster feature to recipient callouts.
3277 32. Added the $body_zerocount variable, containing the number of binary zero
3278 bytes in the message body.
3280 33. The time of last modification of the "new" subdirectory is now used as the
3281 "mailbox time last read" when there is a quota error for a maildir
3284 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3286 35. Added +ignore_unknown as a special item in host lists.
3288 36. Code for decoding IPv6 addresses in host lists is now included, even if
3289 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3290 address was recognized as an IP address, but was then not correctly decoded
3291 into binary, causing unexpected and incorrect effects when compared with
3298 1. Very minor rewording of debugging text in manualroute to say "list of
3299 hosts" instead of "hostlist".
3301 2. If verify=header_syntax was set, and a header line with an unqualified
3302 address (no domain) and a large number of spaces between the end of the
3303 name and the colon was received, the reception process suffered a buffer
3304 overflow, and (when I tested it) crashed. This was caused by some obsolete
3305 code that should have been removed. The fix is to remove it!
3307 3. When running in the test harness, delay a bit after writing a bounce
3308 message to get a bit more predictability in the log output.
3310 4. Added a call to search_tidyup() just before forking a reception process. In
3311 theory, someone could use a lookup in the expansion of smtp_accept_max_
3312 per_host which, without the tidyup, could leave open a database connection.
3314 5. Added the variables $recipient_data and $sender_data which get set from a
3315 lookup success in an ACL "recipients" or "senders" condition, or a router
3316 "senders" option, similar to $domain_data and $local_part_data.
3318 6. Moved the writing of debug_print from before to after the "senders" test
3321 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3322 problems for message scanning, either using a data ACL, or using
3323 local_scan() because the Received: header was not generated till after they
3324 were called (in order to set the time as the time of reception completion).
3325 I have revised the way this works. The header is now generated after the
3326 body is received, but before the ACL or local_scan() are called. After they
3327 are run, the timestamp in the header is updated.
3333 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3334 before starting a queue runner without re-exec. This happened only when
3335 deliver_drop_privilege was set or when the Exim user was set to root. The
3336 effect of the bug was that timeouts during subsequent deliveries caused
3337 crashes instead of being properly handled. The handler is now left at its
3338 default (and expected) setting.
3340 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3341 message, again when deliver_drop_privilege is set or Exim is run as root.
3342 The bug described in (1) was not present in this case, but the tidying up
3343 of the other signals was missing. I have made the two cases consistent.
3345 3. The ignore_target_hosts setting on a manualroute router was being ignored
3346 for hosts that were looked up using the /MX notation.
3348 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3351 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3352 operated on the sender address. After changing the $sender_address to <>
3353 for the sender address verify, Exim was re-instated it as the original
3354 (before rewriting) address, but remembering that it had rewritten it, so it
3355 wasn't rewriting it again. This bug also had the effect of breaking the
3356 sender address verification caching when the sender address was rewritten.
3358 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3359 This has been changed so that if the ip literal address matches
3360 ignore_target_hosts, the router declines.
3362 7. Added expansion conditions match_domain, match_address, and match_local_
3363 part (NOT match_host).
3365 8. The placeholder for the Received: header didn't have a length field set.
3367 9. Added code to Exim itself and to exim_lock to test for a specific race
3368 condition that could lead to file corruption when using MBX delivery. The
3369 issue is with the lockfile that is created in /tmp. If this file is removed
3370 after a process has opened it but before that process has acquired a lock,
3371 there is the potential for a second process to recreate the file and also
3372 acquire a lock. This could lead to two Exim processes writing to the file
3373 at the same time. The added code performs the same test as UW imapd; it
3374 checks after acquiring the lock that its file descriptor still refers to
3375 the same named file.
3377 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3378 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3381 11. Added the smtp_active_hostname option. If used, this will typically be made
3382 to depend on the incoming interface address. Because $interface_address is
3383 not set up until the daemon has forked a reception process, error responses
3384 that can happen earlier (such as "too many connections") no longer contain
3387 12. If an expansion in a condition on a "warn" statement fails because a lookup
3388 defers, the "warn" statement is abandoned, and the next ACL statement is
3389 processed. Previously this caused the whole ACL to be aborted.
3391 13. Added the iplsearch lookup type.
3393 14. Added ident_timeout as a log selector.
3395 15. Added tls_certificate_verified as a log selector.
3397 16. Added a global option tls_require_ciphers (compare the smtp transport
3398 option of the same name). This controls incoming TLS connections.
3400 17. I finally figured out how to make tls_require_ciphers do a similar thing
3401 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3402 before starting the TLS session.
3404 18. Tabs are now shown as \t in -bP output.
3406 19. If the log selector return_path_on_delivery was set, Exim crashed when
3407 bouncing a message because it had too many Received: header lines.
3409 20. If two routers both had headers_remove settings, and the first one included
3410 a superfluous trailing colon, the final name in the first list and the
3411 first name in the second list were incorrectly joined into one item (with a
3412 colon in the middle).
3418 1. Added -C and -D options to the exinext utility, mainly to make it easier
3419 to include in the automated testing, but these could be helpful when
3420 multiple configurations are in use.
3422 2. The exinext utility was not formatting the output nicely when there was
3423 an alternate port involved in the retry record key, nor when there was a
3424 message id as well (for retries that were specific to a specific message
3425 and a specific host). It was also confused by IPv6 addresses, because of
3426 the additional colons they contain. I have fixed the IPv4 problem, and
3427 patched it up to do a reasonable job for IPv6.
3429 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3430 delivery, the log line now contains "pipelined" if PIPELINING was used.
3432 4. An SMTP transport process used to panic and die if the bind() call to set
3433 an explicit outgoing interface failed. This has been changed; it is now
3434 treated in the same way as a connect() failure.
3436 5. A reference to $sender_host_name in the part of a conditional expansion
3437 that was being skipped was still causing a DNS lookup. This no longer
3440 6. The def: expansion condition was not recognizing references to header lines
3441 that used bh_ and bheader_.
3443 7. Added the _cache feature to named lists.
3445 8. The code for checking quota_filecount in the appendfile transport was
3446 allowing one more file than it should have been.
3448 9. For compatibility with Sendmail, the command line option
3456 and sets the incoming protocol and host name (for trusted callers). The
3457 host name and its colon can be omitted when only the protocol is to be set.
3458 Note the Exim already has two private options, -pd and -ps, that refer to
3459 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3460 "s", but I don't think that's a major issue.
3462 10. A number of refactoring changes to the code, none of which should affect
3465 (a) The number of logging options was getting close to filling up the
3466 32-bit word that was used as a bit map. I have split them into two classes:
3467 those that are passed in the argument to log_write(), and those that are
3468 only ever tested independently outside of that function. These are now in
3469 separate 32-bit words, so there is plenty of room for expansion again.
3470 There is no change in the user interface or the logging behaviour.
3472 (b) When building, for example, log lines, the code previously used a
3473 macro that called string_cat() twice, in order to add two strings. This is
3474 not really sufficiently general. Furthermore, there was one instance where
3475 it was actually wrong because one of the argument was used twice, and in
3476 one call a function was used. (As it happened, calling the function twice
3477 did not affect the overall behaviour.) The macro has been replaced by a
3478 function that can join an arbitrary number of extra strings onto a growing
3481 (c) The code for expansion conditions now uses a table and a binary chop
3482 instead of a serial search (which was left over from when there were very
3483 few conditions). Also, it now recognizes conditions like "pam" even when
3484 the relevant support is not compiled in: a suitably worded error message is
3485 given if an attempt is made to use such a condition.
3487 11. Added ${time_interval:xxxxx}.
3489 12. A bug was causing one of the ddress fields not to be passed back correctly
3490 from remote delivery subprocesses. The field in question was not being
3491 subsequently used, so this caused to problems in practice.
3493 13. Added new log selectors queue_time and deliver_time.
3495 14. Might have fixed a bug in maildirsizefile handling that threw up
3496 "unexpected character" debug warnings, and recalculated the data
3497 unnecessarily. In any case, I expanded the warning message to give more
3500 15. Added the message "Restricted characters in address" to the statements in
3501 the default ACL that block characters like @ and % in local parts.
3503 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3504 Three changes have been made:
3506 (a) There was a serious bug; a negative response to MAIL caused the whole
3507 recipient domain to be cached as invalid, thereby blocking all messages
3508 to all local parts at the same domain, from all senders. This bug has
3509 been fixed. The domain is no longer cached after a negative response to
3510 MAIL if the sender used is not empty.
3512 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3515 (c) A new callout option, "use_sender" has been added for people who want
3516 the modified behaviour.
3522 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3525 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3526 indeed breaks things for older releases.
3528 3. Added additional logging to the case where there is a problem reading data
3529 from a filter that is running in a subprocess using a pipe, in order to
3530 try to track down a specific problem.
3532 4. Testing facility fudge: when running in the test harness and attempting
3533 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3534 getting "No route to host". Convert this to a timeout.
3536 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3539 6. Some OS don't have socklen_t but use size_t instead. This affects the
3540 fifth argument of getsockopt() amongst other things. This is now
3541 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3542 can be set for individual OS. I have set it for SunOS5, OSF1, and
3543 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3544 some earlier ones do not.
3546 7. Change 4.30/15 was not doing the test caselessly.
3548 8. The standard form for an IPv6 address literal was being rejected by address
3549 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3550 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3551 this, as well as the form without the "IPv6" on the front (but only when
3552 address literals are enabled, of course).
3554 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3556 10. Exim crashed if a message with an empty sender address specified by -f
3557 encountered a router with an errors_to setting. This could be provoked only
3558 by a command such as
3562 where an empty string was supplied; "<>" did not hit this bug.
3564 11. Installed PCRE release 4.5.
3566 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3567 remained set. It is now erased.
3569 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3570 times from message ids (which are base 36 rather than the normal 62).
3572 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3573 were being counted as actual protocol errors, and logged if the log
3574 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3575 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3576 and DATA following a set of rejected RCPTs do not count as protocol errors.
3577 In other words, Exim assumes they were pipelined, though this may not
3578 actually be the case. Of course, in all cases the client gets an
3579 appropriate error code.
3581 15. If a lookup fails in an ACL condition, a message about the failure may
3582 be available; it is used if testing the ACL cannot continue, because most
3583 such messages specify what the cause of the deferral is. However, some
3584 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3585 that caused an old message to be retained and used if a later statement
3586 caused a defer, replacing the real cause of the deferral.
3588 16. If an IP address had so many PTR records that the DNS lookup buffer
3589 was not large enough to hold them, Exim could crash while trying to process
3590 the truncated data. It now detects and logs this case.
3592 17. Further to 4.21/58, another change has been made: if (and only if) the
3593 first line of a message (the first header line) ends with CRLF, a bare LF
3594 in a subsequent header line has a space inserted after it, so as not to
3595 terminate the header.
3597 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3598 unnecessarily, used atoi() instead of strtol(), and didn't check the
3599 termination when getting file sizes from file names by regex.
3601 19. Completely re-implemented the support for maildirsize files, in the light
3602 of a number of problems with the previous contributed implementation
3603 (4.30/29). In particular:
3605 . If the quota is zero, the maildirsize file is maintained, but no quota is
3608 . If the maildir directory does not exist, it is created before any attempt
3609 to write a maildirsize file.
3611 . The quota value in the file is just a cache; if the quota is changed in
3612 the transport, the new value overrides.
3614 . A regular expression is available for excluding directories from the
3617 20. The autoreply transport checks the characters in options that define the
3618 message's headers; it allows continued headers, but it was checking with
3619 isspace() after an embedded newline instead of explicitly looking for a
3622 21. If all the "regular" hosts to which an address was routed had passed their
3623 expiry times, and had not reached their retry times, the address was
3624 bounced, even if fallback hosts were defined. Now Exim should go on to try
3627 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3628 equivalent code in the SMTP transport. Some hosts send humungous responses
3629 to HELO/EHLO, more than 1024 it seems.
3631 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3632 gives compiler warnings in some environments. I've now done it "properly",
3635 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3636 (because of problems with the built-in one) was declared to return uschar *
3637 instead of char *, causing compiler failure.
3639 25. Fixed a file descriptor leak when processing alias/forward files.
3641 26. Fixed a minor format string issue in dbfn.c.
3643 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3645 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3646 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3649 29. When a sender address is verified, it is cached, to save repeating the test
3650 when there is more than one recipient in a message. However, when the
3651 verification involves a callout, it is possible for different callout
3652 options to be set for different recipients. It is too complicated to keep
3653 track of this in the cache, so now Exim always runs a verification when a
3654 callout is required, relying on the callout cache for the optimization.
3655 The overhead is duplication of the address routing, but this should not be
3658 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3659 to be verified with callout=postmaster, and the main callout worked but the
3660 postmaster check failed, the verification correctly failed. However, if a
3661 subsequent RCPT command asked for sender verification *without* the
3662 postmaster check, incorrect caching caused this verification also to fail,
3665 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3666 it was not caching the DNS options (qualify_single, search_parents) that
3667 were used when the lookup failed. A subsequent lookup with different
3668 options therefore always gave the same answer, though there were cases
3669 where it should not have. (Example: a "domains = !$mx_any" option on a
3670 dnslookup router: the "domains" option is always processed without any
3671 widening, but the router might have qualify_single set.) Now Exim uses the
3672 cached value only when the same options are set.
3674 32. Added John Jetmore's "exipick" utility to the distribution.
3676 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3677 than a timeout (e.g. a certificate is required, and is not provided), an
3678 Exim server now closes the connection immediately. Previously it waited for
3679 the client to close - but if the client is SSL, it seems that they each
3680 wait for each other, leading to a delay before one of them times out.
3682 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3683 maintained 0.8.x compatibility because I don't think many are using it, and
3684 it is clearly obsolete.
3686 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3689 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3690 client certificate was expired. A simple patch fixes this, though I don't
3691 understand the full logic of why the verify callback is called multiple
3694 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3695 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3696 which causes problems with some clients (such as the Certicom SSL Plus
3697 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3698 disables the coutermeasure allowing Eudora to connect."
3700 38. Exim was not checking that a write() to a log file succeeded. This could
3701 lead to Bad Things if a log got too big, in particular if it hit a file
3702 size limit. Exim now panics and dies if it cannot write to a log file, just
3703 as it does if it cannot open a log file.
3705 39. Modified OS/Makefile-Linux so that it now contains
3707 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3709 The two -D definitions ensure that Exim is compiled with large file
3710 support, which makes it possible to handle log files that are bigger than
3713 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3714 instance) a domain was checked against a named list that involved a lookup,
3715 causing $domain_data to be set, then another domain was checked against the
3716 same list, then the first domain was re-checked, the value of $domain_data
3717 after the final check could be wrong. In particular, if the second check
3718 failed, it could be set empty. This bug probably also applied to
3721 41. The strip_trailing_dot option was not being applied to the address given
3722 with the -f command-line option.
3724 42. The code for reading a message's header from the spool was incrementing
3725 $received_count, but never initializing it. This meant that the value was
3726 incorrect (doubled) while delivering a message in the same process in which
3727 it was received. In the most common configuration of Exim, this never
3728 happens - a fresh exec is done - but it can happen when
3729 deliver_drop_privilege is set.
3731 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3732 it now includes up to 150 characters of the unexpected data in the log
3735 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3736 and building data strings. The size of both of these buffers was 10 000
3737 bytes - far larger than anybody would *ever* want, thought I. Needless to
3738 say, somebody hit the limit. I have increased the maximum line length to
3739 20 000 and the maximum data length of concatenated lines to 100 000. I have
3740 also fixed two bugs, because there was no checking on these buffers. Tsk,
3741 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3742 buffer is too small.
3744 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3745 lsearch lookups. Now it does.
3747 46. When parsing a route_list item in a manualroute router, a fixed-length
3748 buffer was used for the list of hosts. I made this 1024 bytes long,
3749 thinking that nobody would ever have a list of hosts that long. Wrong.
3750 Somebody had a whole pile of complicated expansion conditions, and the
3751 string was silently truncated, leading to an expansion error. It turns out
3752 that it is easier to change to an unlimited length (owing to other changes
3753 that have happened since this code was originally written) than to build
3754 structure for giving a limitation error. The length of the item that
3755 expands into the list of hosts is now unlimited.
3757 47. The lsearch lookup could not handle data where the length of text line was
3758 more than 4095 characters. Such lines were truncated, leading to shortened
3759 data being returned. It should now handle lines of any length.
3761 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3762 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3765 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3766 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3767 no longer happens in comment lines. A list of replacements is now placed
3768 at the head of all of the source files, except those whose only change is
3769 to replace PERL_COMMAND in the very first #! line.
3771 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3772 messages on the queue, with a bottom-up merge sort, using code contributed
3773 by Michael Haardt. This should make operations like -bp somewhat faster on
3774 large queues. It won't affect queue runners, except when queue_run_in_order
3777 51. Installed eximstats 1.31 in the distribution.
3779 52. Added support for SRV lookups to the dnslookup router.
3781 53. If an ACL referred to $message_body or $message_body_end, the value was not
3782 reset for any messages that followed in the same SMTP session.
3784 54. The store-handling optimization for building very long strings was not
3785 differentiating between the different store pools. I don't think this
3786 actually made any difference in practice, but I've tidied it.
3788 55. While running the routers to verify a sender address, $sender_address
3789 was still set to the sender address. This is wrong, because when routing to
3790 send a bounce to the sender, it would be empty. Therefore, I have changed
3791 it so that, while verifying a sender address, $sender_address is set to <>.
3792 (There is no change to what happens when verifying a recipient address.)
3794 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3795 target A or AAAA records (if not already returned) without resetting the
3796 qualify_single or search_parents options of the DNS resolver. These are
3797 inappropriate in this case because the targets of MX and SRV records must
3798 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3799 target that, when qualified, matched something in the local domain. These
3800 two options are now turned off when doing these lookups.
3802 57. It seems that at least some releases of Reiserfs (which does not have the
3803 concept of a fixed number of inodes) returns zero and not -1 for the
3804 number of available inodes. This interacted badly with check_spool_inodes,
3805 which assumed that -1 was the "no such thing" setting. What I have done is
3806 to check that the total number of inodes is greater than zero before doing
3807 the test of how many are available.
3809 58. When a "warn" ACL statement has a log_message modifier, the message is
3810 remembered, and not repeated. This is to avoid a lot of repetition when a
3811 message has many recipients that cause the same warning to be written.
3812 Howewer, Exim was preserving the list of already written lines for an
3813 entire SMTP session, which doesn't seem right. The memory is now reset if a
3814 new message is started.
3816 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3817 debugging output unless log_rewrite was also set.
3819 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3820 of (int)(handle) when we know that handle contains (void *)(-1).
3822 61. The Exim daemon panic-logs an error return when it closes the incoming
3823 connection. However "connection reset by peer" seems to be common, and
3824 isn't really an error worthy of noting specially, so that particular error
3827 62. When Exim is trying to find all the local interfaces, it used to panic and
3828 die if the ioctl to get the interface flags failed. However, it seems that
3829 on at least one OS (Solaris 9) it is possible to have an interface that is
3830 included in the list of interfaces, but for which you get a failure error
3831 for this call. This happens when the interface is not "plumbed" into a
3832 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3833 failure of the "get flags" call assumes that the interface is down.
3835 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3836 makes life easier for people who are doing arithmetic on fields extracted
3837 from dates, where you often get leading zeros that should not be
3838 interpreted as octal.
3840 64. Added qualify_domain to the redirect router, to override the global
3843 65. If a pathologically long header line contained very many addresses (the
3844 report of this problem mentioned 10 000) and each of them was rewritten,
3845 Exim could use up a very large amount of memory. (It kept on making new
3846 copies of the header line as it rewrote, and never released the old ones.)
3847 At the expense of a bit more processing, the header rewriting function has
3848 been changed so that it no longer eats memory in this way.
3850 66. The generation of the Received: header has been moved from the time that a
3851 message starts to be received, to the time that it finishes. The timestamp
3852 in the Received: header should now be very close to that of the <= log
3853 line. There are two side-effects of this change:
3855 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3856 logged header lines no longer include the local Received: line, because
3857 it has not yet been created. The same applies to a copy of the message
3858 that is returned to a non-SMTP sender when a message is rejected.
3860 (b) When a filter file is tested using -bf, no additional Received: header
3861 is added to the test message. After some thought, I decided that this
3864 This change does not affect the value of $received_for. It is still set
3865 after address rewriting, but before local_scan() is called.
3867 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3869 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3870 gave an unhelpful panic error message, and a defer error. I have managed to
3871 change this behaviour so that it now rejects any supplied certificate,
3872 which seems right, as the list of acceptable certificates is empty.
3874 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3875 gave an unhelpful defer error. I have not managed to make this reject any
3876 supplied certificates, but the error message it gives is "no certificate
3877 supplied", which is not helpful.
3879 70. exigrep's output now also includes lines that are not associated with any
3880 message, but which match the given pattern. Implemented by a patch from
3881 Martin Sluka, which also tidied up the Perl a bit.
3883 71. Recipient callout verification, like sender verification, was using <> in
3884 the MAIL FROM command. This isn't really the right thing, since the actual
3885 sender may affect whether the remote host accepts the recipient or not. I
3886 have changed it to use the actual sender in the callout; this means that
3887 the cache record is now keyed on a recipient/sender pair, not just the
3888 recipient address. There doesn't seem to be a real danger of callout loops,
3889 since a callout by the remote host to check the sender would use <>.
3890 [SEE ABOVE: changed after hitting problems.]
3892 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3893 temporary errors. However, in the case of such a code being given after
3894 the end of a data transmission (i.e. after ".") Exim was failing to write
3895 a retry record for the message. (Yes, there was some broken host that was
3896 actually sending 8xx at this point.)
3898 73. An unknown lookup type in a host list could cause Exim to panic-die when
3899 the list was checked. (An example that provoked this was putting <; in the
3900 middle of a list instead of at the start.) If this happened during a DATA
3901 ACL check, a -D file could be left lying around. This kind of configuration
3902 error no longer causes Exim to die; instead it causes a defer errror. The
3903 incident is still logged to the main and panic logs.
3905 74. Buglet left over from Exim 3 conversion. The message "too many messages
3906 in one connection" was written to the rejectlog but not the mainlog, except
3907 when address rewriting (yes!) was being logged.
3909 75. Added write_rejectlog option.
3911 76. When a system filter was run not as root (that is, when system_filter_user
3912 was set), the values of the $n variables were not being returned to the
3913 main process; thus, they were not subsequently available in the $sn
3916 77. Added +return_path_on_delivery log selector.
3918 78. A connection timeout was being treated differently from recipients deferred
3919 when testing hosts_max_try with a message that was older than the host's
3920 retry timeout. (The host should not be counted, thus allowing all hosts to
3921 be tried at least once before bouncing.) This may have been the cause of an
3922 occasionally reported bug whereby a message would remain on the queue
3923 longer than the retry timeout, but would be bounced if a delivery was
3924 forced. I say "may" because I never totally pinned down the problem;
3925 setting up timeout/retry tests is difficult. See also the next item.
3927 79. The ultimate address timeout was not being applied to errors that involved
3928 a combination of host plus message (for example, a timeout on a MAIL
3929 command). When an address resolved to a number of possible hosts, and they
3930 were not all tried for each delivery (e.g. because of hosts_max_try), a
3931 message could remain on the queue longer than the retry timeout.
3933 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3936 81. Fixed an obscure SMTP outgoing bug which required at least the following
3937 conditions: (a) there was another message waiting for the same server;
3938 (b) the server returned 5xx to all RCPT commands in the first message so
3939 that the message was not completed; (c) the server dropped the connection
3940 or gave a negative response to the RSET that Exim sends to abort the
3941 transaction. The observed case was a dropped connection after DATA that had
3942 been sent in pipelining mode. That is, the server had advertised PIPELINING
3943 but was not implementing it correctly. The effect of the bug was incorrect
3944 behaviour, such as trying another host, and this could lead to a crash.
3950 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3951 and daemon.c were passed as pointers to ints; they should have been
3952 pointers to socklen_t variables (which are typically unsigned ints).
3954 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3957 3. Fixed a really odd bug that affected only the testing scheme; patching a
3958 certain fixed string in the binary changed the value of another string that
3959 happened to be identical to the end of the original first string.
3961 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3962 name", it returns that address as the IP address. On some operating
3963 systems (e.g. Solaris), it also passes back the IP address string as the
3964 "host name". However, on others (e.g. Linux), it passes back an empty
3965 string. Exim wasn't checking for this, and was changing the host name to an
3966 empty string, assuming it had been canonicized.
3968 5. Although rare, it is permitted to have more than one PTR record for a given
3969 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3970 all the names associated with an address, because they do in Solaris.
3971 However, it seems that they do not in Linux for data that comes from the
3972 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3973 I found this out when I moved to a new Linux workstation and tried to run
3974 the Exim test suite.
3976 To get round this problem I have changed the code so that it now does its
3977 own call to the DNS to look up PTR records when searching for a host name.
3978 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3979 addresses that are only in /etc/hosts are still found.
3981 This behaviour is, however, controlled by an option called host_lookup_
3982 order, which defaults to "bydns:byaddr". If people want to use the other
3983 order, or indeed, just use one or the other means of lookup, they can
3984 specify it in this variable.
3986 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3987 some operating systems, this comes back from gethostbyaddr() as an empty
3988 string, and this is what Exim used to test for. However, it seems that in
3989 other systems, "." is yielded. Exim now tests for this case too.
3991 7. The values of check_spool_space and check_log_space are now held internally
3992 as a number of kilobytes instead of an absolute number of bytes. If a
3993 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3994 kilobyte. This means that much larger values can be stored.
3996 8. Exim monitor: an attempt to get the action menu when not actually pointing
3997 at a message produces an empty menu entitled "No message selected". This
3998 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3999 no entries in it ("Shell widget menu has zero width and/or height"). So I
4000 have added a single, blank menu entry in this case.
4002 9. Added ${quote_local_part.
4004 10. MIME decoding is now applied to the contents of Subject: header lines when
4007 11. Now that a reference to $sender_host_address automatically causes a reverse
4008 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4009 host lookup before query-style lookups in lists that might use this
4010 variable. This has therefore been abolished, and the "net-" prefix is no
4011 longer necessary for query-style lookups.
4013 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4014 have been a typo for LFLAGS, so it has been changed.
4016 13. The install script calls Exim with "-C /dev/null" in order to find the
4017 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4018 to be output. Howeve, since Exim outputs its version number before the
4019 error, it didn't break the script. It just looked ugly. I fixed this by
4020 always allowing "-C /dev/null" if the caller is root.
4022 14. Ignore overlarge ACL variable number when reading spool file - insurance
4023 against a later release with more variables having written the file.
4025 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4026 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4027 this, as well as the form without the "IPv6" on the front.
4029 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4030 OS/Makefile-Darwin file.
4032 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4033 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4035 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4036 variable. However, some OS use ints for inodes. I've added cast to long int
4037 to get rid of the compiler warning.
4039 19. I had forgotten to lock out "/../" in configuration file names when
4040 ALT_CONFIG_PREFIX was set.
4042 20. Routers used for verification do not need to specify transports. However,
4043 if such a router generated a host list, and callout was configured, Exim
4044 crashed, because it could not find a port number from the (non-existent)
4045 transport. It now assumes port 25 in this circumstance.
4047 21. Added the -t option to exigrep.
4049 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4050 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4051 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4052 them is set, LOOKUP_LSEARCH is forced.
4054 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4056 24. Added sender and host information to the "rejected by local_scan()" log
4057 line; previously there was no indication of these.
4059 25. Added .include_if_exists.
4061 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4062 Linux. It turns out that not all file systems support this. Apparently some
4063 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4064 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4065 not supported on the file descriptor, is now ignored when Exim is trying to
4066 sync a directory. This applies only to Linux.
4068 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4070 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4071 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4074 29. Added support for maildirsize files from supplied patch (modified a bit).
4076 30. The use of :fail: followed by an empty string could lead Exim to respond to
4077 sender verification failures with (e.g.):
4079 550 Verification failed for <xxx>
4080 550 Sender verify failed
4082 where the first response line was missing the '-' that indicates it is not
4083 the final line of the response.
4085 31. The loop for finding the name of the user that called Exim had a hardwired
4086 limit of 10; it now uses the value of finduser_retries, which is used for
4087 all other user lookups.
4089 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4092 33. Exim was neglecting to zero errno before one call of strtol() when
4093 expanding a string and expecting an integer value. On some systems this
4094 resulted in spurious "integer overflow" errors. Also, it was casting the
4095 result into an int without checking.
4097 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4098 did not work. The code looks as if it has *never* worked, though it appears
4099 to have been documented since at least releast 1.62. I have made it work.
4101 35. The "timeout_DNS" error in retry rules, also documented since at least
4102 1.62, also never worked. As it isn't clear exactly what this means, and
4103 clearly it isn't a major issue, I have abolished the feature by treating it
4104 as "timeout", and writing a warning to the main and panic logs.
4106 36. The display of retry rules for -brt wasn't always showing the error code
4109 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4110 timeout_connect_A, timeout_connect_MX.
4112 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4113 to the empty sender.
4115 39. The daemon was not analysing the content of -oX till after it had closed
4116 stderr and disconnected from the controlling terminal. This meant that any
4117 syntax errors were only noted on the panic log, and the return code from
4118 the command was 0. By re-arranging the code a little, I've made the
4119 decoding happen first, so such errors now appear on stderr, and the return
4120 code is 1. However, the actual setting up of the sockets still happens in
4121 the disconnected process, so errors there are still only recorded on the
4124 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4125 connections (as happens on some IP stacks) was logged at start up time as
4126 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4127 it from "IPv6 and IPv4", which means that two separate sockets are being
4130 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4131 says whether AF_INET or AF_INET6 was passed as an argument.
4133 42. Exiwhat output was messed up when time zones were included in log
4136 43. Exiwhat now gives more information about the daemon's listening ports,
4137 and whether -tls-on-connect was used.
4139 44. The "port" option of the smtp transport is now expanded.
4141 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4142 silently ignored. Now an error message is written to the main and panic
4145 46. There's a new ACL modifier called "logwrite" which writes to a log file
4146 as soon as it is encountered.
4148 47. Added $local_user_uid and $local_user_gid at routing time.
4150 48. Exim crashed when trying to verify a sender address that was being
4153 49. Exim was recognizing only a space character after ".include". It now also
4154 recognizes a tab character.
4156 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4157 extracting the relevant information from the specification. The man page no
4158 longer contains scrambled data for the -d option, and I've added a section
4159 at the front about calling Exim under different names.
4161 51. Added "extra_headers" argument to the "mail" command in filter files.
4163 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4166 53. Installed eximstats 1.29.
4168 54. Added transport_filter_timeout as a generic transport option.
4170 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4171 Cc: header lines. This was required by RFC 822, but it not required by RFC
4174 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4175 incoming messages that did not have them. Now it does so only if the
4176 message originates locally, that is, if there is no associated remote host
4177 address. When Resent- header lines are present, this applies to the Resent-
4178 lines rather than the non-Resent- lines.
4180 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4181 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4183 58. Messages for configuration errors now include the name of the main
4184 configuration file - useful now that there may be more than one file in a
4185 list (.included file names were always shown).
4187 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4188 for those rare installations that do not start the daemon as root or run it
4189 setuid root. I've cut out the call to initgroups() if the daemon is not
4192 60. The Exim user and group can now be bound into the binary as text strings
4193 that are looked up at the start of Exim's processing.
4195 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4197 62. Added $mailstore_basename variable.
4199 63. Installed patch to sieve.c from Michael Haardt.
4201 64. When Exim failed to open the panic log after failing to open the main log,
4202 the original message it was trying to log was written to stderr and debug
4203 output, but if they were not available (the usual case in production), it
4204 was lost. Now it is written to syslog before the two lines that record the
4205 failures to open the logs.
4207 65. Users' Exim filters run in subprocesses under the user's uid. It is
4208 possible for a "deliver" command or an alias in a "personal" command to
4209 provoke an address rewrite. If logging of address rewriting is configured,
4210 this fails because the process is not running as root or exim. There may be
4211 a better way of dealing with this, but for the moment (because 4.30 needs
4212 to be released), I have disabled address rewrite logging when running a
4213 filter in a non-root, non-exim process.
4219 1. The buildconfig auxiliary program wasn't quoting the value set for
4220 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4221 not defined. This bug was masked in 4.22 by the effect that was fixed in
4224 2. Some messages that were rejected after a message id was allocated were
4225 shown as "incomplete" by exigrep. It no longer does this for messages that
4226 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4228 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4229 have allow_domain_literals set, the ID did not get logged in the <= line.
4230 Domain literals are now always recognized in Message-ID: header lines.
4232 4. The first argument for a ${extract expansion item is the key name or field
4233 number. Leading and trailing spaces in this item were not being ignored,
4234 causing some misleading effects.
4236 5. When deliver_drop_privilege was set, single queue runner processes started
4237 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4238 same command in the process it spins off) were not dropping privilege.
4240 6. When the daemon running as "exim" started a queue runner, it always
4241 re-executed Exim in the spun-off process. This is a waste of effort when
4242 deliver_drop_privilege is set. The new process now just calls the
4243 queue-runner function directly.
4249 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4252 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4253 ignored. Though the use of -oP was forcing the writing of a pid file, it
4254 was always written to the default place.
4256 3. If the message "no IP address found for host xxxx" is generated during
4257 incoming verification, it is now followed by identification of the incoming
4258 connection (so you can more easily find what provoked it).
4260 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4262 5. Added some features to "harden" Exim a bit more against certain attacks:
4264 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4265 be put in Local/Makefile. This is like the never_users runtime option,
4266 but it cannot be overridden. The default setting is "root".
4268 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4269 prefix string with which any file named in a -C command line option
4272 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4273 is retained for -C and -D only if the caller of Exim is root. Without
4274 it, the exim user may also use -C and -D and retain privilege.
4276 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4277 command line option is disabled.
4279 6. Macro names set by the -D option must start with an upper case letter, just
4280 like macro names defined in the configuration file.
4282 7. Added "dereference=" facility to LDAP.
4284 8. Two instances of the typo "uknown" in the source files are fixed.
4286 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4287 the Configure-Makefile script screwed up while processing it.
4289 10. Incorporated PCRE 4.4.
4291 11. The SMTP synchronization check was not operating right at the start of an
4292 SMTP session. For example, it could not catch a HELO sent before the client
4293 waited for the greeting. There is now a check for outstanding input at the
4294 point when the greeting is written. Because of the duplex, asynchronous
4295 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4296 way, but not yet received, when the check is performed.
4298 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4299 on TCP/IP sockets, because this apparently causes some broken clients to
4302 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4303 unchanged) from the Cygwin maintainer.
4305 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4306 was supported instead of testing for mbx. Effectively a typo.
4308 15. The spa authenticator server code was not checking that the input it
4309 received was valid base64.
4311 16. The debug output line for the "set" modifier in ACLs was not showing the
4312 name of the variable that was being set.
4314 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4316 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4317 lookup on its own. Something else was needed to trigger the lookup. For
4318 example, a match in host_lookup or the need for a host name in a host list.
4319 Now, if $sender_host_name is referenced and the host name has not yet been
4320 looked up, a lookup is performed. If the lookup fails, the variable remains
4321 empty, and $host_lookup_failed is set to "1".
4323 19. Added "eqi" as a case-independent comparison operator.
4325 20. The saslauthd authentication condition could segfault if neither service
4326 nor realm was specified.
4328 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4329 error message that was logged was misleading, and incoming SMTP
4330 connections were dropped. The message is now more accurate, and temporary
4331 errors are given to SMTP connections.
4333 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4334 (except RSET) with a 421 error, until QUIT is received. However, it was
4335 failing to send a response to QUIT.
4337 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4338 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4339 ACL is now run after the helo_try_verify_hosts code.
4341 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4342 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4343 case-independent, so other case variants are also recognized). Apparently
4344 some systems use these upper case variants.
4346 25. If more than two messages were waiting for the same host, and a transport
4347 filter was specified for the transport, Exim sent two messages over the
4348 same TCP/IP connection, and then failed with "socket operation on non-
4349 socket" when it tried to send the third.
4351 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4353 27. The extern definition of crypt16() in expand.c was not being excluded when
4354 the OS had its own crypt16() function.
4356 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4357 as a preferred synonym for return_size_limit, both as an option and as an
4360 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4362 30. Changed the default configuration ACL to relax the local part checking rule
4363 for addresses that are not in any local domains. For these addresses,
4364 slashes and pipe symbols are allowed within local parts, but the sequence
4365 /../ is explicitly forbidden.
4367 31. SPA server authentication was not clearing the challenge buffer before
4370 32. log_message in a "warn" ACL statement was writing to the reject log as
4371 well as to the main log, which contradicts the documentation and doesn't
4372 seem right (because no rejection is happening). So I have stopped it.
4374 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4375 However, I am unable to do any testing of this.
4377 34. Fixed an infelicity in the appendfile transport. When checking directories
4378 for a mailbox, to see if any needed to be created, it was accidentally
4379 using path names with one or more superfluous leading slashes; tracing
4380 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4382 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4383 contents are added to the log line that is written for every discarded
4384 recipient. (Previously a log_message setting was ignored.)
4386 36. The ${quote: operator now quotes the string if it is empty.
4388 37. The install script runs exim in order to find its version number. If for
4389 some reason other than non-existence or emptiness, which it checks, it
4390 could not run './exim', it was installing it with an empty version number,
4391 i.e. as "exim-". This error state is now caught, and the installation is
4394 38. An argument was missing from the function that creates an error message
4395 when Exim fails to connect to the socket for saslauthd authentication.
4396 This could cause Exim to crash, or give a corrupted message.
4398 39. Added isip, isip4, and isip6 to ${if conditions.
4400 40. The ACL variables $acl_xx are now saved with the message, and can be
4401 accessed later in routers, transports, and filters.
4403 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4404 strings in the file are not string-expanded.
4406 42. If a MAIL command specified a SIZE value that was too large to fit into an
4407 int variable, the check against message_size_limit failed. Such values are
4408 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4409 day this will have to be increased, but I don't think I want to be around
4410 when emails are that large.
4417 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4418 iconv() is not standard in FreeBSD.
4420 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4421 IPv6 enabled. The observed symptom was a segmentation fault on return from
4422 the function os_common_find_running_interfaces() in src/os.c.
4424 3. In the check_special_case() function in daemon.c I had used "errno" as an
4425 argument name, which causes warnings on some systems. This was basically a
4426 typo, since it was named "eno" in the comments!
4428 4. The code that waits for the clock to tick (at a resolution of some fraction
4429 of a second) so as to ensure message-id uniqueness was always waiting for
4430 at least one whole tick, when it could have waited for less. [This is
4431 almost certainly not relevant at current processor speeds, where it is
4432 unlikely to ever wait at all. But we try to future-proof.]
4434 5. The function that sleeps for a time interval that includes fractions of a
4435 second contained a race. It did not block SIGALRM between setting the
4436 timer, and suspending (a couple of lines later). If the interval was short
4437 and the sigsuspend() was delayed until after it had expired, the suspension
4438 never ended. On busy systems this could lead to processes getting stuck for
4441 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4442 process, before it forks any delivery processes. The open lookup caching
4443 mechanism meant that the open file or database connection was passed into
4444 the delivery process. The problem was that delivery processes always tidy
4445 up cached lookup data. This could cause a problem for the next delivery
4446 process started by the queue runner, because the external queue runner
4447 process does not know about the closure. So the next delivery process
4448 still has data in the lookup cache. In the case of a file lookup, there was
4449 no problem because closing a file descriptor in a subprocess doesn't affect
4450 the parent. However, if the lookup was caching a connection to a database,
4451 the connection was closed, and the second delivery process was likely to
4452 see errors such as "PGSQL: query failed: server closed the connection
4453 unexpectedly". The problem has been fixed by closing all cached lookups
4454 in a queue runner before running a delivery process.
4456 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4457 seem to have the "const" qualifier which it has on other OS. I've
4460 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4461 *of the same type* (client or server) with the same public name that an
4462 error should be diagnosed.
4464 9. When Exim looked up a host name for an IP address, but failed to find the
4465 original IP address when looking up the host name (a safety check), it
4466 output the message "<ip address> does not match any IP for NULL", which was
4467 confusing, to say the least. The bug was that the host name should have
4468 appeared instead of "NULL".
4470 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4471 user that is built into the binary, and the -C or -D options is used, root
4472 privilege is dropped before the configuration file is read. In addition,
4473 logging is switched to stderr instead of the normal log files. If the
4474 configuration then re-defines the Exim user, the unprivileged environment
4475 is probably not what is expected, so Exim logs a panic warning message (but
4478 However, if deliver_drop_privilege is set, the unprivileged state may well
4479 be exactly what is intended, so the warning has been cut out in that case,
4480 and Exim is allowed to try to write to its normal log files.
4486 1. smtp_return_error_details was not giving details for temporary sender
4487 or receiver verification errors.
4489 2. Diagnose a configuration error if two authenticators have the same public
4492 3. Exim used not to create the message log file for a message until the first
4493 delivery attempt. This could be confusing when incoming messages were held
4494 for policy or load reasons. The message log file is now created at the time
4495 the message is received, and an initial "Received" line is written to it.
4497 4. The automatically generated man page for command line options had a minor
4498 bug that caused no ill effects; however, a more serious problem was that
4499 the procedure for building the man page automatically didn't always
4500 operate. Consequently, release 4.20 contains an out-of-date version. This
4501 shouldn't happen again.
4503 5. When building Exim with embedded Perl support, the script that builds the
4504 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4505 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4507 6. The freeze_tell option was not being used for messages that were frozen on
4508 arrival, either by an ACL or by local_scan().
4510 7. Added the smtp_incomplete_transaction log selector.
4512 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4513 was accepting AUTH without a new EHLO.
4515 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4516 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4519 10. Logging of TCP/IP connections (when configured) now happens in the main
4520 daemon process instead of the child process, so that the TCP/IP connection
4521 count is more accurate (but it can never be perfect).
4523 11. The use of "drop" in a nested ACL was not being handled correctly in the
4524 outer ACL. Now, if condition failure induced by the nested "drop" causes
4525 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4526 or "require"), the connection is dropped.
4528 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4529 that yield "discard" can now be used with an "accept" or a "discard" verb,
4530 but an error is generated for any others (because I can't see a useful way
4531 to define what should happen).
4533 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4534 are now processed in the same way as lines in the Exim configuration file.
4535 In particular, continuation lines are supported.
4537 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4539 15. Added -ti meaning -t -i.
4541 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4542 domains, and warn by logging if others are found.
4544 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4545 returned from GIFCONF when Exim is trying to find the list of interfaces on
4546 a host. The code in os.c has been modified to copy each ifreq to an aligned
4547 structure in all cases.
4549 Also, in some cases, the returned ifreq's were being copied to a 'struct
4550 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4551 means the last couple of bytes of an IPv6 address could be chopped if the
4552 ifreq contained only a normal sockaddr (14 bytes storage).
4554 18. Named domain lists were not supported in the hosts_treat_as_local option.
4555 An entry such as +xxxx was not recognized, and was treated as a literal
4558 19. Ensure that header lines added by a DATA ACL are included in the reject log
4559 if the ACL subsequently rejects the message.
4561 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4562 MD5 (which is deprecated).
4564 21. When testing a filter file using -bf, Exim was writing a message when it
4565 took the sender from a "From " line in the message, but it was not doing so
4566 when it took $return_path from a Return-Path: header line. It now does.
4568 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4569 with a valid header line field name (a series of printing characters
4570 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4572 23. Changed "disc" in the source to "disk" to conform to the documentation and
4573 the book and for uniformity.
4575 24. Ignore Sendmail's -Ooption=value command line item.
4577 25. When execve() failed while trying to run a command in a pipe transport,
4578 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4579 could be confused with a return value of 69 from the command itself. This
4580 has been changed to 127, the value the shell returns if it is asked to run
4581 a non-existent command. The wording for the related log line suggests a
4582 non-existent command as the problem.
4584 26. If received_header_text expands to an empty string, do not add a Received:
4585 header line to the message. (Well, it adds a token one on the spool, but
4586 marks it "old" so that it doesn't get used or transmitted.)
4588 27. Installed eximstats 1.28 (addition of -nt option).
4590 28. There was no check for failure on the call to getsockname() in the daemon
4591 code. This can fail if there is a shortage of resources on the system, with
4592 ENOMEM, for example. A temporary error is now given on failure.
4594 29. Contrary to the C standard, it seems that in some environments, the
4595 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4596 program. Exim now does this explicitly; it affects the formatting of
4597 timestamps using strftime().
4599 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4600 complaints. I've now initialized all the variables, to avoid this.
4602 32. Header lines added by a system filter were not being "seen" during
4603 transport-time rewrites.
4605 33. The info_callback() function passed to OpenSSL is set up with type void
4606 (*)(SSL *, int, int), as described somewhere. However, when calling the
4607 function (actually a macro) that sets it up, the type void(*)() is
4608 expected. I've put in a cast to prevent warnings from picky compilers.
4610 34. If a DNS black list lookup found a CNAME record, but there were no A
4611 records associated with the domain it pointed at, Exim crashed.
4613 35. If a DNS black list lookup returned more than one A record, Exim ignored
4614 all but the first. It now scans all returned addresses if a particular IP
4615 value is being sought. In this situation, the contents of the
4616 $dnslist_value variable are a list of all the addresses, separated by a
4619 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4620 to accept a host name and all its aliases if the forward lookup for any of
4621 them yielded the IP address of the incoming connection. Now it accepts only
4622 those names whose forward lookup yields the correct IP address. Any other
4623 names are discarded. This closes a loophole whereby a rogue DNS
4624 administrator could create reverse DNS records to break through a
4625 wildcarded host restriction in an ACL.
4627 37. If a user filter or a system filter that ran in a subprocess used any of
4628 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4629 the wrong values were passed to the pipe command ($thisaddress had the
4630 value of $0, $0 had the value of $1, etc). This bug was introduced by
4631 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4633 38. Improved the line breaking for long SMTP error messages from ACLs.
4634 Previously, if there was no break point between 40 and 75 characters, Exim
4635 left the rest of the message alone. Two changes have been made: (a) I've
4636 reduced the minimum length to 35 characters; (b) if it can't find a break
4637 point between 35 and 75 characters, it looks ahead and uses the first one
4638 that it finds. This may give the occasional overlong line, but at least the
4639 remaining text gets split now.
4641 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4642 file descriptors might be low, and that setting 1000 would always raise it.
4643 It turns out that in some environments, the limit is already over 1000 and
4644 that lowering it causes trouble. So now Exim takes care not to decrease it.
4646 40. When delivering a message, the value of $return_path is set to $sender_
4647 address at the start of routing (routers may change the value). By an
4648 oversight, this default was not being set up when an address was tested by
4649 -bt or -bv, which affected the outcome if any router or filter referred to
4652 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4653 log only when "message" or "log_message" are set. However, if one of the
4654 conditions was an address verification, or a call to a nested ACL, the
4655 messages generated by the underlying test were being passed through. This
4656 no longer happens. The underlying message is available in $acl_verify_
4657 message for both "message" and "log_message" expansions, so it can be
4658 passed through if needed.
4660 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4661 new expansion $bh_ to give the encoded byte string without charset
4662 translation. Translation happens only if iconv() is available; HAVE_ICONV
4663 indicates this at build time. HEADERS_CHARSET gives the charset to
4664 translate to; headers_charset can change it in the configuration, and
4665 "headers charset" can change it in an individual filter file.
4667 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4668 that creates RFC 2047 encoded "words" labels them as that charset instead
4669 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4670 expansion operator; (ii) when Exim creates a From: line for a local
4671 message; (iii) when a header line is rewritten to include a "phrase" part.
4673 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4674 buggy, causing it to skip the first lines of messages whose message ID
4675 ended in 'D'. This would not have bitten before Exim release 4.14, because
4676 message IDs were unlikely to end in 'D' before then. The effect was to have
4677 incorrect size information for certain domains.
4679 45. #include "config.h" was missing at the start of the crypt16.c module. This
4680 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4683 46. If there was a timeout during a "random" callout check, Exim treated it as
4684 a failure of the random address, and carried on sending RSET and the real
4685 address. If the delay was just some slowness somewhere, the response to the
4686 original RCPT would be taken as a response to RSET and so on, causing
4687 mayhem of various kinds.
4689 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4690 when I implemented it. It didn't allow for the fact that some option values
4691 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4692 the right test for positive values.
4694 48. Domain names in DNS records are case-independent. Exim always looks them up
4695 in lower case. Some resolvers return domain names in exactly the case they
4696 appear in the zone file, that is, they may contain uppercase letters. Not
4697 all resolvers do this - some return always lower case. Exim was treating a
4698 change of case by a resolver as a change of domain, similar to a widening
4699 of a domain abbreviation. This triggered its re-routing code and so it was
4700 trying to route what was effectively the same domain again. This normally
4701 caused routing to fail (because the router wouldn't handle the domain
4702 twice). Now Exim checks for this case specially, and just changes the
4703 casing of the domain that it ultimately uses when it transmits the message
4706 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4709 50. If a filter generated a file delivery with a non-absolute name (possible if
4710 no home directory exists for the router), the forbid_file option was not
4713 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4714 the existing equality matching.
4716 52. Exim was using ints instead of ino_t variables in some places where it was
4717 dealing with inode numbers.
4719 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4720 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4721 called TMPDIR, and if it finds it is different, it changes its value.
4723 54. The smtp_printf() function is now made available to local_scan() so
4724 additional output lines can be written before returning. There is also an
4725 smtp_fflush() function to enable the detection of a dropped connection.
4726 The variables smtp_input and smtp_batched_input are exported to
4729 55. Changed the default runtime configuration: the message "Unknown user"
4730 has been removed from the ACL, and instead placed on the localuser router,
4731 using the cannot_route_message feature. This means that any verification
4732 failures that generate their own messages won't get overridden. Similarly,
4733 the "Unrouteable address" message that was in the ACL for unverifiable
4734 relay addresses has also been removed.
4736 56. Added hosts_avoid_esmtp to the smtp transport.
4738 57. The exicyclog script was not checking for the esoteric option
4739 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4740 will work only if exicyclog is run under the appropriate euid.
4742 58. Following a discussion on the list, the rules by which Exim recognises line
4743 endings on incoming messages have been changed. The -dropcr and drop_cr
4744 options are now no-ops, retained only for backwards compatibility. The
4745 following line terminators are recognized: LF CRLF CR. However, special
4746 processing applies to CR:
4748 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4749 nor a local message in the state where . is a terminator.
4751 (ii) If a bare CR is encountered in a header line, an extra space is added
4752 after the line terminator so as not to end the header. The reasoning
4753 behind this is that bare CRs in header lines are most likely either
4754 to be mistakes, or people trying to play silly games.
4756 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4757 was being incorrectly given as 18 bytes larger than it should have been.
4758 This is a VOB (very old bug).
4760 60. This may never have affected anything current, but just in case it has:
4761 When the local host is found other than at the start of a list of hosts,
4762 the local host, those with the same MX, and any that follow, are discarded.
4763 When the list in question was part of a longer list of hosts, the following
4764 hosts (not currently being processed) were also being discarded. This no
4765 longer happens. I'm not sure if this situation could ever has previously
4768 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4771 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4772 header. This is something that is recommended in a new Internet Draft, and
4773 is something that is documented as being done by Sendmail. There are two
4774 possible values. For messages generated by the autoreply transport, Exim
4777 Auto-Submitted: auto-replied
4779 whereas for all other generated messages (e.g. bounces) it adds
4781 Auto-Submitted: auto-generated
4783 63. The "personal" condition in filters now includes a test for the
4784 Auto-Submitted: header. If it contains the string "auto-" the message it
4785 not considered personal.
4787 64. Added rcpt_include_affixes as a generic transport option.
4789 65. Added queue_only_override (default true).
4791 66. Added the syslog_duplication option.
4793 67. If what should have been the first header line of a message consisted of
4794 a space followed by a colon, Exim was mis-interpreting it as a header line.
4795 It isn't of course - it is syntactically invalid and should therefore be
4796 treated as the start of the message body. The misbehaviour could have
4797 caused a number of strange effects, including loss of data in subsequent
4798 header lines, and spool format errors.
4800 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4801 client host had authenticated. This control can now be exercised by an ACL
4802 for more flexibility.
4804 69. By default, callouts do not happen when testing with -bh. There is now a
4805 variant, -bhc, which does actually run the callout code, including
4806 consulting and updating the callout cache.
4808 70. Added support for saslauthd authentication, courtesy of Alexander
4811 71. If statvfs() failed on the spool or log directories while checking their
4812 size for availability, Exim confusingly gave the error "space shortage".
4813 Furthermore, in debugging mode it crashed with a floating point exception.
4814 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4815 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4816 serious problem, Exim now writes to the main and panic logs when this
4817 happens, with details of the failure. It then refuses to accept the
4818 incoming message, giving the message "spool directory problem" or "log
4819 directory problem" with a 421 code for SMTP messages.
4821 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4822 0, 1, and 2 exist, because some OS complain for execs without them (see
4823 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4824 descriptors. However, the code omitted to check that the open succeeded,
4825 causing mysterious errors if for some reason the permissions on /dev/null
4826 got screwed. Now Exim writes a message to the main and panic logs, and
4827 bombs out if it can't open /dev/null.
4829 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4830 interact so that it is all more flexible. It is supposed to remain
4831 backwards compatible. Also added extra_local_interfaces.
4833 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4834 to bomb out with an assertion failure - to the client this appears as a
4835 connection drop. This problem occurs in the part of the code that was taken
4836 from the Samba project. Fortunately, the assertion is in a very simple
4837 function, so I have fixed this by reproducing the function inline in the
4838 one place where it is called, and arranging for authentication to fail
4839 instead of killing the process with assert().
4841 75. The SPA client code was not working when the server requested OEM rather
4842 than Unicode encoding.
4844 76. Added code to make require_files with a specific uid setting more usable in
4845 the case where statting the file as root fails - usually a non-root-mounted
4846 NFS file system. When this happens and the failure is EACCES, Exim now
4847 forks a subprocess and does the per-uid checking as the relevant uid.
4849 77. Added process_log_path.
4851 78. If log_file_path was not explicitly set, a setting of check_log_space or
4852 check_log_inodes was ignored.
4854 79. If a space check for the spool or log partitions fails, the incident is now
4855 logged. Of course, in the latter case the data may get lost...
4857 80. Added the %p formatting code to string_format() so that it can be used to
4858 print addresses in debug_print(). Adjusted all the address printing in the
4859 debugging in store.c to use %p rather than %d.
4861 81. There was a concern that a line of code in smtp_in.c could overflow a
4862 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4863 initially expressed, the concern was not well-founded, because trailing
4864 spaces are removed early. However, if the trailing spaces were followed by
4865 a NULL, they did not get removed, so the overflow was possible. Two fixes
4868 (a) I re-wrote the offending code in a cleaner fashion.
4869 (b) If an incoming SMTP command contains a NULL character, it is rejected
4872 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4873 runs initgroups(), so that if the Exim user is in any additional groups,
4874 they will be used during message reception.
4880 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob