1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.526 2007/08/23 10:16:51 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 PH/01 Another patch from the Sieve maintainer.
11 PH/02 When an IPv6 address is converted to a string for single-key lookup
12 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
13 dots are used instead of colons so that keys in lsearch files need not
14 contain colons. This was done some time before quoting was made available
15 in lsearch files. However, iplsearch files do require colons in IPv6 keys
16 (notated using the quote facility) so as to distinguish them from IPv4
17 keys. This meant that lookups for IP addresses in host lists did not work
18 for iplsearch lookups.
20 This has been fixed by arranging for IPv6 addresses to be expressed with
21 colons if the lookup type is iplsearch. This is not incompatible, because
22 previously such lookups could never work.
24 The situation is now rather anomolous, since one *can* have colons in
25 ordinary lsearch keys. However, making the change in all cases is
26 incompatible and would probably break a number of configurations.
28 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
31 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
32 conversion specification without a maximum field width, thereby enabling
33 a rogue spamd server to cause a buffer overflow. While nobody in their
34 right mind would setup Exim to query an untrusted spamd server, an
35 attacker that gains access to a server running spamd could potentially
36 exploit this vulnerability to run arbitrary code as the Exim user.
38 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
39 $primary_hostname instead of what libspf2 thinks the hosts name is.
41 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
42 a directory entry by the name of the lookup key. Previously, if a
43 symlink pointed to a non-existing file or a file in a directory that
44 Exim lacked permissions to read, a lookup for a key matching that
45 symlink would fail. Now it is enough that a matching directory entry
46 exists, symlink or not. (Bugzilla 503.)
48 PH/03 The body_linecount and body_zerocount variables are now exported in the
51 PH/04 Added the $dnslist_matched variable.
53 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
54 This means they are set thereafter only if the connection becomes
57 PH/06 Added the client_condition to authenticators so that some can be skipped
58 by clients under certain conditions.
60 PH/07 The error message for a badly-placed control=no_multiline_responses left
61 "_responses" off the end of the name.
63 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
65 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
66 (without spaces) instead of just copying the configuration text.
68 PH/10 Added the /noupdate option to the ratelimit ACL condition.
70 PH/11 Added $max_received_linelength.
72 PH/12 Added +ignore_defer and +include_defer to host lists.
74 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
75 way in which PCRE > 7.0 is built.
77 PH/14 Implemented queue_only_load_latch.
79 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
80 MAIL command. The effect was to mangle the value on 64-bit systems.
82 PH/16 Another patch from the Sieve maintainer.
84 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
86 PH/18 If a system quota error occurred while trying to create the file for
87 a maildir delivery, the message "Mailbox is full" was not appended to the
88 bounce if the delivery eventually timed out. Change 4.67/27 below applied
89 only to a quota excession during the actual writing of the file.
91 PH/10 It seems that peer DN values may contain newlines (and other non-printing
92 characters?) which causes problems in log lines. The DN values are now
93 passed through string_printing() before being added to log lines.
95 PH/11 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
96 and InterBase are left for another time.)
102 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
103 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
106 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
107 issue a MAIL command.
109 PH/02 In an ACL statement such as
111 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
113 if a client was not listed at all, or was listed with a value other than
114 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
115 the condition was not true (as it should be), so access was not denied.
116 The bug was that the ! inversion was incorrectly passed on to the second
117 item. This has been fixed.
119 PH/03 Added additional dnslists conditions == and =& which are different from
120 = and & when the dns lookup returns more than one IP address.
122 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
123 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
125 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
126 FSYNC, which compiles an option called disable_fsync that allows for
127 bypassing fsync(). The documentation is heavily laced with warnings.
129 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
131 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
132 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
133 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
134 including adding "make clean"; (3) Added -fPIC when compiling the test
135 dynamically loaded module, to get rid of a warning.
137 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
138 message fails, move_frozen_messages = true and ignore_bounce_errors_after
139 = 0s. The bug is otherwise harmless.
141 PH/07 There was a bug in the dovecot authenticator such that the value of
142 $auth1 could be overwritten, and so not correctly preserved, after a
143 successful authentication. This usually meant that the value preserved by
144 the server_setid option was incorrect.
146 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
148 PH/09 Installed PCRE release 7.0.
150 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
151 run for batched SMTP input. It is now run at the start of every message
152 in the batch. While fixing this I discovered that the process information
153 (output by running exiwhat) was not always getting set for -bs and -bS
154 input. This is fixed, and it now also says "batched" for BSMTP.
156 PH/11 Added control=no_pipelining.
158 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
159 patch, slightly modified), and move the expansion of helo_data till after
160 the connection is made in the smtp transport (so it can use these
163 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
165 PH/14 Added log_selector = +pid.
167 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
169 PH/16 Add ${if forany and ${if forall.
171 PH/17 Added dsn_from option to vary the From: line in DSNs.
173 PH/18 Flush SMTP output before performing a callout, unless control =
174 no_callout_flush is set.
176 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
177 was true (the default) a successful delivery failed to delete the retry
178 item, thus causing premature timeout of the address. The bug is now
181 PH/20 Added hosts_avoid_pipelining to the smtp transport.
183 PH/21 Long custom messages for fakedefer and fakereject are now split up
184 into multiline reponses in the same way that messages for "deny" and
185 other ACL rejections are.
187 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
188 with slight modification.
190 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
191 draft, changing the syntax and factoring some duplicate code".
193 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
194 for deliveries of the second and subsequent messages over the same SMTP
197 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
198 ${reduce, with only minor "tidies".
200 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
202 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
203 expansion side effects.
205 PH/27 When a message times out after an over-quota error from an Exim-imposed
206 quota, the bounce message says "mailbox is full". This message was not
207 being given when it was a system quota that was exceeded. It now should
210 MH/03 Made $recipients available in local_scan(). local_scan() already has
211 better access to the recipient list through recipients_list[], but
212 $recipients can be useful in postmaster-provided expansion strings.
214 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
215 in the case of a MAIL command with additional options following the
216 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
217 were accidentally chopped off.
219 PH/29 SMTP synchronization checks are implemented when a command is read -
220 there is a check that no more input is waiting when there shouldn't be
221 any. However, for some commands, a delay in an ACL can mean that it is
222 some time before the response is written. In this time, more input might
223 arrive, invalidly. So now there are extra checks after an ACL has run for
224 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
225 pipelining has not been advertised.
227 PH/30 MH's patch to allow iscntrl() characters to be list separators.
229 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
230 returned in the SMTP response when smtp_return_error_details was false.
233 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
234 instead of the C I/O that was originally supplied, because problems were
237 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
238 Exim which did not show up earlier: it was assuming that a call to
239 SSL_CTX_set_info_callback() might give an error value. In fact, there is
240 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
241 was a macro that became an assignment, so it seemed to work. This has
242 changed to a proper function call with a void return, hence the compile
243 error. Exim's code has been fixed.
245 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
248 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
250 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
252 PH/37 If a message is not accepted after it has had an id assigned (e.g.
253 because it turns out to be too big or there is a timeout) there is no
254 "Completed" line in the log. When some messages of this type were
255 selected by exigrep, they were listed as "not completed". Others were
256 picked up by some special patterns. I have improved the selection
257 criteria to be more general.
259 PH/38 The host_find_failed option in the manualroute router can now be set
260 to "ignore", to completely ignore a host whose IP address cannot be
261 found. If all hosts are ignored, the behaviour is controlled by the new
262 host_all_ignored option.
264 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
265 homing or because of multiple MX records with /mx) generated more than
266 one IP address, and the following item turned out to be the local host,
267 all the secondary addresses of the first item were incorrectly removed
268 from the list, along with the local host and any following hosts (which
269 is what is supposed to happen).
271 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
272 whoever called Exim into the -H file. In the case of the daemon it was
273 behaving confusingly. When first started, it used values for whoever
274 started the daemon, but after a SIGHUP it used the Exim user (because it
275 calls itself on a restart). I have changed the code so that it now always
278 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
279 message are rejected with the same error (e.g. no authentication or bad
280 sender address), and a DATA command is nevertheless sent (as can happen
281 with PIPELINING or a stupid MUA), the error message that was given to the
282 RCPT commands is included in the rejection of the DATA command. This is
283 intended to be helpful for MUAs that show only the final error to their
286 PH/42 Another patch from the Sieve maintainer.
288 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
289 Eximstats - Fixed some broken HTML links and added missing column headers
291 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
292 columns for Rejects, Temp Rejects, Ham, and Spam rows.
294 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
296 PH/43 Yet another patch from the Sieve maintainer.
298 PH/44 I found a way to check for a TCP/IP connection going away before sending
299 the response to the final '.' that terminates a message, but only in the
300 case where the client has not sent further data following the '.'
301 (unfortunately, this is allowed). However, in many cases there won't be
302 any further data because there won't be any more messages to send. A call
303 to select() can be used: if it shows that the input is "ready", there is
304 either input waiting, or the socket has been closed. An attempt to read
305 the next input character can distinguish the two cases. Previously, Exim
306 would have sent an OK response which the client would never have see.
307 This could lead to message repetition. This fix should cure that, at
308 least in a lot of common cases.
310 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
311 advertised in response to EHLO.
317 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
318 fixed by 4.65/MH/01 (is this a record?) are fixed:
320 (i) An empty string was always treated as zero by the numeric comparison
321 operators. This behaviour has been restored.
323 (ii) It is documented that the numeric comparison operators always treat
324 their arguments as decimal numbers. This was broken in that numbers
325 starting with 0 were being interpreted as octal.
327 While fixing these problems I realized that there was another issue that
328 hadn't been noticed. Values of message_size_limit (both the global option
329 and the transport option) were treated as octal if they started with 0.
330 The documentation was vague. These values are now always treated as
331 decimal, and I will make that clear in the documentation.
337 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
338 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
341 MH/01 Don't check that the operands of numeric comparison operators are
342 integers when their expansion is in "skipping" mode (fixes bug
343 introduced by 4.64-PH/07).
345 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
346 child addresses, Exim now panics and dies. Previously, because the count
347 is held in a short int, deliveries were likely to be lost. As such a
348 large number of recipients for a single message is ridiculous
349 (performance will be very, very poor), I have chosen to impose a limit
350 rather than extend the field.
356 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
357 leftover -K file (the existence of which was triggered by #402).
358 While we were at it, introduced process PID as part of the -K
359 filename. This should rule out race conditions when creating
362 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
363 processing considerably. Previous code took too long for large mails,
364 triggering a timeout which in turn triggers #401.
366 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
367 in the DK code in transports.c. sendfile() is not really portable,
368 hence the _LINUX specificness.
370 TF/01 In the add_headers option to the mail command in an Exim filter,
371 there was a bug that Exim would claim a syntax error in any
372 header after the first one which had an odd number of characters
375 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
376 callout verification, Exim cached a "reject" for the entire domain. This
377 is correct for most verifications, but it is not correct for a recipient
378 verification with use_sender or use_postmaster set, because in that case
379 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
380 case of MAIL FROM:<> rejection from other early rejections (e.g.
381 rejection of HELO). When verifying a recipient using a non-null MAIL
382 address, the cache is ignored if it shows MAIL FROM:<> rejection.
383 Whatever the result of the callout, the value of the domain cache is
384 left unchanged (for any other kind of callout, getting as far as trying
385 RCPT means that the domain itself is ok).
387 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
390 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
391 manifest itself as EPIPE rather than ECONNECT. When tidying away a
392 session, the daemon ignores ECONNECT errors and logs others; it now
393 ignores EPIPE as well.
395 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
396 (quoted-printable decoding).
398 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
399 later the small subsequent patch to fix an introduced bug.
401 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
403 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
405 PH/08 An error is now given if message_size_limit is specified negative.
407 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
408 to be given (somewhat) arbitrary names.
410 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
413 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
414 miscellaneous code fixes
416 PH/10 Added the log_reject_target ACL modifier to specify where to log
419 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
420 hostname. This is wrong, because it relates to the incoming message (and
421 probably the interface on which it is arriving) and not to the outgoing
422 callout (which could be using a different interface). This has been
423 changed to use the value of the helo_data option from the smtp transport
424 instead - this is what is used when a message is actually being sent. If
425 there is no remote transport (possible with a router that sets up host
426 addresses), $smtp_active_hostname is used.
428 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
429 tweaks were necessary in order to get it to work (see also 21 below):
430 (a) The code assumed that strncpy() returns a negative number on buffer
431 overflow, which isn't the case. Replaced with Exim's string_format()
433 (b) There were several signed/unsigned issues. I just did the minimum
434 hacking in of casts. There is scope for a larger refactoring.
435 (c) The code used strcasecmp() which is not a standard C function.
436 Replaced with Exim's strcmpic() function.
437 (d) The code set only $1; it now sets $auth1 as well.
438 (e) A simple test gave the error "authentication client didn't specify
439 service in request". It would seem that Dovecot has changed its
440 interface. Fortunately there's a specification; I followed it and
441 changed what the client sends and it appears to be working now.
443 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
446 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
447 address A is aliased to B and C, where B exists and C does not. Without
448 -v the output is "A verified" because verification stops after a
449 successful redirection if more than one address is generated. However,
450 with -v the child addresses are also verified. Exim was outputting "A
451 failed to verify" and then showing the successful verification for C,
452 with its parentage. It now outputs "B failed to verify", showing B's
453 parentage before showing the successful verification of C.
455 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
456 look up a TXT record in a specific list after matching in a combined
459 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
460 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
461 they consult the DNS. I had assumed they would set it the way they
462 wanted; and indeed my experiments on Linux seem to show that in some
463 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
464 To be on the safe side, however, I have now made the interface to
465 host_find_byname() similar to host_find_bydns(), with an argument
466 containing the DNS resolver options. The host_find_byname() function now
467 sets these options at its start, just as host_find_bydns() does. The smtp
468 transport options dns_qualify_single and dns_search_parents are passed to
469 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
470 of host_find_byname() use the default settings of RES_DEFNAMES
471 (qualify_single) but not RES_DNSRCH (search_parents).
473 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
474 spool_read_header() do less string testing, by means of a preliminary
475 switch on the second character of optional "-foo" lines. (This is
476 overdue, caused by the large number of possibilities that now exist.
477 Originally there were few.) While I was there, I also converted the
478 str(n)cmp tests so they don't re-test the leading "-" and the first
479 character, in the hope this might squeeze out yet more improvement.
481 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
482 flag allowing group syntax was set by the header_syntax check but not
483 turned off, possible causing trouble later; (2) The flag was not being
484 set at all for the header_verify test, causing "group"-style headers to
485 be rejected. I have now set it in this case, and also caused header_
486 verify to ignore an empty address taken from a group. While doing this, I
487 came across some other cases where the code for allowing group syntax
488 while scanning a header line wasn't quite right (mostly, not resetting
489 the flag correctly in the right place). These bugs could have caused
490 trouble for malformed header lines. I hope it is now all correct.
492 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
493 with the "reply" argument non-NULL. The code, however (which originally
494 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
495 but it didn't always do it. This confused somebody who was copying the
496 code for some other use. I have removed all the tests.
498 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
499 feature that was used to support insecure browsers during the U.S. crypto
500 embargo. It requires special client support, and Exim is probably the
501 only MTA that supported it -- and would never use it because real RSA is
502 always available. This code has been removed, because it had the bad
503 effect of slowing Exim down by computing (never used) parameters for the
504 RSA_EXPORT functionality.
506 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
507 authenticator to fail if there's a tab character in the incoming data
508 (there should never be unless someone is messing about, as it's supposed
509 to be base64-encoded). Also added, on Timo's advice, the "secured" option
510 if the connection is using TLS or if the remote IP is the same as the
511 local IP, and the "valid-client-cert option" if a client certificate has
514 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
515 authenticators. This can be used for authorization after authentication
516 succeeds. (In the case of plaintext, it servers for both authentication
519 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
520 if any retry times were supplied.
522 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
523 connection, where there is no client IP address to check. In this
524 situation, the verify now always succeeds.
526 PH/25 Applied John Jetmore's -Mset patch.
528 PH/26 Added -bem to be like -Mset, but loading a message from a file.
530 PH/27 In a string expansion for a processed (not raw) header when multiple
531 headers of the same name were present, leading whitespace was being
532 removed from all of them, but trailing whitespace was being removed only
533 from the last one. Now trailing whitespace is removed from each header
534 before concatenation. Completely empty headers in a concatenation (as
537 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
538 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
540 PH/29 [Removed. This was a change that I later backed out, and forgot to
541 correct the ChangeLog entry (that I had efficiently created) before
542 committing the later change.]
544 PH/30 Exim was sometimes attempting to deliver messages that had suffered
545 address errors (4xx response to RCPT) over the same connection as other
546 messages routed to the same hosts. Such deliveries are always "forced",
547 so retry times are not inspected. This resulted in far too many retries
548 for the affected addresses. The effect occurred only when there were more
549 hosts than the hosts_max_try setting in the smtp transport when it had
550 the 4xx errors. Those hosts that it had tried were not added to the list
551 of hosts for which the message was waiting, so if all were tried, there
552 was no problem. Two fixes have been applied:
554 (i) If there are any address or message errors in an SMTP delivery, none
555 of the hosts (tried or untried) are now added to the list of hosts
556 for which the message is waiting, so the message should not be a
557 candidate for sending over the same connection that was used for a
558 successful delivery of some other message. This seems entirely
559 reasonable: after all the message is NOT "waiting for some host".
560 This is so "obvious" that I'm not sure why it wasn't done
561 previously. Hope I haven't missed anything, but it can't do any
562 harm, as the worst effect is to miss an optimization.
564 (ii) If, despite (i), such a delivery is accidentally attempted, the
565 routing retry time is respected, so at least it doesn't keep
566 hammering the server.
568 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
569 in ${readsocket because some servers need this prod.
571 PH/32 Added some extra debug output when updating a wait-xxx database.
573 PH/33 The hint "could be header name not terminated by colon", which has been
574 given for certain expansion errors for a long time, was not being given
575 for the ${if def:h_colon_omitted{... case.
577 PH/34 The spec says: "With one important exception, whenever a domain list is
578 being scanned, $domain contains the subject domain." There was at least
579 one case where this was not true.
581 PH/35 The error "getsockname() failed: connection reset by peer" was being
582 written to the panic log as well as the main log, but it isn't really
583 panic-worthy as it just means the connection died rather early on. I have
584 removed the panic log writing for the ECONNRESET error when getsockname()
587 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
588 runs only) independently of the message's sender address. This meant
589 that, if the 4xx error was in fact related to the sender, a different
590 message to the same recipient with a different sender could confuse
591 things. In particualar, this can happen when sending to a greylisting
592 server, but other circumstances could also provoke similar problems.
593 I have changed the default so that the retry time for these errors is now
594 based a combination of the sender and recipient addresses. This change
595 can be overridden by setting address_retry_include_sender=false in the
598 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
599 remote server are returned as part of bounce messages. This was not
600 happening for LMTP over a pipe (the lmtp transport), but now it is the
601 same for both kinds of LMTP.
603 PH/38 Despite being documented as not happening, Exim was rewriting addresses
604 in header lines that were in fact CNAMEs. This is no longer the case.
606 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
607 and queue runs started by the daemon processed all messages. This has
608 been fixed so that -R and -S can now usefully be given with -q<time>.
610 PH/40 Import PCRE release 6.7 (fixes some bugs).
612 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
614 PH/42 Give an error if -q is specified more than once.
616 PH/43 Renamed the variables $interface_address and $interface_port as
617 $received_ip_address and $received_port, to make it clear that these
618 values apply to message reception, and not to the outgoing interface when
619 a message is delivered. (The old names remain recognized, of course.)
621 PH/44 There was no timeout on the connect() call when using a Unix domain
622 socket in the ${readsocket expansion. There now is.
624 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
625 be meaningful with "accept".
627 SC/01 Eximstats V1.43
628 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
630 SC/02 Eximstats V1.44
631 Use a glob alias rather than an array ref in the generated
632 parser. This improves both readability and performance.
634 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
635 Collect SpamAssassin and rejection statistics.
636 Don't display local sender or destination tables unless
637 there is data to show.
638 Added average volumes into the top table text output.
640 SC/04 Eximstats V1.46
641 Collect data on the number of addresses (recipients)
642 as well as the number of messages.
644 SC/05 Eximstats V1.47
645 Added 'Message too big' to the list of mail rejection
646 reasons (thanks to Marco Gaiarin).
648 SC/06 Eximstats V1.48
649 Mainlog lines which have GMT offsets and are too short to
650 have a flag are now skipped.
652 SC/07 Eximstats V1.49 (Alain Williams)
653 Added the -emptyok flag.
655 SC/08 Eximstats V1.50
656 Fixes for obtaining the IP address from reject messages.
658 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
659 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
660 whitesspace changes from 4.64-PH/27
662 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
665 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
666 are found, allow negative numbers in numeric criteria)
668 JJ/06 exipick.20061117.2, added new $message_body_missing variable
670 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
671 to match changes made in 4.64-PH/43
673 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
675 PH/47 Put in an explicit test for a DNS lookup of an address record where the
676 "domain" is actually an IP address, and force a failure. This locks out
677 those revolvers/nameservers that support "A-for-A" lookups, in
678 contravention of the specifications.
680 PH/48 When a host name was looked up from an IP address, and the subsequent
681 forward lookup of the name timed out, the host name was left in
682 $sender_host_name, contrary to the specification.
684 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
685 restricted to single-key lookups, Exim was not diagnosing an error if
686 * or *@ was used with a query-style lookup.
688 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
690 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
691 long ago, but noone interested enough thought of it. Let's just say that
692 the "1.1" means that there are some new functions that weren't there at
693 some point in the past.
695 PH/51 Error processing for expansion failure of helo_data from an smtp
696 transport during callout processing was broken.
698 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
699 tested/used via the -bh/-bhc/-bs options.
701 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
702 bug, fixed in subsequent PCRE releases).
704 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
705 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
707 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
713 SC/01 Use a glob alias rather than an array ref in eximstats generated
714 parser. This improves both readability and performance.
716 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
717 Don't display local sender or destination tables in eximstats unless
718 there is data to show.
719 Added average volumes into the eximstats top table text output.
721 SC/03 Collect data on the number of addresses (recipients) as well
722 as the number of messages in eximstats.
724 TF/01 Correct an error in the documentation for the redirect router. Exim
725 does (usually) call initgroups() when daemonizing.
727 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
728 with consistent privilege compared to when running as a daemon.
730 TF/03 Note in the spec that $authenticated_id is not set for local
731 submissions from trusted users.
733 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
734 Thanks to Dean Brooks <dean@iglou.com> for the patch.
736 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
737 by adding some example configuration directives to the default
738 configuration file. A little bit of work is required to uncomment the
739 directives and define how usernames and passwords are checked, but
740 there is now a framework to start from.
742 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
743 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
744 without this. I don't know how relevant this is to other LDAP libraries.
746 PH/02 Add the verb name to the "unknown ACL verb" error.
748 PH/03 Magnus Holmgren's patch for filter_prepend_home.
750 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
752 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
753 directory not expanded when it should be if an expanded home directory
754 was set for the address (which is overridden by the transport).
756 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
759 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
760 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
761 because it is too late at that time, and has no effect.
763 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
764 security issue with \' (bugzilla #107). I could not use the
765 PQescapeStringConn() function, because it needs a PGconn value as one of
768 PH/08 When testing addresses using -bt, indicate those final addresses that
769 are duplicates that would not cause an additional delivery. At least one
770 person was confused, thinking that -bt output corresponded to deliveries.
771 (Suppressing duplicates isn't a good idea as you lose the information
772 about possibly different redirections that led to the duplicates.)
774 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
775 systems where poll() doesn't work, in particular OS X.
777 PH/10 Added more information to debugging output for retry time not reached.
779 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
780 operations in malware.c.
782 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
785 PH/13 If write_rejectlog was set false when logging was sent to syslog with
786 syslog_duplication set false, log lines that would normally be written
787 both the the main log and to the reject log were not written to syslog at
790 PH/14 In the default configuration, change the use of "message" in ACL warn
791 statements to "add_header".
793 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
794 not followed by a command (e.g. "seen endif").
796 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
797 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
800 PH/17 Added extra conditions to the default value of delay_warning_condition
804 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
805 { match{$h_precedence:}{(?i)bulk|list|junk} } \
806 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
809 The Auto-Submitted: and various List- headers are standardised, whereas I
810 don't think Precedence: ever was.
812 PH/18 Refactored debugging code in route_finduser() to show more information,
813 in particular, the error code if getpwnam() issues one.
815 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
816 This is apparently needed in addition to the PH/07 change above to avoid
817 any possible encoding problems.
819 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
820 but not after initializing Perl.
822 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
823 output them only if debugging. By default they are written stderr,
824 apparently, which is not desirable.
826 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
829 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
832 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
834 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
835 authenticated or an ident call has been made. Suppress the default
836 values for $authenticated_id and $authenticated_sender (but permit -oMai
837 and -oMas) when testing with -bh.
839 PH/24 Re-jigged the order of the tests in the default configuration so that the
840 tests for valid domains and recipients precede the DNS black list and CSA
841 tests, on the grounds that those ones are more expensive.
843 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
844 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
845 This bug exists in every version of Exim that I still have, right back to
848 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
849 However, an attempt to turn on case-sensitivity in a regex key by
850 including (?-i) didn't work because the subject string was already
851 lowercased, and the effects were non-intuitive. It turns out that a
852 one-line patch can be used to allow (?-i) to work as expected.
858 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
859 other effects) broke the use of negated acl sub-conditions.
861 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
864 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
865 "Deny" causes Exim to reject the incoming connection with a 554 error.
866 Unfortunately, if there is a major crisis, such as a disk failure,
867 tcp-wrappers gives "deny", whereas what one would like would be some
868 kind of temporary error. A kludge has been added to help with this.
869 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
870 554 error is used if errno is still zero or contains ENOENT (which occurs
871 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
874 PH/03 Add -lutil to the default FreeBSD LIBS setting.
876 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
877 errors. Otherwise a message that provokes a temporary error (when other
878 messages do not) can cause a whole host to time out.
880 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
881 addresses were routed directly to files or pipes from a redirect router.
882 File deliveries just didn't batch; pipe deliveries might have suffered
885 PH/06 A failure to get a lock for a hints database would erroneously always say
886 "Failed to get write lock", even when it was really a read lock.
888 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
889 of 0600. This has been changed to use the value of the lockfile_mode
890 option (which defaults to 0600).
892 PH/08 Applied small patch from the Sieve maintainer.
894 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
895 folder from quota calculations, a direct delivery into this folder messed
896 up the contents of the maildirsize file. This was because the regex was
897 used only to exclude .Trash (or whatever) when the size of the mailbox
898 was calculated. There was no check that a delivery was happening into an
899 excluded directory. This bug has been fixed by ignoring all quota
900 processing for deliveries into excluded directories.
902 PH/10 Added the maildirfolder_create_regex option to appendfile.
908 PH/01 The code for finding all the local interface addresses on a FreeBSD
909 system running IPv6 was broken. This may well have applied to all BSD
910 systems, as well as to others that have similar system calls. The broken
911 code found IPv4 interfaces correctly, but gave incorrect values for the
912 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
913 that it would not match correctly against @[] and not recognize the IPv6
916 PH/02 The ipliteral router was not recognizing addresses of the form user@
917 [ipv6:....] because it didn't know about the "ipv6:" prefix.
919 PH/03 Added disable_ipv6.
921 PH/04 Changed $reply_address to use the raw form of the headers instead of the
922 decoded form, because it is most often used to construct To: headers
923 lines in autoreplies, and the decoded form may well be syntactically
924 invalid. However, $reply_address has leading white space removed, and all
925 newlines turned into spaces so that the autoreply transport does not
928 PH/05 If group was specified without a user on a router, and no group or user
929 was specified on a transport, the group from the router was ignored.
931 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
932 for visible compile-time settings that can be used to change these
933 numbers, for those that want even more. Backwards compatibility with old
934 spool files has been maintained. However, going back to a previous Exim
935 release will lost any variables that are in spool files.
937 PH/07 Two small changes when running in the test harness: increase delay when
938 passing a TCP/IP connection to a new process, in case the original
939 process has to generate a bounce, and remove special handling of
940 127.0.0.2 (sic), which is no longer necessary.
942 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
943 be the same on different OS.
945 PH/09 Moved a debug statement in filter processing to avoid a race problem when
948 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
949 whether --show-vars was specified or not
951 JJ/02 exipick: Added support for new ACL variable spool format introduced
954 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
955 syntactically invalid From: or Reply-to: line, and a filter used this to
956 generate an autoreply, and therefore failed to obtain an address for the
957 autoreply, Exim could try to deliver to a non-existent relative file
958 name, causing unrelated and misleading errors. What now happens is that
959 it logs this as a hard delivery error, but does not attempt to create a
962 PH/11 The exinext utility has a -C option for testing purposes, but although
963 the given file was scanned by exinext itself; it wasn't being passed on
964 when Exim was called.
966 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
967 an end-of-file indication when reading a command response.
969 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
970 compiled. In many other places in Exim, IPv6 addresses are always
971 recognized, so I have changed this. It also means that IPv4 domain
972 literals of the form [IPV4:n.n.n.n] are now always recognized.
974 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
975 used if the router is not running as root, for example, when verifying at
976 ACL time, or when using -bh. The debugging output from this situation was
977 non-existent - all you got was a failure to exec. I have made two
980 (a) Failures to set uid/gid, the current directory, or a process leader
981 in a subprocess such as that created by queryprogram now generate
982 suitable debugging ouput when -d is set.
984 (b) The queryprogram router detects when it is not running as root,
985 outputs suitable debugging information if -d is set, and then runs
986 the subprocess without attempting to change uid/gid.
988 PH/15 Minor change to Makefile for building test_host (undocumented testing
991 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
992 additional section of a DNS packet that returns MX or SRV records.
993 Instead, it always explicitly searches for A/AAAA records. This avoids
994 major problems that occur when a DNS server includes only records of one
995 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
996 fixed another bug: if SRV records were looked up and the corresponding
997 address records were *not* found in the additional section, the port
998 values from the SRV records were lost.
1000 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1001 using the correct key (the original address) when searching the retry
1002 rules in order to find which one to use for generating the retry hint.
1004 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1005 adding the default one. Similarly, if it contains a Reply-To: header, the
1006 errors_reply_to option, if set, is not used.
1008 PH/19 When calculating a retry time, Exim used to measure the "time since
1009 failure" by looking at the "first failed" field in the retry record. Now
1010 it does not use this if it is later than than the arrival time of the
1011 message. Instead it uses the arrival time. This makes for better
1012 behaviour in cases where some deliveries succeed, thus re-setting the
1013 "first failed" field. An example is a quota failure for a huge message
1014 when small messages continue to be delivered. Without this change, the
1015 "time since failure" will always be short, possible causing more frequent
1016 delivery attempts for the huge message than are intended.
1017 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1019 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1020 $1, $2, $3) because the numerical variables can be reset during some
1021 expansion items (e.g. "match"), thereby losing the authentication data.
1023 PH/21 Make -bV show the size of off_t variables so that the test suite can
1024 decide whether to run tests for quotas > 2G.
1026 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1027 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1028 filecount value is greater than 2G or if a quota value is greater than 2G
1029 on a system where the size of off_t is not greater than 4, a panic error
1032 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1033 never match. The debug and -bh output now contains an explicit error
1034 message indicating a malformed IPv4 address or mask.
1036 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1037 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1038 PH/23 above applies.
1040 PH/25 Do not write to syslog when running in the test harness. The only
1041 occasion when this arises is a failure to open the main or panic logs
1042 (for which there is an explicit test).
1044 PH/26 Added the /no_tell option to "control=freeze".
1046 PH/27 If a host name lookup failed very early in a connection, for example, if
1047 the IP address matched host_lookup and the reverse lookup yielded a name
1048 that did not have a forward lookup, an error message of the form "no IP
1049 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1050 could be logged. Now it outputs the IP address instead of "NULL".
1052 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1053 allows the sender and the authenticated sender to be set when
1054 submitting a message from within Exim. Since child_open_exim() is
1055 documented for local_scan(), the new function should be too.
1057 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1058 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1059 results in an empty string is now treated as unset.
1061 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1063 PH/31 Added sender_verify_fail logging option.
1065 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1066 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1067 tidied the source and removed it altogether.
1069 PH/33 When a queue run was abandoned because the load average was too high, a
1070 log line was always written; now it is written only if the queue_run log
1071 selector is set. In addition, the log line for abandonment now contains
1072 information about the queue run such as the pid. This is always present
1073 in "start" and "stop" lines but was omitted from the "abandon" line.
1075 PH/34 Omit spaces between a header name and the colon in the error message that
1076 is given when verify = headers_syntax fails (if there are lots of them,
1077 the message gets confusing).
1079 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1080 names, as there are now some PTR records that contain slashes. This check
1081 is only to protect against broken name servers that fall over on strange
1082 characters, so the fact that it applies to all lookups doesn't matter.
1084 PH/36 Now that the new test suite is complete, we can remove some of the
1085 special code in Exim that was needed for the old test suite. For example,
1086 sorting DNS records because real resolvers return them in an arbitrary
1087 order. The new test suite's fake resolver always returns records in the
1090 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1091 bounces) except when queue_only is set, to avoid logging races between
1092 the different processes.
1094 PH/38 Panic-die if .include specifies a non-absolute path.
1096 PH/39 A tweak to the "H" retry rule from its user.
1098 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1099 a label. They prevented compilation on older perls.
1101 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1102 a warning to be raised on newish perls.
1104 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1105 on queue. Changes to match documented behaviour of showing count of
1106 messages matching specified criteria.
1108 PH/40 Changed the default ident timeout from 30s to 5s.
1110 PH/41 Added support for the use of login_cap features, on those BSD systems
1111 that have them, for controlling the resources used by pipe deliveries.
1113 PH/42 The content-scanning code uses fopen() to create files in which to put
1114 message data. Previously it was not paying any attention to the mode of
1115 the files. Exim runs with umask(0) because the rest of the code creates
1116 files with open(), and sets the required mode explicitly. Thus, these
1117 files were ending up world-writeable. This was not a big issue, because,
1118 being within the spool directory, they were not world-accessible. I have
1119 created a function called modefopen, which takes an additional mode
1120 argument. It sets umask(777), creates the file, chmods it to the required
1121 mode, then resets the umask. All the relevant calls to fopen() in the
1122 content scanning code have been changed to use this function.
1124 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1125 to 24 hours. This avoids potential overflow problems when processing G
1126 and H retry rules. I suspect nobody ever tinkers with this value.
1128 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1130 PH/45 When the plaintext authenticator is running as a client, the server's
1131 challenges are checked to ensure they are valid base64 strings. By
1132 default, the authentication attempt is cancelled if an invalid string is
1133 received. Setting client_ignore_invalid_base64 true ignores these errors.
1134 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1135 they are received. Thus, the responses can be made to depend on the
1136 challenges. If an invalid string is ignored, an empty string is placed in
1139 PH/46 Messages that are created by the autoreply transport now contains a
1140 References: header, in accordance with RFCs 2822 and 3834.
1142 PH/47 Added authenticated_sender_force to the smtp transport.
1144 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1146 PH/49 Installed latest patch from the Sieve maintainer.
1148 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1149 was also set, the appendfile transport was unnecessarily scanning a
1150 directory of message files (e.g. for maildir delivery) to find the count
1151 of files (along with the size), even though it did not need this
1152 information. It now does the scan only if it needs to find either the
1153 size of the count of files.
1155 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1157 PH/52 Two bugs concerned with error handling when the smtp transport is
1160 (i) Exim was not creating retry information for temporary errors given
1161 for individual recipients after the DATA command when the smtp transport
1162 was used in LMTP mode. This meant that they could be retried too
1163 frequently, and not timed out correctly.
1165 (ii) Exim was setting the flag that allows error details to be returned
1166 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1167 recipients that were returned after the DATA command.
1169 PH/53 This is related to PH/52, but is more general: for any failing address,
1170 when detailed error information was permitted to be returned to the
1171 sender, but the error was temporary, then after the final timeout, only
1172 "retry timeout exceeded" was returned. Now it returns the full error as
1173 well as "retry timeout exceeded".
1175 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1176 do this, and (what is worse) MTAs that accept it.
1178 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1179 will now be deprecated.
1181 PH/56 New os.c-cygwin from the Cygwin maintainer.
1183 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1184 formats (previously only available in exim formats via -bpr, -bpru,
1185 and -bpra. Now also available in native and exiqgrep formats)
1187 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1188 with very large, slow to parse queues
1190 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1192 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1194 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1195 responses to authentication challenges, though it was showing the
1196 challenges; (ii) I've removed the CR characters from the debug output for
1199 PH/58 Allow for the insertion of a newline as well as a space when a string
1200 is turned into more than one encoded-word during RFC 2047 encoding. The
1201 Sieve code now uses this.
1203 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1204 data_4xx, lost_connection, tls_required.
1206 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1207 message was being sent as an SMTP response.
1209 PH/61 Add -l and -k options to exicyclog.
1211 PH/62 When verifying, if an address was redirected to one new address, so that
1212 verification continued, and the new address failed or deferred after
1213 having set something in $address_data, the value of $address_data was not
1214 passed back to the ACL. This was different to the case when no
1215 redirection occurred. The value is now passed back in both cases.
1217 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1218 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1219 use login_cap.h, so on its own it isn't the distinguishing feature. The
1220 new name refers directly to the setclassresources() function.
1222 PH/65 Added configuration files for NetBSD3.
1224 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1226 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1227 is preferred over IPv4.
1229 PH/68 The bounce_return_message and bounce_return_body options were not being
1230 honoured for bounces generated during the reception of non-SMTP messages.
1231 In particular, this applied to messages rejected by the ACL. This bug has
1232 been fixed. However, if bounce_return_message is true and bounce_return_
1233 body is false, the headers that are returned for a non-SMTP message
1234 include only those that have been read before the error was detected.
1235 (In the case of an ACL rejection, they have all been read.)
1237 PH/69 The HTML version of the specification is now built in a directory called
1238 spec_html instead of spec.html, because the latter looks like a path with
1239 a MIME-type, and this confuses some software.
1241 PH/70 Catch two compiler warnings in sieve.c.
1243 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1244 function verify_get_ident() calls ip_connect() to connect a socket, but
1245 if the "connect()" function timed out, ip_connect() used to close the
1246 socket. However, verify_get_ident() also closes the socket later, and in
1247 between Exim writes to the log, which may get opened at this point. When
1248 the socket was closed in ip_connect(), the log could get the same file
1249 descriptor number as the socket. This naturally causes chaos. The fix is
1250 not to close the socket in ip_connect(); the socket should be closed by
1251 the function that creates it. There was only one place in the code where
1252 this was missing, in the iplookup router, which I don't think anybody now
1253 uses, but I've fixed it anyway.
1255 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1256 well as to direct DNS lookups. Otherwise the handling of names in host
1257 lists is inconsistent and therefore confusing.
1263 PH/01 Two changes to the default runtime configuration:
1265 (1) Move the checks for relay_from_hosts and authenticated clients from
1266 after to before the (commented out) DNS black list checks.
1268 (2) Add control=submission to the relay_from_hosts and authenticated
1269 clients checks, on the grounds that messages accepted by these
1270 statements are most likely to be submissions.
1272 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1274 (1) Generate an error if the third argument for the ${prvs expansion is
1277 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1280 (3) Reset the variables that are obtained from the first argument of
1281 ${prvscheck and used in the second argument before leaving the code,
1282 because their memory is reclaimed, so using them afterwards may do
1285 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1286 one (it's much easier than Tom thought :-).
1288 (5) Because of (4), we can now allow for the use of $prvscheck_result
1289 inside the third argument.
1291 PH/03 For some reason, the default setting of PATH when running a command from
1292 a pipe transport was just "/usr/bin". I have changed it to
1295 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1296 anything to be listed in the output from -bV.
1298 PH/05 When a filter generated an autoreply, the entire To: header line was
1299 quoted in the delivery log line, like this:
1301 => >A.N.Other <ano@some.domain> <original@ddress> ...
1303 This has been changed so that it extracts the operative address. There
1304 may be more than one such address. If so, they are comma-separated, like
1307 => >ano@some.domain,ona@other.domain <original@ddress> ...
1309 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1310 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1311 not being looked up in the rDNS to get a host name, Exim was showing the
1312 IP address twice in Received: lines, even though the IP addresses were
1313 identical. For example:
1315 Received: from [1.2.3.4] (helo=[1.2.3.4])
1317 However, if the real host name was known, it was omitting the HELO data
1318 if it matched the actual IP address. This has been tidied up so that it
1319 doesn't show the same IP address twice.
1321 PH/07 When both +timestamp and +memory debugging was on, the value given by
1322 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1323 called by the debug printing, thereby overwriting the timestamp buffer.
1324 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1326 PH/08 When the original message was included in an autoreply transport, it
1327 always said "this is a copy of the message, including all the headers",
1328 even if body_only or headers_only was set. It now gives an appropriate
1331 PH/09 Applied a patch from the Sieve maintainer which:
1333 o fixes some comments
1334 o adds the (disabled) notify extension core
1335 o adds some debug output for the result of if/elsif tests
1336 o points to the current vacation draft in the documentation
1337 and documents the missing references header update
1341 o fixes a bug in processing the envelope test (when testing
1342 multiple envelope elements, the last element determinted the
1345 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1346 Electronic Mail") by including:
1348 Auto-submitted: auto-generated
1350 in the messages that it generates (bounce messages and others, such as
1351 warnings). In the case of bounce messages for non-SMTP mesages, there was
1352 also a typo: it was using "Auto_submitted" (underscore instead of
1353 hyphen). Since every message generated by Exim is necessarily in response
1354 to another message, thes have all been changed to:
1356 Auto-Submitted: auto-replied
1358 in accordance with these statements in the RFC:
1360 The auto-replied keyword:
1362 - SHOULD be used on messages sent in direct response to another
1363 message by an automatic process,
1365 - MUST NOT be used on manually-generated messages,
1367 - MAY be used on Delivery Status Notifications (DSNs) and Message
1368 Disposition Notifications (MDNs),
1370 - MUST NOT be used on messages generated by automatic or periodic
1371 processes, except for messages which are automatic responses to
1374 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1375 to the default Received: header definition.
1377 PH/12 Added log selector acl_warn_skipped (default on).
1379 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1380 variables because (a) they are in the wrong storage pool and (b) even if
1381 they were copied, it wouldn't work properly because of the caching.
1383 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1384 checking when decoding. Apparently there are clients that generate
1385 overlong encoded strings. Why am I not surprised?
1387 PH/15 If the first argument of "${if match_address" was not empty, but did not
1388 contain an "@" character, Exim crashed. Now it writes a panic log message
1389 and treats the condition as false.
1391 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1393 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1394 extension "envelope-auth". The code is finished and in agreement with
1395 other implementations, but there is no documentation so far and in fact,
1396 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1397 not changing the active code.
1399 Print executed "if" and "elsif" statements when debugging is used. This
1400 helps a great deal to understand what a filter does.
1402 Document more things not specified clearly in RFC3028. I had all this
1403 sorted out, when out of a sudden new issues came to my mind. Oops."
1405 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1408 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1409 canonical form (as documented). However, after a host name lookup from
1410 the IP address, check_host() was doing a simple string comparison with
1411 addresses acquired from the DNS when checking that the found name did
1412 have the original IP as one of its addresses. Since any found IPv6
1413 addresses are likely to be in abbreviated form, the comparison could
1414 fail. Luckily, there already exists a function for doing the comparison
1415 by converting both addresses to binary, so now that is used instead of
1416 the text comparison.
1418 PH/20 There was another similar case to PH/19, when a complete host name was
1419 given in a host list; looking up its IP address could give an abbreviated
1420 form, whereas the current host's name might or might not be abbreviated.
1421 The same fix has been applied.
1427 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1428 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1431 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1432 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1434 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1436 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1437 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1438 Also, for "Auto-Submitted", treat anything other than "no" as
1439 non-personal, in accordance with RFC 3834. (Previously it treated
1440 anything starting "auto-" as non-personal.)
1442 TF/01 The control=submission/name=... option had a problem with syntax
1443 errors if the name included a slash character. The /name= option
1444 now slurps the rest of the string, so it can include any characters
1445 but it must come last in the list of options (after /sender_retain
1448 PH/05 Some modifications to the interface to the fake nameserver for the new
1456 TK/01 Added the "success_on_redirect" address verification option. See
1457 NewStuff for rationale and an example.
1459 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1461 PH/02 Patch to exigrep to allow it to work on syslog lines.
1463 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1464 fread() to skip over the body file's header line, because in Cygwin the
1465 header line is locked and is inaccessible.
1467 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1468 co-exist for some time) to make it clear that it is the Exim ID that is
1469 referenced, not the Message-ID: header line.
1471 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1472 string_format() function, because snprintf() does not exist on all
1475 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1476 ${stat: expansion item.
1478 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1479 protocol synchronization error", to keep the pedants happy.
1481 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1482 well as for IRIX systems, when gcc is being used. See the host.c source
1485 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1487 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1490 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1491 transport and to the smtp transport in LMTP mode.
1493 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1495 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1496 run a filter in a subprocess. This could lead to confusion in subsequent
1497 lookups in the parent process. There should also be a search_tidyup() at
1498 the end of the subprocess.
1500 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1501 only if the host matched helo_try_verify_hosts, which caused the
1502 verification to occur when the EHLO/HELO command was issued. The ACL just
1503 tested the remembered result. Now, if a previous verification attempt has
1504 not happened, "verify = helo" does it there and then.
1506 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1508 TK/03 Fix log output including CR from clamd.
1510 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1511 exist provoked a memory error which could cause a segfault.
1513 PH/15 Installed PCRE 6.2
1515 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1517 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1518 of the problem. Specifically, suggested +O2 rather than +O1 for the
1521 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1523 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1524 record, the port was not correctly logged when the outgoing_port log
1525 selector was set (it logged the transort's default port).
1527 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1528 fallback_hosts, and "hosts" in the smtp transport.
1530 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1531 host errors such as "Connection refused".
1533 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1534 authentication with radiusclient 0.4.9:
1536 - Error returned from rc_read_config was caught wrongly
1537 - Username/password not passed on to radius server due to wrong length.
1539 The presumption is that some radiusclient API changes for 4.51/PH/17
1540 were not taken care of correctly. The code is still untested by me (my
1541 Linux distribution still has 0.3.2 of radiusclient), but it was
1542 contributed by a Radius user.
1544 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1545 expanding the "port" option of the smtp transport.
1547 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1548 while reading a MIME header. Thanks to Tom Hughes for a patch.
1550 PH/24 Include config.h inside local_scan.h so that configuration settings are
1553 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1554 that in an ACL for RCPT (for example), you can examine exactly what was
1557 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1558 commands, but it was not correctly comparing the address with the actual
1559 client host address. Thus, it would show the EHLO address in Received:
1560 header lines when this was not necessary.
1562 PH/27 Added the % operator to ${eval:}.
1564 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1565 it should be ignoring failures (because with -C, for example, it has lost
1566 privilege). It wasn't ignoring creation failures other than "already
1569 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1572 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1573 because an input line was too long, either on its own, or by virtue of
1574 too many continuations, the temporary file was not being removed, and the
1575 return code was incorrect.
1577 PH/31 Missing "BOOL" in function definition in filtertest.c.
1579 PH/32 Applied Sieve patches from the maintainer.
1581 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1583 PH/33 Added "verify = not_blind".
1585 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1586 Local/Makefile (with some defaults set). These are used in built scripts
1587 such as exicyclog, but they have never been used in the exim_install
1588 script (though there are many overriding facilities there). I have
1589 arranged that the exim_install script now takes note of these two
1592 PH/35 Installed configuration files for Dragonfly.
1594 PH/36 When a locally submitted message by a trusted user did not contain a
1595 From: header, and the sender address was obtained from -f or from an SMTP
1596 MAIL command, and the trusted user did not use -F to supply a sender
1597 name, $originator_name was incorrectly used when constructing a From:
1598 header. Furthermore, $originator_name was used for submission mode
1599 messages from external hosts without From: headers in a similar way,
1600 which is clearly wrong.
1602 PH/37 Added control=suppress_local_fixups.
1604 PH/38 When log_selector = +received_sender was set, and the addition of the
1605 sender made the log line's construction buffer exactly full, or one byte
1606 less than full, an overflow happened when the terminating "\n" was
1609 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1610 when the result of a list match is failure because a DNS lookup failed.
1612 PH/40 RM_COMMAND is now used in the building process.
1614 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1615 the "build-* directories that it finds.
1617 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1618 address in a domain literal was a prefix of an interface address.
1620 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1621 when verifying a sender address, unless rewrite_headers is false.
1623 PH/44 Wrote a long comment about why errors_to addresses are verified as
1624 recipients, not senders.
1626 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1627 the ratelimit ACL was added.
1629 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1631 PH/46 Added extra information about PostgreSQL errors to the error string.
1633 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1634 avoiding the need to install special zones in a real server. This is
1635 backwards compatible; if it can't find the fake resolver, it drops back.
1636 Thus, both old and new test suites can be run.
1638 TF/02 Added util/ratelimit.pl
1640 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1641 clock is set back in time.
1643 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1644 Candler <B.Candler@pobox.com>.
1646 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1647 OK for addresses that are the result of redirections.
1649 PH/48 A number of further additions for the benefit of the new test suite,
1650 including a fake gethostbyname() that interfaces to the fake DNS resolver
1653 TF/06 The fix for widen_domains has also been applied to qualify_single and
1654 search_parents which are the other dnslookup options that can cause
1657 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1660 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1662 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1663 service" if it encountered an MX record with an empty target hostname.
1664 The message is now "an MX or SRV record indicated no SMTP service".
1666 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1667 if the DNS of the sending site is misconfigured. This is quite a
1668 common situation. This change restores the behaviour of treating a
1669 helo verification defer as a failure.
1671 PH/51 If self=fail was set on a router, the bounce message did not include the
1672 actual error message.
1678 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1680 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1681 command itself ended in error, the underlying message about the transport
1682 filter timeout was being overwritten with the pipe command error. Now the
1683 underlying error message should be appended to the second error message.
1685 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1687 PH/02 Reduce the amount of output that "make" produces by default. Full output
1688 can still be requested.
1690 PH/03 The warning log line about a condition test deferring for a "warn" verb
1691 was being output only once per connection, rather than after each
1692 occurrence (because it was using the same function as for successful
1693 "warn" verbs). This seems wrong, so I have changed it.
1695 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1696 it should not have, which might have caused a crash in the right
1697 circumstances, but probably never did.
1699 PH/04 Installed a modified version of Tony Finch's patch to make submission
1700 mode fix the return path as well as the Sender: header line, and to
1701 add a /name= option so that you can make the user's friendly name appear
1704 TF/03 Added the control = fakedefer ACL modifier.
1706 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1707 Mark Lowes for thorough testing.
1709 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1711 TK/03 Merged latest SRS patch from Miles Wilton.
1713 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1714 with the definition in sysexits.h (which is #included earlier).
1715 Fortunately, Exim does not actually use EX_OK. The code used to try to
1716 preserve the sysexits.h value, by assumimg that macro definitions were
1717 scanned for macro replacements. I have been disabused of this notion,
1718 so now the code just undefines EX_OK before #including unistd.h.
1720 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1721 in the smtp transport. When a block could not be written in a single
1722 write() function, the timeout was being re-applied to each part-write.
1723 This seems wrong - if the receiver was accepting one byte at a time it
1724 would take for ever. The timeout is now adjusted when this happens. It
1725 doesn't have to be particularly precise.
1727 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1728 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1730 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1731 without a domain if the check to <postmaster@domain> fails.
1733 SC/01 Eximstats: added -xls and the ability to specify output files
1734 (patch written by Frank Heydlauf).
1736 SC/02 Eximstats: use FileHandles for outputing results.
1738 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1740 SC/04 Eximstats: fixed display of large numbers with -nvr option
1742 SC/05 Eximstats: fixed merging of reports with empty tables.
1744 SC/06 Eximstats: added the -include_original_destination flag
1746 SC/07 Eximstats: removed tabs and trailing whitespace.
1748 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1750 TK/06 MBOX spool code: Add real "From " MBOX separator line
1751 so the .eml file is really in mbox format (even though
1752 most programs do not really care). Patch from Alex Miller.
1754 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1755 The latter is generated from $received_to and is only set if the
1756 message has one envelope recipient. SA can use these headers,
1757 obviously out-of-the-box. Patch from Alex Miller.
1759 PH/08 The ${def test on a variable was returning false if the variable's
1760 value was "0", contrary to what the specification has always said!
1761 The result should be true unless the variable is empty.
1763 PH/09 The syntax error of a character other than { following "${if
1764 def:variable_name" (after optional whitespace) was not being diagnosed.
1765 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1766 accidental colon was present, for example, could give incorrect results.
1768 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1769 result is used (not including appendfile, where other changes are about
1772 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1773 This involved changing a lot of size variables from int to off_t. It
1774 should work with maildirs and everything.
1776 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1777 spamd dying while we are connected to it.
1779 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1782 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1783 function for BDB 4.3.
1785 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1787 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1788 the sources for PCRE have been re-arranged and more files are now
1791 PH/15 The code I had for printing potentially long long variables in PH/11
1792 above was not the best (it lost precision). The length of off_t variables
1793 is now inspected at build time, and an appropriate printing format (%ld
1794 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1795 to be "long long int" or "long int". This is needed for the internal
1796 formatting function string_vformat().
1798 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1799 the configuration file to be ":syslog", then the script "guesses" where
1800 the logs files are, rather than using the compiled in default. In our
1801 case the guess is not the same as the compiled default, so the script
1802 suddenly stopped working when I started to use syslog. The patch checks
1803 to see if log_file_path is "". If so, it attempts to read it from exim
1804 with no configuration file to get the compiled in version, before it
1805 falls back to the previous guessing code."
1807 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1808 implementing BATV in an Exim configuration. See NewStuff for the gory
1811 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1812 Makefile that are specific to HP-UX.
1814 PH/18 If the "use_postmaster" option was set for a recipient callout together
1815 with the "random" option, the postmaster address was used as the MAIL
1816 FROM address for the random test, but not for the subsequent recipient
1817 test. It is now used for both.
1819 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1820 patch removes a few documentation additions to RFC 3028, because the
1821 latest draft now contains them. It adds the new en;ascii-case comparator
1822 and a new error check for 8bit text in MIME parts. Comparator and
1823 require names are now matched exactly. I enabled the subaddress
1824 extension, but it is not well tested yet (read: it works for me)."
1826 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1827 rework some of the code of TK/09 above to avoid the hardwired use of
1828 "%lld" and "long long". Replaced the call to snprintf() with a call to
1831 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1832 records point to non-existent hosts", "retry timeout exceeded", and
1833 "retry time not reached for any host after a long failure period".
1835 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1836 experimental DomainKeys support:
1838 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1839 (2) On an error such as an illegally used "control", the wrong name for
1840 the control was given.
1842 These problems did NOT occur unless DomainKeys support was compiled.
1844 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1846 PH/24 Added ${if match_ip condition.
1848 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1849 databases so that it will be absolutely obvious if a crash occurs in the
1850 DB library. This is a regular occurrence (often caused by mis-matched
1853 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1854 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1855 picked up on a user's system that detects such things. There doesn't seem
1856 to be a gcc warning option for this - only an attribute that has to be
1857 put on the function's prototype. It seems that in Fedora Core 4 they have
1858 set this on a number of new functions. No doubt there will be more in due
1861 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1862 specify a transport. However, if an address that was verified by such a
1863 router was the subject of a callout, Exim crashed because it tried to
1864 read the rcpt_include_affixes from the non-existent transport. Now it
1865 just assumes that the setting of that option is false. This bug was
1866 introduced by 4.51/PH/31.
1868 PH/28 Changed -d+all to exclude +memory, because that information is very
1869 rarely of interest, but it makes the output a lot bigger. People tend to
1870 do -d+all out of habit.
1872 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1873 code in os-type was giving problems when libc.so lives in lib64, like on
1876 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1877 aren't the modern standard, and it seems that some systems' include files
1878 don't always have them. Exim was already checking for some of the newer
1879 ones like T_AAAA, and defining it itself. I've added checks for all the
1880 record types that Exim uses.
1882 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1883 not automatically generating a new one, as it is supposed to. This
1884 prevented TLS from working. If the file did exist, but contained invalid
1885 data, a new version was generated, as expected. It was only the case of a
1886 non-existent file that was broken.
1888 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1889 with a change in libdomainkeys > 0.64.
1891 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1892 from DNS. If the selector record carries the flag, it now has
1893 precedence over the domain-wide flag.
1895 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1897 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1898 the use of a port name that isn't defined in /etc/services) occurred, the
1899 message was deferred as in a normal delivery, and thus remained on the
1900 spool, instead of being failed because of the mua_wrapper setting. This
1901 is now fixed, and I tidied up some of the mua_wrapper messages at the
1904 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1905 the messages in a hash of arrays rather than using individual hashes.
1906 This is a bit cleaner and results in dramatic memory savings, albeit
1907 at a slight CPU cost.
1909 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1910 as requested by Marc Sherman.
1912 SC/10 Eximstats: added histograms for user specified patterns as requested
1915 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1917 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1918 fopen() in the content-scanning modules that did not already have it.
1924 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1925 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1927 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1929 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1931 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1932 to test Sieve filters that use "vacation".
1934 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1935 that changes the way the GnuTLS parameters are stored in the cache file.
1936 The new format can be generated externally. For backward compatibility,
1937 if the data in the cache doesn't make sense, Exim assumes it has read an
1938 old-format file, and it generates new data and writes a new file. This
1939 means that you can't go back to an older release without removing the
1942 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1943 work if there are any delivery delays because "one_time" forces the
1944 parent to be marked "delivered", so its unseen clone is never tried
1945 again. For this reason, Exim now forbids the simultaneous setting of
1948 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1949 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1950 entry if you want to know the details. The fix, however, neglected to
1951 consider the case when local delivery batching is involved. The test for
1952 "previously delivered" was not happening when checking to see if an
1953 address could be batched with a previous (undelivered) one; under
1954 certain circumstances this could lead to multiple deliveries to the same
1957 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1958 in its include files, and this causes problems building Exim.
1960 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1961 header_syntax) but Exim was just ignoring anything given after a slash.
1962 In particular, this caused confusion with an attempt to use "verify =
1963 reverse_host_lookup/defer_ok". An error is now given when options are
1964 supplied for verify items that do not have them. (Maybe reverse_host_
1965 lookup should have a defer_ok option, but that's a different point.)
1967 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1968 defined by RFC 821) to 2048, because there were problems with some AUTH
1969 commands, and RFC 1869 says the size should be increased for extended
1970 SMTP commands that take arguments.
1972 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1975 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1976 "unknown" error; now it says that the functionality isn't in the binary.
1978 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1979 an address' error message when a string expansion fails (syntax or
1980 whatever). Otherwise the password may appear in the log. Following change
1981 PH/42 below, there is no longer a chance of it appearing in a bounce
1984 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1986 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1987 of its addresses was ever tried. (Bugzilla bug #2.)
1989 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1990 the result incorrectly in the debug output. (It correctly added a newline
1991 to what was transported.)
1993 TF/01 Added $received_time.
1995 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1996 commented out examples of how to interface to a virus scanner and to
1997 SpamAssassin. Also added commented examples of av_scanner and
1998 spamd_address settings.
2000 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2001 and controls are allowed in which ACLs. There were a couple of minor
2002 errors. Some of the entries in the conditions table (which is a table of
2003 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2004 negation of where the condition IS allowed.
2006 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2008 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2009 header file does not have a version number, so I've had to invent a new
2010 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2011 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2012 radiusclient), but it was contributed by a Radius user.
2014 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2015 files or directories, for OpenSSL.
2017 PH/19 When an Exim process that is running as root has to create an Exim log
2018 file, it does so in a subprocess that runs as exim:exim so as to get the
2019 ownership right at creation (otherwise, other Exim processes might see
2020 the file with the wrong ownership). There was no test for failure of this
2021 fork() call, which would lead to the process getting stuck as it waited
2022 for a non-existent subprocess. Forks do occasionally fail when resources
2023 run out. I reviewed all the other calls to fork(); they all seem to check
2026 PH/20 When checking for unexpected SMTP input at connect time (before writing
2027 the banner), Exim was not dealing correctly with a non-positive return
2028 from the read() function. If the client had disconnected by this time,
2029 the result was a log entry for a synchronization error with an empty
2030 string after "input=" when read() returned zero. If read() returned -1
2031 (an event I could not check), uninitialized data bytes were printed.
2032 There were reports of junk text (parts of files, etc) appearing after
2035 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2037 PH/22 Added support for macro redefinition, and (re)definition in between
2038 driver and ACL definitions.
2040 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2041 forgetting to use the resulting value; it was using the unexpanded value.
2043 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2044 hadn't been configured. The fix is from Juergen Kreileder, who
2045 understands it better than I do:
2047 "Here's what I see happening with three configured cyrus_sasl
2048 authenticators configured (plain, login, cram-md5):
2050 On startup auth_cyrus_sasl_init() gets called for each of these.
2051 This means three calls to sasl_listmech() without a specified mech_list.
2052 => SASL tests which mechs of all available mechs actually work
2053 => three warnings about OTP not working
2054 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2056 With the patch, sasl_listmech() also gets called three times. But now
2057 SASL's mech_list option is set to the server_mech specified in the the
2058 authenticator. Or in other words, the answer from sasl_listmech()
2059 gets limited to just the mech you're testing for (which is different
2061 => the return list contains just 'plain' or 'login', 'cram-md5' or
2062 nothing depending on the value of ob->server_mech.
2064 I've just tested the patch: Authentication still works fine,
2065 unavailable mechs specified in the exim configuration are still
2066 caught, and the auth.log warnings about OTP are gone."
2068 PH/25 When debugging is enabled, the contents of the command line are added
2069 to the debugging output, even when log_selector=+arguments is not
2072 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2073 answer is "GNU", and only if the return is "GNU/something" is the answer
2076 PH/27 $acl_verify_message is now set immediately after the failure of a
2077 verification in an ACL, and so is available in subsequent modifiers. In
2078 particular, the message can be preserved by coding like this:
2080 warn !verify = sender
2081 set acl_m0 = $acl_verify_message
2083 Previously, $acl_verify_message was set only while expanding "message"
2084 and "log_message" when a very denied access.
2086 PH/28 Modified OS/os.c-Linux with
2088 -#ifndef OS_LOAD_AVERAGE
2089 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2091 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2092 nomenclature these days.)
2094 PH/29 Installed patch from the Sieve maintainer that adds the options
2095 sieve_useraddress and sieve_subaddress to the redirect router.
2097 PH/30 In these circumstances:
2098 . Two addresses routed to the same list of hosts;
2099 . First host does not offer TLS;
2100 . First host accepts first address;
2101 . First host gives temporary error to second address;
2102 . Second host offers TLS and a TLS session is established;
2103 . Second host accepts second address.
2104 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2105 and peerdn, if requested) that were in fact used only for the second
2108 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2109 attention to any local part prefix or suffix that was matched by the
2110 router that accepted the address. It now behaves in the same way as it
2111 does for delivery: the affixes are removed from the local part unless
2112 rcpt_include_affixes is set on the transport.
2114 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2115 timeout during the DATA phase of an incoming message.
2117 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2118 applied a patch sanctioned by the Sieve maintainer.
2120 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2121 the uid or gid is negative. A case of a negative gid caused this to be
2122 noticed. The fix allows for either to be negative.
2124 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2125 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2128 PH/36 The change PH/12 above was broken. Fixed it.
2130 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2131 the grounds that routing the same address twice would always produce the
2132 same answer. This might have been true once, but it is certainly no
2133 longer true now. Routing a child address may depend on the previous
2134 routing that produced that child. Some complicated redirection strategies
2135 went wrong when messages had multiple recipients, and made Exim's
2136 behaviour dependent on the order in which the addresses were given.
2138 I have moved the duplicate checking until after the routing is complete.
2139 Exim scans the addresses that are assigned to local and remote
2140 transports, and removes any duplicates. This means that more work will be
2141 done, as duplicates will always all be routed, but duplicates are
2142 presumably rare, so I don't expect this is of any significance.
2144 For deliveries to pipes, files, and autoreplies, the duplicate checking
2145 still happens during the routing process, since they are not going to be
2148 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2149 It corrects a timeout issue with spamd. This is Ian's comment: "The
2150 background is that sometimes spamd either never reads data from a
2151 connection it has accepted, or it never writes response data. The exiscan
2152 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2153 blindly assumes that writes won't block so it may never time out."
2155 PH/39 Allow G after quota size as well as K and M.
2157 PH/40 The value set for $authenticated_id in an authenticator may not contain
2158 binary zeroes or newlines because the value is written to log lines and
2159 to spool files. There was no check on this. Now the value is run through
2160 the string_printing() function so that such characters are converted to
2161 printable escape sequences.
2163 PH/41 $message_linecount is a new variable that contains the total number of
2164 lines in the message. Compare $body_linecount, which is the count for the
2167 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2168 bounce and delay warning messages, except in certain special cases, which
2171 (a) An SMTP error message from a remote host;
2172 (b) A message specified in a :fail: redirection;
2173 (c) A message specified in a "fail" command in a system filter;
2174 (d) A message specified in a FAIL return from the queryprogram router;
2175 (e) A message specified by the cannot_route_message router option.
2177 In these cases only, Exim does include the error details in bounce and
2178 warning messages. There are also a few cases where bland messages such
2179 as "unrouteable address" or "local delivery error" are given.
2181 PH/43 $value is now also set for the "else" part of a ${run expansion.
2183 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2184 being worked on, but at least Exim now implements the latest version to
2187 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2188 process to complete was treated as a delivery failure, a timeout while
2189 writing the message to the pipe was logged, but erroneously treated as a
2190 successful delivery. Such timeouts include transport filter timeouts. For
2191 consistency with the overall process timeout, these timeouts are now
2192 treated as errors, giving rise to delivery failures by default. However,
2193 there is now a new Boolean option for the pipe transport called
2194 timeout_defer, which, if set TRUE, converts the failures into defers for
2195 both kinds of timeout. A transport filter timeout is now identified in
2198 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2199 systems where "make" and "gmake" are different, calling "gmake" at top
2200 level broke things. I've arranged for the value of $(MAKE) to be passed
2201 from the Makefile to this script so that it can call the same version of
2205 A note about Exim versions 4.44 and 4.50
2206 ----------------------------------------
2208 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2209 changes of various kinds. As a consequence, a big documentation update was
2210 needed. This delayed the release for rather longer than seemed good, especially
2211 in the light of a couple of (minor) security issues. Therefore, the changes
2212 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2213 release. So 4.44 and 4.50 are in effect two different branches that both start
2216 I have left the 4.50 change log unchanged; it contains all the changes since
2217 4.43. The change log for 4.44 is below; many of its items are identical to
2218 those for 4.50. This seems to be the most sensible way to preserve the
2219 historical information.
2225 1. Minor wording change to the doc/README.SIEVE file.
2227 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2228 computation of the current number of files was incorrect.
2230 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2231 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2234 4. Give more explanation in the error message when the command for a transport
2235 filter fails to execute.
2237 5. There are several places where Exim runs a non-Exim command in a
2238 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2239 was being done only for the command run by the queryprogram router. It is
2240 now done for all such subprocesses. The other cases are: ${run, transport
2241 filters, and the commands run by the lmtp and pipe transports.
2243 6. Added CONFIGURE_GROUP build-time option.
2245 7. Some older OS have a limit of 256 on the maximum number of file
2246 descriptors. Exim was using setrlimit() to set 1000 as a large value
2247 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2248 systems. I've change it so that if it can't get 1000, it tries for 256.
2250 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2251 was an oversight, and furthermore, ever since the addition of extra
2252 controls (e.g. 4.43/32), the checks on when to allow different forms of
2253 "control" were broken. There should now be diagnostics for all cases when a
2254 control that does not make sense is encountered.
2256 9. Added the /retain_sender option to "control=submission".
2258 10. $recipients is now available in the predata ACL (oversight).
2260 11. Tidy the search cache before the fork to do a delivery from a message
2261 received from the command line. Otherwise the child will trigger a lookup
2262 failure and thereby defer the delivery if it tries to use (for example) a
2263 cached ldap connection that the parent has called unbind on.
2265 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2266 of $address_data from the recipient verification was clobbered by the
2267 sender verification.
2269 13. The value of address_data from a sender verification is now available in
2270 $sender_address_data in subsequent conditions in the ACL statement.
2272 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2274 15. Added a new option "connect=<time>" to callout options, to set a different
2277 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2278 was its contents. (It was OK if the option was not defined at all.)
2280 17. A "Completed" log line is now written for messages that are removed from
2281 the spool by the -Mrm option.
2283 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2284 information about exactly what failed.
2286 19. Added -dd to debug only the daemon process.
2288 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2289 handles timeouts, both on the server side and network timeouts. Renamed the
2290 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2292 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2293 It is now set to "smtps".
2295 22. $host_address is now set to the target address during the checking of
2296 ignore_target_hosts.
2298 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2299 being passed; this would have caused $sender_host_name to have been used if
2300 matching the list had actually called for a host name (not very likely,
2301 since this list is usually IP addresses). A host name is now passed as
2304 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2305 code that specifies a non-restarting handler (typically sigaction() in
2306 modern systems) in an attempt to fix a rare and obscure crash bug.
2308 25. Narrowed the window for a race in the daemon that could cause it to ignore
2309 SIGCHLD signals. This is not a major problem, because they are used only to
2310 wake it up if nothing else does.
2312 26. A malformed maildirsize file could cause Exim to calculate negative values
2313 for the mailbox size or file count. Odd effects could occur as a result.
2314 The maildirsize information is now recalculated if the size or filecount
2317 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2318 support for a long time. Removed HAVE_SYS_VFS_H.
2320 28. Installed the latest version of exipick from John Jetmore.
2322 29. In an address list, if the pattern was not a regular expression, an empty
2323 subject address (from a bounce message) matched only if the pattern was an
2324 empty string. Non-empty patterns were not even tested. This was the wrong
2325 because it is perfectly reasonable to use an empty address as part of a
2326 database query. An empty address is now tested by patterns that are
2327 lookups. However, all the other forms of pattern expect the subject to
2328 contain a local part and a domain, and therefore, for them, an empty
2329 address still always fails if the pattern is not itself empty.
2331 30. Exim went into a mad DNS loop when attempting to do a callout where the
2332 host was specified on an smtp transport, and looking it up yielded more
2333 than one IP address.
2335 31. Re-factored the code for checking spool and log partition space into a
2336 function that finds that data and another that does the check. The former
2337 is then used to implement four new variables: $spool_space, $log_space,
2338 $spool_inodes, and $log_inodes.
2340 32. The RFC2047 encoding function was originally intended for short strings
2341 such as real names; it was not keeping to the 75-character limit for
2342 encoded words that the RFC imposes. It now respects the limit, and
2343 generates multiple encoded words if necessary. To be on the safe side, I
2344 have increased the buffer size for the ${rfc2047: expansion operator from
2347 33. It is now permitted to omit both strings after an "if" condition; if the
2348 condition is true, the result is "true". As before, when the second string
2349 is omitted, a false condition yields an empty string. This makes it less
2350 cumbersome to write custom ACL and router conditions.
2352 34. Failure to deliver a bounce message always caused it to be frozen, even if
2353 there was an errors_to setting on the router. The errors_to setting is now
2356 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2357 canonical form (fully expanded) before being placed in
2358 $sender_host_address.
2360 36. The table in the code that translates DNS record types into text (T_A to
2361 "A" for instance) was missing entries for NS and CNAME. It is just possible
2362 that this could have caused confusion if both these types were looked up
2363 for the same domain, because the text type is used as part of Exim's
2364 per-process caching. But the chance of anyone hitting this buglet seems
2367 37. The dnsdb lookup has been extended in a number of ways.
2369 (1) There is a new type, "zns", which walks up the domain tree until it
2370 finds some nameserver records. It should be used with care.
2372 (2) There is a new type, "mxh", which is like "mx" except that it returns
2373 just the host names, not the priorities.
2375 (3) It is now possible to give a list of domains (or IP addresses) to be
2376 looked up. The behaviour when one of the lookups defers can be
2377 controlled by a keyword.
2379 (4) It is now possible to specify the separator character for use when
2380 multiple records are returned.
2382 38. The dnslists ACL condition has been extended: it is now possible to supply
2383 a list of IP addresses and/or domains to be looked up in a particular DNS
2386 39. Added log_selector=+queue_time_overall.
2388 40. When running the queue in the test harness, wait just a tad after forking a
2389 delivery process, to get repeatability of debugging output.
2391 41. Include certificate and key file names in error message when GnuTLS fails
2392 to set them up, because the GnuTLS error message doesn't include the name
2393 of the failing file when there is a problem reading it.
2395 42. Allow both -bf and -bF in the same test run.
2397 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2399 44. The "Exiscan patch" is now merged into the mainline Exim source.
2401 45. Sometimes the final signoff response after QUIT could fail to get
2402 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2403 < 0 before doing a fflush(). This bug looks as though it goes back to the
2404 introduction of TLS in release 3.20, but "sometimes" must have been rare
2405 because the tests only now provoked it.
2407 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2408 (this can affect the format of dates).
2410 47. exim_tidydb, when checking for the continued existence of a message for
2411 which it has found a message-specific retry record, was not finding
2412 messages that were in split spool directories. Consequently, it was
2413 deleting retry records that should have stayed in existence.
2415 48. Steve fixed some bugs in eximstats.
2417 49. The SPA authentication driver was not abandoning authentication and moving
2418 on to the next authenticator when an expansion was forced to fail,
2419 contradicting the general specification for all authenticators. Instead it
2420 was generating a temporary error. It now behaves as specified.
2422 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2423 (the order specifies the preference for clients). The order is now AES256,
2424 AES128, 3DES, ARCFOUR128.
2426 51. Small patch to Sieve code - explicitly set From: when generating an
2429 52. Exim crashed if a remote delivery caused a very long error message to be
2430 recorded - for instance if somebody sent an entire SpamAssassin report back
2431 as a large number of 550 error lines. This bug was coincidentally fixed by
2432 increasing the size of one of Exim's internal buffers (big_buffer) that
2433 happened as part of the Exiscan merge. However, to be on the safe side, I
2434 have made the code more robust (and fixed the comments that describe what
2437 53. Now that there can be additional text after "Completed" in log lines (if
2438 the queue_time_overall log selector is set), a one-byte patch to exigrep
2439 was needed to allow it to recognize "Completed" as not the last thing in
2442 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2443 patch that reportedly fixes this has been added. I am not expert enough to
2444 create a test for it. This is what the patch creator wrote:
2446 "I found a little strange behaviour of ldap code when working with
2447 Windows 2003 AD Domain, where users was placed in more than one
2448 Organization Units. When I tried to give exim partial DN, the exit code
2449 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2450 But simultaneously result of request was absolutely normal ldap result,
2451 so I produce this patch..."
2453 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2454 REFERENCE, so I have modified the code to exclude the patch when that macro
2457 55. Some experimental protocols are using DNS PTR records for new purposes. The
2458 keys for these records are domain names, not reversed IP addresses. The
2459 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2460 leaves it alone. Component reversal etc. now happens only for IP addresses.
2463 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2465 57. Double the size of the debug message buffer (to 2048) so that more of very
2466 long debug lines gets shown.
2468 58. The exicyclog utility now does better if the number of log files to keep
2469 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2471 59. Two changes related to the smtp_active_hostname option:
2473 (1) $smtp_active_hostname is now available as a variable.
2474 (2) The default for smtp_banner uses $smtp_active_hostname instead
2475 of $primary_hostname.
2477 60. The host_aton() function is supposed to be passed a string that is known
2478 to be a valid IP address. However, in the case of IPv6 addresses, it was
2479 not checking this. This is a hostage to fortune. Exim now panics and dies
2480 if the condition is not met. A case was found where this could be provoked
2481 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2482 components; fortuitously, this particular loophole had already been fixed
2483 by change 4.50/55 above.
2485 If there are any other similar loopholes, the new check in host_aton()
2486 itself should stop them being exploited. The report I received stated that
2487 data on the command line could provoke the exploit when Exim was running as
2488 exim, but did not say which command line option was involved. All I could
2489 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2490 running as the user.
2493 61. There was a buffer overflow vulnerability in the SPA authentication code
2494 (which came originally from the Samba project). I have added a test to the
2495 spa_base64_to_bits() function which I hope fixes it.
2498 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2499 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2501 63. The daemon start-up calls getloadavg() while still root for those OS that
2502 need the first call to be done as root, but it missed one case: when
2503 deliver_queue_load_max is set with deliver_drop_privilege. This is
2504 necessary for the benefit of the queue runner, because there is no re-exec
2505 when deliver_drop_privilege is set.
2507 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2508 This has been fixed.
2510 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2511 was in use, was not putting the data itself into the right store pool;
2512 consequently, it could be overwritten for a subsequent message in the same
2513 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2516 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2518 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2519 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2520 the function were treating the return as a boolean value, which happened to
2521 work because 0=false and not-0=true, but is not correct code.
2523 68. The host_aton() function was not handling scoped IPv6 addresses (those
2524 with, for example, "%eth0" on the end) correctly.
2526 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2527 negated items (that is, ~something) in unsigned ints. Some compilers
2528 apparently mutter when there is no cast.
2530 70. If an address verification called from an ACL failed, and did not produce a
2531 user-specific message (i.e. there was only a "system" message), nothing was
2532 put in $acl_verify_message. In this situation, it now puts the system
2535 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2536 session; change 4.31/43 added the unwanted input to the log line - except
2537 that it did not do this in the start of session case. It now does.
2539 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2540 This is wrong and can cause the other end to generate a synchronization
2541 error if it is another Exim or anything else that does the synchronization
2542 check. A QUIT command is no longer sent after a timeout.
2544 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2545 during host lookups.
2547 74. The defer_ok option of callout verification was not working if it was used
2548 when verifying addresses in header lines, that is, for this case:
2550 verify = header_sender/callout=defer_ok
2552 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2553 those file descriptors could be used for SMTP connections. If anything
2554 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2555 could be sent to the SMTP client, causing chaos. The daemon now opens
2556 stdin, stdout, and stderr to /dev/null when it puts itself into the
2559 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2560 log by default. The user can override this with suitable Perl magic.
2562 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2563 the log message when discard triggers, was not working for the DATA ACL or
2564 for the non-SMTP ACL.
2566 78. Error message wording change in sieve.c.
2568 79. If smtp_accept_max_per_host was set, the number of connections could be
2569 restricted to fewer than expected, because the daemon was trying to set up
2570 a new connection before checking whether the processes handling previous
2571 connections had finished. The check for completed processes is now done
2572 earlier. On busy systems, this bug wouldn't be noticed because something
2573 else would have woken the daemon, and it would have reaped the completed
2576 80. If a message was submitted locally by a user whose login name contained one
2577 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2578 It caused a spool format error. I have fixed the spool reading code. A
2579 related problem was that the "from" clause in the Received: line became
2580 illegal because of the space(s). It is now covered by ${quote_local_part.
2582 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2585 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2587 83. Patch from Sieve maintainer to fix unterminated string problem in
2588 "vacation" handling.
2590 84. Some minor changes to the Linux configuration files to help with other
2591 OS variants using glibc.
2593 85. One more patch for Sieve to update vacation handling to latest spec.
2596 ----------------------------------------------------
2597 See the note above about the 4.44 and 4.50 releases.
2598 ----------------------------------------------------
2604 1. Change 4.43/35 introduced a bug that caused file counts to be
2605 incorrectly computed when quota_filecount was set in an appendfile
2608 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2609 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2612 3. Give more explanation in the error message when the command for a transport
2613 filter fails to execute.
2615 4. There are several places where Exim runs a non-Exim command in a
2616 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2617 was being done only for the command run by the queryprogram router. It is
2618 now done for all such subprocesses. The other cases are: ${run, transport
2619 filters, and the commands run by the lmtp and pipe transports.
2621 5. Some older OS have a limit of 256 on the maximum number of file
2622 descriptors. Exim was using setrlimit() to set 1000 as a large value
2623 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2624 systems. I've change it so that if it can't get 1000, it tries for 256.
2626 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2627 was an oversight, and furthermore, ever since the addition of extra
2628 controls (e.g. 4.43/32), the checks on when to allow different forms of
2629 "control" were broken. There should now be diagnostics for all cases when a
2630 control that does not make sense is encountered.
2632 7. $recipients is now available in the predata ACL (oversight).
2634 8. Tidy the search cache before the fork to do a delivery from a message
2635 received from the command line. Otherwise the child will trigger a lookup
2636 failure and thereby defer the delivery if it tries to use (for example) a
2637 cached ldap connection that the parent has called unbind on.
2639 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2640 of $address_data from the recipient verification was clobbered by the
2641 sender verification.
2643 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2644 was its contents. (It was OK if the option was not defined at all.)
2646 11. A "Completed" log line is now written for messages that are removed from
2647 the spool by the -Mrm option.
2649 12. $host_address is now set to the target address during the checking of
2650 ignore_target_hosts.
2652 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2653 being passed; this would have caused $sender_host_name to have been used if
2654 matching the list had actually called for a host name (not very likely,
2655 since this list is usually IP addresses). A host name is now passed as
2658 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2659 code that specifies a non-restarting handler (typically sigaction() in
2660 modern systems) in an attempt to fix a rare and obscure crash bug.
2662 15. Narrowed the window for a race in the daemon that could cause it to ignore
2663 SIGCHLD signals. This is not a major problem, because they are used only to
2664 wake it up if nothing else does.
2666 16. A malformed maildirsize file could cause Exim to calculate negative values
2667 for the mailbox size or file count. Odd effects could occur as a result.
2668 The maildirsize information is now recalculated if the size or filecount
2671 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2672 support for a long time. Removed HAVE_SYS_VFS_H.
2674 18. Updated exipick to current release from John Jetmore.
2676 19. Allow an empty sender to be matched against a lookup in an address list.
2677 Previously the only cases considered were a regular expression, or an
2680 20. Exim went into a mad DNS lookup loop when doing a callout where the
2681 host was specified on the transport, if the DNS lookup yielded more than
2684 21. The RFC2047 encoding function was originally intended for short strings
2685 such as real names; it was not keeping to the 75-character limit for
2686 encoded words that the RFC imposes. It now respects the limit, and
2687 generates multiple encoded words if necessary. To be on the safe side, I
2688 have increased the buffer size for the ${rfc2047: expansion operator from
2691 22. Failure to deliver a bounce message always caused it to be frozen, even if
2692 there was an errors_to setting on the router. The errors_to setting is now
2695 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2696 canonical form (fully expanded) before being placed in
2697 $sender_host_address.
2699 24. Updated eximstats to version 1.33
2701 25. Include certificate and key file names in error message when GnuTLS fails
2702 to set them up, because the GnuTLS error message doesn't include the name
2703 of the failing file when there is a problem reading it.
2705 26. Expand error message when OpenSSL has problems setting up cert/key files.
2708 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2709 (this can affect the format of dates).
2711 28. exim_tidydb, when checking for the continued existence of a message for
2712 which it has found a message-specific retry record, was not finding
2713 messages that were in split spool directories. Consequently, it was
2714 deleting retry records that should have stayed in existence.
2716 29. eximstats updated to version 1.35
2717 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2718 1.35 - bugfix such that pie charts by volume are generated correctly
2720 30. The SPA authentication driver was not abandoning authentication and moving
2721 on to the next authenticator when an expansion was forced to fail,
2722 contradicting the general specification for all authenticators. Instead it
2723 was generating a temporary error. It now behaves as specified.
2725 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2726 (the order specifies the preference for clients). The order is now AES256,
2727 AES128, 3DES, ARCFOUR128.
2729 31. Small patch to Sieve code - explicitly set From: when generating an
2732 32. Exim crashed if a remote delivery caused a very long error message to be
2733 recorded - for instance if somebody sent an entire SpamAssassin report back
2734 as a large number of 550 error lines. This bug was coincidentally fixed by
2735 increasing the size of one of Exim's internal buffers (big_buffer) that
2736 happened as part of the Exiscan merge. However, to be on the safe side, I
2737 have made the code more robust (and fixed the comments that describe what
2740 33. Some experimental protocols are using DNS PTR records for new purposes. The
2741 keys for these records are domain names, not reversed IP addresses. The
2742 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2743 leaves it alone. Component reversal etc. now happens only for IP addresses.
2746 34. The host_aton() function is supposed to be passed a string that is known
2747 to be a valid IP address. However, in the case of IPv6 addresses, it was
2748 not checking this. This is a hostage to fortune. Exim now panics and dies
2749 if the condition is not met. A case was found where this could be provoked
2750 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2751 components; fortuitously, this particular loophole had already been fixed
2752 by change 4.50/55 or 4.44/33 above.
2754 If there are any other similar loopholes, the new check in host_aton()
2755 itself should stop them being exploited. The report I received stated that
2756 data on the command line could provoke the exploit when Exim was running as
2757 exim, but did not say which command line option was involved. All I could
2758 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2759 running as the user.
2762 35. There was a buffer overflow vulnerability in the SPA authentication code
2763 (which came originally from the Samba project). I have added a test to the
2764 spa_base64_to_bits() function which I hope fixes it.
2767 36. The daemon start-up calls getloadavg() while still root for those OS that
2768 need the first call to be done as root, but it missed one case: when
2769 deliver_queue_load_max is set with deliver_drop_privilege. This is
2770 necessary for the benefit of the queue runner, because there is no re-exec
2771 when deliver_drop_privilege is set.
2773 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2774 was in use, was not putting the data itself into the right store pool;
2775 consequently, it could be overwritten for a subsequent message in the same
2776 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2779 38. Sometimes the final signoff response after QUIT could fail to get
2780 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2781 < 0 before doing a fflush(). This bug looks as though it goes back to the
2782 introduction of TLS in release 3.20, but "sometimes" must have been rare
2783 because the tests only now provoked it.
2789 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2790 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2791 Now it returns an integer. A number of calls were still expecting a T/F
2792 return. Fortuitously, in all cases, the tests worked in OK situations,
2793 which is the norm. However, things would have gone wrong on any write
2794 failures on the smtp file descriptor. This function is used when sending
2795 messages over SMTP and also when doing verify callouts.
2797 2. When Exim is called to do synchronous delivery of a locally submitted
2798 message (the -odf or -odi options), it no longer closes stderr before doing
2801 3. Implemented the mua_wrapper option.
2803 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2805 5. Implemented the functions header_remove(), header_testname(),
2806 header_add_at_position(), and receive_remove_recipient(), and exported them
2809 6. If an ACL "warn" statement specified the addition of headers, Exim already
2810 inserted X-ACL-Warn: at the start if there was no header name. However, it
2811 was not making this test for the second and subsequent header lines if
2812 there were newlines in the string. This meant that an invalid header could
2813 be inserted if Exim was badly configured.
2815 7. Allow an ACL "warn" statement to add header lines at the start or after all
2816 the Received: headers, as well as at the end.
2818 8. Added the rcpt_4xx retry error code.
2820 9. Added postmaster_mailfrom=xxx to callout verification option.
2822 10. Added mailfrom=xxxx to the callout verification option, for verify=
2825 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2826 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2828 12. Inserted some casts to stop certain compilers warning when using pointer
2829 differences as field lengths or precisions in printf-type calls (mostly
2830 affecting debugging statements).
2832 13. Added optional readline() support for -be (dynamically loaded).
2834 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2835 same clock tick as a message's arrival, so that its received time was the
2836 same as the "first fail" time on the retry record, and that message
2837 remained on the queue past the ultimate address timeout, every queue runner
2838 would try a delivery (because it was past the ultimate address timeout) but
2839 after another failure, the ultimate address timeout, which should have then
2840 bounced the address, did not kick in. This was a "< instead of <=" error;
2841 in most cases the first failure would have been in the next clock tick
2842 after the received time, and all would be well.
2844 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2845 being recognized when the domain list was tested by the match_domain
2846 condition in an expansion string.
2848 16. Added the ${str2b64: operator.
2850 17. Exim was always calling setrlimit() to set a large limit for the number of
2851 processes, without checking whether the existing limit was already
2852 adequate. (It did check for the limit on file descriptors.) Furthermore,
2853 errors from getrlimit() and setrlimit() were being ignored. Now they are
2854 logged to the main and panic logs, but Exim does carry on, to try to do its
2855 job under whatever limits there are.
2857 18. Imported PCRE 5.0.
2859 19. Trivial typo in log message " temporarily refused connection" (the leading
2862 20. If the log selector return_path_on_delivery was set and an address was
2863 redirected to /dev/null, the delivery process crashed because it assumed
2864 that a return path would always be set for a "successful" delivery. In this
2865 case, the whole delivery is bypassed as an optimization, and therefore no
2868 21. Internal re-arrangement: the function for sending a challenge and reading
2869 a response while authentication was assuming a zero-terminated challenge
2870 string. It's now changed to take a pointer and a length, to allow for
2871 binary data in such strings.
2873 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2875 23. Exim was not respecting finduser_retries when seeking the login of the
2876 uid under which it was called; it was always trying 10 times. (The default
2877 setting of finduser_retries is zero.) Also, it was sleeping after the final
2878 failure, which is pointless.
2880 24. Implemented tls_on_connect_ports.
2882 25. Implemented acl_smtp_predata.
2884 26. If the domain in control=submission is set empty, Exim assumes that the
2885 authenticated id is a complete email address when it generates From: or
2886 Sender: header lines.
2888 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2889 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2890 chown and chgrp in /bin and hostname in /usr/bin.
2892 28. Exim was keeping the "process log" file open after each use, just as it
2893 does for the main log. This opens the possibility of it remaining open for
2894 long periods when the USR1 signal hits a daemon. Occasional processlog
2895 errors were reported, that could have been caused by this. Anyway, it seems
2896 much more sensible not to leave this file open at all, so that is what now
2899 29. The long-running daemon process does not normally write to the log once it
2900 has entered its main loop, and it closes the log before doing so. This is
2901 so that log files can straightforwardly be renamed and moved. However,
2902 there are a couple of unusual error situations where the daemon does write
2903 log entries, and I had neglected to close the log afterwards.
2905 30. The text of an SMTP error response that was received during a remote
2906 delivery was being truncated at 512 bytes. This is too short for some of
2907 the long messages that one sometimes sees. I've increased the limit to
2910 31. It is now possible to make retry rules that apply only when a message has a
2911 specific sender, in particular, an empty sender.
2913 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2914 it possible to be selective about when SMTP synchronization is enforced.
2916 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2918 32. Implemented hosts_connection_nolog.
2920 33. Added an ACL for QUIT.
2922 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2925 35. Added mailbox_size and mailbox_filecount to appendfile.
2927 36. Added control = no_multiline_responses to ACLs.
2929 37. There was a bug in the logic of the code that waits for the clock to tick
2930 in the case where the clock went backwards by a substantial amount such
2931 that the microsecond fraction of "now" was more than the microsecond
2932 fraction of "then" (but the whole seconds number was less).
2934 38. Added support for the libradius Radius client library this is found on
2935 FreeBSD (previously only the radiusclient library was supported).
2941 1. When certain lookups returned multiple values in the form name=value, the
2942 quoting of the values was not always being done properly. Specifically:
2943 (a) If the value started with a double quote, but contained no whitespace,
2945 (b) If the value contained whitespace other than a space character (i.e.
2946 tabs or newlines or carriage returns) it was not quoted.
2947 This fix has been applied to the mysql and pgsql lookups by writing a
2948 separate quoting function and calling it from the lookup code. The fix
2949 should probably also be applied to nisplus, ibase and oracle lookups, but
2950 since I cannot test any of those, I have not disturbed their existing code.
2952 2. A hit in the callout cache for a specific address caused a log line with no
2953 reason for rejecting RCPT. Now it says "Previous (cached) callout
2954 verification failure".
2956 3. There was an off-by-one bug in the queryprogram router. An over-long
2957 return line was truncated at 256 instead of 255 characters, thereby
2958 overflowing its buffer with the terminating zero. As well as fixing this, I
2959 have increased the buffer size to 1024 (and made a note to document this).
2961 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2962 when Exim is waiting for an SMTP response from a remote server, Exim
2963 restarts its select() call on the socket, thereby resetting its timeout.
2964 This is not a problem when such interrupts are rare. Somebody set up a cron
2965 job to run exiwhat every 2 minutes, which is less than the normal select()
2966 timeout (5 or 10 minutes). This meant that the select() timeout never
2967 kicked in because it was always reset. I have fixed this by comparing the
2968 time when an interrupt arrives with the time at the start of the first call
2969 to select(). If more time than the timeout has elapsed, the interrupt is
2970 treated as a timeout.
2972 5. Some internal re-factoring in preparation for the addition of Sieve
2973 extensions (by MH). In particular, the "personal" test is moved to a
2974 separate function, and given an option for scanning Cc: and Bcc: (which is
2975 not set for Exim filters).
2977 6. When Exim created an email address using the login of the caller as the
2978 local part (e.g. when creating a From: or Sender: header line), it was not
2979 quoting the local part when it contained special characters such as @.
2981 7. Installed new OpenBSD configuration files.
2983 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2984 try to make them clearer.
2986 9. Callout options, other than the timeout value, were being ignored when
2987 verifying sender addresses in header lines. For example, when using
2989 verify = header_sender/callout=no_cache
2991 the cache was (incorrectly) being used.
2993 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2994 only the Cygwin environment.
2996 11. When return_path_on_delivery was set as a log selector, if different remote
2997 addresses in the same message used different return paths and parallel
2998 remote delivery occurred, the wrong values would sometimes be logged.
2999 (Whenever a remote delivery process finished, the return path value from
3000 the most recently started remote delivery process was logged.)
3002 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3003 lines when AUTH and/or TLS are in use. This is the "received protocol"
3004 field. Exim used to use "asmtp" for authenticated SMTP, without any
3005 indication (in the protocol name) for TLS use. Now it follows the RFC and
3006 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3007 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3008 names appear in log lines as well as in Received: header lines.
3010 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3011 extensions, and comparison tests, and to fix some bugs.
3013 14. Changes to the "personal" filter test:
3015 (1) The test was buggy in that it was just doing the equivalent of
3016 "contains" tests on header lines. For example, if a user's address was
3017 anne@some.where, the "personal" test would incorrectly be true for
3019 To: susanne@some.where
3021 This test is now done by extracting each address from the header in turn,
3022 and checking the entire address. Other tests that are part of "personal"
3023 are now done using regular expressions (for example, to check local parts
3024 of addresses in From: header lines).
3026 (2) The list of non-personal local parts in From: addresses has been
3027 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3028 taken from the Sieve specification recommendations.
3030 (3) If the message contains any header line starting with "List-" it is
3031 treated as non-personal.
3033 (4) The test for "circular" in the Subject: header line has been removed
3034 because it now seems ill-conceived.
3036 15. Minor typos in src/EDITME comments corrected.
3038 16. Installed latest exipick from John Jetmore.
3040 17. If headers_add on a router specified a text string that was too long for
3041 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3042 of string_sprintf() is now avoided.
3044 18. $message_body_size was not set (it was always zero) when running the DATA
3045 ACL and the local_scan() function.
3047 19. For the "mail" command in an Exim filter, no default was being set for
3048 the once_repeat time, causing a random time value to be used if "once" was
3049 specified. (If the value happened to be <= 0, no repeat happened.) The
3050 default is now 0s, meaning "never repeat". The "vacation" command was OK
3051 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3052 (I found it when inspecting the code).
3054 20. There is now an overall timeout for performing a callout verification. It
3055 defaults to 4 times the callout timeout, which applies to individual SMTP
3056 commands during the callout. The overall timeout applies when there is more
3057 than one host that can be tried. The timeout is checked before trying the
3058 next host. This prevents very long delays if there are a large number of
3059 hosts and all are timing out (e.g. when the network connections are timing
3060 out). The value of the overall timeout can be changed by specifying an
3061 additional sub-option for "callout", called "maxwait". For example:
3063 verify = sender/callout=5s,maxwait=20s
3065 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3066 to the end before writing, but this should make it even safer).
3068 22. Exim was forgetting that it had advertised PIPELINING for the second and
3069 subsequent messages on an SMTP connection. It was also not resetting its
3070 memory on STARTTLS and an internal HELO.
3072 23. When Exim logs an SMTP synchronization error within a session, it now
3073 records whether PIPELINING has been advertised or not.
3075 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3076 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3077 rather than long int.
3079 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3081 26. Added the never_mail option to autoreply.
3087 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3088 crash if the getsockname() call failed; this can happen if a connection is
3089 closed very soon after it is established. The problem was simply in the
3090 order in which certain operations were done, causing Exim to try to write
3091 to the SMTP stream before it had set up the file descriptor. The bug has
3092 been fixed by making things happen in the correct order.
3098 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3099 before the connection was closed, thus losing the rejection response.
3101 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3102 some early Solaris releases, but causes trouble in current releases where
3103 socklen_t is defined.
3105 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3108 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3111 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3112 that releasing the top of it at the end releases what was used for sub-
3113 expansions (unless the block got too big). However, discard this block if
3114 the first thing is a variable or header, so that we can use its block when
3115 it is dynamic (useful for very large $message_headers, for example).
3117 6. Lookups now cache *every* query, not just the most recent. A new, separate
3118 store pool is used for this. It can be recovered when all lookup caches are
3119 flushed. Lookups now release memory at the end of their result strings.
3120 This has involved some general refactoring of the lookup sources.
3122 7. Some code has been added to the store_xxx() functions to reduce the amount
3123 of flapping under certain conditions.
3125 8. log_incoming_interface used to affect only the <= reception log lines. Now
3126 it causes the local interface and port to be added to several more SMTP log
3127 lines, for example "SMTP connection from", and rejection lines.
3129 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3131 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3133 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3134 could be overwritten at the end of the current message (or the start of a
3135 new message if it was set in a HELO ACL). The value is now preserved for
3136 the duration of the SMTP connection.
3138 12. If a transport had a headers_rewrite setting, and a matching header line
3139 contained an unqualified address, that address was qualified, even if it
3140 did not match any rewriting rules. The underlying bug was that the values
3141 of the flags that permit the existence of unqualified sender and recipient
3142 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3143 non-local messages, and by -bnq for local messages) were not being
3144 preserved with the message after it was received.
3146 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3147 "next input=" as part of the text comprising the host identity instead of
3148 the correct text. The code was using the same buffer for two different
3149 strings. However, depending on which order the printing function evaluated
3150 its arguments, the bug did not always show up. Under Linux, for example, my
3151 test suite worked just fine.
3153 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3154 doesn't work with some older versions of Perl. It has been changed to "my",
3155 which in any case is probably the better facility to use.
3157 15. A really picky compiler found some instances of statements for creating
3158 error messages that either had too many or two few arguments for the format
3161 16. The size of the buffer for calls to the DNS resolver has been increased
3162 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3163 for addresses that have a lot of PTR records. This alleviates a problem; it
3164 does not fully solve it.
3166 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3167 buffer now truncates the list and logs the incident, which is the same
3168 action as happens when Exim is looking up a host name and its aliases.
3169 Previously in this situation something unpredictable would happen;
3170 sometimes it was "internal error: store_reset failed".
3172 18. If a server dropped the connection unexpectedly when an Exim client was
3173 using GnuTLS and trying to read a response, the client delivery process
3174 crashed while trying to generate an error log message.
3176 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3177 string, for example:
3179 warn message = H1: something\nH2: something
3181 the text was added as a single header line from Exim's point of view
3182 though it ended up OK in the delivered message. However, searching for the
3183 second and subsequent header lines using $h_h2: did not work. This has been
3184 fixed. Similarly, if a system filter added multiple headers in this way,
3185 the routers could not see them.
3187 20. Expanded the error message when iplsearch is called with an invalid key to
3188 suggest using net-iplsearch in a host list.
3190 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3191 ACLs are no longer actually imposed (and a message to that effect is
3194 22. If a "gecos" field in a passwd entry contained escaped characters, in
3195 particular, if it contained a \" sequence, Exim got it wrong when building
3196 a From: or a Sender: header from that name. A second bug also caused
3197 incorrect handling when an unquoted " was present following a character
3198 that needed quoting.
3200 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3201 was not being matched caselessly.
3203 24. Arranged for all hyphens in the exim.8 source to be escaped with
3206 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3207 properly. Recipient callout cache records were still being keyed to include
3208 the sender, even when use_sender was set false. This led to far more
3209 callouts that were necessary. The sender is no longer included in the key
3210 when use_sender is false.
3212 26. Added "control = submission" modifier to ACLs.
3214 27. Added the ${base62d: operator to decode base 62 numbers.
3216 28. dnsdb lookups can now access SRV records.
3218 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3219 the configuration file.
3221 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3222 (-v) mode. This makes the output for a verbose queue run more intelligible.
3224 31. Added a use_postmaster feature to recipient callouts.
3226 32. Added the $body_zerocount variable, containing the number of binary zero
3227 bytes in the message body.
3229 33. The time of last modification of the "new" subdirectory is now used as the
3230 "mailbox time last read" when there is a quota error for a maildir
3233 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3235 35. Added +ignore_unknown as a special item in host lists.
3237 36. Code for decoding IPv6 addresses in host lists is now included, even if
3238 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3239 address was recognized as an IP address, but was then not correctly decoded
3240 into binary, causing unexpected and incorrect effects when compared with
3247 1. Very minor rewording of debugging text in manualroute to say "list of
3248 hosts" instead of "hostlist".
3250 2. If verify=header_syntax was set, and a header line with an unqualified
3251 address (no domain) and a large number of spaces between the end of the
3252 name and the colon was received, the reception process suffered a buffer
3253 overflow, and (when I tested it) crashed. This was caused by some obsolete
3254 code that should have been removed. The fix is to remove it!
3256 3. When running in the test harness, delay a bit after writing a bounce
3257 message to get a bit more predictability in the log output.
3259 4. Added a call to search_tidyup() just before forking a reception process. In
3260 theory, someone could use a lookup in the expansion of smtp_accept_max_
3261 per_host which, without the tidyup, could leave open a database connection.
3263 5. Added the variables $recipient_data and $sender_data which get set from a
3264 lookup success in an ACL "recipients" or "senders" condition, or a router
3265 "senders" option, similar to $domain_data and $local_part_data.
3267 6. Moved the writing of debug_print from before to after the "senders" test
3270 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3271 problems for message scanning, either using a data ACL, or using
3272 local_scan() because the Received: header was not generated till after they
3273 were called (in order to set the time as the time of reception completion).
3274 I have revised the way this works. The header is now generated after the
3275 body is received, but before the ACL or local_scan() are called. After they
3276 are run, the timestamp in the header is updated.
3282 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3283 before starting a queue runner without re-exec. This happened only when
3284 deliver_drop_privilege was set or when the Exim user was set to root. The
3285 effect of the bug was that timeouts during subsequent deliveries caused
3286 crashes instead of being properly handled. The handler is now left at its
3287 default (and expected) setting.
3289 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3290 message, again when deliver_drop_privilege is set or Exim is run as root.
3291 The bug described in (1) was not present in this case, but the tidying up
3292 of the other signals was missing. I have made the two cases consistent.
3294 3. The ignore_target_hosts setting on a manualroute router was being ignored
3295 for hosts that were looked up using the /MX notation.
3297 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3300 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3301 operated on the sender address. After changing the $sender_address to <>
3302 for the sender address verify, Exim was re-instated it as the original
3303 (before rewriting) address, but remembering that it had rewritten it, so it
3304 wasn't rewriting it again. This bug also had the effect of breaking the
3305 sender address verification caching when the sender address was rewritten.
3307 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3308 This has been changed so that if the ip literal address matches
3309 ignore_target_hosts, the router declines.
3311 7. Added expansion conditions match_domain, match_address, and match_local_
3312 part (NOT match_host).
3314 8. The placeholder for the Received: header didn't have a length field set.
3316 9. Added code to Exim itself and to exim_lock to test for a specific race
3317 condition that could lead to file corruption when using MBX delivery. The
3318 issue is with the lockfile that is created in /tmp. If this file is removed
3319 after a process has opened it but before that process has acquired a lock,
3320 there is the potential for a second process to recreate the file and also
3321 acquire a lock. This could lead to two Exim processes writing to the file
3322 at the same time. The added code performs the same test as UW imapd; it
3323 checks after acquiring the lock that its file descriptor still refers to
3324 the same named file.
3326 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3327 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3330 11. Added the smtp_active_hostname option. If used, this will typically be made
3331 to depend on the incoming interface address. Because $interface_address is
3332 not set up until the daemon has forked a reception process, error responses
3333 that can happen earlier (such as "too many connections") no longer contain
3336 12. If an expansion in a condition on a "warn" statement fails because a lookup
3337 defers, the "warn" statement is abandoned, and the next ACL statement is
3338 processed. Previously this caused the whole ACL to be aborted.
3340 13. Added the iplsearch lookup type.
3342 14. Added ident_timeout as a log selector.
3344 15. Added tls_certificate_verified as a log selector.
3346 16. Added a global option tls_require_ciphers (compare the smtp transport
3347 option of the same name). This controls incoming TLS connections.
3349 17. I finally figured out how to make tls_require_ciphers do a similar thing
3350 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3351 before starting the TLS session.
3353 18. Tabs are now shown as \t in -bP output.
3355 19. If the log selector return_path_on_delivery was set, Exim crashed when
3356 bouncing a message because it had too many Received: header lines.
3358 20. If two routers both had headers_remove settings, and the first one included
3359 a superfluous trailing colon, the final name in the first list and the
3360 first name in the second list were incorrectly joined into one item (with a
3361 colon in the middle).
3367 1. Added -C and -D options to the exinext utility, mainly to make it easier
3368 to include in the automated testing, but these could be helpful when
3369 multiple configurations are in use.
3371 2. The exinext utility was not formatting the output nicely when there was
3372 an alternate port involved in the retry record key, nor when there was a
3373 message id as well (for retries that were specific to a specific message
3374 and a specific host). It was also confused by IPv6 addresses, because of
3375 the additional colons they contain. I have fixed the IPv4 problem, and
3376 patched it up to do a reasonable job for IPv6.
3378 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3379 delivery, the log line now contains "pipelined" if PIPELINING was used.
3381 4. An SMTP transport process used to panic and die if the bind() call to set
3382 an explicit outgoing interface failed. This has been changed; it is now
3383 treated in the same way as a connect() failure.
3385 5. A reference to $sender_host_name in the part of a conditional expansion
3386 that was being skipped was still causing a DNS lookup. This no longer
3389 6. The def: expansion condition was not recognizing references to header lines
3390 that used bh_ and bheader_.
3392 7. Added the _cache feature to named lists.
3394 8. The code for checking quota_filecount in the appendfile transport was
3395 allowing one more file than it should have been.
3397 9. For compatibility with Sendmail, the command line option
3405 and sets the incoming protocol and host name (for trusted callers). The
3406 host name and its colon can be omitted when only the protocol is to be set.
3407 Note the Exim already has two private options, -pd and -ps, that refer to
3408 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3409 "s", but I don't think that's a major issue.
3411 10. A number of refactoring changes to the code, none of which should affect
3414 (a) The number of logging options was getting close to filling up the
3415 32-bit word that was used as a bit map. I have split them into two classes:
3416 those that are passed in the argument to log_write(), and those that are
3417 only ever tested independently outside of that function. These are now in
3418 separate 32-bit words, so there is plenty of room for expansion again.
3419 There is no change in the user interface or the logging behaviour.
3421 (b) When building, for example, log lines, the code previously used a
3422 macro that called string_cat() twice, in order to add two strings. This is
3423 not really sufficiently general. Furthermore, there was one instance where
3424 it was actually wrong because one of the argument was used twice, and in
3425 one call a function was used. (As it happened, calling the function twice
3426 did not affect the overall behaviour.) The macro has been replaced by a
3427 function that can join an arbitrary number of extra strings onto a growing
3430 (c) The code for expansion conditions now uses a table and a binary chop
3431 instead of a serial search (which was left over from when there were very
3432 few conditions). Also, it now recognizes conditions like "pam" even when
3433 the relevant support is not compiled in: a suitably worded error message is
3434 given if an attempt is made to use such a condition.
3436 11. Added ${time_interval:xxxxx}.
3438 12. A bug was causing one of the ddress fields not to be passed back correctly
3439 from remote delivery subprocesses. The field in question was not being
3440 subsequently used, so this caused to problems in practice.
3442 13. Added new log selectors queue_time and deliver_time.
3444 14. Might have fixed a bug in maildirsizefile handling that threw up
3445 "unexpected character" debug warnings, and recalculated the data
3446 unnecessarily. In any case, I expanded the warning message to give more
3449 15. Added the message "Restricted characters in address" to the statements in
3450 the default ACL that block characters like @ and % in local parts.
3452 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3453 Three changes have been made:
3455 (a) There was a serious bug; a negative response to MAIL caused the whole
3456 recipient domain to be cached as invalid, thereby blocking all messages
3457 to all local parts at the same domain, from all senders. This bug has
3458 been fixed. The domain is no longer cached after a negative response to
3459 MAIL if the sender used is not empty.
3461 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3464 (c) A new callout option, "use_sender" has been added for people who want
3465 the modified behaviour.
3471 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3474 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3475 indeed breaks things for older releases.
3477 3. Added additional logging to the case where there is a problem reading data
3478 from a filter that is running in a subprocess using a pipe, in order to
3479 try to track down a specific problem.
3481 4. Testing facility fudge: when running in the test harness and attempting
3482 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3483 getting "No route to host". Convert this to a timeout.
3485 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3488 6. Some OS don't have socklen_t but use size_t instead. This affects the
3489 fifth argument of getsockopt() amongst other things. This is now
3490 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3491 can be set for individual OS. I have set it for SunOS5, OSF1, and
3492 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3493 some earlier ones do not.
3495 7. Change 4.30/15 was not doing the test caselessly.
3497 8. The standard form for an IPv6 address literal was being rejected by address
3498 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3499 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3500 this, as well as the form without the "IPv6" on the front (but only when
3501 address literals are enabled, of course).
3503 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3505 10. Exim crashed if a message with an empty sender address specified by -f
3506 encountered a router with an errors_to setting. This could be provoked only
3507 by a command such as
3511 where an empty string was supplied; "<>" did not hit this bug.
3513 11. Installed PCRE release 4.5.
3515 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3516 remained set. It is now erased.
3518 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3519 times from message ids (which are base 36 rather than the normal 62).
3521 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3522 were being counted as actual protocol errors, and logged if the log
3523 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3524 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3525 and DATA following a set of rejected RCPTs do not count as protocol errors.
3526 In other words, Exim assumes they were pipelined, though this may not
3527 actually be the case. Of course, in all cases the client gets an
3528 appropriate error code.
3530 15. If a lookup fails in an ACL condition, a message about the failure may
3531 be available; it is used if testing the ACL cannot continue, because most
3532 such messages specify what the cause of the deferral is. However, some
3533 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3534 that caused an old message to be retained and used if a later statement
3535 caused a defer, replacing the real cause of the deferral.
3537 16. If an IP address had so many PTR records that the DNS lookup buffer
3538 was not large enough to hold them, Exim could crash while trying to process
3539 the truncated data. It now detects and logs this case.
3541 17. Further to 4.21/58, another change has been made: if (and only if) the
3542 first line of a message (the first header line) ends with CRLF, a bare LF
3543 in a subsequent header line has a space inserted after it, so as not to
3544 terminate the header.
3546 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3547 unnecessarily, used atoi() instead of strtol(), and didn't check the
3548 termination when getting file sizes from file names by regex.
3550 19. Completely re-implemented the support for maildirsize files, in the light
3551 of a number of problems with the previous contributed implementation
3552 (4.30/29). In particular:
3554 . If the quota is zero, the maildirsize file is maintained, but no quota is
3557 . If the maildir directory does not exist, it is created before any attempt
3558 to write a maildirsize file.
3560 . The quota value in the file is just a cache; if the quota is changed in
3561 the transport, the new value overrides.
3563 . A regular expression is available for excluding directories from the
3566 20. The autoreply transport checks the characters in options that define the
3567 message's headers; it allows continued headers, but it was checking with
3568 isspace() after an embedded newline instead of explicitly looking for a
3571 21. If all the "regular" hosts to which an address was routed had passed their
3572 expiry times, and had not reached their retry times, the address was
3573 bounced, even if fallback hosts were defined. Now Exim should go on to try
3576 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3577 equivalent code in the SMTP transport. Some hosts send humungous responses
3578 to HELO/EHLO, more than 1024 it seems.
3580 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3581 gives compiler warnings in some environments. I've now done it "properly",
3584 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3585 (because of problems with the built-in one) was declared to return uschar *
3586 instead of char *, causing compiler failure.
3588 25. Fixed a file descriptor leak when processing alias/forward files.
3590 26. Fixed a minor format string issue in dbfn.c.
3592 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3594 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3595 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3598 29. When a sender address is verified, it is cached, to save repeating the test
3599 when there is more than one recipient in a message. However, when the
3600 verification involves a callout, it is possible for different callout
3601 options to be set for different recipients. It is too complicated to keep
3602 track of this in the cache, so now Exim always runs a verification when a
3603 callout is required, relying on the callout cache for the optimization.
3604 The overhead is duplication of the address routing, but this should not be
3607 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3608 to be verified with callout=postmaster, and the main callout worked but the
3609 postmaster check failed, the verification correctly failed. However, if a
3610 subsequent RCPT command asked for sender verification *without* the
3611 postmaster check, incorrect caching caused this verification also to fail,
3614 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3615 it was not caching the DNS options (qualify_single, search_parents) that
3616 were used when the lookup failed. A subsequent lookup with different
3617 options therefore always gave the same answer, though there were cases
3618 where it should not have. (Example: a "domains = !$mx_any" option on a
3619 dnslookup router: the "domains" option is always processed without any
3620 widening, but the router might have qualify_single set.) Now Exim uses the
3621 cached value only when the same options are set.
3623 32. Added John Jetmore's "exipick" utility to the distribution.
3625 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3626 than a timeout (e.g. a certificate is required, and is not provided), an
3627 Exim server now closes the connection immediately. Previously it waited for
3628 the client to close - but if the client is SSL, it seems that they each
3629 wait for each other, leading to a delay before one of them times out.
3631 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3632 maintained 0.8.x compatibility because I don't think many are using it, and
3633 it is clearly obsolete.
3635 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3638 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3639 client certificate was expired. A simple patch fixes this, though I don't
3640 understand the full logic of why the verify callback is called multiple
3643 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3644 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3645 which causes problems with some clients (such as the Certicom SSL Plus
3646 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3647 disables the coutermeasure allowing Eudora to connect."
3649 38. Exim was not checking that a write() to a log file succeeded. This could
3650 lead to Bad Things if a log got too big, in particular if it hit a file
3651 size limit. Exim now panics and dies if it cannot write to a log file, just
3652 as it does if it cannot open a log file.
3654 39. Modified OS/Makefile-Linux so that it now contains
3656 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3658 The two -D definitions ensure that Exim is compiled with large file
3659 support, which makes it possible to handle log files that are bigger than
3662 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3663 instance) a domain was checked against a named list that involved a lookup,
3664 causing $domain_data to be set, then another domain was checked against the
3665 same list, then the first domain was re-checked, the value of $domain_data
3666 after the final check could be wrong. In particular, if the second check
3667 failed, it could be set empty. This bug probably also applied to
3670 41. The strip_trailing_dot option was not being applied to the address given
3671 with the -f command-line option.
3673 42. The code for reading a message's header from the spool was incrementing
3674 $received_count, but never initializing it. This meant that the value was
3675 incorrect (doubled) while delivering a message in the same process in which
3676 it was received. In the most common configuration of Exim, this never
3677 happens - a fresh exec is done - but it can happen when
3678 deliver_drop_privilege is set.
3680 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3681 it now includes up to 150 characters of the unexpected data in the log
3684 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3685 and building data strings. The size of both of these buffers was 10 000
3686 bytes - far larger than anybody would *ever* want, thought I. Needless to
3687 say, somebody hit the limit. I have increased the maximum line length to
3688 20 000 and the maximum data length of concatenated lines to 100 000. I have
3689 also fixed two bugs, because there was no checking on these buffers. Tsk,
3690 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3691 buffer is too small.
3693 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3694 lsearch lookups. Now it does.
3696 46. When parsing a route_list item in a manualroute router, a fixed-length
3697 buffer was used for the list of hosts. I made this 1024 bytes long,
3698 thinking that nobody would ever have a list of hosts that long. Wrong.
3699 Somebody had a whole pile of complicated expansion conditions, and the
3700 string was silently truncated, leading to an expansion error. It turns out
3701 that it is easier to change to an unlimited length (owing to other changes
3702 that have happened since this code was originally written) than to build
3703 structure for giving a limitation error. The length of the item that
3704 expands into the list of hosts is now unlimited.
3706 47. The lsearch lookup could not handle data where the length of text line was
3707 more than 4095 characters. Such lines were truncated, leading to shortened
3708 data being returned. It should now handle lines of any length.
3710 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3711 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3714 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3715 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3716 no longer happens in comment lines. A list of replacements is now placed
3717 at the head of all of the source files, except those whose only change is
3718 to replace PERL_COMMAND in the very first #! line.
3720 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3721 messages on the queue, with a bottom-up merge sort, using code contributed
3722 by Michael Haardt. This should make operations like -bp somewhat faster on
3723 large queues. It won't affect queue runners, except when queue_run_in_order
3726 51. Installed eximstats 1.31 in the distribution.
3728 52. Added support for SRV lookups to the dnslookup router.
3730 53. If an ACL referred to $message_body or $message_body_end, the value was not
3731 reset for any messages that followed in the same SMTP session.
3733 54. The store-handling optimization for building very long strings was not
3734 differentiating between the different store pools. I don't think this
3735 actually made any difference in practice, but I've tidied it.
3737 55. While running the routers to verify a sender address, $sender_address
3738 was still set to the sender address. This is wrong, because when routing to
3739 send a bounce to the sender, it would be empty. Therefore, I have changed
3740 it so that, while verifying a sender address, $sender_address is set to <>.
3741 (There is no change to what happens when verifying a recipient address.)
3743 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3744 target A or AAAA records (if not already returned) without resetting the
3745 qualify_single or search_parents options of the DNS resolver. These are
3746 inappropriate in this case because the targets of MX and SRV records must
3747 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3748 target that, when qualified, matched something in the local domain. These
3749 two options are now turned off when doing these lookups.
3751 57. It seems that at least some releases of Reiserfs (which does not have the
3752 concept of a fixed number of inodes) returns zero and not -1 for the
3753 number of available inodes. This interacted badly with check_spool_inodes,
3754 which assumed that -1 was the "no such thing" setting. What I have done is
3755 to check that the total number of inodes is greater than zero before doing
3756 the test of how many are available.
3758 58. When a "warn" ACL statement has a log_message modifier, the message is
3759 remembered, and not repeated. This is to avoid a lot of repetition when a
3760 message has many recipients that cause the same warning to be written.
3761 Howewer, Exim was preserving the list of already written lines for an
3762 entire SMTP session, which doesn't seem right. The memory is now reset if a
3763 new message is started.
3765 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3766 debugging output unless log_rewrite was also set.
3768 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3769 of (int)(handle) when we know that handle contains (void *)(-1).
3771 61. The Exim daemon panic-logs an error return when it closes the incoming
3772 connection. However "connection reset by peer" seems to be common, and
3773 isn't really an error worthy of noting specially, so that particular error
3776 62. When Exim is trying to find all the local interfaces, it used to panic and
3777 die if the ioctl to get the interface flags failed. However, it seems that
3778 on at least one OS (Solaris 9) it is possible to have an interface that is
3779 included in the list of interfaces, but for which you get a failure error
3780 for this call. This happens when the interface is not "plumbed" into a
3781 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3782 failure of the "get flags" call assumes that the interface is down.
3784 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3785 makes life easier for people who are doing arithmetic on fields extracted
3786 from dates, where you often get leading zeros that should not be
3787 interpreted as octal.
3789 64. Added qualify_domain to the redirect router, to override the global
3792 65. If a pathologically long header line contained very many addresses (the
3793 report of this problem mentioned 10 000) and each of them was rewritten,
3794 Exim could use up a very large amount of memory. (It kept on making new
3795 copies of the header line as it rewrote, and never released the old ones.)
3796 At the expense of a bit more processing, the header rewriting function has
3797 been changed so that it no longer eats memory in this way.
3799 66. The generation of the Received: header has been moved from the time that a
3800 message starts to be received, to the time that it finishes. The timestamp
3801 in the Received: header should now be very close to that of the <= log
3802 line. There are two side-effects of this change:
3804 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3805 logged header lines no longer include the local Received: line, because
3806 it has not yet been created. The same applies to a copy of the message
3807 that is returned to a non-SMTP sender when a message is rejected.
3809 (b) When a filter file is tested using -bf, no additional Received: header
3810 is added to the test message. After some thought, I decided that this
3813 This change does not affect the value of $received_for. It is still set
3814 after address rewriting, but before local_scan() is called.
3816 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3818 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3819 gave an unhelpful panic error message, and a defer error. I have managed to
3820 change this behaviour so that it now rejects any supplied certificate,
3821 which seems right, as the list of acceptable certificates is empty.
3823 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3824 gave an unhelpful defer error. I have not managed to make this reject any
3825 supplied certificates, but the error message it gives is "no certificate
3826 supplied", which is not helpful.
3828 70. exigrep's output now also includes lines that are not associated with any
3829 message, but which match the given pattern. Implemented by a patch from
3830 Martin Sluka, which also tidied up the Perl a bit.
3832 71. Recipient callout verification, like sender verification, was using <> in
3833 the MAIL FROM command. This isn't really the right thing, since the actual
3834 sender may affect whether the remote host accepts the recipient or not. I
3835 have changed it to use the actual sender in the callout; this means that
3836 the cache record is now keyed on a recipient/sender pair, not just the
3837 recipient address. There doesn't seem to be a real danger of callout loops,
3838 since a callout by the remote host to check the sender would use <>.
3839 [SEE ABOVE: changed after hitting problems.]
3841 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3842 temporary errors. However, in the case of such a code being given after
3843 the end of a data transmission (i.e. after ".") Exim was failing to write
3844 a retry record for the message. (Yes, there was some broken host that was
3845 actually sending 8xx at this point.)
3847 73. An unknown lookup type in a host list could cause Exim to panic-die when
3848 the list was checked. (An example that provoked this was putting <; in the
3849 middle of a list instead of at the start.) If this happened during a DATA
3850 ACL check, a -D file could be left lying around. This kind of configuration
3851 error no longer causes Exim to die; instead it causes a defer errror. The
3852 incident is still logged to the main and panic logs.
3854 74. Buglet left over from Exim 3 conversion. The message "too many messages
3855 in one connection" was written to the rejectlog but not the mainlog, except
3856 when address rewriting (yes!) was being logged.
3858 75. Added write_rejectlog option.
3860 76. When a system filter was run not as root (that is, when system_filter_user
3861 was set), the values of the $n variables were not being returned to the
3862 main process; thus, they were not subsequently available in the $sn
3865 77. Added +return_path_on_delivery log selector.
3867 78. A connection timeout was being treated differently from recipients deferred
3868 when testing hosts_max_try with a message that was older than the host's
3869 retry timeout. (The host should not be counted, thus allowing all hosts to
3870 be tried at least once before bouncing.) This may have been the cause of an
3871 occasionally reported bug whereby a message would remain on the queue
3872 longer than the retry timeout, but would be bounced if a delivery was
3873 forced. I say "may" because I never totally pinned down the problem;
3874 setting up timeout/retry tests is difficult. See also the next item.
3876 79. The ultimate address timeout was not being applied to errors that involved
3877 a combination of host plus message (for example, a timeout on a MAIL
3878 command). When an address resolved to a number of possible hosts, and they
3879 were not all tried for each delivery (e.g. because of hosts_max_try), a
3880 message could remain on the queue longer than the retry timeout.
3882 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3885 81. Fixed an obscure SMTP outgoing bug which required at least the following
3886 conditions: (a) there was another message waiting for the same server;
3887 (b) the server returned 5xx to all RCPT commands in the first message so
3888 that the message was not completed; (c) the server dropped the connection
3889 or gave a negative response to the RSET that Exim sends to abort the
3890 transaction. The observed case was a dropped connection after DATA that had
3891 been sent in pipelining mode. That is, the server had advertised PIPELINING
3892 but was not implementing it correctly. The effect of the bug was incorrect
3893 behaviour, such as trying another host, and this could lead to a crash.
3899 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3900 and daemon.c were passed as pointers to ints; they should have been
3901 pointers to socklen_t variables (which are typically unsigned ints).
3903 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3906 3. Fixed a really odd bug that affected only the testing scheme; patching a
3907 certain fixed string in the binary changed the value of another string that
3908 happened to be identical to the end of the original first string.
3910 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3911 name", it returns that address as the IP address. On some operating
3912 systems (e.g. Solaris), it also passes back the IP address string as the
3913 "host name". However, on others (e.g. Linux), it passes back an empty
3914 string. Exim wasn't checking for this, and was changing the host name to an
3915 empty string, assuming it had been canonicized.
3917 5. Although rare, it is permitted to have more than one PTR record for a given
3918 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3919 all the names associated with an address, because they do in Solaris.
3920 However, it seems that they do not in Linux for data that comes from the
3921 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3922 I found this out when I moved to a new Linux workstation and tried to run
3923 the Exim test suite.
3925 To get round this problem I have changed the code so that it now does its
3926 own call to the DNS to look up PTR records when searching for a host name.
3927 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3928 addresses that are only in /etc/hosts are still found.
3930 This behaviour is, however, controlled by an option called host_lookup_
3931 order, which defaults to "bydns:byaddr". If people want to use the other
3932 order, or indeed, just use one or the other means of lookup, they can
3933 specify it in this variable.
3935 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3936 some operating systems, this comes back from gethostbyaddr() as an empty
3937 string, and this is what Exim used to test for. However, it seems that in
3938 other systems, "." is yielded. Exim now tests for this case too.
3940 7. The values of check_spool_space and check_log_space are now held internally
3941 as a number of kilobytes instead of an absolute number of bytes. If a
3942 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3943 kilobyte. This means that much larger values can be stored.
3945 8. Exim monitor: an attempt to get the action menu when not actually pointing
3946 at a message produces an empty menu entitled "No message selected". This
3947 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3948 no entries in it ("Shell widget menu has zero width and/or height"). So I
3949 have added a single, blank menu entry in this case.
3951 9. Added ${quote_local_part.
3953 10. MIME decoding is now applied to the contents of Subject: header lines when
3956 11. Now that a reference to $sender_host_address automatically causes a reverse
3957 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3958 host lookup before query-style lookups in lists that might use this
3959 variable. This has therefore been abolished, and the "net-" prefix is no
3960 longer necessary for query-style lookups.
3962 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3963 have been a typo for LFLAGS, so it has been changed.
3965 13. The install script calls Exim with "-C /dev/null" in order to find the
3966 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3967 to be output. Howeve, since Exim outputs its version number before the
3968 error, it didn't break the script. It just looked ugly. I fixed this by
3969 always allowing "-C /dev/null" if the caller is root.
3971 14. Ignore overlarge ACL variable number when reading spool file - insurance
3972 against a later release with more variables having written the file.
3974 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3975 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3976 this, as well as the form without the "IPv6" on the front.
3978 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3979 OS/Makefile-Darwin file.
3981 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3982 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3984 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3985 variable. However, some OS use ints for inodes. I've added cast to long int
3986 to get rid of the compiler warning.
3988 19. I had forgotten to lock out "/../" in configuration file names when
3989 ALT_CONFIG_PREFIX was set.
3991 20. Routers used for verification do not need to specify transports. However,
3992 if such a router generated a host list, and callout was configured, Exim
3993 crashed, because it could not find a port number from the (non-existent)
3994 transport. It now assumes port 25 in this circumstance.
3996 21. Added the -t option to exigrep.
3998 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3999 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4000 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4001 them is set, LOOKUP_LSEARCH is forced.
4003 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4005 24. Added sender and host information to the "rejected by local_scan()" log
4006 line; previously there was no indication of these.
4008 25. Added .include_if_exists.
4010 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4011 Linux. It turns out that not all file systems support this. Apparently some
4012 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4013 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4014 not supported on the file descriptor, is now ignored when Exim is trying to
4015 sync a directory. This applies only to Linux.
4017 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4019 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4020 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4023 29. Added support for maildirsize files from supplied patch (modified a bit).
4025 30. The use of :fail: followed by an empty string could lead Exim to respond to
4026 sender verification failures with (e.g.):
4028 550 Verification failed for <xxx>
4029 550 Sender verify failed
4031 where the first response line was missing the '-' that indicates it is not
4032 the final line of the response.
4034 31. The loop for finding the name of the user that called Exim had a hardwired
4035 limit of 10; it now uses the value of finduser_retries, which is used for
4036 all other user lookups.
4038 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4041 33. Exim was neglecting to zero errno before one call of strtol() when
4042 expanding a string and expecting an integer value. On some systems this
4043 resulted in spurious "integer overflow" errors. Also, it was casting the
4044 result into an int without checking.
4046 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4047 did not work. The code looks as if it has *never* worked, though it appears
4048 to have been documented since at least releast 1.62. I have made it work.
4050 35. The "timeout_DNS" error in retry rules, also documented since at least
4051 1.62, also never worked. As it isn't clear exactly what this means, and
4052 clearly it isn't a major issue, I have abolished the feature by treating it
4053 as "timeout", and writing a warning to the main and panic logs.
4055 36. The display of retry rules for -brt wasn't always showing the error code
4058 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4059 timeout_connect_A, timeout_connect_MX.
4061 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4062 to the empty sender.
4064 39. The daemon was not analysing the content of -oX till after it had closed
4065 stderr and disconnected from the controlling terminal. This meant that any
4066 syntax errors were only noted on the panic log, and the return code from
4067 the command was 0. By re-arranging the code a little, I've made the
4068 decoding happen first, so such errors now appear on stderr, and the return
4069 code is 1. However, the actual setting up of the sockets still happens in
4070 the disconnected process, so errors there are still only recorded on the
4073 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4074 connections (as happens on some IP stacks) was logged at start up time as
4075 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4076 it from "IPv6 and IPv4", which means that two separate sockets are being
4079 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4080 says whether AF_INET or AF_INET6 was passed as an argument.
4082 42. Exiwhat output was messed up when time zones were included in log
4085 43. Exiwhat now gives more information about the daemon's listening ports,
4086 and whether -tls-on-connect was used.
4088 44. The "port" option of the smtp transport is now expanded.
4090 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4091 silently ignored. Now an error message is written to the main and panic
4094 46. There's a new ACL modifier called "logwrite" which writes to a log file
4095 as soon as it is encountered.
4097 47. Added $local_user_uid and $local_user_gid at routing time.
4099 48. Exim crashed when trying to verify a sender address that was being
4102 49. Exim was recognizing only a space character after ".include". It now also
4103 recognizes a tab character.
4105 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4106 extracting the relevant information from the specification. The man page no
4107 longer contains scrambled data for the -d option, and I've added a section
4108 at the front about calling Exim under different names.
4110 51. Added "extra_headers" argument to the "mail" command in filter files.
4112 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4115 53. Installed eximstats 1.29.
4117 54. Added transport_filter_timeout as a generic transport option.
4119 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4120 Cc: header lines. This was required by RFC 822, but it not required by RFC
4123 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4124 incoming messages that did not have them. Now it does so only if the
4125 message originates locally, that is, if there is no associated remote host
4126 address. When Resent- header lines are present, this applies to the Resent-
4127 lines rather than the non-Resent- lines.
4129 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4130 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4132 58. Messages for configuration errors now include the name of the main
4133 configuration file - useful now that there may be more than one file in a
4134 list (.included file names were always shown).
4136 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4137 for those rare installations that do not start the daemon as root or run it
4138 setuid root. I've cut out the call to initgroups() if the daemon is not
4141 60. The Exim user and group can now be bound into the binary as text strings
4142 that are looked up at the start of Exim's processing.
4144 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4146 62. Added $mailstore_basename variable.
4148 63. Installed patch to sieve.c from Michael Haardt.
4150 64. When Exim failed to open the panic log after failing to open the main log,
4151 the original message it was trying to log was written to stderr and debug
4152 output, but if they were not available (the usual case in production), it
4153 was lost. Now it is written to syslog before the two lines that record the
4154 failures to open the logs.
4156 65. Users' Exim filters run in subprocesses under the user's uid. It is
4157 possible for a "deliver" command or an alias in a "personal" command to
4158 provoke an address rewrite. If logging of address rewriting is configured,
4159 this fails because the process is not running as root or exim. There may be
4160 a better way of dealing with this, but for the moment (because 4.30 needs
4161 to be released), I have disabled address rewrite logging when running a
4162 filter in a non-root, non-exim process.
4168 1. The buildconfig auxiliary program wasn't quoting the value set for
4169 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4170 not defined. This bug was masked in 4.22 by the effect that was fixed in
4173 2. Some messages that were rejected after a message id was allocated were
4174 shown as "incomplete" by exigrep. It no longer does this for messages that
4175 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4177 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4178 have allow_domain_literals set, the ID did not get logged in the <= line.
4179 Domain literals are now always recognized in Message-ID: header lines.
4181 4. The first argument for a ${extract expansion item is the key name or field
4182 number. Leading and trailing spaces in this item were not being ignored,
4183 causing some misleading effects.
4185 5. When deliver_drop_privilege was set, single queue runner processes started
4186 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4187 same command in the process it spins off) were not dropping privilege.
4189 6. When the daemon running as "exim" started a queue runner, it always
4190 re-executed Exim in the spun-off process. This is a waste of effort when
4191 deliver_drop_privilege is set. The new process now just calls the
4192 queue-runner function directly.
4198 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4201 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4202 ignored. Though the use of -oP was forcing the writing of a pid file, it
4203 was always written to the default place.
4205 3. If the message "no IP address found for host xxxx" is generated during
4206 incoming verification, it is now followed by identification of the incoming
4207 connection (so you can more easily find what provoked it).
4209 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4211 5. Added some features to "harden" Exim a bit more against certain attacks:
4213 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4214 be put in Local/Makefile. This is like the never_users runtime option,
4215 but it cannot be overridden. The default setting is "root".
4217 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4218 prefix string with which any file named in a -C command line option
4221 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4222 is retained for -C and -D only if the caller of Exim is root. Without
4223 it, the exim user may also use -C and -D and retain privilege.
4225 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4226 command line option is disabled.
4228 6. Macro names set by the -D option must start with an upper case letter, just
4229 like macro names defined in the configuration file.
4231 7. Added "dereference=" facility to LDAP.
4233 8. Two instances of the typo "uknown" in the source files are fixed.
4235 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4236 the Configure-Makefile script screwed up while processing it.
4238 10. Incorporated PCRE 4.4.
4240 11. The SMTP synchronization check was not operating right at the start of an
4241 SMTP session. For example, it could not catch a HELO sent before the client
4242 waited for the greeting. There is now a check for outstanding input at the
4243 point when the greeting is written. Because of the duplex, asynchronous
4244 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4245 way, but not yet received, when the check is performed.
4247 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4248 on TCP/IP sockets, because this apparently causes some broken clients to
4251 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4252 unchanged) from the Cygwin maintainer.
4254 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4255 was supported instead of testing for mbx. Effectively a typo.
4257 15. The spa authenticator server code was not checking that the input it
4258 received was valid base64.
4260 16. The debug output line for the "set" modifier in ACLs was not showing the
4261 name of the variable that was being set.
4263 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4265 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4266 lookup on its own. Something else was needed to trigger the lookup. For
4267 example, a match in host_lookup or the need for a host name in a host list.
4268 Now, if $sender_host_name is referenced and the host name has not yet been
4269 looked up, a lookup is performed. If the lookup fails, the variable remains
4270 empty, and $host_lookup_failed is set to "1".
4272 19. Added "eqi" as a case-independent comparison operator.
4274 20. The saslauthd authentication condition could segfault if neither service
4275 nor realm was specified.
4277 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4278 error message that was logged was misleading, and incoming SMTP
4279 connections were dropped. The message is now more accurate, and temporary
4280 errors are given to SMTP connections.
4282 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4283 (except RSET) with a 421 error, until QUIT is received. However, it was
4284 failing to send a response to QUIT.
4286 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4287 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4288 ACL is now run after the helo_try_verify_hosts code.
4290 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4291 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4292 case-independent, so other case variants are also recognized). Apparently
4293 some systems use these upper case variants.
4295 25. If more than two messages were waiting for the same host, and a transport
4296 filter was specified for the transport, Exim sent two messages over the
4297 same TCP/IP connection, and then failed with "socket operation on non-
4298 socket" when it tried to send the third.
4300 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4302 27. The extern definition of crypt16() in expand.c was not being excluded when
4303 the OS had its own crypt16() function.
4305 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4306 as a preferred synonym for return_size_limit, both as an option and as an
4309 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4311 30. Changed the default configuration ACL to relax the local part checking rule
4312 for addresses that are not in any local domains. For these addresses,
4313 slashes and pipe symbols are allowed within local parts, but the sequence
4314 /../ is explicitly forbidden.
4316 31. SPA server authentication was not clearing the challenge buffer before
4319 32. log_message in a "warn" ACL statement was writing to the reject log as
4320 well as to the main log, which contradicts the documentation and doesn't
4321 seem right (because no rejection is happening). So I have stopped it.
4323 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4324 However, I am unable to do any testing of this.
4326 34. Fixed an infelicity in the appendfile transport. When checking directories
4327 for a mailbox, to see if any needed to be created, it was accidentally
4328 using path names with one or more superfluous leading slashes; tracing
4329 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4331 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4332 contents are added to the log line that is written for every discarded
4333 recipient. (Previously a log_message setting was ignored.)
4335 36. The ${quote: operator now quotes the string if it is empty.
4337 37. The install script runs exim in order to find its version number. If for
4338 some reason other than non-existence or emptiness, which it checks, it
4339 could not run './exim', it was installing it with an empty version number,
4340 i.e. as "exim-". This error state is now caught, and the installation is
4343 38. An argument was missing from the function that creates an error message
4344 when Exim fails to connect to the socket for saslauthd authentication.
4345 This could cause Exim to crash, or give a corrupted message.
4347 39. Added isip, isip4, and isip6 to ${if conditions.
4349 40. The ACL variables $acl_xx are now saved with the message, and can be
4350 accessed later in routers, transports, and filters.
4352 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4353 strings in the file are not string-expanded.
4355 42. If a MAIL command specified a SIZE value that was too large to fit into an
4356 int variable, the check against message_size_limit failed. Such values are
4357 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4358 day this will have to be increased, but I don't think I want to be around
4359 when emails are that large.
4366 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4367 iconv() is not standard in FreeBSD.
4369 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4370 IPv6 enabled. The observed symptom was a segmentation fault on return from
4371 the function os_common_find_running_interfaces() in src/os.c.
4373 3. In the check_special_case() function in daemon.c I had used "errno" as an
4374 argument name, which causes warnings on some systems. This was basically a
4375 typo, since it was named "eno" in the comments!
4377 4. The code that waits for the clock to tick (at a resolution of some fraction
4378 of a second) so as to ensure message-id uniqueness was always waiting for
4379 at least one whole tick, when it could have waited for less. [This is
4380 almost certainly not relevant at current processor speeds, where it is
4381 unlikely to ever wait at all. But we try to future-proof.]
4383 5. The function that sleeps for a time interval that includes fractions of a
4384 second contained a race. It did not block SIGALRM between setting the
4385 timer, and suspending (a couple of lines later). If the interval was short
4386 and the sigsuspend() was delayed until after it had expired, the suspension
4387 never ended. On busy systems this could lead to processes getting stuck for
4390 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4391 process, before it forks any delivery processes. The open lookup caching
4392 mechanism meant that the open file or database connection was passed into
4393 the delivery process. The problem was that delivery processes always tidy
4394 up cached lookup data. This could cause a problem for the next delivery
4395 process started by the queue runner, because the external queue runner
4396 process does not know about the closure. So the next delivery process
4397 still has data in the lookup cache. In the case of a file lookup, there was
4398 no problem because closing a file descriptor in a subprocess doesn't affect
4399 the parent. However, if the lookup was caching a connection to a database,
4400 the connection was closed, and the second delivery process was likely to
4401 see errors such as "PGSQL: query failed: server closed the connection
4402 unexpectedly". The problem has been fixed by closing all cached lookups
4403 in a queue runner before running a delivery process.
4405 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4406 seem to have the "const" qualifier which it has on other OS. I've
4409 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4410 *of the same type* (client or server) with the same public name that an
4411 error should be diagnosed.
4413 9. When Exim looked up a host name for an IP address, but failed to find the
4414 original IP address when looking up the host name (a safety check), it
4415 output the message "<ip address> does not match any IP for NULL", which was
4416 confusing, to say the least. The bug was that the host name should have
4417 appeared instead of "NULL".
4419 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4420 user that is built into the binary, and the -C or -D options is used, root
4421 privilege is dropped before the configuration file is read. In addition,
4422 logging is switched to stderr instead of the normal log files. If the
4423 configuration then re-defines the Exim user, the unprivileged environment
4424 is probably not what is expected, so Exim logs a panic warning message (but
4427 However, if deliver_drop_privilege is set, the unprivileged state may well
4428 be exactly what is intended, so the warning has been cut out in that case,
4429 and Exim is allowed to try to write to its normal log files.
4435 1. smtp_return_error_details was not giving details for temporary sender
4436 or receiver verification errors.
4438 2. Diagnose a configuration error if two authenticators have the same public
4441 3. Exim used not to create the message log file for a message until the first
4442 delivery attempt. This could be confusing when incoming messages were held
4443 for policy or load reasons. The message log file is now created at the time
4444 the message is received, and an initial "Received" line is written to it.
4446 4. The automatically generated man page for command line options had a minor
4447 bug that caused no ill effects; however, a more serious problem was that
4448 the procedure for building the man page automatically didn't always
4449 operate. Consequently, release 4.20 contains an out-of-date version. This
4450 shouldn't happen again.
4452 5. When building Exim with embedded Perl support, the script that builds the
4453 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4454 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4456 6. The freeze_tell option was not being used for messages that were frozen on
4457 arrival, either by an ACL or by local_scan().
4459 7. Added the smtp_incomplete_transaction log selector.
4461 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4462 was accepting AUTH without a new EHLO.
4464 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4465 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4468 10. Logging of TCP/IP connections (when configured) now happens in the main
4469 daemon process instead of the child process, so that the TCP/IP connection
4470 count is more accurate (but it can never be perfect).
4472 11. The use of "drop" in a nested ACL was not being handled correctly in the
4473 outer ACL. Now, if condition failure induced by the nested "drop" causes
4474 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4475 or "require"), the connection is dropped.
4477 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4478 that yield "discard" can now be used with an "accept" or a "discard" verb,
4479 but an error is generated for any others (because I can't see a useful way
4480 to define what should happen).
4482 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4483 are now processed in the same way as lines in the Exim configuration file.
4484 In particular, continuation lines are supported.
4486 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4488 15. Added -ti meaning -t -i.
4490 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4491 domains, and warn by logging if others are found.
4493 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4494 returned from GIFCONF when Exim is trying to find the list of interfaces on
4495 a host. The code in os.c has been modified to copy each ifreq to an aligned
4496 structure in all cases.
4498 Also, in some cases, the returned ifreq's were being copied to a 'struct
4499 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4500 means the last couple of bytes of an IPv6 address could be chopped if the
4501 ifreq contained only a normal sockaddr (14 bytes storage).
4503 18. Named domain lists were not supported in the hosts_treat_as_local option.
4504 An entry such as +xxxx was not recognized, and was treated as a literal
4507 19. Ensure that header lines added by a DATA ACL are included in the reject log
4508 if the ACL subsequently rejects the message.
4510 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4511 MD5 (which is deprecated).
4513 21. When testing a filter file using -bf, Exim was writing a message when it
4514 took the sender from a "From " line in the message, but it was not doing so
4515 when it took $return_path from a Return-Path: header line. It now does.
4517 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4518 with a valid header line field name (a series of printing characters
4519 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4521 23. Changed "disc" in the source to "disk" to conform to the documentation and
4522 the book and for uniformity.
4524 24. Ignore Sendmail's -Ooption=value command line item.
4526 25. When execve() failed while trying to run a command in a pipe transport,
4527 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4528 could be confused with a return value of 69 from the command itself. This
4529 has been changed to 127, the value the shell returns if it is asked to run
4530 a non-existent command. The wording for the related log line suggests a
4531 non-existent command as the problem.
4533 26. If received_header_text expands to an empty string, do not add a Received:
4534 header line to the message. (Well, it adds a token one on the spool, but
4535 marks it "old" so that it doesn't get used or transmitted.)
4537 27. Installed eximstats 1.28 (addition of -nt option).
4539 28. There was no check for failure on the call to getsockname() in the daemon
4540 code. This can fail if there is a shortage of resources on the system, with
4541 ENOMEM, for example. A temporary error is now given on failure.
4543 29. Contrary to the C standard, it seems that in some environments, the
4544 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4545 program. Exim now does this explicitly; it affects the formatting of
4546 timestamps using strftime().
4548 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4549 complaints. I've now initialized all the variables, to avoid this.
4551 32. Header lines added by a system filter were not being "seen" during
4552 transport-time rewrites.
4554 33. The info_callback() function passed to OpenSSL is set up with type void
4555 (*)(SSL *, int, int), as described somewhere. However, when calling the
4556 function (actually a macro) that sets it up, the type void(*)() is
4557 expected. I've put in a cast to prevent warnings from picky compilers.
4559 34. If a DNS black list lookup found a CNAME record, but there were no A
4560 records associated with the domain it pointed at, Exim crashed.
4562 35. If a DNS black list lookup returned more than one A record, Exim ignored
4563 all but the first. It now scans all returned addresses if a particular IP
4564 value is being sought. In this situation, the contents of the
4565 $dnslist_value variable are a list of all the addresses, separated by a
4568 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4569 to accept a host name and all its aliases if the forward lookup for any of
4570 them yielded the IP address of the incoming connection. Now it accepts only
4571 those names whose forward lookup yields the correct IP address. Any other
4572 names are discarded. This closes a loophole whereby a rogue DNS
4573 administrator could create reverse DNS records to break through a
4574 wildcarded host restriction in an ACL.
4576 37. If a user filter or a system filter that ran in a subprocess used any of
4577 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4578 the wrong values were passed to the pipe command ($thisaddress had the
4579 value of $0, $0 had the value of $1, etc). This bug was introduced by
4580 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4582 38. Improved the line breaking for long SMTP error messages from ACLs.
4583 Previously, if there was no break point between 40 and 75 characters, Exim
4584 left the rest of the message alone. Two changes have been made: (a) I've
4585 reduced the minimum length to 35 characters; (b) if it can't find a break
4586 point between 35 and 75 characters, it looks ahead and uses the first one
4587 that it finds. This may give the occasional overlong line, but at least the
4588 remaining text gets split now.
4590 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4591 file descriptors might be low, and that setting 1000 would always raise it.
4592 It turns out that in some environments, the limit is already over 1000 and
4593 that lowering it causes trouble. So now Exim takes care not to decrease it.
4595 40. When delivering a message, the value of $return_path is set to $sender_
4596 address at the start of routing (routers may change the value). By an
4597 oversight, this default was not being set up when an address was tested by
4598 -bt or -bv, which affected the outcome if any router or filter referred to
4601 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4602 log only when "message" or "log_message" are set. However, if one of the
4603 conditions was an address verification, or a call to a nested ACL, the
4604 messages generated by the underlying test were being passed through. This
4605 no longer happens. The underlying message is available in $acl_verify_
4606 message for both "message" and "log_message" expansions, so it can be
4607 passed through if needed.
4609 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4610 new expansion $bh_ to give the encoded byte string without charset
4611 translation. Translation happens only if iconv() is available; HAVE_ICONV
4612 indicates this at build time. HEADERS_CHARSET gives the charset to
4613 translate to; headers_charset can change it in the configuration, and
4614 "headers charset" can change it in an individual filter file.
4616 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4617 that creates RFC 2047 encoded "words" labels them as that charset instead
4618 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4619 expansion operator; (ii) when Exim creates a From: line for a local
4620 message; (iii) when a header line is rewritten to include a "phrase" part.
4622 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4623 buggy, causing it to skip the first lines of messages whose message ID
4624 ended in 'D'. This would not have bitten before Exim release 4.14, because
4625 message IDs were unlikely to end in 'D' before then. The effect was to have
4626 incorrect size information for certain domains.
4628 45. #include "config.h" was missing at the start of the crypt16.c module. This
4629 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4632 46. If there was a timeout during a "random" callout check, Exim treated it as
4633 a failure of the random address, and carried on sending RSET and the real
4634 address. If the delay was just some slowness somewhere, the response to the
4635 original RCPT would be taken as a response to RSET and so on, causing
4636 mayhem of various kinds.
4638 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4639 when I implemented it. It didn't allow for the fact that some option values
4640 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4641 the right test for positive values.
4643 48. Domain names in DNS records are case-independent. Exim always looks them up
4644 in lower case. Some resolvers return domain names in exactly the case they
4645 appear in the zone file, that is, they may contain uppercase letters. Not
4646 all resolvers do this - some return always lower case. Exim was treating a
4647 change of case by a resolver as a change of domain, similar to a widening
4648 of a domain abbreviation. This triggered its re-routing code and so it was
4649 trying to route what was effectively the same domain again. This normally
4650 caused routing to fail (because the router wouldn't handle the domain
4651 twice). Now Exim checks for this case specially, and just changes the
4652 casing of the domain that it ultimately uses when it transmits the message
4655 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4658 50. If a filter generated a file delivery with a non-absolute name (possible if
4659 no home directory exists for the router), the forbid_file option was not
4662 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4663 the existing equality matching.
4665 52. Exim was using ints instead of ino_t variables in some places where it was
4666 dealing with inode numbers.
4668 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4669 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4670 called TMPDIR, and if it finds it is different, it changes its value.
4672 54. The smtp_printf() function is now made available to local_scan() so
4673 additional output lines can be written before returning. There is also an
4674 smtp_fflush() function to enable the detection of a dropped connection.
4675 The variables smtp_input and smtp_batched_input are exported to
4678 55. Changed the default runtime configuration: the message "Unknown user"
4679 has been removed from the ACL, and instead placed on the localuser router,
4680 using the cannot_route_message feature. This means that any verification
4681 failures that generate their own messages won't get overridden. Similarly,
4682 the "Unrouteable address" message that was in the ACL for unverifiable
4683 relay addresses has also been removed.
4685 56. Added hosts_avoid_esmtp to the smtp transport.
4687 57. The exicyclog script was not checking for the esoteric option
4688 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4689 will work only if exicyclog is run under the appropriate euid.
4691 58. Following a discussion on the list, the rules by which Exim recognises line
4692 endings on incoming messages have been changed. The -dropcr and drop_cr
4693 options are now no-ops, retained only for backwards compatibility. The
4694 following line terminators are recognized: LF CRLF CR. However, special
4695 processing applies to CR:
4697 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4698 nor a local message in the state where . is a terminator.
4700 (ii) If a bare CR is encountered in a header line, an extra space is added
4701 after the line terminator so as not to end the header. The reasoning
4702 behind this is that bare CRs in header lines are most likely either
4703 to be mistakes, or people trying to play silly games.
4705 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4706 was being incorrectly given as 18 bytes larger than it should have been.
4707 This is a VOB (very old bug).
4709 60. This may never have affected anything current, but just in case it has:
4710 When the local host is found other than at the start of a list of hosts,
4711 the local host, those with the same MX, and any that follow, are discarded.
4712 When the list in question was part of a longer list of hosts, the following
4713 hosts (not currently being processed) were also being discarded. This no
4714 longer happens. I'm not sure if this situation could ever has previously
4717 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4720 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4721 header. This is something that is recommended in a new Internet Draft, and
4722 is something that is documented as being done by Sendmail. There are two
4723 possible values. For messages generated by the autoreply transport, Exim
4726 Auto-Submitted: auto-replied
4728 whereas for all other generated messages (e.g. bounces) it adds
4730 Auto-Submitted: auto-generated
4732 63. The "personal" condition in filters now includes a test for the
4733 Auto-Submitted: header. If it contains the string "auto-" the message it
4734 not considered personal.
4736 64. Added rcpt_include_affixes as a generic transport option.
4738 65. Added queue_only_override (default true).
4740 66. Added the syslog_duplication option.
4742 67. If what should have been the first header line of a message consisted of
4743 a space followed by a colon, Exim was mis-interpreting it as a header line.
4744 It isn't of course - it is syntactically invalid and should therefore be
4745 treated as the start of the message body. The misbehaviour could have
4746 caused a number of strange effects, including loss of data in subsequent
4747 header lines, and spool format errors.
4749 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4750 client host had authenticated. This control can now be exercised by an ACL
4751 for more flexibility.
4753 69. By default, callouts do not happen when testing with -bh. There is now a
4754 variant, -bhc, which does actually run the callout code, including
4755 consulting and updating the callout cache.
4757 70. Added support for saslauthd authentication, courtesy of Alexander
4760 71. If statvfs() failed on the spool or log directories while checking their
4761 size for availability, Exim confusingly gave the error "space shortage".
4762 Furthermore, in debugging mode it crashed with a floating point exception.
4763 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4764 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4765 serious problem, Exim now writes to the main and panic logs when this
4766 happens, with details of the failure. It then refuses to accept the
4767 incoming message, giving the message "spool directory problem" or "log
4768 directory problem" with a 421 code for SMTP messages.
4770 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4771 0, 1, and 2 exist, because some OS complain for execs without them (see
4772 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4773 descriptors. However, the code omitted to check that the open succeeded,
4774 causing mysterious errors if for some reason the permissions on /dev/null
4775 got screwed. Now Exim writes a message to the main and panic logs, and
4776 bombs out if it can't open /dev/null.
4778 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4779 interact so that it is all more flexible. It is supposed to remain
4780 backwards compatible. Also added extra_local_interfaces.
4782 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4783 to bomb out with an assertion failure - to the client this appears as a
4784 connection drop. This problem occurs in the part of the code that was taken
4785 from the Samba project. Fortunately, the assertion is in a very simple
4786 function, so I have fixed this by reproducing the function inline in the
4787 one place where it is called, and arranging for authentication to fail
4788 instead of killing the process with assert().
4790 75. The SPA client code was not working when the server requested OEM rather
4791 than Unicode encoding.
4793 76. Added code to make require_files with a specific uid setting more usable in
4794 the case where statting the file as root fails - usually a non-root-mounted
4795 NFS file system. When this happens and the failure is EACCES, Exim now
4796 forks a subprocess and does the per-uid checking as the relevant uid.
4798 77. Added process_log_path.
4800 78. If log_file_path was not explicitly set, a setting of check_log_space or
4801 check_log_inodes was ignored.
4803 79. If a space check for the spool or log partitions fails, the incident is now
4804 logged. Of course, in the latter case the data may get lost...
4806 80. Added the %p formatting code to string_format() so that it can be used to
4807 print addresses in debug_print(). Adjusted all the address printing in the
4808 debugging in store.c to use %p rather than %d.
4810 81. There was a concern that a line of code in smtp_in.c could overflow a
4811 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4812 initially expressed, the concern was not well-founded, because trailing
4813 spaces are removed early. However, if the trailing spaces were followed by
4814 a NULL, they did not get removed, so the overflow was possible. Two fixes
4817 (a) I re-wrote the offending code in a cleaner fashion.
4818 (b) If an incoming SMTP command contains a NULL character, it is rejected
4821 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4822 runs initgroups(), so that if the Exim user is in any additional groups,
4823 they will be used during message reception.
4829 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob